a4e9f8d332
With SSL 3.0 gone, there's no need to split up MD5 and SHA-1. Change-Id: Ia4236c738dfa6743f1028c2d53761c95cba96288 Reviewed-on: https://boringssl-review.googlesource.com/29744 Commit-Queue: Steven Valdez <svaldez@google.com> Reviewed-by: Steven Valdez <svaldez@google.com> CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
265 lines
10 KiB
C++
265 lines
10 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 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 <openssl/buf.h>
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#include <openssl/digest.h>
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#include "internal.h"
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namespace bssl {
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SSLTranscript::SSLTranscript() {}
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SSLTranscript::~SSLTranscript() {}
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bool SSLTranscript::Init() {
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buffer_.reset(BUF_MEM_new());
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if (!buffer_) {
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return false;
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}
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hash_.Reset();
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return true;
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}
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// InitDigestWithData calls |EVP_DigestInit_ex| on |ctx| with |md| and then
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// writes the data in |buf| to it.
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static bool InitDigestWithData(EVP_MD_CTX *ctx, const EVP_MD *md,
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const BUF_MEM *buf) {
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if (!EVP_DigestInit_ex(ctx, md, NULL)) {
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return false;
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}
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EVP_DigestUpdate(ctx, buf->data, buf->length);
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return true;
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}
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bool SSLTranscript::InitHash(uint16_t version, const SSL_CIPHER *cipher) {
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const EVP_MD *md = ssl_get_handshake_digest(version, cipher);
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return InitDigestWithData(hash_.get(), md, buffer_.get());
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}
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void SSLTranscript::FreeBuffer() {
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buffer_.reset();
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}
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size_t SSLTranscript::DigestLen() const {
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return EVP_MD_size(Digest());
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}
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const EVP_MD *SSLTranscript::Digest() const {
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return EVP_MD_CTX_md(hash_.get());
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}
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bool SSLTranscript::UpdateForHelloRetryRequest() {
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if (buffer_) {
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buffer_->length = 0;
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}
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uint8_t old_hash[EVP_MAX_MD_SIZE];
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size_t hash_len;
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if (!GetHash(old_hash, &hash_len)) {
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return false;
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}
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const uint8_t header[4] = {SSL3_MT_MESSAGE_HASH, 0, 0,
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static_cast<uint8_t>(hash_len)};
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if (!EVP_DigestInit_ex(hash_.get(), Digest(), nullptr) ||
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!Update(header) ||
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!Update(MakeConstSpan(old_hash, hash_len))) {
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return false;
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}
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return true;
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}
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bool SSLTranscript::CopyHashContext(EVP_MD_CTX *ctx) {
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return EVP_MD_CTX_copy_ex(ctx, hash_.get());
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}
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bool SSLTranscript::Update(Span<const uint8_t> in) {
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// Depending on the state of the handshake, either the handshake buffer may be
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// active, the rolling hash, or both.
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if (buffer_ &&
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!BUF_MEM_append(buffer_.get(), in.data(), in.size())) {
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return false;
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}
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if (EVP_MD_CTX_md(hash_.get()) != NULL) {
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EVP_DigestUpdate(hash_.get(), in.data(), in.size());
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}
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return true;
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}
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bool SSLTranscript::GetHash(uint8_t *out, size_t *out_len) {
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ScopedEVP_MD_CTX ctx;
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unsigned len;
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if (!EVP_MD_CTX_copy_ex(ctx.get(), hash_.get()) ||
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!EVP_DigestFinal_ex(ctx.get(), out, &len)) {
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return false;
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}
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*out_len = len;
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return true;
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}
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bool SSLTranscript::GetFinishedMAC(uint8_t *out, size_t *out_len,
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const SSL_SESSION *session,
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bool from_server) {
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static const char kClientLabel[] = "client finished";
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static const char kServerLabel[] = "server finished";
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auto label = from_server
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? MakeConstSpan(kServerLabel, sizeof(kServerLabel) - 1)
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: MakeConstSpan(kClientLabel, sizeof(kClientLabel) - 1);
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uint8_t digest[EVP_MAX_MD_SIZE];
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size_t digest_len;
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if (!GetHash(digest, &digest_len)) {
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return false;
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}
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static const size_t kFinishedLen = 12;
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if (!tls1_prf(Digest(), MakeSpan(out, kFinishedLen),
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MakeConstSpan(session->master_key, session->master_key_length),
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label, MakeConstSpan(digest, digest_len), {})) {
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return false;
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}
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*out_len = kFinishedLen;
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return true;
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}
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} // namespace bssl
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