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 OPENSSL_free(dest); 203 dest = NULL; 204 goto err; 205 } 206 207 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, dest, &dest->ex_data)) 208 goto err; 209 210 if (src->peer != NULL) { 211 if (!X509_up_ref(src->peer)) 212 goto err; 213 dest->peer = src->peer; 214 } 215 216 if (src->peer_chain != NULL) { 217 dest->peer_chain = X509_chain_up_ref(src->peer_chain); 218 if (dest->peer_chain == NULL) 219 goto err; 220 } 221 #ifndef OPENSSL_NO_PSK 222 if (src->psk_identity_hint) { 223 dest->psk_identity_hint = OPENSSL_strdup(src->psk_identity_hint); 224 if (dest->psk_identity_hint == NULL) { 225 goto err; 226 } 227 } 228 if (src->psk_identity) { 229 dest->psk_identity = OPENSSL_strdup(src->psk_identity); 230 if (dest->psk_identity == NULL) { 231 goto err; 232 } 233 } 234 #endif 235 236 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, 237 &dest->ex_data, &src->ex_data)) { 238 goto err; 239 } 240 241 if (src->ext.hostname) { 242 dest->ext.hostname = OPENSSL_strdup(src->ext.hostname); 243 if (dest->ext.hostname == NULL) { 244 goto err; 245 } 246 } 247 248 if (ticket != 0 && src->ext.tick != NULL) { 249 dest->ext.tick = 250 OPENSSL_memdup(src->ext.tick, src->ext.ticklen); 251 if (dest->ext.tick == NULL) 252 goto err; 253 } else { 254 dest->ext.tick_lifetime_hint = 0; 255 dest->ext.ticklen = 0; 256 } 257 258 if (src->ext.alpn_selected != NULL) { 259 dest->ext.alpn_selected = OPENSSL_memdup(src->ext.alpn_selected, 260 src->ext.alpn_selected_len); 261 if (dest->ext.alpn_selected == NULL) 262 goto err; 263 } 264 265 #ifndef OPENSSL_NO_SRP 266 if (src->srp_username) { 267 dest->srp_username = OPENSSL_strdup(src->srp_username); 268 if (dest->srp_username == NULL) { 269 goto err; 270 } 271 } 272 #endif 273 274 if (src->ticket_appdata != NULL) { 275 dest->ticket_appdata = 276 OPENSSL_memdup(src->ticket_appdata, src->ticket_appdata_len); 277 if (dest->ticket_appdata == NULL) 278 goto err; 279 } 280 281 return dest; 282 err: 283 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 284 SSL_SESSION_free(dest); 285 return NULL; 286 } 287 288 const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *s, unsigned int *len) 289 { 290 if (len) 291 *len = (unsigned int)s->session_id_length; 292 return s->session_id; 293 } 294 const unsigned char *SSL_SESSION_get0_id_context(const SSL_SESSION *s, 295 unsigned int *len) 296 { 297 if (len != NULL) 298 *len = (unsigned int)s->sid_ctx_length; 299 return s->sid_ctx; 300 } 301 302 unsigned int SSL_SESSION_get_compress_id(const SSL_SESSION *s) 303 { 304 return s->compress_meth; 305 } 306 307 /* 308 * SSLv3/TLSv1 has 32 bytes (256 bits) of session ID space. As such, filling 309 * the ID with random junk repeatedly until we have no conflict is going to 310 * complete in one iteration pretty much "most" of the time (btw: 311 * understatement). So, if it takes us 10 iterations and we still can't avoid 312 * a conflict - well that's a reasonable point to call it quits. Either the 313 * RAND code is broken or someone is trying to open roughly very close to 314 * 2^256 SSL sessions to our server. How you might store that many sessions 315 * is perhaps a more interesting question ... 316 */ 317 318 #define MAX_SESS_ID_ATTEMPTS 10 319 static int def_generate_session_id(SSL *ssl, unsigned char *id, 320 unsigned int *id_len) 321 { 322 unsigned int retry = 0; 323 do 324 if (RAND_bytes_ex(ssl->ctx->libctx, id, *id_len, 0) <= 0) 325 return 0; 326 while (SSL_has_matching_session_id(ssl, id, *id_len) && 327 (++retry < MAX_SESS_ID_ATTEMPTS)) ; 328 if (retry < MAX_SESS_ID_ATTEMPTS) 329 return 1; 330 /* else - woops a session_id match */ 331 /* 332 * XXX We should also check the external cache -- but the probability of 333 * a collision is negligible, and we could not prevent the concurrent 334 * creation of sessions with identical IDs since we currently don't have 335 * means to atomically check whether a session ID already exists and make 336 * a reservation for it if it does not (this problem applies to the 337 * internal cache as well). 338 */ 339 return 0; 340 } 341 342 int ssl_generate_session_id(SSL *s, SSL_SESSION *ss) 343 { 344 unsigned int tmp; 345 GEN_SESSION_CB cb = def_generate_session_id; 346 347 switch (s->version) { 348 case SSL3_VERSION: 349 case TLS1_VERSION: 350 case TLS1_1_VERSION: 351 case TLS1_2_VERSION: 352 case TLS1_3_VERSION: 353 case DTLS1_BAD_VER: 354 case DTLS1_VERSION: 355 case DTLS1_2_VERSION: 356 ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; 357 break; 358 default: 359 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_UNSUPPORTED_SSL_VERSION); 360 return 0; 361 } 362 363 /*- 364 * If RFC5077 ticket, use empty session ID (as server). 365 * Note that: 366 * (a) ssl_get_prev_session() does lookahead into the 367 * ClientHello extensions to find the session ticket. 368 * When ssl_get_prev_session() fails, statem_srvr.c calls 369 * ssl_get_new_session() in tls_process_client_hello(). 370 * At that point, it has not yet parsed the extensions, 371 * however, because of the lookahead, it already knows 372 * whether a ticket is expected or not. 373 * 374 * (b) statem_clnt.c calls ssl_get_new_session() before parsing 375 * ServerHello extensions, and before recording the session 376 * ID received from the server, so this block is a noop. 377 */ 378 if (s->ext.ticket_expected) { 379 ss->session_id_length = 0; 380 return 1; 381 } 382 383 /* Choose which callback will set the session ID */ 384 if (!CRYPTO_THREAD_read_lock(s->lock)) 385 return 0; 386 if (!CRYPTO_THREAD_read_lock(s->session_ctx->lock)) { 387 CRYPTO_THREAD_unlock(s->lock); 388 SSLfatal(s, SSL_AD_INTERNAL_ERROR, 389 SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED); 390 return 0; 391 } 392 if (s->generate_session_id) 393 cb = s->generate_session_id; 394 else if (s->session_ctx->generate_session_id) 395 cb = s->session_ctx->generate_session_id; 396 CRYPTO_THREAD_unlock(s->session_ctx->lock); 397 CRYPTO_THREAD_unlock(s->lock); 398 /* Choose a session ID */ 399 memset(ss->session_id, 0, ss->session_id_length); 400 tmp = (int)ss->session_id_length; 401 if (!cb(s, ss->session_id, &tmp)) { 402 /* The callback failed */ 403 SSLfatal(s, SSL_AD_INTERNAL_ERROR, 404 SSL_R_SSL_SESSION_ID_CALLBACK_FAILED); 405 return 0; 406 } 407 /* 408 * Don't allow the callback to set the session length to zero. nor 409 * set it higher than it was. 410 */ 411 if (tmp == 0 || tmp > ss->session_id_length) { 412 /* The callback set an illegal length */ 413 SSLfatal(s, SSL_AD_INTERNAL_ERROR, 414 SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH); 415 return 0; 416 } 417 ss->session_id_length = tmp; 418 /* Finally, check for a conflict */ 419 if (SSL_has_matching_session_id(s, ss->session_id, 420 (unsigned int)ss->session_id_length)) { 421 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_SSL_SESSION_ID_CONFLICT); 422 return 0; 423 } 424 425 return 1; 426 } 427 428 int ssl_get_new_session(SSL *s, int session) 429 { 430 /* This gets used by clients and servers. */ 431 432 SSL_SESSION *ss = NULL; 433 434 if ((ss = SSL_SESSION_new()) == NULL) { 435 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE); 436 return 0; 437 } 438 439 /* If the context has a default timeout, use it */ 440 if (s->session_ctx->session_timeout == 0) 441 ss->timeout = SSL_get_default_timeout(s); 442 else 443 ss->timeout = s->session_ctx->session_timeout; 444 ssl_session_calculate_timeout(ss); 445 446 SSL_SESSION_free(s->session); 447 s->session = NULL; 448 449 if (session) { 450 if (SSL_IS_TLS13(s)) { 451 /* 452 * We generate the session id while constructing the 453 * NewSessionTicket in TLSv1.3. 454 */ 455 ss->session_id_length = 0; 456 } else if (!ssl_generate_session_id(s, ss)) { 457 /* SSLfatal() already called */ 458 SSL_SESSION_free(ss); 459 return 0; 460 } 461 462 } else { 463 ss->session_id_length = 0; 464 } 465 466 if (s->sid_ctx_length > sizeof(ss->sid_ctx)) { 467 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); 468 SSL_SESSION_free(ss); 469 return 0; 470 } 471 memcpy(ss->sid_ctx, s->sid_ctx, s->sid_ctx_length); 472 ss->sid_ctx_length = s->sid_ctx_length; 473 s->session = ss; 474 ss->ssl_version = s->version; 475 ss->verify_result = X509_V_OK; 476 477 /* If client supports extended master secret set it in session */ 478 if (s->s3.flags & TLS1_FLAGS_RECEIVED_EXTMS) 479 ss->flags |= SSL_SESS_FLAG_EXTMS; 480 481 return 1; 482 } 483 484 SSL_SESSION *lookup_sess_in_cache(SSL *s, const unsigned char *sess_id, 485 size_t sess_id_len) 486 { 487 SSL_SESSION *ret = NULL; 488 489 if ((s->session_ctx->session_cache_mode 490 & SSL_SESS_CACHE_NO_INTERNAL_LOOKUP) == 0) { 491 SSL_SESSION data; 492 493 data.ssl_version = s->version; 494 if (!ossl_assert(sess_id_len <= SSL_MAX_SSL_SESSION_ID_LENGTH)) 495 return NULL; 496 497 memcpy(data.session_id, sess_id, sess_id_len); 498 data.session_id_length = sess_id_len; 499 500 if (!CRYPTO_THREAD_read_lock(s->session_ctx->lock)) 501 return NULL; 502 ret = lh_SSL_SESSION_retrieve(s->session_ctx->sessions, &data); 503 if (ret != NULL) { 504 /* don't allow other threads to steal it: */ 505 SSL_SESSION_up_ref(ret); 506 } 507 CRYPTO_THREAD_unlock(s->session_ctx->lock); 508 if (ret == NULL) 509 ssl_tsan_counter(s->session_ctx, &s->session_ctx->stats.sess_miss); 510 } 511 512 if (ret == NULL && s->session_ctx->get_session_cb != NULL) { 513 int copy = 1; 514 515 ret = s->session_ctx->get_session_cb(s, sess_id, sess_id_len, ©); 516 517 if (ret != NULL) { 518 ssl_tsan_counter(s->session_ctx, 519 &s->session_ctx->stats.sess_cb_hit); 520 521 /* 522 * Increment reference count now if the session callback asks us 523 * to do so (note that if the session structures returned by the 524 * callback are shared between threads, it must handle the 525 * reference count itself [i.e. copy == 0], or things won't be 526 * thread-safe). 527 */ 528 if (copy) 529 SSL_SESSION_up_ref(ret); 530 531 /* 532 * Add the externally cached session to the internal cache as 533 * well if and only if we are supposed to. 534 */ 535 if ((s->session_ctx->session_cache_mode & 536 SSL_SESS_CACHE_NO_INTERNAL_STORE) == 0) { 537 /* 538 * Either return value of SSL_CTX_add_session should not 539 * interrupt the session resumption process. The return 540 * value is intentionally ignored. 541 */ 542 (void)SSL_CTX_add_session(s->session_ctx, ret); 543 } 544 } 545 } 546 547 return ret; 548 } 549 550 /*- 551 * ssl_get_prev attempts to find an SSL_SESSION to be used to resume this 552 * connection. It is only called by servers. 553 * 554 * hello: The parsed ClientHello data 555 * 556 * Returns: 557 * -1: fatal error 558 * 0: no session found 559 * 1: a session may have been found. 560 * 561 * Side effects: 562 * - If a session is found then s->session is pointed at it (after freeing an 563 * existing session if need be) and s->verify_result is set from the session. 564 * - Both for new and resumed sessions, s->ext.ticket_expected is set to 1 565 * if the server should issue a new session ticket (to 0 otherwise). 566 */ 567 int ssl_get_prev_session(SSL *s, CLIENTHELLO_MSG *hello) 568 { 569 /* This is used only by servers. */ 570 571 SSL_SESSION *ret = NULL; 572 int fatal = 0; 573 int try_session_cache = 0; 574 SSL_TICKET_STATUS r; 575 576 if (SSL_IS_TLS13(s)) { 577 /* 578 * By default we will send a new ticket. This can be overridden in the 579 * ticket processing. 580 */ 581 s->ext.ticket_expected = 1; 582 if (!tls_parse_extension(s, TLSEXT_IDX_psk_kex_modes, 583 SSL_EXT_CLIENT_HELLO, hello->pre_proc_exts, 584 NULL, 0) 585 || !tls_parse_extension(s, TLSEXT_IDX_psk, SSL_EXT_CLIENT_HELLO, 586 hello->pre_proc_exts, NULL, 0)) 587 return -1; 588 589 ret = s->session; 590 } else { 591 /* sets s->ext.ticket_expected */ 592 r = tls_get_ticket_from_client(s, hello, &ret); 593 switch (r) { 594 case SSL_TICKET_FATAL_ERR_MALLOC: 595 case SSL_TICKET_FATAL_ERR_OTHER: 596 fatal = 1; 597 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR); 598 goto err; 599 case SSL_TICKET_NONE: 600 case SSL_TICKET_EMPTY: 601 if (hello->session_id_len > 0) { 602 try_session_cache = 1; 603 ret = lookup_sess_in_cache(s, hello->session_id, 604 hello->session_id_len); 605 } 606 break; 607 case SSL_TICKET_NO_DECRYPT: 608 case SSL_TICKET_SUCCESS: 609 case SSL_TICKET_SUCCESS_RENEW: 610 break; 611 } 612 } 613 614 if (ret == NULL) 615 goto err; 616 617 /* Now ret is non-NULL and we own one of its reference counts. */ 618 619 /* Check TLS version consistency */ 620 if (ret->ssl_version != s->version) 621 goto err; 622 623 if (ret->sid_ctx_length != s->sid_ctx_length 624 || memcmp(ret->sid_ctx, s->sid_ctx, ret->sid_ctx_length)) { 625 /* 626 * We have the session requested by the client, but we don't want to 627 * use it in this context. 628 */ 629 goto err; /* treat like cache miss */ 630 } 631 632 if ((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0) { 633 /* 634 * We can't be sure if this session is being used out of context, 635 * which is especially important for SSL_VERIFY_PEER. The application 636 * should have used SSL[_CTX]_set_session_id_context. For this error 637 * case, we generate an error instead of treating the event like a 638 * cache miss (otherwise it would be easy for applications to 639 * effectively disable the session cache by accident without anyone 640 * noticing). 641 */ 642 643 SSLfatal(s, SSL_AD_INTERNAL_ERROR, 644 SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED); 645 fatal = 1; 646 goto err; 647 } 648 649 if (sess_timedout(time(NULL), ret)) { 650 ssl_tsan_counter(s->session_ctx, &s->session_ctx->stats.sess_timeout); 651 if (try_session_cache) { 652 /* session was from the cache, so remove it */ 653 SSL_CTX_remove_session(s->session_ctx, ret); 654 } 655 goto err; 656 } 657 658 /* Check extended master secret extension consistency */ 659 if (ret->flags & SSL_SESS_FLAG_EXTMS) { 660 /* If old session includes extms, but new does not: abort handshake */ 661 if (!(s->s3.flags & TLS1_FLAGS_RECEIVED_EXTMS)) { 662 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_INCONSISTENT_EXTMS); 663 fatal = 1; 664 goto err; 665 } 666 } else if (s->s3.flags & TLS1_FLAGS_RECEIVED_EXTMS) { 667 /* If new session includes extms, but old does not: do not resume */ 668 goto err; 669 } 670 671 if (!SSL_IS_TLS13(s)) { 672 /* We already did this for TLS1.3 */ 673 SSL_SESSION_free(s->session); 674 s->session = ret; 675 } 676 677 ssl_tsan_counter(s->session_ctx, &s->session_ctx->stats.sess_hit); 678 s->verify_result = s->session->verify_result; 679 return 1; 680 681 err: 682 if (ret != NULL) { 683 SSL_SESSION_free(ret); 684 /* In TLSv1.3 s->session was already set to ret, so we NULL it out */ 685 if (SSL_IS_TLS13(s)) 686 s->session = NULL; 687 688 if (!try_session_cache) { 689 /* 690 * The session was from a ticket, so we should issue a ticket for 691 * the new session 692 */ 693 s->ext.ticket_expected = 1; 694 } 695 } 696 if (fatal) 697 return -1; 698 699 return 0; 700 } 701 702 int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c) 703 { 704 int ret = 0; 705 SSL_SESSION *s; 706 707 /* 708 * add just 1 reference count for the SSL_CTX's session cache even though 709 * it has two ways of access: each session is in a doubly linked list and 710 * an lhash 711 */ 712 SSL_SESSION_up_ref(c); 713 /* 714 * if session c is in already in cache, we take back the increment later 715 */ 716 717 if (!CRYPTO_THREAD_write_lock(ctx->lock)) { 718 SSL_SESSION_free(c); 719 return 0; 720 } 721 s = lh_SSL_SESSION_insert(ctx->sessions, c); 722 723 /* 724 * s != NULL iff we already had a session with the given PID. In this 725 * case, s == c should hold (then we did not really modify 726 * ctx->sessions), or we're in trouble. 727 */ 728 if (s != NULL && s != c) { 729 /* We *are* in trouble ... */ 730 SSL_SESSION_list_remove(ctx, s); 731 SSL_SESSION_free(s); 732 /* 733 * ... so pretend the other session did not exist in cache (we cannot 734 * handle two SSL_SESSION structures with identical session ID in the 735 * same cache, which could happen e.g. when two threads concurrently 736 * obtain the same session from an external cache) 737 */ 738 s = NULL; 739 } else if (s == NULL && 740 lh_SSL_SESSION_retrieve(ctx->sessions, c) == NULL) { 741 /* s == NULL can also mean OOM error in lh_SSL_SESSION_insert ... */ 742 743 /* 744 * ... so take back the extra reference and also don't add 745 * the session to the SSL_SESSION_list at this time 746 */ 747 s = c; 748 } 749 750 /* Adjust last used time, and add back into the cache at the appropriate spot */ 751 if (ctx->session_cache_mode & SSL_SESS_CACHE_UPDATE_TIME) { 752 c->time = time(NULL); 753 ssl_session_calculate_timeout(c); 754 } 755 756 if (s == NULL) { 757 /* 758 * new cache entry -- remove old ones if cache has become too large 759 * delete cache entry *before* add, so we don't remove the one we're adding! 760 */ 761 762 ret = 1; 763 764 if (SSL_CTX_sess_get_cache_size(ctx) > 0) { 765 while (SSL_CTX_sess_number(ctx) >= SSL_CTX_sess_get_cache_size(ctx)) { 766 if (!remove_session_lock(ctx, ctx->session_cache_tail, 0)) 767 break; 768 else 769 ssl_tsan_counter(ctx, &ctx->stats.sess_cache_full); 770 } 771 } 772 } 773 774 SSL_SESSION_list_add(ctx, c); 775 776 if (s != NULL) { 777 /* 778 * existing cache entry -- decrement previously incremented reference 779 * count because it already takes into account the cache 780 */ 781 782 SSL_SESSION_free(s); /* s == c */ 783 ret = 0; 784 } 785 CRYPTO_THREAD_unlock(ctx->lock); 786 return ret; 787 } 788 789 int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c) 790 { 791 return remove_session_lock(ctx, c, 1); 792 } 793 794 static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck) 795 { 796 SSL_SESSION *r; 797 int ret = 0; 798 799 if ((c != NULL) && (c->session_id_length != 0)) { 800 if (lck) { 801 if (!CRYPTO_THREAD_write_lock(ctx->lock)) 802 return 0; 803 } 804 if ((r = lh_SSL_SESSION_retrieve(ctx->sessions, c)) != NULL) { 805 ret = 1; 806 r = lh_SSL_SESSION_delete(ctx->sessions, r); 807 SSL_SESSION_list_remove(ctx, r); 808 } 809 c->not_resumable = 1; 810 811 if (lck) 812 CRYPTO_THREAD_unlock(ctx->lock); 813 814 if (ctx->remove_session_cb != NULL) 815 ctx->remove_session_cb(ctx, c); 816 817 if (ret) 818 SSL_SESSION_free(r); 819 } 820 return ret; 821 } 822 823 void SSL_SESSION_free(SSL_SESSION *ss) 824 { 825 int i; 826 827 if (ss == NULL) 828 return; 829 CRYPTO_DOWN_REF(&ss->references, &i, ss->lock); 830 REF_PRINT_COUNT("SSL_SESSION", ss); 831 if (i > 0) 832 return; 833 REF_ASSERT_ISNT(i < 0); 834 835 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data); 836 837 OPENSSL_cleanse(ss->master_key, sizeof(ss->master_key)); 838 OPENSSL_cleanse(ss->session_id, sizeof(ss->session_id)); 839 X509_free(ss->peer); 840 sk_X509_pop_free(ss->peer_chain, X509_free); 841 OPENSSL_free(ss->ext.hostname); 842 OPENSSL_free(ss->ext.tick); 843 #ifndef OPENSSL_NO_PSK 844 OPENSSL_free(ss->psk_identity_hint); 845 OPENSSL_free(ss->psk_identity); 846 #endif 847 #ifndef OPENSSL_NO_SRP 848 OPENSSL_free(ss->srp_username); 849 #endif 850 OPENSSL_free(ss->ext.alpn_selected); 851 OPENSSL_free(ss->ticket_appdata); 852 CRYPTO_THREAD_lock_free(ss->lock); 853 OPENSSL_clear_free(ss, sizeof(*ss)); 854 } 855 856 int SSL_SESSION_up_ref(SSL_SESSION *ss) 857 { 858 int i; 859 860 if (CRYPTO_UP_REF(&ss->references, &i, ss->lock) <= 0) 861 return 0; 862 863 REF_PRINT_COUNT("SSL_SESSION", ss); 864 REF_ASSERT_ISNT(i < 2); 865 return ((i > 1) ? 1 : 0); 866 } 867 868 int SSL_set_session(SSL *s, SSL_SESSION *session) 869 { 870 ssl_clear_bad_session(s); 871 if (s->ctx->method != s->method) { 872 if (!SSL_set_ssl_method(s, s->ctx->method)) 873 return 0; 874 } 875 876 if (session != NULL) { 877 SSL_SESSION_up_ref(session); 878 s->verify_result = session->verify_result; 879 } 880 SSL_SESSION_free(s->session); 881 s->session = session; 882 883 return 1; 884 } 885 886 int SSL_SESSION_set1_id(SSL_SESSION *s, const unsigned char *sid, 887 unsigned int sid_len) 888 { 889 if (sid_len > SSL_MAX_SSL_SESSION_ID_LENGTH) { 890 ERR_raise(ERR_LIB_SSL, SSL_R_SSL_SESSION_ID_TOO_LONG); 891 return 0; 892 } 893 s->session_id_length = sid_len; 894 if (sid != s->session_id) 895 memcpy(s->session_id, sid, sid_len); 896 return 1; 897 } 898 899 long SSL_SESSION_set_timeout(SSL_SESSION *s, long t) 900 { 901 time_t new_timeout = (time_t)t; 902 903 if (s == NULL || t < 0) 904 return 0; 905 if (s->owner != NULL) { 906 if (!CRYPTO_THREAD_write_lock(s->owner->lock)) 907 return 0; 908 s->timeout = new_timeout; 909 ssl_session_calculate_timeout(s); 910 SSL_SESSION_list_add(s->owner, s); 911 CRYPTO_THREAD_unlock(s->owner->lock); 912 } else { 913 s->timeout = new_timeout; 914 ssl_session_calculate_timeout(s); 915 } 916 return 1; 917 } 918 919 long SSL_SESSION_get_timeout(const SSL_SESSION *s) 920 { 921 if (s == NULL) 922 return 0; 923 return (long)s->timeout; 924 } 925 926 long SSL_SESSION_get_time(const SSL_SESSION *s) 927 { 928 if (s == NULL) 929 return 0; 930 return (long)s->time; 931 } 932 933 long SSL_SESSION_set_time(SSL_SESSION *s, long t) 934 { 935 time_t new_time = (time_t)t; 936 937 if (s == NULL) 938 return 0; 939 if (s->owner != NULL) { 940 if (!CRYPTO_THREAD_write_lock(s->owner->lock)) 941 return 0; 942 s->time = new_time; 943 ssl_session_calculate_timeout(s); 944 SSL_SESSION_list_add(s->owner, s); 945 CRYPTO_THREAD_unlock(s->owner->lock); 946 } else { 947 s->time = new_time; 948 ssl_session_calculate_timeout(s); 949 } 950 return t; 951 } 952 953 int SSL_SESSION_get_protocol_version(const SSL_SESSION *s) 954 { 955 return s->ssl_version; 956 } 957 958 int SSL_SESSION_set_protocol_version(SSL_SESSION *s, int version) 959 { 960 s->ssl_version = version; 961 return 1; 962 } 963 964 const SSL_CIPHER *SSL_SESSION_get0_cipher(const SSL_SESSION *s) 965 { 966 return s->cipher; 967 } 968 969 int SSL_SESSION_set_cipher(SSL_SESSION *s, const SSL_CIPHER *cipher) 970 { 971 s->cipher = cipher; 972 return 1; 973 } 974 975 const char *SSL_SESSION_get0_hostname(const SSL_SESSION *s) 976 { 977 return s->ext.hostname; 978 } 979 980 int SSL_SESSION_set1_hostname(SSL_SESSION *s, const char *hostname) 981 { 982 OPENSSL_free(s->ext.hostname); 983 if (hostname == NULL) { 984 s->ext.hostname = NULL; 985 return 1; 986 } 987 s->ext.hostname = OPENSSL_strdup(hostname); 988 989 return s->ext.hostname != NULL; 990 } 991 992 int SSL_SESSION_has_ticket(const SSL_SESSION *s) 993 { 994 return (s->ext.ticklen > 0) ? 1 : 0; 995 } 996 997 unsigned long SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION *s) 998 { 999 return s->ext.tick_lifetime_hint; 1000 } 1001 1002 void SSL_SESSION_get0_ticket(const SSL_SESSION *s, const unsigned char **tick, 1003 size_t *len) 1004 { 1005 *len = s->ext.ticklen; 1006 if (tick != NULL) 1007 *tick = s->ext.tick; 1008 } 1009 1010 uint32_t SSL_SESSION_get_max_early_data(const SSL_SESSION *s) 1011 { 1012 return s->ext.max_early_data; 1013 } 1014 1015 int SSL_SESSION_set_max_early_data(SSL_SESSION *s, uint32_t max_early_data) 1016 { 1017 s->ext.max_early_data = max_early_data; 1018 1019 return 1; 1020 } 1021 1022 void SSL_SESSION_get0_alpn_selected(const SSL_SESSION *s, 1023 const unsigned char **alpn, 1024 size_t *len) 1025 { 1026 *alpn = s->ext.alpn_selected; 1027 *len = s->ext.alpn_selected_len; 1028 } 1029 1030 int SSL_SESSION_set1_alpn_selected(SSL_SESSION *s, const unsigned char *alpn, 1031 size_t len) 1032 { 1033 OPENSSL_free(s->ext.alpn_selected); 1034 if (alpn == NULL || len == 0) { 1035 s->ext.alpn_selected = NULL; 1036 s->ext.alpn_selected_len = 0; 1037 return 1; 1038 } 1039 s->ext.alpn_selected = OPENSSL_memdup(alpn, len); 1040 if (s->ext.alpn_selected == NULL) { 1041 s->ext.alpn_selected_len = 0; 1042 return 0; 1043 } 1044 s->ext.alpn_selected_len = len; 1045 1046 return 1; 1047 } 1048 1049 X509 *SSL_SESSION_get0_peer(SSL_SESSION *s) 1050 { 1051 return s->peer; 1052 } 1053 1054 int SSL_SESSION_set1_id_context(SSL_SESSION *s, const unsigned char *sid_ctx, 1055 unsigned int sid_ctx_len) 1056 { 1057 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { 1058 ERR_raise(ERR_LIB_SSL, SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); 1059 return 0; 1060 } 1061 s->sid_ctx_length = sid_ctx_len; 1062 if (sid_ctx != s->sid_ctx) 1063 memcpy(s->sid_ctx, sid_ctx, sid_ctx_len); 1064 1065 return 1; 1066 } 1067 1068 int SSL_SESSION_is_resumable(const SSL_SESSION *s) 1069 { 1070 /* 1071 * In the case of EAP-FAST, we can have a pre-shared "ticket" without a 1072 * session ID. 1073 */ 1074 return !s->not_resumable 1075 && (s->session_id_length > 0 || s->ext.ticklen > 0); 1076 } 1077 1078 long SSL_CTX_set_timeout(SSL_CTX *s, long t) 1079 { 1080 long l; 1081 if (s == NULL) 1082 return 0; 1083 l = s->session_timeout; 1084 s->session_timeout = t; 1085 return l; 1086 } 1087 1088 long SSL_CTX_get_timeout(const SSL_CTX *s) 1089 { 1090 if (s == NULL) 1091 return 0; 1092 return s->session_timeout; 1093 } 1094 1095 int SSL_set_session_secret_cb(SSL *s, 1096 tls_session_secret_cb_fn tls_session_secret_cb, 1097 void *arg) 1098 { 1099 if (s == NULL) 1100 return 0; 1101 s->ext.session_secret_cb = tls_session_secret_cb; 1102 s->ext.session_secret_cb_arg = arg; 1103 return 1; 1104 } 1105 1106 int SSL_set_session_ticket_ext_cb(SSL *s, tls_session_ticket_ext_cb_fn cb, 1107 void *arg) 1108 { 1109 if (s == NULL) 1110 return 0; 1111 s->ext.session_ticket_cb = cb; 1112 s->ext.session_ticket_cb_arg = arg; 1113 return 1; 1114 } 1115 1116 int SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len) 1117 { 1118 if (s->version >= TLS1_VERSION) { 1119 OPENSSL_free(s->ext.session_ticket); 1120 s->ext.session_ticket = NULL; 1121 s->ext.session_ticket = 1122 OPENSSL_malloc(sizeof(TLS_SESSION_TICKET_EXT) + ext_len); 1123 if (s->ext.session_ticket == NULL) { 1124 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE); 1125 return 0; 1126 } 1127 1128 if (ext_data != NULL) { 1129 s->ext.session_ticket->length = ext_len; 1130 s->ext.session_ticket->data = s->ext.session_ticket + 1; 1131 memcpy(s->ext.session_ticket->data, ext_data, ext_len); 1132 } else { 1133 s->ext.session_ticket->length = 0; 1134 s->ext.session_ticket->data = NULL; 1135 } 1136 1137 return 1; 1138 } 1139 1140 return 0; 1141 } 1142 1143 void SSL_CTX_flush_sessions(SSL_CTX *s, long t) 1144 { 1145 STACK_OF(SSL_SESSION) *sk; 1146 SSL_SESSION *current; 1147 unsigned long i; 1148 1149 if (!CRYPTO_THREAD_write_lock(s->lock)) 1150 return; 1151 1152 sk = sk_SSL_SESSION_new_null(); 1153 i = lh_SSL_SESSION_get_down_load(s->sessions); 1154 lh_SSL_SESSION_set_down_load(s->sessions, 0); 1155 1156 /* 1157 * Iterate over the list from the back (oldest), and stop 1158 * when a session can no longer be removed. 1159 * Add the session to a temporary list to be freed outside 1160 * the SSL_CTX lock. 1161 * But still do the remove_session_cb() within the lock. 1162 */ 1163 while (s->session_cache_tail != NULL) { 1164 current = s->session_cache_tail; 1165 if (t == 0 || sess_timedout((time_t)t, current)) { 1166 lh_SSL_SESSION_delete(s->sessions, current); 1167 SSL_SESSION_list_remove(s, current); 1168 current->not_resumable = 1; 1169 if (s->remove_session_cb != NULL) 1170 s->remove_session_cb(s, current); 1171 /* 1172 * Throw the session on a stack, it's entirely plausible 1173 * that while freeing outside the critical section, the 1174 * session could be re-added, so avoid using the next/prev 1175 * pointers. If the stack failed to create, or the session 1176 * couldn't be put on the stack, just free it here 1177 */ 1178 if (sk == NULL || !sk_SSL_SESSION_push(sk, current)) 1179 SSL_SESSION_free(current); 1180 } else { 1181 break; 1182 } 1183 } 1184 1185 lh_SSL_SESSION_set_down_load(s->sessions, i); 1186 CRYPTO_THREAD_unlock(s->lock); 1187 1188 sk_SSL_SESSION_pop_free(sk, SSL_SESSION_free); 1189 } 1190 1191 int ssl_clear_bad_session(SSL *s) 1192 { 1193 if ((s->session != NULL) && 1194 !(s->shutdown & SSL_SENT_SHUTDOWN) && 1195 !(SSL_in_init(s) || SSL_in_before(s))) { 1196 SSL_CTX_remove_session(s->session_ctx, s->session); 1197 return 1; 1198 } else 1199 return 0; 1200 } 1201 1202 /* locked by SSL_CTX in the calling function */ 1203 static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s) 1204 { 1205 if ((s->next == NULL) || (s->prev == NULL)) 1206 return; 1207 1208 if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail)) { 1209 /* last element in list */ 1210 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { 1211 /* only one element in list */ 1212 ctx->session_cache_head = NULL; 1213 ctx->session_cache_tail = NULL; 1214 } else { 1215 ctx->session_cache_tail = s->prev; 1216 s->prev->next = (SSL_SESSION *)&(ctx->session_cache_tail); 1217 } 1218 } else { 1219 if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { 1220 /* first element in list */ 1221 ctx->session_cache_head = s->next; 1222 s->next->prev = (SSL_SESSION *)&(ctx->session_cache_head); 1223 } else { 1224 /* middle of list */ 1225 s->next->prev = s->prev; 1226 s->prev->next = s->next; 1227 } 1228 } 1229 s->prev = s->next = NULL; 1230 s->owner = NULL; 1231 } 1232 1233 static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s) 1234 { 1235 SSL_SESSION *next; 1236 1237 if ((s->next != NULL) && (s->prev != NULL)) 1238 SSL_SESSION_list_remove(ctx, s); 1239 1240 if (ctx->session_cache_head == NULL) { 1241 ctx->session_cache_head = s; 1242 ctx->session_cache_tail = s; 1243 s->prev = (SSL_SESSION *)&(ctx->session_cache_head); 1244 s->next = (SSL_SESSION *)&(ctx->session_cache_tail); 1245 } else { 1246 if (timeoutcmp(s, ctx->session_cache_head) >= 0) { 1247 /* 1248 * if we timeout after (or the same time as) the first 1249 * session, put us first - usual case 1250 */ 1251 s->next = ctx->session_cache_head; 1252 s->next->prev = s; 1253 s->prev = (SSL_SESSION *)&(ctx->session_cache_head); 1254 ctx->session_cache_head = s; 1255 } else if (timeoutcmp(s, ctx->session_cache_tail) < 0) { 1256 /* if we timeout before the last session, put us last */ 1257 s->prev = ctx->session_cache_tail; 1258 s->prev->next = s; 1259 s->next = (SSL_SESSION *)&(ctx->session_cache_tail); 1260 ctx->session_cache_tail = s; 1261 } else { 1262 /* 1263 * we timeout somewhere in-between - if there is only 1264 * one session in the cache it will be caught above 1265 */ 1266 next = ctx->session_cache_head->next; 1267 while (next != (SSL_SESSION*)&(ctx->session_cache_tail)) { 1268 if (timeoutcmp(s, next) >= 0) { 1269 s->next = next; 1270 s->prev = next->prev; 1271 next->prev->next = s; 1272 next->prev = s; 1273 break; 1274 } 1275 next = next->next; 1276 } 1277 } 1278 } 1279 s->owner = ctx; 1280 } 1281 1282 void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx, 1283 int (*cb) (struct ssl_st *ssl, SSL_SESSION *sess)) 1284 { 1285 ctx->new_session_cb = cb; 1286 } 1287 1288 int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx)) (SSL *ssl, SSL_SESSION *sess) { 1289 return ctx->new_session_cb; 1290 } 1291 1292 void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx, 1293 void (*cb) (SSL_CTX *ctx, SSL_SESSION *sess)) 1294 { 1295 ctx->remove_session_cb = cb; 1296 } 1297 1298 void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx)) (SSL_CTX *ctx, 1299 SSL_SESSION *sess) { 1300 return ctx->remove_session_cb; 1301 } 1302 1303 void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx, 1304 SSL_SESSION *(*cb) (struct ssl_st *ssl, 1305 const unsigned char *data, 1306 int len, int *copy)) 1307 { 1308 ctx->get_session_cb = cb; 1309 } 1310 1311 SSL_SESSION *(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx)) (SSL *ssl, 1312 const unsigned char 1313 *data, int len, 1314 int *copy) { 1315 return ctx->get_session_cb; 1316 } 1317 1318 void SSL_CTX_set_info_callback(SSL_CTX *ctx, 1319 void (*cb) (const SSL *ssl, int type, int val)) 1320 { 1321 ctx->info_callback = cb; 1322 } 1323 1324 void (*SSL_CTX_get_info_callback(SSL_CTX *ctx)) (const SSL *ssl, int type, 1325 int val) { 1326 return ctx->info_callback; 1327 } 1328 1329 void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx, 1330 int (*cb) (SSL *ssl, X509 **x509, 1331 EVP_PKEY **pkey)) 1332 { 1333 ctx->client_cert_cb = cb; 1334 } 1335 1336 int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx)) (SSL *ssl, X509 **x509, 1337 EVP_PKEY **pkey) { 1338 return ctx->client_cert_cb; 1339 } 1340 1341 void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx, 1342 int (*cb) (SSL *ssl, 1343 unsigned char *cookie, 1344 unsigned int *cookie_len)) 1345 { 1346 ctx->app_gen_cookie_cb = cb; 1347 } 1348 1349 void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx, 1350 int (*cb) (SSL *ssl, 1351 const unsigned char *cookie, 1352 unsigned int cookie_len)) 1353 { 1354 ctx->app_verify_cookie_cb = cb; 1355 } 1356 1357 int SSL_SESSION_set1_ticket_appdata(SSL_SESSION *ss, const void *data, size_t len) 1358 { 1359 OPENSSL_free(ss->ticket_appdata); 1360 ss->ticket_appdata_len = 0; 1361 if (data == NULL || len == 0) { 1362 ss->ticket_appdata = NULL; 1363 return 1; 1364 } 1365 ss->ticket_appdata = OPENSSL_memdup(data, len); 1366 if (ss->ticket_appdata != NULL) { 1367 ss->ticket_appdata_len = len; 1368 return 1; 1369 } 1370 return 0; 1371 } 1372 1373 int SSL_SESSION_get0_ticket_appdata(SSL_SESSION *ss, void **data, size_t *len) 1374 { 1375 *data = ss->ticket_appdata; 1376 *len = ss->ticket_appdata_len; 1377 return 1; 1378 } 1379 1380 void SSL_CTX_set_stateless_cookie_generate_cb( 1381 SSL_CTX *ctx, 1382 int (*cb) (SSL *ssl, 1383 unsigned char *cookie, 1384 size_t *cookie_len)) 1385 { 1386 ctx->gen_stateless_cookie_cb = cb; 1387 } 1388 1389 void SSL_CTX_set_stateless_cookie_verify_cb( 1390 SSL_CTX *ctx, 1391 int (*cb) (SSL *ssl, 1392 const unsigned char *cookie, 1393 size_t cookie_len)) 1394 { 1395 ctx->verify_stateless_cookie_cb = cb; 1396 } 1397 1398 IMPLEMENT_PEM_rw(SSL_SESSION, SSL_SESSION, PEM_STRING_SSL_SESSION, SSL_SESSION) 1399