/* 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 "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 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_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) { 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->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; ss = (SSL_SESSION *)OPENSSL_malloc(sizeof(SSL_SESSION)); if (ss == NULL) { OPENSSL_PUT_ERROR(SSL, SSL_SESSION_new, ERR_R_MALLOC_FAILURE); return 0; } memset(ss, 0, sizeof(SSL_SESSION)); ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */ ss->references = 1; ss->timeout = SSL_DEFAULT_SESSION_TIMEOUT; ss->time = (unsigned long)time(NULL); CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data); return ss; } const uint8_t *SSL_SESSION_get_id(const SSL_SESSION *s, unsigned int *len) { if (len) { *len = s->session_id_length; } return s->session_id; } /* 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 int *id_len) { static const unsigned kMaxAttempts = 10; unsigned int 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_get_new_session, 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; } if (s->session != NULL) { 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_get_new_session, 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 */ CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); 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; } 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 */ OPENSSL_PUT_ERROR(SSL, 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 || tmp > ss->session_id_length) { /* The callback set an illegal length */ OPENSSL_PUT_ERROR(SSL, 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, ss->session_id_length)) { OPENSSL_PUT_ERROR(SSL, ssl_get_new_session, 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, 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)) { OPENSSL_PUT_ERROR(SSL, 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; return 1; } /* ssl_get_prev attempts to find an SSL_SESSION to be used to resume this * connection. It is only called by servers. * * ctx: contains the early callback context, which is the result of a * shallow parse of 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->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, const struct ssl_early_callback_ctx *ctx) { /* This is used only by servers. */ SSL_SESSION *ret = NULL; int fatal = 0; int try_session_cache = 1; int r; if (ctx->session_id_len > SSL_MAX_SSL_SESSION_ID_LENGTH) { goto err; } if (ctx->session_id_len == 0) { try_session_cache = 0; } r = tls1_process_ticket(s, ctx, &ret); /* sets s->tlsext_ticket_expected */ 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->initial_ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_LOOKUP)) { SSL_SESSION data; data.ssl_version = s->version; data.session_id_length = ctx->session_id_len; if (ctx->session_id_len == 0) { return 0; } memcpy(data.session_id, ctx->session_id, ctx->session_id_len); CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); ret = SSL_SESSION_up_ref(lh_SSL_SESSION_retrieve(s->initial_ctx->sessions, &data)); CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); } if (try_session_cache && ret == NULL && s->initial_ctx->get_session_cb != NULL) { int copy = 1; ret = s->initial_ctx->get_session_cb(s, (uint8_t *)ctx->session_id, ctx->session_id_len, ©); if (ret != NULL) { if (ret == SSL_magic_pending_session_ptr()) { /* This is a magic value which indicates that the callback needs to * unwind the stack and figure out the session asynchronously. */ return PENDING_SESSION; } /* 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->initial_ctx->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->initial_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 || 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). */ OPENSSL_PUT_ERROR(SSL, ssl_get_prev_session, SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED); fatal = 1; goto err; } if (ret->timeout < (long)(time(NULL) - ret->time)) { /* timeout */ if (try_session_cache) { /* session was from the cache, so remove it */ SSL_CTX_remove_session(s->initial_ctx, ret); } goto err; } 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->tlsext_ticket_expected = 1; } } if (fatal) { 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_w_lock(CRYPTO_LOCK_SSL_CTX); if (!lh_SSL_SESSION_insert(ctx->sessions, &s, c)) { return 0; } /* 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; } /* 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; } } } } 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 lock) { SSL_SESSION *r; int ret = 0; if (c != NULL && c->session_id_length != 0) { if (lock) { CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); } r = lh_SSL_SESSION_retrieve(ctx->sessions, c); if (r == c) { ret = 1; r = lh_SSL_SESSION_delete(ctx->sessions, c); SSL_SESSION_list_remove(ctx, c); } if (lock) { CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); } if (ret) { r->not_resumable = 1; if (ctx->remove_session_cb != NULL) { ctx->remove_session_cb(ctx, r); } SSL_SESSION_free(r); } } return ret; } SSL_SESSION *SSL_SESSION_up_ref(SSL_SESSION *session) { if (session) { CRYPTO_add(&session->references, 1, CRYPTO_LOCK_SSL_SESSION); } return session; } 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->ex_data); OPENSSL_cleanse(ss->master_key, sizeof ss->master_key); OPENSSL_cleanse(ss->session_id, sizeof ss->session_id); if (ss->sess_cert != NULL) { ssl_sess_cert_free(ss->sess_cert); } if (ss->peer != NULL) { X509_free(ss->peer); } if (ss->tlsext_hostname != NULL) { OPENSSL_free(ss->tlsext_hostname); } if (ss->tlsext_tick != NULL) { OPENSSL_free(ss->tlsext_tick); } if (ss->tlsext_signed_cert_timestamp_list != NULL) { OPENSSL_free(ss->tlsext_signed_cert_timestamp_list); } if (ss->ocsp_response != NULL) { OPENSSL_free(ss->ocsp_response); } if (ss->psk_identity != NULL) { OPENSSL_free(ss->psk_identity); } OPENSSL_cleanse(ss, sizeof(*ss)); OPENSSL_free(ss); } int SSL_set_session(SSL *s, SSL_SESSION *session) { if (s->session == session) { return 1; } if (s->session != NULL) { SSL_SESSION_free(s->session); } s->session = session; if (session != NULL) { SSL_SESSION_up_ref(session); s->verify_result = session->verify_result; } 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; } X509 *SSL_SESSION_get0_peer(SSL_SESSION *s) { return s->peer; } int SSL_SESSION_set1_id_context(SSL_SESSION *s, const uint8_t *sid_ctx, unsigned int sid_ctx_len) { if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { OPENSSL_PUT_ERROR(SSL, SSL_SESSION_set1_id_context, 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; } typedef struct timeout_param_st { SSL_CTX *ctx; long time; LHASH_OF(SSL_SESSION) * cache; } TIMEOUT_PARAM; static void timeout_doall_arg(SSL_SESSION *sess, void *void_param) { TIMEOUT_PARAM *param = void_param; if (param->time == 0 || param->time > (sess->time + sess->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, sess); SSL_SESSION_list_remove(param->ctx, sess); sess->not_resumable = 1; if (param->ctx->remove_session_cb != NULL) { param->ctx->remove_session_cb(param->ctx, sess); } SSL_SESSION_free(sess); } } void SSL_CTX_flush_sessions(SSL_CTX *s, long t) { TIMEOUT_PARAM tp; tp.ctx = s; tp.cache = s->sessions; if (tp.cache == NULL) { return; } tp.time = t; CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); lh_SSL_SESSION_doall_arg(tp.cache, timeout_doall_arg, &tp); CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); } 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 *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, uint8_t *data, int len, int *copy)) { ctx->get_session_cb = cb; } SSL_SESSION *(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx))(SSL *ssl, uint8_t *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; } 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; } IMPLEMENT_PEM_rw(SSL_SESSION, SSL_SESSION, PEM_STRING_SSL_SESSION, SSL_SESSION)