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