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