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