/* 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 #include #include #include #include #include #include #include #include "internal.h" #include "../crypto/internal.h" /* The address of this is a magic value, a pointer to which is returned by * SSL_magic_pending_session_ptr(). It allows a session callback to indicate * that it needs to asynchronously fetch session information. */ static const char g_pending_session_magic = 0; static CRYPTO_EX_DATA_CLASS g_ex_data_class = CRYPTO_EX_DATA_CLASS_INIT_WITH_APP_DATA; static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *session); static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *session); static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *session, int lock); SSL_SESSION *SSL_SESSION_new(void) { SSL_SESSION *session = (SSL_SESSION *)OPENSSL_malloc(sizeof(SSL_SESSION)); if (session == NULL) { OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE); return 0; } memset(session, 0, sizeof(SSL_SESSION)); session->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */ session->references = 1; session->timeout = SSL_DEFAULT_SESSION_TIMEOUT; session->time = (unsigned long)time(NULL); CRYPTO_new_ex_data(&g_ex_data_class, session, &session->ex_data); return session; } SSL_SESSION *SSL_SESSION_up_ref(SSL_SESSION *session) { if (session != NULL) { CRYPTO_refcount_inc(&session->references); } return session; } void SSL_SESSION_free(SSL_SESSION *session) { if (session == NULL || !CRYPTO_refcount_dec_and_test_zero(&session->references)) { return; } CRYPTO_free_ex_data(&g_ex_data_class, session, &session->ex_data); OPENSSL_cleanse(session->master_key, sizeof(session->master_key)); OPENSSL_cleanse(session->session_id, sizeof(session->session_id)); X509_free(session->peer); sk_X509_pop_free(session->cert_chain, X509_free); OPENSSL_free(session->tlsext_hostname); OPENSSL_free(session->tlsext_tick); OPENSSL_free(session->tlsext_signed_cert_timestamp_list); OPENSSL_free(session->ocsp_response); OPENSSL_free(session->psk_identity); OPENSSL_cleanse(session, sizeof(*session)); OPENSSL_free(session); } const uint8_t *SSL_SESSION_get_id(const SSL_SESSION *session, unsigned *out_len) { if (out_len != NULL) { *out_len = session->session_id_length; } return session->session_id; } long SSL_SESSION_get_timeout(const SSL_SESSION *session) { return session->timeout; } long SSL_SESSION_get_time(const SSL_SESSION *session) { if (session == NULL) { /* NULL should crash, but silently accept it here for compatibility. */ return 0; } return session->time; } uint32_t SSL_SESSION_get_key_exchange_info(const SSL_SESSION *session) { return session->key_exchange_info; } X509 *SSL_SESSION_get0_peer(const SSL_SESSION *session) { return session->peer; } long SSL_SESSION_set_time(SSL_SESSION *session, long time) { if (session == NULL) { return 0; } session->time = time; return time; } long SSL_SESSION_set_timeout(SSL_SESSION *session, long timeout) { if (session == NULL) { return 0; } session->timeout = timeout; return 1; } int SSL_SESSION_set1_id_context(SSL_SESSION *session, const uint8_t *sid_ctx, unsigned sid_ctx_len) { if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { OPENSSL_PUT_ERROR(SSL, SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); return 0; } session->sid_ctx_length = sid_ctx_len; memcpy(session->sid_ctx, sid_ctx, sid_ctx_len); return 1; } SSL_SESSION *SSL_magic_pending_session_ptr(void) { return (SSL_SESSION *)&g_pending_session_magic; } 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 */ return SSL_SESSION_up_ref(ssl->session); } 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) { int index; if (!CRYPTO_get_ex_new_index(&g_ex_data_class, &index, argl, argp, new_func, dup_func, free_func)) { return -1; } return index; } int SSL_SESSION_set_ex_data(SSL_SESSION *session, int idx, void *arg) { return CRYPTO_set_ex_data(&session->ex_data, idx, arg); } void *SSL_SESSION_get_ex_data(const SSL_SESSION *session, int idx) { return CRYPTO_get_ex_data(&session->ex_data, idx); } /* Even with SSLv2, we have 16 bytes (128 bits) of session ID space. * SSLv3/TLSv1 has 32 bytes (256 bits). 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 RAND 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 ... */ static int def_generate_session_id(const SSL *ssl, uint8_t *id, unsigned *id_len) { static const unsigned kMaxAttempts = 10; unsigned retry = 0; do { if (!RAND_bytes(id, *id_len)) { return 0; } } while (SSL_has_matching_session_id(ssl, id, *id_len) && (++retry < kMaxAttempts)); if (retry < kMaxAttempts) { 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 (s->mode & SSL_MODE_NO_SESSION_CREATION) { OPENSSL_PUT_ERROR(SSL, SSL_R_SESSION_MAY_NOT_BE_CREATED); return 0; } ss = SSL_SESSION_new(); if (ss == NULL) { return 0; } /* If the context has a default timeout, use it over the default. */ if (s->initial_ctx->session_timeout != 0) { ss->timeout = s->initial_ctx->session_timeout; } SSL_SESSION_free(s->session); s->session = NULL; if (session) { if (s->version == SSL3_VERSION || s->version == TLS1_VERSION || s->version == TLS1_1_VERSION || s->version == TLS1_2_VERSION || s->version == DTLS1_VERSION || s->version == DTLS1_2_VERSION) { ss->ssl_version = s->version; ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH; } else { OPENSSL_PUT_ERROR(SSL, SSL_R_UNSUPPORTED_SSL_VERSION); SSL_SESSION_free(ss); return 0; } /* If RFC4507 ticket use empty session ID */ if (s->tlsext_ticket_expected) { ss->session_id_length = 0; goto sess_id_done; } /* Choose which callback will set the session ID */ if (s->generate_session_id) { cb = s->generate_session_id; } else if (s->initial_ctx->generate_session_id) { cb = s->initial_ctx->generate_session_id; } /* Choose a session ID */ tmp = ss->session_id_length; if (!cb(s, ss->session_id, &tmp)) { /* The callback failed */ OPENSSL_PUT_ERROR(SSL, 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 */ OPENSSL_PUT_ERROR(SSL, 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)) { OPENSSL_PUT_ERROR(SSL, SSL_R_SSL_SESSION_ID_CONFLICT); SSL_SESSION_free(ss); return 0; } sess_id_done: if (s->tlsext_hostname) { ss->tlsext_hostname = BUF_strdup(s->tlsext_hostname); if (ss->tlsext_hostname == NULL) { OPENSSL_PUT_ERROR(SSL, 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)) { OPENSSL_PUT_ERROR(SSL, 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_lookup_session looks up |session_id| in the session cache and sets * |*out_session| to an |SSL_SESSION| object if found. The caller takes * ownership of the result. */ static enum ssl_session_result_t ssl_lookup_session( SSL *ssl, SSL_SESSION **out_session, const uint8_t *session_id, size_t session_id_len) { *out_session = NULL; if (session_id_len == 0 || session_id_len > SSL_MAX_SSL_SESSION_ID_LENGTH) { return ssl_session_success; } SSL_SESSION *session; /* Try the internal cache, if it exists. */ if (!(ssl->initial_ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_LOOKUP)) { SSL_SESSION data; data.ssl_version = ssl->version; data.session_id_length = session_id_len; memcpy(data.session_id, session_id, session_id_len); CRYPTO_MUTEX_lock_read(&ssl->initial_ctx->lock); session = lh_SSL_SESSION_retrieve(ssl->initial_ctx->sessions, &data); if (session != NULL) { SSL_SESSION_up_ref(session); } CRYPTO_MUTEX_unlock(&ssl->initial_ctx->lock); if (session != NULL) { *out_session = session; return ssl_session_success; } } /* Fall back to the external cache, if it exists. */ if (ssl->initial_ctx->get_session_cb == NULL) { return ssl_session_success; } int copy = 1; session = ssl->initial_ctx->get_session_cb(ssl, (uint8_t *)session_id, session_id_len, ©); if (session == NULL) { return ssl_session_success; } if (session == SSL_magic_pending_session_ptr()) { return ssl_session_retry; } /* 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(session); } /* Add the externally cached session to the internal cache if necessary. */ if (!(ssl->initial_ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_STORE)) { SSL_CTX_add_session(ssl->initial_ctx, session); } *out_session = session; return ssl_session_success; } enum ssl_session_result_t ssl_get_prev_session( SSL *ssl, SSL_SESSION **out_session, int *out_send_ticket, const struct ssl_early_callback_ctx *ctx) { /* This is used only by servers. */ assert(ssl->server); SSL_SESSION *session = NULL; int send_ticket = 0; /* If tickets are disabled, always behave as if no tickets are present. */ const uint8_t *ticket = NULL; size_t ticket_len = 0; const int tickets_supported = !(SSL_get_options(ssl) & SSL_OP_NO_TICKET) && ssl->version > SSL3_VERSION && SSL_early_callback_ctx_extension_get(ctx, TLSEXT_TYPE_session_ticket, &ticket, &ticket_len); if (tickets_supported) { if (!tls_process_ticket(ssl, &session, &send_ticket, ticket, ticket_len, ctx->session_id, ctx->session_id_len)) { return ssl_session_error; } } else { /* The client does not support session tickets, so the session ID should be * used instead. */ enum ssl_session_result_t lookup_ret = ssl_lookup_session( ssl, &session, ctx->session_id, ctx->session_id_len); if (lookup_ret != ssl_session_success) { return lookup_ret; } } if (session == NULL || session->sid_ctx_length != ssl->sid_ctx_length || memcmp(session->sid_ctx, ssl->sid_ctx, ssl->sid_ctx_length) != 0) { goto no_session; } if ((ssl->verify_mode & SSL_VERIFY_PEER) && ssl->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). */ OPENSSL_PUT_ERROR(SSL, SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED); goto fatal_error; } if (session->timeout < (long)(time(NULL) - session->time)) { if (!tickets_supported) { /* The session was from the cache, so remove it. */ SSL_CTX_remove_session(ssl->initial_ctx, session); } goto no_session; } *out_session = session; *out_send_ticket = send_ticket; return ssl_session_success; fatal_error: SSL_SESSION_free(session); return ssl_session_error; no_session: *out_session = NULL; *out_send_ticket = tickets_supported; SSL_SESSION_free(session); return ssl_session_success; } int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *session) { int ret = 0; SSL_SESSION *old_session; /* 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(session); /* If |session| is in already in cache, we take back the increment later. */ CRYPTO_MUTEX_lock_write(&ctx->lock); if (!lh_SSL_SESSION_insert(ctx->sessions, &old_session, session)) { CRYPTO_MUTEX_unlock(&ctx->lock); SSL_SESSION_free(session); return 0; } /* |old_session| != NULL iff we already had a session with the given session * ID. In this case, |old_session| == |session| should hold (then we did not * really modify |ctx->sessions|), or we're in trouble. */ if (old_session != NULL && old_session != session) { /* We *are* in trouble ... */ SSL_SESSION_list_remove(ctx, old_session); SSL_SESSION_free(old_session); /* ... 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). */ old_session = NULL; } /* Put at the head of the queue unless it is already in the cache. */ if (old_session == NULL) { SSL_SESSION_list_add(ctx, session); } if (old_session != NULL) { /* Existing cache entry -- decrement previously incremented reference count * because it already takes into account the cache. */ SSL_SESSION_free(old_session); /* |old_session| == |session| */ 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; } } } } CRYPTO_MUTEX_unlock(&ctx->lock); return ret; } int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *session) { return remove_session_lock(ctx, session, 1); } static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *session, int lock) { int ret = 0; if (session != NULL && session->session_id_length != 0) { if (lock) { CRYPTO_MUTEX_lock_write(&ctx->lock); } SSL_SESSION *found_session = lh_SSL_SESSION_retrieve(ctx->sessions, session); if (found_session == session) { ret = 1; found_session = lh_SSL_SESSION_delete(ctx->sessions, session); SSL_SESSION_list_remove(ctx, session); } if (lock) { CRYPTO_MUTEX_unlock(&ctx->lock); } if (ret) { found_session->not_resumable = 1; if (ctx->remove_session_cb != NULL) { ctx->remove_session_cb(ctx, found_session); } SSL_SESSION_free(found_session); } } return ret; } int SSL_set_session(SSL *ssl, SSL_SESSION *session) { if (ssl->session == session) { return 1; } SSL_SESSION_free(ssl->session); ssl->session = session; if (session != NULL) { SSL_SESSION_up_ref(session); ssl->verify_result = session->verify_result; } return 1; } long SSL_CTX_set_timeout(SSL_CTX *ctx, long timeout) { if (ctx == NULL) { return 0; } long old_timeout = ctx->session_timeout; ctx->session_timeout = timeout; return old_timeout; } long SSL_CTX_get_timeout(const SSL_CTX *ctx) { if (ctx == NULL) { return 0; } return ctx->session_timeout; } typedef struct timeout_param_st { SSL_CTX *ctx; long time; LHASH_OF(SSL_SESSION) *cache; } TIMEOUT_PARAM; static void timeout_doall_arg(SSL_SESSION *session, void *void_param) { TIMEOUT_PARAM *param = void_param; if (param->time == 0 || param->time > (session->time + session->timeout)) { /* timeout */ /* The reason we don't call SSL_CTX_remove_session() is to * save on locking overhead */ (void) lh_SSL_SESSION_delete(param->cache, session); SSL_SESSION_list_remove(param->ctx, session); session->not_resumable = 1; if (param->ctx->remove_session_cb != NULL) { param->ctx->remove_session_cb(param->ctx, session); } SSL_SESSION_free(session); } } void SSL_CTX_flush_sessions(SSL_CTX *ctx, long time) { TIMEOUT_PARAM tp; tp.ctx = ctx; tp.cache = ctx->sessions; if (tp.cache == NULL) { return; } tp.time = time; CRYPTO_MUTEX_lock_write(&ctx->lock); lh_SSL_SESSION_doall_arg(tp.cache, timeout_doall_arg, &tp); CRYPTO_MUTEX_unlock(&ctx->lock); } int ssl_clear_bad_session(SSL *s) { if (s->session != NULL && !(s->shutdown & SSL_SENT_SHUTDOWN) && !SSL_in_init(s)) { SSL_CTX_remove_session(s->ctx, s->session); return 1; } return 0; } /* locked by SSL_CTX in the calling function */ static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *session) { if (session->next == NULL || session->prev == NULL) { return; } if (session->next == (SSL_SESSION *)&ctx->session_cache_tail) { /* last element in list */ if (session->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 = session->prev; session->prev->next = (SSL_SESSION *)&(ctx->session_cache_tail); } } else { if (session->prev == (SSL_SESSION *)&ctx->session_cache_head) { /* first element in list */ ctx->session_cache_head = session->next; session->next->prev = (SSL_SESSION *)&(ctx->session_cache_head); } else { /* middle of list */ session->next->prev = session->prev; session->prev->next = session->next; } } session->prev = session->next = NULL; } static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *session) { if (session->next != NULL && session->prev != NULL) { SSL_SESSION_list_remove(ctx, session); } if (ctx->session_cache_head == NULL) { ctx->session_cache_head = session; ctx->session_cache_tail = session; session->prev = (SSL_SESSION *)&(ctx->session_cache_head); session->next = (SSL_SESSION *)&(ctx->session_cache_tail); } else { session->next = ctx->session_cache_head; session->next->prev = session; session->prev = (SSL_SESSION *)&(ctx->session_cache_head); ctx->session_cache_head = session; } } void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx, int (*cb)(SSL *ssl, SSL_SESSION *session)) { ctx->new_session_cb = cb; } int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx))(SSL *ssl, SSL_SESSION *session) { return ctx->new_session_cb; } void SSL_CTX_sess_set_remove_cb( SSL_CTX *ctx, void (*cb)(SSL_CTX *ctx, SSL_SESSION *session)) { ctx->remove_session_cb = cb; } void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx))(SSL_CTX *ctx, SSL_SESSION *session) { return ctx->remove_session_cb; } void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx, SSL_SESSION *(*cb)(SSL *ssl, uint8_t *id, int id_len, int *out_copy)) { ctx->get_session_cb = cb; } SSL_SESSION *(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx))( SSL *ssl, uint8_t *id, int id_len, int *out_copy) { return ctx->get_session_cb; } void SSL_CTX_set_info_callback( SSL_CTX *ctx, void (*cb)(const SSL *ssl, int type, int value)) { ctx->info_callback = cb; } void (*SSL_CTX_get_info_callback(SSL_CTX *ctx))(const SSL *ssl, int type, int value) { return ctx->info_callback; } void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx, int (*cb)(SSL *ssl, X509 **out_x509, EVP_PKEY **out_pkey)) { ctx->client_cert_cb = cb; } int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx))(SSL *ssl, X509 **out_x509, EVP_PKEY **out_pkey) { return ctx->client_cert_cb; } void SSL_CTX_set_channel_id_cb(SSL_CTX *ctx, void (*cb)(SSL *ssl, EVP_PKEY **pkey)) { ctx->channel_id_cb = cb; } void (*SSL_CTX_get_channel_id_cb(SSL_CTX *ctx))(SSL *ssl, EVP_PKEY **pkey) { return ctx->channel_id_cb; }