| /* 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 <stdio.h> |
| |
| #include <openssl/engine.h> |
| #include <openssl/err.h> |
| #include <openssl/lhash.h> |
| #include <openssl/mem.h> |
| #include <openssl/rand.h> |
| |
| #include "ssl_locl.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 char g_pending_session_magic; |
| |
| 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() |
| { |
| 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 */ |
| { |
| 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->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=60*5+4; /* 5 minute timeout by default */ |
| ss->time=(unsigned long)time(NULL); |
| ss->prev=NULL; |
| ss->next=NULL; |
| ss->tlsext_hostname = NULL; |
| #ifndef OPENSSL_NO_EC |
| ss->tlsext_ecpointformatlist_length = 0; |
| ss->tlsext_ecpointformatlist = NULL; |
| ss->tlsext_ellipticcurvelist_length = 0; |
| ss->tlsext_ellipticcurvelist = NULL; |
| #endif |
| CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data); |
| ss->psk_identity_hint=NULL; |
| ss->psk_identity=NULL; |
| return(ss); |
| } |
| |
| const unsigned char *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 ... */ |
| |
| #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_pseudo_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; |
| |
| if (s->session != NULL) |
| { |
| SSL_SESSION_free(s->session); |
| s->session=NULL; |
| } |
| |
| if (session) |
| { |
| if (s->version == SSL2_VERSION) |
| { |
| ss->ssl_version=SSL2_VERSION; |
| ss->session_id_length=SSL2_SSL_SESSION_ID_LENGTH; |
| } |
| else 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 == 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 |
| { |
| 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->session_ctx->generate_session_id) |
| cb = s->session_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); |
| } |
| /* If the session length was shrunk and we're SSLv2, pad it */ |
| if((tmp < ss->session_id_length) && (s->version == SSL2_VERSION)) |
| memset(ss->session_id + tmp, 0, ss->session_id_length - tmp); |
| else |
| 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; |
| } |
| } |
| if (s->psk_identity_hint) |
| { |
| ss->psk_identity_hint = BUF_strdup(s->psk_identity_hint); |
| if (ss->psk_identity_hint == NULL) |
| { |
| OPENSSL_PUT_ERROR(SSL, ssl_get_new_session, ERR_R_MALLOC_FAILURE); |
| 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->session_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=lh_SSL_SESSION_retrieve(s->session_ctx->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->stats.sess_miss++; |
| } |
| |
| if (try_session_cache && |
| ret == NULL && |
| s->session_ctx->get_session_cb != NULL) |
| { |
| int copy=1; |
| |
| if ((ret=s->session_ctx->get_session_cb(s,(unsigned char *) ctx->session_id,ctx->session_id_len,©))) |
| { |
| 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; |
| } |
| 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) |
| 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->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 |
| || 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->cipher == NULL) |
| { |
| /* The cipher id has a leading 0x03 to be removed (and then put |
| * back for the binary search) as a remnant of SSLv2 support. */ |
| ret->cipher = ssl3_get_cipher_by_value(ret->cipher_id & 0xffff); |
| if (ret->cipher == NULL) |
| 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; |
| } |
| |
| s->session_ctx->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->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); |
| 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; |
| else |
| ctx->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->sessions,c)) == c) |
| { |
| ret=1; |
| r=lh_SSL_SESSION_delete(ctx->sessions,c); |
| SSL_SESSION_list_remove(ctx,c); |
| } |
| |
| if(lck) 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); |
| } |
| } |
| 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); |
| #ifdef REF_PRINT |
| REF_PRINT("SSL_SESSION",ss); |
| #endif |
| if (i > 0) return; |
| #ifdef REF_CHECK |
| if (i < 0) |
| { |
| fprintf(stderr,"SSL_SESSION_free, bad reference count\n"); |
| abort(); /* ok */ |
| } |
| #endif |
| |
| CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data); |
| |
| OPENSSL_cleanse(ss->key_arg,sizeof ss->key_arg); |
| 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->ciphers != NULL) sk_SSL_CIPHER_free(ss->ciphers); |
| if (ss->tlsext_hostname != NULL) OPENSSL_free(ss->tlsext_hostname); |
| if (ss->tlsext_tick != NULL) OPENSSL_free(ss->tlsext_tick); |
| #ifndef OPENSSL_NO_EC |
| ss->tlsext_ecpointformatlist_length = 0; |
| if (ss->tlsext_ecpointformatlist != NULL) OPENSSL_free(ss->tlsext_ecpointformatlist); |
| ss->tlsext_ellipticcurvelist_length = 0; |
| if (ss->tlsext_ellipticcurvelist != NULL) OPENSSL_free(ss->tlsext_ellipticcurvelist); |
| #endif /* OPENSSL_NO_EC */ |
| if (ss->psk_identity_hint != NULL) |
| OPENSSL_free(ss->psk_identity_hint); |
| 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) |
| { |
| int ret=0; |
| const SSL_METHOD *meth; |
| |
| if (session != NULL) |
| { |
| meth=s->ctx->method->get_ssl_method(session->ssl_version); |
| if (meth == NULL) |
| meth=s->method->get_ssl_method(session->ssl_version); |
| if (meth == NULL) |
| { |
| OPENSSL_PUT_ERROR(SSL, SSL_set_session, 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); |
| } |
| |
| 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 unsigned char *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); |
| } |
| |
| 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->tls_session_secret_cb = tls_session_secret_cb; |
| s->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->tls_session_ticket_ext_cb = cb; |
| s->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) |
| { |
| if (s->tlsext_session_ticket) |
| { |
| OPENSSL_free(s->tlsext_session_ticket); |
| s->tlsext_session_ticket = NULL; |
| } |
| |
| s->tlsext_session_ticket = OPENSSL_malloc(sizeof(TLS_SESSION_TICKET_EXT) + ext_len); |
| if (!s->tlsext_session_ticket) |
| { |
| OPENSSL_PUT_ERROR(SSL, SSL_set_session_ticket_ext, ERR_R_MALLOC_FAILURE); |
| return 0; |
| } |
| |
| if (ext_data) |
| { |
| s->tlsext_session_ticket->length = ext_len; |
| s->tlsext_session_ticket->data = s->tlsext_session_ticket + 1; |
| memcpy(s->tlsext_session_ticket->data, ext_data, ext_len); |
| } |
| else |
| { |
| s->tlsext_session_ticket->length = 0; |
| s->tlsext_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_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_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->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, |
| 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, |
| 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; |
| } |
| |
| 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; |
| } |
| |
| /* TODO(davidben): |cookie| should be a const pointer. */ |
| void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx, |
| int (*cb)(SSL *ssl, unsigned char *cookie, unsigned int cookie_len)) |
| { |
| ctx->app_verify_cookie_cb=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) |