s3_enc.c revision 9dc0df1bac950d6e491f9a7c7e4888f2b301cb15
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
/* ====================================================================
* Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* openssl-core@openssl.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#include <stdio.h>
#include "ssl_locl.h"
static unsigned char ssl3_pad_1[48]={
0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36 };
static unsigned char ssl3_pad_2[48]={
0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c };
{
unsigned char c='A';
unsigned int i,j,k;
#ifdef CHARSET_EBCDIC
c = os_toascii[c]; /*'A' in ASCII */
#endif
k=0;
for (i=0; (int)i<num; i+=MD5_DIGEST_LENGTH)
{
k++;
if (k > sizeof buf)
{
/* bug: 'buf' is too small for this ciphersuite */
return 0;
}
for (j=0; j<k; j++)
buf[j]=c;
c++;
s->session->master_key_length);
s->session->master_key_length);
if ((int)(i+MD5_DIGEST_LENGTH) > num)
{
}
else
}
return 1;
}
{
unsigned char *p,*key_block,*mac_secret;
unsigned char exp_key[EVP_MAX_KEY_LENGTH];
unsigned char exp_iv[EVP_MAX_IV_LENGTH];
const EVP_CIPHER *c;
#ifndef OPENSSL_NO_COMP
#endif
const EVP_MD *m;
int reuse_dd = 0;
#ifndef OPENSSL_NO_COMP
else
#endif
if (which & SSL3_CC_READ)
{
if (s->enc_read_ctx != NULL)
reuse_dd = 1;
goto err;
dd= s->enc_read_ctx;
s->read_hash=m;
#ifndef OPENSSL_NO_COMP
/* COMPRESS */
{
COMP_CTX_free(s->expand);
}
{
{
goto err2;
}
goto err;
}
#endif
}
else
{
if (s->enc_write_ctx != NULL)
reuse_dd = 1;
goto err;
dd= s->enc_write_ctx;
s->write_hash=m;
#ifndef OPENSSL_NO_COMP
/* COMPRESS */
{
COMP_CTX_free(s->compress);
}
{
{
goto err2;
}
}
#endif
}
if (reuse_dd)
i=EVP_MD_size(m);
/* Was j=(is_exp)?5:EVP_CIPHER_key_length(c); */
k=EVP_CIPHER_iv_length(c);
if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
{
ms= &(p[ 0]); n=i+i;
key= &(p[ n]); n+=j+j;
iv= &(p[ n]); n+=k+k;
}
else
{
n=i;
ms= &(p[ n]); n+=i+j;
key= &(p[ n]); n+=j+k;
iv= &(p[ n]); n+=k;
}
{
goto err2;
}
if (is_exp)
{
* same value since only the correct one will be used :-).
*/
if (k > 0)
{
}
}
s->session->key_arg_length=0;
return(1);
err:
err2:
return(0);
}
int ssl3_setup_key_block(SSL *s)
{
unsigned char *p;
const EVP_CIPHER *c;
int num;
int ret = 0;
return(1);
{
return(0);
}
#ifdef OPENSSL_NO_COMP
#else
#endif
num*=2;
goto err;
if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
{
/* enable vulnerability countermeasure for CBC ciphers with
* known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
*/
{
s->s3->need_empty_fragments = 0;
#ifndef OPENSSL_NO_RC4
s->s3->need_empty_fragments = 0;
#endif
}
}
return ret;
err:
return(0);
}
void ssl3_cleanup_key_block(SSL *s)
{
{
}
}
{
unsigned long l;
int bs,i;
const EVP_CIPHER *enc;
if (send)
{
ds=s->enc_write_ctx;
if (s->enc_write_ctx == NULL)
else
}
else
{
ds=s->enc_read_ctx;
if (s->enc_read_ctx == NULL)
else
}
{
}
else
{
/* COMPRESS */
{
/* we need to add 'i-1' padding bytes */
l+=i;
}
if (!send)
{
if (l == 0 || l%bs != 0)
{
return 0;
}
/* otherwise, rec->length >= bs */
}
{
/* SSL 3.0 bounds the number of padding bytes by the block size;
* padding bytes (except the last one) are arbitrary */
if (i > bs)
{
/* Incorrect padding. SSLerr() and ssl3_alert are done
* by caller: we don't want to reveal whether this is
* a decryption error or a MAC verification failure
* (see http://www.openssl.org/~bodo/tls-cbc.txt) */
return -1;
}
/* now i <= bs <= rec->length */
}
}
return(1);
}
void ssl3_init_finished_mac(SSL *s)
{
}
{
}
{
}
{
int ret;
p+=ret;
return(ret);
}
{
unsigned int ret;
int npad,n;
unsigned int i;
unsigned char md_buf[EVP_MAX_MD_SIZE];
n=EVP_MD_CTX_size(&ctx);
npad=(48/n)*n;
s->session->master_key_length);
s->session->master_key_length);
return((int)ret);
}
{
unsigned char *p,rec_char;
unsigned int md_size;
int npad;
if (send)
{
}
else
{
}
/* Chop the digest off the end :-) */
p=md;
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 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];
int i,ret=0;
unsigned int n;
for (i=0; i<3; i++)
{
out+=n;
ret+=n;
}
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_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);
default: return(-1);
}
}