94a209d8e1
client hello message. Previously this could only be retrieved on an initial connection and it was impossible to determine the cipher IDs of any uknown ciphersuites.
553 lines
13 KiB
C
553 lines
13 KiB
C
/* ssl/s2_lib.c */
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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) 1998-2007 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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#include "ssl_locl.h"
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#ifndef OPENSSL_NO_SSL2
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#include <stdio.h>
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#include <openssl/objects.h>
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#include <openssl/evp.h>
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#include <openssl/md5.h>
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const char ssl2_version_str[]="SSLv2" OPENSSL_VERSION_PTEXT;
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#define SSL2_NUM_CIPHERS (sizeof(ssl2_ciphers)/sizeof(SSL_CIPHER))
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/* list of available SSLv2 ciphers (sorted by id) */
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OPENSSL_GLOBAL const SSL_CIPHER ssl2_ciphers[]={
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#if 0
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/* NULL_WITH_MD5 v3 */
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{
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1,
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SSL2_TXT_NULL_WITH_MD5,
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SSL2_CK_NULL_WITH_MD5,
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SSL_kRSA,
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SSL_aRSA,
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SSL_eNULL,
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SSL_MD5,
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SSL_SSLV2,
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SSL_EXPORT|SSL_EXP40|SSL_STRONG_NONE,
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0,
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0,
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0,
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},
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#endif
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/* RC4_128_WITH_MD5 */
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{
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1,
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SSL2_TXT_RC4_128_WITH_MD5,
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SSL2_CK_RC4_128_WITH_MD5,
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SSL_kRSA,
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SSL_aRSA,
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SSL_RC4,
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SSL_MD5,
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SSL_SSLV2,
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SSL_NOT_EXP|SSL_MEDIUM,
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0,
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128,
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128,
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},
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/* RC4_128_EXPORT40_WITH_MD5 */
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{
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1,
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SSL2_TXT_RC4_128_EXPORT40_WITH_MD5,
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SSL2_CK_RC4_128_EXPORT40_WITH_MD5,
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SSL_kRSA,
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SSL_aRSA,
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SSL_RC4,
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SSL_MD5,
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SSL_SSLV2,
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SSL_EXPORT|SSL_EXP40,
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SSL2_CF_5_BYTE_ENC,
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40,
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128,
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},
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/* RC2_128_CBC_WITH_MD5 */
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{
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1,
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SSL2_TXT_RC2_128_CBC_WITH_MD5,
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SSL2_CK_RC2_128_CBC_WITH_MD5,
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SSL_kRSA,
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SSL_aRSA,
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SSL_RC2,
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SSL_MD5,
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SSL_SSLV2,
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SSL_NOT_EXP|SSL_MEDIUM,
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0,
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128,
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128,
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},
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/* RC2_128_CBC_EXPORT40_WITH_MD5 */
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{
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1,
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SSL2_TXT_RC2_128_CBC_EXPORT40_WITH_MD5,
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SSL2_CK_RC2_128_CBC_EXPORT40_WITH_MD5,
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SSL_kRSA,
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SSL_aRSA,
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SSL_RC2,
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SSL_MD5,
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SSL_SSLV2,
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SSL_EXPORT|SSL_EXP40,
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SSL2_CF_5_BYTE_ENC,
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40,
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128,
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},
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#ifndef OPENSSL_NO_IDEA
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/* IDEA_128_CBC_WITH_MD5 */
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{
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1,
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SSL2_TXT_IDEA_128_CBC_WITH_MD5,
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SSL2_CK_IDEA_128_CBC_WITH_MD5,
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SSL_kRSA,
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SSL_aRSA,
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SSL_IDEA,
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SSL_MD5,
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SSL_SSLV2,
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SSL_NOT_EXP|SSL_MEDIUM,
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0,
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128,
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128,
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},
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#endif
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/* DES_64_CBC_WITH_MD5 */
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{
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1,
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SSL2_TXT_DES_64_CBC_WITH_MD5,
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SSL2_CK_DES_64_CBC_WITH_MD5,
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SSL_kRSA,
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SSL_aRSA,
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SSL_DES,
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SSL_MD5,
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SSL_SSLV2,
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SSL_NOT_EXP|SSL_LOW,
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0,
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56,
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56,
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},
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/* DES_192_EDE3_CBC_WITH_MD5 */
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{
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1,
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SSL2_TXT_DES_192_EDE3_CBC_WITH_MD5,
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SSL2_CK_DES_192_EDE3_CBC_WITH_MD5,
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SSL_kRSA,
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SSL_aRSA,
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SSL_3DES,
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SSL_MD5,
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SSL_SSLV2,
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SSL_NOT_EXP|SSL_HIGH,
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0,
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168,
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168,
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},
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#if 0
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/* RC4_64_WITH_MD5 */
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{
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1,
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SSL2_TXT_RC4_64_WITH_MD5,
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SSL2_CK_RC4_64_WITH_MD5,
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SSL_kRSA,
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SSL_aRSA,
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SSL_RC4,
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SSL_MD5,
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SSL_SSLV2,
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SSL_NOT_EXP|SSL_LOW,
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SSL2_CF_8_BYTE_ENC,
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64,
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64,
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},
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#endif
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#if 0
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/* NULL SSLeay (testing) */
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{
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0,
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SSL2_TXT_NULL,
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SSL2_CK_NULL,
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0,
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0,
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0,
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0,
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SSL_SSLV2,
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SSL_STRONG_NONE,
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0,
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0,
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0,
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},
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#endif
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/* end of list :-) */
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};
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long ssl2_default_timeout(void)
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{
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return(300);
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}
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int ssl2_num_ciphers(void)
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{
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return(SSL2_NUM_CIPHERS);
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}
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const SSL_CIPHER *ssl2_get_cipher(unsigned int u)
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{
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if (u < SSL2_NUM_CIPHERS)
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return(&(ssl2_ciphers[SSL2_NUM_CIPHERS-1-u]));
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else
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return(NULL);
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}
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int ssl2_pending(const SSL *s)
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{
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return SSL_in_init(s) ? 0 : s->s2->ract_data_length;
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}
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int ssl2_new(SSL *s)
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{
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SSL2_STATE *s2;
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if ((s2=OPENSSL_malloc(sizeof *s2)) == NULL) goto err;
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memset(s2,0,sizeof *s2);
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#if SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER + 3 > SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 2
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# error "assertion failed"
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#endif
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if ((s2->rbuf=OPENSSL_malloc(
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SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+2)) == NULL) goto err;
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/* wbuf needs one byte more because when using two-byte headers,
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* we leave the first byte unused in do_ssl_write (s2_pkt.c) */
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if ((s2->wbuf=OPENSSL_malloc(
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SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+3)) == NULL) goto err;
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s->s2=s2;
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ssl2_clear(s);
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return(1);
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err:
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if (s2 != NULL)
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{
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if (s2->wbuf != NULL) OPENSSL_free(s2->wbuf);
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if (s2->rbuf != NULL) OPENSSL_free(s2->rbuf);
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OPENSSL_free(s2);
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}
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return(0);
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}
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void ssl2_free(SSL *s)
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{
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SSL2_STATE *s2;
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if(s == NULL)
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return;
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s2=s->s2;
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if (s2->rbuf != NULL) OPENSSL_free(s2->rbuf);
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if (s2->wbuf != NULL) OPENSSL_free(s2->wbuf);
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OPENSSL_cleanse(s2,sizeof *s2);
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OPENSSL_free(s2);
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s->s2=NULL;
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}
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void ssl2_clear(SSL *s)
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{
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SSL2_STATE *s2;
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unsigned char *rbuf,*wbuf;
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s2=s->s2;
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rbuf=s2->rbuf;
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wbuf=s2->wbuf;
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memset(s2,0,sizeof *s2);
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s2->rbuf=rbuf;
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s2->wbuf=wbuf;
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s2->clear_text=1;
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s->packet=s2->rbuf;
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s->version=SSL2_VERSION;
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s->packet_length=0;
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}
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long ssl2_ctrl(SSL *s, int cmd, long larg, void *parg)
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{
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int ret=0;
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switch(cmd)
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{
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case SSL_CTRL_GET_SESSION_REUSED:
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ret=s->hit;
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break;
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default:
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break;
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}
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return(ret);
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}
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long ssl2_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
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{
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return(0);
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}
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long ssl2_ctx_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
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{
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return(0);
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}
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long ssl2_ctx_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
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{
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return(0);
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}
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/* This function needs to check if the ciphers required are actually
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* available */
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const SSL_CIPHER *ssl2_get_cipher_by_char(const unsigned char *p)
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{
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SSL_CIPHER c;
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const SSL_CIPHER *cp;
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unsigned long id;
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id=0x02000000L|((unsigned long)p[0]<<16L)|
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((unsigned long)p[1]<<8L)|(unsigned long)p[2];
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c.id=id;
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cp = OBJ_bsearch_ssl_cipher_id(&c, ssl2_ciphers, SSL2_NUM_CIPHERS);
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return cp;
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}
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int ssl2_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p)
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{
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long l;
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if (p != NULL)
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{
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l=c->id;
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if ((l & 0xff000000) != 0x02000000) return(0);
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p[0]=((unsigned char)(l>>16L))&0xFF;
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p[1]=((unsigned char)(l>> 8L))&0xFF;
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p[2]=((unsigned char)(l ))&0xFF;
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}
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return(3);
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}
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int ssl2_generate_key_material(SSL *s)
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{
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unsigned int i;
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EVP_MD_CTX ctx;
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unsigned char *km;
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unsigned char c='0';
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const EVP_MD *md5;
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int md_size;
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md5 = EVP_md5();
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#ifdef CHARSET_EBCDIC
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c = os_toascii['0']; /* Must be an ASCII '0', not EBCDIC '0',
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see SSLv2 docu */
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#endif
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EVP_MD_CTX_init(&ctx);
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km=s->s2->key_material;
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if (s->session->master_key_length < 0 ||
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s->session->master_key_length > (int)sizeof(s->session->master_key))
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{
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SSLerr(SSL_F_SSL2_GENERATE_KEY_MATERIAL, ERR_R_INTERNAL_ERROR);
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return 0;
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}
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md_size = EVP_MD_size(md5);
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if (md_size < 0)
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return 0;
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for (i=0; i<s->s2->key_material_length; i += md_size)
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{
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if (((km - s->s2->key_material) + md_size) >
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(int)sizeof(s->s2->key_material))
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{
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/* EVP_DigestFinal_ex() below would write beyond buffer */
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SSLerr(SSL_F_SSL2_GENERATE_KEY_MATERIAL, ERR_R_INTERNAL_ERROR);
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return 0;
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}
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EVP_DigestInit_ex(&ctx, md5, NULL);
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OPENSSL_assert(s->session->master_key_length >= 0
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&& s->session->master_key_length
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< (int)sizeof(s->session->master_key));
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EVP_DigestUpdate(&ctx,s->session->master_key,s->session->master_key_length);
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EVP_DigestUpdate(&ctx,&c,1);
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c++;
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EVP_DigestUpdate(&ctx,s->s2->challenge,s->s2->challenge_length);
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EVP_DigestUpdate(&ctx,s->s2->conn_id,s->s2->conn_id_length);
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EVP_DigestFinal_ex(&ctx,km,NULL);
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km += md_size;
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}
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EVP_MD_CTX_cleanup(&ctx);
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return 1;
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}
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void ssl2_return_error(SSL *s, int err)
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{
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if (!s->error)
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{
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s->error=3;
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s->error_code=err;
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ssl2_write_error(s);
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}
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}
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void ssl2_write_error(SSL *s)
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{
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unsigned char buf[3];
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int i,error;
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buf[0]=SSL2_MT_ERROR;
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buf[1]=(s->error_code>>8)&0xff;
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buf[2]=(s->error_code)&0xff;
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/* state=s->rwstate;*/
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error=s->error; /* number of bytes left to write */
|
|
s->error=0;
|
|
OPENSSL_assert(error >= 0 && error <= (int)sizeof(buf));
|
|
i=ssl2_write(s,&(buf[3-error]),error);
|
|
|
|
/* if (i == error) s->rwstate=state; */
|
|
|
|
if (i < 0)
|
|
s->error=error;
|
|
else
|
|
{
|
|
s->error=error-i;
|
|
|
|
if (s->error == 0)
|
|
if (s->msg_callback)
|
|
s->msg_callback(1, s->version, 0, buf, 3, s, s->msg_callback_arg); /* ERROR */
|
|
}
|
|
}
|
|
|
|
int ssl2_shutdown(SSL *s)
|
|
{
|
|
s->shutdown=(SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN);
|
|
return(1);
|
|
}
|
|
#else /* !OPENSSL_NO_SSL2 */
|
|
|
|
# if PEDANTIC
|
|
static void *dummy=&dummy;
|
|
# endif
|
|
|
|
#endif
|