blob: 2a5a1f02089e6f1ddd24523ab6f39fd31bea744a [file] [log] [blame]
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "crypto/secure_hash.h"
#include <openssl/mem.h>
#include <openssl/sha.h>
#include <stddef.h>
#include "base/logging.h"
#include "base/pickle.h"
#include "crypto/openssl_util.h"
namespace crypto {
namespace {
class SecureHashSHA256 : public SecureHash {
SecureHashSHA256() {
SecureHashSHA256(const SecureHashSHA256& other) {
memcpy(&ctx_, &other.ctx_, sizeof(ctx_));
~SecureHashSHA256() override {
OPENSSL_cleanse(&ctx_, sizeof(ctx_));
void Update(const void* input, size_t len) override {
SHA256_Update(&ctx_, static_cast<const unsigned char*>(input), len);
void Finish(void* output, size_t len) override {
ScopedOpenSSLSafeSizeBuffer<SHA256_DIGEST_LENGTH> result(
static_cast<unsigned char*>(output), len);
SHA256_Final(result.safe_buffer(), &ctx_);
SecureHash* Clone() const override {
return new SecureHashSHA256(*this);
size_t GetHashLength() const override { return SHA256_DIGEST_LENGTH; }
SHA256_CTX ctx_;
} // namespace
SecureHash* SecureHash::Create(Algorithm algorithm) {
switch (algorithm) {
case SHA256:
return new SecureHashSHA256();
return NULL;
} // namespace crypto