| // 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 { |
| public: |
| SecureHashSHA256() { |
| 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_); |
| } |
| |
| SecureHash* Clone() const override { |
| return new SecureHashSHA256(*this); |
| } |
| |
| size_t GetHashLength() const override { return SHA256_DIGEST_LENGTH; } |
| |
| private: |
| SHA256_CTX ctx_; |
| }; |
| |
| } // namespace |
| |
| SecureHash* SecureHash::Create(Algorithm algorithm) { |
| switch (algorithm) { |
| case SHA256: |
| return new SecureHashSHA256(); |
| default: |
| NOTIMPLEMENTED(); |
| return NULL; |
| } |
| } |
| |
| } // namespace crypto |