-=-=-=-=-=-=-=-=-=-=-=-=-= -Begin work on Navigation Meshes (simple pathfinding for now, will improve soon) -More doc on theme overriding -Upgraded OpenSSL to version without bugs -Misc bugfixes
898 lines
26 KiB
C
898 lines
26 KiB
C
/* ssl/s3_enc.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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/* ====================================================================
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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 <stdio.h>
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#include "ssl_locl.h"
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#include <openssl/evp.h>
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#include <openssl/md5.h>
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static unsigned char ssl3_pad_1[48]={
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0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
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0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
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0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
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0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
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0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
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0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36 };
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static unsigned char ssl3_pad_2[48]={
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0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
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0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
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0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
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0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
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0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
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0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c };
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static int ssl3_handshake_mac(SSL *s, int md_nid,
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const char *sender, int len, unsigned char *p);
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static int ssl3_generate_key_block(SSL *s, unsigned char *km, int num)
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{
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EVP_MD_CTX m5;
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EVP_MD_CTX s1;
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unsigned char buf[16],smd[SHA_DIGEST_LENGTH];
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unsigned char c='A';
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unsigned int i,j,k;
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#ifdef CHARSET_EBCDIC
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c = os_toascii[c]; /*'A' in ASCII */
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#endif
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k=0;
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EVP_MD_CTX_init(&m5);
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EVP_MD_CTX_set_flags(&m5, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
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EVP_MD_CTX_init(&s1);
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for (i=0; (int)i<num; i+=MD5_DIGEST_LENGTH)
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{
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k++;
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if (k > sizeof buf)
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{
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/* bug: 'buf' is too small for this ciphersuite */
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SSLerr(SSL_F_SSL3_GENERATE_KEY_BLOCK, ERR_R_INTERNAL_ERROR);
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return 0;
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}
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for (j=0; j<k; j++)
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buf[j]=c;
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c++;
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EVP_DigestInit_ex(&s1,EVP_sha1(), NULL);
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EVP_DigestUpdate(&s1,buf,k);
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EVP_DigestUpdate(&s1,s->session->master_key,
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s->session->master_key_length);
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EVP_DigestUpdate(&s1,s->s3->server_random,SSL3_RANDOM_SIZE);
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EVP_DigestUpdate(&s1,s->s3->client_random,SSL3_RANDOM_SIZE);
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EVP_DigestFinal_ex(&s1,smd,NULL);
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EVP_DigestInit_ex(&m5,EVP_md5(), NULL);
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EVP_DigestUpdate(&m5,s->session->master_key,
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s->session->master_key_length);
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EVP_DigestUpdate(&m5,smd,SHA_DIGEST_LENGTH);
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if ((int)(i+MD5_DIGEST_LENGTH) > num)
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{
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EVP_DigestFinal_ex(&m5,smd,NULL);
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memcpy(km,smd,(num-i));
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}
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else
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EVP_DigestFinal_ex(&m5,km,NULL);
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km+=MD5_DIGEST_LENGTH;
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}
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OPENSSL_cleanse(smd,SHA_DIGEST_LENGTH);
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EVP_MD_CTX_cleanup(&m5);
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EVP_MD_CTX_cleanup(&s1);
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return 1;
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}
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int ssl3_change_cipher_state(SSL *s, int which)
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{
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unsigned char *p,*mac_secret;
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unsigned char exp_key[EVP_MAX_KEY_LENGTH];
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unsigned char exp_iv[EVP_MAX_IV_LENGTH];
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unsigned char *ms,*key,*iv,*er1,*er2;
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EVP_CIPHER_CTX *dd;
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const EVP_CIPHER *c;
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#ifndef OPENSSL_NO_COMP
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COMP_METHOD *comp;
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#endif
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const EVP_MD *m;
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EVP_MD_CTX md;
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int is_exp,n,i,j,k,cl;
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int reuse_dd = 0;
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is_exp=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
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c=s->s3->tmp.new_sym_enc;
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m=s->s3->tmp.new_hash;
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/* m == NULL will lead to a crash later */
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OPENSSL_assert(m);
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#ifndef OPENSSL_NO_COMP
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if (s->s3->tmp.new_compression == NULL)
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comp=NULL;
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else
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comp=s->s3->tmp.new_compression->method;
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#endif
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if (which & SSL3_CC_READ)
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{
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if (s->enc_read_ctx != NULL)
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reuse_dd = 1;
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else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
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goto err;
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else
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/* make sure it's intialized in case we exit later with an error */
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EVP_CIPHER_CTX_init(s->enc_read_ctx);
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dd= s->enc_read_ctx;
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ssl_replace_hash(&s->read_hash,m);
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#ifndef OPENSSL_NO_COMP
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/* COMPRESS */
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if (s->expand != NULL)
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{
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COMP_CTX_free(s->expand);
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s->expand=NULL;
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}
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if (comp != NULL)
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{
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s->expand=COMP_CTX_new(comp);
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if (s->expand == NULL)
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{
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SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
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goto err2;
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}
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if (s->s3->rrec.comp == NULL)
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s->s3->rrec.comp=(unsigned char *)
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OPENSSL_malloc(SSL3_RT_MAX_PLAIN_LENGTH);
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if (s->s3->rrec.comp == NULL)
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goto err;
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}
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#endif
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memset(&(s->s3->read_sequence[0]),0,8);
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mac_secret= &(s->s3->read_mac_secret[0]);
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}
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else
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{
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if (s->enc_write_ctx != NULL)
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reuse_dd = 1;
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else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
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goto err;
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else
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/* make sure it's intialized in case we exit later with an error */
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EVP_CIPHER_CTX_init(s->enc_write_ctx);
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dd= s->enc_write_ctx;
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ssl_replace_hash(&s->write_hash,m);
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#ifndef OPENSSL_NO_COMP
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/* COMPRESS */
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if (s->compress != NULL)
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{
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COMP_CTX_free(s->compress);
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s->compress=NULL;
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}
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if (comp != NULL)
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{
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s->compress=COMP_CTX_new(comp);
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if (s->compress == NULL)
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{
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SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
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goto err2;
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}
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}
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#endif
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memset(&(s->s3->write_sequence[0]),0,8);
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mac_secret= &(s->s3->write_mac_secret[0]);
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}
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if (reuse_dd)
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EVP_CIPHER_CTX_cleanup(dd);
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p=s->s3->tmp.key_block;
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i=EVP_MD_size(m);
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if (i < 0)
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goto err2;
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cl=EVP_CIPHER_key_length(c);
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j=is_exp ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
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cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
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/* Was j=(is_exp)?5:EVP_CIPHER_key_length(c); */
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k=EVP_CIPHER_iv_length(c);
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if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
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(which == SSL3_CHANGE_CIPHER_SERVER_READ))
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{
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ms= &(p[ 0]); n=i+i;
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key= &(p[ n]); n+=j+j;
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iv= &(p[ n]); n+=k+k;
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er1= &(s->s3->client_random[0]);
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er2= &(s->s3->server_random[0]);
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}
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else
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{
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n=i;
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ms= &(p[ n]); n+=i+j;
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key= &(p[ n]); n+=j+k;
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iv= &(p[ n]); n+=k;
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er1= &(s->s3->server_random[0]);
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er2= &(s->s3->client_random[0]);
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}
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if (n > s->s3->tmp.key_block_length)
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{
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SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
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goto err2;
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}
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EVP_MD_CTX_init(&md);
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memcpy(mac_secret,ms,i);
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if (is_exp)
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{
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/* In here I set both the read and write key/iv to the
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* same value since only the correct one will be used :-).
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*/
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EVP_DigestInit_ex(&md,EVP_md5(), NULL);
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EVP_DigestUpdate(&md,key,j);
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EVP_DigestUpdate(&md,er1,SSL3_RANDOM_SIZE);
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EVP_DigestUpdate(&md,er2,SSL3_RANDOM_SIZE);
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EVP_DigestFinal_ex(&md,&(exp_key[0]),NULL);
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key= &(exp_key[0]);
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if (k > 0)
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{
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EVP_DigestInit_ex(&md,EVP_md5(), NULL);
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EVP_DigestUpdate(&md,er1,SSL3_RANDOM_SIZE);
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EVP_DigestUpdate(&md,er2,SSL3_RANDOM_SIZE);
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EVP_DigestFinal_ex(&md,&(exp_iv[0]),NULL);
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iv= &(exp_iv[0]);
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}
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}
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s->session->key_arg_length=0;
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EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
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OPENSSL_cleanse(&(exp_key[0]),sizeof(exp_key));
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OPENSSL_cleanse(&(exp_iv[0]),sizeof(exp_iv));
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EVP_MD_CTX_cleanup(&md);
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return(1);
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err:
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SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
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err2:
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return(0);
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}
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int ssl3_setup_key_block(SSL *s)
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{
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unsigned char *p;
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const EVP_CIPHER *c;
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const EVP_MD *hash;
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int num;
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int ret = 0;
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SSL_COMP *comp;
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if (s->s3->tmp.key_block_length != 0)
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return(1);
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if (!ssl_cipher_get_evp(s->session,&c,&hash,NULL,NULL,&comp))
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{
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SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
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return(0);
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}
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s->s3->tmp.new_sym_enc=c;
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s->s3->tmp.new_hash=hash;
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#ifdef OPENSSL_NO_COMP
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s->s3->tmp.new_compression=NULL;
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#else
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s->s3->tmp.new_compression=comp;
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#endif
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num=EVP_MD_size(hash);
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if (num < 0)
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return 0;
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num=EVP_CIPHER_key_length(c)+num+EVP_CIPHER_iv_length(c);
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num*=2;
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ssl3_cleanup_key_block(s);
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if ((p=OPENSSL_malloc(num)) == NULL)
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goto err;
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s->s3->tmp.key_block_length=num;
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s->s3->tmp.key_block=p;
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ret = ssl3_generate_key_block(s,p,num);
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if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
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{
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/* enable vulnerability countermeasure for CBC ciphers with
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* known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
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*/
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s->s3->need_empty_fragments = 1;
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if (s->session->cipher != NULL)
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{
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|
if (s->session->cipher->algorithm_enc == SSL_eNULL)
|
|
s->s3->need_empty_fragments = 0;
|
|
|
|
#ifndef OPENSSL_NO_RC4
|
|
if (s->session->cipher->algorithm_enc == SSL_RC4)
|
|
s->s3->need_empty_fragments = 0;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
|
|
err:
|
|
SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
|
|
return(0);
|
|
}
|
|
|
|
void ssl3_cleanup_key_block(SSL *s)
|
|
{
|
|
if (s->s3->tmp.key_block != NULL)
|
|
{
|
|
OPENSSL_cleanse(s->s3->tmp.key_block,
|
|
s->s3->tmp.key_block_length);
|
|
OPENSSL_free(s->s3->tmp.key_block);
|
|
s->s3->tmp.key_block=NULL;
|
|
}
|
|
s->s3->tmp.key_block_length=0;
|
|
}
|
|
|
|
/* ssl3_enc encrypts/decrypts the record in |s->wrec| / |s->rrec|, respectively.
|
|
*
|
|
* Returns:
|
|
* 0: (in non-constant time) if the record is publically invalid (i.e. too
|
|
* short etc).
|
|
* 1: if the record's padding is valid / the encryption was successful.
|
|
* -1: if the record's padding is invalid or, if sending, an internal error
|
|
* occured.
|
|
*/
|
|
int ssl3_enc(SSL *s, int send)
|
|
{
|
|
SSL3_RECORD *rec;
|
|
EVP_CIPHER_CTX *ds;
|
|
unsigned long l;
|
|
int bs,i,mac_size=0;
|
|
const EVP_CIPHER *enc;
|
|
|
|
if (send)
|
|
{
|
|
ds=s->enc_write_ctx;
|
|
rec= &(s->s3->wrec);
|
|
if (s->enc_write_ctx == NULL)
|
|
enc=NULL;
|
|
else
|
|
enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
|
|
}
|
|
else
|
|
{
|
|
ds=s->enc_read_ctx;
|
|
rec= &(s->s3->rrec);
|
|
if (s->enc_read_ctx == NULL)
|
|
enc=NULL;
|
|
else
|
|
enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
|
|
}
|
|
|
|
if ((s->session == NULL) || (ds == NULL) ||
|
|
(enc == NULL))
|
|
{
|
|
memmove(rec->data,rec->input,rec->length);
|
|
rec->input=rec->data;
|
|
}
|
|
else
|
|
{
|
|
l=rec->length;
|
|
bs=EVP_CIPHER_block_size(ds->cipher);
|
|
|
|
/* COMPRESS */
|
|
|
|
if ((bs != 1) && send)
|
|
{
|
|
i=bs-((int)l%bs);
|
|
|
|
/* we need to add 'i-1' padding bytes */
|
|
l+=i;
|
|
/* the last of these zero bytes will be overwritten
|
|
* with the padding length. */
|
|
memset(&rec->input[rec->length], 0, i);
|
|
rec->length+=i;
|
|
rec->input[l-1]=(i-1);
|
|
}
|
|
|
|
if (!send)
|
|
{
|
|
if (l == 0 || l%bs != 0)
|
|
return 0;
|
|
/* otherwise, rec->length >= bs */
|
|
}
|
|
|
|
EVP_Cipher(ds,rec->data,rec->input,l);
|
|
|
|
if (EVP_MD_CTX_md(s->read_hash) != NULL)
|
|
mac_size = EVP_MD_CTX_size(s->read_hash);
|
|
if ((bs != 1) && !send)
|
|
return ssl3_cbc_remove_padding(s, rec, bs, mac_size);
|
|
}
|
|
return(1);
|
|
}
|
|
|
|
void ssl3_init_finished_mac(SSL *s)
|
|
{
|
|
if (s->s3->handshake_buffer) BIO_free(s->s3->handshake_buffer);
|
|
if (s->s3->handshake_dgst) ssl3_free_digest_list(s);
|
|
s->s3->handshake_buffer=BIO_new(BIO_s_mem());
|
|
(void)BIO_set_close(s->s3->handshake_buffer,BIO_CLOSE);
|
|
}
|
|
|
|
void ssl3_free_digest_list(SSL *s)
|
|
{
|
|
int i;
|
|
if (!s->s3->handshake_dgst) return;
|
|
for (i=0;i<SSL_MAX_DIGEST;i++)
|
|
{
|
|
if (s->s3->handshake_dgst[i])
|
|
EVP_MD_CTX_destroy(s->s3->handshake_dgst[i]);
|
|
}
|
|
OPENSSL_free(s->s3->handshake_dgst);
|
|
s->s3->handshake_dgst=NULL;
|
|
}
|
|
|
|
|
|
|
|
void ssl3_finish_mac(SSL *s, const unsigned char *buf, int len)
|
|
{
|
|
if (s->s3->handshake_buffer && !(s->s3->flags & TLS1_FLAGS_KEEP_HANDSHAKE))
|
|
{
|
|
BIO_write (s->s3->handshake_buffer,(void *)buf,len);
|
|
}
|
|
else
|
|
{
|
|
int i;
|
|
for (i=0;i< SSL_MAX_DIGEST;i++)
|
|
{
|
|
if (s->s3->handshake_dgst[i]!= NULL)
|
|
EVP_DigestUpdate(s->s3->handshake_dgst[i],buf,len);
|
|
}
|
|
}
|
|
}
|
|
|
|
int ssl3_digest_cached_records(SSL *s)
|
|
{
|
|
int i;
|
|
long mask;
|
|
const EVP_MD *md;
|
|
long hdatalen;
|
|
void *hdata;
|
|
|
|
/* Allocate handshake_dgst array */
|
|
ssl3_free_digest_list(s);
|
|
s->s3->handshake_dgst = OPENSSL_malloc(SSL_MAX_DIGEST * sizeof(EVP_MD_CTX *));
|
|
memset(s->s3->handshake_dgst,0,SSL_MAX_DIGEST *sizeof(EVP_MD_CTX *));
|
|
hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,&hdata);
|
|
if (hdatalen <= 0)
|
|
{
|
|
SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS, SSL_R_BAD_HANDSHAKE_LENGTH);
|
|
return 0;
|
|
}
|
|
|
|
/* Loop through bitso of algorithm2 field and create MD_CTX-es */
|
|
for (i=0;ssl_get_handshake_digest(i,&mask,&md); i++)
|
|
{
|
|
if ((mask & ssl_get_algorithm2(s)) && md)
|
|
{
|
|
s->s3->handshake_dgst[i]=EVP_MD_CTX_create();
|
|
#ifdef OPENSSL_FIPS
|
|
if (EVP_MD_nid(md) == NID_md5)
|
|
{
|
|
EVP_MD_CTX_set_flags(s->s3->handshake_dgst[i],
|
|
EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
|
|
}
|
|
#endif
|
|
EVP_DigestInit_ex(s->s3->handshake_dgst[i],md,NULL);
|
|
EVP_DigestUpdate(s->s3->handshake_dgst[i],hdata,hdatalen);
|
|
}
|
|
else
|
|
{
|
|
s->s3->handshake_dgst[i]=NULL;
|
|
}
|
|
}
|
|
if (!(s->s3->flags & TLS1_FLAGS_KEEP_HANDSHAKE))
|
|
{
|
|
/* Free handshake_buffer BIO */
|
|
BIO_free(s->s3->handshake_buffer);
|
|
s->s3->handshake_buffer = NULL;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
int ssl3_cert_verify_mac(SSL *s, int md_nid, unsigned char *p)
|
|
{
|
|
return(ssl3_handshake_mac(s,md_nid,NULL,0,p));
|
|
}
|
|
int ssl3_final_finish_mac(SSL *s,
|
|
const char *sender, int len, unsigned char *p)
|
|
{
|
|
int ret;
|
|
ret=ssl3_handshake_mac(s,NID_md5,sender,len,p);
|
|
p+=ret;
|
|
ret+=ssl3_handshake_mac(s,NID_sha1,sender,len,p);
|
|
return(ret);
|
|
}
|
|
static int ssl3_handshake_mac(SSL *s, int md_nid,
|
|
const char *sender, int len, unsigned char *p)
|
|
{
|
|
unsigned int ret;
|
|
int npad,n;
|
|
unsigned int i;
|
|
unsigned char md_buf[EVP_MAX_MD_SIZE];
|
|
EVP_MD_CTX ctx,*d=NULL;
|
|
|
|
if (s->s3->handshake_buffer)
|
|
if (!ssl3_digest_cached_records(s))
|
|
return 0;
|
|
|
|
/* Search for digest of specified type in the handshake_dgst
|
|
* array*/
|
|
for (i=0;i<SSL_MAX_DIGEST;i++)
|
|
{
|
|
if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid)
|
|
{
|
|
d=s->s3->handshake_dgst[i];
|
|
break;
|
|
}
|
|
}
|
|
if (!d) {
|
|
SSLerr(SSL_F_SSL3_HANDSHAKE_MAC,SSL_R_NO_REQUIRED_DIGEST);
|
|
return 0;
|
|
}
|
|
EVP_MD_CTX_init(&ctx);
|
|
EVP_MD_CTX_set_flags(&ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
|
|
EVP_MD_CTX_copy_ex(&ctx,d);
|
|
n=EVP_MD_CTX_size(&ctx);
|
|
if (n < 0)
|
|
return 0;
|
|
|
|
npad=(48/n)*n;
|
|
if (sender != NULL)
|
|
EVP_DigestUpdate(&ctx,sender,len);
|
|
EVP_DigestUpdate(&ctx,s->session->master_key,
|
|
s->session->master_key_length);
|
|
EVP_DigestUpdate(&ctx,ssl3_pad_1,npad);
|
|
EVP_DigestFinal_ex(&ctx,md_buf,&i);
|
|
|
|
EVP_DigestInit_ex(&ctx,EVP_MD_CTX_md(&ctx), NULL);
|
|
EVP_DigestUpdate(&ctx,s->session->master_key,
|
|
s->session->master_key_length);
|
|
EVP_DigestUpdate(&ctx,ssl3_pad_2,npad);
|
|
EVP_DigestUpdate(&ctx,md_buf,i);
|
|
EVP_DigestFinal_ex(&ctx,p,&ret);
|
|
|
|
EVP_MD_CTX_cleanup(&ctx);
|
|
|
|
return((int)ret);
|
|
}
|
|
|
|
int n_ssl3_mac(SSL *ssl, unsigned char *md, int send)
|
|
{
|
|
SSL3_RECORD *rec;
|
|
unsigned char *mac_sec,*seq;
|
|
EVP_MD_CTX md_ctx;
|
|
const EVP_MD_CTX *hash;
|
|
unsigned char *p,rec_char;
|
|
size_t md_size, orig_len;
|
|
int npad;
|
|
int t;
|
|
|
|
if (send)
|
|
{
|
|
rec= &(ssl->s3->wrec);
|
|
mac_sec= &(ssl->s3->write_mac_secret[0]);
|
|
seq= &(ssl->s3->write_sequence[0]);
|
|
hash=ssl->write_hash;
|
|
}
|
|
else
|
|
{
|
|
rec= &(ssl->s3->rrec);
|
|
mac_sec= &(ssl->s3->read_mac_secret[0]);
|
|
seq= &(ssl->s3->read_sequence[0]);
|
|
hash=ssl->read_hash;
|
|
}
|
|
|
|
t=EVP_MD_CTX_size(hash);
|
|
if (t < 0)
|
|
return -1;
|
|
md_size=t;
|
|
npad=(48/md_size)*md_size;
|
|
|
|
/* kludge: ssl3_cbc_remove_padding passes padding length in rec->type */
|
|
orig_len = rec->length+md_size+((unsigned int)rec->type>>8);
|
|
rec->type &= 0xff;
|
|
|
|
if (!send &&
|
|
EVP_CIPHER_CTX_mode(ssl->enc_read_ctx) == EVP_CIPH_CBC_MODE &&
|
|
ssl3_cbc_record_digest_supported(hash))
|
|
{
|
|
/* This is a CBC-encrypted record. We must avoid leaking any
|
|
* timing-side channel information about how many blocks of
|
|
* data we are hashing because that gives an attacker a
|
|
* timing-oracle. */
|
|
|
|
/* npad is, at most, 48 bytes and that's with MD5:
|
|
* 16 + 48 + 8 (sequence bytes) + 1 + 2 = 75.
|
|
*
|
|
* With SHA-1 (the largest hash speced for SSLv3) the hash size
|
|
* goes up 4, but npad goes down by 8, resulting in a smaller
|
|
* total size. */
|
|
unsigned char header[75];
|
|
unsigned j = 0;
|
|
memcpy(header+j, mac_sec, md_size);
|
|
j += md_size;
|
|
memcpy(header+j, ssl3_pad_1, npad);
|
|
j += npad;
|
|
memcpy(header+j, seq, 8);
|
|
j += 8;
|
|
header[j++] = rec->type;
|
|
header[j++] = rec->length >> 8;
|
|
header[j++] = rec->length & 0xff;
|
|
|
|
ssl3_cbc_digest_record(
|
|
hash,
|
|
md, &md_size,
|
|
header, rec->input,
|
|
rec->length + md_size, orig_len,
|
|
mac_sec, md_size,
|
|
1 /* is SSLv3 */);
|
|
}
|
|
else
|
|
{
|
|
unsigned int md_size_u;
|
|
/* Chop the digest off the end :-) */
|
|
EVP_MD_CTX_init(&md_ctx);
|
|
|
|
EVP_MD_CTX_copy_ex( &md_ctx,hash);
|
|
EVP_DigestUpdate(&md_ctx,mac_sec,md_size);
|
|
EVP_DigestUpdate(&md_ctx,ssl3_pad_1,npad);
|
|
EVP_DigestUpdate(&md_ctx,seq,8);
|
|
rec_char=rec->type;
|
|
EVP_DigestUpdate(&md_ctx,&rec_char,1);
|
|
p=md;
|
|
s2n(rec->length,p);
|
|
EVP_DigestUpdate(&md_ctx,md,2);
|
|
EVP_DigestUpdate(&md_ctx,rec->input,rec->length);
|
|
EVP_DigestFinal_ex( &md_ctx,md,NULL);
|
|
|
|
EVP_MD_CTX_copy_ex( &md_ctx,hash);
|
|
EVP_DigestUpdate(&md_ctx,mac_sec,md_size);
|
|
EVP_DigestUpdate(&md_ctx,ssl3_pad_2,npad);
|
|
EVP_DigestUpdate(&md_ctx,md,md_size);
|
|
EVP_DigestFinal_ex( &md_ctx,md,&md_size_u);
|
|
md_size = md_size_u;
|
|
|
|
EVP_MD_CTX_cleanup(&md_ctx);
|
|
}
|
|
|
|
ssl3_record_sequence_update(seq);
|
|
return(md_size);
|
|
}
|
|
|
|
void ssl3_record_sequence_update(unsigned char *seq)
|
|
{
|
|
int i;
|
|
|
|
for (i=7; i>=0; i--)
|
|
{
|
|
++seq[i];
|
|
if (seq[i] != 0) break;
|
|
}
|
|
}
|
|
|
|
int ssl3_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
|
|
int len)
|
|
{
|
|
static const unsigned char *salt[3]={
|
|
#ifndef CHARSET_EBCDIC
|
|
(const unsigned char *)"A",
|
|
(const unsigned char *)"BB",
|
|
(const unsigned char *)"CCC",
|
|
#else
|
|
(const unsigned char *)"\x41",
|
|
(const unsigned char *)"\x42\x42",
|
|
(const unsigned char *)"\x43\x43\x43",
|
|
#endif
|
|
};
|
|
unsigned char buf[EVP_MAX_MD_SIZE];
|
|
EVP_MD_CTX ctx;
|
|
int i,ret=0;
|
|
unsigned int n;
|
|
|
|
EVP_MD_CTX_init(&ctx);
|
|
for (i=0; i<3; i++)
|
|
{
|
|
EVP_DigestInit_ex(&ctx,s->ctx->sha1, NULL);
|
|
EVP_DigestUpdate(&ctx,salt[i],strlen((const char *)salt[i]));
|
|
EVP_DigestUpdate(&ctx,p,len);
|
|
EVP_DigestUpdate(&ctx,&(s->s3->client_random[0]),
|
|
SSL3_RANDOM_SIZE);
|
|
EVP_DigestUpdate(&ctx,&(s->s3->server_random[0]),
|
|
SSL3_RANDOM_SIZE);
|
|
EVP_DigestFinal_ex(&ctx,buf,&n);
|
|
|
|
EVP_DigestInit_ex(&ctx,s->ctx->md5, NULL);
|
|
EVP_DigestUpdate(&ctx,p,len);
|
|
EVP_DigestUpdate(&ctx,buf,n);
|
|
EVP_DigestFinal_ex(&ctx,out,&n);
|
|
out+=n;
|
|
ret+=n;
|
|
}
|
|
EVP_MD_CTX_cleanup(&ctx);
|
|
return(ret);
|
|
}
|
|
|
|
int ssl3_alert_code(int code)
|
|
{
|
|
switch (code)
|
|
{
|
|
case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY);
|
|
case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
|
|
case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC);
|
|
case SSL_AD_DECRYPTION_FAILED: return(SSL3_AD_BAD_RECORD_MAC);
|
|
case SSL_AD_RECORD_OVERFLOW: return(SSL3_AD_BAD_RECORD_MAC);
|
|
case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
|
|
case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE);
|
|
case SSL_AD_NO_CERTIFICATE: return(SSL3_AD_NO_CERTIFICATE);
|
|
case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE);
|
|
case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
|
|
case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
|
|
case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
|
|
case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
|
|
case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER);
|
|
case SSL_AD_UNKNOWN_CA: return(SSL3_AD_BAD_CERTIFICATE);
|
|
case SSL_AD_ACCESS_DENIED: return(SSL3_AD_HANDSHAKE_FAILURE);
|
|
case SSL_AD_DECODE_ERROR: return(SSL3_AD_HANDSHAKE_FAILURE);
|
|
case SSL_AD_DECRYPT_ERROR: return(SSL3_AD_HANDSHAKE_FAILURE);
|
|
case SSL_AD_EXPORT_RESTRICTION: return(SSL3_AD_HANDSHAKE_FAILURE);
|
|
case SSL_AD_PROTOCOL_VERSION: return(SSL3_AD_HANDSHAKE_FAILURE);
|
|
case SSL_AD_INSUFFICIENT_SECURITY:return(SSL3_AD_HANDSHAKE_FAILURE);
|
|
case SSL_AD_INTERNAL_ERROR: return(SSL3_AD_HANDSHAKE_FAILURE);
|
|
case SSL_AD_USER_CANCELLED: return(SSL3_AD_HANDSHAKE_FAILURE);
|
|
case SSL_AD_NO_RENEGOTIATION: return(-1); /* Don't send it :-) */
|
|
case SSL_AD_UNSUPPORTED_EXTENSION: return(SSL3_AD_HANDSHAKE_FAILURE);
|
|
case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(SSL3_AD_HANDSHAKE_FAILURE);
|
|
case SSL_AD_UNRECOGNIZED_NAME: return(SSL3_AD_HANDSHAKE_FAILURE);
|
|
case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(SSL3_AD_HANDSHAKE_FAILURE);
|
|
case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(SSL3_AD_HANDSHAKE_FAILURE);
|
|
case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY);
|
|
default: return(-1);
|
|
}
|
|
}
|
|
|