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- // 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 <stddef.h>
- #include "base/memory/ptr_util.h"
- #include "base/notreached.h"
- #include "base/pickle.h"
- #include "crypto/openssl_util.h"
- #include "third_party/boringssl/src/include/openssl/mem.h"
- #include "third_party/boringssl/src/include/openssl/sha.h"
- namespace crypto {
- namespace {
- class SecureHashSHA256 : public SecureHash {
- public:
- SecureHashSHA256() {
- // Ensure that CPU features detection is performed before using
- // BoringSSL. This will enable hw accelerated implementations.
- EnsureOpenSSLInit();
- SHA256_Init(&ctx_);
- }
- 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_);
- }
- std::unique_ptr<SecureHash> Clone() const override {
- return std::make_unique<SecureHashSHA256>(*this);
- }
- size_t GetHashLength() const override { return SHA256_DIGEST_LENGTH; }
- private:
- SHA256_CTX ctx_;
- };
- class SecureHashSHA512 : public SecureHash {
- public:
- SecureHashSHA512() {
- // Ensure that CPU features detection is performed before using
- // BoringSSL. This will enable hw accelerated implementations.
- EnsureOpenSSLInit();
- SHA512_Init(&ctx_);
- }
- SecureHashSHA512(const SecureHashSHA512& other) {
- memcpy(&ctx_, &other.ctx_, sizeof(ctx_));
- }
- ~SecureHashSHA512() override { OPENSSL_cleanse(&ctx_, sizeof(ctx_)); }
- void Update(const void* input, size_t len) override {
- SHA512_Update(&ctx_, static_cast<const unsigned char*>(input), len);
- }
- void Finish(void* output, size_t len) override {
- ScopedOpenSSLSafeSizeBuffer<SHA512_DIGEST_LENGTH> result(
- static_cast<unsigned char*>(output), len);
- SHA512_Final(result.safe_buffer(), &ctx_);
- }
- std::unique_ptr<SecureHash> Clone() const override {
- return std::make_unique<SecureHashSHA512>(*this);
- }
- size_t GetHashLength() const override { return SHA512_DIGEST_LENGTH; }
- private:
- SHA512_CTX ctx_;
- };
- } // namespace
- std::unique_ptr<SecureHash> SecureHash::Create(Algorithm algorithm) {
- switch (algorithm) {
- case SHA256:
- return std::make_unique<SecureHashSHA256>();
- case SHA512:
- return std::make_unique<SecureHashSHA512>();
- default:
- NOTIMPLEMENTED();
- return nullptr;
- }
- }
- } // namespace crypto
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