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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "base/crypto/secure_hash.h" | |
| 6 | |
| 7 #include <openssl/ssl.h> | |
| 8 | |
| 9 #include "base/basictypes.h" | |
| 10 #include "base/logging.h" | |
| 11 #include "base/openssl_util.h" | |
| 12 | |
| 13 namespace base { | |
| 14 | |
| 15 namespace { | |
| 16 | |
| 17 class SecureHashSHA256OpenSSL : public SecureHash { | |
| 18 public: | |
| 19 SecureHashSHA256OpenSSL() { | |
| 20 SHA256_Init(&ctx_); | |
| 21 } | |
| 22 | |
| 23 virtual ~SecureHashSHA256OpenSSL() { | |
| 24 OPENSSL_cleanse(&ctx_, sizeof(ctx_)); | |
| 25 } | |
| 26 | |
| 27 virtual void Update(const void* input, size_t len) { | |
| 28 SHA256_Update(&ctx_, static_cast<const unsigned char*>(input), len); | |
| 29 } | |
| 30 | |
| 31 virtual void Finish(void* output, size_t len) { | |
| 32 ScopedOpenSSLSafeSizeBuffer<SHA256_DIGEST_LENGTH> result( | |
| 33 static_cast<unsigned char*>(output), len); | |
| 34 SHA256_Final(result.safe_buffer(), &ctx_); | |
| 35 } | |
| 36 | |
| 37 private: | |
| 38 SHA256_CTX ctx_; | |
| 39 }; | |
| 40 | |
| 41 } // namespace | |
| 42 | |
| 43 SecureHash* SecureHash::Create(Algorithm algorithm) { | |
| 44 switch (algorithm) { | |
| 45 case SHA256: | |
| 46 return new SecureHashSHA256OpenSSL(); | |
| 47 default: | |
| 48 NOTIMPLEMENTED(); | |
| 49 return NULL; | |
| 50 } | |
| 51 } | |
| 52 | |
| 53 } // namespace base | |
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