1fd39d84cf
This implements the cipher suite constraints in "fake TLS 1.3". It also makes bssl_shim and runner enable it by default so we can start adding MaxVersion: VersionTLS12 markers to tests as 1.2 vs. 1.3 differences begin to take effect. Change-Id: If1caf6e43938c8d15b0a0f39f40963b8199dcef5 Reviewed-on: https://boringssl-review.googlesource.com/8340 Reviewed-by: David Benjamin <davidben@google.com>
377 lines
13 KiB
C
377 lines
13 KiB
C
/* 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) 1998-2007 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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/* ====================================================================
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* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
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*
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* Portions of the attached software ("Contribution") are developed by
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* SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
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*
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* The Contribution is licensed pursuant to the OpenSSL open source
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* license provided above.
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*
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* ECC cipher suite support in OpenSSL originally written by
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* Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
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*
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*/
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/* ====================================================================
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* Copyright 2005 Nokia. All rights reserved.
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*
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* The portions of the attached software ("Contribution") is developed by
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* Nokia Corporation and is licensed pursuant to the OpenSSL open source
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* license.
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*
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* The Contribution, originally written by Mika Kousa and Pasi Eronen of
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* Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
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* support (see RFC 4279) to OpenSSL.
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*
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* No patent licenses or other rights except those expressly stated in
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* the OpenSSL open source license shall be deemed granted or received
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* expressly, by implication, estoppel, or otherwise.
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*
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* No assurances are provided by Nokia that the Contribution does not
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* infringe the patent or other intellectual property rights of any third
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* party or that the license provides you with all the necessary rights
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* to make use of the Contribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
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* ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
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* SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
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* OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
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* OTHERWISE. */
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#include <openssl/ssl.h>
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#include <assert.h>
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#include <string.h>
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#include <openssl/buf.h>
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#include <openssl/dh.h>
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#include <openssl/digest.h>
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#include <openssl/err.h>
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#include <openssl/md5.h>
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#include <openssl/mem.h>
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#include <openssl/nid.h>
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#include "internal.h"
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int ssl3_supports_cipher(const SSL_CIPHER *cipher) {
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return 1;
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}
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int ssl3_set_handshake_header(SSL *ssl, int htype, unsigned long len) {
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uint8_t *p = (uint8_t *)ssl->init_buf->data;
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*(p++) = htype;
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l2n3(len, p);
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ssl->init_num = (int)len + SSL3_HM_HEADER_LENGTH;
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/* Add the message to the handshake hash. */
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return ssl3_update_handshake_hash(ssl, (uint8_t *)ssl->init_buf->data,
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ssl->init_num);
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}
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int ssl3_handshake_write(SSL *ssl) {
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return ssl3_do_write(ssl, SSL3_RT_HANDSHAKE);
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}
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void ssl3_expect_flight(SSL *ssl) {}
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void ssl3_received_flight(SSL *ssl) {}
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int ssl3_new(SSL *ssl) {
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SSL3_STATE *s3;
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s3 = OPENSSL_malloc(sizeof *s3);
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if (s3 == NULL) {
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goto err;
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}
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memset(s3, 0, sizeof *s3);
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EVP_MD_CTX_init(&s3->handshake_hash);
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EVP_MD_CTX_init(&s3->handshake_md5);
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ssl->s3 = s3;
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/* Set the version to the highest supported version.
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*
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* TODO(davidben): Move this field into |s3|, have it store the normalized
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* protocol version, and implement this pre-negotiation quirk in |SSL_version|
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* at the API boundary rather than in internal state. */
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ssl->version = TLS1_2_VERSION;
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return 1;
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err:
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return 0;
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}
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void ssl3_free(SSL *ssl) {
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if (ssl == NULL || ssl->s3 == NULL) {
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return;
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}
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ssl3_cleanup_key_block(ssl);
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ssl_read_buffer_clear(ssl);
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ssl_write_buffer_clear(ssl);
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SSL_ECDH_CTX_cleanup(&ssl->s3->tmp.ecdh_ctx);
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OPENSSL_free(ssl->s3->tmp.peer_key);
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sk_X509_NAME_pop_free(ssl->s3->tmp.ca_names, X509_NAME_free);
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OPENSSL_free(ssl->s3->tmp.certificate_types);
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OPENSSL_free(ssl->s3->tmp.peer_supported_group_list);
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OPENSSL_free(ssl->s3->tmp.peer_psk_identity_hint);
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ssl3_free_handshake_buffer(ssl);
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ssl3_free_handshake_hash(ssl);
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OPENSSL_free(ssl->s3->next_proto_negotiated);
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OPENSSL_free(ssl->s3->alpn_selected);
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SSL_AEAD_CTX_free(ssl->s3->aead_read_ctx);
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SSL_AEAD_CTX_free(ssl->s3->aead_write_ctx);
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OPENSSL_cleanse(ssl->s3, sizeof *ssl->s3);
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OPENSSL_free(ssl->s3);
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ssl->s3 = NULL;
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}
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struct ssl_cipher_preference_list_st *ssl_get_cipher_preferences(SSL *ssl) {
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if (ssl->cipher_list != NULL) {
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return ssl->cipher_list;
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}
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if (ssl->version >= TLS1_1_VERSION && ssl->ctx->cipher_list_tls11 != NULL) {
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return ssl->ctx->cipher_list_tls11;
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}
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if (ssl->version >= TLS1_VERSION && ssl->ctx->cipher_list_tls10 != NULL) {
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return ssl->ctx->cipher_list_tls10;
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}
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if (ssl->ctx->cipher_list != NULL) {
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return ssl->ctx->cipher_list;
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}
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return NULL;
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}
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const SSL_CIPHER *ssl3_choose_cipher(
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SSL *ssl, STACK_OF(SSL_CIPHER) *clnt,
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struct ssl_cipher_preference_list_st *server_pref) {
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const SSL_CIPHER *c, *ret = NULL;
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STACK_OF(SSL_CIPHER) *srvr = server_pref->ciphers, *prio, *allow;
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size_t i;
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int ok;
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size_t cipher_index;
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uint32_t alg_k, alg_a, mask_k, mask_a;
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/* in_group_flags will either be NULL, or will point to an array of bytes
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* which indicate equal-preference groups in the |prio| stack. See the
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* comment about |in_group_flags| in the |ssl_cipher_preference_list_st|
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* struct. */
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const uint8_t *in_group_flags;
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/* group_min contains the minimal index so far found in a group, or -1 if no
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* such value exists yet. */
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int group_min = -1;
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if (ssl->options & SSL_OP_CIPHER_SERVER_PREFERENCE) {
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prio = srvr;
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in_group_flags = server_pref->in_group_flags;
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allow = clnt;
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} else {
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prio = clnt;
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in_group_flags = NULL;
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allow = srvr;
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}
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ssl_get_compatible_server_ciphers(ssl, &mask_k, &mask_a);
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for (i = 0; i < sk_SSL_CIPHER_num(prio); i++) {
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c = sk_SSL_CIPHER_value(prio, i);
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ok = 1;
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/* Check the TLS version. */
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if (SSL_CIPHER_get_min_version(c) > ssl3_protocol_version(ssl) ||
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SSL_CIPHER_get_max_version(c) < ssl3_protocol_version(ssl)) {
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ok = 0;
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}
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alg_k = c->algorithm_mkey;
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alg_a = c->algorithm_auth;
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ok = ok && (alg_k & mask_k) && (alg_a & mask_a);
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if (ok && sk_SSL_CIPHER_find(allow, &cipher_index, c)) {
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if (in_group_flags != NULL && in_group_flags[i] == 1) {
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/* This element of |prio| is in a group. Update the minimum index found
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* so far and continue looking. */
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if (group_min == -1 || (size_t)group_min > cipher_index) {
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group_min = cipher_index;
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}
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} else {
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if (group_min != -1 && (size_t)group_min < cipher_index) {
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cipher_index = group_min;
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}
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ret = sk_SSL_CIPHER_value(allow, cipher_index);
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break;
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}
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}
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if (in_group_flags != NULL && in_group_flags[i] == 0 && group_min != -1) {
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/* We are about to leave a group, but we found a match in it, so that's
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* our answer. */
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ret = sk_SSL_CIPHER_value(allow, group_min);
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break;
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}
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}
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return ret;
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}
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int ssl3_get_req_cert_type(SSL *ssl, uint8_t *p) {
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int ret = 0;
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const uint8_t *sig;
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size_t i, siglen;
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int have_rsa_sign = 0;
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int have_ecdsa_sign = 0;
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/* get configured sigalgs */
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siglen = tls12_get_psigalgs(ssl, &sig);
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for (i = 0; i < siglen; i += 2, sig += 2) {
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switch (sig[1]) {
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case TLSEXT_signature_rsa:
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have_rsa_sign = 1;
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break;
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case TLSEXT_signature_ecdsa:
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have_ecdsa_sign = 1;
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break;
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}
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}
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if (have_rsa_sign) {
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p[ret++] = SSL3_CT_RSA_SIGN;
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}
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/* ECDSA certs can be used with RSA cipher suites as well so we don't need to
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* check for SSL_kECDH or SSL_kECDHE. */
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if (ssl->version >= TLS1_VERSION && have_ecdsa_sign) {
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p[ret++] = TLS_CT_ECDSA_SIGN;
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}
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return ret;
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}
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/* If we are using default SHA1+MD5 algorithms switch to new SHA256 PRF and
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* handshake macs if required. */
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uint32_t ssl_get_algorithm_prf(const SSL *ssl) {
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uint32_t algorithm_prf = ssl->s3->tmp.new_cipher->algorithm_prf;
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if (algorithm_prf == SSL_HANDSHAKE_MAC_DEFAULT &&
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ssl3_protocol_version(ssl) >= TLS1_2_VERSION) {
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return SSL_HANDSHAKE_MAC_SHA256;
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}
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return algorithm_prf;
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}
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