/* ssl/t1_reneg.c */
/* 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
* documentation and/or other materials provided with the distribution.
* 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) 1998-2009 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
* the documentation and/or other materials provided with the
* 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 <openssl/objects.h>
#include "ssl_locl.h"
/* Add the client's renegotiation binding */
int ssl_add_clienthello_renegotiate_ext(SSL *s, unsigned char *p, int *len,
int maxlen)
{
if (p) {
if ((s->s3->previous_client_finished_len + 1) > maxlen) {
SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_RENEGOTIATE_EXT,
SSL_R_RENEGOTIATE_EXT_TOO_LONG);
return 0;
}
/* Length byte */
*p = s->s3->previous_client_finished_len;
p++;
memcpy(p, s->s3->previous_client_finished,
s->s3->previous_client_finished_len);
#ifdef OPENSSL_RI_DEBUG
fprintf(stderr, "%s RI extension sent by client\n",
s->s3->previous_client_finished_len ? "Non-empty" : "Empty");
#endif
}
*len = s->s3->previous_client_finished_len + 1;
return 1;
}
/*
* Parse the client's renegotiation binding and abort if it's not right
*/
int ssl_parse_clienthello_renegotiate_ext(SSL *s, unsigned char *d, int len,
int *al)
{
int ilen;
/* Parse the length byte */
if (len < 1) {
SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,
SSL_R_RENEGOTIATION_ENCODING_ERR);
*al = SSL_AD_ILLEGAL_PARAMETER;
return 0;
}
ilen = *d;
d++;
/* Consistency check */
if ((ilen + 1) != len) {
SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,
SSL_R_RENEGOTIATION_ENCODING_ERR);
*al = SSL_AD_ILLEGAL_PARAMETER;
return 0;
}
/* Check that the extension matches */
if (ilen != s->s3->previous_client_finished_len) {
SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,
SSL_R_RENEGOTIATION_MISMATCH);
*al = SSL_AD_HANDSHAKE_FAILURE;
return 0;
}
if (memcmp(d, s->s3->previous_client_finished,
s->s3->previous_client_finished_len)) {
SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,
SSL_R_RENEGOTIATION_MISMATCH);
*al = SSL_AD_HANDSHAKE_FAILURE;
return 0;
}
#ifdef OPENSSL_RI_DEBUG
fprintf(stderr, "%s RI extension received by server\n",
ilen ? "Non-empty" : "Empty");
#endif
s->s3->send_connection_binding = 1;
return 1;
}
/* Add the server's renegotiation binding */
int ssl_add_serverhello_renegotiate_ext(SSL *s, unsigned char *p, int *len,
int maxlen)
{
if (p) {
if ((s->s3->previous_client_finished_len +
s->s3->previous_server_finished_len + 1) > maxlen) {
SSLerr(SSL_F_SSL_ADD_SERVERHELLO_RENEGOTIATE_EXT,
SSL_R_RENEGOTIATE_EXT_TOO_LONG);
return 0;
}
/* Length byte */
*p = s->s3->previous_client_finished_len +
s->s3->previous_server_finished_len;
p++;
memcpy(p, s->s3->previous_client_finished,
s->s3->previous_client_finished_len);
p += s->s3->previous_client_finished_len;
memcpy(p, s->s3->previous_server_finished,
s->s3->previous_server_finished_len);
#ifdef OPENSSL_RI_DEBUG
fprintf(stderr, "%s RI extension sent by server\n",
s->s3->previous_client_finished_len ? "Non-empty" : "Empty");
#endif
}
*len = s->s3->previous_client_finished_len
+ s->s3->previous_server_finished_len + 1;
return 1;
}
/*
* Parse the server's renegotiation binding and abort if it's not right
*/
int ssl_parse_serverhello_renegotiate_ext(SSL *s, unsigned char *d, int len,
int *al)
{
int expected_len = s->s3->previous_client_finished_len
+ s->s3->previous_server_finished_len;
int ilen;
/* Check for logic errors */
OPENSSL_assert(!expected_len || s->s3->previous_client_finished_len);
OPENSSL_assert(!expected_len || s->s3->previous_server_finished_len);
/* Parse the length byte */
if (len < 1) {
SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,
SSL_R_RENEGOTIATION_ENCODING_ERR);
*al = SSL_AD_ILLEGAL_PARAMETER;
return 0;
}
ilen = *d;
d++;
/* Consistency check */
if (ilen + 1 != len) {
SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,
SSL_R_RENEGOTIATION_ENCODING_ERR);
*al = SSL_AD_ILLEGAL_PARAMETER;
return 0;
}
/* Check that the extension matches */
if (ilen != expected_len) {
SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,
SSL_R_RENEGOTIATION_MISMATCH);
*al = SSL_AD_HANDSHAKE_FAILURE;
return 0;
}
if (memcmp(d, s->s3->previous_client_finished,
s->s3->previous_client_finished_len)) {
SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,
SSL_R_RENEGOTIATION_MISMATCH);
*al = SSL_AD_HANDSHAKE_FAILURE;
return 0;
}
d += s->s3->previous_client_finished_len;
if (memcmp(d, s->s3->previous_server_finished,
s->s3->previous_server_finished_len)) {
SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,
SSL_R_RENEGOTIATION_MISMATCH);
*al = SSL_AD_ILLEGAL_PARAMETER;
return 0;
}
#ifdef OPENSSL_RI_DEBUG
fprintf(stderr, "%s RI extension received by client\n",
ilen ? "Non-empty" : "Empty");
#endif
s->s3->send_connection_binding = 1;
return 1;
}
