ssl_sess.c revision 1.124
1/* $OpenBSD: ssl_sess.c,v 1.124 2024/01/24 14:05:10 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 143static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s); 144static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s); 145static 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 */ 148SSL_SESSION * 149SSL_get_session(const SSL *ssl) 150{ 151 return (ssl->session); 152} 153LSSL_ALIAS(SSL_get_session); 154 155/* variant of SSL_get_session: caller really gets something */ 156SSL_SESSION * 157SSL_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} 174LSSL_ALIAS(SSL_get1_session); 175 176int 177SSL_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} 183LSSL_ALIAS(SSL_SESSION_get_ex_new_index); 184 185int 186SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg) 187{ 188 return (CRYPTO_set_ex_data(&s->ex_data, idx, arg)); 189} 190LSSL_ALIAS(SSL_SESSION_set_ex_data); 191 192void * 193SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx) 194{ 195 return (CRYPTO_get_ex_data(&s->ex_data, idx)); 196} 197LSSL_ALIAS(SSL_SESSION_get_ex_data); 198 199uint32_t 200SSL_SESSION_get_max_early_data(const SSL_SESSION *s) 201{ 202 return 0; 203} 204LSSL_ALIAS(SSL_SESSION_get_max_early_data); 205 206int 207SSL_SESSION_set_max_early_data(SSL_SESSION *s, uint32_t max_early_data) 208{ 209 return 1; 210} 211LSSL_ALIAS(SSL_SESSION_set_max_early_data); 212 213SSL_SESSION * 214SSL_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} 247LSSL_ALIAS(SSL_SESSION_new); 248 249SSL_SESSION * 250ssl_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 = sess->cipher; 291 copy->cipher_id = sess->cipher_id; 292 293 if (sess->ciphers != NULL) { 294 if ((copy->ciphers = sk_SSL_CIPHER_dup(sess->ciphers)) == NULL) 295 goto err; 296 } 297 298 if (sess->tlsext_hostname != NULL) { 299 copy->tlsext_hostname = strdup(sess->tlsext_hostname); 300 if (copy->tlsext_hostname == NULL) 301 goto err; 302 } 303 304 if (include_ticket) { 305 CBS_init(&cbs, sess->tlsext_tick, sess->tlsext_ticklen); 306 if (!CBS_stow(&cbs, ©->tlsext_tick, ©->tlsext_ticklen)) 307 goto err; 308 copy->tlsext_tick_lifetime_hint = 309 sess->tlsext_tick_lifetime_hint; 310 311 /* 312 * XXX - copy sess->resumption_master_secret and all other 313 * TLSv1.3 info here. 314 */ 315 } 316 317 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, copy, 318 ©->ex_data)) 319 goto err; 320 321 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ©->ex_data, 322 &sess->ex_data)) 323 goto err; 324 325 /* Omit prev/next: the new session gets its own slot in the cache. */ 326 327 copy->not_resumable = sess->not_resumable; 328 329 CBS_init(&cbs, sess->tlsext_ecpointformatlist, 330 sess->tlsext_ecpointformatlist_length); 331 if (!CBS_stow(&cbs, ©->tlsext_ecpointformatlist, 332 ©->tlsext_ecpointformatlist_length)) 333 goto err; 334 335 if (sess->tlsext_supportedgroups != NULL) { 336 if ((copy->tlsext_supportedgroups = calloc(sizeof(uint16_t), 337 sess->tlsext_supportedgroups_length)) == NULL) 338 goto err; 339 memcpy(copy->tlsext_supportedgroups, 340 sess->tlsext_supportedgroups, 341 sizeof(uint16_t) * sess->tlsext_supportedgroups_length); 342 copy->tlsext_supportedgroups_length = 343 sess->tlsext_supportedgroups_length; 344 } 345 346 return copy; 347 348 err: 349 SSL_SESSION_free(copy); 350 351 return NULL; 352} 353 354const unsigned char * 355SSL_SESSION_get_id(const SSL_SESSION *ss, unsigned int *len) 356{ 357 if (len != NULL) 358 *len = (unsigned int)ss->session_id_length; 359 return ss->session_id; 360} 361LSSL_ALIAS(SSL_SESSION_get_id); 362 363const unsigned char * 364SSL_SESSION_get0_id_context(const SSL_SESSION *ss, unsigned int *len) 365{ 366 if (len != NULL) 367 *len = (unsigned int)ss->sid_ctx_length; 368 return ss->sid_ctx; 369} 370LSSL_ALIAS(SSL_SESSION_get0_id_context); 371 372unsigned int 373SSL_SESSION_get_compress_id(const SSL_SESSION *ss) 374{ 375 return 0; 376} 377LSSL_ALIAS(SSL_SESSION_get_compress_id); 378 379unsigned long 380SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION *s) 381{ 382 return s->tlsext_tick_lifetime_hint; 383} 384LSSL_ALIAS(SSL_SESSION_get_ticket_lifetime_hint); 385 386int 387SSL_SESSION_has_ticket(const SSL_SESSION *s) 388{ 389 return (s->tlsext_ticklen > 0) ? 1 : 0; 390} 391LSSL_ALIAS(SSL_SESSION_has_ticket); 392 393/* 394 * SSLv3/TLSv1 has 32 bytes (256 bits) of session ID space. As such, filling 395 * the ID with random gunk repeatedly until we have no conflict is going to 396 * complete in one iteration pretty much "most" of the time (btw: 397 * understatement). So, if it takes us 10 iterations and we still can't avoid 398 * a conflict - well that's a reasonable point to call it quits. Either the 399 * arc4random code is broken or someone is trying to open roughly very close to 400 * 2^128 (or 2^256) SSL sessions to our server. How you might store that many 401 * sessions is perhaps a more interesting question... 402 */ 403 404#define MAX_SESS_ID_ATTEMPTS 10 405 406static int 407def_generate_session_id(const SSL *ssl, unsigned char *id, unsigned int *id_len) 408{ 409 unsigned int retry = 0; 410 411 do { 412 arc4random_buf(id, *id_len); 413 } while (SSL_has_matching_session_id(ssl, id, *id_len) && 414 (++retry < MAX_SESS_ID_ATTEMPTS)); 415 416 if (retry < MAX_SESS_ID_ATTEMPTS) 417 return 1; 418 419 /* else - woops a session_id match */ 420 /* XXX We should also check the external cache -- 421 * but the probability of a collision is negligible, and 422 * we could not prevent the concurrent creation of sessions 423 * with identical IDs since we currently don't have means 424 * to atomically check whether a session ID already exists 425 * and make a reservation for it if it does not 426 * (this problem applies to the internal cache as well). 427 */ 428 return 0; 429} 430 431int 432ssl_get_new_session(SSL *s, int session) 433{ 434 unsigned int tmp; 435 SSL_SESSION *ss = NULL; 436 GEN_SESSION_CB cb = def_generate_session_id; 437 438 /* This gets used by clients and servers. */ 439 440 if ((ss = SSL_SESSION_new()) == NULL) 441 return (0); 442 443 /* If the context has a default timeout, use it */ 444 if (s->session_ctx->session_timeout == 0) 445 ss->timeout = SSL_get_default_timeout(s); 446 else 447 ss->timeout = s->session_ctx->session_timeout; 448 449 if (s->session != NULL) { 450 SSL_SESSION_free(s->session); 451 s->session = NULL; 452 } 453 454 if (session) { 455 switch (s->version) { 456 case TLS1_VERSION: 457 case TLS1_1_VERSION: 458 case TLS1_2_VERSION: 459 case DTLS1_VERSION: 460 case DTLS1_2_VERSION: 461 ss->ssl_version = s->version; 462 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; 463 break; 464 default: 465 SSLerror(s, SSL_R_UNSUPPORTED_SSL_VERSION); 466 SSL_SESSION_free(ss); 467 return (0); 468 } 469 470 /* If RFC4507 ticket use empty session ID. */ 471 if (s->tlsext_ticket_expected) { 472 ss->session_id_length = 0; 473 goto sess_id_done; 474 } 475 476 /* Choose which callback will set the session ID. */ 477 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); 478 if (s->generate_session_id) 479 cb = s->generate_session_id; 480 else if (s->session_ctx->generate_session_id) 481 cb = s->session_ctx->generate_session_id; 482 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); 483 484 /* Choose a session ID. */ 485 tmp = ss->session_id_length; 486 if (!cb(s, ss->session_id, &tmp)) { 487 /* The callback failed */ 488 SSLerror(s, SSL_R_SSL_SESSION_ID_CALLBACK_FAILED); 489 SSL_SESSION_free(ss); 490 return (0); 491 } 492 493 /* 494 * Don't allow the callback to set the session length to zero. 495 * nor set it higher than it was. 496 */ 497 if (tmp == 0 || tmp > ss->session_id_length) { 498 /* The callback set an illegal length */ 499 SSLerror(s, SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH); 500 SSL_SESSION_free(ss); 501 return (0); 502 } 503 ss->session_id_length = tmp; 504 505 /* Finally, check for a conflict. */ 506 if (SSL_has_matching_session_id(s, ss->session_id, 507 ss->session_id_length)) { 508 SSLerror(s, SSL_R_SSL_SESSION_ID_CONFLICT); 509 SSL_SESSION_free(ss); 510 return (0); 511 } 512 513 sess_id_done: 514 if (s->tlsext_hostname) { 515 ss->tlsext_hostname = strdup(s->tlsext_hostname); 516 if (ss->tlsext_hostname == NULL) { 517 SSLerror(s, ERR_R_INTERNAL_ERROR); 518 SSL_SESSION_free(ss); 519 return 0; 520 } 521 } 522 } else { 523 ss->session_id_length = 0; 524 } 525 526 if (s->sid_ctx_length > sizeof ss->sid_ctx) { 527 SSLerror(s, ERR_R_INTERNAL_ERROR); 528 SSL_SESSION_free(ss); 529 return 0; 530 } 531 532 memcpy(ss->sid_ctx, s->sid_ctx, s->sid_ctx_length); 533 ss->sid_ctx_length = s->sid_ctx_length; 534 s->session = ss; 535 ss->ssl_version = s->version; 536 ss->verify_result = X509_V_OK; 537 538 return (1); 539} 540 541static SSL_SESSION * 542ssl_session_from_cache(SSL *s, CBS *session_id) 543{ 544 SSL_SESSION *sess; 545 SSL_SESSION data; 546 547 if ((s->session_ctx->session_cache_mode & 548 SSL_SESS_CACHE_NO_INTERNAL_LOOKUP)) 549 return NULL; 550 551 memset(&data, 0, sizeof(data)); 552 553 data.ssl_version = s->version; 554 555 if (!CBS_write_bytes(session_id, data.session_id, 556 sizeof(data.session_id), &data.session_id_length)) 557 return NULL; 558 559 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); 560 sess = lh_SSL_SESSION_retrieve(s->session_ctx->sessions, &data); 561 if (sess != NULL) 562 CRYPTO_add(&sess->references, 1, CRYPTO_LOCK_SSL_SESSION); 563 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); 564 565 if (sess == NULL) 566 s->session_ctx->stats.sess_miss++; 567 568 return sess; 569} 570 571static SSL_SESSION * 572ssl_session_from_callback(SSL *s, CBS *session_id) 573{ 574 SSL_SESSION *sess; 575 int copy; 576 577 if (s->session_ctx->get_session_cb == NULL) 578 return NULL; 579 580 copy = 1; 581 if ((sess = s->session_ctx->get_session_cb(s, 582 CBS_data(session_id), CBS_len(session_id), ©)) == NULL) 583 return NULL; 584 /* 585 * The copy handler may have set copy == 0 to indicate that the session 586 * structures are shared between threads and that it handles the 587 * reference count itself. If it didn't set copy to zero, we must 588 * increment the reference count. 589 */ 590 if (copy) 591 CRYPTO_add(&sess->references, 1, CRYPTO_LOCK_SSL_SESSION); 592 593 s->session_ctx->stats.sess_cb_hit++; 594 595 /* Add the externally cached session to the internal cache as well. */ 596 if (!(s->session_ctx->session_cache_mode & 597 SSL_SESS_CACHE_NO_INTERNAL_STORE)) { 598 /* 599 * The following should not return 1, 600 * otherwise, things are very strange. 601 */ 602 SSL_CTX_add_session(s->session_ctx, sess); 603 } 604 605 return sess; 606} 607 608static SSL_SESSION * 609ssl_session_by_id(SSL *s, CBS *session_id) 610{ 611 SSL_SESSION *sess; 612 613 if (CBS_len(session_id) == 0) 614 return NULL; 615 616 if ((sess = ssl_session_from_cache(s, session_id)) == NULL) 617 sess = ssl_session_from_callback(s, session_id); 618 619 return sess; 620} 621 622/* 623 * ssl_get_prev_session attempts to find an SSL_SESSION to be used to resume 624 * this connection. It is only called by servers. 625 * 626 * session_id: points at the session ID in the ClientHello. This code will 627 * read past the end of this in order to parse out the session ticket 628 * extension, if any. 629 * ext_block: a CBS for the ClientHello extensions block. 630 * alert: alert that the caller should send in case of failure. 631 * 632 * Returns: 633 * -1: error 634 * 0: a session may have been found. 635 * 636 * Side effects: 637 * - If a session is found then s->session is pointed at it (after freeing 638 * an existing session if need be) and s->verify_result is set from the 639 * session. 640 * - For both new and resumed sessions, s->tlsext_ticket_expected 641 * indicates whether the server should issue a new session ticket or not. 642 */ 643int 644ssl_get_prev_session(SSL *s, CBS *session_id, CBS *ext_block, int *alert) 645{ 646 SSL_SESSION *sess = NULL; 647 int alert_desc = SSL_AD_INTERNAL_ERROR, fatal = 0; 648 int ticket_decrypted = 0; 649 650 /* This is used only by servers. */ 651 652 if (CBS_len(session_id) > SSL_MAX_SSL_SESSION_ID_LENGTH) 653 goto err; 654 655 /* Sets s->tlsext_ticket_expected. */ 656 switch (tls1_process_ticket(s, ext_block, &alert_desc, &sess)) { 657 case TLS1_TICKET_FATAL_ERROR: 658 fatal = 1; 659 goto err; 660 case TLS1_TICKET_NONE: 661 case TLS1_TICKET_EMPTY: 662 if ((sess = ssl_session_by_id(s, session_id)) == NULL) 663 goto err; 664 break; 665 case TLS1_TICKET_NOT_DECRYPTED: 666 goto err; 667 case TLS1_TICKET_DECRYPTED: 668 ticket_decrypted = 1; 669 670 /* 671 * The session ID is used by some clients to detect that the 672 * ticket has been accepted so we copy it into sess. 673 */ 674 if (!CBS_write_bytes(session_id, sess->session_id, 675 sizeof(sess->session_id), &sess->session_id_length)) { 676 fatal = 1; 677 goto err; 678 } 679 break; 680 default: 681 SSLerror(s, ERR_R_INTERNAL_ERROR); 682 fatal = 1; 683 goto err; 684 } 685 686 /* Now sess is non-NULL and we own one of its reference counts. */ 687 688 if (sess->sid_ctx_length != s->sid_ctx_length || 689 timingsafe_memcmp(sess->sid_ctx, s->sid_ctx, 690 sess->sid_ctx_length) != 0) { 691 /* 692 * We have the session requested by the client, but we don't 693 * want to use it in this context. Treat it like a cache miss. 694 */ 695 goto err; 696 } 697 698 if ((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0) { 699 /* 700 * We can't be sure if this session is being used out of 701 * context, which is especially important for SSL_VERIFY_PEER. 702 * The application should have used 703 * SSL[_CTX]_set_session_id_context. 704 * 705 * For this error case, we generate an error instead of treating 706 * the event like a cache miss (otherwise it would be easy for 707 * applications to effectively disable the session cache by 708 * accident without anyone noticing). 709 */ 710 SSLerror(s, SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED); 711 fatal = 1; 712 goto err; 713 } 714 715 if (sess->cipher == NULL) { 716 sess->cipher = ssl3_get_cipher_by_id(sess->cipher_id); 717 if (sess->cipher == NULL) 718 goto err; 719 } 720 721 if (sess->timeout < (time(NULL) - sess->time)) { 722 s->session_ctx->stats.sess_timeout++; 723 if (!ticket_decrypted) { 724 /* The session was from the cache, so remove it. */ 725 SSL_CTX_remove_session(s->session_ctx, sess); 726 } 727 goto err; 728 } 729 730 s->session_ctx->stats.sess_hit++; 731 732 SSL_SESSION_free(s->session); 733 s->session = sess; 734 s->verify_result = s->session->verify_result; 735 736 return 1; 737 738 err: 739 SSL_SESSION_free(sess); 740 if (ticket_decrypted) { 741 /* 742 * The session was from a ticket. Issue a ticket for the new 743 * session. 744 */ 745 s->tlsext_ticket_expected = 1; 746 } 747 if (fatal) { 748 *alert = alert_desc; 749 return -1; 750 } 751 return 0; 752} 753 754int 755SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c) 756{ 757 int ret = 0; 758 SSL_SESSION *s; 759 760 /* 761 * Add just 1 reference count for the SSL_CTX's session cache 762 * even though it has two ways of access: each session is in a 763 * doubly linked list and an lhash. 764 */ 765 CRYPTO_add(&c->references, 1, CRYPTO_LOCK_SSL_SESSION); 766 767 /* 768 * If session c is in already in cache, we take back the increment 769 * later. 770 */ 771 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 772 s = lh_SSL_SESSION_insert(ctx->sessions, c); 773 774 /* 775 * s != NULL iff we already had a session with the given PID. 776 * In this case, s == c should hold (then we did not really modify 777 * ctx->sessions), or we're in trouble. 778 */ 779 if (s != NULL && s != c) { 780 /* We *are* in trouble ... */ 781 SSL_SESSION_list_remove(ctx, s); 782 SSL_SESSION_free(s); 783 /* 784 * ... so pretend the other session did not exist in cache 785 * (we cannot handle two SSL_SESSION structures with identical 786 * session ID in the same cache, which could happen e.g. when 787 * two threads concurrently obtain the same session from an 788 * external cache). 789 */ 790 s = NULL; 791 } 792 793 /* Put at the head of the queue unless it is already in the cache */ 794 if (s == NULL) 795 SSL_SESSION_list_add(ctx, c); 796 797 if (s != NULL) { 798 /* 799 * existing cache entry -- decrement previously incremented 800 * reference count because it already takes into account the 801 * cache. 802 */ 803 SSL_SESSION_free(s); /* s == c */ 804 ret = 0; 805 } else { 806 /* 807 * New cache entry -- remove old ones if cache has become 808 * too large. 809 */ 810 811 ret = 1; 812 813 if (SSL_CTX_sess_get_cache_size(ctx) > 0) { 814 while (SSL_CTX_sess_number(ctx) > 815 SSL_CTX_sess_get_cache_size(ctx)) { 816 if (!remove_session_lock(ctx, 817 ctx->session_cache_tail, 0)) 818 break; 819 else 820 ctx->stats.sess_cache_full++; 821 } 822 } 823 } 824 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 825 return (ret); 826} 827LSSL_ALIAS(SSL_CTX_add_session); 828 829int 830SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c) 831{ 832 return remove_session_lock(ctx, c, 1); 833} 834LSSL_ALIAS(SSL_CTX_remove_session); 835 836static int 837remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck) 838{ 839 SSL_SESSION *r; 840 int ret = 0; 841 842 if (c == NULL || c->session_id_length == 0) 843 return 0; 844 845 if (lck) 846 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 847 if ((r = lh_SSL_SESSION_retrieve(ctx->sessions, c)) == c) { 848 ret = 1; 849 r = lh_SSL_SESSION_delete(ctx->sessions, c); 850 SSL_SESSION_list_remove(ctx, c); 851 } 852 if (lck) 853 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 854 855 if (ret) { 856 r->not_resumable = 1; 857 if (ctx->remove_session_cb != NULL) 858 ctx->remove_session_cb(ctx, r); 859 SSL_SESSION_free(r); 860 } 861 862 return ret; 863} 864 865void 866SSL_SESSION_free(SSL_SESSION *ss) 867{ 868 int i; 869 870 if (ss == NULL) 871 return; 872 873 i = CRYPTO_add(&ss->references, -1, CRYPTO_LOCK_SSL_SESSION); 874 if (i > 0) 875 return; 876 877 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data); 878 879 explicit_bzero(ss->master_key, sizeof ss->master_key); 880 explicit_bzero(ss->session_id, sizeof ss->session_id); 881 882 X509_free(ss->peer_cert); 883 884 sk_SSL_CIPHER_free(ss->ciphers); 885 886 free(ss->tlsext_hostname); 887 free(ss->tlsext_tick); 888 free(ss->tlsext_ecpointformatlist); 889 free(ss->tlsext_supportedgroups); 890 891 tls13_secret_cleanup(&ss->resumption_master_secret); 892 893 freezero(ss, sizeof(*ss)); 894} 895LSSL_ALIAS(SSL_SESSION_free); 896 897int 898SSL_SESSION_up_ref(SSL_SESSION *ss) 899{ 900 int refs = CRYPTO_add(&ss->references, 1, CRYPTO_LOCK_SSL_SESSION); 901 return (refs > 1) ? 1 : 0; 902} 903LSSL_ALIAS(SSL_SESSION_up_ref); 904 905int 906SSL_set_session(SSL *s, SSL_SESSION *session) 907{ 908 const SSL_METHOD *method; 909 910 if (session == NULL) { 911 SSL_SESSION_free(s->session); 912 s->session = NULL; 913 914 return SSL_set_ssl_method(s, s->ctx->method); 915 } 916 917 if ((method = ssl_get_method(session->ssl_version)) == NULL) { 918 SSLerror(s, SSL_R_UNABLE_TO_FIND_SSL_METHOD); 919 return (0); 920 } 921 922 if (!SSL_set_ssl_method(s, method)) 923 return (0); 924 925 CRYPTO_add(&session->references, 1, CRYPTO_LOCK_SSL_SESSION); 926 SSL_SESSION_free(s->session); 927 s->session = session; 928 s->verify_result = s->session->verify_result; 929 930 return (1); 931} 932LSSL_ALIAS(SSL_set_session); 933 934size_t 935SSL_SESSION_get_master_key(const SSL_SESSION *ss, unsigned char *out, 936 size_t max_out) 937{ 938 size_t len = ss->master_key_length; 939 940 if (out == NULL) 941 return len; 942 943 if (len > max_out) 944 len = max_out; 945 946 memcpy(out, ss->master_key, len); 947 948 return len; 949} 950LSSL_ALIAS(SSL_SESSION_get_master_key); 951 952long 953SSL_SESSION_set_timeout(SSL_SESSION *s, long t) 954{ 955 if (s == NULL) 956 return (0); 957 s->timeout = t; 958 return (1); 959} 960LSSL_ALIAS(SSL_SESSION_set_timeout); 961 962long 963SSL_SESSION_get_timeout(const SSL_SESSION *s) 964{ 965 if (s == NULL) 966 return (0); 967 return (s->timeout); 968} 969LSSL_ALIAS(SSL_SESSION_get_timeout); 970 971/* XXX 2038 */ 972long 973SSL_SESSION_get_time(const SSL_SESSION *s) 974{ 975 if (s == NULL) 976 return (0); 977 return (s->time); 978} 979LSSL_ALIAS(SSL_SESSION_get_time); 980 981/* XXX 2038 */ 982long 983SSL_SESSION_set_time(SSL_SESSION *s, long t) 984{ 985 if (s == NULL) 986 return (0); 987 s->time = t; 988 return (t); 989} 990LSSL_ALIAS(SSL_SESSION_set_time); 991 992int 993SSL_SESSION_get_protocol_version(const SSL_SESSION *s) 994{ 995 return s->ssl_version; 996} 997LSSL_ALIAS(SSL_SESSION_get_protocol_version); 998 999const SSL_CIPHER * 1000SSL_SESSION_get0_cipher(const SSL_SESSION *s) 1001{ 1002 return s->cipher; 1003} 1004LSSL_ALIAS(SSL_SESSION_get0_cipher); 1005 1006X509 * 1007SSL_SESSION_get0_peer(SSL_SESSION *s) 1008{ 1009 return s->peer_cert; 1010} 1011LSSL_ALIAS(SSL_SESSION_get0_peer); 1012 1013int 1014SSL_SESSION_set1_id(SSL_SESSION *s, const unsigned char *sid, 1015 unsigned int sid_len) 1016{ 1017 if (sid_len > SSL_MAX_SSL_SESSION_ID_LENGTH) { 1018 SSLerrorx(SSL_R_SSL_SESSION_ID_TOO_LONG); 1019 return 0; 1020 } 1021 s->session_id_length = sid_len; 1022 memmove(s->session_id, sid, sid_len); 1023 return 1; 1024} 1025LSSL_ALIAS(SSL_SESSION_set1_id); 1026 1027int 1028SSL_SESSION_set1_id_context(SSL_SESSION *s, const unsigned char *sid_ctx, 1029 unsigned int sid_ctx_len) 1030{ 1031 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { 1032 SSLerrorx(SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); 1033 return 0; 1034 } 1035 s->sid_ctx_length = sid_ctx_len; 1036 memcpy(s->sid_ctx, sid_ctx, sid_ctx_len); 1037 1038 return 1; 1039} 1040LSSL_ALIAS(SSL_SESSION_set1_id_context); 1041 1042int 1043SSL_SESSION_is_resumable(const SSL_SESSION *s) 1044{ 1045 return 0; 1046} 1047LSSL_ALIAS(SSL_SESSION_is_resumable); 1048 1049long 1050SSL_CTX_set_timeout(SSL_CTX *s, long t) 1051{ 1052 long l; 1053 1054 if (s == NULL) 1055 return (0); 1056 l = s->session_timeout; 1057 s->session_timeout = t; 1058 1059 return (l); 1060} 1061LSSL_ALIAS(SSL_CTX_set_timeout); 1062 1063long 1064SSL_CTX_get_timeout(const SSL_CTX *s) 1065{ 1066 if (s == NULL) 1067 return (0); 1068 return (s->session_timeout); 1069} 1070LSSL_ALIAS(SSL_CTX_get_timeout); 1071 1072int 1073SSL_set_session_secret_cb(SSL *s, int (*tls_session_secret_cb)(SSL *s, 1074 void *secret, int *secret_len, STACK_OF(SSL_CIPHER) *peer_ciphers, 1075 SSL_CIPHER **cipher, void *arg), void *arg) 1076{ 1077 if (s == NULL) 1078 return (0); 1079 s->tls_session_secret_cb = tls_session_secret_cb; 1080 s->tls_session_secret_cb_arg = arg; 1081 return (1); 1082} 1083LSSL_ALIAS(SSL_set_session_secret_cb); 1084 1085int 1086SSL_set_session_ticket_ext_cb(SSL *s, tls_session_ticket_ext_cb_fn cb, 1087 void *arg) 1088{ 1089 if (s == NULL) 1090 return (0); 1091 s->tls_session_ticket_ext_cb = cb; 1092 s->tls_session_ticket_ext_cb_arg = arg; 1093 return (1); 1094} 1095LSSL_ALIAS(SSL_set_session_ticket_ext_cb); 1096 1097int 1098SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len) 1099{ 1100 if (s->version >= TLS1_VERSION) { 1101 free(s->tlsext_session_ticket); 1102 s->tlsext_session_ticket = 1103 malloc(sizeof(TLS_SESSION_TICKET_EXT) + ext_len); 1104 if (!s->tlsext_session_ticket) { 1105 SSLerror(s, ERR_R_MALLOC_FAILURE); 1106 return 0; 1107 } 1108 1109 if (ext_data) { 1110 s->tlsext_session_ticket->length = ext_len; 1111 s->tlsext_session_ticket->data = 1112 s->tlsext_session_ticket + 1; 1113 memcpy(s->tlsext_session_ticket->data, 1114 ext_data, ext_len); 1115 } else { 1116 s->tlsext_session_ticket->length = 0; 1117 s->tlsext_session_ticket->data = NULL; 1118 } 1119 1120 return 1; 1121 } 1122 1123 return 0; 1124} 1125LSSL_ALIAS(SSL_set_session_ticket_ext); 1126 1127typedef struct timeout_param_st { 1128 SSL_CTX *ctx; 1129 long time; 1130 struct lhash_st_SSL_SESSION *cache; 1131} TIMEOUT_PARAM; 1132 1133static void 1134timeout_doall_arg(SSL_SESSION *s, TIMEOUT_PARAM *p) 1135{ 1136 if ((p->time == 0) || (p->time > (s->time + s->timeout))) { 1137 /* timeout */ 1138 /* The reason we don't call SSL_CTX_remove_session() is to 1139 * save on locking overhead */ 1140 (void)lh_SSL_SESSION_delete(p->cache, s); 1141 SSL_SESSION_list_remove(p->ctx, s); 1142 s->not_resumable = 1; 1143 if (p->ctx->remove_session_cb != NULL) 1144 p->ctx->remove_session_cb(p->ctx, s); 1145 SSL_SESSION_free(s); 1146 } 1147} 1148 1149static void 1150timeout_LHASH_DOALL_ARG(void *arg1, void *arg2) 1151{ 1152 SSL_SESSION *a = arg1; 1153 TIMEOUT_PARAM *b = arg2; 1154 1155 timeout_doall_arg(a, b); 1156} 1157 1158/* XXX 2038 */ 1159void 1160SSL_CTX_flush_sessions(SSL_CTX *s, long t) 1161{ 1162 TIMEOUT_PARAM tp; 1163 1164 tp.ctx = s; 1165 tp.cache = s->sessions; 1166 if (tp.cache == NULL) 1167 return; 1168 tp.time = t; 1169 1170 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 1171 lh_SSL_SESSION_doall_arg(tp.cache, timeout_LHASH_DOALL_ARG, 1172 TIMEOUT_PARAM, &tp); 1173 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 1174} 1175LSSL_ALIAS(SSL_CTX_flush_sessions); 1176 1177int 1178ssl_clear_bad_session(SSL *s) 1179{ 1180 if ((s->session != NULL) && !(s->shutdown & SSL_SENT_SHUTDOWN) && 1181 !(SSL_in_init(s) || SSL_in_before(s))) { 1182 SSL_CTX_remove_session(s->ctx, s->session); 1183 return (1); 1184 } else 1185 return (0); 1186} 1187 1188/* locked by SSL_CTX in the calling function */ 1189static void 1190SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s) 1191{ 1192 if (s->next == NULL || s->prev == NULL) 1193 return; 1194 1195 if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail)) { 1196 /* last element in list */ 1197 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { 1198 /* only one element in list */ 1199 ctx->session_cache_head = NULL; 1200 ctx->session_cache_tail = NULL; 1201 } else { 1202 ctx->session_cache_tail = s->prev; 1203 s->prev->next = 1204 (SSL_SESSION *)&(ctx->session_cache_tail); 1205 } 1206 } else { 1207 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { 1208 /* first element in list */ 1209 ctx->session_cache_head = s->next; 1210 s->next->prev = 1211 (SSL_SESSION *)&(ctx->session_cache_head); 1212 } else { 1213 /* middle of list */ 1214 s->next->prev = s->prev; 1215 s->prev->next = s->next; 1216 } 1217 } 1218 s->prev = s->next = NULL; 1219} 1220 1221static void 1222SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s) 1223{ 1224 if (s->next != NULL && s->prev != NULL) 1225 SSL_SESSION_list_remove(ctx, s); 1226 1227 if (ctx->session_cache_head == NULL) { 1228 ctx->session_cache_head = s; 1229 ctx->session_cache_tail = s; 1230 s->prev = (SSL_SESSION *)&(ctx->session_cache_head); 1231 s->next = (SSL_SESSION *)&(ctx->session_cache_tail); 1232 } else { 1233 s->next = ctx->session_cache_head; 1234 s->next->prev = s; 1235 s->prev = (SSL_SESSION *)&(ctx->session_cache_head); 1236 ctx->session_cache_head = s; 1237 } 1238} 1239 1240void 1241SSL_CTX_sess_set_new_cb(SSL_CTX *ctx, 1242 int (*cb)(struct ssl_st *ssl, SSL_SESSION *sess)) { 1243 ctx->new_session_cb = cb; 1244} 1245LSSL_ALIAS(SSL_CTX_sess_set_new_cb); 1246 1247int 1248(*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx))(SSL *ssl, SSL_SESSION *sess) 1249{ 1250 return ctx->new_session_cb; 1251} 1252LSSL_ALIAS(SSL_CTX_sess_get_new_cb); 1253 1254void 1255SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx, 1256 void (*cb)(SSL_CTX *ctx, SSL_SESSION *sess)) 1257{ 1258 ctx->remove_session_cb = cb; 1259} 1260LSSL_ALIAS(SSL_CTX_sess_set_remove_cb); 1261 1262void 1263(*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx))(SSL_CTX * ctx, SSL_SESSION *sess) 1264{ 1265 return ctx->remove_session_cb; 1266} 1267LSSL_ALIAS(SSL_CTX_sess_get_remove_cb); 1268 1269void 1270SSL_CTX_sess_set_get_cb(SSL_CTX *ctx, SSL_SESSION *(*cb)(struct ssl_st *ssl, 1271 const unsigned char *data, int len, int *copy)) 1272{ 1273 ctx->get_session_cb = cb; 1274} 1275LSSL_ALIAS(SSL_CTX_sess_set_get_cb); 1276 1277SSL_SESSION * 1278(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx))(SSL *ssl, const unsigned char *data, 1279 int len, int *copy) 1280{ 1281 return ctx->get_session_cb; 1282} 1283LSSL_ALIAS(SSL_CTX_sess_get_get_cb); 1284 1285void 1286SSL_CTX_set_info_callback(SSL_CTX *ctx, 1287 void (*cb)(const SSL *ssl, int type, int val)) 1288{ 1289 ctx->info_callback = cb; 1290} 1291LSSL_ALIAS(SSL_CTX_set_info_callback); 1292 1293void 1294(*SSL_CTX_get_info_callback(SSL_CTX *ctx))(const SSL *ssl, int type, int val) 1295{ 1296 return ctx->info_callback; 1297} 1298LSSL_ALIAS(SSL_CTX_get_info_callback); 1299 1300void 1301SSL_CTX_set_client_cert_cb(SSL_CTX *ctx, 1302 int (*cb)(SSL *ssl, X509 **x509, EVP_PKEY **pkey)) 1303{ 1304 ctx->client_cert_cb = cb; 1305} 1306LSSL_ALIAS(SSL_CTX_set_client_cert_cb); 1307 1308int 1309(*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx))(SSL * ssl, X509 ** x509, 1310 EVP_PKEY **pkey) 1311{ 1312 return ctx->client_cert_cb; 1313} 1314LSSL_ALIAS(SSL_CTX_get_client_cert_cb); 1315 1316void 1317SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx, 1318 int (*cb)(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len)) 1319{ 1320 ctx->app_gen_cookie_cb = cb; 1321} 1322LSSL_ALIAS(SSL_CTX_set_cookie_generate_cb); 1323 1324void 1325SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx, 1326 int (*cb)(SSL *ssl, const unsigned char *cookie, unsigned int cookie_len)) 1327{ 1328 ctx->app_verify_cookie_cb = cb; 1329} 1330LSSL_ALIAS(SSL_CTX_set_cookie_verify_cb); 1331 1332int 1333PEM_write_SSL_SESSION(FILE *fp, SSL_SESSION *x) 1334{ 1335 return PEM_ASN1_write((i2d_of_void *)i2d_SSL_SESSION, 1336 PEM_STRING_SSL_SESSION, fp, x, NULL, NULL, 0, NULL, NULL); 1337} 1338LSSL_ALIAS(PEM_write_SSL_SESSION); 1339 1340SSL_SESSION * 1341PEM_read_SSL_SESSION(FILE *fp, SSL_SESSION **x, pem_password_cb *cb, void *u) 1342{ 1343 return PEM_ASN1_read((d2i_of_void *)d2i_SSL_SESSION, 1344 PEM_STRING_SSL_SESSION, fp, (void **)x, cb, u); 1345} 1346LSSL_ALIAS(PEM_read_SSL_SESSION); 1347 1348SSL_SESSION * 1349PEM_read_bio_SSL_SESSION(BIO *bp, SSL_SESSION **x, pem_password_cb *cb, void *u) 1350{ 1351 return PEM_ASN1_read_bio((d2i_of_void *)d2i_SSL_SESSION, 1352 PEM_STRING_SSL_SESSION, bp, (void **)x, cb, u); 1353} 1354LSSL_ALIAS(PEM_read_bio_SSL_SESSION); 1355 1356int 1357PEM_write_bio_SSL_SESSION(BIO *bp, SSL_SESSION *x) 1358{ 1359 return PEM_ASN1_write_bio((i2d_of_void *)i2d_SSL_SESSION, 1360 PEM_STRING_SSL_SESSION, bp, x, NULL, NULL, 0, NULL, NULL); 1361} 1362LSSL_ALIAS(PEM_write_bio_SSL_SESSION); 1363