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Diffstat (limited to 'src/ssl/t1_reneg.c')
| -rw-r--r-- | src/ssl/t1_reneg.c | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/src/ssl/t1_reneg.c b/src/ssl/t1_reneg.c new file mode 100644 index 0000000..d0009c1 --- /dev/null +++ b/src/ssl/t1_reneg.c @@ -0,0 +1,246 @@ +/* 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; +} |