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1221 lines
33 KiB
C
Executable File
1221 lines
33 KiB
C
Executable File
/* $OpenBSD: ssl_sess.c,v 1.100 2020/09/19 09:56:35 tb Exp $ */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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/* ====================================================================
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* Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* openssl-core@openssl.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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/* ====================================================================
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* Copyright 2005 Nokia. All rights reserved.
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*
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* The portions of the attached software ("Contribution") is developed by
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* Nokia Corporation and is licensed pursuant to the OpenSSL open source
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* license.
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*
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* The Contribution, originally written by Mika Kousa and Pasi Eronen of
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* Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
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* support (see RFC 4279) to OpenSSL.
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*
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* No patent licenses or other rights except those expressly stated in
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* the OpenSSL open source license shall be deemed granted or received
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* expressly, by implication, estoppel, or otherwise.
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*
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* No assurances are provided by Nokia that the Contribution does not
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* infringe the patent or other intellectual property rights of any third
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* party or that the license provides you with all the necessary rights
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* to make use of the Contribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
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* ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
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* SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
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* OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
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* OTHERWISE.
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*/
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#include <openssl/lhash.h>
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#ifndef OPENSSL_NO_ENGINE
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#include <openssl/engine.h>
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#endif
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#include "ssl_locl.h"
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static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s);
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static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s);
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static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck);
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/* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */
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SSL_SESSION *
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SSL_get_session(const SSL *ssl)
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{
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return (ssl->session);
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}
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/* variant of SSL_get_session: caller really gets something */
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SSL_SESSION *
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SSL_get1_session(SSL *ssl)
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{
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SSL_SESSION *sess;
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/*
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* Need to lock this all up rather than just use CRYPTO_add so that
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* somebody doesn't free ssl->session between when we check it's
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* non-null and when we up the reference count.
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*/
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CRYPTO_w_lock(CRYPTO_LOCK_SSL_SESSION);
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sess = ssl->session;
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if (sess)
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sess->references++;
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CRYPTO_w_unlock(CRYPTO_LOCK_SSL_SESSION);
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return (sess);
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}
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int
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SSL_SESSION_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
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CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
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{
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return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_SESSION,
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argl, argp, new_func, dup_func, free_func);
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}
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int
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SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg)
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{
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return (CRYPTO_set_ex_data(&s->internal->ex_data, idx, arg));
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}
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void *
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SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx)
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{
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return (CRYPTO_get_ex_data(&s->internal->ex_data, idx));
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}
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uint32_t
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SSL_SESSION_get_max_early_data(const SSL_SESSION *s)
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{
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return 0;
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}
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int
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SSL_SESSION_set_max_early_data(SSL_SESSION *s, uint32_t max_early_data)
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{
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return 1;
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}
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SSL_SESSION *
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SSL_SESSION_new(void)
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{
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SSL_SESSION *ss;
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if (!OPENSSL_init_ssl(0, NULL)) {
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SSLerrorx(SSL_R_LIBRARY_BUG);
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return(NULL);
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}
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if ((ss = calloc(1, sizeof(*ss))) == NULL) {
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SSLerrorx(ERR_R_MALLOC_FAILURE);
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return (NULL);
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}
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if ((ss->internal = calloc(1, sizeof(*ss->internal))) == NULL) {
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free(ss);
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SSLerrorx(ERR_R_MALLOC_FAILURE);
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return (NULL);
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}
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ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */
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ss->references = 1;
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ss->timeout=60*5+4; /* 5 minute timeout by default */
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ss->time = time(NULL);
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ss->internal->prev = NULL;
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ss->internal->next = NULL;
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ss->tlsext_hostname = NULL;
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ss->internal->tlsext_ecpointformatlist_length = 0;
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ss->internal->tlsext_ecpointformatlist = NULL;
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ss->internal->tlsext_supportedgroups_length = 0;
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ss->internal->tlsext_supportedgroups = NULL;
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CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->internal->ex_data);
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return (ss);
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}
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const unsigned char *
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SSL_SESSION_get_id(const SSL_SESSION *ss, unsigned int *len)
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{
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if (len != NULL)
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*len = ss->session_id_length;
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return ss->session_id;
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}
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const unsigned char *
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SSL_SESSION_get0_id_context(const SSL_SESSION *ss, unsigned int *len)
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{
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if (len != NULL)
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*len = (unsigned int)ss->sid_ctx_length;
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return ss->sid_ctx;
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}
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unsigned int
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SSL_SESSION_get_compress_id(const SSL_SESSION *ss)
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{
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return 0;
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}
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unsigned long
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SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION *s)
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{
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return s->tlsext_tick_lifetime_hint;
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}
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int
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SSL_SESSION_has_ticket(const SSL_SESSION *s)
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{
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return (s->tlsext_ticklen > 0) ? 1 : 0;
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}
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/*
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* SSLv3/TLSv1 has 32 bytes (256 bits) of session ID space. As such, filling
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* the ID with random gunk repeatedly until we have no conflict is going to
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* complete in one iteration pretty much "most" of the time (btw:
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* understatement). So, if it takes us 10 iterations and we still can't avoid
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* a conflict - well that's a reasonable point to call it quits. Either the
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* arc4random code is broken or someone is trying to open roughly very close to
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* 2^128 (or 2^256) SSL sessions to our server. How you might store that many
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* sessions is perhaps a more interesting question...
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*/
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#define MAX_SESS_ID_ATTEMPTS 10
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static int
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def_generate_session_id(const SSL *ssl, unsigned char *id, unsigned int *id_len)
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{
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unsigned int retry = 0;
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do {
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arc4random_buf(id, *id_len);
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} while (SSL_has_matching_session_id(ssl, id, *id_len) &&
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(++retry < MAX_SESS_ID_ATTEMPTS));
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if (retry < MAX_SESS_ID_ATTEMPTS)
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return 1;
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/* else - woops a session_id match */
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/* XXX We should also check the external cache --
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* but the probability of a collision is negligible, and
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* we could not prevent the concurrent creation of sessions
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* with identical IDs since we currently don't have means
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* to atomically check whether a session ID already exists
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* and make a reservation for it if it does not
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* (this problem applies to the internal cache as well).
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*/
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return 0;
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}
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int
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ssl_get_new_session(SSL *s, int session)
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{
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unsigned int tmp;
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SSL_SESSION *ss = NULL;
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GEN_SESSION_CB cb = def_generate_session_id;
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/* This gets used by clients and servers. */
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if ((ss = SSL_SESSION_new()) == NULL)
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return (0);
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/* If the context has a default timeout, use it */
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if (s->session_ctx->session_timeout == 0)
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ss->timeout = SSL_get_default_timeout(s);
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else
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ss->timeout = s->session_ctx->session_timeout;
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if (s->session != NULL) {
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SSL_SESSION_free(s->session);
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s->session = NULL;
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}
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if (session) {
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switch (s->version) {
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case TLS1_VERSION:
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case TLS1_1_VERSION:
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case TLS1_2_VERSION:
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case DTLS1_VERSION:
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ss->ssl_version = s->version;
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ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH;
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break;
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default:
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SSLerror(s, SSL_R_UNSUPPORTED_SSL_VERSION);
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SSL_SESSION_free(ss);
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return (0);
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}
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/* If RFC4507 ticket use empty session ID. */
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if (s->internal->tlsext_ticket_expected) {
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ss->session_id_length = 0;
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goto sess_id_done;
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}
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/* Choose which callback will set the session ID. */
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CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
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if (s->internal->generate_session_id)
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cb = s->internal->generate_session_id;
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else if (s->session_ctx->internal->generate_session_id)
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cb = s->session_ctx->internal->generate_session_id;
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CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
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/* Choose a session ID. */
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tmp = ss->session_id_length;
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if (!cb(s, ss->session_id, &tmp)) {
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/* The callback failed */
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SSLerror(s, SSL_R_SSL_SESSION_ID_CALLBACK_FAILED);
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SSL_SESSION_free(ss);
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return (0);
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}
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/*
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* Don't allow the callback to set the session length to zero.
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* nor set it higher than it was.
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*/
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if (!tmp || (tmp > ss->session_id_length)) {
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/* The callback set an illegal length */
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SSLerror(s, SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH);
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SSL_SESSION_free(ss);
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return (0);
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}
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ss->session_id_length = tmp;
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/* Finally, check for a conflict. */
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if (SSL_has_matching_session_id(s, ss->session_id,
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ss->session_id_length)) {
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SSLerror(s, SSL_R_SSL_SESSION_ID_CONFLICT);
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SSL_SESSION_free(ss);
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return (0);
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}
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sess_id_done:
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if (s->tlsext_hostname) {
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ss->tlsext_hostname = strdup(s->tlsext_hostname);
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if (ss->tlsext_hostname == NULL) {
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SSLerror(s, ERR_R_INTERNAL_ERROR);
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SSL_SESSION_free(ss);
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return 0;
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}
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}
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} else {
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ss->session_id_length = 0;
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}
|
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|
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if (s->sid_ctx_length > sizeof ss->sid_ctx) {
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SSLerror(s, ERR_R_INTERNAL_ERROR);
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SSL_SESSION_free(ss);
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return 0;
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}
|
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|
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memcpy(ss->sid_ctx, s->sid_ctx, s->sid_ctx_length);
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ss->sid_ctx_length = s->sid_ctx_length;
|
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s->session = ss;
|
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ss->ssl_version = s->version;
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ss->verify_result = X509_V_OK;
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|
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return (1);
|
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}
|
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|
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static SSL_SESSION *
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ssl_session_from_cache(SSL *s, CBS *session_id)
|
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{
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SSL_SESSION *sess;
|
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SSL_SESSION data;
|
|
|
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if ((s->session_ctx->internal->session_cache_mode &
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SSL_SESS_CACHE_NO_INTERNAL_LOOKUP))
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return NULL;
|
|
|
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memset(&data, 0, sizeof(data));
|
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|
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data.ssl_version = s->version;
|
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data.session_id_length = CBS_len(session_id);
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memcpy(data.session_id, CBS_data(session_id), CBS_len(session_id));
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|
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CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
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sess = lh_SSL_SESSION_retrieve(s->session_ctx->internal->sessions, &data);
|
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if (sess != NULL)
|
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CRYPTO_add(&sess->references, 1, CRYPTO_LOCK_SSL_SESSION);
|
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CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
|
|
|
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if (sess == NULL)
|
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s->session_ctx->internal->stats.sess_miss++;
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|
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return sess;
|
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}
|
|
|
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static SSL_SESSION *
|
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ssl_session_from_callback(SSL *s, CBS *session_id)
|
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{
|
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SSL_SESSION *sess;
|
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int copy;
|
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|
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if (s->session_ctx->internal->get_session_cb == NULL)
|
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return NULL;
|
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|
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copy = 1;
|
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if ((sess = s->session_ctx->internal->get_session_cb(s,
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CBS_data(session_id), CBS_len(session_id), ©)) == NULL)
|
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return NULL;
|
|
/*
|
|
* The copy handler may have set copy == 0 to indicate that the session
|
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* structures are shared between threads and that it handles the
|
|
* reference count itself. If it didn't set copy to zero, we must
|
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* increment the reference count.
|
|
*/
|
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if (copy)
|
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CRYPTO_add(&sess->references, 1, CRYPTO_LOCK_SSL_SESSION);
|
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|
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s->session_ctx->internal->stats.sess_cb_hit++;
|
|
|
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/* Add the externally cached session to the internal cache as well. */
|
|
if (!(s->session_ctx->internal->session_cache_mode &
|
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SSL_SESS_CACHE_NO_INTERNAL_STORE)) {
|
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/*
|
|
* The following should not return 1,
|
|
* otherwise, things are very strange.
|
|
*/
|
|
SSL_CTX_add_session(s->session_ctx, sess);
|
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}
|
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|
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return sess;
|
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}
|
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|
|
static SSL_SESSION *
|
|
ssl_session_by_id(SSL *s, CBS *session_id)
|
|
{
|
|
SSL_SESSION *sess;
|
|
|
|
if (CBS_len(session_id) == 0)
|
|
return NULL;
|
|
|
|
if ((sess = ssl_session_from_cache(s, session_id)) == NULL)
|
|
sess = ssl_session_from_callback(s, session_id);
|
|
|
|
return sess;
|
|
}
|
|
|
|
/*
|
|
* ssl_get_prev_session attempts to find an SSL_SESSION to be used to resume
|
|
* this connection. It is only called by servers.
|
|
*
|
|
* session_id: points at the session ID in the ClientHello. This code will
|
|
* read past the end of this in order to parse out the session ticket
|
|
* extension, if any.
|
|
* ext_block: a CBS for the ClientHello extensions block.
|
|
* alert: alert that the caller should send in case of failure.
|
|
*
|
|
* 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.
|
|
* - For both new and resumed sessions, s->internal->tlsext_ticket_expected
|
|
* indicates whether the server should issue a new session ticket or not.
|
|
*/
|
|
int
|
|
ssl_get_prev_session(SSL *s, CBS *session_id, CBS *ext_block, int *alert)
|
|
{
|
|
SSL_SESSION *sess = NULL;
|
|
size_t session_id_len;
|
|
int alert_desc = SSL_AD_INTERNAL_ERROR, fatal = 0;
|
|
int ticket_decrypted = 0;
|
|
|
|
/* This is used only by servers. */
|
|
|
|
if (CBS_len(session_id) > SSL_MAX_SSL_SESSION_ID_LENGTH)
|
|
goto err;
|
|
|
|
/* Sets s->internal->tlsext_ticket_expected. */
|
|
switch (tls1_process_ticket(s, ext_block, &alert_desc, &sess)) {
|
|
case TLS1_TICKET_FATAL_ERROR:
|
|
fatal = 1;
|
|
goto err;
|
|
case TLS1_TICKET_NONE:
|
|
case TLS1_TICKET_EMPTY:
|
|
if ((sess = ssl_session_by_id(s, session_id)) == NULL)
|
|
goto err;
|
|
break;
|
|
case TLS1_TICKET_NOT_DECRYPTED:
|
|
goto err;
|
|
case TLS1_TICKET_DECRYPTED:
|
|
ticket_decrypted = 1;
|
|
|
|
/*
|
|
* The session ID is used by some clients to detect that the
|
|
* ticket has been accepted so we copy it into sess.
|
|
*/
|
|
if (!CBS_write_bytes(session_id, sess->session_id,
|
|
sizeof(sess->session_id), &session_id_len)) {
|
|
fatal = 1;
|
|
goto err;
|
|
}
|
|
sess->session_id_length = (unsigned int)session_id_len;
|
|
break;
|
|
default:
|
|
SSLerror(s, ERR_R_INTERNAL_ERROR);
|
|
fatal = 1;
|
|
goto err;
|
|
}
|
|
|
|
/* Now sess is non-NULL and we own one of its reference counts. */
|
|
|
|
if (sess->sid_ctx_length != s->sid_ctx_length ||
|
|
timingsafe_memcmp(sess->sid_ctx, s->sid_ctx,
|
|
sess->sid_ctx_length) != 0) {
|
|
/*
|
|
* We have the session requested by the client, but we don't
|
|
* want to use it in this context. Treat it like a cache miss.
|
|
*/
|
|
goto err;
|
|
}
|
|
|
|
if ((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0) {
|
|
/*
|
|
* We can't be sure if this session is being used out of
|
|
* context, which is especially important for SSL_VERIFY_PEER.
|
|
* The application should have used
|
|
* SSL[_CTX]_set_session_id_context.
|
|
*
|
|
* For this error case, we generate an error instead of treating
|
|
* the event like a cache miss (otherwise it would be easy for
|
|
* applications to effectively disable the session cache by
|
|
* accident without anyone noticing).
|
|
*/
|
|
SSLerror(s, SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED);
|
|
fatal = 1;
|
|
goto err;
|
|
}
|
|
|
|
if (sess->cipher == NULL) {
|
|
sess->cipher = ssl3_get_cipher_by_id(sess->cipher_id);
|
|
if (sess->cipher == NULL)
|
|
goto err;
|
|
}
|
|
|
|
if (sess->timeout < (time(NULL) - sess->time)) {
|
|
s->session_ctx->internal->stats.sess_timeout++;
|
|
if (!ticket_decrypted) {
|
|
/* The session was from the cache, so remove it. */
|
|
SSL_CTX_remove_session(s->session_ctx, sess);
|
|
}
|
|
goto err;
|
|
}
|
|
|
|
s->session_ctx->internal->stats.sess_hit++;
|
|
|
|
SSL_SESSION_free(s->session);
|
|
s->session = sess;
|
|
s->verify_result = s->session->verify_result;
|
|
|
|
return 1;
|
|
|
|
err:
|
|
SSL_SESSION_free(sess);
|
|
if (ticket_decrypted) {
|
|
/*
|
|
* The session was from a ticket. Issue a ticket for the new
|
|
* session.
|
|
*/
|
|
s->internal->tlsext_ticket_expected = 1;
|
|
}
|
|
if (fatal) {
|
|
*alert = alert_desc;
|
|
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.
|
|
*/
|
|
CRYPTO_add(&c->references, 1, CRYPTO_LOCK_SSL_SESSION);
|
|
|
|
/*
|
|
* If session c is in already in cache, we take back the increment
|
|
* later.
|
|
*/
|
|
CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
|
|
s = lh_SSL_SESSION_insert(ctx->internal->sessions, c);
|
|
|
|
/*
|
|
* s != NULL iff we already had a session with the given PID.
|
|
* In this case, s == c should hold (then we did not really modify
|
|
* ctx->internal->sessions), or we're in trouble.
|
|
*/
|
|
if (s != NULL && s != c) {
|
|
/* We *are* in trouble ... */
|
|
SSL_SESSION_list_remove(ctx, s);
|
|
SSL_SESSION_free(s);
|
|
/*
|
|
* ... so pretend the other session did not exist in cache
|
|
* (we cannot handle two SSL_SESSION structures with identical
|
|
* session ID in the same cache, which could happen e.g. when
|
|
* two threads concurrently obtain the same session from an
|
|
* external cache).
|
|
*/
|
|
s = NULL;
|
|
}
|
|
|
|
/* Put at the head of the queue unless it is already in the cache */
|
|
if (s == NULL)
|
|
SSL_SESSION_list_add(ctx, c);
|
|
|
|
if (s != NULL) {
|
|
/*
|
|
* existing cache entry -- decrement previously incremented
|
|
* reference count because it already takes into account the
|
|
* cache.
|
|
*/
|
|
SSL_SESSION_free(s); /* s == c */
|
|
ret = 0;
|
|
} else {
|
|
/*
|
|
* New cache entry -- remove old ones if cache has become
|
|
* too large.
|
|
*/
|
|
|
|
ret = 1;
|
|
|
|
if (SSL_CTX_sess_get_cache_size(ctx) > 0) {
|
|
while (SSL_CTX_sess_number(ctx) >
|
|
SSL_CTX_sess_get_cache_size(ctx)) {
|
|
if (!remove_session_lock(ctx,
|
|
ctx->internal->session_cache_tail, 0))
|
|
break;
|
|
else
|
|
ctx->internal->stats.sess_cache_full++;
|
|
}
|
|
}
|
|
}
|
|
CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
|
|
return (ret);
|
|
}
|
|
|
|
int
|
|
SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c)
|
|
{
|
|
return remove_session_lock(ctx, c, 1);
|
|
}
|
|
|
|
static int
|
|
remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck)
|
|
{
|
|
SSL_SESSION *r;
|
|
int ret = 0;
|
|
|
|
if ((c != NULL) && (c->session_id_length != 0)) {
|
|
if (lck)
|
|
CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
|
|
if ((r = lh_SSL_SESSION_retrieve(ctx->internal->sessions, c)) == c) {
|
|
ret = 1;
|
|
r = lh_SSL_SESSION_delete(ctx->internal->sessions, c);
|
|
SSL_SESSION_list_remove(ctx, c);
|
|
}
|
|
if (lck)
|
|
CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
|
|
|
|
if (ret) {
|
|
r->internal->not_resumable = 1;
|
|
if (ctx->internal->remove_session_cb != NULL)
|
|
ctx->internal->remove_session_cb(ctx, r);
|
|
SSL_SESSION_free(r);
|
|
}
|
|
} else
|
|
ret = 0;
|
|
return (ret);
|
|
}
|
|
|
|
void
|
|
SSL_SESSION_free(SSL_SESSION *ss)
|
|
{
|
|
int i;
|
|
|
|
if (ss == NULL)
|
|
return;
|
|
|
|
i = CRYPTO_add(&ss->references, -1, CRYPTO_LOCK_SSL_SESSION);
|
|
if (i > 0)
|
|
return;
|
|
|
|
CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->internal->ex_data);
|
|
|
|
explicit_bzero(ss->master_key, sizeof ss->master_key);
|
|
explicit_bzero(ss->session_id, sizeof ss->session_id);
|
|
|
|
ssl_sess_cert_free(ss->internal->sess_cert);
|
|
|
|
X509_free(ss->peer);
|
|
|
|
sk_SSL_CIPHER_free(ss->ciphers);
|
|
|
|
free(ss->tlsext_hostname);
|
|
free(ss->tlsext_tick);
|
|
free(ss->internal->tlsext_ecpointformatlist);
|
|
free(ss->internal->tlsext_supportedgroups);
|
|
|
|
freezero(ss->internal, sizeof(*ss->internal));
|
|
freezero(ss, sizeof(*ss));
|
|
}
|
|
|
|
int
|
|
SSL_SESSION_up_ref(SSL_SESSION *ss)
|
|
{
|
|
int refs = CRYPTO_add(&ss->references, 1, CRYPTO_LOCK_SSL_SESSION);
|
|
return (refs > 1) ? 1 : 0;
|
|
}
|
|
|
|
int
|
|
SSL_set_session(SSL *s, SSL_SESSION *session)
|
|
{
|
|
const SSL_METHOD *method;
|
|
|
|
if (session == NULL) {
|
|
SSL_SESSION_free(s->session);
|
|
s->session = NULL;
|
|
|
|
return SSL_set_ssl_method(s, s->ctx->method);
|
|
}
|
|
|
|
if ((method = ssl_get_client_method(session->ssl_version)) == NULL) {
|
|
SSLerror(s, SSL_R_UNABLE_TO_FIND_SSL_METHOD);
|
|
return (0);
|
|
}
|
|
|
|
if (!SSL_set_ssl_method(s, method))
|
|
return (0);
|
|
|
|
CRYPTO_add(&session->references, 1, CRYPTO_LOCK_SSL_SESSION);
|
|
SSL_SESSION_free(s->session);
|
|
s->session = session;
|
|
s->verify_result = s->session->verify_result;
|
|
|
|
return (1);
|
|
}
|
|
|
|
size_t
|
|
SSL_SESSION_get_master_key(const SSL_SESSION *ss, unsigned char *out,
|
|
size_t max_out)
|
|
{
|
|
size_t len = ss->master_key_length;
|
|
|
|
if (out == NULL)
|
|
return len;
|
|
|
|
if (len > max_out)
|
|
len = max_out;
|
|
|
|
memcpy(out, ss->master_key, len);
|
|
|
|
return len;
|
|
}
|
|
|
|
long
|
|
SSL_SESSION_set_timeout(SSL_SESSION *s, long t)
|
|
{
|
|
if (s == NULL)
|
|
return (0);
|
|
s->timeout = t;
|
|
return (1);
|
|
}
|
|
|
|
long
|
|
SSL_SESSION_get_timeout(const SSL_SESSION *s)
|
|
{
|
|
if (s == NULL)
|
|
return (0);
|
|
return (s->timeout);
|
|
}
|
|
|
|
/* XXX 2038 */
|
|
long
|
|
SSL_SESSION_get_time(const SSL_SESSION *s)
|
|
{
|
|
if (s == NULL)
|
|
return (0);
|
|
return (s->time);
|
|
}
|
|
|
|
/* XXX 2038 */
|
|
long
|
|
SSL_SESSION_set_time(SSL_SESSION *s, long t)
|
|
{
|
|
if (s == NULL)
|
|
return (0);
|
|
s->time = t;
|
|
return (t);
|
|
}
|
|
|
|
int
|
|
SSL_SESSION_get_protocol_version(const SSL_SESSION *s)
|
|
{
|
|
return s->ssl_version;
|
|
}
|
|
|
|
X509 *
|
|
SSL_SESSION_get0_peer(SSL_SESSION *s)
|
|
{
|
|
return s->peer;
|
|
}
|
|
|
|
int
|
|
SSL_SESSION_set1_id(SSL_SESSION *s, const unsigned char *sid,
|
|
unsigned int sid_len)
|
|
{
|
|
if (sid_len > SSL_MAX_SSL_SESSION_ID_LENGTH) {
|
|
SSLerrorx(SSL_R_SSL_SESSION_ID_TOO_LONG);
|
|
return 0;
|
|
}
|
|
s->session_id_length = sid_len;
|
|
memmove(s->session_id, sid, sid_len);
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
SSL_SESSION_set1_id_context(SSL_SESSION *s, const unsigned char *sid_ctx,
|
|
unsigned int sid_ctx_len)
|
|
{
|
|
if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) {
|
|
SSLerrorx(SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
|
|
return 0;
|
|
}
|
|
s->sid_ctx_length = sid_ctx_len;
|
|
memcpy(s->sid_ctx, sid_ctx, sid_ctx_len);
|
|
|
|
return 1;
|
|
}
|
|
|
|
long
|
|
SSL_CTX_set_timeout(SSL_CTX *s, long t)
|
|
{
|
|
long l;
|
|
|
|
if (s == NULL)
|
|
return (0);
|
|
l = s->session_timeout;
|
|
s->session_timeout = t;
|
|
|
|
return (l);
|
|
}
|
|
|
|
long
|
|
SSL_CTX_get_timeout(const SSL_CTX *s)
|
|
{
|
|
if (s == NULL)
|
|
return (0);
|
|
return (s->session_timeout);
|
|
}
|
|
|
|
int
|
|
SSL_set_session_secret_cb(SSL *s, int (*tls_session_secret_cb)(SSL *s,
|
|
void *secret, int *secret_len, STACK_OF(SSL_CIPHER) *peer_ciphers,
|
|
SSL_CIPHER **cipher, void *arg), void *arg)
|
|
{
|
|
if (s == NULL)
|
|
return (0);
|
|
s->internal->tls_session_secret_cb = tls_session_secret_cb;
|
|
s->internal->tls_session_secret_cb_arg = arg;
|
|
return (1);
|
|
}
|
|
|
|
int
|
|
SSL_set_session_ticket_ext_cb(SSL *s, tls_session_ticket_ext_cb_fn cb,
|
|
void *arg)
|
|
{
|
|
if (s == NULL)
|
|
return (0);
|
|
s->internal->tls_session_ticket_ext_cb = cb;
|
|
s->internal->tls_session_ticket_ext_cb_arg = arg;
|
|
return (1);
|
|
}
|
|
|
|
int
|
|
SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len)
|
|
{
|
|
if (s->version >= TLS1_VERSION) {
|
|
free(s->internal->tlsext_session_ticket);
|
|
s->internal->tlsext_session_ticket =
|
|
malloc(sizeof(TLS_SESSION_TICKET_EXT) + ext_len);
|
|
if (!s->internal->tlsext_session_ticket) {
|
|
SSLerror(s, ERR_R_MALLOC_FAILURE);
|
|
return 0;
|
|
}
|
|
|
|
if (ext_data) {
|
|
s->internal->tlsext_session_ticket->length = ext_len;
|
|
s->internal->tlsext_session_ticket->data =
|
|
s->internal->tlsext_session_ticket + 1;
|
|
memcpy(s->internal->tlsext_session_ticket->data,
|
|
ext_data, ext_len);
|
|
} else {
|
|
s->internal->tlsext_session_ticket->length = 0;
|
|
s->internal->tlsext_session_ticket->data = NULL;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
typedef struct timeout_param_st {
|
|
SSL_CTX *ctx;
|
|
long time;
|
|
struct lhash_st_SSL_SESSION *cache;
|
|
} TIMEOUT_PARAM;
|
|
|
|
static void
|
|
timeout_doall_arg(SSL_SESSION *s, TIMEOUT_PARAM *p)
|
|
{
|
|
if ((p->time == 0) || (p->time > (s->time + s->timeout))) {
|
|
/* timeout */
|
|
/* The reason we don't call SSL_CTX_remove_session() is to
|
|
* save on locking overhead */
|
|
(void)lh_SSL_SESSION_delete(p->cache, s);
|
|
SSL_SESSION_list_remove(p->ctx, s);
|
|
s->internal->not_resumable = 1;
|
|
if (p->ctx->internal->remove_session_cb != NULL)
|
|
p->ctx->internal->remove_session_cb(p->ctx, s);
|
|
SSL_SESSION_free(s);
|
|
}
|
|
}
|
|
|
|
static void
|
|
timeout_LHASH_DOALL_ARG(void *arg1, void *arg2)
|
|
{
|
|
SSL_SESSION *a = arg1;
|
|
TIMEOUT_PARAM *b = arg2;
|
|
|
|
timeout_doall_arg(a, b);
|
|
}
|
|
|
|
/* XXX 2038 */
|
|
void
|
|
SSL_CTX_flush_sessions(SSL_CTX *s, long t)
|
|
{
|
|
unsigned long i;
|
|
TIMEOUT_PARAM tp;
|
|
|
|
tp.ctx = s;
|
|
tp.cache = s->internal->sessions;
|
|
if (tp.cache == NULL)
|
|
return;
|
|
tp.time = t;
|
|
CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
|
|
i = CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load;
|
|
CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load = 0;
|
|
lh_SSL_SESSION_doall_arg(tp.cache, timeout_LHASH_DOALL_ARG,
|
|
TIMEOUT_PARAM, &tp);
|
|
CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load = i;
|
|
CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
|
|
}
|
|
|
|
int
|
|
ssl_clear_bad_session(SSL *s)
|
|
{
|
|
if ((s->session != NULL) && !(s->internal->shutdown & SSL_SENT_SHUTDOWN) &&
|
|
!(SSL_in_init(s) || SSL_in_before(s))) {
|
|
SSL_CTX_remove_session(s->ctx, s->session);
|
|
return (1);
|
|
} else
|
|
return (0);
|
|
}
|
|
|
|
/* locked by SSL_CTX in the calling function */
|
|
static void
|
|
SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s)
|
|
{
|
|
if ((s->internal->next == NULL) || (s->internal->prev == NULL))
|
|
return;
|
|
|
|
if (s->internal->next == (SSL_SESSION *)&(ctx->internal->session_cache_tail)) {
|
|
/* last element in list */
|
|
if (s->internal->prev == (SSL_SESSION *)&(ctx->internal->session_cache_head)) {
|
|
/* only one element in list */
|
|
ctx->internal->session_cache_head = NULL;
|
|
ctx->internal->session_cache_tail = NULL;
|
|
} else {
|
|
ctx->internal->session_cache_tail = s->internal->prev;
|
|
s->internal->prev->internal->next =
|
|
(SSL_SESSION *)&(ctx->internal->session_cache_tail);
|
|
}
|
|
} else {
|
|
if (s->internal->prev == (SSL_SESSION *)&(ctx->internal->session_cache_head)) {
|
|
/* first element in list */
|
|
ctx->internal->session_cache_head = s->internal->next;
|
|
s->internal->next->internal->prev =
|
|
(SSL_SESSION *)&(ctx->internal->session_cache_head);
|
|
} else {
|
|
/* middle of list */
|
|
s->internal->next->internal->prev = s->internal->prev;
|
|
s->internal->prev->internal->next = s->internal->next;
|
|
}
|
|
}
|
|
s->internal->prev = s->internal->next = NULL;
|
|
}
|
|
|
|
static void
|
|
SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s)
|
|
{
|
|
if ((s->internal->next != NULL) && (s->internal->prev != NULL))
|
|
SSL_SESSION_list_remove(ctx, s);
|
|
|
|
if (ctx->internal->session_cache_head == NULL) {
|
|
ctx->internal->session_cache_head = s;
|
|
ctx->internal->session_cache_tail = s;
|
|
s->internal->prev = (SSL_SESSION *)&(ctx->internal->session_cache_head);
|
|
s->internal->next = (SSL_SESSION *)&(ctx->internal->session_cache_tail);
|
|
} else {
|
|
s->internal->next = ctx->internal->session_cache_head;
|
|
s->internal->next->internal->prev = s;
|
|
s->internal->prev = (SSL_SESSION *)&(ctx->internal->session_cache_head);
|
|
ctx->internal->session_cache_head = s;
|
|
}
|
|
}
|
|
|
|
void
|
|
SSL_CTX_sess_set_new_cb(SSL_CTX *ctx,
|
|
int (*cb)(struct ssl_st *ssl, SSL_SESSION *sess)) {
|
|
ctx->internal->new_session_cb = cb;
|
|
}
|
|
|
|
int
|
|
(*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx))(SSL *ssl, SSL_SESSION *sess)
|
|
{
|
|
return ctx->internal->new_session_cb;
|
|
}
|
|
|
|
void
|
|
SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx,
|
|
void (*cb)(SSL_CTX *ctx, SSL_SESSION *sess))
|
|
{
|
|
ctx->internal->remove_session_cb = cb;
|
|
}
|
|
|
|
void
|
|
(*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx))(SSL_CTX * ctx, SSL_SESSION *sess)
|
|
{
|
|
return ctx->internal->remove_session_cb;
|
|
}
|
|
|
|
void
|
|
SSL_CTX_sess_set_get_cb(SSL_CTX *ctx, SSL_SESSION *(*cb)(struct ssl_st *ssl,
|
|
const unsigned char *data, int len, int *copy))
|
|
{
|
|
ctx->internal->get_session_cb = cb;
|
|
}
|
|
|
|
SSL_SESSION *
|
|
(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx))(SSL *ssl, const unsigned char *data,
|
|
int len, int *copy)
|
|
{
|
|
return ctx->internal->get_session_cb;
|
|
}
|
|
|
|
void
|
|
SSL_CTX_set_info_callback(SSL_CTX *ctx,
|
|
void (*cb)(const SSL *ssl, int type, int val))
|
|
{
|
|
ctx->internal->info_callback = cb;
|
|
}
|
|
|
|
void
|
|
(*SSL_CTX_get_info_callback(SSL_CTX *ctx))(const SSL *ssl, int type, int val)
|
|
{
|
|
return ctx->internal->info_callback;
|
|
}
|
|
|
|
void
|
|
SSL_CTX_set_client_cert_cb(SSL_CTX *ctx,
|
|
int (*cb)(SSL *ssl, X509 **x509, EVP_PKEY **pkey))
|
|
{
|
|
ctx->internal->client_cert_cb = cb;
|
|
}
|
|
|
|
int
|
|
(*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx))(SSL * ssl, X509 ** x509,
|
|
EVP_PKEY **pkey)
|
|
{
|
|
return ctx->internal->client_cert_cb;
|
|
}
|
|
|
|
#ifndef OPENSSL_NO_ENGINE
|
|
int
|
|
SSL_CTX_set_client_cert_engine(SSL_CTX *ctx, ENGINE *e)
|
|
{
|
|
if (!ENGINE_init(e)) {
|
|
SSLerrorx(ERR_R_ENGINE_LIB);
|
|
return 0;
|
|
}
|
|
if (!ENGINE_get_ssl_client_cert_function(e)) {
|
|
SSLerrorx(SSL_R_NO_CLIENT_CERT_METHOD);
|
|
ENGINE_finish(e);
|
|
return 0;
|
|
}
|
|
ctx->internal->client_cert_engine = e;
|
|
return 1;
|
|
}
|
|
#endif
|
|
|
|
void
|
|
SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx,
|
|
int (*cb)(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len))
|
|
{
|
|
ctx->internal->app_gen_cookie_cb = cb;
|
|
}
|
|
|
|
void
|
|
SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx,
|
|
int (*cb)(SSL *ssl, const unsigned char *cookie, unsigned int cookie_len))
|
|
{
|
|
ctx->internal->app_verify_cookie_cb = cb;
|
|
}
|
|
|
|
int
|
|
PEM_write_SSL_SESSION(FILE *fp, SSL_SESSION *x)
|
|
{
|
|
return PEM_ASN1_write((i2d_of_void *)i2d_SSL_SESSION,
|
|
PEM_STRING_SSL_SESSION, fp, x, NULL, NULL, 0, NULL, NULL);
|
|
}
|
|
|
|
SSL_SESSION *
|
|
PEM_read_SSL_SESSION(FILE *fp, SSL_SESSION **x, pem_password_cb *cb, void *u)
|
|
{
|
|
return PEM_ASN1_read((d2i_of_void *)d2i_SSL_SESSION,
|
|
PEM_STRING_SSL_SESSION, fp, (void **)x, cb, u);
|
|
}
|
|
|
|
SSL_SESSION *
|
|
PEM_read_bio_SSL_SESSION(BIO *bp, SSL_SESSION **x, pem_password_cb *cb, void *u)
|
|
{
|
|
return PEM_ASN1_read_bio((d2i_of_void *)d2i_SSL_SESSION,
|
|
PEM_STRING_SSL_SESSION, bp, (void **)x, cb, u);
|
|
}
|
|
|
|
int
|
|
PEM_write_bio_SSL_SESSION(BIO *bp, SSL_SESSION *x)
|
|
{
|
|
return PEM_ASN1_write_bio((i2d_of_void *)i2d_SSL_SESSION,
|
|
PEM_STRING_SSL_SESSION, bp, x, NULL, NULL, 0, NULL, NULL);
|
|
}
|