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 const u8 *dh_blob; 208 size_t dh_blob_len; 209 210 /* OpenSSL specific variables */ 211 int engine; 212 const char *engine_id; 213 const char *pin; 214 const char *key_id; 215 const char *cert_id; 216 const char *ca_cert_id; 217 const char *openssl_ciphers; 218 const char *openssl_ecdh_curves; 219 220 unsigned int flags; 221 const char *ocsp_stapling_response; 222 const char *ocsp_stapling_response_multi; 223 const char *check_cert_subject; 224 }; 225 226 227 /** 228 * tls_init - Initialize TLS library 229 * @conf: Configuration data for TLS library 230 * Returns: Context data to be used as tls_ctx in calls to other functions, 231 * or %NULL on failure. 232 * 233 * Called once during program startup and once for each RSN pre-authentication 234 * session. In other words, there can be two concurrent TLS contexts. If global 235 * library initialization is needed (i.e., one that is shared between both 236 * authentication types), the TLS library wrapper should maintain a reference 237 * counter and do global initialization only when moving from 0 to 1 reference. 238 */ 239 void * tls_init(const struct tls_config *conf); 240 241 /** 242 * tls_deinit - Deinitialize TLS library 243 * @tls_ctx: TLS context data from tls_init() 244 * 245 * Called once during program shutdown and once for each RSN pre-authentication 246 * session. If global library deinitialization is needed (i.e., one that is 247 * shared between both authentication types), the TLS library wrapper should 248 * maintain a reference counter and do global deinitialization only when moving 249 * from 1 to 0 references. 250 */ 251 void tls_deinit(void *tls_ctx); 252 253 /** 254 * tls_get_errors - Process pending errors 255 * @tls_ctx: TLS context data from tls_init() 256 * Returns: Number of found error, 0 if no errors detected. 257 * 258 * Process all pending TLS errors. 259 */ 260 int tls_get_errors(void *tls_ctx); 261 262 /** 263 * tls_connection_init - Initialize a new TLS connection 264 * @tls_ctx: TLS context data from tls_init() 265 * Returns: Connection context data, conn for other function calls 266 */ 267 struct tls_connection * tls_connection_init(void *tls_ctx); 268 269 /** 270 * tls_connection_deinit - Free TLS connection data 271 * @tls_ctx: TLS context data from tls_init() 272 * @conn: Connection context data from tls_connection_init() 273 * 274 * Release all resources allocated for TLS connection. 275 */ 276 void tls_connection_deinit(void *tls_ctx, struct tls_connection *conn); 277 278 /** 279 * tls_connection_established - Has the TLS connection been completed? 280 * @tls_ctx: TLS context data from tls_init() 281 * @conn: Connection context data from tls_connection_init() 282 * Returns: 1 if TLS connection has been completed, 0 if not. 283 */ 284 int tls_connection_established(void *tls_ctx, struct tls_connection *conn); 285 286 /** 287 * tls_connection_peer_serial_num - Fetch peer certificate serial number 288 * @tls_ctx: TLS context data from tls_init() 289 * @conn: Connection context data from tls_connection_init() 290 * Returns: Allocated string buffer containing the peer certificate serial 291 * number or %NULL on error. 292 * 293 * The caller is responsible for freeing the returned buffer with os_free(). 294 */ 295 char * tls_connection_peer_serial_num(void *tls_ctx, 296 struct tls_connection *conn); 297 298 /** 299 * tls_connection_shutdown - Shutdown TLS connection 300 * @tls_ctx: TLS context data from tls_init() 301 * @conn: Connection context data from tls_connection_init() 302 * Returns: 0 on success, -1 on failure 303 * 304 * Shutdown current TLS connection without releasing all resources. New 305 * connection can be started by using the same conn without having to call 306 * tls_connection_init() or setting certificates etc. again. The new 307 * connection should try to use session resumption. 308 */ 309 int tls_connection_shutdown(void *tls_ctx, struct tls_connection *conn); 310 311 enum { 312 TLS_SET_PARAMS_ENGINE_PRV_BAD_PIN = -4, 313 TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED = -3, 314 TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED = -2 315 }; 316 317 /** 318 * tls_connection_set_params - Set TLS connection parameters 319 * @tls_ctx: TLS context data from tls_init() 320 * @conn: Connection context data from tls_connection_init() 321 * @params: Connection parameters 322 * Returns: 0 on success, -1 on failure, 323 * TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED (-2) on error causing PKCS#11 engine 324 * failure, or 325 * TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED (-3) on failure to verify the 326 * PKCS#11 engine private key, or 327 * TLS_SET_PARAMS_ENGINE_PRV_BAD_PIN (-4) on PIN error causing PKCS#11 engine 328 * failure. 329 */ 330 int __must_check 331 tls_connection_set_params(void *tls_ctx, struct tls_connection *conn, 332 const struct tls_connection_params *params); 333 334 /** 335 * tls_global_set_params - Set TLS parameters for all TLS connection 336 * @tls_ctx: TLS context data from tls_init() 337 * @params: Global TLS parameters 338 * Returns: 0 on success, -1 on failure, 339 * TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED (-2) on error causing PKCS#11 engine 340 * failure, or 341 * TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED (-3) on failure to verify the 342 * PKCS#11 engine private key, or 343 * TLS_SET_PARAMS_ENGINE_PRV_BAD_PIN (-4) on PIN error causing PKCS#11 engine 344 * failure. 345 */ 346 int __must_check tls_global_set_params( 347 void *tls_ctx, const struct tls_connection_params *params); 348 349 /** 350 * tls_global_set_verify - Set global certificate verification options 351 * @tls_ctx: TLS context data from tls_init() 352 * @check_crl: 0 = do not verify CRLs, 1 = verify CRL for the user certificate, 353 * 2 = verify CRL for all certificates 354 * @strict: 0 = allow CRL time errors, 1 = do not allow CRL time errors 355 * Returns: 0 on success, -1 on failure 356 */ 357 int __must_check tls_global_set_verify(void *tls_ctx, int check_crl, 358 int strict); 359 360 /** 361 * tls_connection_set_verify - Set certificate verification options 362 * @tls_ctx: TLS context data from tls_init() 363 * @conn: Connection context data from tls_connection_init() 364 * @verify_peer: 0 = do not verify peer certificate, 1 = verify peer 365 * certificate (require it to be provided), 2 = verify peer certificate if 366 * provided 367 * @flags: Connection flags (TLS_CONN_*) 368 * @session_ctx: Session caching context or %NULL to use default 369 * @session_ctx_len: Length of @session_ctx in bytes. 370 * Returns: 0 on success, -1 on failure 371 */ 372 int __must_check tls_connection_set_verify(void *tls_ctx, 373 struct tls_connection *conn, 374 int verify_peer, 375 unsigned int flags, 376 const u8 *session_ctx, 377 size_t session_ctx_len); 378 379 /** 380 * tls_connection_get_random - Get random data from TLS connection 381 * @tls_ctx: TLS context data from tls_init() 382 * @conn: Connection context data from tls_connection_init() 383 * @data: Structure of client/server random data (filled on success) 384 * Returns: 0 on success, -1 on failure 385 */ 386 int __must_check tls_connection_get_random(void *tls_ctx, 387 struct tls_connection *conn, 388 struct tls_random *data); 389 390 /** 391 * tls_connection_export_key - Derive keying material from a TLS connection 392 * @tls_ctx: TLS context data from tls_init() 393 * @conn: Connection context data from tls_connection_init() 394 * @label: Label (e.g., description of the key) for PRF 395 * @context: Optional extra upper-layer context (max len 2^16) 396 * @context_len: The length of the context value 397 * @out: Buffer for output data from TLS-PRF 398 * @out_len: Length of the output buffer 399 * Returns: 0 on success, -1 on failure 400 * 401 * Exports keying material using the mechanism described in RFC 5705. If 402 * context is %NULL, context is not provided; otherwise, context is provided 403 * (including the case of empty context with context_len == 0). 404 */ 405 int __must_check tls_connection_export_key(void *tls_ctx, 406 struct tls_connection *conn, 407 const char *label, 408 const u8 *context, 409 size_t context_len, 410 u8 *out, size_t out_len); 411 412 /** 413 * tls_connection_get_eap_fast_key - Derive key material for EAP-FAST 414 * @tls_ctx: TLS context data from tls_init() 415 * @conn: Connection context data from tls_connection_init() 416 * @out: Buffer for output data from TLS-PRF 417 * @out_len: Length of the output buffer 418 * Returns: 0 on success, -1 on failure 419 * 420 * Exports key material after the normal TLS key block for use with 421 * EAP-FAST. Most callers will want tls_connection_export_key(), but EAP-FAST 422 * uses a different legacy mechanism. 423 */ 424 int __must_check tls_connection_get_eap_fast_key(void *tls_ctx, 425 struct tls_connection *conn, 426 u8 *out, size_t out_len); 427 428 /** 429 * tls_connection_handshake - Process TLS handshake (client side) 430 * @tls_ctx: TLS context data from tls_init() 431 * @conn: Connection context data from tls_connection_init() 432 * @in_data: Input data from TLS server 433 * @appl_data: Pointer to application data pointer, or %NULL if dropped 434 * Returns: Output data, %NULL on failure 435 * 436 * The caller is responsible for freeing the returned output data. If the final 437 * handshake message includes application data, this is decrypted and 438 * appl_data (if not %NULL) is set to point this data. The caller is 439 * responsible for freeing appl_data. 440 * 441 * This function is used during TLS handshake. The first call is done with 442 * in_data == %NULL and the library is expected to return ClientHello packet. 443 * This packet is then send to the server and a response from server is given 444 * to TLS library by calling this function again with in_data pointing to the 445 * TLS message from the server. 446 * 447 * If the TLS handshake fails, this function may return %NULL. However, if the 448 * TLS library has a TLS alert to send out, that should be returned as the 449 * output data. In this case, tls_connection_get_failed() must return failure 450 * (> 0). 451 * 452 * tls_connection_established() should return 1 once the TLS handshake has been 453 * completed successfully. 454 */ 455 struct wpabuf * tls_connection_handshake(void *tls_ctx, 456 struct tls_connection *conn, 457 const struct wpabuf *in_data, 458 struct wpabuf **appl_data); 459 460 struct wpabuf * tls_connection_handshake2(void *tls_ctx, 461 struct tls_connection *conn, 462 const struct wpabuf *in_data, 463 struct wpabuf **appl_data, 464 int *more_data_needed); 465 466 /** 467 * tls_connection_server_handshake - Process TLS handshake (server side) 468 * @tls_ctx: TLS context data from tls_init() 469 * @conn: Connection context data from tls_connection_init() 470 * @in_data: Input data from TLS peer 471 * @appl_data: Pointer to application data pointer, or %NULL if dropped 472 * Returns: Output data, %NULL on failure 473 * 474 * The caller is responsible for freeing the returned output data. 475 */ 476 struct wpabuf * tls_connection_server_handshake(void *tls_ctx, 477 struct tls_connection *conn, 478 const struct wpabuf *in_data, 479 struct wpabuf **appl_data); 480 481 /** 482 * tls_connection_encrypt - Encrypt data into TLS tunnel 483 * @tls_ctx: TLS context data from tls_init() 484 * @conn: Connection context data from tls_connection_init() 485 * @in_data: Plaintext data to be encrypted 486 * Returns: Encrypted TLS data or %NULL on failure 487 * 488 * This function is used after TLS handshake has been completed successfully to 489 * send data in the encrypted tunnel. The caller is responsible for freeing the 490 * returned output data. 491 */ 492 struct wpabuf * tls_connection_encrypt(void *tls_ctx, 493 struct tls_connection *conn, 494 const struct wpabuf *in_data); 495 496 /** 497 * tls_connection_decrypt - Decrypt data from TLS tunnel 498 * @tls_ctx: TLS context data from tls_init() 499 * @conn: Connection context data from tls_connection_init() 500 * @in_data: Encrypted TLS data 501 * Returns: Decrypted TLS data or %NULL on failure 502 * 503 * This function is used after TLS handshake has been completed successfully to 504 * receive data from the encrypted tunnel. The caller is responsible for 505 * freeing the returned output data. 506 */ 507 struct wpabuf * tls_connection_decrypt(void *tls_ctx, 508 struct tls_connection *conn, 509 const struct wpabuf *in_data); 510 511 struct wpabuf * tls_connection_decrypt2(void *tls_ctx, 512 struct tls_connection *conn, 513 const struct wpabuf *in_data, 514 int *more_data_needed); 515 516 /** 517 * tls_connection_resumed - Was session resumption used 518 * @tls_ctx: TLS context data from tls_init() 519 * @conn: Connection context data from tls_connection_init() 520 * Returns: 1 if current session used session resumption, 0 if not 521 */ 522 int tls_connection_resumed(void *tls_ctx, struct tls_connection *conn); 523 524 enum { 525 TLS_CIPHER_NONE, 526 TLS_CIPHER_RC4_SHA /* 0x0005 */, 527 TLS_CIPHER_AES128_SHA /* 0x002f */, 528 TLS_CIPHER_RSA_DHE_AES128_SHA /* 0x0031 */, 529 TLS_CIPHER_ANON_DH_AES128_SHA /* 0x0034 */, 530 TLS_CIPHER_RSA_DHE_AES256_SHA /* 0x0039 */, 531 TLS_CIPHER_AES256_SHA /* 0x0035 */, 532 }; 533 534 /** 535 * tls_connection_set_cipher_list - Configure acceptable cipher suites 536 * @tls_ctx: TLS context data from tls_init() 537 * @conn: Connection context data from tls_connection_init() 538 * @ciphers: Zero (TLS_CIPHER_NONE) terminated list of allowed ciphers 539 * (TLS_CIPHER_*). 540 * Returns: 0 on success, -1 on failure 541 */ 542 int __must_check tls_connection_set_cipher_list(void *tls_ctx, 543 struct tls_connection *conn, 544 u8 *ciphers); 545 546 /** 547 * tls_get_version - Get the current TLS version number 548 * @tls_ctx: TLS context data from tls_init() 549 * @conn: Connection context data from tls_connection_init() 550 * @buf: Buffer for returning the TLS version number 551 * @buflen: buf size 552 * Returns: 0 on success, -1 on failure 553 * 554 * Get the currently used TLS version number. 555 */ 556 int __must_check tls_get_version(void *tls_ctx, struct tls_connection *conn, 557 char *buf, size_t buflen); 558 559 /** 560 * tls_get_cipher - Get current cipher name 561 * @tls_ctx: TLS context data from tls_init() 562 * @conn: Connection context data from tls_connection_init() 563 * @buf: Buffer for the cipher name 564 * @buflen: buf size 565 * Returns: 0 on success, -1 on failure 566 * 567 * Get the name of the currently used cipher. 568 */ 569 int __must_check tls_get_cipher(void *tls_ctx, struct tls_connection *conn, 570 char *buf, size_t buflen); 571 572 /** 573 * tls_connection_enable_workaround - Enable TLS workaround options 574 * @tls_ctx: TLS context data from tls_init() 575 * @conn: Connection context data from tls_connection_init() 576 * Returns: 0 on success, -1 on failure 577 * 578 * This function is used to enable connection-specific workaround options for 579 * buffer SSL/TLS implementations. 580 */ 581 int __must_check tls_connection_enable_workaround(void *tls_ctx, 582 struct tls_connection *conn); 583 584 /** 585 * tls_connection_client_hello_ext - Set TLS extension for ClientHello 586 * @tls_ctx: TLS context data from tls_init() 587 * @conn: Connection context data from tls_connection_init() 588 * @ext_type: Extension type 589 * @data: Extension payload (%NULL to remove extension) 590 * @data_len: Extension payload length 591 * Returns: 0 on success, -1 on failure 592 */ 593 int __must_check tls_connection_client_hello_ext(void *tls_ctx, 594 struct tls_connection *conn, 595 int ext_type, const u8 *data, 596 size_t data_len); 597 598 /** 599 * tls_connection_get_failed - Get connection failure status 600 * @tls_ctx: TLS context data from tls_init() 601 * @conn: Connection context data from tls_connection_init() 602 * 603 * Returns >0 if connection has failed, 0 if not. 604 */ 605 int tls_connection_get_failed(void *tls_ctx, struct tls_connection *conn); 606 607 /** 608 * tls_connection_get_read_alerts - Get connection read alert status 609 * @tls_ctx: TLS context data from tls_init() 610 * @conn: Connection context data from tls_connection_init() 611 * Returns: Number of times a fatal read (remote end reported error) has 612 * happened during this connection. 613 */ 614 int tls_connection_get_read_alerts(void *tls_ctx, struct tls_connection *conn); 615 616 /** 617 * tls_connection_get_write_alerts - Get connection write alert status 618 * @tls_ctx: TLS context data from tls_init() 619 * @conn: Connection context data from tls_connection_init() 620 * Returns: Number of times a fatal write (locally detected error) has happened 621 * during this connection. 622 */ 623 int tls_connection_get_write_alerts(void *tls_ctx, 624 struct tls_connection *conn); 625 626 typedef int (*tls_session_ticket_cb) 627 (void *ctx, const u8 *ticket, size_t len, const u8 *client_random, 628 const u8 *server_random, u8 *master_secret); 629 630 int __must_check tls_connection_set_session_ticket_cb( 631 void *tls_ctx, struct tls_connection *conn, 632 tls_session_ticket_cb cb, void *ctx); 633 634 void tls_connection_set_log_cb(struct tls_connection *conn, 635 void (*log_cb)(void *ctx, const char *msg), 636 void *ctx); 637 638 #define TLS_BREAK_VERIFY_DATA BIT(0) 639 #define TLS_BREAK_SRV_KEY_X_HASH BIT(1) 640 #define TLS_BREAK_SRV_KEY_X_SIGNATURE BIT(2) 641 #define TLS_DHE_PRIME_511B BIT(3) 642 #define TLS_DHE_PRIME_767B BIT(4) 643 #define TLS_DHE_PRIME_15 BIT(5) 644 #define TLS_DHE_PRIME_58B BIT(6) 645 #define TLS_DHE_NON_PRIME BIT(7) 646 647 void tls_connection_set_test_flags(struct tls_connection *conn, u32 flags); 648 649 int tls_get_library_version(char *buf, size_t buf_len); 650 651 void tls_connection_set_success_data(struct tls_connection *conn, 652 struct wpabuf *data); 653 654 void tls_connection_set_success_data_resumed(struct tls_connection *conn); 655 656 const struct wpabuf * 657 tls_connection_get_success_data(struct tls_connection *conn); 658 659 void tls_connection_remove_session(struct tls_connection *conn); 660 661 /** 662 * tls_get_tls_unique - Fetch "tls-unique" for channel binding 663 * @conn: Connection context data from tls_connection_init() 664 * @buf: Buffer for returning the value 665 * @max_len: Maximum length of the buffer in bytes 666 * Returns: Number of bytes written to buf or -1 on error 667 * 668 * This function can be used to fetch "tls-unique" (RFC 5929, Section 3) which 669 * is the first TLS Finished message sent in the most recent TLS handshake of 670 * the TLS connection. 671 */ 672 int tls_get_tls_unique(struct tls_connection *conn, u8 *buf, size_t max_len); 673 674 /** 675 * tls_connection_get_cipher_suite - Get current TLS cipher suite 676 * @conn: Connection context data from tls_connection_init() 677 * Returns: TLS cipher suite of the current connection or 0 on error 678 */ 679 u16 tls_connection_get_cipher_suite(struct tls_connection *conn); 680 681 /** 682 * tls_connection_get_peer_subject - Get peer subject 683 * @conn: Connection context data from tls_connection_init() 684 * Returns: Peer subject or %NULL if not authenticated or not available 685 */ 686 const char * tls_connection_get_peer_subject(struct tls_connection *conn); 687 688 /** 689 * tls_connection_get_own_cert_used - Was own certificate used 690 * @conn: Connection context data from tls_connection_init() 691 * Returns: true if own certificate was used during authentication 692 */ 693 bool tls_connection_get_own_cert_used(struct tls_connection *conn); 694 695 #endif /* TLS_H */ 696
