1189251Ssam/* 2214734Srpaulo * SSL/TLS interface definition 3214734Srpaulo * Copyright (c) 2004-2010, Jouni Malinen <j@w1.fi> 4189251Ssam * 5252726Srpaulo * This software may be distributed under the terms of the BSD license. 6252726Srpaulo * See README for more details. 7189251Ssam */ 8189251Ssam 9189251Ssam#ifndef TLS_H 10189251Ssam#define TLS_H 11189251Ssam 12189251Ssamstruct tls_connection; 13189251Ssam 14189251Ssamstruct tls_keys { 15189251Ssam const u8 *master_key; /* TLS master secret */ 16189251Ssam size_t master_key_len; 17189251Ssam const u8 *client_random; 18189251Ssam size_t client_random_len; 19189251Ssam const u8 *server_random; 20189251Ssam size_t server_random_len; 21189251Ssam}; 22189251Ssam 23214734Srpauloenum tls_event { 24252726Srpaulo TLS_CERT_CHAIN_SUCCESS, 25214734Srpaulo TLS_CERT_CHAIN_FAILURE, 26252726Srpaulo TLS_PEER_CERTIFICATE, 27252726Srpaulo TLS_ALERT 28214734Srpaulo}; 29214734Srpaulo 30214734Srpaulo/* 31214734Srpaulo * Note: These are used as identifier with external programs and as such, the 32214734Srpaulo * values must not be changed. 33214734Srpaulo */ 34214734Srpauloenum tls_fail_reason { 35214734Srpaulo TLS_FAIL_UNSPECIFIED = 0, 36214734Srpaulo TLS_FAIL_UNTRUSTED = 1, 37214734Srpaulo TLS_FAIL_REVOKED = 2, 38214734Srpaulo TLS_FAIL_NOT_YET_VALID = 3, 39214734Srpaulo TLS_FAIL_EXPIRED = 4, 40214734Srpaulo TLS_FAIL_SUBJECT_MISMATCH = 5, 41214734Srpaulo TLS_FAIL_ALTSUBJECT_MISMATCH = 6, 42214734Srpaulo TLS_FAIL_BAD_CERTIFICATE = 7, 43214734Srpaulo TLS_FAIL_SERVER_CHAIN_PROBE = 8 44214734Srpaulo}; 45214734Srpaulo 46214734Srpaulounion tls_event_data { 47214734Srpaulo struct { 48214734Srpaulo int depth; 49214734Srpaulo const char *subject; 50214734Srpaulo enum tls_fail_reason reason; 51214734Srpaulo const char *reason_txt; 52214734Srpaulo const struct wpabuf *cert; 53214734Srpaulo } cert_fail; 54214734Srpaulo 55214734Srpaulo struct { 56214734Srpaulo int depth; 57214734Srpaulo const char *subject; 58214734Srpaulo const struct wpabuf *cert; 59214734Srpaulo const u8 *hash; 60214734Srpaulo size_t hash_len; 61214734Srpaulo } peer_cert; 62252726Srpaulo 63252726Srpaulo struct { 64252726Srpaulo int is_local; 65252726Srpaulo const char *type; 66252726Srpaulo const char *description; 67252726Srpaulo } alert; 68214734Srpaulo}; 69214734Srpaulo 70189251Ssamstruct tls_config { 71189251Ssam const char *opensc_engine_path; 72189251Ssam const char *pkcs11_engine_path; 73189251Ssam const char *pkcs11_module_path; 74214734Srpaulo int fips_mode; 75252726Srpaulo int cert_in_cb; 76214734Srpaulo 77214734Srpaulo void (*event_cb)(void *ctx, enum tls_event ev, 78214734Srpaulo union tls_event_data *data); 79214734Srpaulo void *cb_ctx; 80189251Ssam}; 81189251Ssam 82209158Srpaulo#define TLS_CONN_ALLOW_SIGN_RSA_MD5 BIT(0) 83209158Srpaulo#define TLS_CONN_DISABLE_TIME_CHECKS BIT(1) 84252726Srpaulo#define TLS_CONN_DISABLE_SESSION_TICKET BIT(2) 85209158Srpaulo 86189251Ssam/** 87189251Ssam * struct tls_connection_params - Parameters for TLS connection 88189251Ssam * @ca_cert: File or reference name for CA X.509 certificate in PEM or DER 89189251Ssam * format 90189251Ssam * @ca_cert_blob: ca_cert as inlined data or %NULL if not used 91189251Ssam * @ca_cert_blob_len: ca_cert_blob length 92189251Ssam * @ca_path: Path to CA certificates (OpenSSL specific) 93189251Ssam * @subject_match: String to match in the subject of the peer certificate or 94189251Ssam * %NULL to allow all subjects 95189251Ssam * @altsubject_match: String to match in the alternative subject of the peer 96189251Ssam * certificate or %NULL to allow all alternative subjects 97189251Ssam * @client_cert: File or reference name for client X.509 certificate in PEM or 98189251Ssam * DER format 99189251Ssam * @client_cert_blob: client_cert as inlined data or %NULL if not used 100189251Ssam * @client_cert_blob_len: client_cert_blob length 101189251Ssam * @private_key: File or reference name for client private key in PEM or DER 102189251Ssam * format (traditional format (RSA PRIVATE KEY) or PKCS#8 (PRIVATE KEY) 103189251Ssam * @private_key_blob: private_key as inlined data or %NULL if not used 104189251Ssam * @private_key_blob_len: private_key_blob length 105189251Ssam * @private_key_passwd: Passphrase for decrypted private key, %NULL if no 106189251Ssam * passphrase is used. 107189251Ssam * @dh_file: File name for DH/DSA data in PEM format, or %NULL if not used 108189251Ssam * @dh_blob: dh_file as inlined data or %NULL if not used 109189251Ssam * @dh_blob_len: dh_blob length 110189251Ssam * @engine: 1 = use engine (e.g., a smartcard) for private key operations 111189251Ssam * (this is OpenSSL specific for now) 112189251Ssam * @engine_id: engine id string (this is OpenSSL specific for now) 113189251Ssam * @ppin: pointer to the pin variable in the configuration 114189251Ssam * (this is OpenSSL specific for now) 115189251Ssam * @key_id: the private key's id when using engine (this is OpenSSL 116189251Ssam * specific for now) 117189251Ssam * @cert_id: the certificate's id when using engine 118189251Ssam * @ca_cert_id: the CA certificate's id when using engine 119209158Srpaulo * @flags: Parameter options (TLS_CONN_*) 120189251Ssam * 121189251Ssam * TLS connection parameters to be configured with tls_connection_set_params() 122189251Ssam * and tls_global_set_params(). 123189251Ssam * 124189251Ssam * Certificates and private key can be configured either as a reference name 125189251Ssam * (file path or reference to certificate store) or by providing the same data 126189251Ssam * as a pointer to the data in memory. Only one option will be used for each 127189251Ssam * field. 128189251Ssam */ 129189251Ssamstruct tls_connection_params { 130189251Ssam const char *ca_cert; 131189251Ssam const u8 *ca_cert_blob; 132189251Ssam size_t ca_cert_blob_len; 133189251Ssam const char *ca_path; 134189251Ssam const char *subject_match; 135189251Ssam const char *altsubject_match; 136189251Ssam const char *client_cert; 137189251Ssam const u8 *client_cert_blob; 138189251Ssam size_t client_cert_blob_len; 139189251Ssam const char *private_key; 140189251Ssam const u8 *private_key_blob; 141189251Ssam size_t private_key_blob_len; 142189251Ssam const char *private_key_passwd; 143189251Ssam const char *dh_file; 144189251Ssam const u8 *dh_blob; 145189251Ssam size_t dh_blob_len; 146189251Ssam 147189251Ssam /* OpenSSL specific variables */ 148189251Ssam int engine; 149189251Ssam const char *engine_id; 150189251Ssam const char *pin; 151189251Ssam const char *key_id; 152189251Ssam const char *cert_id; 153189251Ssam const char *ca_cert_id; 154209158Srpaulo 155209158Srpaulo unsigned int flags; 156189251Ssam}; 157189251Ssam 158189251Ssam 159189251Ssam/** 160189251Ssam * tls_init - Initialize TLS library 161189251Ssam * @conf: Configuration data for TLS library 162189251Ssam * Returns: Context data to be used as tls_ctx in calls to other functions, 163189251Ssam * or %NULL on failure. 164189251Ssam * 165189251Ssam * Called once during program startup and once for each RSN pre-authentication 166189251Ssam * session. In other words, there can be two concurrent TLS contexts. If global 167189251Ssam * library initialization is needed (i.e., one that is shared between both 168189251Ssam * authentication types), the TLS library wrapper should maintain a reference 169189251Ssam * counter and do global initialization only when moving from 0 to 1 reference. 170189251Ssam */ 171189251Ssamvoid * tls_init(const struct tls_config *conf); 172189251Ssam 173189251Ssam/** 174189251Ssam * tls_deinit - Deinitialize TLS library 175189251Ssam * @tls_ctx: TLS context data from tls_init() 176189251Ssam * 177189251Ssam * Called once during program shutdown and once for each RSN pre-authentication 178189251Ssam * session. If global library deinitialization is needed (i.e., one that is 179189251Ssam * shared between both authentication types), the TLS library wrapper should 180189251Ssam * maintain a reference counter and do global deinitialization only when moving 181189251Ssam * from 1 to 0 references. 182189251Ssam */ 183189251Ssamvoid tls_deinit(void *tls_ctx); 184189251Ssam 185189251Ssam/** 186189251Ssam * tls_get_errors - Process pending errors 187189251Ssam * @tls_ctx: TLS context data from tls_init() 188189251Ssam * Returns: Number of found error, 0 if no errors detected. 189189251Ssam * 190189251Ssam * Process all pending TLS errors. 191189251Ssam */ 192189251Ssamint tls_get_errors(void *tls_ctx); 193189251Ssam 194189251Ssam/** 195189251Ssam * tls_connection_init - Initialize a new TLS connection 196189251Ssam * @tls_ctx: TLS context data from tls_init() 197189251Ssam * Returns: Connection context data, conn for other function calls 198189251Ssam */ 199189251Ssamstruct tls_connection * tls_connection_init(void *tls_ctx); 200189251Ssam 201189251Ssam/** 202189251Ssam * tls_connection_deinit - Free TLS connection data 203189251Ssam * @tls_ctx: TLS context data from tls_init() 204189251Ssam * @conn: Connection context data from tls_connection_init() 205189251Ssam * 206189251Ssam * Release all resources allocated for TLS connection. 207189251Ssam */ 208189251Ssamvoid tls_connection_deinit(void *tls_ctx, struct tls_connection *conn); 209189251Ssam 210189251Ssam/** 211189251Ssam * tls_connection_established - Has the TLS connection been completed? 212189251Ssam * @tls_ctx: TLS context data from tls_init() 213189251Ssam * @conn: Connection context data from tls_connection_init() 214189251Ssam * Returns: 1 if TLS connection has been completed, 0 if not. 215189251Ssam */ 216189251Ssamint tls_connection_established(void *tls_ctx, struct tls_connection *conn); 217189251Ssam 218189251Ssam/** 219189251Ssam * tls_connection_shutdown - Shutdown TLS connection 220189251Ssam * @tls_ctx: TLS context data from tls_init() 221189251Ssam * @conn: Connection context data from tls_connection_init() 222189251Ssam * Returns: 0 on success, -1 on failure 223189251Ssam * 224189251Ssam * Shutdown current TLS connection without releasing all resources. New 225189251Ssam * connection can be started by using the same conn without having to call 226189251Ssam * tls_connection_init() or setting certificates etc. again. The new 227189251Ssam * connection should try to use session resumption. 228189251Ssam */ 229189251Ssamint tls_connection_shutdown(void *tls_ctx, struct tls_connection *conn); 230189251Ssam 231189251Ssamenum { 232189251Ssam TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED = -3, 233189251Ssam TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED = -2 234189251Ssam}; 235189251Ssam 236189251Ssam/** 237189251Ssam * tls_connection_set_params - Set TLS connection parameters 238189251Ssam * @tls_ctx: TLS context data from tls_init() 239189251Ssam * @conn: Connection context data from tls_connection_init() 240189251Ssam * @params: Connection parameters 241189251Ssam * Returns: 0 on success, -1 on failure, 242189251Ssam * TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED (-2) on possible PIN error causing 243189251Ssam * PKCS#11 engine failure, or 244189251Ssam * TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED (-3) on failure to verify the 245189251Ssam * PKCS#11 engine private key. 246189251Ssam */ 247189251Ssamint __must_check 248189251Ssamtls_connection_set_params(void *tls_ctx, struct tls_connection *conn, 249189251Ssam const struct tls_connection_params *params); 250189251Ssam 251189251Ssam/** 252189251Ssam * tls_global_set_params - Set TLS parameters for all TLS connection 253189251Ssam * @tls_ctx: TLS context data from tls_init() 254189251Ssam * @params: Global TLS parameters 255189251Ssam * Returns: 0 on success, -1 on failure, 256189251Ssam * TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED (-2) on possible PIN error causing 257189251Ssam * PKCS#11 engine failure, or 258189251Ssam * TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED (-3) on failure to verify the 259189251Ssam * PKCS#11 engine private key. 260189251Ssam */ 261189251Ssamint __must_check tls_global_set_params( 262189251Ssam void *tls_ctx, const struct tls_connection_params *params); 263189251Ssam 264189251Ssam/** 265189251Ssam * tls_global_set_verify - Set global certificate verification options 266189251Ssam * @tls_ctx: TLS context data from tls_init() 267189251Ssam * @check_crl: 0 = do not verify CRLs, 1 = verify CRL for the user certificate, 268189251Ssam * 2 = verify CRL for all certificates 269189251Ssam * Returns: 0 on success, -1 on failure 270189251Ssam */ 271189251Ssamint __must_check tls_global_set_verify(void *tls_ctx, int check_crl); 272189251Ssam 273189251Ssam/** 274189251Ssam * tls_connection_set_verify - Set certificate verification options 275189251Ssam * @tls_ctx: TLS context data from tls_init() 276189251Ssam * @conn: Connection context data from tls_connection_init() 277189251Ssam * @verify_peer: 1 = verify peer certificate 278189251Ssam * Returns: 0 on success, -1 on failure 279189251Ssam */ 280189251Ssamint __must_check tls_connection_set_verify(void *tls_ctx, 281189251Ssam struct tls_connection *conn, 282189251Ssam int verify_peer); 283189251Ssam 284189251Ssam/** 285189251Ssam * tls_connection_get_keys - Get master key and random data from TLS connection 286189251Ssam * @tls_ctx: TLS context data from tls_init() 287189251Ssam * @conn: Connection context data from tls_connection_init() 288189251Ssam * @keys: Structure of key/random data (filled on success) 289189251Ssam * Returns: 0 on success, -1 on failure 290189251Ssam */ 291189251Ssamint __must_check tls_connection_get_keys(void *tls_ctx, 292189251Ssam struct tls_connection *conn, 293189251Ssam struct tls_keys *keys); 294189251Ssam 295189251Ssam/** 296189251Ssam * tls_connection_prf - Use TLS-PRF to derive keying material 297189251Ssam * @tls_ctx: TLS context data from tls_init() 298189251Ssam * @conn: Connection context data from tls_connection_init() 299189251Ssam * @label: Label (e.g., description of the key) for PRF 300189251Ssam * @server_random_first: seed is 0 = client_random|server_random, 301189251Ssam * 1 = server_random|client_random 302189251Ssam * @out: Buffer for output data from TLS-PRF 303189251Ssam * @out_len: Length of the output buffer 304189251Ssam * Returns: 0 on success, -1 on failure 305189251Ssam * 306189251Ssam * This function is optional to implement if tls_connection_get_keys() provides 307189251Ssam * access to master secret and server/client random values. If these values are 308189251Ssam * not exported from the TLS library, tls_connection_prf() is required so that 309189251Ssam * further keying material can be derived from the master secret. If not 310189251Ssam * implemented, the function will still need to be defined, but it can just 311252726Srpaulo * return -1. Example implementation of this function is in tls_prf_sha1_md5() 312189251Ssam * when it is called with seed set to client_random|server_random (or 313189251Ssam * server_random|client_random). 314189251Ssam */ 315189251Ssamint __must_check tls_connection_prf(void *tls_ctx, 316189251Ssam struct tls_connection *conn, 317189251Ssam const char *label, 318189251Ssam int server_random_first, 319189251Ssam u8 *out, size_t out_len); 320189251Ssam 321189251Ssam/** 322189251Ssam * tls_connection_handshake - Process TLS handshake (client side) 323189251Ssam * @tls_ctx: TLS context data from tls_init() 324189251Ssam * @conn: Connection context data from tls_connection_init() 325214734Srpaulo * @in_data: Input data from TLS server 326189251Ssam * @appl_data: Pointer to application data pointer, or %NULL if dropped 327214734Srpaulo * Returns: Output data, %NULL on failure 328189251Ssam * 329214734Srpaulo * The caller is responsible for freeing the returned output data. If the final 330189251Ssam * handshake message includes application data, this is decrypted and 331214734Srpaulo * appl_data (if not %NULL) is set to point this data. The caller is 332214734Srpaulo * responsible for freeing appl_data. 333189251Ssam * 334189251Ssam * This function is used during TLS handshake. The first call is done with 335189251Ssam * in_data == %NULL and the library is expected to return ClientHello packet. 336189251Ssam * This packet is then send to the server and a response from server is given 337189251Ssam * to TLS library by calling this function again with in_data pointing to the 338189251Ssam * TLS message from the server. 339189251Ssam * 340189251Ssam * If the TLS handshake fails, this function may return %NULL. However, if the 341189251Ssam * TLS library has a TLS alert to send out, that should be returned as the 342189251Ssam * output data. In this case, tls_connection_get_failed() must return failure 343189251Ssam * (> 0). 344189251Ssam * 345189251Ssam * tls_connection_established() should return 1 once the TLS handshake has been 346189251Ssam * completed successfully. 347189251Ssam */ 348214734Srpaulostruct wpabuf * tls_connection_handshake(void *tls_ctx, 349214734Srpaulo struct tls_connection *conn, 350214734Srpaulo const struct wpabuf *in_data, 351214734Srpaulo struct wpabuf **appl_data); 352189251Ssam 353252726Srpaulostruct wpabuf * tls_connection_handshake2(void *tls_ctx, 354252726Srpaulo struct tls_connection *conn, 355252726Srpaulo const struct wpabuf *in_data, 356252726Srpaulo struct wpabuf **appl_data, 357252726Srpaulo int *more_data_needed); 358252726Srpaulo 359189251Ssam/** 360189251Ssam * tls_connection_server_handshake - Process TLS handshake (server side) 361189251Ssam * @tls_ctx: TLS context data from tls_init() 362189251Ssam * @conn: Connection context data from tls_connection_init() 363189251Ssam * @in_data: Input data from TLS peer 364214734Srpaulo * @appl_data: Pointer to application data pointer, or %NULL if dropped 365214734Srpaulo * Returns: Output data, %NULL on failure 366189251Ssam * 367214734Srpaulo * The caller is responsible for freeing the returned output data. 368189251Ssam */ 369214734Srpaulostruct wpabuf * tls_connection_server_handshake(void *tls_ctx, 370214734Srpaulo struct tls_connection *conn, 371214734Srpaulo const struct wpabuf *in_data, 372214734Srpaulo struct wpabuf **appl_data); 373189251Ssam 374189251Ssam/** 375189251Ssam * tls_connection_encrypt - Encrypt data into TLS tunnel 376189251Ssam * @tls_ctx: TLS context data from tls_init() 377189251Ssam * @conn: Connection context data from tls_connection_init() 378214734Srpaulo * @in_data: Plaintext data to be encrypted 379214734Srpaulo * Returns: Encrypted TLS data or %NULL on failure 380189251Ssam * 381189251Ssam * This function is used after TLS handshake has been completed successfully to 382214734Srpaulo * send data in the encrypted tunnel. The caller is responsible for freeing the 383214734Srpaulo * returned output data. 384189251Ssam */ 385214734Srpaulostruct wpabuf * tls_connection_encrypt(void *tls_ctx, 386214734Srpaulo struct tls_connection *conn, 387214734Srpaulo const struct wpabuf *in_data); 388189251Ssam 389189251Ssam/** 390189251Ssam * tls_connection_decrypt - Decrypt data from TLS tunnel 391189251Ssam * @tls_ctx: TLS context data from tls_init() 392189251Ssam * @conn: Connection context data from tls_connection_init() 393214734Srpaulo * @in_data: Encrypted TLS data 394214734Srpaulo * Returns: Decrypted TLS data or %NULL on failure 395189251Ssam * 396189251Ssam * This function is used after TLS handshake has been completed successfully to 397214734Srpaulo * receive data from the encrypted tunnel. The caller is responsible for 398214734Srpaulo * freeing the returned output data. 399189251Ssam */ 400214734Srpaulostruct wpabuf * tls_connection_decrypt(void *tls_ctx, 401214734Srpaulo struct tls_connection *conn, 402214734Srpaulo const struct wpabuf *in_data); 403189251Ssam 404252726Srpaulostruct wpabuf * tls_connection_decrypt2(void *tls_ctx, 405252726Srpaulo struct tls_connection *conn, 406252726Srpaulo const struct wpabuf *in_data, 407252726Srpaulo int *more_data_needed); 408252726Srpaulo 409189251Ssam/** 410189251Ssam * tls_connection_resumed - Was session resumption used 411189251Ssam * @tls_ctx: TLS context data from tls_init() 412189251Ssam * @conn: Connection context data from tls_connection_init() 413189251Ssam * Returns: 1 if current session used session resumption, 0 if not 414189251Ssam */ 415189251Ssamint tls_connection_resumed(void *tls_ctx, struct tls_connection *conn); 416189251Ssam 417189251Ssamenum { 418189251Ssam TLS_CIPHER_NONE, 419189251Ssam TLS_CIPHER_RC4_SHA /* 0x0005 */, 420189251Ssam TLS_CIPHER_AES128_SHA /* 0x002f */, 421189251Ssam TLS_CIPHER_RSA_DHE_AES128_SHA /* 0x0031 */, 422189251Ssam TLS_CIPHER_ANON_DH_AES128_SHA /* 0x0034 */ 423189251Ssam}; 424189251Ssam 425189251Ssam/** 426189251Ssam * tls_connection_set_cipher_list - Configure acceptable cipher suites 427189251Ssam * @tls_ctx: TLS context data from tls_init() 428189251Ssam * @conn: Connection context data from tls_connection_init() 429189251Ssam * @ciphers: Zero (TLS_CIPHER_NONE) terminated list of allowed ciphers 430189251Ssam * (TLS_CIPHER_*). 431189251Ssam * Returns: 0 on success, -1 on failure 432189251Ssam */ 433189251Ssamint __must_check tls_connection_set_cipher_list(void *tls_ctx, 434189251Ssam struct tls_connection *conn, 435189251Ssam u8 *ciphers); 436189251Ssam 437189251Ssam/** 438189251Ssam * tls_get_cipher - Get current cipher name 439189251Ssam * @tls_ctx: TLS context data from tls_init() 440189251Ssam * @conn: Connection context data from tls_connection_init() 441189251Ssam * @buf: Buffer for the cipher name 442189251Ssam * @buflen: buf size 443189251Ssam * Returns: 0 on success, -1 on failure 444189251Ssam * 445189251Ssam * Get the name of the currently used cipher. 446189251Ssam */ 447189251Ssamint __must_check tls_get_cipher(void *tls_ctx, struct tls_connection *conn, 448189251Ssam char *buf, size_t buflen); 449189251Ssam 450189251Ssam/** 451189251Ssam * tls_connection_enable_workaround - Enable TLS workaround options 452189251Ssam * @tls_ctx: TLS context data from tls_init() 453189251Ssam * @conn: Connection context data from tls_connection_init() 454189251Ssam * Returns: 0 on success, -1 on failure 455189251Ssam * 456189251Ssam * This function is used to enable connection-specific workaround options for 457189251Ssam * buffer SSL/TLS implementations. 458189251Ssam */ 459189251Ssamint __must_check tls_connection_enable_workaround(void *tls_ctx, 460189251Ssam struct tls_connection *conn); 461189251Ssam 462189251Ssam/** 463189251Ssam * tls_connection_client_hello_ext - Set TLS extension for ClientHello 464189251Ssam * @tls_ctx: TLS context data from tls_init() 465189251Ssam * @conn: Connection context data from tls_connection_init() 466189251Ssam * @ext_type: Extension type 467189251Ssam * @data: Extension payload (%NULL to remove extension) 468189251Ssam * @data_len: Extension payload length 469189251Ssam * Returns: 0 on success, -1 on failure 470189251Ssam */ 471189251Ssamint __must_check tls_connection_client_hello_ext(void *tls_ctx, 472189251Ssam struct tls_connection *conn, 473189251Ssam int ext_type, const u8 *data, 474189251Ssam size_t data_len); 475189251Ssam 476189251Ssam/** 477189251Ssam * tls_connection_get_failed - Get connection failure status 478189251Ssam * @tls_ctx: TLS context data from tls_init() 479189251Ssam * @conn: Connection context data from tls_connection_init() 480189251Ssam * 481189251Ssam * Returns >0 if connection has failed, 0 if not. 482189251Ssam */ 483189251Ssamint tls_connection_get_failed(void *tls_ctx, struct tls_connection *conn); 484189251Ssam 485189251Ssam/** 486189251Ssam * tls_connection_get_read_alerts - Get connection read alert status 487189251Ssam * @tls_ctx: TLS context data from tls_init() 488189251Ssam * @conn: Connection context data from tls_connection_init() 489189251Ssam * Returns: Number of times a fatal read (remote end reported error) has 490189251Ssam * happened during this connection. 491189251Ssam */ 492189251Ssamint tls_connection_get_read_alerts(void *tls_ctx, struct tls_connection *conn); 493189251Ssam 494189251Ssam/** 495189251Ssam * tls_connection_get_write_alerts - Get connection write alert status 496189251Ssam * @tls_ctx: TLS context data from tls_init() 497189251Ssam * @conn: Connection context data from tls_connection_init() 498189251Ssam * Returns: Number of times a fatal write (locally detected error) has happened 499189251Ssam * during this connection. 500189251Ssam */ 501189251Ssamint tls_connection_get_write_alerts(void *tls_ctx, 502189251Ssam struct tls_connection *conn); 503189251Ssam 504189251Ssam/** 505189251Ssam * tls_connection_get_keyblock_size - Get TLS key_block size 506189251Ssam * @tls_ctx: TLS context data from tls_init() 507189251Ssam * @conn: Connection context data from tls_connection_init() 508189251Ssam * Returns: Size of the key_block for the negotiated cipher suite or -1 on 509189251Ssam * failure 510189251Ssam */ 511189251Ssamint tls_connection_get_keyblock_size(void *tls_ctx, 512189251Ssam struct tls_connection *conn); 513189251Ssam 514189251Ssam/** 515189251Ssam * tls_capabilities - Get supported TLS capabilities 516189251Ssam * @tls_ctx: TLS context data from tls_init() 517189251Ssam * Returns: Bit field of supported TLS capabilities (TLS_CAPABILITY_*) 518189251Ssam */ 519189251Ssamunsigned int tls_capabilities(void *tls_ctx); 520189251Ssam 521189251Ssamtypedef int (*tls_session_ticket_cb) 522189251Ssam(void *ctx, const u8 *ticket, size_t len, const u8 *client_random, 523189251Ssam const u8 *server_random, u8 *master_secret); 524189251Ssam 525189251Ssamint __must_check tls_connection_set_session_ticket_cb( 526189251Ssam void *tls_ctx, struct tls_connection *conn, 527189251Ssam tls_session_ticket_cb cb, void *ctx); 528189251Ssam 529189251Ssam#endif /* TLS_H */ 530