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71 lines
1.6 KiB
71 lines
1.6 KiB
4 months ago
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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "crypto/secure_hash.h"
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#if defined(OPENSSL_IS_BORINGSSL)
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#include <openssl/mem.h>
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#else
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#include <openssl/crypto.h>
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#endif
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#include <openssl/sha.h>
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#include <stddef.h>
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#include "base/logging.h"
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#include "base/memory/ptr_util.h"
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#include "base/pickle.h"
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#include "crypto/openssl_util.h"
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namespace crypto {
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namespace {
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class SecureHashSHA256 : public SecureHash {
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public:
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SecureHashSHA256() {
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SHA256_Init(&ctx_);
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}
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SecureHashSHA256(const SecureHashSHA256& other) {
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memcpy(&ctx_, &other.ctx_, sizeof(ctx_));
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}
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~SecureHashSHA256() override {
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OPENSSL_cleanse(&ctx_, sizeof(ctx_));
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}
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void Update(const void* input, size_t len) override {
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SHA256_Update(&ctx_, static_cast<const unsigned char*>(input), len);
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}
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void Finish(void* output, size_t len) override {
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ScopedOpenSSLSafeSizeBuffer<SHA256_DIGEST_LENGTH> result(
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static_cast<unsigned char*>(output), len);
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SHA256_Final(result.safe_buffer(), &ctx_);
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}
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std::unique_ptr<SecureHash> Clone() const override {
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return std::make_unique<SecureHashSHA256>(*this);
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}
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size_t GetHashLength() const override { return SHA256_DIGEST_LENGTH; }
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private:
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SHA256_CTX ctx_;
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};
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} // namespace
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std::unique_ptr<SecureHash> SecureHash::Create(Algorithm algorithm) {
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switch (algorithm) {
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case SHA256:
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return std::make_unique<SecureHashSHA256>();
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default:
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NOTIMPLEMENTED();
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return nullptr;
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}
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}
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} // namespace crypto
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