155714Skris/* ssl/ssl_sess.c */ 255714Skris/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 355714Skris * All rights reserved. 455714Skris * 555714Skris * This package is an SSL implementation written 655714Skris * by Eric Young (eay@cryptsoft.com). 755714Skris * The implementation was written so as to conform with Netscapes SSL. 8280304Sjkim * 955714Skris * This library is free for commercial and non-commercial use as long as 1055714Skris * the following conditions are aheared to. The following conditions 1155714Skris * apply to all code found in this distribution, be it the RC4, RSA, 1255714Skris * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1355714Skris * included with this distribution is covered by the same copyright terms 1455714Skris * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15280304Sjkim * 1655714Skris * Copyright remains Eric Young's, and as such any Copyright notices in 1755714Skris * the code are not to be removed. 1855714Skris * If this package is used in a product, Eric Young should be given attribution 1955714Skris * as the author of the parts of the library used. 2055714Skris * This can be in the form of a textual message at program startup or 2155714Skris * in documentation (online or textual) provided with the package. 22280304Sjkim * 2355714Skris * Redistribution and use in source and binary forms, with or without 2455714Skris * modification, are permitted provided that the following conditions 2555714Skris * are met: 2655714Skris * 1. Redistributions of source code must retain the copyright 2755714Skris * notice, this list of conditions and the following disclaimer. 2855714Skris * 2. Redistributions in binary form must reproduce the above copyright 2955714Skris * notice, this list of conditions and the following disclaimer in the 3055714Skris * documentation and/or other materials provided with the distribution. 3155714Skris * 3. All advertising materials mentioning features or use of this software 3255714Skris * must display the following acknowledgement: 3355714Skris * "This product includes cryptographic software written by 3455714Skris * Eric Young (eay@cryptsoft.com)" 3555714Skris * The word 'cryptographic' can be left out if the rouines from the library 3655714Skris * being used are not cryptographic related :-). 37280304Sjkim * 4. If you include any Windows specific code (or a derivative thereof) from 3855714Skris * the apps directory (application code) you must include an acknowledgement: 3955714Skris * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40280304Sjkim * 4155714Skris * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4255714Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4355714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4455714Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4555714Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4655714Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4755714Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4955714Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5055714Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5155714Skris * SUCH DAMAGE. 52280304Sjkim * 5355714Skris * The licence and distribution terms for any publically available version or 5455714Skris * derivative of this code cannot be changed. i.e. this code cannot simply be 5555714Skris * copied and put under another distribution licence 5655714Skris * [including the GNU Public Licence.] 5755714Skris */ 58238405Sjkim/* ==================================================================== 59238405Sjkim * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved. 60238405Sjkim * 61238405Sjkim * Redistribution and use in source and binary forms, with or without 62238405Sjkim * modification, are permitted provided that the following conditions 63238405Sjkim * are met: 64238405Sjkim * 65238405Sjkim * 1. Redistributions of source code must retain the above copyright 66280304Sjkim * notice, this list of conditions and the following disclaimer. 67238405Sjkim * 68238405Sjkim * 2. Redistributions in binary form must reproduce the above copyright 69238405Sjkim * notice, this list of conditions and the following disclaimer in 70238405Sjkim * the documentation and/or other materials provided with the 71238405Sjkim * distribution. 72238405Sjkim * 73238405Sjkim * 3. All advertising materials mentioning features or use of this 74238405Sjkim * software must display the following acknowledgment: 75238405Sjkim * "This product includes software developed by the OpenSSL Project 76238405Sjkim * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 77238405Sjkim * 78238405Sjkim * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 79238405Sjkim * endorse or promote products derived from this software without 80238405Sjkim * prior written permission. For written permission, please contact 81238405Sjkim * openssl-core@openssl.org. 82238405Sjkim * 83238405Sjkim * 5. Products derived from this software may not be called "OpenSSL" 84238405Sjkim * nor may "OpenSSL" appear in their names without prior written 85238405Sjkim * permission of the OpenSSL Project. 86238405Sjkim * 87238405Sjkim * 6. Redistributions of any form whatsoever must retain the following 88238405Sjkim * acknowledgment: 89238405Sjkim * "This product includes software developed by the OpenSSL Project 90238405Sjkim * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 91238405Sjkim * 92238405Sjkim * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 93238405Sjkim * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 94238405Sjkim * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 95238405Sjkim * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 96238405Sjkim * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 97238405Sjkim * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 98238405Sjkim * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 99238405Sjkim * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 100238405Sjkim * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 101238405Sjkim * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 102238405Sjkim * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 103238405Sjkim * OF THE POSSIBILITY OF SUCH DAMAGE. 104238405Sjkim * ==================================================================== 105238405Sjkim * 106238405Sjkim * This product includes cryptographic software written by Eric Young 107238405Sjkim * (eay@cryptsoft.com). This product includes software written by Tim 108238405Sjkim * Hudson (tjh@cryptsoft.com). 109238405Sjkim * 110238405Sjkim */ 111238405Sjkim/* ==================================================================== 112238405Sjkim * Copyright 2005 Nokia. All rights reserved. 113238405Sjkim * 114238405Sjkim * The portions of the attached software ("Contribution") is developed by 115238405Sjkim * Nokia Corporation and is licensed pursuant to the OpenSSL open source 116238405Sjkim * license. 117238405Sjkim * 118238405Sjkim * The Contribution, originally written by Mika Kousa and Pasi Eronen of 119238405Sjkim * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites 120238405Sjkim * support (see RFC 4279) to OpenSSL. 121238405Sjkim * 122238405Sjkim * No patent licenses or other rights except those expressly stated in 123238405Sjkim * the OpenSSL open source license shall be deemed granted or received 124238405Sjkim * expressly, by implication, estoppel, or otherwise. 125238405Sjkim * 126238405Sjkim * No assurances are provided by Nokia that the Contribution does not 127238405Sjkim * infringe the patent or other intellectual property rights of any third 128238405Sjkim * party or that the license provides you with all the necessary rights 129238405Sjkim * to make use of the Contribution. 130238405Sjkim * 131238405Sjkim * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN 132238405Sjkim * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA 133238405Sjkim * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY 134238405Sjkim * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR 135238405Sjkim * OTHERWISE. 136238405Sjkim */ 13755714Skris 13855714Skris#include <stdio.h> 13955714Skris#include <openssl/lhash.h> 14055714Skris#include <openssl/rand.h> 141194206Ssimon#ifndef OPENSSL_NO_ENGINE 142280304Sjkim# include <openssl/engine.h> 143194206Ssimon#endif 14455714Skris#include "ssl_locl.h" 14555714Skris 14655714Skrisstatic void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s); 147280304Sjkimstatic void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s); 14855714Skrisstatic int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck); 14955714Skris 150160814SsimonSSL_SESSION *SSL_get_session(const SSL *ssl) 15159191Skris/* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */ 152280304Sjkim{ 153280304Sjkim return (ssl->session); 154280304Sjkim} 15555714Skris 15659191SkrisSSL_SESSION *SSL_get1_session(SSL *ssl) 15759191Skris/* variant of SSL_get_session: caller really gets something */ 158280304Sjkim{ 159280304Sjkim SSL_SESSION *sess; 160280304Sjkim /* 161280304Sjkim * Need to lock this all up rather than just use CRYPTO_add so that 162280304Sjkim * somebody doesn't free ssl->session between when we check it's non-null 163280304Sjkim * and when we up the reference count. 164280304Sjkim */ 165280304Sjkim CRYPTO_w_lock(CRYPTO_LOCK_SSL_SESSION); 166280304Sjkim sess = ssl->session; 167280304Sjkim if (sess) 168280304Sjkim sess->references++; 169280304Sjkim CRYPTO_w_unlock(CRYPTO_LOCK_SSL_SESSION); 170280304Sjkim return (sess); 171280304Sjkim} 17259191Skris 173280304Sjkimint SSL_SESSION_get_ex_new_index(long argl, void *argp, 174280304Sjkim CRYPTO_EX_new *new_func, 175280304Sjkim CRYPTO_EX_dup *dup_func, 176280304Sjkim CRYPTO_EX_free *free_func) 177280304Sjkim{ 178280304Sjkim return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_SESSION, argl, argp, 179280304Sjkim new_func, dup_func, free_func); 180280304Sjkim} 18155714Skris 18255714Skrisint SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg) 183280304Sjkim{ 184280304Sjkim return (CRYPTO_set_ex_data(&s->ex_data, idx, arg)); 185280304Sjkim} 18655714Skris 187160814Ssimonvoid *SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx) 188280304Sjkim{ 189280304Sjkim return (CRYPTO_get_ex_data(&s->ex_data, idx)); 190280304Sjkim} 19155714Skris 19255714SkrisSSL_SESSION *SSL_SESSION_new(void) 193280304Sjkim{ 194280304Sjkim SSL_SESSION *ss; 19555714Skris 196280304Sjkim ss = (SSL_SESSION *)OPENSSL_malloc(sizeof(SSL_SESSION)); 197280304Sjkim if (ss == NULL) { 198280304Sjkim SSLerr(SSL_F_SSL_SESSION_NEW, ERR_R_MALLOC_FAILURE); 199280304Sjkim return (0); 200280304Sjkim } 201280304Sjkim memset(ss, 0, sizeof(SSL_SESSION)); 20255714Skris 203280304Sjkim ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */ 204280304Sjkim ss->references = 1; 205280304Sjkim ss->timeout = 60 * 5 + 4; /* 5 minute timeout by default */ 206280304Sjkim ss->time = (unsigned long)time(NULL); 207280304Sjkim ss->prev = NULL; 208280304Sjkim ss->next = NULL; 209280304Sjkim ss->compress_meth = 0; 210194206Ssimon#ifndef OPENSSL_NO_TLSEXT 211280304Sjkim ss->tlsext_hostname = NULL; 212280304Sjkim# ifndef OPENSSL_NO_EC 213280304Sjkim ss->tlsext_ecpointformatlist_length = 0; 214280304Sjkim ss->tlsext_ecpointformatlist = NULL; 215280304Sjkim ss->tlsext_ellipticcurvelist_length = 0; 216280304Sjkim ss->tlsext_ellipticcurvelist = NULL; 217280304Sjkim# endif 218194206Ssimon#endif 219280304Sjkim CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data); 220238405Sjkim#ifndef OPENSSL_NO_PSK 221280304Sjkim ss->psk_identity_hint = NULL; 222280304Sjkim ss->psk_identity = NULL; 223238405Sjkim#endif 224238405Sjkim#ifndef OPENSSL_NO_SRP 225280304Sjkim ss->srp_username = NULL; 226238405Sjkim#endif 227280304Sjkim return (ss); 228280304Sjkim} 22955714Skris 230284285Sjkim/* 231284285Sjkim * Create a new SSL_SESSION and duplicate the contents of |src| into it. If 232284285Sjkim * ticket == 0 then no ticket information is duplicated, otherwise it is. 233284285Sjkim */ 234284285SjkimSSL_SESSION *ssl_session_dup(SSL_SESSION *src, int ticket) 235284285Sjkim{ 236284285Sjkim SSL_SESSION *dest; 237284285Sjkim 238284285Sjkim dest = OPENSSL_malloc(sizeof(*src)); 239284285Sjkim if (dest == NULL) { 240284285Sjkim goto err; 241284285Sjkim } 242284285Sjkim memcpy(dest, src, sizeof(*dest)); 243284285Sjkim 244284285Sjkim /* 245284285Sjkim * Set the various pointers to NULL so that we can call SSL_SESSION_free in 246284285Sjkim * the case of an error whilst halfway through constructing dest 247284285Sjkim */ 248284285Sjkim#ifndef OPENSSL_NO_PSK 249284285Sjkim dest->psk_identity_hint = NULL; 250284285Sjkim dest->psk_identity = NULL; 251284285Sjkim#endif 252284285Sjkim dest->ciphers = NULL; 253284285Sjkim#ifndef OPENSSL_NO_TLSEXT 254284285Sjkim dest->tlsext_hostname = NULL; 255284285Sjkim# ifndef OPENSSL_NO_EC 256284285Sjkim dest->tlsext_ecpointformatlist = NULL; 257284285Sjkim dest->tlsext_ellipticcurvelist = NULL; 258284285Sjkim# endif 259291721Sjkim dest->tlsext_tick = NULL; 260284285Sjkim#endif 261284285Sjkim#ifndef OPENSSL_NO_SRP 262284285Sjkim dest->srp_username = NULL; 263284285Sjkim#endif 264284285Sjkim memset(&dest->ex_data, 0, sizeof(dest->ex_data)); 265284285Sjkim 266284285Sjkim /* We deliberately don't copy the prev and next pointers */ 267284285Sjkim dest->prev = NULL; 268284285Sjkim dest->next = NULL; 269284285Sjkim 270284285Sjkim dest->references = 1; 271284285Sjkim 272284285Sjkim if (src->sess_cert != NULL) 273284285Sjkim CRYPTO_add(&src->sess_cert->references, 1, CRYPTO_LOCK_SSL_SESS_CERT); 274284285Sjkim 275284285Sjkim if (src->peer != NULL) 276284285Sjkim CRYPTO_add(&src->peer->references, 1, CRYPTO_LOCK_X509); 277284285Sjkim 278284285Sjkim#ifndef OPENSSL_NO_PSK 279284285Sjkim if (src->psk_identity_hint) { 280284285Sjkim dest->psk_identity_hint = BUF_strdup(src->psk_identity_hint); 281284285Sjkim if (dest->psk_identity_hint == NULL) { 282284285Sjkim goto err; 283284285Sjkim } 284284285Sjkim } 285284285Sjkim if (src->psk_identity) { 286284285Sjkim dest->psk_identity = BUF_strdup(src->psk_identity); 287284285Sjkim if (dest->psk_identity == NULL) { 288284285Sjkim goto err; 289284285Sjkim } 290284285Sjkim } 291284285Sjkim#endif 292284285Sjkim 293284285Sjkim if(src->ciphers != NULL) { 294284285Sjkim dest->ciphers = sk_SSL_CIPHER_dup(src->ciphers); 295284285Sjkim if (dest->ciphers == NULL) 296284285Sjkim goto err; 297284285Sjkim } 298284285Sjkim 299284285Sjkim if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, 300284285Sjkim &dest->ex_data, &src->ex_data)) { 301284285Sjkim goto err; 302284285Sjkim } 303284285Sjkim 304284285Sjkim#ifndef OPENSSL_NO_TLSEXT 305284285Sjkim if (src->tlsext_hostname) { 306284285Sjkim dest->tlsext_hostname = BUF_strdup(src->tlsext_hostname); 307284285Sjkim if (dest->tlsext_hostname == NULL) { 308284285Sjkim goto err; 309284285Sjkim } 310284285Sjkim } 311284285Sjkim# ifndef OPENSSL_NO_EC 312284285Sjkim if (src->tlsext_ecpointformatlist) { 313284285Sjkim dest->tlsext_ecpointformatlist = 314284285Sjkim BUF_memdup(src->tlsext_ecpointformatlist, 315284285Sjkim src->tlsext_ecpointformatlist_length); 316284285Sjkim if (dest->tlsext_ecpointformatlist == NULL) 317284285Sjkim goto err; 318284285Sjkim } 319284285Sjkim if (src->tlsext_ellipticcurvelist) { 320284285Sjkim dest->tlsext_ellipticcurvelist = 321284285Sjkim BUF_memdup(src->tlsext_ellipticcurvelist, 322284285Sjkim src->tlsext_ellipticcurvelist_length); 323284285Sjkim if (dest->tlsext_ellipticcurvelist == NULL) 324284285Sjkim goto err; 325284285Sjkim } 326284285Sjkim# endif 327284285Sjkim 328284285Sjkim if (ticket != 0) { 329284285Sjkim dest->tlsext_tick = BUF_memdup(src->tlsext_tick, src->tlsext_ticklen); 330284285Sjkim if(dest->tlsext_tick == NULL) 331284285Sjkim goto err; 332284285Sjkim } else { 333284285Sjkim dest->tlsext_tick_lifetime_hint = 0; 334284285Sjkim dest->tlsext_ticklen = 0; 335284285Sjkim } 336291721Sjkim#endif 337284285Sjkim 338284285Sjkim#ifndef OPENSSL_NO_SRP 339284285Sjkim if (src->srp_username) { 340284285Sjkim dest->srp_username = BUF_strdup(src->srp_username); 341284285Sjkim if (dest->srp_username == NULL) { 342284285Sjkim goto err; 343284285Sjkim } 344284285Sjkim } 345284285Sjkim#endif 346284285Sjkim 347284285Sjkim return dest; 348284285Sjkimerr: 349284285Sjkim SSLerr(SSL_F_SSL_SESSION_DUP, ERR_R_MALLOC_FAILURE); 350284285Sjkim SSL_SESSION_free(dest); 351284285Sjkim return NULL; 352284285Sjkim} 353284285Sjkim 354280304Sjkimconst unsigned char *SSL_SESSION_get_id(const SSL_SESSION *s, 355280304Sjkim unsigned int *len) 356280304Sjkim{ 357280304Sjkim if (len) 358280304Sjkim *len = s->session_id_length; 359280304Sjkim return s->session_id; 360280304Sjkim} 361160814Ssimon 362238405Sjkimunsigned int SSL_SESSION_get_compress_id(const SSL_SESSION *s) 363280304Sjkim{ 364280304Sjkim return s->compress_meth; 365280304Sjkim} 366238405Sjkim 367280304Sjkim/* 368280304Sjkim * Even with SSLv2, we have 16 bytes (128 bits) of session ID space. 369280304Sjkim * SSLv3/TLSv1 has 32 bytes (256 bits). As such, filling the ID with random 370280304Sjkim * gunk repeatedly until we have no conflict is going to complete in one 371280304Sjkim * iteration pretty much "most" of the time (btw: understatement). So, if it 372280304Sjkim * takes us 10 iterations and we still can't avoid a conflict - well that's a 373280304Sjkim * reasonable point to call it quits. Either the RAND code is broken or 374280304Sjkim * someone is trying to open roughly very close to 2^128 (or 2^256) SSL 375280304Sjkim * sessions to our server. How you might store that many sessions is perhaps 376280304Sjkim * a more interesting question ... 377280304Sjkim */ 378109998Smarkm 379109998Smarkm#define MAX_SESS_ID_ATTEMPTS 10 380109998Smarkmstatic int def_generate_session_id(const SSL *ssl, unsigned char *id, 381280304Sjkim unsigned int *id_len) 382109998Smarkm{ 383280304Sjkim unsigned int retry = 0; 384280304Sjkim do 385306196Sjkim if (RAND_bytes(id, *id_len) <= 0) 386280304Sjkim return 0; 387280304Sjkim while (SSL_has_matching_session_id(ssl, id, *id_len) && 388280304Sjkim (++retry < MAX_SESS_ID_ATTEMPTS)) ; 389280304Sjkim if (retry < MAX_SESS_ID_ATTEMPTS) 390280304Sjkim return 1; 391280304Sjkim /* else - woops a session_id match */ 392280304Sjkim /* 393280304Sjkim * XXX We should also check the external cache -- but the probability of 394280304Sjkim * a collision is negligible, and we could not prevent the concurrent 395280304Sjkim * creation of sessions with identical IDs since we currently don't have 396280304Sjkim * means to atomically check whether a session ID already exists and make 397280304Sjkim * a reservation for it if it does not (this problem applies to the 398280304Sjkim * internal cache as well). 399280304Sjkim */ 400280304Sjkim return 0; 401109998Smarkm} 402109998Smarkm 40355714Skrisint ssl_get_new_session(SSL *s, int session) 404280304Sjkim{ 405280304Sjkim /* This gets used by clients and servers. */ 40655714Skris 407280304Sjkim unsigned int tmp; 408280304Sjkim SSL_SESSION *ss = NULL; 409280304Sjkim GEN_SESSION_CB cb = def_generate_session_id; 41055714Skris 411280304Sjkim if ((ss = SSL_SESSION_new()) == NULL) 412280304Sjkim return (0); 41355714Skris 414280304Sjkim /* If the context has a default timeout, use it */ 415280304Sjkim if (s->session_ctx->session_timeout == 0) 416280304Sjkim ss->timeout = SSL_get_default_timeout(s); 417280304Sjkim else 418280304Sjkim ss->timeout = s->session_ctx->session_timeout; 41955714Skris 420280304Sjkim if (s->session != NULL) { 421280304Sjkim SSL_SESSION_free(s->session); 422280304Sjkim s->session = NULL; 423280304Sjkim } 42455714Skris 425280304Sjkim if (session) { 426280304Sjkim if (s->version == SSL2_VERSION) { 427280304Sjkim ss->ssl_version = SSL2_VERSION; 428280304Sjkim ss->session_id_length = SSL2_SSL_SESSION_ID_LENGTH; 429280304Sjkim } else if (s->version == SSL3_VERSION) { 430280304Sjkim ss->ssl_version = SSL3_VERSION; 431280304Sjkim ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; 432280304Sjkim } else if (s->version == TLS1_VERSION) { 433280304Sjkim ss->ssl_version = TLS1_VERSION; 434280304Sjkim ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; 435280304Sjkim } else if (s->version == TLS1_1_VERSION) { 436280304Sjkim ss->ssl_version = TLS1_1_VERSION; 437280304Sjkim ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; 438280304Sjkim } else if (s->version == TLS1_2_VERSION) { 439280304Sjkim ss->ssl_version = TLS1_2_VERSION; 440280304Sjkim ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; 441280304Sjkim } else if (s->version == DTLS1_BAD_VER) { 442280304Sjkim ss->ssl_version = DTLS1_BAD_VER; 443280304Sjkim ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; 444280304Sjkim } else if (s->version == DTLS1_VERSION) { 445280304Sjkim ss->ssl_version = DTLS1_VERSION; 446280304Sjkim ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; 447280304Sjkim } else { 448280304Sjkim SSLerr(SSL_F_SSL_GET_NEW_SESSION, SSL_R_UNSUPPORTED_SSL_VERSION); 449280304Sjkim SSL_SESSION_free(ss); 450280304Sjkim return (0); 451280304Sjkim } 452194206Ssimon#ifndef OPENSSL_NO_TLSEXT 453280304Sjkim /*- 454280304Sjkim * If RFC5077 ticket, use empty session ID (as server). 455280304Sjkim * Note that: 456280304Sjkim * (a) ssl_get_prev_session() does lookahead into the 457280304Sjkim * ClientHello extensions to find the session ticket. 458280304Sjkim * When ssl_get_prev_session() fails, s3_srvr.c calls 459280304Sjkim * ssl_get_new_session() in ssl3_get_client_hello(). 460280304Sjkim * At that point, it has not yet parsed the extensions, 461280304Sjkim * however, because of the lookahead, it already knows 462280304Sjkim * whether a ticket is expected or not. 463280304Sjkim * 464280304Sjkim * (b) s3_clnt.c calls ssl_get_new_session() before parsing 465280304Sjkim * ServerHello extensions, and before recording the session 466280304Sjkim * ID received from the server, so this block is a noop. 467280304Sjkim */ 468280304Sjkim if (s->tlsext_ticket_expected) { 469280304Sjkim ss->session_id_length = 0; 470280304Sjkim goto sess_id_done; 471280304Sjkim } 472194206Ssimon#endif 473280304Sjkim /* Choose which callback will set the session ID */ 474280304Sjkim CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); 475280304Sjkim if (s->generate_session_id) 476280304Sjkim cb = s->generate_session_id; 477280304Sjkim else if (s->session_ctx->generate_session_id) 478280304Sjkim cb = s->session_ctx->generate_session_id; 479280304Sjkim CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); 480280304Sjkim /* Choose a session ID */ 481280304Sjkim tmp = ss->session_id_length; 482280304Sjkim if (!cb(s, ss->session_id, &tmp)) { 483280304Sjkim /* The callback failed */ 484280304Sjkim SSLerr(SSL_F_SSL_GET_NEW_SESSION, 485280304Sjkim SSL_R_SSL_SESSION_ID_CALLBACK_FAILED); 486280304Sjkim SSL_SESSION_free(ss); 487280304Sjkim return (0); 488280304Sjkim } 489280304Sjkim /* 490280304Sjkim * Don't allow the callback to set the session length to zero. nor 491280304Sjkim * set it higher than it was. 492280304Sjkim */ 493280304Sjkim if (!tmp || (tmp > ss->session_id_length)) { 494280304Sjkim /* The callback set an illegal length */ 495280304Sjkim SSLerr(SSL_F_SSL_GET_NEW_SESSION, 496280304Sjkim SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH); 497280304Sjkim SSL_SESSION_free(ss); 498280304Sjkim return (0); 499280304Sjkim } 500280304Sjkim /* If the session length was shrunk and we're SSLv2, pad it */ 501280304Sjkim if ((tmp < ss->session_id_length) && (s->version == SSL2_VERSION)) 502280304Sjkim memset(ss->session_id + tmp, 0, ss->session_id_length - tmp); 503280304Sjkim else 504280304Sjkim ss->session_id_length = tmp; 505280304Sjkim /* Finally, check for a conflict */ 506280304Sjkim if (SSL_has_matching_session_id(s, ss->session_id, 507280304Sjkim ss->session_id_length)) { 508280304Sjkim SSLerr(SSL_F_SSL_GET_NEW_SESSION, SSL_R_SSL_SESSION_ID_CONFLICT); 509280304Sjkim SSL_SESSION_free(ss); 510280304Sjkim return (0); 511280304Sjkim } 512194206Ssimon#ifndef OPENSSL_NO_TLSEXT 513280304Sjkim sess_id_done: 514280304Sjkim if (s->tlsext_hostname) { 515280304Sjkim ss->tlsext_hostname = BUF_strdup(s->tlsext_hostname); 516280304Sjkim if (ss->tlsext_hostname == NULL) { 517280304Sjkim SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR); 518280304Sjkim SSL_SESSION_free(ss); 519280304Sjkim return 0; 520280304Sjkim } 521280304Sjkim } 522280304Sjkim# ifndef OPENSSL_NO_EC 523280304Sjkim if (s->tlsext_ecpointformatlist) { 524280304Sjkim if (ss->tlsext_ecpointformatlist != NULL) 525280304Sjkim OPENSSL_free(ss->tlsext_ecpointformatlist); 526280304Sjkim if ((ss->tlsext_ecpointformatlist = 527280304Sjkim OPENSSL_malloc(s->tlsext_ecpointformatlist_length)) == 528280304Sjkim NULL) { 529280304Sjkim SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_MALLOC_FAILURE); 530280304Sjkim SSL_SESSION_free(ss); 531280304Sjkim return 0; 532280304Sjkim } 533280304Sjkim ss->tlsext_ecpointformatlist_length = 534280304Sjkim s->tlsext_ecpointformatlist_length; 535280304Sjkim memcpy(ss->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist, 536280304Sjkim s->tlsext_ecpointformatlist_length); 537280304Sjkim } 538280304Sjkim if (s->tlsext_ellipticcurvelist) { 539280304Sjkim if (ss->tlsext_ellipticcurvelist != NULL) 540280304Sjkim OPENSSL_free(ss->tlsext_ellipticcurvelist); 541280304Sjkim if ((ss->tlsext_ellipticcurvelist = 542280304Sjkim OPENSSL_malloc(s->tlsext_ellipticcurvelist_length)) == 543280304Sjkim NULL) { 544280304Sjkim SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_MALLOC_FAILURE); 545280304Sjkim SSL_SESSION_free(ss); 546280304Sjkim return 0; 547280304Sjkim } 548280304Sjkim ss->tlsext_ellipticcurvelist_length = 549280304Sjkim s->tlsext_ellipticcurvelist_length; 550280304Sjkim memcpy(ss->tlsext_ellipticcurvelist, s->tlsext_ellipticcurvelist, 551280304Sjkim s->tlsext_ellipticcurvelist_length); 552280304Sjkim } 553280304Sjkim# endif 554194206Ssimon#endif 555280304Sjkim } else { 556280304Sjkim ss->session_id_length = 0; 557280304Sjkim } 55855714Skris 559280304Sjkim if (s->sid_ctx_length > sizeof ss->sid_ctx) { 560280304Sjkim SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR); 561280304Sjkim SSL_SESSION_free(ss); 562280304Sjkim return 0; 563280304Sjkim } 564280304Sjkim memcpy(ss->sid_ctx, s->sid_ctx, s->sid_ctx_length); 565280304Sjkim ss->sid_ctx_length = s->sid_ctx_length; 566280304Sjkim s->session = ss; 567280304Sjkim ss->ssl_version = s->version; 568280304Sjkim ss->verify_result = X509_V_OK; 56955714Skris 570280304Sjkim return (1); 571280304Sjkim} 57255714Skris 573280304Sjkim/*- 574280304Sjkim * ssl_get_prev attempts to find an SSL_SESSION to be used to resume this 575238405Sjkim * connection. It is only called by servers. 576238405Sjkim * 577238405Sjkim * session_id: points at the session ID in the ClientHello. This code will 578238405Sjkim * read past the end of this in order to parse out the session ticket 579238405Sjkim * extension, if any. 580238405Sjkim * len: the length of the session ID. 581238405Sjkim * limit: a pointer to the first byte after the ClientHello. 582238405Sjkim * 583238405Sjkim * Returns: 584238405Sjkim * -1: error 585238405Sjkim * 0: a session may have been found. 586238405Sjkim * 587238405Sjkim * Side effects: 588238405Sjkim * - If a session is found then s->session is pointed at it (after freeing an 589238405Sjkim * existing session if need be) and s->verify_result is set from the session. 590238405Sjkim * - Both for new and resumed sessions, s->tlsext_ticket_expected is set to 1 591238405Sjkim * if the server should issue a new session ticket (to 0 otherwise). 592238405Sjkim */ 593194206Ssimonint ssl_get_prev_session(SSL *s, unsigned char *session_id, int len, 594280304Sjkim const unsigned char *limit) 595280304Sjkim{ 596280304Sjkim /* This is used only by servers. */ 59755714Skris 598280304Sjkim SSL_SESSION *ret = NULL; 599280304Sjkim int fatal = 0; 600280304Sjkim int try_session_cache = 1; 601194206Ssimon#ifndef OPENSSL_NO_TLSEXT 602280304Sjkim int r; 603194206Ssimon#endif 604238405Sjkim 605306196Sjkim if (limit - session_id < len) { 606284285Sjkim fatal = 1; 607284285Sjkim goto err; 608284285Sjkim } 609284285Sjkim 610280304Sjkim if (len == 0) 611280304Sjkim try_session_cache = 0; 612238405Sjkim 613194206Ssimon#ifndef OPENSSL_NO_TLSEXT 614280304Sjkim /* sets s->tlsext_ticket_expected */ 615280304Sjkim r = tls1_process_ticket(s, session_id, len, limit, &ret); 616280304Sjkim switch (r) { 617280304Sjkim case -1: /* Error during processing */ 618280304Sjkim fatal = 1; 619280304Sjkim goto err; 620280304Sjkim case 0: /* No ticket found */ 621280304Sjkim case 1: /* Zero length ticket found */ 622280304Sjkim break; /* Ok to carry on processing session id. */ 623280304Sjkim case 2: /* Ticket found but not decrypted. */ 624280304Sjkim case 3: /* Ticket decrypted, *ret has been set. */ 625280304Sjkim try_session_cache = 0; 626280304Sjkim break; 627280304Sjkim default: 628280304Sjkim abort(); 629280304Sjkim } 630194206Ssimon#endif 631238405Sjkim 632280304Sjkim if (try_session_cache && 633280304Sjkim ret == NULL && 634280304Sjkim !(s->session_ctx->session_cache_mode & 635280304Sjkim SSL_SESS_CACHE_NO_INTERNAL_LOOKUP)) { 636280304Sjkim SSL_SESSION data; 637280304Sjkim data.ssl_version = s->version; 638280304Sjkim data.session_id_length = len; 639280304Sjkim if (len == 0) 640280304Sjkim return 0; 641280304Sjkim memcpy(data.session_id, session_id, len); 642280304Sjkim CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); 643280304Sjkim ret = lh_SSL_SESSION_retrieve(s->session_ctx->sessions, &data); 644280304Sjkim if (ret != NULL) { 645280304Sjkim /* don't allow other threads to steal it: */ 646280304Sjkim CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_SSL_SESSION); 647280304Sjkim } 648280304Sjkim CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); 649280304Sjkim if (ret == NULL) 650280304Sjkim s->session_ctx->stats.sess_miss++; 651280304Sjkim } 65255714Skris 653280304Sjkim if (try_session_cache && 654280304Sjkim ret == NULL && s->session_ctx->get_session_cb != NULL) { 655280304Sjkim int copy = 1; 65655714Skris 657280304Sjkim if ((ret = s->session_ctx->get_session_cb(s, session_id, len, ©))) { 658280304Sjkim s->session_ctx->stats.sess_cb_hit++; 65955714Skris 660280304Sjkim /* 661280304Sjkim * Increment reference count now if the session callback asks us 662280304Sjkim * to do so (note that if the session structures returned by the 663280304Sjkim * callback are shared between threads, it must handle the 664280304Sjkim * reference count itself [i.e. copy == 0], or things won't be 665280304Sjkim * thread-safe). 666280304Sjkim */ 667280304Sjkim if (copy) 668280304Sjkim CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_SSL_SESSION); 66955714Skris 670280304Sjkim /* 671280304Sjkim * Add the externally cached session to the internal cache as 672280304Sjkim * well if and only if we are supposed to. 673280304Sjkim */ 674280304Sjkim if (! 675280304Sjkim (s->session_ctx->session_cache_mode & 676280304Sjkim SSL_SESS_CACHE_NO_INTERNAL_STORE)) 677280304Sjkim /* 678280304Sjkim * The following should not return 1, otherwise, things are 679280304Sjkim * very strange 680280304Sjkim */ 681280304Sjkim SSL_CTX_add_session(s->session_ctx, ret); 682280304Sjkim } 683280304Sjkim } 68455714Skris 685280304Sjkim if (ret == NULL) 686280304Sjkim goto err; 687238405Sjkim 688280304Sjkim /* Now ret is non-NULL and we own one of its reference counts. */ 68955714Skris 690280304Sjkim if (ret->sid_ctx_length != s->sid_ctx_length 691280304Sjkim || memcmp(ret->sid_ctx, s->sid_ctx, ret->sid_ctx_length)) { 692280304Sjkim /* 693280304Sjkim * We have the session requested by the client, but we don't want to 694280304Sjkim * use it in this context. 695280304Sjkim */ 696280304Sjkim goto err; /* treat like cache miss */ 697280304Sjkim } 69855714Skris 699280304Sjkim if ((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0) { 700280304Sjkim /* 701280304Sjkim * We can't be sure if this session is being used out of context, 702280304Sjkim * which is especially important for SSL_VERIFY_PEER. The application 703280304Sjkim * should have used SSL[_CTX]_set_session_id_context. For this error 704280304Sjkim * case, we generate an error instead of treating the event like a 705280304Sjkim * cache miss (otherwise it would be easy for applications to 706280304Sjkim * effectively disable the session cache by accident without anyone 707280304Sjkim * noticing). 708280304Sjkim */ 70955714Skris 710280304Sjkim SSLerr(SSL_F_SSL_GET_PREV_SESSION, 711280304Sjkim SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED); 712280304Sjkim fatal = 1; 713280304Sjkim goto err; 714280304Sjkim } 71555714Skris 716280304Sjkim if (ret->cipher == NULL) { 717280304Sjkim unsigned char buf[5], *p; 718280304Sjkim unsigned long l; 71955714Skris 720280304Sjkim p = buf; 721280304Sjkim l = ret->cipher_id; 722280304Sjkim l2n(l, p); 723280304Sjkim if ((ret->ssl_version >> 8) >= SSL3_VERSION_MAJOR) 724280304Sjkim ret->cipher = ssl_get_cipher_by_char(s, &(buf[2])); 725280304Sjkim else 726280304Sjkim ret->cipher = ssl_get_cipher_by_char(s, &(buf[1])); 727280304Sjkim if (ret->cipher == NULL) 728280304Sjkim goto err; 729280304Sjkim } 73055714Skris 731280304Sjkim if (ret->timeout < (long)(time(NULL) - ret->time)) { /* timeout */ 732280304Sjkim s->session_ctx->stats.sess_timeout++; 733280304Sjkim if (try_session_cache) { 734280304Sjkim /* session was from the cache, so remove it */ 735280304Sjkim SSL_CTX_remove_session(s->session_ctx, ret); 736280304Sjkim } 737280304Sjkim goto err; 738280304Sjkim } 739280304Sjkim 740280304Sjkim s->session_ctx->stats.sess_hit++; 741280304Sjkim 742280304Sjkim if (s->session != NULL) 743280304Sjkim SSL_SESSION_free(s->session); 744280304Sjkim s->session = ret; 745280304Sjkim s->verify_result = s->session->verify_result; 746280304Sjkim return 1; 747280304Sjkim 74855714Skris err: 749280304Sjkim if (ret != NULL) { 750280304Sjkim SSL_SESSION_free(ret); 751238405Sjkim#ifndef OPENSSL_NO_TLSEXT 752280304Sjkim if (!try_session_cache) { 753280304Sjkim /* 754280304Sjkim * The session was from a ticket, so we should issue a ticket for 755280304Sjkim * the new session 756280304Sjkim */ 757280304Sjkim s->tlsext_ticket_expected = 1; 758280304Sjkim } 759238405Sjkim#endif 760280304Sjkim } 761280304Sjkim if (fatal) 762280304Sjkim return -1; 763280304Sjkim else 764280304Sjkim return 0; 765280304Sjkim} 76655714Skris 76755714Skrisint SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c) 768280304Sjkim{ 769280304Sjkim int ret = 0; 770280304Sjkim SSL_SESSION *s; 77155714Skris 772280304Sjkim /* 773280304Sjkim * add just 1 reference count for the SSL_CTX's session cache even though 774280304Sjkim * it has two ways of access: each session is in a doubly linked list and 775280304Sjkim * an lhash 776280304Sjkim */ 777280304Sjkim CRYPTO_add(&c->references, 1, CRYPTO_LOCK_SSL_SESSION); 778280304Sjkim /* 779280304Sjkim * if session c is in already in cache, we take back the increment later 780280304Sjkim */ 78155714Skris 782280304Sjkim CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 783280304Sjkim s = lh_SSL_SESSION_insert(ctx->sessions, c); 78459191Skris 785280304Sjkim /* 786280304Sjkim * s != NULL iff we already had a session with the given PID. In this 787280304Sjkim * case, s == c should hold (then we did not really modify 788280304Sjkim * ctx->sessions), or we're in trouble. 789280304Sjkim */ 790280304Sjkim if (s != NULL && s != c) { 791280304Sjkim /* We *are* in trouble ... */ 792280304Sjkim SSL_SESSION_list_remove(ctx, s); 793280304Sjkim SSL_SESSION_free(s); 794280304Sjkim /* 795280304Sjkim * ... so pretend the other session did not exist in cache (we cannot 796280304Sjkim * handle two SSL_SESSION structures with identical session ID in the 797280304Sjkim * same cache, which could happen e.g. when two threads concurrently 798280304Sjkim * obtain the same session from an external cache) 799280304Sjkim */ 800280304Sjkim s = NULL; 801280304Sjkim } 80255714Skris 803280304Sjkim /* Put at the head of the queue unless it is already in the cache */ 804280304Sjkim if (s == NULL) 805280304Sjkim SSL_SESSION_list_add(ctx, c); 80659191Skris 807280304Sjkim if (s != NULL) { 808280304Sjkim /* 809280304Sjkim * existing cache entry -- decrement previously incremented reference 810280304Sjkim * count because it already takes into account the cache 811280304Sjkim */ 81255714Skris 813280304Sjkim SSL_SESSION_free(s); /* s == c */ 814280304Sjkim ret = 0; 815280304Sjkim } else { 816280304Sjkim /* 817280304Sjkim * new cache entry -- remove old ones if cache has become too large 818280304Sjkim */ 81955714Skris 820280304Sjkim ret = 1; 821280304Sjkim 822280304Sjkim if (SSL_CTX_sess_get_cache_size(ctx) > 0) { 823280304Sjkim while (SSL_CTX_sess_number(ctx) > 824280304Sjkim SSL_CTX_sess_get_cache_size(ctx)) { 825280304Sjkim if (!remove_session_lock(ctx, ctx->session_cache_tail, 0)) 826280304Sjkim break; 827280304Sjkim else 828280304Sjkim ctx->stats.sess_cache_full++; 829280304Sjkim } 830280304Sjkim } 831280304Sjkim } 832280304Sjkim CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 833280304Sjkim return (ret); 834280304Sjkim} 835280304Sjkim 83655714Skrisint SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c) 83755714Skris{ 838280304Sjkim return remove_session_lock(ctx, c, 1); 83955714Skris} 84055714Skris 84155714Skrisstatic int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck) 842280304Sjkim{ 843280304Sjkim SSL_SESSION *r; 844280304Sjkim int ret = 0; 84555714Skris 846280304Sjkim if ((c != NULL) && (c->session_id_length != 0)) { 847280304Sjkim if (lck) 848280304Sjkim CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 849280304Sjkim if ((r = lh_SSL_SESSION_retrieve(ctx->sessions, c)) == c) { 850280304Sjkim ret = 1; 851280304Sjkim r = lh_SSL_SESSION_delete(ctx->sessions, c); 852280304Sjkim SSL_SESSION_list_remove(ctx, c); 853280304Sjkim } 85455714Skris 855280304Sjkim if (lck) 856280304Sjkim CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 85755714Skris 858280304Sjkim if (ret) { 859280304Sjkim r->not_resumable = 1; 860280304Sjkim if (ctx->remove_session_cb != NULL) 861280304Sjkim ctx->remove_session_cb(ctx, r); 862280304Sjkim SSL_SESSION_free(r); 863280304Sjkim } 864280304Sjkim } else 865280304Sjkim ret = 0; 866280304Sjkim return (ret); 867280304Sjkim} 86855714Skris 86955714Skrisvoid SSL_SESSION_free(SSL_SESSION *ss) 870280304Sjkim{ 871280304Sjkim int i; 87255714Skris 873280304Sjkim if (ss == NULL) 874280304Sjkim return; 87555714Skris 876280304Sjkim i = CRYPTO_add(&ss->references, -1, CRYPTO_LOCK_SSL_SESSION); 87755714Skris#ifdef REF_PRINT 878280304Sjkim REF_PRINT("SSL_SESSION", ss); 87955714Skris#endif 880280304Sjkim if (i > 0) 881280304Sjkim return; 88255714Skris#ifdef REF_CHECK 883280304Sjkim if (i < 0) { 884280304Sjkim fprintf(stderr, "SSL_SESSION_free, bad reference count\n"); 885280304Sjkim abort(); /* ok */ 886280304Sjkim } 88755714Skris#endif 88855714Skris 889280304Sjkim CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data); 89055714Skris 891280304Sjkim OPENSSL_cleanse(ss->key_arg, sizeof ss->key_arg); 892280304Sjkim OPENSSL_cleanse(ss->master_key, sizeof ss->master_key); 893280304Sjkim OPENSSL_cleanse(ss->session_id, sizeof ss->session_id); 894280304Sjkim if (ss->sess_cert != NULL) 895280304Sjkim ssl_sess_cert_free(ss->sess_cert); 896280304Sjkim if (ss->peer != NULL) 897280304Sjkim X509_free(ss->peer); 898280304Sjkim if (ss->ciphers != NULL) 899280304Sjkim sk_SSL_CIPHER_free(ss->ciphers); 900194206Ssimon#ifndef OPENSSL_NO_TLSEXT 901280304Sjkim if (ss->tlsext_hostname != NULL) 902280304Sjkim OPENSSL_free(ss->tlsext_hostname); 903280304Sjkim if (ss->tlsext_tick != NULL) 904280304Sjkim OPENSSL_free(ss->tlsext_tick); 905280304Sjkim# ifndef OPENSSL_NO_EC 906280304Sjkim ss->tlsext_ecpointformatlist_length = 0; 907280304Sjkim if (ss->tlsext_ecpointformatlist != NULL) 908280304Sjkim OPENSSL_free(ss->tlsext_ecpointformatlist); 909280304Sjkim ss->tlsext_ellipticcurvelist_length = 0; 910280304Sjkim if (ss->tlsext_ellipticcurvelist != NULL) 911280304Sjkim OPENSSL_free(ss->tlsext_ellipticcurvelist); 912280304Sjkim# endif /* OPENSSL_NO_EC */ 913194206Ssimon#endif 914238405Sjkim#ifndef OPENSSL_NO_PSK 915280304Sjkim if (ss->psk_identity_hint != NULL) 916280304Sjkim OPENSSL_free(ss->psk_identity_hint); 917280304Sjkim if (ss->psk_identity != NULL) 918280304Sjkim OPENSSL_free(ss->psk_identity); 919238405Sjkim#endif 920238405Sjkim#ifndef OPENSSL_NO_SRP 921280304Sjkim if (ss->srp_username != NULL) 922280304Sjkim OPENSSL_free(ss->srp_username); 923238405Sjkim#endif 924280304Sjkim OPENSSL_cleanse(ss, sizeof(*ss)); 925280304Sjkim OPENSSL_free(ss); 926280304Sjkim} 92755714Skris 92855714Skrisint SSL_set_session(SSL *s, SSL_SESSION *session) 929280304Sjkim{ 930280304Sjkim int ret = 0; 931280304Sjkim const SSL_METHOD *meth; 93255714Skris 933280304Sjkim if (session != NULL) { 934280304Sjkim meth = s->ctx->method->get_ssl_method(session->ssl_version); 935280304Sjkim if (meth == NULL) 936280304Sjkim meth = s->method->get_ssl_method(session->ssl_version); 937280304Sjkim if (meth == NULL) { 938280304Sjkim SSLerr(SSL_F_SSL_SET_SESSION, SSL_R_UNABLE_TO_FIND_SSL_METHOD); 939280304Sjkim return (0); 940280304Sjkim } 94155714Skris 942280304Sjkim if (meth != s->method) { 943280304Sjkim if (!SSL_set_ssl_method(s, meth)) 944280304Sjkim return (0); 945280304Sjkim } 946109998Smarkm#ifndef OPENSSL_NO_KRB5 947280304Sjkim if (s->kssl_ctx && !s->kssl_ctx->client_princ && 948280304Sjkim session->krb5_client_princ_len > 0) { 949280304Sjkim s->kssl_ctx->client_princ = 950280304Sjkim (char *)OPENSSL_malloc(session->krb5_client_princ_len + 1); 951280304Sjkim memcpy(s->kssl_ctx->client_princ, session->krb5_client_princ, 952280304Sjkim session->krb5_client_princ_len); 953280304Sjkim s->kssl_ctx->client_princ[session->krb5_client_princ_len] = '\0'; 954280304Sjkim } 955280304Sjkim#endif /* OPENSSL_NO_KRB5 */ 956109998Smarkm 957280304Sjkim /* CRYPTO_w_lock(CRYPTO_LOCK_SSL); */ 958280304Sjkim CRYPTO_add(&session->references, 1, CRYPTO_LOCK_SSL_SESSION); 959280304Sjkim if (s->session != NULL) 960280304Sjkim SSL_SESSION_free(s->session); 961280304Sjkim s->session = session; 962280304Sjkim s->verify_result = s->session->verify_result; 963280304Sjkim /* CRYPTO_w_unlock(CRYPTO_LOCK_SSL); */ 964280304Sjkim ret = 1; 965280304Sjkim } else { 966280304Sjkim if (s->session != NULL) { 967280304Sjkim SSL_SESSION_free(s->session); 968280304Sjkim s->session = NULL; 969280304Sjkim } 97055714Skris 971280304Sjkim meth = s->ctx->method; 972280304Sjkim if (meth != s->method) { 973280304Sjkim if (!SSL_set_ssl_method(s, meth)) 974280304Sjkim return (0); 975280304Sjkim } 976280304Sjkim ret = 1; 977280304Sjkim } 978280304Sjkim return (ret); 979280304Sjkim} 98055714Skris 98155714Skrislong SSL_SESSION_set_timeout(SSL_SESSION *s, long t) 982280304Sjkim{ 983280304Sjkim if (s == NULL) 984280304Sjkim return (0); 985280304Sjkim s->timeout = t; 986280304Sjkim return (1); 987280304Sjkim} 98855714Skris 989160814Ssimonlong SSL_SESSION_get_timeout(const SSL_SESSION *s) 990280304Sjkim{ 991280304Sjkim if (s == NULL) 992280304Sjkim return (0); 993280304Sjkim return (s->timeout); 994280304Sjkim} 99555714Skris 996160814Ssimonlong SSL_SESSION_get_time(const SSL_SESSION *s) 997280304Sjkim{ 998280304Sjkim if (s == NULL) 999280304Sjkim return (0); 1000280304Sjkim return (s->time); 1001280304Sjkim} 100255714Skris 100355714Skrislong SSL_SESSION_set_time(SSL_SESSION *s, long t) 1004280304Sjkim{ 1005280304Sjkim if (s == NULL) 1006280304Sjkim return (0); 1007280304Sjkim s->time = t; 1008280304Sjkim return (t); 1009280304Sjkim} 101055714Skris 1011238405SjkimX509 *SSL_SESSION_get0_peer(SSL_SESSION *s) 1012280304Sjkim{ 1013280304Sjkim return s->peer; 1014280304Sjkim} 1015238405Sjkim 1016280304Sjkimint SSL_SESSION_set1_id_context(SSL_SESSION *s, const unsigned char *sid_ctx, 1017280304Sjkim unsigned int sid_ctx_len) 1018280304Sjkim{ 1019280304Sjkim if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { 1020280304Sjkim SSLerr(SSL_F_SSL_SESSION_SET1_ID_CONTEXT, 1021280304Sjkim SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); 1022280304Sjkim return 0; 1023280304Sjkim } 1024280304Sjkim s->sid_ctx_length = sid_ctx_len; 1025280304Sjkim memcpy(s->sid_ctx, sid_ctx, sid_ctx_len); 1026238405Sjkim 1027280304Sjkim return 1; 1028280304Sjkim} 1029238405Sjkim 103055714Skrislong SSL_CTX_set_timeout(SSL_CTX *s, long t) 1031280304Sjkim{ 1032280304Sjkim long l; 1033280304Sjkim if (s == NULL) 1034280304Sjkim return (0); 1035280304Sjkim l = s->session_timeout; 1036280304Sjkim s->session_timeout = t; 1037280304Sjkim return (l); 1038280304Sjkim} 103955714Skris 1040160814Ssimonlong SSL_CTX_get_timeout(const SSL_CTX *s) 1041280304Sjkim{ 1042280304Sjkim if (s == NULL) 1043280304Sjkim return (0); 1044280304Sjkim return (s->session_timeout); 1045280304Sjkim} 104655714Skris 1047238405Sjkim#ifndef OPENSSL_NO_TLSEXT 1048280304Sjkimint SSL_set_session_secret_cb(SSL *s, 1049280304Sjkim int (*tls_session_secret_cb) (SSL *s, 1050280304Sjkim void *secret, 1051280304Sjkim int *secret_len, 1052280304Sjkim STACK_OF(SSL_CIPHER) 1053280304Sjkim *peer_ciphers, 1054280304Sjkim SSL_CIPHER 1055280304Sjkim **cipher, 1056280304Sjkim void *arg), 1057280304Sjkim void *arg) 1058280304Sjkim{ 1059280304Sjkim if (s == NULL) 1060280304Sjkim return (0); 1061280304Sjkim s->tls_session_secret_cb = tls_session_secret_cb; 1062280304Sjkim s->tls_session_secret_cb_arg = arg; 1063280304Sjkim return (1); 1064280304Sjkim} 1065238405Sjkim 1066238405Sjkimint SSL_set_session_ticket_ext_cb(SSL *s, tls_session_ticket_ext_cb_fn cb, 1067280304Sjkim void *arg) 1068280304Sjkim{ 1069280304Sjkim if (s == NULL) 1070280304Sjkim return (0); 1071280304Sjkim s->tls_session_ticket_ext_cb = cb; 1072280304Sjkim s->tls_session_ticket_ext_cb_arg = arg; 1073280304Sjkim return (1); 1074280304Sjkim} 1075238405Sjkim 1076238405Sjkimint SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len) 1077280304Sjkim{ 1078280304Sjkim if (s->version >= TLS1_VERSION) { 1079280304Sjkim if (s->tlsext_session_ticket) { 1080280304Sjkim OPENSSL_free(s->tlsext_session_ticket); 1081280304Sjkim s->tlsext_session_ticket = NULL; 1082280304Sjkim } 1083238405Sjkim 1084280304Sjkim s->tlsext_session_ticket = 1085280304Sjkim OPENSSL_malloc(sizeof(TLS_SESSION_TICKET_EXT) + ext_len); 1086280304Sjkim if (!s->tlsext_session_ticket) { 1087280304Sjkim SSLerr(SSL_F_SSL_SET_SESSION_TICKET_EXT, ERR_R_MALLOC_FAILURE); 1088280304Sjkim return 0; 1089280304Sjkim } 1090238405Sjkim 1091280304Sjkim if (ext_data) { 1092280304Sjkim s->tlsext_session_ticket->length = ext_len; 1093280304Sjkim s->tlsext_session_ticket->data = s->tlsext_session_ticket + 1; 1094280304Sjkim memcpy(s->tlsext_session_ticket->data, ext_data, ext_len); 1095280304Sjkim } else { 1096280304Sjkim s->tlsext_session_ticket->length = 0; 1097280304Sjkim s->tlsext_session_ticket->data = NULL; 1098280304Sjkim } 1099238405Sjkim 1100280304Sjkim return 1; 1101280304Sjkim } 1102238405Sjkim 1103280304Sjkim return 0; 1104280304Sjkim} 1105280304Sjkim#endif /* OPENSSL_NO_TLSEXT */ 1106238405Sjkim 1107280304Sjkimtypedef struct timeout_param_st { 1108280304Sjkim SSL_CTX *ctx; 1109280304Sjkim long time; 1110280304Sjkim LHASH_OF(SSL_SESSION) *cache; 1111280304Sjkim} TIMEOUT_PARAM; 111255714Skris 1113238405Sjkimstatic void timeout_doall_arg(SSL_SESSION *s, TIMEOUT_PARAM *p) 1114280304Sjkim{ 1115280304Sjkim if ((p->time == 0) || (p->time > (s->time + s->timeout))) { /* timeout */ 1116280304Sjkim /* 1117280304Sjkim * The reason we don't call SSL_CTX_remove_session() is to save on 1118280304Sjkim * locking overhead 1119280304Sjkim */ 1120280304Sjkim (void)lh_SSL_SESSION_delete(p->cache, s); 1121280304Sjkim SSL_SESSION_list_remove(p->ctx, s); 1122280304Sjkim s->not_resumable = 1; 1123280304Sjkim if (p->ctx->remove_session_cb != NULL) 1124280304Sjkim p->ctx->remove_session_cb(p->ctx, s); 1125280304Sjkim SSL_SESSION_free(s); 1126280304Sjkim } 1127280304Sjkim} 112855714Skris 1129238405Sjkimstatic IMPLEMENT_LHASH_DOALL_ARG_FN(timeout, SSL_SESSION, TIMEOUT_PARAM) 1130109998Smarkm 113155714Skrisvoid SSL_CTX_flush_sessions(SSL_CTX *s, long t) 1132280304Sjkim{ 1133280304Sjkim unsigned long i; 1134280304Sjkim TIMEOUT_PARAM tp; 113555714Skris 1136280304Sjkim tp.ctx = s; 1137280304Sjkim tp.cache = s->sessions; 1138280304Sjkim if (tp.cache == NULL) 1139280304Sjkim return; 1140280304Sjkim tp.time = t; 1141280304Sjkim CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 1142280304Sjkim i = CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load; 1143280304Sjkim CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load = 0; 1144280304Sjkim lh_SSL_SESSION_doall_arg(tp.cache, LHASH_DOALL_ARG_FN(timeout), 1145280304Sjkim TIMEOUT_PARAM, &tp); 1146280304Sjkim CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load = i; 1147280304Sjkim CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 1148280304Sjkim} 114955714Skris 115055714Skrisint ssl_clear_bad_session(SSL *s) 1151280304Sjkim{ 1152280304Sjkim if ((s->session != NULL) && 1153280304Sjkim !(s->shutdown & SSL_SENT_SHUTDOWN) && 1154280304Sjkim !(SSL_in_init(s) || SSL_in_before(s))) { 1155280304Sjkim SSL_CTX_remove_session(s->ctx, s->session); 1156280304Sjkim return (1); 1157280304Sjkim } else 1158280304Sjkim return (0); 1159280304Sjkim} 116055714Skris 116155714Skris/* locked by SSL_CTX in the calling function */ 116255714Skrisstatic void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s) 1163280304Sjkim{ 1164280304Sjkim if ((s->next == NULL) || (s->prev == NULL)) 1165280304Sjkim return; 116655714Skris 1167280304Sjkim if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail)) { 1168280304Sjkim /* last element in list */ 1169280304Sjkim if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { 1170280304Sjkim /* only one element in list */ 1171280304Sjkim ctx->session_cache_head = NULL; 1172280304Sjkim ctx->session_cache_tail = NULL; 1173280304Sjkim } else { 1174280304Sjkim ctx->session_cache_tail = s->prev; 1175280304Sjkim s->prev->next = (SSL_SESSION *)&(ctx->session_cache_tail); 1176280304Sjkim } 1177280304Sjkim } else { 1178280304Sjkim if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { 1179280304Sjkim /* first element in list */ 1180280304Sjkim ctx->session_cache_head = s->next; 1181280304Sjkim s->next->prev = (SSL_SESSION *)&(ctx->session_cache_head); 1182280304Sjkim } else { 1183280304Sjkim /* middle of list */ 1184280304Sjkim s->next->prev = s->prev; 1185280304Sjkim s->prev->next = s->next; 1186280304Sjkim } 1187280304Sjkim } 1188280304Sjkim s->prev = s->next = NULL; 1189280304Sjkim} 119055714Skris 119155714Skrisstatic void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s) 1192280304Sjkim{ 1193280304Sjkim if ((s->next != NULL) && (s->prev != NULL)) 1194280304Sjkim SSL_SESSION_list_remove(ctx, s); 119555714Skris 1196280304Sjkim if (ctx->session_cache_head == NULL) { 1197280304Sjkim ctx->session_cache_head = s; 1198280304Sjkim ctx->session_cache_tail = s; 1199280304Sjkim s->prev = (SSL_SESSION *)&(ctx->session_cache_head); 1200280304Sjkim s->next = (SSL_SESSION *)&(ctx->session_cache_tail); 1201280304Sjkim } else { 1202280304Sjkim s->next = ctx->session_cache_head; 1203280304Sjkim s->next->prev = s; 1204280304Sjkim s->prev = (SSL_SESSION *)&(ctx->session_cache_head); 1205280304Sjkim ctx->session_cache_head = s; 1206280304Sjkim } 1207280304Sjkim} 120855714Skris 1209167612Ssimonvoid SSL_CTX_sess_set_new_cb(SSL_CTX *ctx, 1210280304Sjkim int (*cb) (struct ssl_st *ssl, 1211280304Sjkim SSL_SESSION *sess)) 1212280304Sjkim{ 1213280304Sjkim ctx->new_session_cb = cb; 1214280304Sjkim} 1215167612Ssimon 1216280304Sjkimint (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx)) (SSL *ssl, SSL_SESSION *sess) { 1217280304Sjkim return ctx->new_session_cb; 1218280304Sjkim} 1219167612Ssimon 1220167612Ssimonvoid SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx, 1221280304Sjkim void (*cb) (SSL_CTX *ctx, SSL_SESSION *sess)) 1222280304Sjkim{ 1223280304Sjkim ctx->remove_session_cb = cb; 1224280304Sjkim} 1225167612Ssimon 1226280304Sjkimvoid (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx)) (SSL_CTX *ctx, 1227280304Sjkim SSL_SESSION *sess) { 1228280304Sjkim return ctx->remove_session_cb; 1229280304Sjkim} 1230167612Ssimon 1231167612Ssimonvoid SSL_CTX_sess_set_get_cb(SSL_CTX *ctx, 1232280304Sjkim SSL_SESSION *(*cb) (struct ssl_st *ssl, 1233280304Sjkim unsigned char *data, int len, 1234280304Sjkim int *copy)) 1235280304Sjkim{ 1236280304Sjkim ctx->get_session_cb = cb; 1237280304Sjkim} 1238167612Ssimon 1239280304SjkimSSL_SESSION *(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx)) (SSL *ssl, 1240280304Sjkim unsigned char *data, 1241280304Sjkim int len, int *copy) { 1242280304Sjkim return ctx->get_session_cb; 1243280304Sjkim} 1244167612Ssimon 1245280304Sjkimvoid SSL_CTX_set_info_callback(SSL_CTX *ctx, 1246280304Sjkim void (*cb) (const SSL *ssl, int type, int val)) 1247280304Sjkim{ 1248280304Sjkim ctx->info_callback = cb; 1249280304Sjkim} 1250167612Ssimon 1251280304Sjkimvoid (*SSL_CTX_get_info_callback(SSL_CTX *ctx)) (const SSL *ssl, int type, 1252280304Sjkim int val) { 1253280304Sjkim return ctx->info_callback; 1254280304Sjkim} 1255167612Ssimon 1256167612Ssimonvoid SSL_CTX_set_client_cert_cb(SSL_CTX *ctx, 1257280304Sjkim int (*cb) (SSL *ssl, X509 **x509, 1258280304Sjkim EVP_PKEY **pkey)) 1259280304Sjkim{ 1260280304Sjkim ctx->client_cert_cb = cb; 1261280304Sjkim} 1262167612Ssimon 1263280304Sjkimint (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx)) (SSL *ssl, X509 **x509, 1264280304Sjkim EVP_PKEY **pkey) { 1265280304Sjkim return ctx->client_cert_cb; 1266280304Sjkim} 1267167612Ssimon 1268194206Ssimon#ifndef OPENSSL_NO_ENGINE 1269194206Ssimonint SSL_CTX_set_client_cert_engine(SSL_CTX *ctx, ENGINE *e) 1270280304Sjkim{ 1271280304Sjkim if (!ENGINE_init(e)) { 1272280304Sjkim SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, ERR_R_ENGINE_LIB); 1273280304Sjkim return 0; 1274280304Sjkim } 1275280304Sjkim if (!ENGINE_get_ssl_client_cert_function(e)) { 1276280304Sjkim SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, 1277280304Sjkim SSL_R_NO_CLIENT_CERT_METHOD); 1278280304Sjkim ENGINE_finish(e); 1279280304Sjkim return 0; 1280280304Sjkim } 1281280304Sjkim ctx->client_cert_engine = e; 1282280304Sjkim return 1; 1283280304Sjkim} 1284194206Ssimon#endif 1285194206Ssimon 1286167612Ssimonvoid SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx, 1287280304Sjkim int (*cb) (SSL *ssl, 1288280304Sjkim unsigned char *cookie, 1289280304Sjkim unsigned int *cookie_len)) 1290280304Sjkim{ 1291280304Sjkim ctx->app_gen_cookie_cb = cb; 1292280304Sjkim} 1293167612Ssimon 1294167612Ssimonvoid SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx, 1295280304Sjkim int (*cb) (SSL *ssl, unsigned char *cookie, 1296280304Sjkim unsigned int cookie_len)) 1297280304Sjkim{ 1298280304Sjkim ctx->app_verify_cookie_cb = cb; 1299280304Sjkim} 1300167612Ssimon 1301280304SjkimIMPLEMENT_PEM_rw(SSL_SESSION, SSL_SESSION, PEM_STRING_SSL_SESSION, 1302280304Sjkim SSL_SESSION) 1303