/* * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. * Copyright 2005 Nokia. All rights reserved. * * Licensed under the OpenSSL license (the "License"). You may not use * this file except in compliance with the License. You can obtain a copy * in the file LICENSE in the source distribution or at * https://www.openssl.org/source/license.html */ #include #include #include #include #include "ssl_locl.h" #include "statem/statem_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); /* * SSL_get_session() and SSL_get1_session() are problematic in TLS1.3 because, * unlike in earlier protocol versions, the session ticket may not have been * sent yet even though a handshake has finished. The session ticket data could * come in sometime later...or even change if multiple session ticket messages * are sent from the server. The preferred way for applications to obtain * a resumable session is to use SSL_CTX_sess_set_new_cb(). */ SSL_SESSION *SSL_get_session(const SSL *ssl) /* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */ { return (ssl->session); } SSL_SESSION *SSL_get1_session(SSL *ssl) /* variant of SSL_get_session: caller really gets something */ { 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_THREAD_read_lock(ssl->lock); sess = ssl->session; if (sess) SSL_SESSION_up_ref(sess); CRYPTO_THREAD_unlock(ssl->lock); return sess; } int SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg) { return (CRYPTO_set_ex_data(&s->ex_data, idx, arg)); } void *SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx) { return (CRYPTO_get_ex_data(&s->ex_data, idx)); } SSL_SESSION *SSL_SESSION_new(void) { SSL_SESSION *ss; if (!OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL)) return NULL; ss = OPENSSL_zalloc(sizeof(*ss)); if (ss == NULL) { SSLerr(SSL_F_SSL_SESSION_NEW, 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 = (unsigned long)time(NULL); ss->lock = CRYPTO_THREAD_lock_new(); if (ss->lock == NULL) { SSLerr(SSL_F_SSL_SESSION_NEW, ERR_R_MALLOC_FAILURE); OPENSSL_free(ss); return NULL; } if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data)) { CRYPTO_THREAD_lock_free(ss->lock); OPENSSL_free(ss); return NULL; } return ss; } /* * Create a new SSL_SESSION and duplicate the contents of |src| into it. If * ticket == 0 then no ticket information is duplicated, otherwise it is. */ SSL_SESSION *ssl_session_dup(SSL_SESSION *src, int ticket) { SSL_SESSION *dest; dest = OPENSSL_malloc(sizeof(*src)); if (dest == NULL) { goto err; } memcpy(dest, src, sizeof(*dest)); /* * Set the various pointers to NULL so that we can call SSL_SESSION_free in * the case of an error whilst halfway through constructing dest */ #ifndef OPENSSL_NO_PSK dest->psk_identity_hint = NULL; dest->psk_identity = NULL; #endif dest->ciphers = NULL; dest->ext.hostname = NULL; #ifndef OPENSSL_NO_EC dest->ext.ecpointformats = NULL; dest->ext.supportedgroups = NULL; #endif dest->ext.tick = NULL; dest->ext.alpn_selected = NULL; #ifndef OPENSSL_NO_SRP dest->srp_username = NULL; #endif dest->peer_chain = NULL; dest->peer = NULL; dest->ext.tick_nonce = NULL; memset(&dest->ex_data, 0, sizeof(dest->ex_data)); /* We deliberately don't copy the prev and next pointers */ dest->prev = NULL; dest->next = NULL; dest->references = 1; dest->lock = CRYPTO_THREAD_lock_new(); if (dest->lock == NULL) goto err; if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, dest, &dest->ex_data)) goto err; if (src->peer != NULL) { if (!X509_up_ref(src->peer)) goto err; dest->peer = src->peer; } if (src->peer_chain != NULL) { dest->peer_chain = X509_chain_up_ref(src->peer_chain); if (dest->peer_chain == NULL) goto err; } #ifndef OPENSSL_NO_PSK if (src->psk_identity_hint) { dest->psk_identity_hint = OPENSSL_strdup(src->psk_identity_hint); if (dest->psk_identity_hint == NULL) { goto err; } } if (src->psk_identity) { dest->psk_identity = OPENSSL_strdup(src->psk_identity); if (dest->psk_identity == NULL) { goto err; } } #endif if (src->ciphers != NULL) { dest->ciphers = sk_SSL_CIPHER_dup(src->ciphers); if (dest->ciphers == NULL) goto err; } if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, &dest->ex_data, &src->ex_data)) { goto err; } if (src->ext.hostname) { dest->ext.hostname = OPENSSL_strdup(src->ext.hostname); if (dest->ext.hostname == NULL) { goto err; } } #ifndef OPENSSL_NO_EC if (src->ext.ecpointformats) { dest->ext.ecpointformats = OPENSSL_memdup(src->ext.ecpointformats, src->ext.ecpointformats_len); if (dest->ext.ecpointformats == NULL) goto err; } if (src->ext.supportedgroups) { dest->ext.supportedgroups = OPENSSL_memdup(src->ext.supportedgroups, src->ext.supportedgroups_len); if (dest->ext.supportedgroups == NULL) goto err; } #endif if (ticket != 0 && src->ext.tick != NULL) { dest->ext.tick = OPENSSL_memdup(src->ext.tick, src->ext.ticklen); if (dest->ext.tick == NULL) goto err; } else { dest->ext.tick_lifetime_hint = 0; dest->ext.ticklen = 0; } if (src->ext.alpn_selected) { dest->ext.alpn_selected = (unsigned char*)OPENSSL_strndup((char*)src->ext.alpn_selected, src->ext.alpn_selected_len); if (dest->ext.alpn_selected == NULL) { goto err; } } if (src->ext.tick_nonce != NULL) { dest->ext.tick_nonce = OPENSSL_memdup(src->ext.tick_nonce, src->ext.tick_nonce_len); if (dest->ext.tick_nonce == NULL) goto err; } #ifndef OPENSSL_NO_SRP if (src->srp_username) { dest->srp_username = OPENSSL_strdup(src->srp_username); if (dest->srp_username == NULL) { goto err; } } #endif return dest; err: SSLerr(SSL_F_SSL_SESSION_DUP, ERR_R_MALLOC_FAILURE); SSL_SESSION_free(dest); return NULL; } const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *s, unsigned int *len) { if (len) *len = (unsigned int)s->session_id_length; return s->session_id; } const unsigned char *SSL_SESSION_get0_id_context(const SSL_SESSION *s, unsigned int *len) { if (len != NULL) *len = (unsigned int)s->sid_ctx_length; return s->sid_ctx; } unsigned int SSL_SESSION_get_compress_id(const SSL_SESSION *s) { return s->compress_meth; } /* * SSLv3/TLSv1 has 32 bytes (256 bits) of session ID space. As such, filling * the ID with random junk 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 * RAND code is broken or someone is trying to open roughly very close to * 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 if (RAND_bytes(id, *id_len) <= 0) return 0; 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) { /* This gets used by clients and servers. */ unsigned int tmp; SSL_SESSION *ss = NULL; GEN_SESSION_CB cb = def_generate_session_id; 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; SSL_SESSION_free(s->session); s->session = NULL; if (session) { if (s->version == SSL3_VERSION) { ss->ssl_version = SSL3_VERSION; ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; } else if (s->version == TLS1_VERSION) { ss->ssl_version = TLS1_VERSION; ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; } else if (s->version == TLS1_1_VERSION) { ss->ssl_version = TLS1_1_VERSION; ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; } else if (s->version == TLS1_2_VERSION) { ss->ssl_version = TLS1_2_VERSION; ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; } else if (s->version == TLS1_3_VERSION) { ss->ssl_version = TLS1_3_VERSION; ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; } else if (s->version == DTLS1_BAD_VER) { ss->ssl_version = DTLS1_BAD_VER; ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; } else if (s->version == DTLS1_VERSION) { ss->ssl_version = DTLS1_VERSION; ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; } else if (s->version == DTLS1_2_VERSION) { ss->ssl_version = DTLS1_2_VERSION; ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; } else { SSLerr(SSL_F_SSL_GET_NEW_SESSION, SSL_R_UNSUPPORTED_SSL_VERSION); SSL_SESSION_free(ss); return (0); } /*- * If RFC5077 ticket, use empty session ID (as server). * Note that: * (a) ssl_get_prev_session() does lookahead into the * ClientHello extensions to find the session ticket. * When ssl_get_prev_session() fails, statem_srvr.c calls * ssl_get_new_session() in tls_process_client_hello(). * At that point, it has not yet parsed the extensions, * however, because of the lookahead, it already knows * whether a ticket is expected or not. * * (b) statem_clnt.c calls ssl_get_new_session() before parsing * ServerHello extensions, and before recording the session * ID received from the server, so this block is a noop. */ if (s->ext.ticket_expected) { ss->session_id_length = 0; goto sess_id_done; } /* Choose which callback will set the session ID */ CRYPTO_THREAD_read_lock(s->lock); CRYPTO_THREAD_read_lock(s->session_ctx->lock); if (s->generate_session_id) cb = s->generate_session_id; else if (s->session_ctx->generate_session_id) cb = s->session_ctx->generate_session_id; CRYPTO_THREAD_unlock(s->session_ctx->lock); CRYPTO_THREAD_unlock(s->lock); /* Choose a session ID */ memset(ss->session_id, 0, ss->session_id_length); tmp = (int)ss->session_id_length; if (!cb(s, ss->session_id, &tmp)) { /* The callback failed */ SSLerr(SSL_F_SSL_GET_NEW_SESSION, 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 == 0 || tmp > ss->session_id_length) { /* The callback set an illegal length */ SSLerr(SSL_F_SSL_GET_NEW_SESSION, 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, (unsigned int)ss->session_id_length)) { SSLerr(SSL_F_SSL_GET_NEW_SESSION, SSL_R_SSL_SESSION_ID_CONFLICT); SSL_SESSION_free(ss); return (0); } sess_id_done: if (s->ext.hostname) { ss->ext.hostname = OPENSSL_strdup(s->ext.hostname); if (ss->ext.hostname == NULL) { SSLerr(SSL_F_SSL_GET_NEW_SESSION, 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) { SSLerr(SSL_F_SSL_GET_NEW_SESSION, 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; /* If client supports extended master secret set it in session */ if (s->s3->flags & TLS1_FLAGS_RECEIVED_EXTMS) ss->flags |= SSL_SESS_FLAG_EXTMS; return (1); } /*- * ssl_get_prev attempts to find an SSL_SESSION to be used to resume this * connection. It is only called by servers. * * hello: The parsed ClientHello data * * Returns: * -1: fatal error * 0: no session found * 1: 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->ext.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, CLIENTHELLO_MSG *hello, int *al) { /* This is used only by servers. */ SSL_SESSION *ret = NULL; int fatal = 0; int try_session_cache = 0; TICKET_RETURN r; if (SSL_IS_TLS13(s)) { if (!tls_parse_extension(s, TLSEXT_IDX_psk_kex_modes, SSL_EXT_CLIENT_HELLO, hello->pre_proc_exts, NULL, 0, al) || !tls_parse_extension(s, TLSEXT_IDX_psk, SSL_EXT_CLIENT_HELLO, hello->pre_proc_exts, NULL, 0, al)) return -1; ret = s->session; } else { /* sets s->ext.ticket_expected */ r = tls_get_ticket_from_client(s, hello, &ret); switch (r) { case TICKET_FATAL_ERR_MALLOC: case TICKET_FATAL_ERR_OTHER: fatal = 1; goto err; case TICKET_NONE: case TICKET_EMPTY: try_session_cache = 1; break; case TICKET_NO_DECRYPT: case TICKET_SUCCESS: case TICKET_SUCCESS_RENEW: break; } } if (try_session_cache && ret == NULL && !(s->session_ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_LOOKUP)) { SSL_SESSION data; data.ssl_version = s->version; memcpy(data.session_id, hello->session_id, hello->session_id_len); data.session_id_length = hello->session_id_len; CRYPTO_THREAD_read_lock(s->session_ctx->lock); ret = lh_SSL_SESSION_retrieve(s->session_ctx->sessions, &data); if (ret != NULL) { /* don't allow other threads to steal it: */ SSL_SESSION_up_ref(ret); } CRYPTO_THREAD_unlock(s->session_ctx->lock); if (ret == NULL) s->session_ctx->stats.sess_miss++; } if (try_session_cache && ret == NULL && s->session_ctx->get_session_cb != NULL) { int copy = 1; ret = s->session_ctx->get_session_cb(s, hello->session_id, hello->session_id_len, ©); if (ret != NULL) { s->session_ctx->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) SSL_SESSION_up_ref(ret); /* * Add the externally cached session to the internal cache as * well if and only if we are supposed to. */ if (! (s->session_ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_STORE)) { /* * The following should not return 1, otherwise, things are * very strange */ if (SSL_CTX_add_session(s->session_ctx, ret)) goto err; } } } if (ret == NULL) goto err; /* Now ret is non-NULL and we own one of its reference counts. */ /* Check TLS version consistency */ if (ret->ssl_version != s->version) goto err; if (ret->sid_ctx_length != s->sid_ctx_length || memcmp(ret->sid_ctx, s->sid_ctx, ret->sid_ctx_length)) { /* * 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). */ SSLerr(SSL_F_SSL_GET_PREV_SESSION, SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED); fatal = 1; goto err; } if (ret->timeout < (long)(time(NULL) - ret->time)) { /* timeout */ s->session_ctx->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; } /* Check extended master secret extension consistency */ if (ret->flags & SSL_SESS_FLAG_EXTMS) { /* If old session includes extms, but new does not: abort handshake */ if (!(s->s3->flags & TLS1_FLAGS_RECEIVED_EXTMS)) { SSLerr(SSL_F_SSL_GET_PREV_SESSION, SSL_R_INCONSISTENT_EXTMS); ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER); fatal = 1; goto err; } } else if (s->s3->flags & TLS1_FLAGS_RECEIVED_EXTMS) { /* If new session includes extms, but old does not: do not resume */ goto err; } if (!SSL_IS_TLS13(s)) { /* We already did this for TLS1.3 */ SSL_SESSION_free(s->session); s->session = ret; } s->session_ctx->stats.sess_hit++; s->verify_result = s->session->verify_result; return 1; err: if (ret != NULL) { SSL_SESSION_free(ret); /* In TLSv1.3 s->session was already set to ret, so we NULL it out */ if (SSL_IS_TLS13(s)) s->session = NULL; if (!try_session_cache) { /* * The session was from a ticket, so we should issue a ticket for * the new session */ s->ext.ticket_expected = 1; } } if (fatal) { *al = SSL_AD_INTERNAL_ERROR; return -1; } 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 */ SSL_SESSION_up_ref(c); /* * if session c is in already in cache, we take back the increment later */ CRYPTO_THREAD_write_lock(ctx->lock); s = lh_SSL_SESSION_insert(ctx->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->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; } else if (s == NULL && lh_SSL_SESSION_retrieve(ctx->sessions, c) == NULL) { /* s == NULL can also mean OOM error in lh_SSL_SESSION_insert ... */ /* * ... so take back the extra reference and also don't add * the session to the SSL_SESSION_list at this time */ s = c; } /* 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->session_cache_tail, 0)) break; else ctx->stats.sess_cache_full++; } } } CRYPTO_THREAD_unlock(ctx->lock); 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_THREAD_write_lock(ctx->lock); if ((r = lh_SSL_SESSION_retrieve(ctx->sessions, c)) == c) { ret = 1; r = lh_SSL_SESSION_delete(ctx->sessions, c); SSL_SESSION_list_remove(ctx, c); } c->not_resumable = 1; if (lck) CRYPTO_THREAD_unlock(ctx->lock); if (ret) SSL_SESSION_free(r); if (ctx->remove_session_cb != NULL) ctx->remove_session_cb(ctx, c); } else ret = 0; return (ret); } void SSL_SESSION_free(SSL_SESSION *ss) { int i; if (ss == NULL) return; CRYPTO_DOWN_REF(&ss->references, &i, ss->lock); REF_PRINT_COUNT("SSL_SESSION", ss); if (i > 0) return; REF_ASSERT_ISNT(i < 0); CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data); OPENSSL_cleanse(ss->master_key, sizeof ss->master_key); OPENSSL_cleanse(ss->session_id, sizeof ss->session_id); X509_free(ss->peer); sk_X509_pop_free(ss->peer_chain, X509_free); sk_SSL_CIPHER_free(ss->ciphers); OPENSSL_free(ss->ext.hostname); OPENSSL_free(ss->ext.tick); #ifndef OPENSSL_NO_EC OPENSSL_free(ss->ext.ecpointformats); ss->ext.ecpointformats = NULL; ss->ext.ecpointformats_len = 0; OPENSSL_free(ss->ext.supportedgroups); ss->ext.supportedgroups = NULL; ss->ext.supportedgroups_len = 0; #endif /* OPENSSL_NO_EC */ #ifndef OPENSSL_NO_PSK OPENSSL_free(ss->psk_identity_hint); OPENSSL_free(ss->psk_identity); #endif #ifndef OPENSSL_NO_SRP OPENSSL_free(ss->srp_username); #endif OPENSSL_free(ss->ext.alpn_selected); OPENSSL_free(ss->ext.tick_nonce); CRYPTO_THREAD_lock_free(ss->lock); OPENSSL_clear_free(ss, sizeof(*ss)); } int SSL_SESSION_up_ref(SSL_SESSION *ss) { int i; if (CRYPTO_UP_REF(&ss->references, &i, ss->lock) <= 0) return 0; REF_PRINT_COUNT("SSL_SESSION", ss); REF_ASSERT_ISNT(i < 2); return ((i > 1) ? 1 : 0); } int SSL_set_session(SSL *s, SSL_SESSION *session) { ssl_clear_bad_session(s); if (s->ctx->method != s->method) { if (!SSL_set_ssl_method(s, s->ctx->method)) return 0; } if (session != NULL) { SSL_SESSION_up_ref(session); s->verify_result = session->verify_result; } SSL_SESSION_free(s->session); s->session = session; return 1; } 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) { SSLerr(SSL_F_SSL_SESSION_SET1_ID, SSL_R_SSL_SESSION_ID_TOO_LONG); return 0; } s->session_id_length = sid_len; if (sid != s->session_id) memcpy(s->session_id, sid, sid_len); return 1; } 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); } long SSL_SESSION_get_time(const SSL_SESSION *s) { if (s == NULL) return (0); return (s->time); } 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; } int SSL_SESSION_set_protocol_version(SSL_SESSION *s, int version) { s->ssl_version = version; return 1; } const SSL_CIPHER *SSL_SESSION_get0_cipher(const SSL_SESSION *s) { return s->cipher; } int SSL_SESSION_set_cipher(SSL_SESSION *s, const SSL_CIPHER *cipher) { s->cipher = cipher; return 1; } const char *SSL_SESSION_get0_hostname(const SSL_SESSION *s) { return s->ext.hostname; } int SSL_SESSION_has_ticket(const SSL_SESSION *s) { return (s->ext.ticklen > 0) ? 1 : 0; } unsigned long SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION *s) { return s->ext.tick_lifetime_hint; } void SSL_SESSION_get0_ticket(const SSL_SESSION *s, const unsigned char **tick, size_t *len) { *len = s->ext.ticklen; if (tick != NULL) *tick = s->ext.tick; } uint32_t SSL_SESSION_get_max_early_data(const SSL_SESSION *s) { return s->ext.max_early_data; } X509 *SSL_SESSION_get0_peer(SSL_SESSION *s) { return s->peer; } 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) { SSLerr(SSL_F_SSL_SESSION_SET1_ID_CONTEXT, SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); return 0; } s->sid_ctx_length = sid_ctx_len; if (sid_ctx != s->sid_ctx) memcpy(s->sid_ctx, sid_ctx, sid_ctx_len); return 1; } int SSL_SESSION_is_resumable(const SSL_SESSION *s) { /* * In the case of EAP-FAST, we can have a pre-shared "ticket" without a * session ID. */ return !s->not_resumable && (s->session_id_length > 0 || s->ext.ticklen > 0); } 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, tls_session_secret_cb_fn tls_session_secret_cb, void *arg) { if (s == NULL) return (0); s->ext.session_secret_cb = tls_session_secret_cb; s->ext.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->ext.session_ticket_cb = cb; s->ext.session_ticket_cb_arg = arg; return (1); } int SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len) { if (s->version >= TLS1_VERSION) { OPENSSL_free(s->ext.session_ticket); s->ext.session_ticket = NULL; s->ext.session_ticket = OPENSSL_malloc(sizeof(TLS_SESSION_TICKET_EXT) + ext_len); if (s->ext.session_ticket == NULL) { SSLerr(SSL_F_SSL_SET_SESSION_TICKET_EXT, ERR_R_MALLOC_FAILURE); return 0; } if (ext_data != NULL) { s->ext.session_ticket->length = ext_len; s->ext.session_ticket->data = s->ext.session_ticket + 1; memcpy(s->ext.session_ticket->data, ext_data, ext_len); } else { s->ext.session_ticket->length = 0; s->ext.session_ticket->data = NULL; } return 1; } return 0; } typedef struct timeout_param_st { SSL_CTX *ctx; long time; LHASH_OF(SSL_SESSION) *cache; } TIMEOUT_PARAM; static void timeout_cb(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->not_resumable = 1; if (p->ctx->remove_session_cb != NULL) p->ctx->remove_session_cb(p->ctx, s); SSL_SESSION_free(s); } } IMPLEMENT_LHASH_DOALL_ARG(SSL_SESSION, TIMEOUT_PARAM); void SSL_CTX_flush_sessions(SSL_CTX *s, long t) { unsigned long i; TIMEOUT_PARAM tp; tp.ctx = s; tp.cache = s->sessions; if (tp.cache == NULL) return; tp.time = t; CRYPTO_THREAD_write_lock(s->lock); i = lh_SSL_SESSION_get_down_load(s->sessions); lh_SSL_SESSION_set_down_load(s->sessions, 0); lh_SSL_SESSION_doall_TIMEOUT_PARAM(tp.cache, timeout_cb, &tp); lh_SSL_SESSION_set_down_load(s->sessions, i); CRYPTO_THREAD_unlock(s->lock); } int ssl_clear_bad_session(SSL *s) { if ((s->session != NULL) && !(s->shutdown & SSL_SENT_SHUTDOWN) && !(SSL_in_init(s) || SSL_in_before(s))) { SSL_CTX_remove_session(s->session_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->next == NULL) || (s->prev == NULL)) return; if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail)) { /* last element in list */ if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { /* only one element in list */ ctx->session_cache_head = NULL; ctx->session_cache_tail = NULL; } else { ctx->session_cache_tail = s->prev; s->prev->next = (SSL_SESSION *)&(ctx->session_cache_tail); } } else { if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) { /* first element in list */ ctx->session_cache_head = s->next; s->next->prev = (SSL_SESSION *)&(ctx->session_cache_head); } else { /* middle of list */ s->next->prev = s->prev; s->prev->next = s->next; } } s->prev = s->next = NULL; } static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s) { if ((s->next != NULL) && (s->prev != NULL)) SSL_SESSION_list_remove(ctx, s); if (ctx->session_cache_head == NULL) { ctx->session_cache_head = s; ctx->session_cache_tail = s; s->prev = (SSL_SESSION *)&(ctx->session_cache_head); s->next = (SSL_SESSION *)&(ctx->session_cache_tail); } else { s->next = ctx->session_cache_head; s->next->prev = s; s->prev = (SSL_SESSION *)&(ctx->session_cache_head); ctx->session_cache_head = s; } } void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx, int (*cb) (struct ssl_st *ssl, SSL_SESSION *sess)) { ctx->new_session_cb = cb; } int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx)) (SSL *ssl, SSL_SESSION *sess) { return ctx->new_session_cb; } void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx, void (*cb) (SSL_CTX *ctx, SSL_SESSION *sess)) { ctx->remove_session_cb = cb; } void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx)) (SSL_CTX *ctx, SSL_SESSION *sess) { return ctx->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->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->get_session_cb; } void SSL_CTX_set_info_callback(SSL_CTX *ctx, void (*cb) (const SSL *ssl, int type, int val)) { ctx->info_callback = cb; } void (*SSL_CTX_get_info_callback(SSL_CTX *ctx)) (const SSL *ssl, int type, int val) { return ctx->info_callback; } void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx, int (*cb) (SSL *ssl, X509 **x509, EVP_PKEY **pkey)) { ctx->client_cert_cb = cb; } int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx)) (SSL *ssl, X509 **x509, EVP_PKEY **pkey) { return ctx->client_cert_cb; } #ifndef OPENSSL_NO_ENGINE int SSL_CTX_set_client_cert_engine(SSL_CTX *ctx, ENGINE *e) { if (!ENGINE_init(e)) { SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, ERR_R_ENGINE_LIB); return 0; } if (!ENGINE_get_ssl_client_cert_function(e)) { SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, SSL_R_NO_CLIENT_CERT_METHOD); ENGINE_finish(e); return 0; } ctx->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->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->app_verify_cookie_cb = cb; } IMPLEMENT_PEM_rw(SSL_SESSION, SSL_SESSION, PEM_STRING_SSL_SESSION, SSL_SESSION)