1 /* $OpenBSD: ssl_sess.c,v 1.128 2024/07/22 14:47:15 jsing Exp $ */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 /* ==================================================================== 59 * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved. 60 * 61 * Redistribution and use in source and binary forms, with or without 62 * modification, are permitted provided that the following conditions 63 * are met: 64 * 65 * 1. Redistributions of source code must retain the above copyright 66 * notice, this list of conditions and the following disclaimer. 67 * 68 * 2. Redistributions in binary form must reproduce the above copyright 69 * notice, this list of conditions and the following disclaimer in 70 * the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3. All advertising materials mentioning features or use of this 74 * software must display the following acknowledgment: 75 * "This product includes software developed by the OpenSSL Project 76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 77 * 78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 79 * endorse or promote products derived from this software without 80 * prior written permission. For written permission, please contact 81 * openssl-core@openssl.org. 82 * 83 * 5. Products derived from this software may not be called "OpenSSL" 84 * nor may "OpenSSL" appear in their names without prior written 85 * permission of the OpenSSL Project. 86 * 87 * 6. Redistributions of any form whatsoever must retain the following 88 * acknowledgment: 89 * "This product includes software developed by the OpenSSL Project 90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 91 * 92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 103 * OF THE POSSIBILITY OF SUCH DAMAGE. 104 * ==================================================================== 105 * 106 * This product includes cryptographic software written by Eric Young 107 * (eay@cryptsoft.com). This product includes software written by Tim 108 * Hudson (tjh@cryptsoft.com). 109 * 110 */ 111 /* ==================================================================== 112 * Copyright 2005 Nokia. All rights reserved. 113 * 114 * The portions of the attached software ("Contribution") is developed by 115 * Nokia Corporation and is licensed pursuant to the OpenSSL open source 116 * license. 117 * 118 * The Contribution, originally written by Mika Kousa and Pasi Eronen of 119 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites 120 * support (see RFC 4279) to OpenSSL. 121 * 122 * No patent licenses or other rights except those expressly stated in 123 * the OpenSSL open source license shall be deemed granted or received 124 * expressly, by implication, estoppel, or otherwise. 125 * 126 * No assurances are provided by Nokia that the Contribution does not 127 * infringe the patent or other intellectual property rights of any third 128 * party or that the license provides you with all the necessary rights 129 * to make use of the Contribution. 130 * 131 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN 132 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA 133 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY 134 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR 135 * OTHERWISE. 136 */ 137 138 #include <openssl/lhash.h> 139 #include <openssl/opensslconf.h> 140 141 #include "ssl_local.h" 142 143 static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s); 144 static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s); 145 static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck); 146 147 /* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */ 148 SSL_SESSION * 149 SSL_get_session(const SSL *ssl) 150 { 151 return (ssl->session); 152 } 153 LSSL_ALIAS(SSL_get_session); 154 155 /* variant of SSL_get_session: caller really gets something */ 156 SSL_SESSION * 157 SSL_get1_session(SSL *ssl) 158 { 159 SSL_SESSION *sess; 160 161 /* 162 * Need to lock this all up rather than just use CRYPTO_add so that 163 * somebody doesn't free ssl->session between when we check it's 164 * non-null and when we up the reference count. 165 */ 166 CRYPTO_w_lock(CRYPTO_LOCK_SSL_SESSION); 167 sess = ssl->session; 168 if (sess) 169 sess->references++; 170 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_SESSION); 171 172 return (sess); 173 } 174 LSSL_ALIAS(SSL_get1_session); 175 176 int 177 SSL_SESSION_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, 178 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) 179 { 180 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_SESSION, 181 argl, argp, new_func, dup_func, free_func); 182 } 183 LSSL_ALIAS(SSL_SESSION_get_ex_new_index); 184 185 int 186 SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg) 187 { 188 return (CRYPTO_set_ex_data(&s->ex_data, idx, arg)); 189 } 190 LSSL_ALIAS(SSL_SESSION_set_ex_data); 191 192 void * 193 SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx) 194 { 195 return (CRYPTO_get_ex_data(&s->ex_data, idx)); 196 } 197 LSSL_ALIAS(SSL_SESSION_get_ex_data); 198 199 uint32_t 200 SSL_SESSION_get_max_early_data(const SSL_SESSION *s) 201 { 202 return 0; 203 } 204 LSSL_ALIAS(SSL_SESSION_get_max_early_data); 205 206 int 207 SSL_SESSION_set_max_early_data(SSL_SESSION *s, uint32_t max_early_data) 208 { 209 return 1; 210 } 211 LSSL_ALIAS(SSL_SESSION_set_max_early_data); 212 213 SSL_SESSION * 214 SSL_SESSION_new(void) 215 { 216 SSL_SESSION *ss; 217 218 if (!OPENSSL_init_ssl(0, NULL)) { 219 SSLerrorx(SSL_R_LIBRARY_BUG); 220 return(NULL); 221 } 222 223 if ((ss = calloc(1, sizeof(*ss))) == NULL) { 224 SSLerrorx(ERR_R_MALLOC_FAILURE); 225 return (NULL); 226 } 227 228 ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */ 229 ss->references = 1; 230 ss->timeout = 60 * 5 + 4; /* 5 minutes 4 seconds timeout by default */ 231 ss->time = time(NULL); 232 ss->prev = NULL; 233 ss->next = NULL; 234 ss->tlsext_hostname = NULL; 235 236 ss->peer_cert_type = -1; 237 238 ss->tlsext_ecpointformatlist_length = 0; 239 ss->tlsext_ecpointformatlist = NULL; 240 ss->tlsext_supportedgroups_length = 0; 241 ss->tlsext_supportedgroups = NULL; 242 243 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data); 244 245 return (ss); 246 } 247 LSSL_ALIAS(SSL_SESSION_new); 248 249 SSL_SESSION * 250 ssl_session_dup(SSL_SESSION *sess, int include_ticket) 251 { 252 SSL_SESSION *copy; 253 CBS cbs; 254 255 if ((copy = calloc(1, sizeof(*copy))) == NULL) { 256 SSLerrorx(ERR_R_MALLOC_FAILURE); 257 goto err; 258 } 259 260 copy->ssl_version = sess->ssl_version; 261 262 CBS_init(&cbs, sess->master_key, sess->master_key_length); 263 if (!CBS_write_bytes(&cbs, copy->master_key, sizeof(copy->master_key), 264 ©->master_key_length)) 265 goto err; 266 267 CBS_init(&cbs, sess->session_id, sess->session_id_length); 268 if (!CBS_write_bytes(&cbs, copy->session_id, sizeof(copy->session_id), 269 ©->session_id_length)) 270 goto err; 271 272 CBS_init(&cbs, sess->sid_ctx, sess->sid_ctx_length); 273 if (!CBS_write_bytes(&cbs, copy->sid_ctx, sizeof(copy->sid_ctx), 274 ©->sid_ctx_length)) 275 goto err; 276 277 if (sess->peer_cert != NULL) { 278 if (!X509_up_ref(sess->peer_cert)) 279 goto err; 280 copy->peer_cert = sess->peer_cert; 281 } 282 copy->peer_cert_type = sess->peer_cert_type; 283 284 copy->verify_result = sess->verify_result; 285 286 copy->timeout = sess->timeout; 287 copy->time = sess->time; 288 copy->references = 1; 289 290 copy->cipher_value = sess->cipher_value; 291 292 if (sess->tlsext_hostname != NULL) { 293 copy->tlsext_hostname = strdup(sess->tlsext_hostname); 294 if (copy->tlsext_hostname == NULL) 295 goto err; 296 } 297 298 if (include_ticket) { 299 CBS_init(&cbs, sess->tlsext_tick, sess->tlsext_ticklen); 300 if (!CBS_stow(&cbs, ©->tlsext_tick, ©->tlsext_ticklen)) 301 goto err; 302 copy->tlsext_tick_lifetime_hint = 303 sess->tlsext_tick_lifetime_hint; 304 305 /* 306 * XXX - copy sess->resumption_master_secret and all other 307 * TLSv1.3 info here. 308 */ 309 } 310 311 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, copy, 312 ©->ex_data)) 313 goto err; 314 315 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ©->ex_data, 316 &sess->ex_data)) 317 goto err; 318 319 /* Omit prev/next: the new session gets its own slot in the cache. */ 320 321 copy->not_resumable = sess->not_resumable; 322 323 CBS_init(&cbs, sess->tlsext_ecpointformatlist, 324 sess->tlsext_ecpointformatlist_length); 325 if (!CBS_stow(&cbs, ©->tlsext_ecpointformatlist, 326 ©->tlsext_ecpointformatlist_length)) 327 goto err; 328 329 if (sess->tlsext_supportedgroups != NULL) { 330 if ((copy->tlsext_supportedgroups = calloc(sizeof(uint16_t), 331 sess->tlsext_supportedgroups_length)) == NULL) 332 goto err; 333 memcpy(copy->tlsext_supportedgroups, 334 sess->tlsext_supportedgroups, 335 sizeof(uint16_t) * sess->tlsext_supportedgroups_length); 336 copy->tlsext_supportedgroups_length = 337 sess->tlsext_supportedgroups_length; 338 } 339 340 return copy; 341 342 err: 343 SSL_SESSION_free(copy); 344 345 return NULL; 346 } 347 348 const unsigned char * 349 SSL_SESSION_get_id(const SSL_SESSION *ss, unsigned int *len) 350 { 351 if (len != NULL) 352 *len = (unsigned int)ss->session_id_length; 353 return ss->session_id; 354 } 355 LSSL_ALIAS(SSL_SESSION_get_id); 356 357 const unsigned char * 358 SSL_SESSION_get0_id_context(const SSL_SESSION *ss, unsigned int *len) 359 { 360 if (len != NULL) 361 *len = (unsigned int)ss->sid_ctx_length; 362 return ss->sid_ctx; 363 } 364 LSSL_ALIAS(SSL_SESSION_get0_id_context); 365 366 unsigned int 367 SSL_SESSION_get_compress_id(const SSL_SESSION *ss) 368 { 369 return 0; 370 } 371 LSSL_ALIAS(SSL_SESSION_get_compress_id); 372 373 unsigned long 374 SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION *s) 375 { 376 return s->tlsext_tick_lifetime_hint; 377 } 378 LSSL_ALIAS(SSL_SESSION_get_ticket_lifetime_hint); 379 380 int 381 SSL_SESSION_has_ticket(const SSL_SESSION *s) 382 { 383 return (s->tlsext_ticklen > 0) ? 1 : 0; 384 } 385 LSSL_ALIAS(SSL_SESSION_has_ticket); 386 387 /* 388 * SSLv3/TLSv1 has 32 bytes (256 bits) of session ID space. As such, filling 389 * the ID with random gunk repeatedly until we have no conflict is going to 390 * complete in one iteration pretty much "most" of the time (btw: 391 * understatement). So, if it takes us 10 iterations and we still can't avoid 392 * a conflict - well that's a reasonable point to call it quits. Either the 393 * arc4random code is broken or someone is trying to open roughly very close to 394 * 2^128 (or 2^256) SSL sessions to our server. How you might store that many 395 * sessions is perhaps a more interesting question... 396 */ 397 398 #define MAX_SESS_ID_ATTEMPTS 10 399 400 static int 401 def_generate_session_id(const SSL *ssl, unsigned char *id, unsigned int *id_len) 402 { 403 unsigned int retry = 0; 404 405 do { 406 arc4random_buf(id, *id_len); 407 } while (SSL_has_matching_session_id(ssl, id, *id_len) && 408 (++retry < MAX_SESS_ID_ATTEMPTS)); 409 410 if (retry < MAX_SESS_ID_ATTEMPTS) 411 return 1; 412 413 /* else - woops a session_id match */ 414 /* XXX We should also check the external cache -- 415 * but the probability of a collision is negligible, and 416 * we could not prevent the concurrent creation of sessions 417 * with identical IDs since we currently don't have means 418 * to atomically check whether a session ID already exists 419 * and make a reservation for it if it does not 420 * (this problem applies to the internal cache as well). 421 */ 422 return 0; 423 } 424 425 int 426 ssl_get_new_session(SSL *s, int session) 427 { 428 unsigned int tmp; 429 SSL_SESSION *ss = NULL; 430 GEN_SESSION_CB cb = def_generate_session_id; 431 432 /* This gets used by clients and servers. */ 433 434 if ((ss = SSL_SESSION_new()) == NULL) 435 return (0); 436 437 /* If the context has a default timeout, use it */ 438 if (s->session_ctx->session_timeout == 0) 439 ss->timeout = SSL_get_default_timeout(s); 440 else 441 ss->timeout = s->session_ctx->session_timeout; 442 443 if (s->session != NULL) { 444 SSL_SESSION_free(s->session); 445 s->session = NULL; 446 } 447 448 if (session) { 449 switch (s->version) { 450 case TLS1_VERSION: 451 case TLS1_1_VERSION: 452 case TLS1_2_VERSION: 453 case DTLS1_VERSION: 454 case DTLS1_2_VERSION: 455 ss->ssl_version = s->version; 456 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; 457 break; 458 default: 459 SSLerror(s, SSL_R_UNSUPPORTED_SSL_VERSION); 460 SSL_SESSION_free(ss); 461 return (0); 462 } 463 464 /* If RFC4507 ticket use empty session ID. */ 465 if (s->tlsext_ticket_expected) { 466 ss->session_id_length = 0; 467 goto sess_id_done; 468 } 469 470 /* Choose which callback will set the session ID. */ 471 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); 472 if (s->generate_session_id) 473 cb = s->generate_session_id; 474 else if (s->session_ctx->generate_session_id) 475 cb = s->session_ctx->generate_session_id; 476 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); 477 478 /* Choose a session ID. */ 479 tmp = ss->session_id_length; 480 if (!cb(s, ss->session_id, &tmp)) { 481 /* The callback failed */ 482 SSLerror(s, SSL_R_SSL_SESSION_ID_CALLBACK_FAILED); 483 SSL_SESSION_free(ss); 484 return (0); 485 } 486 487 /* 488 * Don't allow the callback to set the session length to zero. 489 * nor set it higher than it was. 490 */ 491 if (tmp == 0 || tmp > ss->session_id_length) { 492 /* The callback set an illegal length */ 493 SSLerror(s, SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH); 494 SSL_SESSION_free(ss); 495 return (0); 496 } 497 ss->session_id_length = tmp; 498 499 /* Finally, check for a conflict. */ 500 if (SSL_has_matching_session_id(s, ss->session_id, 501 ss->session_id_length)) { 502 SSLerror(s, SSL_R_SSL_SESSION_ID_CONFLICT); 503 SSL_SESSION_free(ss); 504 return (0); 505 } 506 507 sess_id_done: 508 if (s->tlsext_hostname) { 509 ss->tlsext_hostname = strdup(s->tlsext_hostname); 510 if (ss->tlsext_hostname == NULL) { 511 SSLerror(s, ERR_R_INTERNAL_ERROR); 512 SSL_SESSION_free(ss); 513 return 0; 514 } 515 } 516 } else { 517 ss->session_id_length = 0; 518 } 519 520 if (s->sid_ctx_length > sizeof ss->sid_ctx) { 521 SSLerror(s, ERR_R_INTERNAL_ERROR); 522 SSL_SESSION_free(ss); 523 return 0; 524 } 525 526 memcpy(ss->sid_ctx, s->sid_ctx, s->sid_ctx_length); 527 ss->sid_ctx_length = s->sid_ctx_length; 528 s->session = ss; 529 ss->ssl_version = s->version; 530 ss->verify_result = X509_V_OK; 531 532 return (1); 533 } 534 535 static SSL_SESSION * 536 ssl_session_from_cache(SSL *s, CBS *session_id) 537 { 538 SSL_SESSION *sess; 539 SSL_SESSION data; 540 541 if ((s->session_ctx->session_cache_mode & 542 SSL_SESS_CACHE_NO_INTERNAL_LOOKUP)) 543 return NULL; 544 545 memset(&data, 0, sizeof(data)); 546 547 data.ssl_version = s->version; 548 549 if (!CBS_write_bytes(session_id, data.session_id, 550 sizeof(data.session_id), &data.session_id_length)) 551 return NULL; 552 553 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); 554 sess = lh_SSL_SESSION_retrieve(s->session_ctx->sessions, &data); 555 if (sess != NULL) 556 CRYPTO_add(&sess->references, 1, CRYPTO_LOCK_SSL_SESSION); 557 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); 558 559 if (sess == NULL) 560 s->session_ctx->stats.sess_miss++; 561 562 return sess; 563 } 564 565 static SSL_SESSION * 566 ssl_session_from_callback(SSL *s, CBS *session_id) 567 { 568 SSL_SESSION *sess; 569 int copy; 570 571 if (s->session_ctx->get_session_cb == NULL) 572 return NULL; 573 574 copy = 1; 575 if ((sess = s->session_ctx->get_session_cb(s, 576 CBS_data(session_id), CBS_len(session_id), ©)) == NULL) 577 return NULL; 578 /* 579 * The copy handler may have set copy == 0 to indicate that the session 580 * structures are shared between threads and that it handles the 581 * reference count itself. If it didn't set copy to zero, we must 582 * increment the reference count. 583 */ 584 if (copy) 585 CRYPTO_add(&sess->references, 1, CRYPTO_LOCK_SSL_SESSION); 586 587 s->session_ctx->stats.sess_cb_hit++; 588 589 /* Add the externally cached session to the internal cache as well. */ 590 if (!(s->session_ctx->session_cache_mode & 591 SSL_SESS_CACHE_NO_INTERNAL_STORE)) { 592 /* 593 * The following should not return 1, 594 * otherwise, things are very strange. 595 */ 596 SSL_CTX_add_session(s->session_ctx, sess); 597 } 598 599 return sess; 600 } 601 602 static SSL_SESSION * 603 ssl_session_by_id(SSL *s, CBS *session_id) 604 { 605 SSL_SESSION *sess; 606 607 if (CBS_len(session_id) == 0) 608 return NULL; 609 610 if ((sess = ssl_session_from_cache(s, session_id)) == NULL) 611 sess = ssl_session_from_callback(s, session_id); 612 613 return sess; 614 } 615 616 /* 617 * ssl_get_prev_session attempts to find an SSL_SESSION to be used to resume 618 * this connection. It is only called by servers. 619 * 620 * session_id: points at the session ID in the ClientHello. This code will 621 * read past the end of this in order to parse out the session ticket 622 * extension, if any. 623 * ext_block: a CBS for the ClientHello extensions block. 624 * alert: alert that the caller should send in case of failure. 625 * 626 * Returns: 627 * -1: error 628 * 0: a session may have been found. 629 * 630 * Side effects: 631 * - If a session is found then s->session is pointed at it (after freeing 632 * an existing session if need be) and s->verify_result is set from the 633 * session. 634 * - For both new and resumed sessions, s->tlsext_ticket_expected 635 * indicates whether the server should issue a new session ticket or not. 636 */ 637 int 638 ssl_get_prev_session(SSL *s, CBS *session_id, CBS *ext_block, int *alert) 639 { 640 SSL_SESSION *sess = NULL; 641 int alert_desc = SSL_AD_INTERNAL_ERROR, fatal = 0; 642 int ticket_decrypted = 0; 643 644 /* This is used only by servers. */ 645 646 if (CBS_len(session_id) > SSL_MAX_SSL_SESSION_ID_LENGTH) 647 goto err; 648 649 /* Sets s->tlsext_ticket_expected. */ 650 switch (tls1_process_ticket(s, ext_block, &alert_desc, &sess)) { 651 case TLS1_TICKET_FATAL_ERROR: 652 fatal = 1; 653 goto err; 654 case TLS1_TICKET_NONE: 655 case TLS1_TICKET_EMPTY: 656 if ((sess = ssl_session_by_id(s, session_id)) == NULL) 657 goto err; 658 break; 659 case TLS1_TICKET_NOT_DECRYPTED: 660 goto err; 661 case TLS1_TICKET_DECRYPTED: 662 ticket_decrypted = 1; 663 664 /* 665 * The session ID is used by some clients to detect that the 666 * ticket has been accepted so we copy it into sess. 667 */ 668 if (!CBS_write_bytes(session_id, sess->session_id, 669 sizeof(sess->session_id), &sess->session_id_length)) { 670 fatal = 1; 671 goto err; 672 } 673 break; 674 default: 675 SSLerror(s, ERR_R_INTERNAL_ERROR); 676 fatal = 1; 677 goto err; 678 } 679 680 /* Now sess is non-NULL and we own one of its reference counts. */ 681 682 if (sess->sid_ctx_length != s->sid_ctx_length || 683 timingsafe_memcmp(sess->sid_ctx, s->sid_ctx, 684 sess->sid_ctx_length) != 0) { 685 /* 686 * We have the session requested by the client, but we don't 687 * want to use it in this context. Treat it like a cache miss. 688 */ 689 goto err; 690 } 691 692 if ((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0) { 693 /* 694 * We can't be sure if this session is being used out of 695 * context, which is especially important for SSL_VERIFY_PEER. 696 * The application should have used 697 * SSL[_CTX]_set_session_id_context. 698 * 699 * For this error case, we generate an error instead of treating 700 * the event like a cache miss (otherwise it would be easy for 701 * applications to effectively disable the session cache by 702 * accident without anyone noticing). 703 */ 704 SSLerror(s, SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED); 705 fatal = 1; 706 goto err; 707 } 708 709 if (sess->timeout < (time(NULL) - sess->time)) { 710 s->session_ctx->stats.sess_timeout++; 711 if (!ticket_decrypted) { 712 /* The session was from the cache, so remove it. */ 713 SSL_CTX_remove_session(s->session_ctx, sess); 714 } 715 goto err; 716 } 717 718 s->session_ctx->stats.sess_hit++; 719 720 SSL_SESSION_free(s->session); 721 s->session = sess; 722 s->verify_result = s->session->verify_result; 723 724 return 1; 725 726 err: 727 SSL_SESSION_free(sess); 728 if (ticket_decrypted) { 729 /* 730 * The session was from a ticket. Issue a ticket for the new 731 * session. 732 */ 733 s->tlsext_ticket_expected = 1; 734 } 735 if (fatal) { 736 *alert = alert_desc; 737 return -1; 738 } 739 return 0; 740 } 741 742 int 743 SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c) 744 { 745 int ret = 0; 746 SSL_SESSION *s; 747 748 /* 749 * Add just 1 reference count for the SSL_CTX's session cache 750 * even though it has two ways of access: each session is in a 751 * doubly linked list and an lhash. 752 */ 753 CRYPTO_add(&c->references, 1, CRYPTO_LOCK_SSL_SESSION); 754 755 /* 756 * If session c is in already in cache, we take back the increment 757 * later. 758 */ 759 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 760 s = lh_SSL_SESSION_insert(ctx->sessions, c); 761 762 /* 763 * s != NULL iff we already had a session with the given PID. 764 * In this case, s == c should hold (then we did not really modify 765 * ctx->sessions), or we're in trouble. 766 */ 767 if (s != NULL && s != c) { 768 /* We *are* in trouble ... */ 769 SSL_SESSION_list_remove(ctx, s); 770 SSL_SESSION_free(s); 771 /* 772 * ... so pretend the other session did not exist in cache 773 * (we cannot handle two SSL_SESSION structures with identical 774 * session ID in the same cache, which could happen e.g. when 775 * two threads concurrently obtain the same session from an 776 * external cache). 777 */ 778 s = NULL; 779 } 780 781 /* Put at the head of the queue unless it is already in the cache */ 782 if (s == NULL) 783 SSL_SESSION_list_add(ctx, c); 784 785 if (s != NULL) { 786 /* 787 * existing cache entry -- decrement previously incremented 788 * reference count because it already takes into account the 789 * cache. 790 */ 791 SSL_SESSION_free(s); /* s == c */ 792 ret = 0; 793 } else { 794 /* 795 * New cache entry -- remove old ones if cache has become 796 * too large. 797 */ 798 799 ret = 1; 800 801 if (SSL_CTX_sess_get_cache_size(ctx) > 0) { 802 while (SSL_CTX_sess_number(ctx) > 803 SSL_CTX_sess_get_cache_size(ctx)) { 804 if (!remove_session_lock(ctx, 805 ctx->session_cache_tail, 0)) 806 break; 807 else 808 ctx->stats.sess_cache_full++; 809 } 810 } 811 } 812 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 813 return (ret); 814 } 815 LSSL_ALIAS(SSL_CTX_add_session); 816 817 int 818 SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c) 819 { 820 return remove_session_lock(ctx, c, 1); 821 } 822 LSSL_ALIAS(SSL_CTX_remove_session); 823 824 static int 825 remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck) 826 { 827 SSL_SESSION *r; 828 int ret = 0; 829 830 if (c == NULL || c->session_id_length == 0) 831 return 0; 832 833 if (lck) 834 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 835 if ((r = lh_SSL_SESSION_retrieve(ctx->sessions, c)) == c) { 836 ret = 1; 837 r = lh_SSL_SESSION_delete(ctx->sessions, c); 838 SSL_SESSION_list_remove(ctx, c); 839 } 840 if (lck) 841 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 842 843 if (ret) { 844 r->not_resumable = 1; 845 if (ctx->remove_session_cb != NULL) 846 ctx->remove_session_cb(ctx, r); 847 SSL_SESSION_free(r); 848 } 849 850 return ret; 851 } 852 853 void 854 SSL_SESSION_free(SSL_SESSION *ss) 855 { 856 int i; 857 858 if (ss == NULL) 859 return; 860 861 i = CRYPTO_add(&ss->references, -1, CRYPTO_LOCK_SSL_SESSION); 862 if (i > 0) 863 return; 864 865 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data); 866 867 explicit_bzero(ss->master_key, sizeof ss->master_key); 868 explicit_bzero(ss->session_id, sizeof ss->session_id); 869 870 X509_free(ss->peer_cert); 871 872 free(ss->tlsext_hostname); 873 free(ss->tlsext_tick); 874 free(ss->tlsext_ecpointformatlist); 875 free(ss->tlsext_supportedgroups); 876 877 tls13_secret_cleanup(&ss->resumption_master_secret); 878 879 freezero(ss, sizeof(*ss)); 880 } 881 LSSL_ALIAS(SSL_SESSION_free); 882 883 int 884 SSL_SESSION_up_ref(SSL_SESSION *ss) 885 { 886 return CRYPTO_add(&ss->references, 1, CRYPTO_LOCK_SSL_SESSION) > 1; 887 } 888 LSSL_ALIAS(SSL_SESSION_up_ref); 889 890 int 891 SSL_set_session(SSL *s, SSL_SESSION *session) 892 { 893 const SSL_METHOD *method; 894 895 if (session == NULL) { 896 SSL_SESSION_free(s->session); 897 s->session = NULL; 898 899 return SSL_set_ssl_method(s, s->ctx->method); 900 } 901 902 if ((method = ssl_get_method(session->ssl_version)) == NULL) { 903 SSLerror(s, SSL_R_UNABLE_TO_FIND_SSL_METHOD); 904 return (0); 905 } 906 907 if (!SSL_set_ssl_method(s, method)) 908 return (0); 909 910 CRYPTO_add(&session->references, 1, CRYPTO_LOCK_SSL_SESSION); 911 SSL_SESSION_free(s->session); 912 s->session = session; 913 s->verify_result = s->session->verify_result; 914 915 return (1); 916 } 917 LSSL_ALIAS(SSL_set_session); 918 919 size_t 920 SSL_SESSION_get_master_key(const SSL_SESSION *ss, unsigned char *out, 921 size_t max_out) 922 { 923 size_t len = ss->master_key_length; 924 925 if (out == NULL) 926 return len; 927 928 if (len > max_out) 929 len = max_out; 930 931 memcpy(out, ss->master_key, len); 932 933 return len; 934 } 935 LSSL_ALIAS(SSL_SESSION_get_master_key); 936 937 long 938 SSL_SESSION_set_timeout(SSL_SESSION *s, long t) 939 { 940 if (s == NULL) 941 return (0); 942 s->timeout = t; 943 return (1); 944 } 945 LSSL_ALIAS(SSL_SESSION_set_timeout); 946 947 long 948 SSL_SESSION_get_timeout(const SSL_SESSION *s) 949 { 950 if (s == NULL) 951 return (0); 952 return (s->timeout); 953 } 954 LSSL_ALIAS(SSL_SESSION_get_timeout); 955 956 /* XXX 2038 */ 957 long 958 SSL_SESSION_get_time(const SSL_SESSION *s) 959 { 960 if (s == NULL) 961 return (0); 962 return (s->time); 963 } 964 LSSL_ALIAS(SSL_SESSION_get_time); 965 966 /* XXX 2038 */ 967 long 968 SSL_SESSION_set_time(SSL_SESSION *s, long t) 969 { 970 if (s == NULL) 971 return (0); 972 s->time = t; 973 return (t); 974 } 975 LSSL_ALIAS(SSL_SESSION_set_time); 976 977 int 978 SSL_SESSION_get_protocol_version(const SSL_SESSION *s) 979 { 980 return s->ssl_version; 981 } 982 LSSL_ALIAS(SSL_SESSION_get_protocol_version); 983 984 const SSL_CIPHER * 985 SSL_SESSION_get0_cipher(const SSL_SESSION *s) 986 { 987 return ssl3_get_cipher_by_value(s->cipher_value); 988 } 989 LSSL_ALIAS(SSL_SESSION_get0_cipher); 990 991 X509 * 992 SSL_SESSION_get0_peer(SSL_SESSION *s) 993 { 994 return s->peer_cert; 995 } 996 LSSL_ALIAS(SSL_SESSION_get0_peer); 997 998 int 999 SSL_SESSION_set1_id(SSL_SESSION *s, const unsigned char *sid, 1000 unsigned int sid_len) 1001 { 1002 if (sid_len > SSL_MAX_SSL_SESSION_ID_LENGTH) { 1003 SSLerrorx(SSL_R_SSL_SESSION_ID_TOO_LONG); 1004 return 0; 1005 } 1006 s->session_id_length = sid_len; 1007 memmove(s->session_id, sid, sid_len); 1008 return 1; 1009 } 1010 LSSL_ALIAS(SSL_SESSION_set1_id); 1011 1012 int 1013 SSL_SESSION_set1_id_context(SSL_SESSION *s, const unsigned char *sid_ctx, 1014 unsigned int sid_ctx_len) 1015 { 1016 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { 1017 SSLerrorx(SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); 1018 return 0; 1019 } 1020 s->sid_ctx_length = sid_ctx_len; 1021 memcpy(s->sid_ctx, sid_ctx, sid_ctx_len); 1022 1023 return 1; 1024 } 1025 LSSL_ALIAS(SSL_SESSION_set1_id_context); 1026 1027 int 1028 SSL_SESSION_is_resumable(const SSL_SESSION *s) 1029 { 1030 return 0; 1031 } 1032 LSSL_ALIAS(SSL_SESSION_is_resumable); 1033 1034 long 1035 SSL_CTX_set_timeout(SSL_CTX *s, long t) 1036 { 1037 long l; 1038 1039 if (s == NULL) 1040 return (0); 1041 l = s->session_timeout; 1042 s->session_timeout = t; 1043 1044 return (l); 1045 } 1046 LSSL_ALIAS(SSL_CTX_set_timeout); 1047 1048 long 1049 SSL_CTX_get_timeout(const SSL_CTX *s) 1050 { 1051 if (s == NULL) 1052 return (0); 1053 return (s->session_timeout); 1054 } 1055 LSSL_ALIAS(SSL_CTX_get_timeout); 1056 1057 int 1058 SSL_set_session_secret_cb(SSL *s, int (*tls_session_secret_cb)(SSL *s, 1059 void *secret, int *secret_len, STACK_OF(SSL_CIPHER) *peer_ciphers, 1060 SSL_CIPHER **cipher, void *arg), void *arg) 1061 { 1062 if (s == NULL) 1063 return (0); 1064 s->tls_session_secret_cb = tls_session_secret_cb; 1065 s->tls_session_secret_cb_arg = arg; 1066 return (1); 1067 } 1068 LSSL_ALIAS(SSL_set_session_secret_cb); 1069 1070 int 1071 SSL_set_session_ticket_ext_cb(SSL *s, tls_session_ticket_ext_cb_fn cb, 1072 void *arg) 1073 { 1074 if (s == NULL) 1075 return (0); 1076 s->tls_session_ticket_ext_cb = cb; 1077 s->tls_session_ticket_ext_cb_arg = arg; 1078 return (1); 1079 } 1080 LSSL_ALIAS(SSL_set_session_ticket_ext_cb); 1081 1082 int 1083 SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len) 1084 { 1085 if (s->version >= TLS1_VERSION) { 1086 free(s->tlsext_session_ticket); 1087 s->tlsext_session_ticket = 1088 malloc(sizeof(TLS_SESSION_TICKET_EXT) + ext_len); 1089 if (!s->tlsext_session_ticket) { 1090 SSLerror(s, ERR_R_MALLOC_FAILURE); 1091 return 0; 1092 } 1093 1094 if (ext_data) { 1095 s->tlsext_session_ticket->length = ext_len; 1096 s->tlsext_session_ticket->data = 1097 s->tlsext_session_ticket + 1; 1098 memcpy(s->tlsext_session_ticket->data, 1099 ext_data, ext_len); 1100 } else { 1101 s->tlsext_session_ticket->length = 0; 1102 s->tlsext_session_ticket->data = NULL; 1103 } 1104 1105 return 1; 1106 } 1107 1108 return 0; 1109 } 1110 LSSL_ALIAS(SSL_set_session_ticket_ext); 1111 1112 typedef struct timeout_param_st { 1113 SSL_CTX *ctx; 1114 long time; 1115 struct lhash_st_SSL_SESSION *cache; 1116 } TIMEOUT_PARAM; 1117 1118 static void 1119 timeout_doall_arg(SSL_SESSION *s, TIMEOUT_PARAM *p) 1120 { 1121 if ((p->time == 0) || (p->time > (s->time + s->timeout))) { 1122 /* timeout */ 1123 /* The reason we don't call SSL_CTX_remove_session() is to 1124 * save on locking overhead */ 1125 (void)lh_SSL_SESSION_delete(p->cache, s); 1126 SSL_SESSION_list_remove(p->ctx, s); 1127 s->not_resumable = 1; 1128 if (p->ctx->remove_session_cb != NULL) 1129 p->ctx->remove_session_cb(p->ctx, s); 1130 SSL_SESSION_free(s); 1131 } 1132 } 1133 1134 static void 1135 timeout_LHASH_DOALL_ARG(void *arg1, void *arg2) 1136 { 1137 SSL_SESSION *a = arg1; 1138 TIMEOUT_PARAM *b = arg2; 1139 1140 timeout_doall_arg(a, b); 1141 } 1142 1143 /* XXX 2038 */ 1144 void 1145 SSL_CTX_flush_sessions(SSL_CTX *s, long t) 1146 { 1147 TIMEOUT_PARAM tp; 1148 1149 tp.ctx = s; 1150 tp.cache = s->sessions; 1151 if (tp.cache == NULL) 1152 return; 1153 tp.time = t; 1154 1155 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 1156 lh_SSL_SESSION_doall_arg(tp.cache, timeout_LHASH_DOALL_ARG, 1157 TIMEOUT_PARAM, &tp); 1158 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 1159 } 1160 LSSL_ALIAS(SSL_CTX_flush_sessions); 1161 1162 int 1163 ssl_clear_bad_session(SSL *s) 1164 { 1165 if ((s->session != NULL) && !(s->shutdown & SSL_SENT_SHUTDOWN) && 1166 !(SSL_in_init(s) || SSL_in_before(s))) { 1167 SSL_CTX_remove_session(s->ctx, s->session); 1168 return (1); 1169 } else 1170 return (0); 1171 } 1172 1173 /* locked by SSL_CTX in the calling function */ 1174 static void 1175 SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s) 1176 { 1177 if (s->next == NULL || s->prev == NULL) 1178 return; 1179 1180 if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail)) { 1181 /* last element in list */ 1182 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { 1183 /* only one element in list */ 1184 ctx->session_cache_head = NULL; 1185 ctx->session_cache_tail = NULL; 1186 } else { 1187 ctx->session_cache_tail = s->prev; 1188 s->prev->next = 1189 (SSL_SESSION *)&(ctx->session_cache_tail); 1190 } 1191 } else { 1192 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { 1193 /* first element in list */ 1194 ctx->session_cache_head = s->next; 1195 s->next->prev = 1196 (SSL_SESSION *)&(ctx->session_cache_head); 1197 } else { 1198 /* middle of list */ 1199 s->next->prev = s->prev; 1200 s->prev->next = s->next; 1201 } 1202 } 1203 s->prev = s->next = NULL; 1204 } 1205 1206 static void 1207 SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s) 1208 { 1209 if (s->next != NULL && s->prev != NULL) 1210 SSL_SESSION_list_remove(ctx, s); 1211 1212 if (ctx->session_cache_head == NULL) { 1213 ctx->session_cache_head = s; 1214 ctx->session_cache_tail = s; 1215 s->prev = (SSL_SESSION *)&(ctx->session_cache_head); 1216 s->next = (SSL_SESSION *)&(ctx->session_cache_tail); 1217 } else { 1218 s->next = ctx->session_cache_head; 1219 s->next->prev = s; 1220 s->prev = (SSL_SESSION *)&(ctx->session_cache_head); 1221 ctx->session_cache_head = s; 1222 } 1223 } 1224 1225 void 1226 SSL_CTX_sess_set_new_cb(SSL_CTX *ctx, 1227 int (*cb)(struct ssl_st *ssl, SSL_SESSION *sess)) { 1228 ctx->new_session_cb = cb; 1229 } 1230 LSSL_ALIAS(SSL_CTX_sess_set_new_cb); 1231 1232 int 1233 (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx))(SSL *ssl, SSL_SESSION *sess) 1234 { 1235 return ctx->new_session_cb; 1236 } 1237 LSSL_ALIAS(SSL_CTX_sess_get_new_cb); 1238 1239 void 1240 SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx, 1241 void (*cb)(SSL_CTX *ctx, SSL_SESSION *sess)) 1242 { 1243 ctx->remove_session_cb = cb; 1244 } 1245 LSSL_ALIAS(SSL_CTX_sess_set_remove_cb); 1246 1247 void 1248 (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx))(SSL_CTX * ctx, SSL_SESSION *sess) 1249 { 1250 return ctx->remove_session_cb; 1251 } 1252 LSSL_ALIAS(SSL_CTX_sess_get_remove_cb); 1253 1254 void 1255 SSL_CTX_sess_set_get_cb(SSL_CTX *ctx, SSL_SESSION *(*cb)(struct ssl_st *ssl, 1256 const unsigned char *data, int len, int *copy)) 1257 { 1258 ctx->get_session_cb = cb; 1259 } 1260 LSSL_ALIAS(SSL_CTX_sess_set_get_cb); 1261 1262 SSL_SESSION * 1263 (*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx))(SSL *ssl, const unsigned char *data, 1264 int len, int *copy) 1265 { 1266 return ctx->get_session_cb; 1267 } 1268 LSSL_ALIAS(SSL_CTX_sess_get_get_cb); 1269 1270 void 1271 SSL_CTX_set_info_callback(SSL_CTX *ctx, 1272 void (*cb)(const SSL *ssl, int type, int val)) 1273 { 1274 ctx->info_callback = cb; 1275 } 1276 LSSL_ALIAS(SSL_CTX_set_info_callback); 1277 1278 void 1279 (*SSL_CTX_get_info_callback(SSL_CTX *ctx))(const SSL *ssl, int type, int val) 1280 { 1281 return ctx->info_callback; 1282 } 1283 LSSL_ALIAS(SSL_CTX_get_info_callback); 1284 1285 void 1286 SSL_CTX_set_client_cert_cb(SSL_CTX *ctx, 1287 int (*cb)(SSL *ssl, X509 **x509, EVP_PKEY **pkey)) 1288 { 1289 ctx->client_cert_cb = cb; 1290 } 1291 LSSL_ALIAS(SSL_CTX_set_client_cert_cb); 1292 1293 int 1294 (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx))(SSL * ssl, X509 ** x509, 1295 EVP_PKEY **pkey) 1296 { 1297 return ctx->client_cert_cb; 1298 } 1299 LSSL_ALIAS(SSL_CTX_get_client_cert_cb); 1300 1301 void 1302 SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx, 1303 int (*cb)(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len)) 1304 { 1305 ctx->app_gen_cookie_cb = cb; 1306 } 1307 LSSL_ALIAS(SSL_CTX_set_cookie_generate_cb); 1308 1309 void 1310 SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx, 1311 int (*cb)(SSL *ssl, const unsigned char *cookie, unsigned int cookie_len)) 1312 { 1313 ctx->app_verify_cookie_cb = cb; 1314 } 1315 LSSL_ALIAS(SSL_CTX_set_cookie_verify_cb); 1316 1317 int 1318 PEM_write_SSL_SESSION(FILE *fp, SSL_SESSION *x) 1319 { 1320 return PEM_ASN1_write((i2d_of_void *)i2d_SSL_SESSION, 1321 PEM_STRING_SSL_SESSION, fp, x, NULL, NULL, 0, NULL, NULL); 1322 } 1323 LSSL_ALIAS(PEM_write_SSL_SESSION); 1324 1325 SSL_SESSION * 1326 PEM_read_SSL_SESSION(FILE *fp, SSL_SESSION **x, pem_password_cb *cb, void *u) 1327 { 1328 return PEM_ASN1_read((d2i_of_void *)d2i_SSL_SESSION, 1329 PEM_STRING_SSL_SESSION, fp, (void **)x, cb, u); 1330 } 1331 LSSL_ALIAS(PEM_read_SSL_SESSION); 1332 1333 SSL_SESSION * 1334 PEM_read_bio_SSL_SESSION(BIO *bp, SSL_SESSION **x, pem_password_cb *cb, void *u) 1335 { 1336 return PEM_ASN1_read_bio((d2i_of_void *)d2i_SSL_SESSION, 1337 PEM_STRING_SSL_SESSION, bp, (void **)x, cb, u); 1338 } 1339 LSSL_ALIAS(PEM_read_bio_SSL_SESSION); 1340 1341 int 1342 PEM_write_bio_SSL_SESSION(BIO *bp, SSL_SESSION *x) 1343 { 1344 return PEM_ASN1_write_bio((i2d_of_void *)i2d_SSL_SESSION, 1345 PEM_STRING_SSL_SESSION, bp, x, NULL, NULL, 0, NULL, NULL); 1346 } 1347 LSSL_ALIAS(PEM_write_bio_SSL_SESSION); 1348