ssl_sess.c revision 325337
1/* ssl/ssl_sess.c */ 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 <stdio.h> 139#include <openssl/lhash.h> 140#include <openssl/rand.h> 141#ifndef OPENSSL_NO_ENGINE 142# include <openssl/engine.h> 143#endif 144#include "ssl_locl.h" 145 146static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s); 147static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s); 148static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck); 149 150SSL_SESSION *SSL_get_session(const SSL *ssl) 151/* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */ 152{ 153 return (ssl->session); 154} 155 156SSL_SESSION *SSL_get1_session(SSL *ssl) 157/* variant of SSL_get_session: caller really gets something */ 158{ 159 SSL_SESSION *sess; 160 /* 161 * Need to lock this all up rather than just use CRYPTO_add so that 162 * somebody doesn't free ssl->session between when we check it's non-null 163 * and when we up the reference count. 164 */ 165 CRYPTO_w_lock(CRYPTO_LOCK_SSL_SESSION); 166 sess = ssl->session; 167 if (sess) 168 sess->references++; 169 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_SESSION); 170 return (sess); 171} 172 173int SSL_SESSION_get_ex_new_index(long argl, void *argp, 174 CRYPTO_EX_new *new_func, 175 CRYPTO_EX_dup *dup_func, 176 CRYPTO_EX_free *free_func) 177{ 178 return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_SESSION, argl, argp, 179 new_func, dup_func, free_func); 180} 181 182int SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg) 183{ 184 return (CRYPTO_set_ex_data(&s->ex_data, idx, arg)); 185} 186 187void *SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx) 188{ 189 return (CRYPTO_get_ex_data(&s->ex_data, idx)); 190} 191 192SSL_SESSION *SSL_SESSION_new(void) 193{ 194 SSL_SESSION *ss; 195 196 ss = (SSL_SESSION *)OPENSSL_malloc(sizeof(SSL_SESSION)); 197 if (ss == NULL) { 198 SSLerr(SSL_F_SSL_SESSION_NEW, ERR_R_MALLOC_FAILURE); 199 return (0); 200 } 201 memset(ss, 0, sizeof(SSL_SESSION)); 202 203 ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */ 204 ss->references = 1; 205 ss->timeout = 60 * 5 + 4; /* 5 minute timeout by default */ 206 ss->time = (unsigned long)time(NULL); 207 ss->prev = NULL; 208 ss->next = NULL; 209 ss->compress_meth = 0; 210#ifndef OPENSSL_NO_TLSEXT 211 ss->tlsext_hostname = NULL; 212# ifndef OPENSSL_NO_EC 213 ss->tlsext_ecpointformatlist_length = 0; 214 ss->tlsext_ecpointformatlist = NULL; 215 ss->tlsext_ellipticcurvelist_length = 0; 216 ss->tlsext_ellipticcurvelist = NULL; 217# endif 218#endif 219 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data); 220#ifndef OPENSSL_NO_PSK 221 ss->psk_identity_hint = NULL; 222 ss->psk_identity = NULL; 223#endif 224#ifndef OPENSSL_NO_SRP 225 ss->srp_username = NULL; 226#endif 227 return (ss); 228} 229 230/* 231 * Create a new SSL_SESSION and duplicate the contents of |src| into it. If 232 * ticket == 0 then no ticket information is duplicated, otherwise it is. 233 */ 234SSL_SESSION *ssl_session_dup(SSL_SESSION *src, int ticket) 235{ 236 SSL_SESSION *dest; 237 238 dest = OPENSSL_malloc(sizeof(*src)); 239 if (dest == NULL) { 240 goto err; 241 } 242 memcpy(dest, src, sizeof(*dest)); 243 244 /* 245 * Set the various pointers to NULL so that we can call SSL_SESSION_free in 246 * the case of an error whilst halfway through constructing dest 247 */ 248#ifndef OPENSSL_NO_PSK 249 dest->psk_identity_hint = NULL; 250 dest->psk_identity = NULL; 251#endif 252 dest->ciphers = NULL; 253#ifndef OPENSSL_NO_TLSEXT 254 dest->tlsext_hostname = NULL; 255# ifndef OPENSSL_NO_EC 256 dest->tlsext_ecpointformatlist = NULL; 257 dest->tlsext_ellipticcurvelist = NULL; 258# endif 259 dest->tlsext_tick = NULL; 260#endif 261#ifndef OPENSSL_NO_SRP 262 dest->srp_username = NULL; 263#endif 264 265 /* We deliberately don't copy the prev and next pointers */ 266 dest->prev = NULL; 267 dest->next = NULL; 268 269 dest->references = 1; 270 271 if (src->sess_cert != NULL) 272 CRYPTO_add(&src->sess_cert->references, 1, CRYPTO_LOCK_SSL_SESS_CERT); 273 274 if (src->peer != NULL) 275 CRYPTO_add(&src->peer->references, 1, CRYPTO_LOCK_X509); 276 277 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, dest, &dest->ex_data)) 278 goto err; 279 280#ifndef OPENSSL_NO_PSK 281 if (src->psk_identity_hint) { 282 dest->psk_identity_hint = BUF_strdup(src->psk_identity_hint); 283 if (dest->psk_identity_hint == NULL) { 284 goto err; 285 } 286 } 287 if (src->psk_identity) { 288 dest->psk_identity = BUF_strdup(src->psk_identity); 289 if (dest->psk_identity == NULL) { 290 goto err; 291 } 292 } 293#endif 294 295 if(src->ciphers != NULL) { 296 dest->ciphers = sk_SSL_CIPHER_dup(src->ciphers); 297 if (dest->ciphers == NULL) 298 goto err; 299 } 300 301 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, 302 &dest->ex_data, &src->ex_data)) { 303 goto err; 304 } 305 306#ifndef OPENSSL_NO_TLSEXT 307 if (src->tlsext_hostname) { 308 dest->tlsext_hostname = BUF_strdup(src->tlsext_hostname); 309 if (dest->tlsext_hostname == NULL) { 310 goto err; 311 } 312 } 313# ifndef OPENSSL_NO_EC 314 if (src->tlsext_ecpointformatlist) { 315 dest->tlsext_ecpointformatlist = 316 BUF_memdup(src->tlsext_ecpointformatlist, 317 src->tlsext_ecpointformatlist_length); 318 if (dest->tlsext_ecpointformatlist == NULL) 319 goto err; 320 } 321 if (src->tlsext_ellipticcurvelist) { 322 dest->tlsext_ellipticcurvelist = 323 BUF_memdup(src->tlsext_ellipticcurvelist, 324 src->tlsext_ellipticcurvelist_length); 325 if (dest->tlsext_ellipticcurvelist == NULL) 326 goto err; 327 } 328# endif 329 330 if (ticket != 0 && src->tlsext_tick != NULL) { 331 dest->tlsext_tick = BUF_memdup(src->tlsext_tick, src->tlsext_ticklen); 332 if(dest->tlsext_tick == NULL) 333 goto err; 334 } else { 335 dest->tlsext_tick_lifetime_hint = 0; 336 dest->tlsext_ticklen = 0; 337 } 338#endif 339 340#ifndef OPENSSL_NO_SRP 341 if (src->srp_username) { 342 dest->srp_username = BUF_strdup(src->srp_username); 343 if (dest->srp_username == NULL) { 344 goto err; 345 } 346 } 347#endif 348 349 return dest; 350err: 351 SSLerr(SSL_F_SSL_SESSION_DUP, ERR_R_MALLOC_FAILURE); 352 SSL_SESSION_free(dest); 353 return NULL; 354} 355 356const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *s, 357 unsigned int *len) 358{ 359 if (len) 360 *len = s->session_id_length; 361 return s->session_id; 362} 363 364unsigned int SSL_SESSION_get_compress_id(const SSL_SESSION *s) 365{ 366 return s->compress_meth; 367} 368 369/* 370 * Even with SSLv2, we have 16 bytes (128 bits) of session ID space. 371 * SSLv3/TLSv1 has 32 bytes (256 bits). As such, filling the ID with random 372 * gunk repeatedly until we have no conflict is going to complete in one 373 * iteration pretty much "most" of the time (btw: understatement). So, if it 374 * takes us 10 iterations and we still can't avoid a conflict - well that's a 375 * reasonable point to call it quits. Either the RAND code is broken or 376 * someone is trying to open roughly very close to 2^128 (or 2^256) SSL 377 * sessions to our server. How you might store that many sessions is perhaps 378 * a more interesting question ... 379 */ 380 381#define MAX_SESS_ID_ATTEMPTS 10 382static int def_generate_session_id(const SSL *ssl, unsigned char *id, 383 unsigned int *id_len) 384{ 385 unsigned int retry = 0; 386 do 387 if (RAND_bytes(id, *id_len) <= 0) 388 return 0; 389 while (SSL_has_matching_session_id(ssl, id, *id_len) && 390 (++retry < MAX_SESS_ID_ATTEMPTS)) ; 391 if (retry < MAX_SESS_ID_ATTEMPTS) 392 return 1; 393 /* else - woops a session_id match */ 394 /* 395 * XXX We should also check the external cache -- but the probability of 396 * a collision is negligible, and we could not prevent the concurrent 397 * creation of sessions with identical IDs since we currently don't have 398 * means to atomically check whether a session ID already exists and make 399 * a reservation for it if it does not (this problem applies to the 400 * internal cache as well). 401 */ 402 return 0; 403} 404 405int ssl_get_new_session(SSL *s, int session) 406{ 407 /* This gets used by clients and servers. */ 408 409 unsigned int tmp; 410 SSL_SESSION *ss = NULL; 411 GEN_SESSION_CB cb = def_generate_session_id; 412 413 if ((ss = SSL_SESSION_new()) == NULL) 414 return (0); 415 416 /* If the context has a default timeout, use it */ 417 if (s->session_ctx->session_timeout == 0) 418 ss->timeout = SSL_get_default_timeout(s); 419 else 420 ss->timeout = s->session_ctx->session_timeout; 421 422 if (s->session != NULL) { 423 SSL_SESSION_free(s->session); 424 s->session = NULL; 425 } 426 427 if (session) { 428 if (s->version == SSL2_VERSION) { 429 ss->ssl_version = SSL2_VERSION; 430 ss->session_id_length = SSL2_SSL_SESSION_ID_LENGTH; 431 } else if (s->version == SSL3_VERSION) { 432 ss->ssl_version = SSL3_VERSION; 433 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; 434 } else if (s->version == TLS1_VERSION) { 435 ss->ssl_version = TLS1_VERSION; 436 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; 437 } else if (s->version == TLS1_1_VERSION) { 438 ss->ssl_version = TLS1_1_VERSION; 439 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; 440 } else if (s->version == TLS1_2_VERSION) { 441 ss->ssl_version = TLS1_2_VERSION; 442 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; 443 } else if (s->version == DTLS1_BAD_VER) { 444 ss->ssl_version = DTLS1_BAD_VER; 445 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; 446 } else if (s->version == DTLS1_VERSION) { 447 ss->ssl_version = DTLS1_VERSION; 448 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; 449 } else if (s->version == DTLS1_2_VERSION) { 450 ss->ssl_version = DTLS1_2_VERSION; 451 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; 452 } else { 453 SSLerr(SSL_F_SSL_GET_NEW_SESSION, SSL_R_UNSUPPORTED_SSL_VERSION); 454 SSL_SESSION_free(ss); 455 return (0); 456 } 457#ifndef OPENSSL_NO_TLSEXT 458 /*- 459 * If RFC5077 ticket, use empty session ID (as server). 460 * Note that: 461 * (a) ssl_get_prev_session() does lookahead into the 462 * ClientHello extensions to find the session ticket. 463 * When ssl_get_prev_session() fails, s3_srvr.c calls 464 * ssl_get_new_session() in ssl3_get_client_hello(). 465 * At that point, it has not yet parsed the extensions, 466 * however, because of the lookahead, it already knows 467 * whether a ticket is expected or not. 468 * 469 * (b) s3_clnt.c calls ssl_get_new_session() before parsing 470 * ServerHello extensions, and before recording the session 471 * ID received from the server, so this block is a noop. 472 */ 473 if (s->tlsext_ticket_expected) { 474 ss->session_id_length = 0; 475 goto sess_id_done; 476 } 477#endif 478 /* Choose which callback will set the session ID */ 479 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); 480 if (s->generate_session_id) 481 cb = s->generate_session_id; 482 else if (s->session_ctx->generate_session_id) 483 cb = s->session_ctx->generate_session_id; 484 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); 485 /* Choose a session ID */ 486 tmp = ss->session_id_length; 487 if (!cb(s, ss->session_id, &tmp)) { 488 /* The callback failed */ 489 SSLerr(SSL_F_SSL_GET_NEW_SESSION, 490 SSL_R_SSL_SESSION_ID_CALLBACK_FAILED); 491 SSL_SESSION_free(ss); 492 return (0); 493 } 494 /* 495 * Don't allow the callback to set the session length to zero. nor 496 * set it higher than it was. 497 */ 498 if (!tmp || (tmp > ss->session_id_length)) { 499 /* The callback set an illegal length */ 500 SSLerr(SSL_F_SSL_GET_NEW_SESSION, 501 SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH); 502 SSL_SESSION_free(ss); 503 return (0); 504 } 505 /* If the session length was shrunk and we're SSLv2, pad it */ 506 if ((tmp < ss->session_id_length) && (s->version == SSL2_VERSION)) 507 memset(ss->session_id + tmp, 0, ss->session_id_length - tmp); 508 else 509 ss->session_id_length = tmp; 510 /* Finally, check for a conflict */ 511 if (SSL_has_matching_session_id(s, ss->session_id, 512 ss->session_id_length)) { 513 SSLerr(SSL_F_SSL_GET_NEW_SESSION, SSL_R_SSL_SESSION_ID_CONFLICT); 514 SSL_SESSION_free(ss); 515 return (0); 516 } 517#ifndef OPENSSL_NO_TLSEXT 518 sess_id_done: 519 if (s->tlsext_hostname) { 520 ss->tlsext_hostname = BUF_strdup(s->tlsext_hostname); 521 if (ss->tlsext_hostname == NULL) { 522 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR); 523 SSL_SESSION_free(ss); 524 return 0; 525 } 526 } 527#endif 528 } else { 529 ss->session_id_length = 0; 530 } 531 532 if (s->sid_ctx_length > sizeof ss->sid_ctx) { 533 SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR); 534 SSL_SESSION_free(ss); 535 return 0; 536 } 537 memcpy(ss->sid_ctx, s->sid_ctx, s->sid_ctx_length); 538 ss->sid_ctx_length = s->sid_ctx_length; 539 s->session = ss; 540 ss->ssl_version = s->version; 541 ss->verify_result = X509_V_OK; 542 543 return (1); 544} 545 546/*- 547 * ssl_get_prev attempts to find an SSL_SESSION to be used to resume this 548 * connection. It is only called by servers. 549 * 550 * session_id: points at the session ID in the ClientHello. This code will 551 * read past the end of this in order to parse out the session ticket 552 * extension, if any. 553 * len: the length of the session ID. 554 * limit: a pointer to the first byte after the ClientHello. 555 * 556 * Returns: 557 * -1: error 558 * 0: a session may have been found. 559 * 560 * Side effects: 561 * - If a session is found then s->session is pointed at it (after freeing an 562 * existing session if need be) and s->verify_result is set from the session. 563 * - Both for new and resumed sessions, s->tlsext_ticket_expected is set to 1 564 * if the server should issue a new session ticket (to 0 otherwise). 565 */ 566int ssl_get_prev_session(SSL *s, unsigned char *session_id, int len, 567 const unsigned char *limit) 568{ 569 /* This is used only by servers. */ 570 571 SSL_SESSION *ret = NULL; 572 int fatal = 0; 573 int try_session_cache = 1; 574#ifndef OPENSSL_NO_TLSEXT 575 int r; 576#endif 577 578 if (limit - session_id < len) { 579 fatal = 1; 580 goto err; 581 } 582 583 if (len == 0) 584 try_session_cache = 0; 585 586#ifndef OPENSSL_NO_TLSEXT 587 /* sets s->tlsext_ticket_expected */ 588 r = tls1_process_ticket(s, session_id, len, limit, &ret); 589 switch (r) { 590 case -1: /* Error during processing */ 591 fatal = 1; 592 goto err; 593 case 0: /* No ticket found */ 594 case 1: /* Zero length ticket found */ 595 break; /* Ok to carry on processing session id. */ 596 case 2: /* Ticket found but not decrypted. */ 597 case 3: /* Ticket decrypted, *ret has been set. */ 598 try_session_cache = 0; 599 break; 600 default: 601 abort(); 602 } 603#endif 604 605 if (try_session_cache && 606 ret == NULL && 607 !(s->session_ctx->session_cache_mode & 608 SSL_SESS_CACHE_NO_INTERNAL_LOOKUP)) { 609 SSL_SESSION data; 610 data.ssl_version = s->version; 611 data.session_id_length = len; 612 if (len == 0) 613 return 0; 614 memcpy(data.session_id, session_id, len); 615 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); 616 ret = lh_SSL_SESSION_retrieve(s->session_ctx->sessions, &data); 617 if (ret != NULL) { 618 /* don't allow other threads to steal it: */ 619 CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_SSL_SESSION); 620 } 621 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); 622 if (ret == NULL) 623 s->session_ctx->stats.sess_miss++; 624 } 625 626 if (try_session_cache && 627 ret == NULL && s->session_ctx->get_session_cb != NULL) { 628 int copy = 1; 629 630 if ((ret = s->session_ctx->get_session_cb(s, session_id, len, ©))) { 631 s->session_ctx->stats.sess_cb_hit++; 632 633 /* 634 * Increment reference count now if the session callback asks us 635 * to do so (note that if the session structures returned by the 636 * callback are shared between threads, it must handle the 637 * reference count itself [i.e. copy == 0], or things won't be 638 * thread-safe). 639 */ 640 if (copy) 641 CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_SSL_SESSION); 642 643 /* 644 * Add the externally cached session to the internal cache as 645 * well if and only if we are supposed to. 646 */ 647 if (! 648 (s->session_ctx->session_cache_mode & 649 SSL_SESS_CACHE_NO_INTERNAL_STORE)) 650 /* 651 * The following should not return 1, otherwise, things are 652 * very strange 653 */ 654 SSL_CTX_add_session(s->session_ctx, ret); 655 } 656 } 657 658 if (ret == NULL) 659 goto err; 660 661 /* Now ret is non-NULL and we own one of its reference counts. */ 662 663 if (ret->sid_ctx_length != s->sid_ctx_length 664 || memcmp(ret->sid_ctx, s->sid_ctx, ret->sid_ctx_length)) { 665 /* 666 * We have the session requested by the client, but we don't want to 667 * use it in this context. 668 */ 669 goto err; /* treat like cache miss */ 670 } 671 672 if ((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0) { 673 /* 674 * We can't be sure if this session is being used out of context, 675 * which is especially important for SSL_VERIFY_PEER. The application 676 * should have used SSL[_CTX]_set_session_id_context. For this error 677 * case, we generate an error instead of treating the event like a 678 * cache miss (otherwise it would be easy for applications to 679 * effectively disable the session cache by accident without anyone 680 * noticing). 681 */ 682 683 SSLerr(SSL_F_SSL_GET_PREV_SESSION, 684 SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED); 685 fatal = 1; 686 goto err; 687 } 688 689 if (ret->cipher == NULL) { 690 unsigned char buf[5], *p; 691 unsigned long l; 692 693 p = buf; 694 l = ret->cipher_id; 695 l2n(l, p); 696 if ((ret->ssl_version >> 8) >= SSL3_VERSION_MAJOR) 697 ret->cipher = ssl_get_cipher_by_char(s, &(buf[2])); 698 else 699 ret->cipher = ssl_get_cipher_by_char(s, &(buf[1])); 700 if (ret->cipher == NULL) 701 goto err; 702 } 703 704 if (ret->timeout < (long)(time(NULL) - ret->time)) { /* timeout */ 705 s->session_ctx->stats.sess_timeout++; 706 if (try_session_cache) { 707 /* session was from the cache, so remove it */ 708 SSL_CTX_remove_session(s->session_ctx, ret); 709 } 710 goto err; 711 } 712 713 s->session_ctx->stats.sess_hit++; 714 715 if (s->session != NULL) 716 SSL_SESSION_free(s->session); 717 s->session = ret; 718 s->verify_result = s->session->verify_result; 719 return 1; 720 721 err: 722 if (ret != NULL) { 723 SSL_SESSION_free(ret); 724#ifndef OPENSSL_NO_TLSEXT 725 if (!try_session_cache) { 726 /* 727 * The session was from a ticket, so we should issue a ticket for 728 * the new session 729 */ 730 s->tlsext_ticket_expected = 1; 731 } 732#endif 733 } 734 if (fatal) 735 return -1; 736 else 737 return 0; 738} 739 740int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c) 741{ 742 int ret = 0; 743 SSL_SESSION *s; 744 745 /* 746 * add just 1 reference count for the SSL_CTX's session cache even though 747 * it has two ways of access: each session is in a doubly linked list and 748 * an lhash 749 */ 750 CRYPTO_add(&c->references, 1, CRYPTO_LOCK_SSL_SESSION); 751 /* 752 * if session c is in already in cache, we take back the increment later 753 */ 754 755 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 756 s = lh_SSL_SESSION_insert(ctx->sessions, c); 757 758 /* 759 * s != NULL iff we already had a session with the given PID. In this 760 * case, s == c should hold (then we did not really modify 761 * ctx->sessions), or we're in trouble. 762 */ 763 if (s != NULL && s != c) { 764 /* We *are* in trouble ... */ 765 SSL_SESSION_list_remove(ctx, s); 766 SSL_SESSION_free(s); 767 /* 768 * ... so pretend the other session did not exist in cache (we cannot 769 * handle two SSL_SESSION structures with identical session ID in the 770 * same cache, which could happen e.g. when two threads concurrently 771 * obtain the same session from an external cache) 772 */ 773 s = NULL; 774 } else if (s == NULL && 775 lh_SSL_SESSION_retrieve(ctx->sessions, c) == NULL) { 776 /* s == NULL can also mean OOM error in lh_SSL_SESSION_insert ... */ 777 778 /* 779 * ... so take back the extra reference and also don't add 780 * the session to the SSL_SESSION_list at this time 781 */ 782 s = c; 783 } 784 785 /* Put at the head of the queue unless it is already in the cache */ 786 if (s == NULL) 787 SSL_SESSION_list_add(ctx, c); 788 789 if (s != NULL) { 790 /* 791 * existing cache entry -- decrement previously incremented reference 792 * count because it already takes into account the cache 793 */ 794 795 SSL_SESSION_free(s); /* s == c */ 796 ret = 0; 797 } else { 798 /* 799 * new cache entry -- remove old ones if cache has become too large 800 */ 801 802 ret = 1; 803 804 if (SSL_CTX_sess_get_cache_size(ctx) > 0) { 805 while (SSL_CTX_sess_number(ctx) > 806 SSL_CTX_sess_get_cache_size(ctx)) { 807 if (!remove_session_lock(ctx, ctx->session_cache_tail, 0)) 808 break; 809 else 810 ctx->stats.sess_cache_full++; 811 } 812 } 813 } 814 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 815 return (ret); 816} 817 818int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c) 819{ 820 return remove_session_lock(ctx, c, 1); 821} 822 823static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck) 824{ 825 SSL_SESSION *r; 826 int ret = 0; 827 828 if ((c != NULL) && (c->session_id_length != 0)) { 829 if (lck) 830 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 831 if ((r = lh_SSL_SESSION_retrieve(ctx->sessions, c)) == c) { 832 ret = 1; 833 r = lh_SSL_SESSION_delete(ctx->sessions, c); 834 SSL_SESSION_list_remove(ctx, c); 835 } 836 837 if (lck) 838 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 839 840 if (ret) { 841 r->not_resumable = 1; 842 if (ctx->remove_session_cb != NULL) 843 ctx->remove_session_cb(ctx, r); 844 SSL_SESSION_free(r); 845 } 846 } else 847 ret = 0; 848 return (ret); 849} 850 851void SSL_SESSION_free(SSL_SESSION *ss) 852{ 853 int i; 854 855 if (ss == NULL) 856 return; 857 858 i = CRYPTO_add(&ss->references, -1, CRYPTO_LOCK_SSL_SESSION); 859#ifdef REF_PRINT 860 REF_PRINT("SSL_SESSION", ss); 861#endif 862 if (i > 0) 863 return; 864#ifdef REF_CHECK 865 if (i < 0) { 866 fprintf(stderr, "SSL_SESSION_free, bad reference count\n"); 867 abort(); /* ok */ 868 } 869#endif 870 871 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data); 872 873 OPENSSL_cleanse(ss->key_arg, sizeof ss->key_arg); 874 OPENSSL_cleanse(ss->master_key, sizeof ss->master_key); 875 OPENSSL_cleanse(ss->session_id, sizeof ss->session_id); 876 if (ss->sess_cert != NULL) 877 ssl_sess_cert_free(ss->sess_cert); 878 if (ss->peer != NULL) 879 X509_free(ss->peer); 880 if (ss->ciphers != NULL) 881 sk_SSL_CIPHER_free(ss->ciphers); 882#ifndef OPENSSL_NO_TLSEXT 883 if (ss->tlsext_hostname != NULL) 884 OPENSSL_free(ss->tlsext_hostname); 885 if (ss->tlsext_tick != NULL) 886 OPENSSL_free(ss->tlsext_tick); 887# ifndef OPENSSL_NO_EC 888 ss->tlsext_ecpointformatlist_length = 0; 889 if (ss->tlsext_ecpointformatlist != NULL) 890 OPENSSL_free(ss->tlsext_ecpointformatlist); 891 ss->tlsext_ellipticcurvelist_length = 0; 892 if (ss->tlsext_ellipticcurvelist != NULL) 893 OPENSSL_free(ss->tlsext_ellipticcurvelist); 894# endif /* OPENSSL_NO_EC */ 895#endif 896#ifndef OPENSSL_NO_PSK 897 if (ss->psk_identity_hint != NULL) 898 OPENSSL_free(ss->psk_identity_hint); 899 if (ss->psk_identity != NULL) 900 OPENSSL_free(ss->psk_identity); 901#endif 902#ifndef OPENSSL_NO_SRP 903 if (ss->srp_username != NULL) 904 OPENSSL_free(ss->srp_username); 905#endif 906 OPENSSL_cleanse(ss, sizeof(*ss)); 907 OPENSSL_free(ss); 908} 909 910int SSL_set_session(SSL *s, SSL_SESSION *session) 911{ 912 int ret = 0; 913 const SSL_METHOD *meth; 914 915 if (session != NULL) { 916 meth = s->ctx->method->get_ssl_method(session->ssl_version); 917 if (meth == NULL) 918 meth = s->method->get_ssl_method(session->ssl_version); 919 if (meth == NULL) { 920 SSLerr(SSL_F_SSL_SET_SESSION, SSL_R_UNABLE_TO_FIND_SSL_METHOD); 921 return (0); 922 } 923 924 if (meth != s->method) { 925 if (!SSL_set_ssl_method(s, meth)) 926 return (0); 927 } 928#ifndef OPENSSL_NO_KRB5 929 if (s->kssl_ctx && !s->kssl_ctx->client_princ && 930 session->krb5_client_princ_len > 0) { 931 s->kssl_ctx->client_princ = 932 (char *)OPENSSL_malloc(session->krb5_client_princ_len + 1); 933 if (s->kssl_ctx->client_princ == NULL) { 934 SSLerr(SSL_F_SSL_SET_SESSION, ERR_R_MALLOC_FAILURE); 935 return 0; 936 } 937 memcpy(s->kssl_ctx->client_princ, session->krb5_client_princ, 938 session->krb5_client_princ_len); 939 s->kssl_ctx->client_princ[session->krb5_client_princ_len] = '\0'; 940 } 941#endif /* OPENSSL_NO_KRB5 */ 942 943 /* CRYPTO_w_lock(CRYPTO_LOCK_SSL); */ 944 CRYPTO_add(&session->references, 1, CRYPTO_LOCK_SSL_SESSION); 945 if (s->session != NULL) 946 SSL_SESSION_free(s->session); 947 s->session = session; 948 s->verify_result = s->session->verify_result; 949 /* CRYPTO_w_unlock(CRYPTO_LOCK_SSL); */ 950 ret = 1; 951 } else { 952 if (s->session != NULL) { 953 SSL_SESSION_free(s->session); 954 s->session = NULL; 955 } 956 957 meth = s->ctx->method; 958 if (meth != s->method) { 959 if (!SSL_set_ssl_method(s, meth)) 960 return (0); 961 } 962 ret = 1; 963 } 964 return (ret); 965} 966 967long SSL_SESSION_set_timeout(SSL_SESSION *s, long t) 968{ 969 if (s == NULL) 970 return (0); 971 s->timeout = t; 972 return (1); 973} 974 975long SSL_SESSION_get_timeout(const SSL_SESSION *s) 976{ 977 if (s == NULL) 978 return (0); 979 return (s->timeout); 980} 981 982long SSL_SESSION_get_time(const SSL_SESSION *s) 983{ 984 if (s == NULL) 985 return (0); 986 return (s->time); 987} 988 989long SSL_SESSION_set_time(SSL_SESSION *s, long t) 990{ 991 if (s == NULL) 992 return (0); 993 s->time = t; 994 return (t); 995} 996 997X509 *SSL_SESSION_get0_peer(SSL_SESSION *s) 998{ 999 return s->peer; 1000} 1001 1002int SSL_SESSION_set1_id_context(SSL_SESSION *s, const unsigned char *sid_ctx, 1003 unsigned int sid_ctx_len) 1004{ 1005 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { 1006 SSLerr(SSL_F_SSL_SESSION_SET1_ID_CONTEXT, 1007 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); 1008 return 0; 1009 } 1010 s->sid_ctx_length = sid_ctx_len; 1011 if (s->sid_ctx != sid_ctx) 1012 memcpy(s->sid_ctx, sid_ctx, sid_ctx_len); 1013 1014 return 1; 1015} 1016 1017long SSL_CTX_set_timeout(SSL_CTX *s, long t) 1018{ 1019 long l; 1020 if (s == NULL) 1021 return (0); 1022 l = s->session_timeout; 1023 s->session_timeout = t; 1024 return (l); 1025} 1026 1027long SSL_CTX_get_timeout(const SSL_CTX *s) 1028{ 1029 if (s == NULL) 1030 return (0); 1031 return (s->session_timeout); 1032} 1033 1034#ifndef OPENSSL_NO_TLSEXT 1035int SSL_set_session_secret_cb(SSL *s, 1036 int (*tls_session_secret_cb) (SSL *s, 1037 void *secret, 1038 int *secret_len, 1039 STACK_OF(SSL_CIPHER) 1040 *peer_ciphers, 1041 SSL_CIPHER 1042 **cipher, 1043 void *arg), 1044 void *arg) 1045{ 1046 if (s == NULL) 1047 return (0); 1048 s->tls_session_secret_cb = tls_session_secret_cb; 1049 s->tls_session_secret_cb_arg = arg; 1050 return (1); 1051} 1052 1053int SSL_set_session_ticket_ext_cb(SSL *s, tls_session_ticket_ext_cb_fn cb, 1054 void *arg) 1055{ 1056 if (s == NULL) 1057 return (0); 1058 s->tls_session_ticket_ext_cb = cb; 1059 s->tls_session_ticket_ext_cb_arg = arg; 1060 return (1); 1061} 1062 1063int SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len) 1064{ 1065 if (s->version >= TLS1_VERSION) { 1066 if (s->tlsext_session_ticket) { 1067 OPENSSL_free(s->tlsext_session_ticket); 1068 s->tlsext_session_ticket = NULL; 1069 } 1070 1071 s->tlsext_session_ticket = 1072 OPENSSL_malloc(sizeof(TLS_SESSION_TICKET_EXT) + ext_len); 1073 if (!s->tlsext_session_ticket) { 1074 SSLerr(SSL_F_SSL_SET_SESSION_TICKET_EXT, ERR_R_MALLOC_FAILURE); 1075 return 0; 1076 } 1077 1078 if (ext_data) { 1079 s->tlsext_session_ticket->length = ext_len; 1080 s->tlsext_session_ticket->data = s->tlsext_session_ticket + 1; 1081 memcpy(s->tlsext_session_ticket->data, ext_data, ext_len); 1082 } else { 1083 s->tlsext_session_ticket->length = 0; 1084 s->tlsext_session_ticket->data = NULL; 1085 } 1086 1087 return 1; 1088 } 1089 1090 return 0; 1091} 1092#endif /* OPENSSL_NO_TLSEXT */ 1093 1094typedef struct timeout_param_st { 1095 SSL_CTX *ctx; 1096 long time; 1097 LHASH_OF(SSL_SESSION) *cache; 1098} TIMEOUT_PARAM; 1099 1100static void timeout_doall_arg(SSL_SESSION *s, TIMEOUT_PARAM *p) 1101{ 1102 if ((p->time == 0) || (p->time > (s->time + s->timeout))) { /* timeout */ 1103 /* 1104 * The reason we don't call SSL_CTX_remove_session() is to save on 1105 * locking overhead 1106 */ 1107 (void)lh_SSL_SESSION_delete(p->cache, s); 1108 SSL_SESSION_list_remove(p->ctx, s); 1109 s->not_resumable = 1; 1110 if (p->ctx->remove_session_cb != NULL) 1111 p->ctx->remove_session_cb(p->ctx, s); 1112 SSL_SESSION_free(s); 1113 } 1114} 1115 1116static IMPLEMENT_LHASH_DOALL_ARG_FN(timeout, SSL_SESSION, TIMEOUT_PARAM) 1117 1118void SSL_CTX_flush_sessions(SSL_CTX *s, long t) 1119{ 1120 unsigned long i; 1121 TIMEOUT_PARAM tp; 1122 1123 tp.ctx = s; 1124 tp.cache = s->sessions; 1125 if (tp.cache == NULL) 1126 return; 1127 tp.time = t; 1128 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 1129 i = CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load; 1130 CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load = 0; 1131 lh_SSL_SESSION_doall_arg(tp.cache, LHASH_DOALL_ARG_FN(timeout), 1132 TIMEOUT_PARAM, &tp); 1133 CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load = i; 1134 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 1135} 1136 1137int ssl_clear_bad_session(SSL *s) 1138{ 1139 if ((s->session != NULL) && 1140 !(s->shutdown & SSL_SENT_SHUTDOWN) && 1141 !(SSL_in_init(s) || SSL_in_before(s))) { 1142 SSL_CTX_remove_session(s->session_ctx, s->session); 1143 return (1); 1144 } else 1145 return (0); 1146} 1147 1148/* locked by SSL_CTX in the calling function */ 1149static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s) 1150{ 1151 if ((s->next == NULL) || (s->prev == NULL)) 1152 return; 1153 1154 if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail)) { 1155 /* last element in list */ 1156 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { 1157 /* only one element in list */ 1158 ctx->session_cache_head = NULL; 1159 ctx->session_cache_tail = NULL; 1160 } else { 1161 ctx->session_cache_tail = s->prev; 1162 s->prev->next = (SSL_SESSION *)&(ctx->session_cache_tail); 1163 } 1164 } else { 1165 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { 1166 /* first element in list */ 1167 ctx->session_cache_head = s->next; 1168 s->next->prev = (SSL_SESSION *)&(ctx->session_cache_head); 1169 } else { 1170 /* middle of list */ 1171 s->next->prev = s->prev; 1172 s->prev->next = s->next; 1173 } 1174 } 1175 s->prev = s->next = NULL; 1176} 1177 1178static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s) 1179{ 1180 if ((s->next != NULL) && (s->prev != NULL)) 1181 SSL_SESSION_list_remove(ctx, s); 1182 1183 if (ctx->session_cache_head == NULL) { 1184 ctx->session_cache_head = s; 1185 ctx->session_cache_tail = s; 1186 s->prev = (SSL_SESSION *)&(ctx->session_cache_head); 1187 s->next = (SSL_SESSION *)&(ctx->session_cache_tail); 1188 } else { 1189 s->next = ctx->session_cache_head; 1190 s->next->prev = s; 1191 s->prev = (SSL_SESSION *)&(ctx->session_cache_head); 1192 ctx->session_cache_head = s; 1193 } 1194} 1195 1196void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx, 1197 int (*cb) (struct ssl_st *ssl, 1198 SSL_SESSION *sess)) 1199{ 1200 ctx->new_session_cb = cb; 1201} 1202 1203int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx)) (SSL *ssl, SSL_SESSION *sess) { 1204 return ctx->new_session_cb; 1205} 1206 1207void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx, 1208 void (*cb) (SSL_CTX *ctx, SSL_SESSION *sess)) 1209{ 1210 ctx->remove_session_cb = cb; 1211} 1212 1213void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx)) (SSL_CTX *ctx, 1214 SSL_SESSION *sess) { 1215 return ctx->remove_session_cb; 1216} 1217 1218void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx, 1219 SSL_SESSION *(*cb) (struct ssl_st *ssl, 1220 unsigned char *data, int len, 1221 int *copy)) 1222{ 1223 ctx->get_session_cb = cb; 1224} 1225 1226SSL_SESSION *(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx)) (SSL *ssl, 1227 unsigned char *data, 1228 int len, int *copy) { 1229 return ctx->get_session_cb; 1230} 1231 1232void SSL_CTX_set_info_callback(SSL_CTX *ctx, 1233 void (*cb) (const SSL *ssl, int type, int val)) 1234{ 1235 ctx->info_callback = cb; 1236} 1237 1238void (*SSL_CTX_get_info_callback(SSL_CTX *ctx)) (const SSL *ssl, int type, 1239 int val) { 1240 return ctx->info_callback; 1241} 1242 1243void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx, 1244 int (*cb) (SSL *ssl, X509 **x509, 1245 EVP_PKEY **pkey)) 1246{ 1247 ctx->client_cert_cb = cb; 1248} 1249 1250int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx)) (SSL *ssl, X509 **x509, 1251 EVP_PKEY **pkey) { 1252 return ctx->client_cert_cb; 1253} 1254 1255#ifndef OPENSSL_NO_ENGINE 1256int SSL_CTX_set_client_cert_engine(SSL_CTX *ctx, ENGINE *e) 1257{ 1258 if (!ENGINE_init(e)) { 1259 SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, ERR_R_ENGINE_LIB); 1260 return 0; 1261 } 1262 if (!ENGINE_get_ssl_client_cert_function(e)) { 1263 SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, 1264 SSL_R_NO_CLIENT_CERT_METHOD); 1265 ENGINE_finish(e); 1266 return 0; 1267 } 1268 ctx->client_cert_engine = e; 1269 return 1; 1270} 1271#endif 1272 1273void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx, 1274 int (*cb) (SSL *ssl, 1275 unsigned char *cookie, 1276 unsigned int *cookie_len)) 1277{ 1278 ctx->app_gen_cookie_cb = cb; 1279} 1280 1281void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx, 1282 int (*cb) (SSL *ssl, unsigned char *cookie, 1283 unsigned int cookie_len)) 1284{ 1285 ctx->app_verify_cookie_cb = cb; 1286} 1287 1288IMPLEMENT_PEM_rw(SSL_SESSION, SSL_SESSION, PEM_STRING_SSL_SESSION, 1289 SSL_SESSION) 1290