/* 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 <assert.h>
#include <stdio.h>
#include <string.h>
#include <openssl/bytestring.h>
#include <openssl/err.h>
#include "internal.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) {
OPENSSL_PUT_ERROR(SSL, 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);
}
*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, CBS *cbs, int *out_alert) {
CBS renegotiated_connection;
if (!CBS_get_u8_length_prefixed(cbs, &renegotiated_connection) ||
CBS_len(cbs) != 0) {
OPENSSL_PUT_ERROR(SSL, ssl_parse_clienthello_renegotiate_ext,
SSL_R_RENEGOTIATION_ENCODING_ERR);
*out_alert = SSL_AD_DECODE_ERROR;
return 0;
}
/* Check that the extension matches */
if (!CBS_mem_equal(&renegotiated_connection, s->s3->previous_client_finished,
s->s3->previous_client_finished_len)) {
OPENSSL_PUT_ERROR(SSL, ssl_parse_clienthello_renegotiate_ext,
SSL_R_RENEGOTIATION_MISMATCH);
*out_alert = SSL_AD_HANDSHAKE_FAILURE;
return 0;
}
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) {
OPENSSL_PUT_ERROR(SSL, 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);
}
*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, CBS *cbs, int *out_alert) {
int expected_len =
s->s3->previous_client_finished_len + s->s3->previous_server_finished_len;
CBS renegotiated_connection;
const uint8_t *d;
/* Check for logic errors */
assert(!expected_len || s->s3->previous_client_finished_len);
assert(!expected_len || s->s3->previous_server_finished_len);
/* Parse out the extension contents. */
if (!CBS_get_u8_length_prefixed(cbs, &renegotiated_connection) ||
CBS_len(cbs) != 0) {
OPENSSL_PUT_ERROR(SSL, ssl_parse_serverhello_renegotiate_ext,
SSL_R_RENEGOTIATION_ENCODING_ERR);
*out_alert = SSL_AD_ILLEGAL_PARAMETER;
return 0;
}
/* Check that the extension matches. */
if (CBS_len(&renegotiated_connection) != expected_len) {
OPENSSL_PUT_ERROR(SSL, ssl_parse_serverhello_renegotiate_ext,
SSL_R_RENEGOTIATION_MISMATCH);
*out_alert = SSL_AD_HANDSHAKE_FAILURE;
return 0;
}
d = CBS_data(&renegotiated_connection);
if (memcmp(d, s->s3->previous_client_finished,
s->s3->previous_client_finished_len)) {
OPENSSL_PUT_ERROR(SSL, ssl_parse_serverhello_renegotiate_ext,
SSL_R_RENEGOTIATION_MISMATCH);
*out_alert = 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)) {
OPENSSL_PUT_ERROR(SSL, ssl_parse_serverhello_renegotiate_ext,
SSL_R_RENEGOTIATION_MISMATCH);
*out_alert = SSL_AD_ILLEGAL_PARAMETER;
return 0;
}
s->s3->send_connection_binding = 1;
return 1;
}