/* 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 <assert.h>
#include <string.h>
#include <openssl/buf.h>
#include <openssl/digest.h>
#include <openssl/err.h>
#include <openssl/mem.h>
#include <openssl/md5.h>
#include <openssl/nid.h>
#include <openssl/sha.h>
#include "../crypto/internal.h"
#include "internal.h"
namespace bssl {
SSLTranscript::SSLTranscript() {}
SSLTranscript::~SSLTranscript() {}
bool SSLTranscript::Init() {
buffer_.reset(BUF_MEM_new());
if (!buffer_) {
return false;
}
hash_.Reset();
md5_.Reset();
return true;
}
// InitDigestWithData calls |EVP_DigestInit_ex| on |ctx| with |md| and then
// writes the data in |buf| to it.
static bool InitDigestWithData(EVP_MD_CTX *ctx, const EVP_MD *md,
const BUF_MEM *buf) {
if (!EVP_DigestInit_ex(ctx, md, NULL)) {
return false;
}
EVP_DigestUpdate(ctx, buf->data, buf->length);
return true;
}
bool SSLTranscript::InitHash(uint16_t version, const SSL_CIPHER *cipher) {
const EVP_MD *md = ssl_get_handshake_digest(version, cipher);
// To support SSL 3.0's Finished and CertificateVerify constructions,
// EVP_md5_sha1() is split into MD5 and SHA-1 halves. When SSL 3.0 is removed,
// we can simplify this.
if (md == EVP_md5_sha1()) {
if (!InitDigestWithData(md5_.get(), EVP_md5(), buffer_.get())) {
return false;
}
md = EVP_sha1();
}
return InitDigestWithData(hash_.get(), md, buffer_.get());
}
void SSLTranscript::FreeBuffer() {
buffer_.reset();
}
size_t SSLTranscript::DigestLen() const {
return EVP_MD_size(Digest());
}
const EVP_MD *SSLTranscript::Digest() const {
if (EVP_MD_CTX_md(md5_.get()) != nullptr) {
return EVP_md5_sha1();
}
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::CopyHashContext(EVP_MD_CTX *ctx) {
return EVP_MD_CTX_copy_ex(ctx, hash_.get());
}
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());
}
if (EVP_MD_CTX_md(md5_.get()) != NULL) {
EVP_DigestUpdate(md5_.get(), in.data(), in.size());
}
return true;
}
bool SSLTranscript::GetHash(uint8_t *out, size_t *out_len) {
ScopedEVP_MD_CTX ctx;
unsigned md5_len = 0;
if (EVP_MD_CTX_md(md5_.get()) != NULL) {
if (!EVP_MD_CTX_copy_ex(ctx.get(), md5_.get()) ||
!EVP_DigestFinal_ex(ctx.get(), out, &md5_len)) {
return false;
}
}
unsigned len;
if (!EVP_MD_CTX_copy_ex(ctx.get(), hash_.get()) ||
!EVP_DigestFinal_ex(ctx.get(), out + md5_len, &len)) {
return false;
}
*out_len = md5_len + len;
return true;
}
static bool SSL3HandshakeMAC(const SSL_SESSION *session,
const EVP_MD_CTX *ctx_template, const char *sender,
size_t sender_len, uint8_t *p, size_t *out_len) {
ScopedEVP_MD_CTX ctx;
if (!EVP_MD_CTX_copy_ex(ctx.get(), ctx_template)) {
OPENSSL_PUT_ERROR(SSL, ERR_LIB_EVP);
return false;
}
static const uint8_t kPad1[48] = {
0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
};
static const uint8_t kPad2[48] = {
0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c,
0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c,
0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c,
0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c,
};
size_t n = EVP_MD_CTX_size(ctx.get());
size_t npad = (48 / n) * n;
EVP_DigestUpdate(ctx.get(), sender, sender_len);
EVP_DigestUpdate(ctx.get(), session->master_key, session->master_key_length);
EVP_DigestUpdate(ctx.get(), kPad1, npad);
unsigned md_buf_len;
uint8_t md_buf[EVP_MAX_MD_SIZE];
EVP_DigestFinal_ex(ctx.get(), md_buf, &md_buf_len);
if (!EVP_DigestInit_ex(ctx.get(), EVP_MD_CTX_md(ctx.get()), NULL)) {
OPENSSL_PUT_ERROR(SSL, ERR_LIB_EVP);
return false;
}
EVP_DigestUpdate(ctx.get(), session->master_key, session->master_key_length);
EVP_DigestUpdate(ctx.get(), kPad2, npad);
EVP_DigestUpdate(ctx.get(), md_buf, md_buf_len);
unsigned len;
EVP_DigestFinal_ex(ctx.get(), p, &len);
*out_len = len;
return true;
}
bool SSLTranscript::GetSSL3CertVerifyHash(uint8_t *out, size_t *out_len,
const SSL_SESSION *session,
uint16_t signature_algorithm) {
if (Digest() != EVP_md5_sha1()) {
OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
return false;
}
if (signature_algorithm == SSL_SIGN_RSA_PKCS1_MD5_SHA1) {
size_t md5_len, len;
if (!SSL3HandshakeMAC(session, md5_.get(), NULL, 0, out, &md5_len) ||
!SSL3HandshakeMAC(session, hash_.get(), NULL, 0, out + md5_len, &len)) {
return false;
}
*out_len = md5_len + len;
return true;
}
if (signature_algorithm == SSL_SIGN_ECDSA_SHA1) {
return SSL3HandshakeMAC(session, hash_.get(), NULL, 0, out, out_len);
}
OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
return false;
}
bool SSLTranscript::GetFinishedMAC(uint8_t *out, size_t *out_len,
const SSL_SESSION *session,
bool from_server) {
if (session->ssl_version == SSL3_VERSION) {
if (Digest() != EVP_md5_sha1()) {
OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
return false;
}
const char *sender = from_server ? SSL3_MD_SERVER_FINISHED_CONST
: SSL3_MD_CLIENT_FINISHED_CONST;
const size_t sender_len = 4;
size_t md5_len, len;
if (!SSL3HandshakeMAC(session, md5_.get(), sender, sender_len, out,
&md5_len) ||
!SSL3HandshakeMAC(session, hash_.get(), sender, sender_len,
out + md5_len, &len)) {
return false;
}
*out_len = md5_len + len;
return true;
}
// At this point, the handshake should have released the handshake buffer on
// its own.
assert(!buffer_);
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 digests[EVP_MAX_MD_SIZE];
size_t digests_len;
if (!GetHash(digests, &digests_len)) {
return false;
}
static const size_t kFinishedLen = 12;
if (!tls1_prf(Digest(), MakeSpan(out, kFinishedLen),
MakeConstSpan(session->master_key, session->master_key_length),
label, MakeConstSpan(digests, digests_len), {})) {
return false;
}
*out_len = kFinishedLen;
return true;
}
} // namespace bssl