1 /* 2 * SSL/TLS interface definition 3 * Copyright (c) 2004-2013, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #ifndef TLS_H 10 #define TLS_H 11 12 struct tls_connection; 13 14 struct tls_random { 15 const u8 *client_random; 16 size_t client_random_len; 17 const u8 *server_random; 18 size_t server_random_len; 19 }; 20 21 enum tls_event { 22 TLS_CERT_CHAIN_SUCCESS, 23 TLS_CERT_CHAIN_FAILURE, 24 TLS_PEER_CERTIFICATE, 25 TLS_ALERT, 26 TLS_UNSAFE_RENEGOTIATION_DISABLED, 27 }; 28 29 /* 30 * Note: These are used as identifier with external programs and as such, the 31 * values must not be changed. 32 */ 33 enum tls_fail_reason { 34 TLS_FAIL_UNSPECIFIED = 0, 35 TLS_FAIL_UNTRUSTED = 1, 36 TLS_FAIL_REVOKED = 2, 37 TLS_FAIL_NOT_YET_VALID = 3, 38 TLS_FAIL_EXPIRED = 4, 39 TLS_FAIL_SUBJECT_MISMATCH = 5, 40 TLS_FAIL_ALTSUBJECT_MISMATCH = 6, 41 TLS_FAIL_BAD_CERTIFICATE = 7, 42 TLS_FAIL_SERVER_CHAIN_PROBE = 8, 43 TLS_FAIL_DOMAIN_SUFFIX_MISMATCH = 9, 44 TLS_FAIL_DOMAIN_MISMATCH = 10, 45 TLS_FAIL_INSUFFICIENT_KEY_LEN = 11, 46 TLS_FAIL_DN_MISMATCH = 12, 47 }; 48 49 50 #define TLS_MAX_ALT_SUBJECT 10 51 52 struct tls_cert_data { 53 int depth; 54 const char *subject; 55 const struct wpabuf *cert; 56 const u8 *hash; 57 size_t hash_len; 58 const char *altsubject[TLS_MAX_ALT_SUBJECT]; 59 int num_altsubject; 60 const char *serial_num; 61 int tod; 62 }; 63 64 union tls_event_data { 65 struct { 66 int depth; 67 const char *subject; 68 enum tls_fail_reason reason; 69 const char *reason_txt; 70 const struct wpabuf *cert; 71 } cert_fail; 72 73 struct tls_cert_data peer_cert; 74 75 struct { 76 int is_local; 77 const char *type; 78 const char *description; 79 } alert; 80 }; 81 82 struct tls_config { 83 #ifndef CONFIG_OPENSC_ENGINE_PATH 84 const char *opensc_engine_path; 85 #endif /* CONFIG_OPENSC_ENGINE_PATH */ 86 #ifndef CONFIG_PKCS11_ENGINE_PATH 87 const char *pkcs11_engine_path; 88 #endif /* CONFIG_PKCS11_ENGINE_PATH */ 89 #ifndef CONFIG_PKCS11_MODULE_PATH 90 const char *pkcs11_module_path; 91 #endif /* CONFIG_PKCS11_MODULE_PATH */ 92 int fips_mode; 93 int cert_in_cb; 94 const char *openssl_ciphers; 95 unsigned int tls_session_lifetime; 96 unsigned int crl_reload_interval; 97 unsigned int tls_flags; 98 99 void (*event_cb)(void *ctx, enum tls_event ev, 100 union tls_event_data *data); 101 void *cb_ctx; 102 }; 103 104 #define TLS_CONN_ALLOW_SIGN_RSA_MD5 BIT(0) 105 #define TLS_CONN_DISABLE_TIME_CHECKS BIT(1) 106 #define TLS_CONN_DISABLE_SESSION_TICKET BIT(2) 107 #define TLS_CONN_REQUEST_OCSP BIT(3) 108 #define TLS_CONN_REQUIRE_OCSP BIT(4) 109 #define TLS_CONN_DISABLE_TLSv1_1 BIT(5) 110 #define TLS_CONN_DISABLE_TLSv1_2 BIT(6) 111 #define TLS_CONN_EAP_FAST BIT(7) 112 #define TLS_CONN_DISABLE_TLSv1_0 BIT(8) 113 #define TLS_CONN_EXT_CERT_CHECK BIT(9) 114 #define TLS_CONN_REQUIRE_OCSP_ALL BIT(10) 115 #define TLS_CONN_SUITEB BIT(11) 116 #define TLS_CONN_SUITEB_NO_ECDH BIT(12) 117 #define TLS_CONN_DISABLE_TLSv1_3 BIT(13) 118 #define TLS_CONN_ENABLE_TLSv1_0 BIT(14) 119 #define TLS_CONN_ENABLE_TLSv1_1 BIT(15) 120 #define TLS_CONN_ENABLE_TLSv1_2 BIT(16) 121 #define TLS_CONN_TEAP_ANON_DH BIT(17) 122 #define TLS_CONN_ALLOW_UNSAFE_RENEGOTIATION BIT(18) 123 124 /** 125 * struct tls_connection_params - Parameters for TLS connection 126 * @ca_cert: File or reference name for CA X.509 certificate in PEM or DER 127 * format 128 * @ca_cert_blob: ca_cert as inlined data or %NULL if not used 129 * @ca_cert_blob_len: ca_cert_blob length 130 * @ca_path: Path to CA certificates (OpenSSL specific) 131 * @subject_match: String to match in the subject of the peer certificate or 132 * %NULL to allow all subjects 133 * @altsubject_match: String to match in the alternative subject of the peer 134 * certificate or %NULL to allow all alternative subjects 135 * @suffix_match: Semicolon deliminated string of values to suffix match against 136 * the dNSName or CN of the peer certificate or %NULL to allow all domain names. 137 * This may allow subdomains and wildcard certificates. Each domain name label 138 * must have a full case-insensitive match. 139 * @domain_match: String to match in the dNSName or CN of the peer 140 * certificate or %NULL to allow all domain names. This requires a full, 141 * case-insensitive match. 142 * 143 * More than one match string can be provided by using semicolons to 144 * separate the strings (e.g., example.org;example.com). When multiple 145 * strings are specified, a match with any one of the values is 146 * considered a sufficient match for the certificate, i.e., the 147 * conditions are ORed together. 148 * @client_cert: File or reference name for client X.509 certificate in PEM or 149 * DER format 150 * @client_cert_blob: client_cert as inlined data or %NULL if not used 151 * @client_cert_blob_len: client_cert_blob length 152 * @private_key: File or reference name for client private key in PEM or DER 153 * format (traditional format (RSA PRIVATE KEY) or PKCS#8 (PRIVATE KEY) 154 * @private_key_blob: private_key as inlined data or %NULL if not used 155 * @private_key_blob_len: private_key_blob length 156 * @private_key_passwd: Passphrase for decrypted private key, %NULL if no 157 * passphrase is used. 158 * @dh_file: File name for DH/DSA data in PEM format, or %NULL if not used 159 * @engine: 1 = use engine (e.g., a smartcard) for private key operations 160 * (this is OpenSSL specific for now) 161 * @engine_id: engine id string (this is OpenSSL specific for now) 162 * @ppin: pointer to the pin variable in the configuration 163 * (this is OpenSSL specific for now) 164 * @key_id: the private key's id when using engine (this is OpenSSL 165 * specific for now) 166 * @cert_id: the certificate's id when using engine 167 * @ca_cert_id: the CA certificate's id when using engine 168 * @openssl_ciphers: OpenSSL cipher configuration 169 * @openssl_ecdh_curves: OpenSSL ECDH curve configuration. %NULL for auto if 170 * supported, empty string to disable, or a colon-separated curve list. 171 * @flags: Parameter options (TLS_CONN_*) 172 * @ocsp_stapling_response: DER encoded file with cached OCSP stapling response 173 * or %NULL if OCSP is not enabled 174 * @ocsp_stapling_response_multi: DER encoded file with cached OCSP stapling 175 * response list (OCSPResponseList for ocsp_multi in RFC 6961) or %NULL if 176 * ocsp_multi is not enabled 177 * @check_cert_subject: Client certificate subject name matching string 178 * 179 * TLS connection parameters to be configured with tls_connection_set_params() 180 * and tls_global_set_params(). 181 * 182 * Certificates and private key can be configured either as a reference name 183 * (file path or reference to certificate store) or by providing the same data 184 * as a pointer to the data in memory. Only one option will be used for each 185 * field. 186 */ 187 struct tls_connection_params { 188 const char *ca_cert; 189 const u8 *ca_cert_blob; 190 size_t ca_cert_blob_len; 191 const char *ca_path; 192 const char *subject_match; 193 const char *altsubject_match; 194 const char *suffix_match; 195 const char *domain_match; 196 const char *client_cert; 197 const char *client_cert2; 198 const u8 *client_cert_blob; 199 size_t client_cert_blob_len; 200 const char *private_key; 201 const char *private_key2; 202 const u8 *private_key_blob; 203 size_t private_key_blob_len; 204 const char *private_key_passwd; 205 const char *private_key_passwd2; 206 const char *dh_file; 207 208 /* OpenSSL specific variables */ 209 int engine; 210 const char *engine_id; 211 const char *pin; 212 const char *key_id; 213 const char *cert_id; 214 const char *ca_cert_id; 215 const char *openssl_ciphers; 216 const char *openssl_ecdh_curves; 217 218 unsigned int flags; 219 const char *ocsp_stapling_response; 220 const char *ocsp_stapling_response_multi; 221 const char *check_cert_subject; 222 }; 223 224 225 /** 226 * tls_init - Initialize TLS library 227 * @conf: Configuration data for TLS library 228 * Returns: Context data to be used as tls_ctx in calls to other functions, 229 * or %NULL on failure. 230 * 231 * Called once during program startup and once for each RSN pre-authentication 232 * session. In other words, there can be two concurrent TLS contexts. If global 233 * library initialization is needed (i.e., one that is shared between both 234 * authentication types), the TLS library wrapper should maintain a reference 235 * counter and do global initialization only when moving from 0 to 1 reference. 236 */ 237 void * tls_init(const struct tls_config *conf); 238 239 /** 240 * tls_deinit - Deinitialize TLS library 241 * @tls_ctx: TLS context data from tls_init() 242 * 243 * Called once during program shutdown and once for each RSN pre-authentication 244 * session. If global library deinitialization is needed (i.e., one that is 245 * shared between both authentication types), the TLS library wrapper should 246 * maintain a reference counter and do global deinitialization only when moving 247 * from 1 to 0 references. 248 */ 249 void tls_deinit(void *tls_ctx); 250 251 /** 252 * tls_get_errors - Process pending errors 253 * @tls_ctx: TLS context data from tls_init() 254 * Returns: Number of found error, 0 if no errors detected. 255 * 256 * Process all pending TLS errors. 257 */ 258 int tls_get_errors(void *tls_ctx); 259 260 /** 261 * tls_connection_init - Initialize a new TLS connection 262 * @tls_ctx: TLS context data from tls_init() 263 * Returns: Connection context data, conn for other function calls 264 */ 265 struct tls_connection * tls_connection_init(void *tls_ctx); 266 267 /** 268 * tls_connection_deinit - Free TLS connection data 269 * @tls_ctx: TLS context data from tls_init() 270 * @conn: Connection context data from tls_connection_init() 271 * 272 * Release all resources allocated for TLS connection. 273 */ 274 void tls_connection_deinit(void *tls_ctx, struct tls_connection *conn); 275 276 /** 277 * tls_connection_established - Has the TLS connection been completed? 278 * @tls_ctx: TLS context data from tls_init() 279 * @conn: Connection context data from tls_connection_init() 280 * Returns: 1 if TLS connection has been completed, 0 if not. 281 */ 282 int tls_connection_established(void *tls_ctx, struct tls_connection *conn); 283 284 /** 285 * tls_connection_peer_serial_num - Fetch peer certificate serial number 286 * @tls_ctx: TLS context data from tls_init() 287 * @conn: Connection context data from tls_connection_init() 288 * Returns: Allocated string buffer containing the peer certificate serial 289 * number or %NULL on error. 290 * 291 * The caller is responsible for freeing the returned buffer with os_free(). 292 */ 293 char * tls_connection_peer_serial_num(void *tls_ctx, 294 struct tls_connection *conn); 295 296 /** 297 * tls_connection_shutdown - Shutdown TLS connection 298 * @tls_ctx: TLS context data from tls_init() 299 * @conn: Connection context data from tls_connection_init() 300 * Returns: 0 on success, -1 on failure 301 * 302 * Shutdown current TLS connection without releasing all resources. New 303 * connection can be started by using the same conn without having to call 304 * tls_connection_init() or setting certificates etc. again. The new 305 * connection should try to use session resumption. 306 */ 307 int tls_connection_shutdown(void *tls_ctx, struct tls_connection *conn); 308 309 enum { 310 TLS_SET_PARAMS_ENGINE_PRV_BAD_PIN = -4, 311 TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED = -3, 312 TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED = -2 313 }; 314 315 /** 316 * tls_connection_set_params - Set TLS connection parameters 317 * @tls_ctx: TLS context data from tls_init() 318 * @conn: Connection context data from tls_connection_init() 319 * @params: Connection parameters 320 * Returns: 0 on success, -1 on failure, 321 * TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED (-2) on error causing PKCS#11 engine 322 * failure, or 323 * TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED (-3) on failure to verify the 324 * PKCS#11 engine private key, or 325 * TLS_SET_PARAMS_ENGINE_PRV_BAD_PIN (-4) on PIN error causing PKCS#11 engine 326 * failure. 327 */ 328 int __must_check 329 tls_connection_set_params(void *tls_ctx, struct tls_connection *conn, 330 const struct tls_connection_params *params); 331 332 /** 333 * tls_global_set_params - Set TLS parameters for all TLS connection 334 * @tls_ctx: TLS context data from tls_init() 335 * @params: Global TLS parameters 336 * Returns: 0 on success, -1 on failure, 337 * TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED (-2) on error causing PKCS#11 engine 338 * failure, or 339 * TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED (-3) on failure to verify the 340 * PKCS#11 engine private key, or 341 * TLS_SET_PARAMS_ENGINE_PRV_BAD_PIN (-4) on PIN error causing PKCS#11 engine 342 * failure. 343 */ 344 int __must_check tls_global_set_params( 345 void *tls_ctx, const struct tls_connection_params *params); 346 347 /** 348 * tls_global_set_verify - Set global certificate verification options 349 * @tls_ctx: TLS context data from tls_init() 350 * @check_crl: 0 = do not verify CRLs, 1 = verify CRL for the user certificate, 351 * 2 = verify CRL for all certificates 352 * @strict: 0 = allow CRL time errors, 1 = do not allow CRL time errors 353 * Returns: 0 on success, -1 on failure 354 */ 355 int __must_check tls_global_set_verify(void *tls_ctx, int check_crl, 356 int strict); 357 358 /** 359 * tls_connection_set_verify - Set certificate verification options 360 * @tls_ctx: TLS context data from tls_init() 361 * @conn: Connection context data from tls_connection_init() 362 * @verify_peer: 0 = do not verify peer certificate, 1 = verify peer 363 * certificate (require it to be provided), 2 = verify peer certificate if 364 * provided 365 * @flags: Connection flags (TLS_CONN_*) 366 * @session_ctx: Session caching context or %NULL to use default 367 * @session_ctx_len: Length of @session_ctx in bytes. 368 * Returns: 0 on success, -1 on failure 369 */ 370 int __must_check tls_connection_set_verify(void *tls_ctx, 371 struct tls_connection *conn, 372 int verify_peer, 373 unsigned int flags, 374 const u8 *session_ctx, 375 size_t session_ctx_len); 376 377 /** 378 * tls_connection_get_random - Get random data from TLS connection 379 * @tls_ctx: TLS context data from tls_init() 380 * @conn: Connection context data from tls_connection_init() 381 * @data: Structure of client/server random data (filled on success) 382 * Returns: 0 on success, -1 on failure 383 */ 384 int __must_check tls_connection_get_random(void *tls_ctx, 385 struct tls_connection *conn, 386 struct tls_random *data); 387 388 /** 389 * tls_connection_export_key - Derive keying material from a TLS connection 390 * @tls_ctx: TLS context data from tls_init() 391 * @conn: Connection context data from tls_connection_init() 392 * @label: Label (e.g., description of the key) for PRF 393 * @context: Optional extra upper-layer context (max len 2^16) 394 * @context_len: The length of the context value 395 * @out: Buffer for output data from TLS-PRF 396 * @out_len: Length of the output buffer 397 * Returns: 0 on success, -1 on failure 398 * 399 * Exports keying material using the mechanism described in RFC 5705. If 400 * context is %NULL, context is not provided; otherwise, context is provided 401 * (including the case of empty context with context_len == 0). 402 */ 403 int __must_check tls_connection_export_key(void *tls_ctx, 404 struct tls_connection *conn, 405 const char *label, 406 const u8 *context, 407 size_t context_len, 408 u8 *out, size_t out_len); 409 410 /** 411 * tls_connection_get_eap_fast_key - Derive key material for EAP-FAST 412 * @tls_ctx: TLS context data from tls_init() 413 * @conn: Connection context data from tls_connection_init() 414 * @out: Buffer for output data from TLS-PRF 415 * @out_len: Length of the output buffer 416 * Returns: 0 on success, -1 on failure 417 * 418 * Exports key material after the normal TLS key block for use with 419 * EAP-FAST. Most callers will want tls_connection_export_key(), but EAP-FAST 420 * uses a different legacy mechanism. 421 */ 422 int __must_check tls_connection_get_eap_fast_key(void *tls_ctx, 423 struct tls_connection *conn, 424 u8 *out, size_t out_len); 425 426 /** 427 * tls_connection_handshake - Process TLS handshake (client side) 428 * @tls_ctx: TLS context data from tls_init() 429 * @conn: Connection context data from tls_connection_init() 430 * @in_data: Input data from TLS server 431 * @appl_data: Pointer to application data pointer, or %NULL if dropped 432 * Returns: Output data, %NULL on failure 433 * 434 * The caller is responsible for freeing the returned output data. If the final 435 * handshake message includes application data, this is decrypted and 436 * appl_data (if not %NULL) is set to point this data. The caller is 437 * responsible for freeing appl_data. 438 * 439 * This function is used during TLS handshake. The first call is done with 440 * in_data == %NULL and the library is expected to return ClientHello packet. 441 * This packet is then send to the server and a response from server is given 442 * to TLS library by calling this function again with in_data pointing to the 443 * TLS message from the server. 444 * 445 * If the TLS handshake fails, this function may return %NULL. However, if the 446 * TLS library has a TLS alert to send out, that should be returned as the 447 * output data. In this case, tls_connection_get_failed() must return failure 448 * (> 0). 449 * 450 * tls_connection_established() should return 1 once the TLS handshake has been 451 * completed successfully. 452 */ 453 struct wpabuf * tls_connection_handshake(void *tls_ctx, 454 struct tls_connection *conn, 455 const struct wpabuf *in_data, 456 struct wpabuf **appl_data); 457 458 struct wpabuf * tls_connection_handshake2(void *tls_ctx, 459 struct tls_connection *conn, 460 const struct wpabuf *in_data, 461 struct wpabuf **appl_data, 462 int *more_data_needed); 463 464 /** 465 * tls_connection_server_handshake - Process TLS handshake (server side) 466 * @tls_ctx: TLS context data from tls_init() 467 * @conn: Connection context data from tls_connection_init() 468 * @in_data: Input data from TLS peer 469 * @appl_data: Pointer to application data pointer, or %NULL if dropped 470 * Returns: Output data, %NULL on failure 471 * 472 * The caller is responsible for freeing the returned output data. 473 */ 474 struct wpabuf * tls_connection_server_handshake(void *tls_ctx, 475 struct tls_connection *conn, 476 const struct wpabuf *in_data, 477 struct wpabuf **appl_data); 478 479 /** 480 * tls_connection_encrypt - Encrypt data into TLS tunnel 481 * @tls_ctx: TLS context data from tls_init() 482 * @conn: Connection context data from tls_connection_init() 483 * @in_data: Plaintext data to be encrypted 484 * Returns: Encrypted TLS data or %NULL on failure 485 * 486 * This function is used after TLS handshake has been completed successfully to 487 * send data in the encrypted tunnel. The caller is responsible for freeing the 488 * returned output data. 489 */ 490 struct wpabuf * tls_connection_encrypt(void *tls_ctx, 491 struct tls_connection *conn, 492 const struct wpabuf *in_data); 493 494 /** 495 * tls_connection_decrypt - Decrypt data from TLS tunnel 496 * @tls_ctx: TLS context data from tls_init() 497 * @conn: Connection context data from tls_connection_init() 498 * @in_data: Encrypted TLS data 499 * Returns: Decrypted TLS data or %NULL on failure 500 * 501 * This function is used after TLS handshake has been completed successfully to 502 * receive data from the encrypted tunnel. The caller is responsible for 503 * freeing the returned output data. 504 */ 505 struct wpabuf * tls_connection_decrypt(void *tls_ctx, 506 struct tls_connection *conn, 507 const struct wpabuf *in_data); 508 509 struct wpabuf * tls_connection_decrypt2(void *tls_ctx, 510 struct tls_connection *conn, 511 const struct wpabuf *in_data, 512 int *more_data_needed); 513 514 /** 515 * tls_connection_resumed - Was session resumption used 516 * @tls_ctx: TLS context data from tls_init() 517 * @conn: Connection context data from tls_connection_init() 518 * Returns: 1 if current session used session resumption, 0 if not 519 */ 520 int tls_connection_resumed(void *tls_ctx, struct tls_connection *conn); 521 522 enum { 523 TLS_CIPHER_NONE, 524 TLS_CIPHER_RC4_SHA /* 0x0005 */, 525 TLS_CIPHER_AES128_SHA /* 0x002f */, 526 TLS_CIPHER_RSA_DHE_AES128_SHA /* 0x0031 */, 527 TLS_CIPHER_ANON_DH_AES128_SHA /* 0x0034 */, 528 TLS_CIPHER_RSA_DHE_AES256_SHA /* 0x0039 */, 529 TLS_CIPHER_AES256_SHA /* 0x0035 */, 530 }; 531 532 /** 533 * tls_connection_set_cipher_list - Configure acceptable cipher suites 534 * @tls_ctx: TLS context data from tls_init() 535 * @conn: Connection context data from tls_connection_init() 536 * @ciphers: Zero (TLS_CIPHER_NONE) terminated list of allowed ciphers 537 * (TLS_CIPHER_*). 538 * Returns: 0 on success, -1 on failure 539 */ 540 int __must_check tls_connection_set_cipher_list(void *tls_ctx, 541 struct tls_connection *conn, 542 u8 *ciphers); 543 544 /** 545 * tls_get_version - Get the current TLS version number 546 * @tls_ctx: TLS context data from tls_init() 547 * @conn: Connection context data from tls_connection_init() 548 * @buf: Buffer for returning the TLS version number 549 * @buflen: buf size 550 * Returns: 0 on success, -1 on failure 551 * 552 * Get the currently used TLS version number. 553 */ 554 int __must_check tls_get_version(void *tls_ctx, struct tls_connection *conn, 555 char *buf, size_t buflen); 556 557 /** 558 * tls_get_cipher - Get current cipher name 559 * @tls_ctx: TLS context data from tls_init() 560 * @conn: Connection context data from tls_connection_init() 561 * @buf: Buffer for the cipher name 562 * @buflen: buf size 563 * Returns: 0 on success, -1 on failure 564 * 565 * Get the name of the currently used cipher. 566 */ 567 int __must_check tls_get_cipher(void *tls_ctx, struct tls_connection *conn, 568 char *buf, size_t buflen); 569 570 /** 571 * tls_connection_enable_workaround - Enable TLS workaround options 572 * @tls_ctx: TLS context data from tls_init() 573 * @conn: Connection context data from tls_connection_init() 574 * Returns: 0 on success, -1 on failure 575 * 576 * This function is used to enable connection-specific workaround options for 577 * buffer SSL/TLS implementations. 578 */ 579 int __must_check tls_connection_enable_workaround(void *tls_ctx, 580 struct tls_connection *conn); 581 582 /** 583 * tls_connection_client_hello_ext - Set TLS extension for ClientHello 584 * @tls_ctx: TLS context data from tls_init() 585 * @conn: Connection context data from tls_connection_init() 586 * @ext_type: Extension type 587 * @data: Extension payload (%NULL to remove extension) 588 * @data_len: Extension payload length 589 * Returns: 0 on success, -1 on failure 590 */ 591 int __must_check tls_connection_client_hello_ext(void *tls_ctx, 592 struct tls_connection *conn, 593 int ext_type, const u8 *data, 594 size_t data_len); 595 596 /** 597 * tls_connection_get_failed - Get connection failure status 598 * @tls_ctx: TLS context data from tls_init() 599 * @conn: Connection context data from tls_connection_init() 600 * 601 * Returns >0 if connection has failed, 0 if not. 602 */ 603 int tls_connection_get_failed(void *tls_ctx, struct tls_connection *conn); 604 605 /** 606 * tls_connection_get_read_alerts - Get connection read alert status 607 * @tls_ctx: TLS context data from tls_init() 608 * @conn: Connection context data from tls_connection_init() 609 * Returns: Number of times a fatal read (remote end reported error) has 610 * happened during this connection. 611 */ 612 int tls_connection_get_read_alerts(void *tls_ctx, struct tls_connection *conn); 613 614 /** 615 * tls_connection_get_write_alerts - Get connection write alert status 616 * @tls_ctx: TLS context data from tls_init() 617 * @conn: Connection context data from tls_connection_init() 618 * Returns: Number of times a fatal write (locally detected error) has happened 619 * during this connection. 620 */ 621 int tls_connection_get_write_alerts(void *tls_ctx, 622 struct tls_connection *conn); 623 624 typedef int (*tls_session_ticket_cb) 625 (void *ctx, const u8 *ticket, size_t len, const u8 *client_random, 626 const u8 *server_random, u8 *master_secret); 627 628 int __must_check tls_connection_set_session_ticket_cb( 629 void *tls_ctx, struct tls_connection *conn, 630 tls_session_ticket_cb cb, void *ctx); 631 632 void tls_connection_set_log_cb(struct tls_connection *conn, 633 void (*log_cb)(void *ctx, const char *msg), 634 void *ctx); 635 636 #define TLS_BREAK_VERIFY_DATA BIT(0) 637 #define TLS_BREAK_SRV_KEY_X_HASH BIT(1) 638 #define TLS_BREAK_SRV_KEY_X_SIGNATURE BIT(2) 639 #define TLS_DHE_PRIME_511B BIT(3) 640 #define TLS_DHE_PRIME_767B BIT(4) 641 #define TLS_DHE_PRIME_15 BIT(5) 642 #define TLS_DHE_PRIME_58B BIT(6) 643 #define TLS_DHE_NON_PRIME BIT(7) 644 645 void tls_connection_set_test_flags(struct tls_connection *conn, u32 flags); 646 647 int tls_get_library_version(char *buf, size_t buf_len); 648 649 void tls_connection_set_success_data(struct tls_connection *conn, 650 struct wpabuf *data); 651 652 void tls_connection_set_success_data_resumed(struct tls_connection *conn); 653 654 const struct wpabuf * 655 tls_connection_get_success_data(struct tls_connection *conn); 656 657 void tls_connection_remove_session(struct tls_connection *conn); 658 659 /** 660 * tls_get_tls_unique - Fetch "tls-unique" for channel binding 661 * @conn: Connection context data from tls_connection_init() 662 * @buf: Buffer for returning the value 663 * @max_len: Maximum length of the buffer in bytes 664 * Returns: Number of bytes written to buf or -1 on error 665 * 666 * This function can be used to fetch "tls-unique" (RFC 5929, Section 3) which 667 * is the first TLS Finished message sent in the most recent TLS handshake of 668 * the TLS connection. 669 */ 670 int tls_get_tls_unique(struct tls_connection *conn, u8 *buf, size_t max_len); 671 672 /** 673 * tls_connection_get_cipher_suite - Get current TLS cipher suite 674 * @conn: Connection context data from tls_connection_init() 675 * Returns: TLS cipher suite of the current connection or 0 on error 676 */ 677 u16 tls_connection_get_cipher_suite(struct tls_connection *conn); 678 679 /** 680 * tls_connection_get_peer_subject - Get peer subject 681 * @conn: Connection context data from tls_connection_init() 682 * Returns: Peer subject or %NULL if not authenticated or not available 683 */ 684 const char * tls_connection_get_peer_subject(struct tls_connection *conn); 685 686 /** 687 * tls_connection_get_own_cert_used - Was own certificate used 688 * @conn: Connection context data from tls_connection_init() 689 * Returns: true if own certificate was used during authentication 690 */ 691 bool tls_connection_get_own_cert_used(struct tls_connection *conn); 692 693 #endif /* TLS_H */ 694