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-/* 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;
-}
generated by cgit v1.1 at 2024-12-22 09:23:24 +0000