1/* 2 * Copyright (C) 2013 University of Szeged 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY UNIVERSITY OF SZEGED ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27 28#if USE(CURL) 29 30#include "SSLHandle.h" 31 32#include "ResourceHandleInternal.h" 33 34#include <openssl/pem.h> 35#include <openssl/ssl.h> 36#include <openssl/x509_vfy.h> 37#include <wtf/ListHashSet.h> 38#include <wtf/text/CString.h> 39 40namespace WebCore { 41 42typedef std::tuple<WTF::String, WTF::String> clientCertificate; 43static HashMap<String, ListHashSet<String>> allowedHosts; 44static HashMap<String, clientCertificate> allowedClientHosts; 45 46void allowsAnyHTTPSCertificateHosts(const String& host) 47{ 48 ListHashSet<String> certificates; 49 allowedHosts.set(host, certificates); 50} 51 52void addAllowedClientCertificate(const String& host, const String& certificate, const String& key) 53{ 54 clientCertificate clientInfo(certificate, key); 55 allowedClientHosts.set(host.lower(), clientInfo); 56} 57 58void setSSLClientCertificate(ResourceHandle* handle) 59{ 60 String host = handle->firstRequest().url().host(); 61 HashMap<String, clientCertificate>::iterator it = allowedClientHosts.find(host.lower()); 62 if (it == allowedClientHosts.end()) 63 return; 64 65 ResourceHandleInternal* d = handle->getInternal(); 66 clientCertificate clientInfo = it->value; 67 curl_easy_setopt(d->m_handle, CURLOPT_SSLCERT, std::get<0>(clientInfo).utf8().data()); 68 curl_easy_setopt(d->m_handle, CURLOPT_SSLCERTTYPE, "P12"); 69 curl_easy_setopt(d->m_handle, CURLOPT_SSLCERTPASSWD, std::get<1>(clientInfo).utf8().data()); 70} 71 72bool sslIgnoreHTTPSCertificate(const String& host, const ListHashSet<String>& certificates) 73{ 74 HashMap<String, ListHashSet<String>>::iterator it = allowedHosts.find(host); 75 if (it != allowedHosts.end()) { 76 if ((it->value).isEmpty()) { 77 it->value = certificates; 78 return true; 79 } 80 if (certificates.size() != it->value.size()) 81 return false; 82 ListHashSet<String>::const_iterator certsIter = certificates.begin(); 83 ListHashSet<String>::iterator valueIter = (it->value).begin(); 84 for (; valueIter != (it->value).end(); ++valueIter, ++certsIter) { 85 if (*certsIter != *valueIter) 86 return false; 87 } 88 return true; 89 } 90 return false; 91} 92 93unsigned sslCertificateFlag(const unsigned& sslError) 94{ 95 switch (sslError) { 96 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT : // the issuer certificate could not be found: this occurs if the issuer certificate of an untrusted certificate cannot be found. 97 case X509_V_ERR_UNABLE_TO_GET_CRL : // the CRL of a certificate could not be found. 98 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY : // the issuer certificate of a locally looked up certificate could not be found. This normally means the list of trusted certificates is not complete. 99 return SSL_CERTIFICATE_UNKNOWN_CA; 100 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE : // the certificate signature could not be decrypted. This means that the actual signature value could not be determined rather than it not matching the expected value, this is only meaningful for RSA keys. 101 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE : // the CRL signature could not be decrypted: this means that the actual signature value could not be determined rather than it not matching the expected value. Unused. 102 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY : // the public key in the certificate SubjectPublicKeyInfo could not be read. 103 case X509_V_ERR_CERT_SIGNATURE_FAILURE : // the signature of the certificate is invalid. 104 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT : // the passed certificate is self signed and the same certificate cannot be found in the list of trusted certificates. 105 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN : // the certificate chain could be built up using the untrusted certificates but the root could not be found locally. 106 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE : // no signatures could be verified because the chain contains only one certificate and it is not self signed. 107 case X509_V_ERR_INVALID_PURPOSE : // the supplied certificate cannot be used for the specified purpose. 108 case X509_V_ERR_CERT_UNTRUSTED : // the root CA is not marked as trusted for the specified purpose. 109 case X509_V_ERR_CERT_REJECTED : // the root CA is marked to reject the specified purpose. 110 case X509_V_ERR_NO_EXPLICIT_POLICY : // the verification flags were set to require and explicit policy but none was present. 111 case X509_V_ERR_DIFFERENT_CRL_SCOPE : // the only CRLs that could be found did not match the scope of the certificate. 112 return SSL_CERTIFICATE_INSECURE; 113 case X509_V_ERR_CERT_NOT_YET_VALID : // the certificate is not yet valid: the notBefore date is after the current time. 114 case X509_V_ERR_CRL_NOT_YET_VALID : // the CRL is not yet valid. 115 return SSL_CERTIFICATE_NOT_ACTIVATED; 116 case X509_V_ERR_CERT_HAS_EXPIRED : // the certificate has expired: that is the notAfter date is before the current time. 117 case X509_V_ERR_CRL_HAS_EXPIRED : // the CRL has expired. 118 return SSL_CERTIFICATE_EXPIRED; 119 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD : // the certificate notBefore field contains an invalid time. 120 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD : // the certificate notAfter field contains an invalid time. 121 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD : // the CRL lastUpdate field contains an invalid time. 122 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD : // the CRL nextUpdate field contains an invalid time. 123 case X509_V_ERR_OUT_OF_MEM : // an error occurred trying to allocate memory. This should never happen. 124 case X509_V_ERR_CERT_CHAIN_TOO_LONG : // the certificate chain length is greater than the supplied maximum depth. Unused. 125 case X509_V_ERR_PATH_LENGTH_EXCEEDED : // the basicConstraints pathlength parameter has been exceeded. 126 case X509_V_ERR_INVALID_EXTENSION : // a certificate extension had an invalid value (for example an incorrect encoding) or some value inconsistent with other extensions. 127 case X509_V_ERR_INVALID_POLICY_EXTENSION : // a certificate policies extension had an invalid value (for example an incorrect encoding) or some value inconsistent with other extensions. This error only occurs if policy processing is enabled. 128 case X509_V_ERR_UNSUPPORTED_EXTENSION_FEATURE : // some feature of a certificate extension is not supported. Unused. 129 case X509_V_ERR_PERMITTED_VIOLATION : // a name constraint violation occured in the permitted subtrees. 130 case X509_V_ERR_EXCLUDED_VIOLATION : // a name constraint violation occured in the excluded subtrees. 131 case X509_V_ERR_SUBTREE_MINMAX : // a certificate name constraints extension included a minimum or maximum field: this is not supported. 132 case X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE : // an unsupported name constraint type was encountered. OpenSSL currently only supports directory name, DNS name, email and URI types. 133 case X509_V_ERR_UNSUPPORTED_CONSTRAINT_SYNTAX : // the format of the name constraint is not recognised: for example an email address format of a form not mentioned in RFC3280. This could be caused by a garbage extension or some new feature not currently supported. 134 case X509_V_ERR_CRL_PATH_VALIDATION_ERROR : // an error occured when attempting to verify the CRL path. This error can only happen if extended CRL checking is enabled. 135 case X509_V_ERR_APPLICATION_VERIFICATION : // an application specific error. This will never be returned unless explicitly set by an application. 136 return SSL_CERTIFICATE_GENERIC_ERROR; 137 case X509_V_ERR_CERT_REVOKED : // the certificate has been revoked. 138 return SSL_CERTIFICATE_REVOKED; 139 case X509_V_ERR_INVALID_CA : // a CA certificate is invalid. Either it is not a CA or its extensions are not consistent with the supplied purpose. 140 case X509_V_ERR_SUBJECT_ISSUER_MISMATCH : // the current candidate issuer certificate was rejected because its subject name did not match the issuer name of the current certificate. This is only set if issuer check debugging is enabled it is used for status notification and is not in itself an error. 141 case X509_V_ERR_AKID_SKID_MISMATCH : // the current candidate issuer certificate was rejected because its subject key identifier was present and did not match the authority key identifier current certificate. This is only set if issuer check debugging is enabled it is used for status notification and is not in itself an error. 142 case X509_V_ERR_AKID_ISSUER_SERIAL_MISMATCH : // the current candidate issuer certificate was rejected because its issuer name and serial number was present and did not match the authority key identifier of the current certificate. This is only set if issuer check debugging is enabled it is used for status notification and is not in itself an error. 143 case X509_V_ERR_KEYUSAGE_NO_CERTSIGN : // the current candidate issuer certificate was rejected because its keyUsage extension does not permit certificate signing. This is only set if issuer check debugging is enabled it is used for status notification and is not in itself an error. 144 return SSL_CERTIFICATE_BAD_IDENTITY; 145 default : 146 return SSL_CERTIFICATE_GENERIC_ERROR; 147 } 148} 149 150#if !PLATFORM(WIN) 151// success of certificates extraction 152bool pemData(X509_STORE_CTX* ctx, ListHashSet<String>& certificates) 153{ 154 bool ok = true; 155 STACK_OF(X509)* certs = X509_STORE_CTX_get1_chain(ctx); 156 for (int i = 0; i < sk_X509_num(certs); i++) { 157 X509* uCert = sk_X509_value(certs, i); 158 BIO* bio = BIO_new(BIO_s_mem()); 159 int res = PEM_write_bio_X509(bio, uCert); 160 if (!res) { 161 ok = false; 162 BIO_free(bio); 163 break; 164 } 165 166 unsigned char* certificateData; 167 long length = BIO_get_mem_data(bio, &certificateData); 168 if (length < 0) { 169 ok = false; 170 BIO_free(bio); 171 break; 172 } 173 174 certificateData[length] = '\0'; 175 String certificate = certificateData; 176 certificates.add(certificate); 177 BIO_free(bio); 178 } 179 sk_X509_pop_free(certs, X509_free); 180 return ok; 181} 182#endif 183 184static int certVerifyCallback(int ok, X509_STORE_CTX* ctx) 185{ 186 // whether the verification of the certificate in question was passed (preverify_ok=1) or not (preverify_ok=0) 187 188 unsigned err = X509_STORE_CTX_get_error(ctx); 189 if (!err) 190 return 1; 191 192 SSL* ssl = reinterpret_cast<SSL*>(X509_STORE_CTX_get_ex_data(ctx, SSL_get_ex_data_X509_STORE_CTX_idx())); 193 SSL_CTX* sslctx = SSL_get_SSL_CTX(ssl); 194 ResourceHandle* job = reinterpret_cast<ResourceHandle*>(SSL_CTX_get_app_data(sslctx)); 195 String host = job->firstRequest().url().host(); 196 ResourceHandleInternal* d = job->getInternal(); 197 198 d->m_sslErrors = sslCertificateFlag(err); 199 200#if PLATFORM(WIN) 201 HashMap<String, ListHashSet<String>>::iterator it = allowedHosts.find(host); 202 ok = (it != allowedHosts.end()); 203#else 204 ListHashSet<String> certificates; 205 if (!pemData(ctx, certificates)) 206 return 0; 207 ok = sslIgnoreHTTPSCertificate(host.lower(), certificates); 208#endif 209 210 if (ok) { 211 // if the host and the certificate are stored for the current handle that means is enabled, 212 // so don't need to curl verifies the authenticity of the peer's certificate 213 curl_easy_setopt(d->m_handle, CURLOPT_SSL_VERIFYPEER, false); 214 } 215 return ok; 216} 217 218static CURLcode sslctxfun(CURL* curl, void* sslctx, void* parm) 219{ 220 SSL_CTX_set_app_data(reinterpret_cast<SSL_CTX*>(sslctx), parm); 221 SSL_CTX_set_verify(reinterpret_cast<SSL_CTX*>(sslctx), SSL_VERIFY_PEER, certVerifyCallback); 222 return CURLE_OK; 223} 224 225void setSSLVerifyOptions(ResourceHandle* handle) 226{ 227 ResourceHandleInternal* d = handle->getInternal(); 228 curl_easy_setopt(d->m_handle, CURLOPT_SSL_CTX_DATA, handle); 229 curl_easy_setopt(d->m_handle, CURLOPT_SSL_CTX_FUNCTION, sslctxfun); 230} 231 232} 233 234#endif 235