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H A D | mkbuildinf.pl | diff 1.1.1.3 Thu Feb 08 20:57:00 MST 2018 christos branches: 1.1.1.3.2; 1.1.1.3.4; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.3 Thu Feb 08 20:57:00 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.3 Thu Feb 08 20:57:00 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] |
H A D | mkdir-p.pl | diff 1.1.1.2 Thu Feb 08 20:57:00 MST 2018 christos branches: 1.1.1.2.6; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.2 Thu Feb 08 20:57:00 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.2 Thu Feb 08 20:57:00 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] |
H A D | find-unused-errs | diff 1.1.1.1 Thu Feb 08 20:57:00 MST 2018 christos branches: 1.1.1.1.2; 1.1.1.1.4; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.1 Thu Feb 08 20:57:00 MST 2018 christos branches: 1.1.1.1.2; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] 1.1.1.1 Thu Feb 08 20:57:00 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] |
H A D | dofile.pl | diff 1.1.1.1 Thu Feb 08 20:57:00 MST 2018 christos branches: 1.1.1.1.2; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.1 Thu Feb 08 20:57:00 MST 2018 christos branches: 1.1.1.1.2; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.1 Thu Feb 08 20:57:00 MST 2018 christos branches: 1.1.1.1.2; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.1 Thu Feb 08 20:57:00 MST 2018 christos branches: 1.1.1.1.2; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] 1.1.1.1 Thu Feb 08 20:57:00 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] |
H A D | ck_errf.pl | diff 1.1.1.4 Thu Feb 08 20:57:00 MST 2018 christos branches: 1.1.1.4.2; 1.1.1.4.4; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.4 Thu Feb 08 20:57:00 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.4 Thu Feb 08 20:57:00 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] |
/netbsd-current/crypto/external/bsd/openssl/dist/test/ | ||
H A D | ssl_test.c | diff 1.1.1.1 Thu Feb 08 20:56:46 MST 2018 christos branches: 1.1.1.1.2; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.1 Thu Feb 08 20:56:46 MST 2018 christos branches: 1.1.1.1.2; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.1 Thu Feb 08 20:56:46 MST 2018 christos branches: 1.1.1.1.2; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] 1.1.1.1 Thu Feb 08 20:56:46 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] |
/netbsd-current/crypto/external/bsd/openssl/dist/apps/ | ||
H A D | openssl-vms.cnf | diff 1.1.1.4 Thu Feb 08 20:56:56 MST 2018 christos branches: 1.1.1.4.2; 1.1.1.4.4; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.4 Thu Feb 08 20:56:56 MST 2018 christos branches: 1.1.1.4.2; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.4 Thu Feb 08 20:56:56 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] |
/netbsd-current/crypto/external/bsd/openssl/dist/crypto/bf/ | ||
H A D | bf_pi.h | diff 1.1.1.3 Thu Feb 08 20:56:54 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.3 Thu Feb 08 20:56:54 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] |
H A D | bf_enc.c | diff 1.1.1.3 Thu Feb 08 20:56:54 MST 2018 christos branches: 1.1.1.3.2; 1.1.1.3.4; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.3 Thu Feb 08 20:56:54 MST 2018 christos branches: 1.1.1.3.2; 1.1.1.3.4; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.3 Thu Feb 08 20:56:54 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.3 Thu Feb 08 20:56:54 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] |
H A D | bf_ecb.c | diff 1.1.1.3 Thu Feb 08 20:56:54 MST 2018 christos branches: 1.1.1.3.2; 1.1.1.3.4; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.3 Thu Feb 08 20:56:54 MST 2018 christos branches: 1.1.1.3.2; 1.1.1.3.4; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.3 Thu Feb 08 20:56:54 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.3 Thu Feb 08 20:56:54 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] |
H A D | bf_skey.c | diff 1.1.1.4 Thu Feb 08 20:56:54 MST 2018 christos branches: 1.1.1.4.4; 1.1.1.4.6; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.4 Thu Feb 08 20:56:54 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.4 Thu Feb 08 20:56:54 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] |
H A D | bf_cfb64.c | diff 1.1.1.3 Thu Feb 08 20:56:54 MST 2018 christos branches: 1.1.1.3.4; 1.1.1.3.6; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.3 Thu Feb 08 20:56:54 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.3 Thu Feb 08 20:56:54 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] |
H A D | bf_ofb64.c | diff 1.1.1.3 Thu Feb 08 20:56:54 MST 2018 christos branches: 1.1.1.3.4; 1.1.1.3.6; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.3 Thu Feb 08 20:56:54 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.3 Thu Feb 08 20:56:54 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] |
/netbsd-current/crypto/external/bsd/openssl/dist/crypto/async/ | ||
H A D | async_wait.c | diff 1.1.1.1 Thu Feb 08 20:56:54 MST 2018 christos branches: 1.1.1.1.2; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.1 Thu Feb 08 20:56:54 MST 2018 christos branches: 1.1.1.1.2; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.1 Thu Feb 08 20:56:54 MST 2018 christos branches: 1.1.1.1.2; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.1 Thu Feb 08 20:56:54 MST 2018 christos branches: 1.1.1.1.2; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] 1.1.1.1 Thu Feb 08 20:56:54 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] |
/netbsd-current/crypto/external/bsd/openssl/dist/crypto/bf/asm/ | ||
H A D | bf-586.pl | diff 1.1.1.2 Thu Feb 08 20:56:54 MST 2018 christos branches: 1.1.1.2.2; 1.1.1.2.4; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.2 Thu Feb 08 20:56:54 MST 2018 christos branches: 1.1.1.2.2; 1.1.1.2.4; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.2 Thu Feb 08 20:56:54 MST 2018 christos branches: 1.1.1.2.2; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.2 Thu Feb 08 20:56:54 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] |
/netbsd-current/crypto/external/bsd/openssl/dist/crypto/comp/ | ||
H A D | comp_lib.c | diff 1.1.1.3 Thu Feb 08 20:56:55 MST 2018 christos branches: 1.1.1.3.2; 1.1.1.3.4; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.3 Thu Feb 08 20:56:55 MST 2018 christos branches: 1.1.1.3.2; 1.1.1.3.4; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.3 Thu Feb 08 20:56:55 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.3 Thu Feb 08 20:56:55 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] |
H A D | comp_err.c | diff 1.1.1.3 Thu Feb 08 20:56:55 MST 2018 christos branches: 1.1.1.3.2; 1.1.1.3.4; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.3 Thu Feb 08 20:56:55 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.3 Thu Feb 08 20:56:55 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] |
/netbsd-current/crypto/external/bsd/openssl/dist/crypto/lhash/ | ||
H A D | lh_stats.c | diff 1.1.1.3 Thu Feb 08 20:56:54 MST 2018 christos branches: 1.1.1.3.2; 1.1.1.3.4; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.3 Thu Feb 08 20:56:54 MST 2018 christos branches: 1.1.1.3.2; 1.1.1.3.4; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.3 Thu Feb 08 20:56:54 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.3 Thu Feb 08 20:56:54 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] |
/netbsd-current/crypto/external/bsd/openssl/dist/crypto/kdf/ | ||
H A D | kdf_err.c | diff 1.1.1.1 Thu Feb 08 20:56:51 MST 2018 christos branches: 1.1.1.1.2; 1.1.1.1.4; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.1 Thu Feb 08 20:56:51 MST 2018 christos branches: 1.1.1.1.2; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] 1.1.1.1 Thu Feb 08 20:56:51 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] |
H A D | build.info | diff 1.1.1.1 Thu Feb 08 20:56:51 MST 2018 christos branches: 1.1.1.1.2; 1.1.1.1.4; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.1 Thu Feb 08 20:56:51 MST 2018 christos branches: 1.1.1.1.2; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] 1.1.1.1 Thu Feb 08 20:56:51 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] |
/netbsd-current/crypto/external/bsd/openssl/dist/crypto/ocsp/ | ||
H A D | ocsp_cl.c | diff 1.1.1.4 Thu Feb 08 20:56:52 MST 2018 christos branches: 1.1.1.4.2; 1.1.1.4.4; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.4 Thu Feb 08 20:56:52 MST 2018 christos branches: 1.1.1.4.2; 1.1.1.4.4; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.4 Thu Feb 08 20:56:52 MST 2018 christos branches: 1.1.1.4.2; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.4 Thu Feb 08 20:56:52 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] |
H A D | ocsp_err.c | diff 1.1.1.3 Thu Feb 08 20:56:52 MST 2018 christos branches: 1.1.1.3.2; 1.1.1.3.4; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.3 Thu Feb 08 20:56:52 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.3 Thu Feb 08 20:56:52 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] |
H A D | ocsp_asn.c | diff 1.1.1.3 Thu Feb 08 20:56:52 MST 2018 christos branches: 1.1.1.3.4; 1.1.1.3.6; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.3 Thu Feb 08 20:56:52 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.3 Thu Feb 08 20:56:52 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] |
/netbsd-current/crypto/external/bsd/openssl/dist/crypto/seed/ | ||
H A D | seed.c | diff 1.1.1.5 Thu Feb 08 20:56:52 MST 2018 christos branches: 1.1.1.5.4; 1.1.1.5.6; Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.5 Thu Feb 08 20:56:52 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.5 Thu Feb 08 20:56:52 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] |
H A D | seed_ofb.c | diff 1.1.1.4 Thu Feb 08 20:56:52 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] diff 1.1.1.4 Thu Feb 08 20:56:52 MST 2018 christos Changes between 1.1.0f and 1.1.0g [2 Nov 2017] *) bn_sqrx8x_internal carry bug on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3736) [Andy Polyakov] *) Malformed X.509 IPAddressFamily could cause OOB read If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL could do a one-byte buffer overread. The most likely result would be an erroneous display of the certificate in text format. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3735) [Rich Salz] *) Ignore the '-named_curve auto' value for compatibility of applications with OpenSSL 1.0.2. [Tomas Mraz <tmraz@fedoraproject.org>] *) Support for SSL_OP_NO_ENCRYPT_THEN_MAC in SSL_CONF_cmd. [Emilia K��sper] Changes between 1.1.0e and 1.1.0f [25 May 2017] *) Have 'config' recognise 64-bit mingw and choose 'mingw64' as the target platform rather than 'mingw'. [Richard Levitte] *) Remove the VMS-specific reimplementation of gmtime from crypto/o_times.c. VMS C's RTL has a fully up to date gmtime() and gmtime_r() since V7.1, which is the minimum version we support. [Richard Levitte] Changes between 1.1.0d and 1.1.0e [16 Feb 2017] *) Encrypt-Then-Mac renegotiation crash During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL to crash (dependant on ciphersuite). Both clients and servers are affected. This issue was reported to OpenSSL by Joe Orton (Red Hat). (CVE-2017-3733) [Matt Caswell] Changes between 1.1.0c and 1.1.0d [26 Jan 2017] *) Truncated packet could crash via OOB read If one side of an SSL/TLS path is running on a 32-bit host and a specific cipher is being used, then a truncated packet can cause that host to perform an out-of-bounds read, usually resulting in a crash. This issue was reported to OpenSSL by Robert ��wi��cki of Google. (CVE-2017-3731) [Andy Polyakov] *) Bad (EC)DHE parameters cause a client crash If a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. This issue was reported to OpenSSL by Guido Vranken. (CVE-2017-3730) [Matt Caswell] *) BN_mod_exp may produce incorrect results on x86_64 There is a carry propagating bug in the x86_64 Montgomery squaring procedure. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem. This issue was reported to OpenSSL by the OSS-Fuzz project. (CVE-2017-3732) [Andy Polyakov] Changes between 1.1.0b and 1.1.0c [10 Nov 2016] *) ChaCha20/Poly1305 heap-buffer-overflow TLS connections using *-CHACHA20-POLY1305 ciphersuites are susceptible to a DoS attack by corrupting larger payloads. This can result in an OpenSSL crash. This issue is not considered to be exploitable beyond a DoS. This issue was reported to OpenSSL by Robert ��wi��cki (Google Security Team) (CVE-2016-7054) [Richard Levitte] *) CMS Null dereference Applications parsing invalid CMS structures can crash with a NULL pointer dereference. This is caused by a bug in the handling of the ASN.1 CHOICE type in OpenSSL 1.1.0 which can result in a NULL value being passed to the structure callback if an attempt is made to free certain invalid encodings. Only CHOICE structures using a callback which do not handle NULL value are affected. This issue was reported to OpenSSL by Tyler Nighswander of ForAllSecure. (CVE-2016-7053) [Stephen Henson] *) Montgomery multiplication may produce incorrect results There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected. This issue was publicly reported as transient failures and was not initially recognized as a security issue. Thanks to Richard Morgan for providing reproducible case. (CVE-2016-7055) [Andy Polyakov] *) OpenSSL now fails if it receives an unrecognised record type in TLS1.0 or TLS1.1. Previously this only happened in SSLv3 and TLS1.2. This is to prevent issues where no progress is being made and the peer continually sends unrecognised record types, using up resources processing them. [Matt Caswell] *) Removed automatic addition of RPATH in shared libraries and executables, as this was a remainder from OpenSSL 1.0.x and isn't needed any more. [Richard Levitte] Changes between 1.1.0a and 1.1.0b [26 Sep 2016] *) Fix Use After Free for large message sizes The patch applied to address CVE-2016-6307 resulted in an issue where if a message larger than approx 16k is received then the underlying buffer to store the incoming message is reallocated and moved. Unfortunately a dangling pointer to the old location is left which results in an attempt to write to the previously freed location. This is likely to result in a crash, however it could potentially lead to execution of arbitrary code. This issue only affects OpenSSL 1.1.0a. This issue was reported to OpenSSL by Robert ��wi��cki. (CVE-2016-6309) [Matt Caswell] Changes between 1.1.0 and 1.1.0a [22 Sep 2016] *) OCSP Status Request extension unbounded memory growth A malicious client can send an excessively large OCSP Status Request extension. If that client continually requests renegotiation, sending a large OCSP Status Request extension each time, then there will be unbounded memory growth on the server. This will eventually lead to a Denial Of Service attack through memory exhaustion. Servers with a default configuration are vulnerable even if they do not support OCSP. Builds using the "no-ocsp" build time option are not affected. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6304) [Matt Caswell] *) SSL_peek() hang on empty record OpenSSL 1.1.0 SSL/TLS will hang during a call to SSL_peek() if the peer sends an empty record. This could be exploited by a malicious peer in a Denial Of Service attack. This issue was reported to OpenSSL by Alex Gaynor. (CVE-2016-6305) [Matt Caswell] *) Excessive allocation of memory in tls_get_message_header() and dtls1_preprocess_fragment() A (D)TLS message includes 3 bytes for its length in the header for the message. This would allow for messages up to 16Mb in length. Messages of this length are excessive and OpenSSL includes a check to ensure that a peer is sending reasonably sized messages in order to avoid too much memory being consumed to service a connection. A flaw in the logic of version 1.1.0 means that memory for the message is allocated too early, prior to the excessive message length check. Due to way memory is allocated in OpenSSL this could mean an attacker could force up to 21Mb to be allocated to service a connection. This could lead to a Denial of Service through memory exhaustion. However, the excessive message length check still takes place, and this would cause the connection to immediately fail. Assuming that the application calls SSL_free() on the failed connection in a timely manner then the 21Mb of allocated memory will then be immediately freed again. Therefore the excessive memory allocation will be transitory in nature. This then means that there is only a security impact if: 1) The application does not call SSL_free() in a timely manner in the event that the connection fails or 2) The application is working in a constrained environment where there is very little free memory or 3) The attacker initiates multiple connection attempts such that there are multiple connections in a state where memory has been allocated for the connection; SSL_free() has not yet been called; and there is insufficient memory to service the multiple requests. Except in the instance of (1) above any Denial Of Service is likely to be transitory because as soon as the connection fails the memory is subsequently freed again in the SSL_free() call. However there is an increased risk during this period of application crashes due to the lack of memory - which would then mean a more serious Denial of Service. This issue was reported to OpenSSL by Shi Lei (Gear Team, Qihoo 360 Inc.) (CVE-2016-6307 and CVE-2016-6308) [Matt Caswell] *) solaris-x86-cc, i.e. 32-bit configuration with vendor compiler, had to be removed. Primary reason is that vendor assembler can't assemble our modules with -KPIC flag. As result it, assembly support, was not even available as option. But its lack means lack of side-channel resistant code, which is incompatible with security by todays standards. Fortunately gcc is readily available prepackaged option, which we firmly point at... [Andy Polyakov] Changes between 1.0.2h and 1.1.0 [25 Aug 2016] *) Windows command-line tool supports UTF-8 opt-in option for arguments and console input. Setting OPENSSL_WIN32_UTF8 environment variable (to any value) allows Windows user to access PKCS#12 file generated with Windows CryptoAPI and protected with non-ASCII password, as well as files generated under UTF-8 locale on Linux also protected with non-ASCII password. [Andy Polyakov] *) To mitigate the SWEET32 attack (CVE-2016-2183), 3DES cipher suites have been disabled by default and removed from DEFAULT, just like RC4. See the RC4 item below to re-enable both. [Rich Salz] *) The method for finding the storage location for the Windows RAND seed file has changed. First we check %RANDFILE%. If that is not set then we check the directories %HOME%, %USERPROFILE% and %SYSTEMROOT% in that order. If all else fails we fall back to C:\. [Matt Caswell] *) The EVP_EncryptUpdate() function has had its return type changed from void to int. A return of 0 indicates and error while a return of 1 indicates success. [Matt Caswell] *) The flags RSA_FLAG_NO_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME and DH_FLAG_NO_EXP_CONSTTIME which previously provided the ability to switch off the constant time implementation for RSA, DSA and DH have been made no-ops and deprecated. [Matt Caswell] *) Windows RAND implementation was simplified to only get entropy by calling CryptGenRandom(). Various other RAND-related tickets were also closed. [Joseph Wylie Yandle, Rich Salz] *) The stack and lhash API's were renamed to start with OPENSSL_SK_ and OPENSSL_LH_, respectively. The old names are available with API compatibility. They new names are now completely documented. [Rich Salz] *) Unify TYPE_up_ref(obj) methods signature. SSL_CTX_up_ref(), SSL_up_ref(), X509_up_ref(), EVP_PKEY_up_ref(), X509_CRL_up_ref(), X509_OBJECT_up_ref_count() methods are now returning an int (instead of void) like all others TYPE_up_ref() methods. So now these methods also check the return value of CRYPTO_atomic_add(), and the validity of object reference counter. [fdasilvayy@gmail.com] *) With Windows Visual Studio builds, the .pdb files are installed alongside the installed libraries and executables. For a static library installation, ossl_static.pdb is the associate compiler generated .pdb file to be used when linking programs. [Richard Levitte] *) Remove openssl.spec. Packaging files belong with the packagers. [Richard Levitte] *) Automatic Darwin/OSX configuration has had a refresh, it will now recognise x86_64 architectures automatically. You can still decide to build for a different bitness with the environment variable KERNEL_BITS (can be 32 or 64), for example: KERNEL_BITS=32 ./config [Richard Levitte] *) Change default algorithms in pkcs8 utility to use PKCS#5 v2.0, 256 bit AES and HMAC with SHA256. [Steve Henson] *) Remove support for MIPS o32 ABI on IRIX (and IRIX only). [Andy Polyakov] *) Triple-DES ciphers have been moved from HIGH to MEDIUM. [Rich Salz] *) To enable users to have their own config files and build file templates, Configure looks in the directory indicated by the environment variable OPENSSL_LOCAL_CONFIG_DIR as well as the in-source Configurations/ directory. On VMS, OPENSSL_LOCAL_CONFIG_DIR is expected to be a logical name and is used as is. [Richard Levitte] *) The following datatypes were made opaque: X509_OBJECT, X509_STORE_CTX, X509_STORE, X509_LOOKUP, and X509_LOOKUP_METHOD. The unused type X509_CERT_FILE_CTX was removed. [Rich Salz] *) "shared" builds are now the default. To create only static libraries use the "no-shared" Configure option. [Matt Caswell] *) Remove the no-aes, no-hmac, no-rsa, no-sha and no-md5 Configure options. All of these option have not worked for some while and are fundamental algorithms. [Matt Caswell] *) Make various cleanup routines no-ops and mark them as deprecated. Most global cleanup functions are no longer required because they are handled via auto-deinit (see OPENSSL_init_crypto and OPENSSL_init_ssl man pages). Explicitly de-initing can cause problems (e.g. where a library that uses OpenSSL de-inits, but an application is still using it). The affected functions are CONF_modules_free(), ENGINE_cleanup(), OBJ_cleanup(), EVP_cleanup(), BIO_sock_cleanup(), CRYPTO_cleanup_all_ex_data(), RAND_cleanup(), SSL_COMP_free_compression_methods(), ERR_free_strings() and COMP_zlib_cleanup(). [Matt Caswell] *) --strict-warnings no longer enables runtime debugging options such as REF_DEBUG. Instead, debug options are automatically enabled with '--debug' builds. [Andy Polyakov, Emilia K��sper] *) Made DH and DH_METHOD opaque. The structures for managing DH objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made RSA and RSA_METHOD opaque. The structures for managing RSA objects have been moved out of the public header files. New functions for managing these have been added. [Richard Levitte] *) Made DSA and DSA_METHOD opaque. The structures for managing DSA objects have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Made BIO and BIO_METHOD opaque. The structures for managing BIOs have been moved out of the public header files. New functions for managing these have been added. [Matt Caswell] *) Removed no-rijndael as a config option. Rijndael is an old name for AES. [Matt Caswell] *) Removed the mk1mf build scripts. [Richard Levitte] *) Headers are now wrapped, if necessary, with OPENSSL_NO_xxx, so it is always safe to #include a header now. [Rich Salz] *) Removed the aged BC-32 config and all its supporting scripts [Richard Levitte] *) Removed support for Ultrix, Netware, and OS/2. [Rich Salz] *) Add support for HKDF. [Alessandro Ghedini] *) Add support for blake2b and blake2s [Bill Cox] *) Added support for "pipelining". Ciphers that have the EVP_CIPH_FLAG_PIPELINE flag set have a capability to process multiple encryptions/decryptions simultaneously. There are currently no built-in ciphers with this property but the expectation is that engines will be able to offer it to significantly improve throughput. Support has been extended into libssl so that multiple records for a single connection can be processed in one go (for >=TLS 1.1). [Matt Caswell] *) Added the AFALG engine. This is an async capable engine which is able to offload work to the Linux kernel. In this initial version it only supports AES128-CBC. The kernel must be version 4.1.0 or greater. [Catriona Lucey] *) OpenSSL now uses a new threading API. It is no longer necessary to set locking callbacks to use OpenSSL in a multi-threaded environment. There are two supported threading models: pthreads and windows threads. It is also possible to configure OpenSSL at compile time for "no-threads". The old threading API should no longer be used. The functions have been replaced with "no-op" compatibility macros. [Alessandro Ghedini, Matt Caswell] *) Modify behavior of ALPN to invoke callback after SNI/servername callback, such that updates to the SSL_CTX affect ALPN. [Todd Short] *) Add SSL_CIPHER queries for authentication and key-exchange. [Todd Short] *) Changes to the DEFAULT cipherlist: - Prefer (EC)DHE handshakes over plain RSA. - Prefer AEAD ciphers over legacy ciphers. - Prefer ECDSA over RSA when both certificates are available. - Prefer TLSv1.2 ciphers/PRF. - Remove DSS, SEED, IDEA, CAMELLIA, and AES-CCM from the default cipherlist. [Emilia K��sper] *) Change the ECC default curve list to be this, in order: x25519, secp256r1, secp521r1, secp384r1. [Rich Salz] *) RC4 based libssl ciphersuites are now classed as "weak" ciphers and are disabled by default. They can be re-enabled using the enable-weak-ssl-ciphers option to Configure. [Matt Caswell] *) If the server has ALPN configured, but supports no protocols that the client advertises, send a fatal "no_application_protocol" alert. This behaviour is SHALL in RFC 7301, though it isn't universally implemented by other servers. [Emilia K��sper] *) Add X25519 support. Add ASN.1 and EVP_PKEY methods for X25519. This includes support for public and private key encoding using the format documented in draft-ietf-curdle-pkix-02. The corresponding EVP_PKEY method supports key generation and key derivation. TLS support complies with draft-ietf-tls-rfc4492bis-08 and uses X25519(29). [Steve Henson] *) Deprecate SRP_VBASE_get_by_user. SRP_VBASE_get_by_user had inconsistent memory management behaviour. In order to fix an unavoidable memory leak (CVE-2016-0798), SRP_VBASE_get_by_user was changed to ignore the "fake user" SRP seed, even if the seed is configured. Users should use SRP_VBASE_get1_by_user instead. Note that in SRP_VBASE_get1_by_user, caller must free the returned value. Note also that even though configuring the SRP seed attempts to hide invalid usernames by continuing the handshake with fake credentials, this behaviour is not constant time and no strong guarantees are made that the handshake is indistinguishable from that of a valid user. [Emilia K��sper] *) Configuration change; it's now possible to build dynamic engines without having to build shared libraries and vice versa. This only applies to the engines in engines/, those in crypto/engine/ will always be built into libcrypto (i.e. "static"). Building dynamic engines is enabled by default; to disable, use the configuration option "disable-dynamic-engine". The only requirements for building dynamic engines are the presence of the DSO module and building with position independent code, so they will also automatically be disabled if configuring with "disable-dso" or "disable-pic". The macros OPENSSL_NO_STATIC_ENGINE and OPENSSL_NO_DYNAMIC_ENGINE are also taken away from openssl/opensslconf.h, as they are irrelevant. [Richard Levitte] *) Configuration change; if there is a known flag to compile position independent code, it will always be applied on the libcrypto and libssl object files, and never on the application object files. This means other libraries that use routines from libcrypto / libssl can be made into shared libraries regardless of how OpenSSL was configured. If this isn't desirable, the configuration options "disable-pic" or "no-pic" can be used to disable the use of PIC. This will also disable building shared libraries and dynamic engines. [Richard Levitte] *) Removed JPAKE code. It was experimental and has no wide use. [Rich Salz] *) The INSTALL_PREFIX Makefile variable has been renamed to DESTDIR. That makes for less confusion on what this variable is for. Also, the configuration option --install_prefix is removed. [Richard Levitte] *) Heartbeat for TLS has been removed and is disabled by default for DTLS; configure with enable-heartbeats. Code that uses the old #define's might need to be updated. [Emilia K��sper, Rich Salz] *) Rename REF_CHECK to REF_DEBUG. [Rich Salz] *) New "unified" build system The "unified" build system is aimed to be a common system for all platforms we support. With it comes new support for VMS. This system builds supports building in a different directory tree than the source tree. It produces one Makefile (for unix family or lookalikes), or one descrip.mms (for VMS). The source of information to make the Makefile / descrip.mms is small files called 'build.info', holding the necessary information for each directory with source to compile, and a template in Configurations, like unix-Makefile.tmpl or descrip.mms.tmpl. With this change, the library names were also renamed on Windows and on VMS. They now have names that are closer to the standard on Unix, and include the major version number, and in certain cases, the architecture they are built for. See "Notes on shared libraries" in INSTALL. We rely heavily on the perl module Text::Template. [Richard Levitte] *) Added support for auto-initialisation and de-initialisation of the library. OpenSSL no longer requires explicit init or deinit routines to be called, except in certain circumstances. See the OPENSSL_init_crypto() and OPENSSL_init_ssl() man pages for further information. [Matt Caswell] *) The arguments to the DTLSv1_listen function have changed. Specifically the "peer" argument is now expected to be a BIO_ADDR object. *) Rewrite of BIO networking library. The BIO library lacked consistent support of IPv6, and adding it required some more extensive modifications. This introduces the BIO_ADDR and BIO_ADDRINFO types, which hold all types of addresses and chains of address information. It also introduces a new API, with functions like BIO_socket, BIO_connect, BIO_listen, BIO_lookup and a rewrite of BIO_accept. The source/sink BIOs BIO_s_connect, BIO_s_accept and BIO_s_datagram have been adapted accordingly. [Richard Levitte] *) RSA_padding_check_PKCS1_type_1 now accepts inputs with and without the leading 0-byte. [Emilia K��sper] *) CRIME protection: disable compression by default, even if OpenSSL is compiled with zlib enabled. Applications can still enable compression by calling SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION), or by using the SSL_CONF library to configure compression. [Emilia K��sper] *) The signature of the session callback configured with SSL_CTX_sess_set_get_cb was changed. The read-only input buffer was explicitly marked as 'const unsigned char*' instead of 'unsigned char*'. [Emilia K��sper] *) Always DPURIFY. Remove the use of uninitialized memory in the RNG, and other conditional uses of DPURIFY. This makes -DPURIFY a no-op. [Emilia K��sper] *) Removed many obsolete configuration items, including DES_PTR, DES_RISC1, DES_RISC2, DES_INT MD2_CHAR, MD2_INT, MD2_LONG BF_PTR, BF_PTR2 IDEA_SHORT, IDEA_LONG RC2_SHORT, RC2_LONG, RC4_LONG, RC4_CHUNK, RC4_INDEX [Rich Salz, with advice from Andy Polyakov] *) Many BN internals have been moved to an internal header file. [Rich Salz with help from Andy Polyakov] *) Configuration and writing out the results from it has changed. Files such as Makefile include/openssl/opensslconf.h and are now produced through general templates, such as Makefile.in and crypto/opensslconf.h.in and some help from the perl module Text::Template. Also, the center of configuration information is no longer Makefile. Instead, Configure produces a perl module in configdata.pm which holds most of the config data (in the hash table %config), the target data that comes from the target configuration in one of the Configurations/*.conf files (in %target). [Richard Levitte] *) To clarify their intended purposes, the Configure options --prefix and --openssldir change their semantics, and become more straightforward and less interdependent. --prefix shall be used exclusively to give the location INSTALLTOP where programs, scripts, libraries, include files and manuals are going to be installed. The default is now /usr/local. --openssldir shall be used exclusively to give the default location OPENSSLDIR where certificates, private keys, CRLs are managed. This is also where the default openssl.cnf gets installed. If the directory given with this option is a relative path, the values of both the --prefix value and the --openssldir value will be combined to become OPENSSLDIR. The default for --openssldir is INSTALLTOP/ssl. Anyone who uses --openssldir to specify where OpenSSL is to be installed MUST change to use --prefix instead. [Richard Levitte] *) The GOST engine was out of date and therefore it has been removed. An up to date GOST engine is now being maintained in an external repository. See: https://wiki.openssl.org/index.php/Binaries. Libssl still retains support for GOST ciphersuites (these are only activated if a GOST engine is present). [Matt Caswell] *) EGD is no longer supported by default; use enable-egd when configuring. [Ben Kaduk and Rich Salz] *) The distribution now has Makefile.in files, which are used to create Makefile's when Configure is run. *Configure must be run before trying to build now.* [Rich Salz] *) The return value for SSL_CIPHER_description() for error conditions has changed. [Rich Salz] *) Support for RFC6698/RFC7671 DANE TLSA peer authentication. Obtaining and performing DNSSEC validation of TLSA records is the application's responsibility. The application provides the TLSA records of its choice to OpenSSL, and these are then used to authenticate the peer. The TLSA records need not even come from DNS. They can, for example, be used to implement local end-entity certificate or trust-anchor "pinning", where the "pin" data takes the form of TLSA records, which can augment or replace verification based on the usual WebPKI public certification authorities. [Viktor Dukhovni] *) Revert default OPENSSL_NO_DEPRECATED setting. Instead OpenSSL continues to support deprecated interfaces in default builds. However, applications are strongly advised to compile their source files with -DOPENSSL_API_COMPAT=0x10100000L, which hides the declarations of all interfaces deprecated in 0.9.8, 1.0.0 or the 1.1.0 releases. In environments in which all applications have been ported to not use any deprecated interfaces OpenSSL's Configure script should be used with the --api=1.1.0 option to entirely remove support for the deprecated features from the library and unconditionally disable them in the installed headers. Essentially the same effect can be achieved with the "no-deprecated" argument to Configure, except that this will always restrict the build to just the latest API, rather than a fixed API version. As applications are ported to future revisions of the API, they should update their compile-time OPENSSL_API_COMPAT define accordingly, but in most cases should be able to continue to compile with later releases. The OPENSSL_API_COMPAT versions for 1.0.0, and 0.9.8 are 0x10000000L and 0x00908000L, respectively. However those versions did not support the OPENSSL_API_COMPAT feature, and so applications are not typically tested for explicit support of just the undeprecated features of either release. [Viktor Dukhovni] *) Add support for setting the minimum and maximum supported protocol. It can bet set via the SSL_set_min_proto_version() and SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and MaxProtcol. It's recommended to use the new APIs to disable protocols instead of disabling individual protocols using SSL_set_options() or SSL_CONF's Protocol. This change also removes support for disabling TLS 1.2 in the OpenSSL TLS client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT. [Kurt Roeckx] *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl. [Andy Polyakov] *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD and integrates ECDSA and ECDH functionality into EC. Implementations can now redirect key generation and no longer need to convert to or from ECDSA_SIG format. Note: the ecdsa.h and ecdh.h headers are now no longer needed and just include the ec.h header file instead. [Steve Henson] *) Remove support for all 40 and 56 bit ciphers. This includes all the export ciphers who are no longer supported and drops support the ephemeral RSA key exchange. The LOW ciphers currently doesn't have any ciphers in it. [Kurt Roeckx] *) Made EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX, EVP_CIPHER and HMAC_CTX opaque. For HMAC_CTX, the following constructors and destructors were added: HMAC_CTX *HMAC_CTX_new(void); void HMAC_CTX_free(HMAC_CTX *ctx); For EVP_MD and EVP_CIPHER, complete APIs to create, fill and destroy such methods has been added. See EVP_MD_meth_new(3) and EVP_CIPHER_meth_new(3) for documentation. Additional changes: 1) EVP_MD_CTX_cleanup(), EVP_CIPHER_CTX_cleanup() and HMAC_CTX_cleanup() were removed. HMAC_CTX_reset() and EVP_MD_CTX_reset() should be called instead to reinitialise an already created structure. 2) For consistency with the majority of our object creators and destructors, EVP_MD_CTX_(create|destroy) were renamed to EVP_MD_CTX_(new|free). The old names are retained as macros for deprecated builds. [Richard Levitte] *) Added ASYNC support. Libcrypto now includes the async sub-library to enable cryptographic operations to be performed asynchronously as long as an asynchronous capable engine is used. See the ASYNC_start_job() man page for further details. Libssl has also had this capability integrated with the introduction of the new mode SSL_MODE_ASYNC and associated error SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man pages. This work was developed in partnership with Intel Corp. [Matt Caswell] *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is always enabled now. If you want to disable the support you should exclude it using the list of supported ciphers. This also means that the "-no_ecdhe" option has been removed from s_server. [Kurt Roeckx] *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls SSL_{CTX_}set1_curves() which can set a list. [Kurt Roeckx] *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the curve you want to support using SSL_{CTX_}set1_curves(). [Kurt Roeckx] *) State machine rewrite. The state machine code has been significantly refactored in order to remove much duplication of code and solve issues with the old code (see ssl/statem/README for further details). This change does have some associated API changes. Notably the SSL_state() function has been removed and replaced by SSL_get_state which now returns an "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed altogether. The previous handshake states defined in ssl.h and ssl3.h have also been removed. [Matt Caswell] *) All instances of the string "ssleay" in the public API were replaced with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's) Some error codes related to internal RSA_eay API's were renamed. [Rich Salz] *) The demo files in crypto/threads were moved to demo/threads. [Rich Salz] *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp, sureware and ubsec. [Matt Caswell, Rich Salz] *) New ASN.1 embed macro. New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the structure is not allocated: it is part of the parent. That is instead of FOO *x; it must be: FOO x; This reduces memory fragmentation and make it impossible to accidentally set a mandatory field to NULL. This currently only works for some fields specifically a SEQUENCE, CHOICE, or ASN1_STRING type which is part of a parent SEQUENCE. Since it is equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or SEQUENCE OF. [Steve Henson] *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled. [Emilia K��sper] *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add DES and RC4 ciphersuites. [Matt Caswell] *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs. This changes the decoding behaviour for some invalid messages, though the change is mostly in the more lenient direction, and legacy behaviour is preserved as much as possible. [Emilia K��sper] *) Fix no-stdio build. [ David Woodhouse <David.Woodhouse@intel.com> and also Ivan Nestlerode <ivan.nestlerode@sonos.com> ] *) New testing framework The testing framework has been largely rewritten and is now using perl and the perl modules Test::Harness and an extended variant of Test::More called OpenSSL::Test to do its work. All test scripts in test/ have been rewritten into test recipes, and all direct calls to executables in test/Makefile have become individual recipes using the simplified testing OpenSSL::Test::Simple. For documentation on our testing modules, do: perldoc test/testlib/OpenSSL/Test/Simple.pm perldoc test/testlib/OpenSSL/Test.pm [Richard Levitte] *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT are used; the latter aborts on memory leaks (usually checked on exit). Some undocumented "set malloc, etc., hooks" functions were removed and others were changed. All are now documented. [Rich Salz] *) In DSA_generate_parameters_ex, if the provided seed is too short, return an error [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>] *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites from RFC4279, RFC4785, RFC5487, RFC5489. Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the original RSA_PSK patch. [Steve Henson] *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay era flag was never set throughout the codebase (only read). Also removed SSL3_FLAGS_POP_BUFFER which was only used if SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set. [Matt Caswell] *) Changed the default name options in the "ca", "crl", "req" and "x509" to be "oneline" instead of "compat". [Richard Levitte] *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're not aware of clients that still exhibit this bug, and the workaround hasn't been working properly for a while. [Emilia K��sper] *) The return type of BIO_number_read() and BIO_number_written() as well as the corresponding num_read and num_write members in the BIO structure has changed from unsigned long to uint64_t. On platforms where an unsigned long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is transferred. [Matt Caswell] *) Given the pervasive nature of TLS extensions it is inadvisable to run OpenSSL without support for them. It also means that maintaining the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed. [Matt Caswell] *) Removed support for the two export grade static DH ciphersuites EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites were newly added (along with a number of other static DH ciphersuites) to 1.0.2. However the two export ones have *never* worked since they were introduced. It seems strange in any case to be adding new export ciphersuites, and given "logjam" it also does not seem correct to fix them. [Matt Caswell] *) Version negotiation has been rewritten. In particular SSLv23_method(), SSLv23_client_method() and SSLv23_server_method() have been deprecated, and turned into macros which simply call the new preferred function names TLS_method(), TLS_client_method() and TLS_server_method(). All new code should use the new names instead. Also as part of this change the ssl23.h header file has been removed. [Matt Caswell] *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This code and the associated standard is no longer considered fit-for-purpose. [Matt Caswell] *) RT2547 was closed. When generating a private key, try to make the output file readable only by the owner. This behavior change might be noticeable when interacting with other software. *) Documented all exdata functions. Added CRYPTO_free_ex_index. Added a test. [Rich Salz] *) Added HTTP GET support to the ocsp command. [Rich Salz] *) Changed default digest for the dgst and enc commands from MD5 to sha256 [Rich Salz] *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead. [Matt Caswell] *) Added support for TLS extended master secret from draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an initial patch which was a great help during development. [Steve Henson] *) All libssl internal structures have been removed from the public header files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is now redundant). Users should not attempt to access internal structures directly. Instead they should use the provided API functions. [Matt Caswell] *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used. Access to deprecated functions can be re-enabled by running config with "enable-deprecated". In addition applications wishing to use deprecated functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour will, by default, disable some transitive includes that previously existed in the header files (e.g. ec.h will no longer, by default, include bn.h) [Matt Caswell] *) Added support for OCB mode. OpenSSL has been granted a patent license compatible with the OpenSSL license for use of OCB. Details are available at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support for OCB can be removed by calling config with no-ocb. [Matt Caswell] *) SSLv2 support has been removed. It still supports receiving a SSLv2 compatible client hello. [Kurt Roeckx] *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz], done while fixing the error code for the key-too-small case. [Annie Yousar <a.yousar@informatik.hu-berlin.de>] *) CA.sh has been removed; use CA.pl instead. [Rich Salz] *) Removed old DES API. [Rich Salz] *) Remove various unsupported platforms: Sony NEWS4 BEOS and BEOS_R5 NeXT SUNOS MPE/iX Sinix/ReliantUNIX RM400 DGUX NCR Tandem Cray 16-bit platforms such as WIN16 [Rich Salz] *) Clean up OPENSSL_NO_xxx #define's Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY Remove MS_STATIC; it's a relic from platforms <32 bits. [Rich Salz] *) Cleaned up dead code Remove all but one '#ifdef undef' which is to be looked at. [Rich Salz] *) Clean up calling of xxx_free routines. Just like free(), fix most of the xxx_free routines to accept NULL. Remove the non-null checks from callers. Save much code. [Rich Salz] *) Add secure heap for storage of private keys (when possible). Add BIO_s_secmem(), CBIGNUM, etc. Contributed by Akamai Technologies under our Corporate CLA. [Rich Salz] *) Experimental support for a new, fast, unbiased prime candidate generator, bn_probable_prime_dh_coprime(). Not currently used by any prime generator. [Felix Laurie von Massenbach <felix@erbridge.co.uk>] *) New output format NSS in the sess_id command line tool. This allows exporting the session id and the master key in NSS keylog format. [Martin Kaiser <martin@kaiser.cx>] *) Harmonize version and its documentation. -f flag is used to display compilation flags. [mancha <mancha1@zoho.com>] *) Fix eckey_priv_encode so it immediately returns an error upon a failure in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue. [mancha <mancha1@zoho.com>] *) Fix some double frees. These are not thought to be exploitable. [mancha <mancha1@zoho.com>] *) A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for preparing the fix (CVE-2014-0160) [Adam Langley, Bodo Moeller] *) Fix for the attack described in the paper "Recovering OpenSSL ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack" by Yuval Yarom and Naomi Benger. Details can be obtained from: http://eprint.iacr.org/2014/140 Thanks to Yuval Yarom and Naomi Benger for discovering this flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076) [Yuval Yarom and Naomi Benger] *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file(): this fixes a limitation in previous versions of OpenSSL. [Steve Henson] *) Experimental encrypt-then-mac support. Experimental support for encrypt then mac from draft-gutmann-tls-encrypt-then-mac-02.txt To enable it set the appropriate extension number (0x42 for the test server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42 For non-compliant peers (i.e. just about everything) this should have no effect. WARNING: EXPERIMENTAL, SUBJECT TO CHANGE. [Steve Henson] *) Add EVP support for key wrapping algorithms, to avoid problems with existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap algorithms and include tests cases. [Steve Henson] *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for enveloped data. [Steve Henson] *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest, MGF1 digest and OAEP label. [Steve Henson] *) Make openssl verify return errors. [Chris Palmer <palmer@google.com> and Ben Laurie] *) New function ASN1_TIME_diff to calculate the difference between two ASN1_TIME structures or one structure and the current time. [Steve Henson] *) Update fips_test_suite to support multiple command line options. New test to induce all self test errors in sequence and check expected failures. [Steve Henson] *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and sign or verify all in one operation. [Steve Henson] *) Add fips_algvs: a multicall fips utility incorporating all the algorithm test programs and fips_test_suite. Includes functionality to parse the minimal script output of fipsalgest.pl directly. [Steve Henson] *) Add authorisation parameter to FIPS_module_mode_set(). [Steve Henson] *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves. [Steve Henson] *) Use separate DRBG fields for internal and external flags. New function FIPS_drbg_health_check() to perform on demand health checking. Add generation tests to fips_test_suite with reduced health check interval to demonstrate periodic health checking. Add "nodh" option to fips_test_suite to skip very slow DH test. [Steve Henson] *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers based on NID. [Steve Henson] *) More extensive health check for DRBG checking many more failure modes. New function FIPS_selftest_drbg_all() to handle every possible DRBG combination: call this in fips_test_suite. [Steve Henson] *) Add support for canonical generation of DSA parameter 'g'. See FIPS 186-3 A.2.3. *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and POST to handle HMAC cases. [Steve Henson] *) Add functions FIPS_module_version() and FIPS_module_version_text() to return numerical and string versions of the FIPS module number. [Steve Henson] *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented outside the validated module in the FIPS capable OpenSSL. [Steve Henson] *) Minor change to DRBG entropy callback semantics. In some cases there is no multiple of the block length between min_len and max_len. Allow the callback to return more than max_len bytes of entropy but discard any extra: it is the callback's responsibility to ensure that the extra data discarded does not impact the requested amount of entropy. [Steve Henson] *) Add PRNG security strength checks to RSA, DSA and ECDSA using information in FIPS186-3, SP800-57 and SP800-131A. [Steve Henson] *) CCM support via EVP. Interface is very similar to GCM case except we must supply all data in one chunk (i.e. no update, final) and the message length must be supplied if AAD is used. Add algorithm test support. [Steve Henson] *) Initial version of POST overhaul. Add POST callback to allow the status of POST to be monitored and/or failures induced. Modify fips_test_suite to use callback. Always run all selftests even if one fails. [Steve Henson] *) XTS support including algorithm test driver in the fips_gcmtest program. Note: this does increase the maximum key length from 32 to 64 bytes but there should be no binary compatibility issues as existing applications will never use XTS mode. [Steve Henson] *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies to OpenSSL RAND code and replace with a tiny FIPS RAND API which also performs algorithm blocking for unapproved PRNG types. Also do not set PRNG type in FIPS_mode_set(): leave this to the application. Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with the standard OpenSSL PRNG: set additional data to a date time vector. [Steve Henson] *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*. This shouldn't present any incompatibility problems because applications shouldn't be using these directly and any that are will need to rethink anyway as the X9.31 PRNG is now deprecated by FIPS 140-2 [Steve Henson] *) Extensive self tests and health checking required by SP800-90 DRBG. Remove strength parameter from FIPS_drbg_instantiate and always instantiate at maximum supported strength. [Steve Henson] *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing. [Steve Henson] *) New algorithm test program fips_dhvs to handle DH primitives only testing. [Steve Henson] *) New function DH_compute_key_padded() to compute a DH key and pad with leading zeroes if needed: this complies with SP800-56A et al. [Steve Henson] *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by anything, incomplete, subject to change and largely untested at present. [Steve Henson] *) Modify fipscanisteronly build option to only build the necessary object files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile. [Steve Henson] *) Add experimental option FIPSSYMS to give all symbols in fipscanister.o and FIPS or fips prefix. This will avoid conflicts with future versions of OpenSSL. Add perl script util/fipsas.pl to preprocess assembly language source files and rename any affected symbols. [Steve Henson] *) Add selftest checks and algorithm block of non-fips algorithms in FIPS mode. Remove DES2 from selftests. [Steve Henson] *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just return internal method without any ENGINE dependencies. Add new tiny fips sign and verify functions. [Steve Henson] *) New build option no-ec2m to disable characteristic 2 code. [Steve Henson] *) New build option "fipscanisteronly". This only builds fipscanister.o and (currently) associated fips utilities. Uses the file Makefile.fips instead of Makefile.org as the prototype. [Steve Henson] *) Add some FIPS mode restrictions to GCM. Add internal IV generator. Update fips_gcmtest to use IV generator. [Steve Henson] *) Initial, experimental EVP support for AES-GCM. AAD can be input by setting output buffer to NULL. The *Final function must be called although it will not retrieve any additional data. The tag can be set or retrieved with a ctrl. The IV length is by default 12 bytes (96 bits) but can be set to an alternative value. If the IV length exceeds the maximum IV length (currently 16 bytes) it cannot be set before the key. [Steve Henson] *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the underlying do_cipher function handles all cipher semantics itself including padding and finalisation. This is useful if (for example) an ENGINE cipher handles block padding itself. The behaviour of do_cipher is subtly changed if this flag is set: the return value is the number of characters written to the output buffer (zero is no longer an error code) or a negative error code. Also if the input buffer is NULL and length 0 finalisation should be performed. [Steve Henson] *) If a candidate issuer certificate is already part of the constructed path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case. [Steve Henson] *) Improve forward-security support: add functions void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure)) void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure)) for use by SSL/TLS servers; the callback function will be called whenever a new session is created, and gets to decide whether the session may be cached to make it resumable (return 0) or not (return 1). (As by the SSL/TLS protocol specifications, the session_id sent by the server will be empty to indicate that the session is not resumable; also, the server will not generate RFC 4507 (RFC 5077) session tickets.) A simple reasonable callback implementation is to return is_forward_secure. This parameter will be set to 1 or 0 depending on the ciphersuite selected by the SSL/TLS server library, indicating whether it can provide forward security. [Emilia K��sper <emilia.kasper@esat.kuleuven.be> (Google)] *) New -verify_name option in command line utilities to set verification parameters by name. [Steve Henson] *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE. Add CMAC pkey methods. [Steve Henson] *) Experimental renegotiation in s_server -www mode. If the client browses /reneg connection is renegotiated. If /renegcert it is renegotiated requesting a certificate. [Steve Henson] *) Add an "external" session cache for debugging purposes to s_server. This should help trace issues which normally are only apparent in deployed multi-process servers. [Steve Henson] *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where return value is ignored. NB. The functions RAND_add(), RAND_seed(), BIO_set_cipher() and some obscure PEM functions were changed so they can now return an error. The RAND changes required a change to the RAND_METHOD structure. [Steve Henson] *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of a gcc attribute to warn if the result of a function is ignored. This is enable if DEBUG_UNUSED is set. Add to several functions in evp.h whose return value is often ignored. [Steve Henson] *) New -noct, -requestct, -requirect and -ctlogfile options for s_client. These allow SCTs (signed certificate timestamps) to be requested and validated when establishing a connection. [Rob Percival <robpercival@google.com>] |
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