| /* 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; |
| } |