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112 lines
3.1 KiB
C++
112 lines
3.1 KiB
C++
// Copyright 2012 The Chromium Authors
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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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#include <stddef.h>
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#include "base/memory/ptr_util.h"
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#include "base/notreached.h"
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#include "base/pickle.h"
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#include "crypto/openssl_util.h"
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#include "third_party/boringssl/src/include/openssl/mem.h"
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#include "third_party/boringssl/src/include/openssl/sha.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() { SHA256_Init(&ctx_); }
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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(base::span<const uint8_t> input) override {
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SHA256_Update(&ctx_, input.data(), input.size());
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}
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void Finish(base::span<uint8_t> output) override {
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ScopedOpenSSLSafeSizeBuffer<SHA256_DIGEST_LENGTH> result(output.data(),
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output.size());
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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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class SecureHashSHA512 : public SecureHash {
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public:
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SecureHashSHA512() { SHA512_Init(&ctx_); }
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SecureHashSHA512(const SecureHashSHA512& other) {
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memcpy(&ctx_, &other.ctx_, sizeof(ctx_));
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}
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~SecureHashSHA512() override { OPENSSL_cleanse(&ctx_, sizeof(ctx_)); }
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void Update(base::span<const uint8_t> input) override {
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SHA512_Update(&ctx_, input.data(), input.size());
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}
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void Finish(base::span<uint8_t> output) override {
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ScopedOpenSSLSafeSizeBuffer<SHA512_DIGEST_LENGTH> result(output.data(),
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output.size());
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SHA512_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<SecureHashSHA512>(*this);
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}
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size_t GetHashLength() const override { return SHA512_DIGEST_LENGTH; }
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private:
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SHA512_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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case SHA512:
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return std::make_unique<SecureHashSHA512>();
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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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void SecureHash::Update(const void* input, size_t len) {
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// SAFETY: This API is deprecated & being migrated away from. It can't be
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// safely implemented at the moment.
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// TODO(https://crbug.com/364687923): Remove this.
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return Update(UNSAFE_BUFFERS(
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base::span<const uint8_t>(static_cast<const uint8_t*>(input), len)));
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}
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void SecureHash::Finish(void* output, size_t len) {
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// SAFETY: This API is deprecated & being migrated away from. It can't be
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// safely implemented at the moment.
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// TODO(https://crbug.com/364687923): Remove this.
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return Finish(
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UNSAFE_BUFFERS(base::span<uint8_t>(static_cast<uint8_t*>(output), len)));
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}
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} // namespace crypto
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