ref: 98c1cd7ae022efe276123898af6b892eade0732c
dir: /third_party/boringssl/src/ssl/ssl_transcript.cc/
/* 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) 1998-2007 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).
*
*/
/* ====================================================================
* Copyright 2005 Nokia. All rights reserved.
*
* The portions of the attached software ("Contribution") is developed by
* Nokia Corporation and is licensed pursuant to the OpenSSL open source
* license.
*
* The Contribution, originally written by Mika Kousa and Pasi Eronen of
* Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
* support (see RFC 4279) to OpenSSL.
*
* No patent licenses or other rights except those expressly stated in
* the OpenSSL open source license shall be deemed granted or received
* expressly, by implication, estoppel, or otherwise.
*
* No assurances are provided by Nokia that the Contribution does not
* infringe the patent or other intellectual property rights of any third
* party or that the license provides you with all the necessary rights
* to make use of the Contribution.
*
* THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
* ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
* SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
* OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
* OTHERWISE. */
#include <openssl/ssl.h>
#include <openssl/buf.h>
#include <openssl/digest.h>
#include <openssl/err.h>
#include "internal.h"
BSSL_NAMESPACE_BEGIN
SSLTranscript::SSLTranscript() {}
SSLTranscript::~SSLTranscript() {}
bool SSLTranscript::Init() {
buffer_.reset(BUF_MEM_new());
if (!buffer_) {
return false;
}
hash_.Reset();
return true;
}
bool SSLTranscript::InitHash(uint16_t version, const SSL_CIPHER *cipher) {
const EVP_MD *md = ssl_get_handshake_digest(version, cipher);
if (Digest() == md) {
// No need to re-hash the buffer.
return true;
}
return EVP_DigestInit_ex(hash_.get(), md, nullptr) &&
EVP_DigestUpdate(hash_.get(), buffer_->data, buffer_->length);
}
void SSLTranscript::FreeBuffer() {
buffer_.reset();
}
size_t SSLTranscript::DigestLen() const {
return EVP_MD_size(Digest());
}
const EVP_MD *SSLTranscript::Digest() const {
return EVP_MD_CTX_md(hash_.get());
}
bool SSLTranscript::UpdateForHelloRetryRequest() {
if (buffer_) {
buffer_->length = 0;
}
uint8_t old_hash[EVP_MAX_MD_SIZE];
size_t hash_len;
if (!GetHash(old_hash, &hash_len)) {
return false;
}
const uint8_t header[4] = {SSL3_MT_MESSAGE_HASH, 0, 0,
static_cast<uint8_t>(hash_len)};
if (!EVP_DigestInit_ex(hash_.get(), Digest(), nullptr) ||
!Update(header) ||
!Update(MakeConstSpan(old_hash, hash_len))) {
return false;
}
return true;
}
bool SSLTranscript::CopyToHashContext(EVP_MD_CTX *ctx,
const EVP_MD *digest) const {
const EVP_MD *transcript_digest = Digest();
if (transcript_digest != nullptr &&
EVP_MD_type(transcript_digest) == EVP_MD_type(digest)) {
return EVP_MD_CTX_copy_ex(ctx, hash_.get());
}
if (buffer_) {
return EVP_DigestInit_ex(ctx, digest, nullptr) &&
EVP_DigestUpdate(ctx, buffer_->data, buffer_->length);
}
OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
return false;
}
bool SSLTranscript::Update(Span<const uint8_t> in) {
// Depending on the state of the handshake, either the handshake buffer may be
// active, the rolling hash, or both.
if (buffer_ &&
!BUF_MEM_append(buffer_.get(), in.data(), in.size())) {
return false;
}
if (EVP_MD_CTX_md(hash_.get()) != NULL) {
EVP_DigestUpdate(hash_.get(), in.data(), in.size());
}
return true;
}
bool SSLTranscript::GetHash(uint8_t *out, size_t *out_len) const {
ScopedEVP_MD_CTX ctx;
unsigned len;
if (!EVP_MD_CTX_copy_ex(ctx.get(), hash_.get()) ||
!EVP_DigestFinal_ex(ctx.get(), out, &len)) {
return false;
}
*out_len = len;
return true;
}
bool SSLTranscript::GetFinishedMAC(uint8_t *out, size_t *out_len,
const SSL_SESSION *session,
bool from_server) const {
static const char kClientLabel[] = "client finished";
static const char kServerLabel[] = "server finished";
auto label = from_server
? MakeConstSpan(kServerLabel, sizeof(kServerLabel) - 1)
: MakeConstSpan(kClientLabel, sizeof(kClientLabel) - 1);
uint8_t digest[EVP_MAX_MD_SIZE];
size_t digest_len;
if (!GetHash(digest, &digest_len)) {
return false;
}
static const size_t kFinishedLen = 12;
if (!tls1_prf(Digest(), MakeSpan(out, kFinishedLen),
MakeConstSpan(session->secret, session->secret_length), label,
MakeConstSpan(digest, digest_len), {})) {
return false;
}
*out_len = kFinishedLen;
return true;
}
BSSL_NAMESPACE_END