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+/* ssl/t1_reneg.c */
+/* 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 <stdio.h>
+#include <openssl/objects.h>
+#include "ssl_locl.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)
+ {
+ SSLerr(SSL_F_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);
+#ifdef OPENSSL_RI_DEBUG
+ fprintf(stderr, "%s RI extension sent by client\n",
+ s->s3->previous_client_finished_len ? "Non-empty" : "Empty");
+#endif
+ }
+
+ *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, unsigned char *d, int len,
+ int *al)
+ {
+ int ilen;
+
+ /* Parse the length byte */
+ if(len < 1)
+ {
+ SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_ENCODING_ERR);
+ *al=SSL_AD_ILLEGAL_PARAMETER;
+ return 0;
+ }
+ ilen = *d;
+ d++;
+
+ /* Consistency check */
+ if((ilen+1) != len)
+ {
+ SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_ENCODING_ERR);
+ *al=SSL_AD_ILLEGAL_PARAMETER;
+ return 0;
+ }
+
+ /* Check that the extension matches */
+ if(ilen != s->s3->previous_client_finished_len)
+ {
+ SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_MISMATCH);
+ *al=SSL_AD_HANDSHAKE_FAILURE;
+ return 0;
+ }
+
+ if(memcmp(d, s->s3->previous_client_finished,
+ s->s3->previous_client_finished_len))
+ {
+ SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_MISMATCH);
+ *al=SSL_AD_HANDSHAKE_FAILURE;
+ return 0;
+ }
+#ifdef OPENSSL_RI_DEBUG
+ fprintf(stderr, "%s RI extension received by server\n",
+ ilen ? "Non-empty" : "Empty");
+#endif
+
+ 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)
+ {
+ SSLerr(SSL_F_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);
+#ifdef OPENSSL_RI_DEBUG
+ fprintf(stderr, "%s RI extension sent by server\n",
+ s->s3->previous_client_finished_len ? "Non-empty" : "Empty");
+#endif
+ }
+
+ *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, unsigned char *d, int len,
+ int *al)
+ {
+ int expected_len=s->s3->previous_client_finished_len
+ + s->s3->previous_server_finished_len;
+ int ilen;
+
+ /* Check for logic errors */
+ OPENSSL_assert(!expected_len || s->s3->previous_client_finished_len);
+ OPENSSL_assert(!expected_len || s->s3->previous_server_finished_len);
+
+ /* Parse the length byte */
+ if(len < 1)
+ {
+ SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_ENCODING_ERR);
+ *al=SSL_AD_ILLEGAL_PARAMETER;
+ return 0;
+ }
+ ilen = *d;
+ d++;
+
+ /* Consistency check */
+ if(ilen+1 != len)
+ {
+ SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_ENCODING_ERR);
+ *al=SSL_AD_ILLEGAL_PARAMETER;
+ return 0;
+ }
+
+ /* Check that the extension matches */
+ if(ilen != expected_len)
+ {
+ SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_MISMATCH);
+ *al=SSL_AD_HANDSHAKE_FAILURE;
+ return 0;
+ }
+
+ if(memcmp(d, s->s3->previous_client_finished,
+ s->s3->previous_client_finished_len))
+ {
+ SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_MISMATCH);
+ *al=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))
+ {
+ SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_MISMATCH);
+ *al=SSL_AD_ILLEGAL_PARAMETER;
+ return 0;
+ }
+#ifdef OPENSSL_RI_DEBUG
+ fprintf(stderr, "%s RI extension received by client\n",
+ ilen ? "Non-empty" : "Empty");
+#endif
+ s->s3->send_connection_binding=1;
+
+ return 1;
+ }