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292 lines
11 KiB
292 lines
11 KiB
/* 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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|
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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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|
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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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