1 /* 2 * Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved. 3 * Copyright 2005 Nokia. All rights reserved. 4 * 5 * Licensed under the Apache License 2.0 (the "License"). You may not use 6 * this file except in compliance with the License. You can obtain a copy 7 * in the file LICENSE in the source distribution or at 8 * https://www.openssl.org/source/license.html 9 */ 10 11 #if defined(__TANDEM) && defined(_SPT_MODEL_) 12 # include <spthread.h> 13 # include <spt_extensions.h> /* timeval */ 14 #endif 15 #include <stdio.h> 16 #include <openssl/rand.h> 17 #include <openssl/engine.h> 18 #include "internal/refcount.h" 19 #include "internal/cryptlib.h" 20 #include "ssl_local.h" 21 #include "statem/statem_local.h" 22 23 static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s); 24 static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s); 25 static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck); 26 27 DEFINE_STACK_OF(SSL_SESSION) 28 29 __owur static int sess_timedout(time_t t, SSL_SESSION *ss) 30 { 31 /* if timeout overflowed, it can never timeout! */ 32 if (ss->timeout_ovf) 33 return 0; 34 return t > ss->calc_timeout; 35 } 36 37 /* 38 * Returns -1/0/+1 as other XXXcmp-type functions 39 * Takes overflow of calculated timeout into consideration 40 */ 41 __owur static int timeoutcmp(SSL_SESSION *a, SSL_SESSION *b) 42 { 43 /* if only one overflowed, then it is greater */ 44 if (a->timeout_ovf && !b->timeout_ovf) 45 return 1; 46 if (!a->timeout_ovf && b->timeout_ovf) 47 return -1; 48 /* No overflow, or both overflowed, so straight compare is safe */ 49 if (a->calc_timeout < b->calc_timeout) 50 return -1; 51 if (a->calc_timeout > b->calc_timeout) 52 return 1; 53 return 0; 54 } 55 56 /* 57 * Calculates effective timeout, saving overflow state 58 * Locking must be done by the caller of this function 59 */ 60 void ssl_session_calculate_timeout(SSL_SESSION *ss) 61 { 62 /* Force positive timeout */ 63 if (ss->timeout < 0) 64 ss->timeout = 0; 65 ss->calc_timeout = ss->time + ss->timeout; 66 /* 67 * |timeout| is always zero or positive, so the check for 68 * overflow only needs to consider if |time| is positive 69 */ 70 ss->timeout_ovf = ss->time > 0 && ss->calc_timeout < ss->time; 71 /* 72 * N.B. Realistic overflow can only occur in our lifetimes on a 73 * 32-bit machine in January 2038. 74 * However, There are no controls to limit the |timeout| 75 * value, except to keep it positive. 76 */ 77 } 78 79 /* 80 * SSL_get_session() and SSL_get1_session() are problematic in TLS1.3 because, 81 * unlike in earlier protocol versions, the session ticket may not have been 82 * sent yet even though a handshake has finished. The session ticket data could 83 * come in sometime later...or even change if multiple session ticket messages 84 * are sent from the server. The preferred way for applications to obtain 85 * a resumable session is to use SSL_CTX_sess_set_new_cb(). 86 */ 87 88 SSL_SESSION *SSL_get_session(const SSL *ssl) 89 /* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */ 90 { 91 return ssl->session; 92 } 93 94 SSL_SESSION *SSL_get1_session(SSL *ssl) 95 /* variant of SSL_get_session: caller really gets something */ 96 { 97 SSL_SESSION *sess; 98 /* 99 * Need to lock this all up rather than just use CRYPTO_add so that 100 * somebody doesn't free ssl->session between when we check it's non-null 101 * and when we up the reference count. 102 */ 103 if (!CRYPTO_THREAD_read_lock(ssl->lock)) 104 return NULL; 105 sess = ssl->session; 106 if (sess) 107 SSL_SESSION_up_ref(sess); 108 CRYPTO_THREAD_unlock(ssl->lock); 109 return sess; 110 } 111 112 int SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg) 113 { 114 return CRYPTO_set_ex_data(&s->ex_data, idx, arg); 115 } 116 117 void *SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx) 118 { 119 return CRYPTO_get_ex_data(&s->ex_data, idx); 120 } 121 122 SSL_SESSION *SSL_SESSION_new(void) 123 { 124 SSL_SESSION *ss; 125 126 if (!OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL)) 127 return NULL; 128 129 ss = OPENSSL_zalloc(sizeof(*ss)); 130 if (ss == NULL) { 131 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 132 return NULL; 133 } 134 135 ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */ 136 ss->references = 1; 137 ss->timeout = 60 * 5 + 4; /* 5 minute timeout by default */ 138 ss->time = time(NULL); 139 ssl_session_calculate_timeout(ss); 140 ss->lock = CRYPTO_THREAD_lock_new(); 141 if (ss->lock == NULL) { 142 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 143 OPENSSL_free(ss); 144 return NULL; 145 } 146 147 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data)) { 148 CRYPTO_THREAD_lock_free(ss->lock); 149 OPENSSL_free(ss); 150 return NULL; 151 } 152 return ss; 153 } 154 155 SSL_SESSION *SSL_SESSION_dup(const SSL_SESSION *src) 156 { 157 return ssl_session_dup(src, 1); 158 } 159 160 /* 161 * Create a new SSL_SESSION and duplicate the contents of |src| into it. If 162 * ticket == 0 then no ticket information is duplicated, otherwise it is. 163 */ 164 SSL_SESSION *ssl_session_dup(const SSL_SESSION *src, int ticket) 165 { 166 SSL_SESSION *dest; 167 168 dest = OPENSSL_malloc(sizeof(*dest)); 169 if (dest == NULL) { 170 goto err; 171 } 172 memcpy(dest, src, sizeof(*dest)); 173 174 /* 175 * Set the various pointers to NULL so that we can call SSL_SESSION_free in 176 * the case of an error whilst halfway through constructing dest 177 */ 178 #ifndef OPENSSL_NO_PSK 179 dest->psk_identity_hint = NULL; 180 dest->psk_identity = NULL; 181 #endif 182 dest->ext.hostname = NULL; 183 dest->ext.tick = NULL; 184 dest->ext.alpn_selected = NULL; 185 #ifndef OPENSSL_NO_SRP 186 dest->srp_username = NULL; 187 #endif 188 dest->peer_chain = NULL; 189 dest->peer = NULL; 190 dest->ticket_appdata = NULL; 191 memset(&dest->ex_data, 0, sizeof(dest->ex_data)); 192 193 /* As the copy is not in the cache, we remove the associated pointers */ 194 dest->prev = NULL; 195 dest->next = NULL; 196 dest->owner = NULL; 197 198 dest->references = 1; 199 200 dest->lock = CRYPTO_THREAD_lock_new(); 201 if (dest->lock == NULL) 202 goto err; 203 204 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, dest, &dest->ex_data)) 205 goto err; 206 207 if (src->peer != NULL) { 208 if (!X509_up_ref(src->peer)) 209 goto err; 210 dest->peer = src->peer; 211 } 212 213 if (src->peer_chain != NULL) { 214 dest->peer_chain = X509_chain_up_ref(src->peer_chain); 215 if (dest->peer_chain == NULL) 216 goto err; 217 } 218 #ifndef OPENSSL_NO_PSK 219 if (src->psk_identity_hint) { 220 dest->psk_identity_hint = OPENSSL_strdup(src->psk_identity_hint); 221 if (dest->psk_identity_hint == NULL) { 222 goto err; 223 } 224 } 225 if (src->psk_identity) { 226 dest->psk_identity = OPENSSL_strdup(src->psk_identity); 227 if (dest->psk_identity == NULL) { 228 goto err; 229 } 230 } 231 #endif 232 233 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, 234 &dest->ex_data, &src->ex_data)) { 235 goto err; 236 } 237 238 if (src->ext.hostname) { 239 dest->ext.hostname = OPENSSL_strdup(src->ext.hostname); 240 if (dest->ext.hostname == NULL) { 241 goto err; 242 } 243 } 244 245 if (ticket != 0 && src->ext.tick != NULL) { 246 dest->ext.tick = 247 OPENSSL_memdup(src->ext.tick, src->ext.ticklen); 248 if (dest->ext.tick == NULL) 249 goto err; 250 } else { 251 dest->ext.tick_lifetime_hint = 0; 252 dest->ext.ticklen = 0; 253 } 254 255 if (src->ext.alpn_selected != NULL) { 256 dest->ext.alpn_selected = OPENSSL_memdup(src->ext.alpn_selected, 257 src->ext.alpn_selected_len); 258 if (dest->ext.alpn_selected == NULL) 259 goto err; 260 } 261 262 #ifndef OPENSSL_NO_SRP 263 if (src->srp_username) { 264 dest->srp_username = OPENSSL_strdup(src->srp_username); 265 if (dest->srp_username == NULL) { 266 goto err; 267 } 268 } 269 #endif 270 271 if (src->ticket_appdata != NULL) { 272 dest->ticket_appdata = 273 OPENSSL_memdup(src->ticket_appdata, src->ticket_appdata_len); 274 if (dest->ticket_appdata == NULL) 275 goto err; 276 } 277 278 return dest; 279 err: 280 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 281 SSL_SESSION_free(dest); 282 return NULL; 283 } 284 285 const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *s, unsigned int *len) 286 { 287 if (len) 288 *len = (unsigned int)s->session_id_length; 289 return s->session_id; 290 } 291 const unsigned char *SSL_SESSION_get0_id_context(const SSL_SESSION *s, 292 unsigned int *len) 293 { 294 if (len != NULL) 295 *len = (unsigned int)s->sid_ctx_length; 296 return s->sid_ctx; 297 } 298 299 unsigned int SSL_SESSION_get_compress_id(const SSL_SESSION *s) 300 { 301 return s->compress_meth; 302 } 303 304 /* 305 * SSLv3/TLSv1 has 32 bytes (256 bits) of session ID space. As such, filling 306 * the ID with random junk repeatedly until we have no conflict is going to 307 * complete in one iteration pretty much "most" of the time (btw: 308 * understatement). So, if it takes us 10 iterations and we still can't avoid 309 * a conflict - well that's a reasonable point to call it quits. Either the 310 * RAND code is broken or someone is trying to open roughly very close to 311 * 2^256 SSL sessions to our server. How you might store that many sessions 312 * is perhaps a more interesting question ... 313 */ 314 315 #define MAX_SESS_ID_ATTEMPTS 10 316 static int def_generate_session_id(SSL *ssl, unsigned char *id, 317 unsigned int *id_len) 318 { 319 unsigned int retry = 0; 320 do 321 if (RAND_bytes_ex(ssl->ctx->libctx, id, *id_len, 0) <= 0) 322 return 0; 323 while (SSL_has_matching_session_id(ssl, id, *id_len) && 324 (++retry < MAX_SESS_ID_ATTEMPTS)) ; 325 if (retry < MAX_SESS_ID_ATTEMPTS) 326 return 1; 327 /* else - woops a session_id match */ 328 /* 329 * XXX We should also check the external cache -- but the probability of 330 * a collision is negligible, and we could not prevent the concurrent 331 * creation of sessions with identical IDs since we currently don't have 332 * means to atomically check whether a session ID already exists and make 333 * a reservation for it if it does not (this problem applies to the 334 * internal cache as well). 335 */ 336 return 0; 337 } 338 339 int ssl_generate_session_id(SSL *s, SSL_SESSION *ss) 340 { 341 unsigned int tmp; 342 GEN_SESSION_CB cb = def_generate_session_id; 343 344 switch (s->version) { 345 case SSL3_VERSION: 346 case TLS1_VERSION: 347 case TLS1_1_VERSION: 348 case TLS1_2_VERSION: 349 case TLS1_3_VERSION: 350 case DTLS1_BAD_VER: 351 case DTLS1_VERSION: 352 case DTLS1_2_VERSION: 353 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; 354 break; 355 default: 356 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_UNSUPPORTED_SSL_VERSION); 357 return 0; 358 } 359 360 /*- 361 * If RFC5077 ticket, use empty session ID (as server). 362 * Note that: 363 * (a) ssl_get_prev_session() does lookahead into the 364 * ClientHello extensions to find the session ticket. 365 * When ssl_get_prev_session() fails, statem_srvr.c calls 366 * ssl_get_new_session() in tls_process_client_hello(). 367 * At that point, it has not yet parsed the extensions, 368 * however, because of the lookahead, it already knows 369 * whether a ticket is expected or not. 370 * 371 * (b) statem_clnt.c calls ssl_get_new_session() before parsing 372 * ServerHello extensions, and before recording the session 373 * ID received from the server, so this block is a noop. 374 */ 375 if (s->ext.ticket_expected) { 376 ss->session_id_length = 0; 377 return 1; 378 } 379 380 /* Choose which callback will set the session ID */ 381 if (!CRYPTO_THREAD_read_lock(s->lock)) 382 return 0; 383 if (!CRYPTO_THREAD_read_lock(s->session_ctx->lock)) { 384 CRYPTO_THREAD_unlock(s->lock); 385 SSLfatal(s, SSL_AD_INTERNAL_ERROR, 386 SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED); 387 return 0; 388 } 389 if (s->generate_session_id) 390 cb = s->generate_session_id; 391 else if (s->session_ctx->generate_session_id) 392 cb = s->session_ctx->generate_session_id; 393 CRYPTO_THREAD_unlock(s->session_ctx->lock); 394 CRYPTO_THREAD_unlock(s->lock); 395 /* Choose a session ID */ 396 memset(ss->session_id, 0, ss->session_id_length); 397 tmp = (int)ss->session_id_length; 398 if (!cb(s, ss->session_id, &tmp)) { 399 /* The callback failed */ 400 SSLfatal(s, SSL_AD_INTERNAL_ERROR, 401 SSL_R_SSL_SESSION_ID_CALLBACK_FAILED); 402 return 0; 403 } 404 /* 405 * Don't allow the callback to set the session length to zero. nor 406 * set it higher than it was. 407 */ 408 if (tmp == 0 || tmp > ss->session_id_length) { 409 /* The callback set an illegal length */ 410 SSLfatal(s, SSL_AD_INTERNAL_ERROR, 411 SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH); 412 return 0; 413 } 414 ss->session_id_length = tmp; 415 /* Finally, check for a conflict */ 416 if (SSL_has_matching_session_id(s, ss->session_id, 417 (unsigned int)ss->session_id_length)) { 418 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_SSL_SESSION_ID_CONFLICT); 419 return 0; 420 } 421 422 return 1; 423 } 424 425 int ssl_get_new_session(SSL *s, int session) 426 { 427 /* This gets used by clients and servers. */ 428 429 SSL_SESSION *ss = NULL; 430 431 if ((ss = SSL_SESSION_new()) == NULL) { 432 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); 433 return 0; 434 } 435 436 /* If the context has a default timeout, use it */ 437 if (s->session_ctx->session_timeout == 0) 438 ss->timeout = SSL_get_default_timeout(s); 439 else 440 ss->timeout = s->session_ctx->session_timeout; 441 ssl_session_calculate_timeout(ss); 442 443 SSL_SESSION_free(s->session); 444 s->session = NULL; 445 446 if (session) { 447 if (SSL_IS_TLS13(s)) { 448 /* 449 * We generate the session id while constructing the 450 * NewSessionTicket in TLSv1.3. 451 */ 452 ss->session_id_length = 0; 453 } else if (!ssl_generate_session_id(s, ss)) { 454 /* SSLfatal() already called */ 455 SSL_SESSION_free(ss); 456 return 0; 457 } 458 459 } else { 460 ss->session_id_length = 0; 461 } 462 463 if (s->sid_ctx_length > sizeof(ss->sid_ctx)) { 464 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); 465 SSL_SESSION_free(ss); 466 return 0; 467 } 468 memcpy(ss->sid_ctx, s->sid_ctx, s->sid_ctx_length); 469 ss->sid_ctx_length = s->sid_ctx_length; 470 s->session = ss; 471 ss->ssl_version = s->version; 472 ss->verify_result = X509_V_OK; 473 474 /* If client supports extended master secret set it in session */ 475 if (s->s3.flags & TLS1_FLAGS_RECEIVED_EXTMS) 476 ss->flags |= SSL_SESS_FLAG_EXTMS; 477 478 return 1; 479 } 480 481 SSL_SESSION *lookup_sess_in_cache(SSL *s, const unsigned char *sess_id, 482 size_t sess_id_len) 483 { 484 SSL_SESSION *ret = NULL; 485 486 if ((s->session_ctx->session_cache_mode 487 & SSL_SESS_CACHE_NO_INTERNAL_LOOKUP) == 0) { 488 SSL_SESSION data; 489 490 data.ssl_version = s->version; 491 if (!ossl_assert(sess_id_len <= SSL_MAX_SSL_SESSION_ID_LENGTH)) 492 return NULL; 493 494 memcpy(data.session_id, sess_id, sess_id_len); 495 data.session_id_length = sess_id_len; 496 497 if (!CRYPTO_THREAD_read_lock(s->session_ctx->lock)) 498 return NULL; 499 ret = lh_SSL_SESSION_retrieve(s->session_ctx->sessions, &data); 500 if (ret != NULL) { 501 /* don't allow other threads to steal it: */ 502 SSL_SESSION_up_ref(ret); 503 } 504 CRYPTO_THREAD_unlock(s->session_ctx->lock); 505 if (ret == NULL) 506 ssl_tsan_counter(s->session_ctx, &s->session_ctx->stats.sess_miss); 507 } 508 509 if (ret == NULL && s->session_ctx->get_session_cb != NULL) { 510 int copy = 1; 511 512 ret = s->session_ctx->get_session_cb(s, sess_id, sess_id_len, ©); 513 514 if (ret != NULL) { 515 ssl_tsan_counter(s->session_ctx, 516 &s->session_ctx->stats.sess_cb_hit); 517 518 /* 519 * Increment reference count now if the session callback asks us 520 * to do so (note that if the session structures returned by the 521 * callback are shared between threads, it must handle the 522 * reference count itself [i.e. copy == 0], or things won't be 523 * thread-safe). 524 */ 525 if (copy) 526 SSL_SESSION_up_ref(ret); 527 528 /* 529 * Add the externally cached session to the internal cache as 530 * well if and only if we are supposed to. 531 */ 532 if ((s->session_ctx->session_cache_mode & 533 SSL_SESS_CACHE_NO_INTERNAL_STORE) == 0) { 534 /* 535 * Either return value of SSL_CTX_add_session should not 536 * interrupt the session resumption process. The return 537 * value is intentionally ignored. 538 */ 539 (void)SSL_CTX_add_session(s->session_ctx, ret); 540 } 541 } 542 } 543 544 return ret; 545 } 546 547 /*- 548 * ssl_get_prev attempts to find an SSL_SESSION to be used to resume this 549 * connection. It is only called by servers. 550 * 551 * hello: The parsed ClientHello data 552 * 553 * Returns: 554 * -1: fatal error 555 * 0: no session found 556 * 1: 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->ext.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, CLIENTHELLO_MSG *hello) 565 { 566 /* This is used only by servers. */ 567 568 SSL_SESSION *ret = NULL; 569 int fatal = 0; 570 int try_session_cache = 0; 571 SSL_TICKET_STATUS r; 572 573 if (SSL_IS_TLS13(s)) { 574 /* 575 * By default we will send a new ticket. This can be overridden in the 576 * ticket processing. 577 */ 578 s->ext.ticket_expected = 1; 579 if (!tls_parse_extension(s, TLSEXT_IDX_psk_kex_modes, 580 SSL_EXT_CLIENT_HELLO, hello->pre_proc_exts, 581 NULL, 0) 582 || !tls_parse_extension(s, TLSEXT_IDX_psk, SSL_EXT_CLIENT_HELLO, 583 hello->pre_proc_exts, NULL, 0)) 584 return -1; 585 586 ret = s->session; 587 } else { 588 /* sets s->ext.ticket_expected */ 589 r = tls_get_ticket_from_client(s, hello, &ret); 590 switch (r) { 591 case SSL_TICKET_FATAL_ERR_MALLOC: 592 case SSL_TICKET_FATAL_ERR_OTHER: 593 fatal = 1; 594 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); 595 goto err; 596 case SSL_TICKET_NONE: 597 case SSL_TICKET_EMPTY: 598 if (hello->session_id_len > 0) { 599 try_session_cache = 1; 600 ret = lookup_sess_in_cache(s, hello->session_id, 601 hello->session_id_len); 602 } 603 break; 604 case SSL_TICKET_NO_DECRYPT: 605 case SSL_TICKET_SUCCESS: 606 case SSL_TICKET_SUCCESS_RENEW: 607 break; 608 } 609 } 610 611 if (ret == NULL) 612 goto err; 613 614 /* Now ret is non-NULL and we own one of its reference counts. */ 615 616 /* Check TLS version consistency */ 617 if (ret->ssl_version != s->version) 618 goto err; 619 620 if (ret->sid_ctx_length != s->sid_ctx_length 621 || memcmp(ret->sid_ctx, s->sid_ctx, ret->sid_ctx_length)) { 622 /* 623 * We have the session requested by the client, but we don't want to 624 * use it in this context. 625 */ 626 goto err; /* treat like cache miss */ 627 } 628 629 if ((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0) { 630 /* 631 * We can't be sure if this session is being used out of context, 632 * which is especially important for SSL_VERIFY_PEER. The application 633 * should have used SSL[_CTX]_set_session_id_context. For this error 634 * case, we generate an error instead of treating the event like a 635 * cache miss (otherwise it would be easy for applications to 636 * effectively disable the session cache by accident without anyone 637 * noticing). 638 */ 639 640 SSLfatal(s, SSL_AD_INTERNAL_ERROR, 641 SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED); 642 fatal = 1; 643 goto err; 644 } 645 646 if (sess_timedout(time(NULL), ret)) { 647 ssl_tsan_counter(s->session_ctx, &s->session_ctx->stats.sess_timeout); 648 if (try_session_cache) { 649 /* session was from the cache, so remove it */ 650 SSL_CTX_remove_session(s->session_ctx, ret); 651 } 652 goto err; 653 } 654 655 /* Check extended master secret extension consistency */ 656 if (ret->flags & SSL_SESS_FLAG_EXTMS) { 657 /* If old session includes extms, but new does not: abort handshake */ 658 if (!(s->s3.flags & TLS1_FLAGS_RECEIVED_EXTMS)) { 659 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_INCONSISTENT_EXTMS); 660 fatal = 1; 661 goto err; 662 } 663 } else if (s->s3.flags & TLS1_FLAGS_RECEIVED_EXTMS) { 664 /* If new session includes extms, but old does not: do not resume */ 665 goto err; 666 } 667 668 if (!SSL_IS_TLS13(s)) { 669 /* We already did this for TLS1.3 */ 670 SSL_SESSION_free(s->session); 671 s->session = ret; 672 } 673 674 ssl_tsan_counter(s->session_ctx, &s->session_ctx->stats.sess_hit); 675 s->verify_result = s->session->verify_result; 676 return 1; 677 678 err: 679 if (ret != NULL) { 680 SSL_SESSION_free(ret); 681 /* In TLSv1.3 s->session was already set to ret, so we NULL it out */ 682 if (SSL_IS_TLS13(s)) 683 s->session = NULL; 684 685 if (!try_session_cache) { 686 /* 687 * The session was from a ticket, so we should issue a ticket for 688 * the new session 689 */ 690 s->ext.ticket_expected = 1; 691 } 692 } 693 if (fatal) 694 return -1; 695 696 return 0; 697 } 698 699 int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c) 700 { 701 int ret = 0; 702 SSL_SESSION *s; 703 704 /* 705 * add just 1 reference count for the SSL_CTX's session cache even though 706 * it has two ways of access: each session is in a doubly linked list and 707 * an lhash 708 */ 709 SSL_SESSION_up_ref(c); 710 /* 711 * if session c is in already in cache, we take back the increment later 712 */ 713 714 if (!CRYPTO_THREAD_write_lock(ctx->lock)) { 715 SSL_SESSION_free(c); 716 return 0; 717 } 718 s = lh_SSL_SESSION_insert(ctx->sessions, c); 719 720 /* 721 * s != NULL iff we already had a session with the given PID. In this 722 * case, s == c should hold (then we did not really modify 723 * ctx->sessions), or we're in trouble. 724 */ 725 if (s != NULL && s != c) { 726 /* We *are* in trouble ... */ 727 SSL_SESSION_list_remove(ctx, s); 728 SSL_SESSION_free(s); 729 /* 730 * ... so pretend the other session did not exist in cache (we cannot 731 * handle two SSL_SESSION structures with identical session ID in the 732 * same cache, which could happen e.g. when two threads concurrently 733 * obtain the same session from an external cache) 734 */ 735 s = NULL; 736 } else if (s == NULL && 737 lh_SSL_SESSION_retrieve(ctx->sessions, c) == NULL) { 738 /* s == NULL can also mean OOM error in lh_SSL_SESSION_insert ... */ 739 740 /* 741 * ... so take back the extra reference and also don't add 742 * the session to the SSL_SESSION_list at this time 743 */ 744 s = c; 745 } 746 747 /* Adjust last used time, and add back into the cache at the appropriate spot */ 748 if (ctx->session_cache_mode & SSL_SESS_CACHE_UPDATE_TIME) { 749 c->time = time(NULL); 750 ssl_session_calculate_timeout(c); 751 } 752 753 if (s == NULL) { 754 /* 755 * new cache entry -- remove old ones if cache has become too large 756 * delete cache entry *before* add, so we don't remove the one we're adding! 757 */ 758 759 ret = 1; 760 761 if (SSL_CTX_sess_get_cache_size(ctx) > 0) { 762 while (SSL_CTX_sess_number(ctx) >= SSL_CTX_sess_get_cache_size(ctx)) { 763 if (!remove_session_lock(ctx, ctx->session_cache_tail, 0)) 764 break; 765 else 766 ssl_tsan_counter(ctx, &ctx->stats.sess_cache_full); 767 } 768 } 769 } 770 771 SSL_SESSION_list_add(ctx, c); 772 773 if (s != NULL) { 774 /* 775 * existing cache entry -- decrement previously incremented reference 776 * count because it already takes into account the cache 777 */ 778 779 SSL_SESSION_free(s); /* s == c */ 780 ret = 0; 781 } 782 CRYPTO_THREAD_unlock(ctx->lock); 783 return ret; 784 } 785 786 int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c) 787 { 788 return remove_session_lock(ctx, c, 1); 789 } 790 791 static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck) 792 { 793 SSL_SESSION *r; 794 int ret = 0; 795 796 if ((c != NULL) && (c->session_id_length != 0)) { 797 if (lck) { 798 if (!CRYPTO_THREAD_write_lock(ctx->lock)) 799 return 0; 800 } 801 if ((r = lh_SSL_SESSION_retrieve(ctx->sessions, c)) != NULL) { 802 ret = 1; 803 r = lh_SSL_SESSION_delete(ctx->sessions, r); 804 SSL_SESSION_list_remove(ctx, r); 805 } 806 c->not_resumable = 1; 807 808 if (lck) 809 CRYPTO_THREAD_unlock(ctx->lock); 810 811 if (ctx->remove_session_cb != NULL) 812 ctx->remove_session_cb(ctx, c); 813 814 if (ret) 815 SSL_SESSION_free(r); 816 } 817 return ret; 818 } 819 820 void SSL_SESSION_free(SSL_SESSION *ss) 821 { 822 int i; 823 824 if (ss == NULL) 825 return; 826 CRYPTO_DOWN_REF(&ss->references, &i, ss->lock); 827 REF_PRINT_COUNT("SSL_SESSION", ss); 828 if (i > 0) 829 return; 830 REF_ASSERT_ISNT(i < 0); 831 832 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data); 833 834 OPENSSL_cleanse(ss->master_key, sizeof(ss->master_key)); 835 OPENSSL_cleanse(ss->session_id, sizeof(ss->session_id)); 836 X509_free(ss->peer); 837 sk_X509_pop_free(ss->peer_chain, X509_free); 838 OPENSSL_free(ss->ext.hostname); 839 OPENSSL_free(ss->ext.tick); 840 #ifndef OPENSSL_NO_PSK 841 OPENSSL_free(ss->psk_identity_hint); 842 OPENSSL_free(ss->psk_identity); 843 #endif 844 #ifndef OPENSSL_NO_SRP 845 OPENSSL_free(ss->srp_username); 846 #endif 847 OPENSSL_free(ss->ext.alpn_selected); 848 OPENSSL_free(ss->ticket_appdata); 849 CRYPTO_THREAD_lock_free(ss->lock); 850 OPENSSL_clear_free(ss, sizeof(*ss)); 851 } 852 853 int SSL_SESSION_up_ref(SSL_SESSION *ss) 854 { 855 int i; 856 857 if (CRYPTO_UP_REF(&ss->references, &i, ss->lock) <= 0) 858 return 0; 859 860 REF_PRINT_COUNT("SSL_SESSION", ss); 861 REF_ASSERT_ISNT(i < 2); 862 return ((i > 1) ? 1 : 0); 863 } 864 865 int SSL_set_session(SSL *s, SSL_SESSION *session) 866 { 867 ssl_clear_bad_session(s); 868 if (s->ctx->method != s->method) { 869 if (!SSL_set_ssl_method(s, s->ctx->method)) 870 return 0; 871 } 872 873 if (session != NULL) { 874 SSL_SESSION_up_ref(session); 875 s->verify_result = session->verify_result; 876 } 877 SSL_SESSION_free(s->session); 878 s->session = session; 879 880 return 1; 881 } 882 883 int SSL_SESSION_set1_id(SSL_SESSION *s, const unsigned char *sid, 884 unsigned int sid_len) 885 { 886 if (sid_len > SSL_MAX_SSL_SESSION_ID_LENGTH) { 887 ERR_raise(ERR_LIB_SSL, SSL_R_SSL_SESSION_ID_TOO_LONG); 888 return 0; 889 } 890 s->session_id_length = sid_len; 891 if (sid != s->session_id) 892 memcpy(s->session_id, sid, sid_len); 893 return 1; 894 } 895 896 long SSL_SESSION_set_timeout(SSL_SESSION *s, long t) 897 { 898 time_t new_timeout = (time_t)t; 899 900 if (s == NULL || t < 0) 901 return 0; 902 if (s->owner != NULL) { 903 if (!CRYPTO_THREAD_write_lock(s->owner->lock)) 904 return 0; 905 s->timeout = new_timeout; 906 ssl_session_calculate_timeout(s); 907 SSL_SESSION_list_add(s->owner, s); 908 CRYPTO_THREAD_unlock(s->owner->lock); 909 } else { 910 s->timeout = new_timeout; 911 ssl_session_calculate_timeout(s); 912 } 913 return 1; 914 } 915 916 long SSL_SESSION_get_timeout(const SSL_SESSION *s) 917 { 918 if (s == NULL) 919 return 0; 920 return (long)s->timeout; 921 } 922 923 long SSL_SESSION_get_time(const SSL_SESSION *s) 924 { 925 if (s == NULL) 926 return 0; 927 return (long)s->time; 928 } 929 930 long SSL_SESSION_set_time(SSL_SESSION *s, long t) 931 { 932 time_t new_time = (time_t)t; 933 934 if (s == NULL) 935 return 0; 936 if (s->owner != NULL) { 937 if (!CRYPTO_THREAD_write_lock(s->owner->lock)) 938 return 0; 939 s->time = new_time; 940 ssl_session_calculate_timeout(s); 941 SSL_SESSION_list_add(s->owner, s); 942 CRYPTO_THREAD_unlock(s->owner->lock); 943 } else { 944 s->time = new_time; 945 ssl_session_calculate_timeout(s); 946 } 947 return t; 948 } 949 950 int SSL_SESSION_get_protocol_version(const SSL_SESSION *s) 951 { 952 return s->ssl_version; 953 } 954 955 int SSL_SESSION_set_protocol_version(SSL_SESSION *s, int version) 956 { 957 s->ssl_version = version; 958 return 1; 959 } 960 961 const SSL_CIPHER *SSL_SESSION_get0_cipher(const SSL_SESSION *s) 962 { 963 return s->cipher; 964 } 965 966 int SSL_SESSION_set_cipher(SSL_SESSION *s, const SSL_CIPHER *cipher) 967 { 968 s->cipher = cipher; 969 return 1; 970 } 971 972 const char *SSL_SESSION_get0_hostname(const SSL_SESSION *s) 973 { 974 return s->ext.hostname; 975 } 976 977 int SSL_SESSION_set1_hostname(SSL_SESSION *s, const char *hostname) 978 { 979 OPENSSL_free(s->ext.hostname); 980 if (hostname == NULL) { 981 s->ext.hostname = NULL; 982 return 1; 983 } 984 s->ext.hostname = OPENSSL_strdup(hostname); 985 986 return s->ext.hostname != NULL; 987 } 988 989 int SSL_SESSION_has_ticket(const SSL_SESSION *s) 990 { 991 return (s->ext.ticklen > 0) ? 1 : 0; 992 } 993 994 unsigned long SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION *s) 995 { 996 return s->ext.tick_lifetime_hint; 997 } 998 999 void SSL_SESSION_get0_ticket(const SSL_SESSION *s, const unsigned char **tick, 1000 size_t *len) 1001 { 1002 *len = s->ext.ticklen; 1003 if (tick != NULL) 1004 *tick = s->ext.tick; 1005 } 1006 1007 uint32_t SSL_SESSION_get_max_early_data(const SSL_SESSION *s) 1008 { 1009 return s->ext.max_early_data; 1010 } 1011 1012 int SSL_SESSION_set_max_early_data(SSL_SESSION *s, uint32_t max_early_data) 1013 { 1014 s->ext.max_early_data = max_early_data; 1015 1016 return 1; 1017 } 1018 1019 void SSL_SESSION_get0_alpn_selected(const SSL_SESSION *s, 1020 const unsigned char **alpn, 1021 size_t *len) 1022 { 1023 *alpn = s->ext.alpn_selected; 1024 *len = s->ext.alpn_selected_len; 1025 } 1026 1027 int SSL_SESSION_set1_alpn_selected(SSL_SESSION *s, const unsigned char *alpn, 1028 size_t len) 1029 { 1030 OPENSSL_free(s->ext.alpn_selected); 1031 if (alpn == NULL || len == 0) { 1032 s->ext.alpn_selected = NULL; 1033 s->ext.alpn_selected_len = 0; 1034 return 1; 1035 } 1036 s->ext.alpn_selected = OPENSSL_memdup(alpn, len); 1037 if (s->ext.alpn_selected == NULL) { 1038 s->ext.alpn_selected_len = 0; 1039 return 0; 1040 } 1041 s->ext.alpn_selected_len = len; 1042 1043 return 1; 1044 } 1045 1046 X509 *SSL_SESSION_get0_peer(SSL_SESSION *s) 1047 { 1048 return s->peer; 1049 } 1050 1051 int SSL_SESSION_set1_id_context(SSL_SESSION *s, const unsigned char *sid_ctx, 1052 unsigned int sid_ctx_len) 1053 { 1054 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { 1055 ERR_raise(ERR_LIB_SSL, SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); 1056 return 0; 1057 } 1058 s->sid_ctx_length = sid_ctx_len; 1059 if (sid_ctx != s->sid_ctx) 1060 memcpy(s->sid_ctx, sid_ctx, sid_ctx_len); 1061 1062 return 1; 1063 } 1064 1065 int SSL_SESSION_is_resumable(const SSL_SESSION *s) 1066 { 1067 /* 1068 * In the case of EAP-FAST, we can have a pre-shared "ticket" without a 1069 * session ID. 1070 */ 1071 return !s->not_resumable 1072 && (s->session_id_length > 0 || s->ext.ticklen > 0); 1073 } 1074 1075 long SSL_CTX_set_timeout(SSL_CTX *s, long t) 1076 { 1077 long l; 1078 if (s == NULL) 1079 return 0; 1080 l = s->session_timeout; 1081 s->session_timeout = t; 1082 return l; 1083 } 1084 1085 long SSL_CTX_get_timeout(const SSL_CTX *s) 1086 { 1087 if (s == NULL) 1088 return 0; 1089 return s->session_timeout; 1090 } 1091 1092 int SSL_set_session_secret_cb(SSL *s, 1093 tls_session_secret_cb_fn tls_session_secret_cb, 1094 void *arg) 1095 { 1096 if (s == NULL) 1097 return 0; 1098 s->ext.session_secret_cb = tls_session_secret_cb; 1099 s->ext.session_secret_cb_arg = arg; 1100 return 1; 1101 } 1102 1103 int SSL_set_session_ticket_ext_cb(SSL *s, tls_session_ticket_ext_cb_fn cb, 1104 void *arg) 1105 { 1106 if (s == NULL) 1107 return 0; 1108 s->ext.session_ticket_cb = cb; 1109 s->ext.session_ticket_cb_arg = arg; 1110 return 1; 1111 } 1112 1113 int SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len) 1114 { 1115 if (s->version >= TLS1_VERSION) { 1116 OPENSSL_free(s->ext.session_ticket); 1117 s->ext.session_ticket = NULL; 1118 s->ext.session_ticket = 1119 OPENSSL_malloc(sizeof(TLS_SESSION_TICKET_EXT) + ext_len); 1120 if (s->ext.session_ticket == NULL) { 1121 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 1122 return 0; 1123 } 1124 1125 if (ext_data != NULL) { 1126 s->ext.session_ticket->length = ext_len; 1127 s->ext.session_ticket->data = s->ext.session_ticket + 1; 1128 memcpy(s->ext.session_ticket->data, ext_data, ext_len); 1129 } else { 1130 s->ext.session_ticket->length = 0; 1131 s->ext.session_ticket->data = NULL; 1132 } 1133 1134 return 1; 1135 } 1136 1137 return 0; 1138 } 1139 1140 void SSL_CTX_flush_sessions(SSL_CTX *s, long t) 1141 { 1142 STACK_OF(SSL_SESSION) *sk; 1143 SSL_SESSION *current; 1144 unsigned long i; 1145 1146 if (!CRYPTO_THREAD_write_lock(s->lock)) 1147 return; 1148 1149 sk = sk_SSL_SESSION_new_null(); 1150 i = lh_SSL_SESSION_get_down_load(s->sessions); 1151 lh_SSL_SESSION_set_down_load(s->sessions, 0); 1152 1153 /* 1154 * Iterate over the list from the back (oldest), and stop 1155 * when a session can no longer be removed. 1156 * Add the session to a temporary list to be freed outside 1157 * the SSL_CTX lock. 1158 * But still do the remove_session_cb() within the lock. 1159 */ 1160 while (s->session_cache_tail != NULL) { 1161 current = s->session_cache_tail; 1162 if (t == 0 || sess_timedout((time_t)t, current)) { 1163 lh_SSL_SESSION_delete(s->sessions, current); 1164 SSL_SESSION_list_remove(s, current); 1165 current->not_resumable = 1; 1166 if (s->remove_session_cb != NULL) 1167 s->remove_session_cb(s, current); 1168 /* 1169 * Throw the session on a stack, it's entirely plausible 1170 * that while freeing outside the critical section, the 1171 * session could be re-added, so avoid using the next/prev 1172 * pointers. If the stack failed to create, or the session 1173 * couldn't be put on the stack, just free it here 1174 */ 1175 if (sk == NULL || !sk_SSL_SESSION_push(sk, current)) 1176 SSL_SESSION_free(current); 1177 } else { 1178 break; 1179 } 1180 } 1181 1182 lh_SSL_SESSION_set_down_load(s->sessions, i); 1183 CRYPTO_THREAD_unlock(s->lock); 1184 1185 sk_SSL_SESSION_pop_free(sk, SSL_SESSION_free); 1186 } 1187 1188 int ssl_clear_bad_session(SSL *s) 1189 { 1190 if ((s->session != NULL) && 1191 !(s->shutdown & SSL_SENT_SHUTDOWN) && 1192 !(SSL_in_init(s) || SSL_in_before(s))) { 1193 SSL_CTX_remove_session(s->session_ctx, s->session); 1194 return 1; 1195 } else 1196 return 0; 1197 } 1198 1199 /* locked by SSL_CTX in the calling function */ 1200 static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s) 1201 { 1202 if ((s->next == NULL) || (s->prev == NULL)) 1203 return; 1204 1205 if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail)) { 1206 /* last element in list */ 1207 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { 1208 /* only one element in list */ 1209 ctx->session_cache_head = NULL; 1210 ctx->session_cache_tail = NULL; 1211 } else { 1212 ctx->session_cache_tail = s->prev; 1213 s->prev->next = (SSL_SESSION *)&(ctx->session_cache_tail); 1214 } 1215 } else { 1216 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { 1217 /* first element in list */ 1218 ctx->session_cache_head = s->next; 1219 s->next->prev = (SSL_SESSION *)&(ctx->session_cache_head); 1220 } else { 1221 /* middle of list */ 1222 s->next->prev = s->prev; 1223 s->prev->next = s->next; 1224 } 1225 } 1226 s->prev = s->next = NULL; 1227 s->owner = NULL; 1228 } 1229 1230 static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s) 1231 { 1232 SSL_SESSION *next; 1233 1234 if ((s->next != NULL) && (s->prev != NULL)) 1235 SSL_SESSION_list_remove(ctx, s); 1236 1237 if (ctx->session_cache_head == NULL) { 1238 ctx->session_cache_head = s; 1239 ctx->session_cache_tail = s; 1240 s->prev = (SSL_SESSION *)&(ctx->session_cache_head); 1241 s->next = (SSL_SESSION *)&(ctx->session_cache_tail); 1242 } else { 1243 if (timeoutcmp(s, ctx->session_cache_head) >= 0) { 1244 /* 1245 * if we timeout after (or the same time as) the first 1246 * session, put us first - usual case 1247 */ 1248 s->next = ctx->session_cache_head; 1249 s->next->prev = s; 1250 s->prev = (SSL_SESSION *)&(ctx->session_cache_head); 1251 ctx->session_cache_head = s; 1252 } else if (timeoutcmp(s, ctx->session_cache_tail) < 0) { 1253 /* if we timeout before the last session, put us last */ 1254 s->prev = ctx->session_cache_tail; 1255 s->prev->next = s; 1256 s->next = (SSL_SESSION *)&(ctx->session_cache_tail); 1257 ctx->session_cache_tail = s; 1258 } else { 1259 /* 1260 * we timeout somewhere in-between - if there is only 1261 * one session in the cache it will be caught above 1262 */ 1263 next = ctx->session_cache_head->next; 1264 while (next != (SSL_SESSION*)&(ctx->session_cache_tail)) { 1265 if (timeoutcmp(s, next) >= 0) { 1266 s->next = next; 1267 s->prev = next->prev; 1268 next->prev->next = s; 1269 next->prev = s; 1270 break; 1271 } 1272 next = next->next; 1273 } 1274 } 1275 } 1276 s->owner = ctx; 1277 } 1278 1279 void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx, 1280 int (*cb) (struct ssl_st *ssl, SSL_SESSION *sess)) 1281 { 1282 ctx->new_session_cb = cb; 1283 } 1284 1285 int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx)) (SSL *ssl, SSL_SESSION *sess) { 1286 return ctx->new_session_cb; 1287 } 1288 1289 void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx, 1290 void (*cb) (SSL_CTX *ctx, SSL_SESSION *sess)) 1291 { 1292 ctx->remove_session_cb = cb; 1293 } 1294 1295 void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx)) (SSL_CTX *ctx, 1296 SSL_SESSION *sess) { 1297 return ctx->remove_session_cb; 1298 } 1299 1300 void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx, 1301 SSL_SESSION *(*cb) (struct ssl_st *ssl, 1302 const unsigned char *data, 1303 int len, int *copy)) 1304 { 1305 ctx->get_session_cb = cb; 1306 } 1307 1308 SSL_SESSION *(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx)) (SSL *ssl, 1309 const unsigned char 1310 *data, int len, 1311 int *copy) { 1312 return ctx->get_session_cb; 1313 } 1314 1315 void SSL_CTX_set_info_callback(SSL_CTX *ctx, 1316 void (*cb) (const SSL *ssl, int type, int val)) 1317 { 1318 ctx->info_callback = cb; 1319 } 1320 1321 void (*SSL_CTX_get_info_callback(SSL_CTX *ctx)) (const SSL *ssl, int type, 1322 int val) { 1323 return ctx->info_callback; 1324 } 1325 1326 void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx, 1327 int (*cb) (SSL *ssl, X509 **x509, 1328 EVP_PKEY **pkey)) 1329 { 1330 ctx->client_cert_cb = cb; 1331 } 1332 1333 int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx)) (SSL *ssl, X509 **x509, 1334 EVP_PKEY **pkey) { 1335 return ctx->client_cert_cb; 1336 } 1337 1338 void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx, 1339 int (*cb) (SSL *ssl, 1340 unsigned char *cookie, 1341 unsigned int *cookie_len)) 1342 { 1343 ctx->app_gen_cookie_cb = cb; 1344 } 1345 1346 void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx, 1347 int (*cb) (SSL *ssl, 1348 const unsigned char *cookie, 1349 unsigned int cookie_len)) 1350 { 1351 ctx->app_verify_cookie_cb = cb; 1352 } 1353 1354 int SSL_SESSION_set1_ticket_appdata(SSL_SESSION *ss, const void *data, size_t len) 1355 { 1356 OPENSSL_free(ss->ticket_appdata); 1357 ss->ticket_appdata_len = 0; 1358 if (data == NULL || len == 0) { 1359 ss->ticket_appdata = NULL; 1360 return 1; 1361 } 1362 ss->ticket_appdata = OPENSSL_memdup(data, len); 1363 if (ss->ticket_appdata != NULL) { 1364 ss->ticket_appdata_len = len; 1365 return 1; 1366 } 1367 return 0; 1368 } 1369 1370 int SSL_SESSION_get0_ticket_appdata(SSL_SESSION *ss, void **data, size_t *len) 1371 { 1372 *data = ss->ticket_appdata; 1373 *len = ss->ticket_appdata_len; 1374 return 1; 1375 } 1376 1377 void SSL_CTX_set_stateless_cookie_generate_cb( 1378 SSL_CTX *ctx, 1379 int (*cb) (SSL *ssl, 1380 unsigned char *cookie, 1381 size_t *cookie_len)) 1382 { 1383 ctx->gen_stateless_cookie_cb = cb; 1384 } 1385 1386 void SSL_CTX_set_stateless_cookie_verify_cb( 1387 SSL_CTX *ctx, 1388 int (*cb) (SSL *ssl, 1389 const unsigned char *cookie, 1390 size_t cookie_len)) 1391 { 1392 ctx->verify_stateless_cookie_cb = cb; 1393 } 1394 1395 IMPLEMENT_PEM_rw(SSL_SESSION, SSL_SESSION, PEM_STRING_SSL_SESSION, SSL_SESSION) 1396