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