/* $OpenBSD: ssl_sess.c,v 1.80 2018/04/25 07:10:39 tb Exp $ */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ /* ==================================================================== * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. All advertising materials mentioning features or use of this * software must display the following acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" * * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to * endorse or promote products derived from this software without * prior written permission. For written permission, please contact * openssl-core@openssl.org. * * 5. Products derived from this software may not be called "OpenSSL" * nor may "OpenSSL" appear in their names without prior written * permission of the OpenSSL Project. * * 6. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit (http://www.openssl.org/)" * * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * ==================================================================== * * This product includes cryptographic software written by Eric Young * (eay@cryptsoft.com). This product includes software written by Tim * Hudson (tjh@cryptsoft.com). * */ /* ==================================================================== * Copyright 2005 Nokia. All rights reserved. * * The portions of the attached software ("Contribution") is developed by * Nokia Corporation and is licensed pursuant to the OpenSSL open source * license. * * The Contribution, originally written by Mika Kousa and Pasi Eronen of * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites * support (see RFC 4279) to OpenSSL. * * No patent licenses or other rights except those expressly stated in * the OpenSSL open source license shall be deemed granted or received * expressly, by implication, estoppel, or otherwise. * * No assurances are provided by Nokia that the Contribution does not * infringe the patent or other intellectual property rights of any third * party or that the license provides you with all the necessary rights * to make use of the Contribution. * * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR * OTHERWISE. */ #include #ifndef OPENSSL_NO_ENGINE #include #endif #include "ssl_locl.h" static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s); static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s); static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck); /* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */ SSL_SESSION * SSL_get_session(const SSL *ssl) { return (ssl->session); } /* variant of SSL_get_session: caller really gets something */ SSL_SESSION * SSL_get1_session(SSL *ssl) { SSL_SESSION *sess; /* * Need to lock this all up rather than just use CRYPTO_add so that * somebody doesn't free ssl->session between when we check it's * non-null and when we up the reference count. */ CRYPTO_w_lock(CRYPTO_LOCK_SSL_SESSION); sess = ssl->session; if (sess) sess->references++; CRYPTO_w_unlock(CRYPTO_LOCK_SSL_SESSION); return (sess); } int SSL_SESSION_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) { return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_SESSION, argl, argp, new_func, dup_func, free_func); } int SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg) { return (CRYPTO_set_ex_data(&s->internal->ex_data, idx, arg)); } void * SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx) { return (CRYPTO_get_ex_data(&s->internal->ex_data, idx)); } SSL_SESSION * SSL_SESSION_new(void) { SSL_SESSION *ss; if (!OPENSSL_init_ssl(0, NULL)) { SSLerrorx(SSL_R_LIBRARY_BUG); return(NULL); } if ((ss = calloc(1, sizeof(*ss))) == NULL) { SSLerrorx(ERR_R_MALLOC_FAILURE); return (NULL); } if ((ss->internal = calloc(1, sizeof(*ss->internal))) == NULL) { free(ss); SSLerrorx(ERR_R_MALLOC_FAILURE); return (NULL); } ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */ ss->references = 1; ss->timeout=60*5+4; /* 5 minute timeout by default */ ss->time = time(NULL); ss->internal->prev = NULL; ss->internal->next = NULL; ss->tlsext_hostname = NULL; ss->internal->tlsext_ecpointformatlist_length = 0; ss->internal->tlsext_ecpointformatlist = NULL; ss->internal->tlsext_supportedgroups_length = 0; ss->internal->tlsext_supportedgroups = NULL; CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->internal->ex_data); return (ss); } const unsigned char * SSL_SESSION_get_id(const SSL_SESSION *ss, unsigned int *len) { if (len != NULL) *len = ss->session_id_length; return ss->session_id; } const unsigned char * SSL_SESSION_get0_id_context(const SSL_SESSION *ss, unsigned int *len) { if (len != NULL) *len = (unsigned int)ss->sid_ctx_length; return ss->sid_ctx; } unsigned int SSL_SESSION_get_compress_id(const SSL_SESSION *ss) { return 0; } unsigned long SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION *s) { return s->tlsext_tick_lifetime_hint; } int SSL_SESSION_has_ticket(const SSL_SESSION *s) { return (s->tlsext_ticklen > 0) ? 1 : 0; } /* * SSLv3/TLSv1 has 32 bytes (256 bits) of session ID space. As such, filling * the ID with random gunk repeatedly until we have no conflict is going to * complete in one iteration pretty much "most" of the time (btw: * understatement). So, if it takes us 10 iterations and we still can't avoid * a conflict - well that's a reasonable point to call it quits. Either the * arc4random code is broken or someone is trying to open roughly very close to * 2^128 (or 2^256) SSL sessions to our server. How you might store that many * sessions is perhaps a more interesting question... */ #define MAX_SESS_ID_ATTEMPTS 10 static int def_generate_session_id(const SSL *ssl, unsigned char *id, unsigned int *id_len) { unsigned int retry = 0; do { arc4random_buf(id, *id_len); } while (SSL_has_matching_session_id(ssl, id, *id_len) && (++retry < MAX_SESS_ID_ATTEMPTS)); if (retry < MAX_SESS_ID_ATTEMPTS) return 1; /* else - woops a session_id match */ /* XXX We should also check the external cache -- * but the probability of a collision is negligible, and * we could not prevent the concurrent creation of sessions * with identical IDs since we currently don't have means * to atomically check whether a session ID already exists * and make a reservation for it if it does not * (this problem applies to the internal cache as well). */ return 0; } int ssl_get_new_session(SSL *s, int session) { unsigned int tmp; SSL_SESSION *ss = NULL; GEN_SESSION_CB cb = def_generate_session_id; /* This gets used by clients and servers. */ if ((ss = SSL_SESSION_new()) == NULL) return (0); /* If the context has a default timeout, use it */ if (s->session_ctx->session_timeout == 0) ss->timeout = SSL_get_default_timeout(s); else ss->timeout = s->session_ctx->session_timeout; if (s->session != NULL) { SSL_SESSION_free(s->session); s->session = NULL; } if (session) { switch (s->version) { case TLS1_VERSION: case TLS1_1_VERSION: case TLS1_2_VERSION: case DTLS1_VERSION: ss->ssl_version = s->version; ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; break; default: SSLerror(s, SSL_R_UNSUPPORTED_SSL_VERSION); SSL_SESSION_free(ss); return (0); } /* If RFC4507 ticket use empty session ID. */ if (s->internal->tlsext_ticket_expected) { ss->session_id_length = 0; goto sess_id_done; } /* Choose which callback will set the session ID. */ CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); if (s->internal->generate_session_id) cb = s->internal->generate_session_id; else if (s->session_ctx->internal->generate_session_id) cb = s->session_ctx->internal->generate_session_id; CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); /* Choose a session ID. */ tmp = ss->session_id_length; if (!cb(s, ss->session_id, &tmp)) { /* The callback failed */ SSLerror(s, SSL_R_SSL_SESSION_ID_CALLBACK_FAILED); SSL_SESSION_free(ss); return (0); } /* * Don't allow the callback to set the session length to zero. * nor set it higher than it was. */ if (!tmp || (tmp > ss->session_id_length)) { /* The callback set an illegal length */ SSLerror(s, SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH); SSL_SESSION_free(ss); return (0); } ss->session_id_length = tmp; /* Finally, check for a conflict. */ if (SSL_has_matching_session_id(s, ss->session_id, ss->session_id_length)) { SSLerror(s, SSL_R_SSL_SESSION_ID_CONFLICT); SSL_SESSION_free(ss); return (0); } sess_id_done: if (s->tlsext_hostname) { ss->tlsext_hostname = strdup(s->tlsext_hostname); if (ss->tlsext_hostname == NULL) { SSLerror(s, ERR_R_INTERNAL_ERROR); SSL_SESSION_free(ss); return 0; } } } else { ss->session_id_length = 0; } if (s->sid_ctx_length > sizeof ss->sid_ctx) { SSLerror(s, ERR_R_INTERNAL_ERROR); SSL_SESSION_free(ss); return 0; } memcpy(ss->sid_ctx, s->sid_ctx, s->sid_ctx_length); ss->sid_ctx_length = s->sid_ctx_length; s->session = ss; ss->ssl_version = s->version; ss->verify_result = X509_V_OK; return (1); } /* * ssl_get_prev attempts to find an SSL_SESSION to be used to resume this * connection. It is only called by servers. * * session_id: points at the session ID in the ClientHello. This code will * read past the end of this in order to parse out the session ticket * extension, if any. * len: the length of the session ID. * limit: a pointer to the first byte after the ClientHello. * * Returns: * -1: error * 0: a session may have been found. * * Side effects: * - If a session is found then s->session is pointed at it (after freeing * an existing session if need be) and s->verify_result is set from the * session. * - Both for new and resumed sessions, s->internal->tlsext_ticket_expected is set * to 1 if the server should issue a new session ticket (to 0 otherwise). */ int ssl_get_prev_session(SSL *s, unsigned char *session_id, int len, const unsigned char *limit) { SSL_SESSION *ret = NULL; int fatal = 0; int try_session_cache = 1; int r; /* This is used only by servers. */ if (len > SSL_MAX_SSL_SESSION_ID_LENGTH) goto err; if (len == 0) try_session_cache = 0; /* Sets s->internal->tlsext_ticket_expected. */ r = tls1_process_ticket(s, session_id, len, limit, &ret); switch (r) { case -1: /* Error during processing */ fatal = 1; goto err; case 0: /* No ticket found */ case 1: /* Zero length ticket found */ break; /* Ok to carry on processing session id. */ case 2: /* Ticket found but not decrypted. */ case 3: /* Ticket decrypted, *ret has been set. */ try_session_cache = 0; break; default: abort(); } if (try_session_cache && ret == NULL && !(s->session_ctx->internal->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_LOOKUP)) { SSL_SESSION data; data.ssl_version = s->version; data.session_id_length = len; memcpy(data.session_id, session_id, len); CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); ret = lh_SSL_SESSION_retrieve(s->session_ctx->internal->sessions, &data); if (ret != NULL) { /* Don't allow other threads to steal it. */ CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_SSL_SESSION); } CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); if (ret == NULL) s->session_ctx->internal->stats.sess_miss++; } if (try_session_cache && ret == NULL && s->session_ctx->internal->get_session_cb != NULL) { int copy = 1; if ((ret = s->session_ctx->internal->get_session_cb(s, session_id, len, ©))) { s->session_ctx->internal->stats.sess_cb_hit++; /* * Increment reference count now if the session * callback asks us to do so (note that if the session * structures returned by the callback are shared * between threads, it must handle the reference count * itself [i.e. copy == 0], or things won't be * thread-safe). */ if (copy) CRYPTO_add(&ret->references, 1, CRYPTO_LOCK_SSL_SESSION); /* * Add the externally cached session to the internal * cache as well if and only if we are supposed to. */ if (!(s->session_ctx->internal->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_STORE)) /* * The following should not return 1, * otherwise, things are very strange. */ SSL_CTX_add_session(s->session_ctx, ret); } } if (ret == NULL) goto err; /* Now ret is non-NULL and we own one of its reference counts. */ if (ret->sid_ctx_length != s->sid_ctx_length || timingsafe_memcmp(ret->sid_ctx, s->sid_ctx, ret->sid_ctx_length) != 0) { /* We have the session requested by the client, but we don't * want to use it in this context. */ goto err; /* treat like cache miss */ } if ((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0) { /* * We can't be sure if this session is being used out of * context, which is especially important for SSL_VERIFY_PEER. * The application should have used * SSL[_CTX]_set_session_id_context. * * For this error case, we generate an error instead of treating * the event like a cache miss (otherwise it would be easy for * applications to effectively disable the session cache by * accident without anyone noticing). */ SSLerror(s, SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED); fatal = 1; goto err; } if (ret->cipher == NULL) { ret->cipher = ssl3_get_cipher_by_id(ret->cipher_id); if (ret->cipher == NULL) goto err; } if (ret->timeout < (time(NULL) - ret->time)) { /* timeout */ s->session_ctx->internal->stats.sess_timeout++; if (try_session_cache) { /* session was from the cache, so remove it */ SSL_CTX_remove_session(s->session_ctx, ret); } goto err; } s->session_ctx->internal->stats.sess_hit++; if (s->session != NULL) SSL_SESSION_free(s->session); s->session = ret; s->verify_result = s->session->verify_result; return 1; err: if (ret != NULL) { SSL_SESSION_free(ret); if (!try_session_cache) { /* * The session was from a ticket, so we should * issue a ticket for the new session. */ s->internal->tlsext_ticket_expected = 1; } } if (fatal) return -1; else return 0; } int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c) { int ret = 0; SSL_SESSION *s; /* * Add just 1 reference count for the SSL_CTX's session cache * even though it has two ways of access: each session is in a * doubly linked list and an lhash. */ CRYPTO_add(&c->references, 1, CRYPTO_LOCK_SSL_SESSION); /* * If session c is in already in cache, we take back the increment * later. */ CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); s = lh_SSL_SESSION_insert(ctx->internal->sessions, c); /* * s != NULL iff we already had a session with the given PID. * In this case, s == c should hold (then we did not really modify * ctx->internal->sessions), or we're in trouble. */ if (s != NULL && s != c) { /* We *are* in trouble ... */ SSL_SESSION_list_remove(ctx, s); SSL_SESSION_free(s); /* * ... so pretend the other session did not exist in cache * (we cannot handle two SSL_SESSION structures with identical * session ID in the same cache, which could happen e.g. when * two threads concurrently obtain the same session from an * external cache). */ s = NULL; } /* Put at the head of the queue unless it is already in the cache */ if (s == NULL) SSL_SESSION_list_add(ctx, c); if (s != NULL) { /* * existing cache entry -- decrement previously incremented * reference count because it already takes into account the * cache. */ SSL_SESSION_free(s); /* s == c */ ret = 0; } else { /* * New cache entry -- remove old ones if cache has become * too large. */ ret = 1; if (SSL_CTX_sess_get_cache_size(ctx) > 0) { while (SSL_CTX_sess_number(ctx) > SSL_CTX_sess_get_cache_size(ctx)) { if (!remove_session_lock(ctx, ctx->internal->session_cache_tail, 0)) break; else ctx->internal->stats.sess_cache_full++; } } } CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); return (ret); } int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c) { return remove_session_lock(ctx, c, 1); } static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck) { SSL_SESSION *r; int ret = 0; if ((c != NULL) && (c->session_id_length != 0)) { if (lck) CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); if ((r = lh_SSL_SESSION_retrieve(ctx->internal->sessions, c)) == c) { ret = 1; r = lh_SSL_SESSION_delete(ctx->internal->sessions, c); SSL_SESSION_list_remove(ctx, c); } if (lck) CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); if (ret) { r->internal->not_resumable = 1; if (ctx->internal->remove_session_cb != NULL) ctx->internal->remove_session_cb(ctx, r); SSL_SESSION_free(r); } } else ret = 0; return (ret); } void SSL_SESSION_free(SSL_SESSION *ss) { int i; if (ss == NULL) return; i = CRYPTO_add(&ss->references, -1, CRYPTO_LOCK_SSL_SESSION); if (i > 0) return; CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->internal->ex_data); explicit_bzero(ss->master_key, sizeof ss->master_key); explicit_bzero(ss->session_id, sizeof ss->session_id); ssl_sess_cert_free(ss->internal->sess_cert); X509_free(ss->peer); sk_SSL_CIPHER_free(ss->ciphers); free(ss->tlsext_hostname); free(ss->tlsext_tick); free(ss->internal->tlsext_ecpointformatlist); free(ss->internal->tlsext_supportedgroups); freezero(ss->internal, sizeof(*ss->internal)); freezero(ss, sizeof(*ss)); } int SSL_SESSION_up_ref(SSL_SESSION *ss) { int refs = CRYPTO_add(&ss->references, 1, CRYPTO_LOCK_SSL_SESSION); return (refs > 1) ? 1 : 0; } int SSL_set_session(SSL *s, SSL_SESSION *session) { int ret = 0; const SSL_METHOD *meth; if (session != NULL) { meth = s->ctx->method->internal->get_ssl_method(session->ssl_version); if (meth == NULL) meth = s->method->internal->get_ssl_method(session->ssl_version); if (meth == NULL) { SSLerror(s, SSL_R_UNABLE_TO_FIND_SSL_METHOD); return (0); } if (meth != s->method) { if (!SSL_set_ssl_method(s, meth)) return (0); } /* CRYPTO_w_lock(CRYPTO_LOCK_SSL);*/ CRYPTO_add(&session->references, 1, CRYPTO_LOCK_SSL_SESSION); if (s->session != NULL) SSL_SESSION_free(s->session); s->session = session; s->verify_result = s->session->verify_result; /* CRYPTO_w_unlock(CRYPTO_LOCK_SSL);*/ ret = 1; } else { if (s->session != NULL) { SSL_SESSION_free(s->session); s->session = NULL; } meth = s->ctx->method; if (meth != s->method) { if (!SSL_set_ssl_method(s, meth)) return (0); } ret = 1; } return (ret); } size_t SSL_SESSION_get_master_key(const SSL_SESSION *ss, unsigned char *out, size_t max_out) { size_t len = ss->master_key_length; if (out == NULL) return len; if (len > max_out) len = max_out; memcpy(out, ss->master_key, len); return len; } long SSL_SESSION_set_timeout(SSL_SESSION *s, long t) { if (s == NULL) return (0); s->timeout = t; return (1); } long SSL_SESSION_get_timeout(const SSL_SESSION *s) { if (s == NULL) return (0); return (s->timeout); } /* XXX 2038 */ long SSL_SESSION_get_time(const SSL_SESSION *s) { if (s == NULL) return (0); return (s->time); } /* XXX 2038 */ long SSL_SESSION_set_time(SSL_SESSION *s, long t) { if (s == NULL) return (0); s->time = t; return (t); } int SSL_SESSION_get_protocol_version(const SSL_SESSION *s) { return s->ssl_version; } X509 * SSL_SESSION_get0_peer(SSL_SESSION *s) { return s->peer; } int SSL_SESSION_set1_id(SSL_SESSION *s, const unsigned char *sid, unsigned int sid_len) { if (sid_len > SSL_MAX_SSL_SESSION_ID_LENGTH) { SSLerrorx(SSL_R_SSL_SESSION_ID_TOO_LONG); return 0; } s->session_id_length = sid_len; memmove(s->session_id, sid, sid_len); return 1; } int SSL_SESSION_set1_id_context(SSL_SESSION *s, const unsigned char *sid_ctx, unsigned int sid_ctx_len) { if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { SSLerrorx(SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); return 0; } s->sid_ctx_length = sid_ctx_len; memcpy(s->sid_ctx, sid_ctx, sid_ctx_len); return 1; } long SSL_CTX_set_timeout(SSL_CTX *s, long t) { long l; if (s == NULL) return (0); l = s->session_timeout; s->session_timeout = t; return (l); } long SSL_CTX_get_timeout(const SSL_CTX *s) { if (s == NULL) return (0); return (s->session_timeout); } int SSL_set_session_secret_cb(SSL *s, int (*tls_session_secret_cb)(SSL *s, void *secret, int *secret_len, STACK_OF(SSL_CIPHER) *peer_ciphers, SSL_CIPHER **cipher, void *arg), void *arg) { if (s == NULL) return (0); s->internal->tls_session_secret_cb = tls_session_secret_cb; s->internal->tls_session_secret_cb_arg = arg; return (1); } int SSL_set_session_ticket_ext_cb(SSL *s, tls_session_ticket_ext_cb_fn cb, void *arg) { if (s == NULL) return (0); s->internal->tls_session_ticket_ext_cb = cb; s->internal->tls_session_ticket_ext_cb_arg = arg; return (1); } int SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len) { if (s->version >= TLS1_VERSION) { free(s->internal->tlsext_session_ticket); s->internal->tlsext_session_ticket = malloc(sizeof(TLS_SESSION_TICKET_EXT) + ext_len); if (!s->internal->tlsext_session_ticket) { SSLerror(s, ERR_R_MALLOC_FAILURE); return 0; } if (ext_data) { s->internal->tlsext_session_ticket->length = ext_len; s->internal->tlsext_session_ticket->data = s->internal->tlsext_session_ticket + 1; memcpy(s->internal->tlsext_session_ticket->data, ext_data, ext_len); } else { s->internal->tlsext_session_ticket->length = 0; s->internal->tlsext_session_ticket->data = NULL; } return 1; } return 0; } typedef struct timeout_param_st { SSL_CTX *ctx; long time; struct lhash_st_SSL_SESSION *cache; } TIMEOUT_PARAM; static void timeout_doall_arg(SSL_SESSION *s, TIMEOUT_PARAM *p) { if ((p->time == 0) || (p->time > (s->time + s->timeout))) { /* timeout */ /* The reason we don't call SSL_CTX_remove_session() is to * save on locking overhead */ (void)lh_SSL_SESSION_delete(p->cache, s); SSL_SESSION_list_remove(p->ctx, s); s->internal->not_resumable = 1; if (p->ctx->internal->remove_session_cb != NULL) p->ctx->internal->remove_session_cb(p->ctx, s); SSL_SESSION_free(s); } } static void timeout_LHASH_DOALL_ARG(void *arg1, void *arg2) { SSL_SESSION *a = arg1; TIMEOUT_PARAM *b = arg2; timeout_doall_arg(a, b); } /* XXX 2038 */ void SSL_CTX_flush_sessions(SSL_CTX *s, long t) { unsigned long i; TIMEOUT_PARAM tp; tp.ctx = s; tp.cache = s->internal->sessions; if (tp.cache == NULL) return; tp.time = t; CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); i = CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load; CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load = 0; lh_SSL_SESSION_doall_arg(tp.cache, timeout_LHASH_DOALL_ARG, TIMEOUT_PARAM, &tp); CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load = i; CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); } int ssl_clear_bad_session(SSL *s) { if ((s->session != NULL) && !(s->internal->shutdown & SSL_SENT_SHUTDOWN) && !(SSL_in_init(s) || SSL_in_before(s))) { SSL_CTX_remove_session(s->ctx, s->session); return (1); } else return (0); } /* locked by SSL_CTX in the calling function */ static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s) { if ((s->internal->next == NULL) || (s->internal->prev == NULL)) return; if (s->internal->next == (SSL_SESSION *)&(ctx->internal->session_cache_tail)) { /* last element in list */ if (s->internal->prev == (SSL_SESSION *)&(ctx->internal->session_cache_head)) { /* only one element in list */ ctx->internal->session_cache_head = NULL; ctx->internal->session_cache_tail = NULL; } else { ctx->internal->session_cache_tail = s->internal->prev; s->internal->prev->internal->next = (SSL_SESSION *)&(ctx->internal->session_cache_tail); } } else { if (s->internal->prev == (SSL_SESSION *)&(ctx->internal->session_cache_head)) { /* first element in list */ ctx->internal->session_cache_head = s->internal->next; s->internal->next->internal->prev = (SSL_SESSION *)&(ctx->internal->session_cache_head); } else { /* middle of list */ s->internal->next->internal->prev = s->internal->prev; s->internal->prev->internal->next = s->internal->next; } } s->internal->prev = s->internal->next = NULL; } static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s) { if ((s->internal->next != NULL) && (s->internal->prev != NULL)) SSL_SESSION_list_remove(ctx, s); if (ctx->internal->session_cache_head == NULL) { ctx->internal->session_cache_head = s; ctx->internal->session_cache_tail = s; s->internal->prev = (SSL_SESSION *)&(ctx->internal->session_cache_head); s->internal->next = (SSL_SESSION *)&(ctx->internal->session_cache_tail); } else { s->internal->next = ctx->internal->session_cache_head; s->internal->next->internal->prev = s; s->internal->prev = (SSL_SESSION *)&(ctx->internal->session_cache_head); ctx->internal->session_cache_head = s; } } void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx, int (*cb)(struct ssl_st *ssl, SSL_SESSION *sess)) { ctx->internal->new_session_cb = cb; } int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx))(SSL *ssl, SSL_SESSION *sess) { return ctx->internal->new_session_cb; } void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx, void (*cb)(SSL_CTX *ctx, SSL_SESSION *sess)) { ctx->internal->remove_session_cb = cb; } void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx))(SSL_CTX * ctx, SSL_SESSION *sess) { return ctx->internal->remove_session_cb; } void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx, SSL_SESSION *(*cb)(struct ssl_st *ssl, const unsigned char *data, int len, int *copy)) { ctx->internal->get_session_cb = cb; } SSL_SESSION * (*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx))(SSL *ssl, const unsigned char *data, int len, int *copy) { return ctx->internal->get_session_cb; } void SSL_CTX_set_info_callback(SSL_CTX *ctx, void (*cb)(const SSL *ssl, int type, int val)) { ctx->internal->info_callback = cb; } void (*SSL_CTX_get_info_callback(SSL_CTX *ctx))(const SSL *ssl, int type, int val) { return ctx->internal->info_callback; } void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx, int (*cb)(SSL *ssl, X509 **x509, EVP_PKEY **pkey)) { ctx->internal->client_cert_cb = cb; } int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx))(SSL * ssl, X509 ** x509, EVP_PKEY **pkey) { return ctx->internal->client_cert_cb; } #ifndef OPENSSL_NO_ENGINE int SSL_CTX_set_client_cert_engine(SSL_CTX *ctx, ENGINE *e) { if (!ENGINE_init(e)) { SSLerrorx(ERR_R_ENGINE_LIB); return 0; } if (!ENGINE_get_ssl_client_cert_function(e)) { SSLerrorx(SSL_R_NO_CLIENT_CERT_METHOD); ENGINE_finish(e); return 0; } ctx->internal->client_cert_engine = e; return 1; } #endif void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx, int (*cb)(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len)) { ctx->internal->app_gen_cookie_cb = cb; } void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx, int (*cb)(SSL *ssl, const unsigned char *cookie, unsigned int cookie_len)) { ctx->internal->app_verify_cookie_cb = cb; } int PEM_write_SSL_SESSION(FILE *fp, SSL_SESSION *x) { return PEM_ASN1_write((i2d_of_void *)i2d_SSL_SESSION, PEM_STRING_SSL_SESSION, fp, x, NULL, NULL, 0, NULL, NULL); } SSL_SESSION * PEM_read_SSL_SESSION(FILE *fp, SSL_SESSION **x, pem_password_cb *cb, void *u) { return PEM_ASN1_read((d2i_of_void *)d2i_SSL_SESSION, PEM_STRING_SSL_SESSION, fp, (void **)x, cb, u); } SSL_SESSION * PEM_read_bio_SSL_SESSION(BIO *bp, SSL_SESSION **x, pem_password_cb *cb, void *u) { return PEM_ASN1_read_bio((d2i_of_void *)d2i_SSL_SESSION, PEM_STRING_SSL_SESSION, bp, (void **)x, cb, u); } int PEM_write_bio_SSL_SESSION(BIO *bp, SSL_SESSION *x) { return PEM_ASN1_write_bio((i2d_of_void *)i2d_SSL_SESSION, PEM_STRING_SSL_SESSION, bp, x, NULL, NULL, 0, NULL, NULL); }