574 lines
15 KiB
C
574 lines
15 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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# if 0
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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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# endif
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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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# if 0
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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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# endif
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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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# if 0
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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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# endif
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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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112,
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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)
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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 =
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OPENSSL_malloc(SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 2)) == NULL)
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goto err;
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/*
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* wbuf needs one byte more because when using two-byte headers, we leave
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* the first byte unused in do_ssl_write (s2_pkt.c)
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*/
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if ((s2->wbuf =
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OPENSSL_malloc(SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 3)) == NULL)
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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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if (s2->wbuf != NULL)
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OPENSSL_free(s2->wbuf);
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if (s2->rbuf != NULL)
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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)
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OPENSSL_free(s2->rbuf);
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if (s2->wbuf != NULL)
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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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case SSL_CTRL_GET_SESSION_REUSED:
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ret = s->hit;
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break;
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case SSL_CTRL_CHECK_PROTO_VERSION:
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return ssl3_ctrl(s, SSL_CTRL_CHECK_PROTO_VERSION, larg, parg);
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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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/*
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* This function needs to check if the ciphers required are actually
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* available
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*/
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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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if ((cp == NULL) || (cp->valid == 0))
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return NULL;
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else
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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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l = c->id;
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if ((l & 0xff000000) != 0x02000000 && l != SSL3_CK_FALLBACK_SCSV)
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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', see
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* 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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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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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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*/
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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,
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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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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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|
}
|
|
|
|
void ssl2_write_error(SSL *s)
|
|
{
|
|
unsigned char buf[3];
|
|
int i, error;
|
|
|
|
buf[0] = SSL2_MT_ERROR;
|
|
buf[1] = (s->error_code >> 8) & 0xff;
|
|
buf[2] = (s->error_code) & 0xff;
|
|
|
|
/* state=s->rwstate;*/
|
|
|
|
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) {
|
|
/* ERROR */
|
|
s->msg_callback(1, s->version, 0, buf, 3, s,
|
|
s->msg_callback_arg);
|
|
}
|
|
}
|
|
}
|
|
|
|
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
|