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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 #ifndef BASE_CRYPTO_ENCRYPTOR_H_ | |
| 6 #define BASE_CRYPTO_ENCRYPTOR_H_ | |
| 7 #pragma once | |
| 8 | |
| 9 #include <string> | |
| 10 | |
| 11 #include "base/base_api.h" | |
| 12 #include "build/build_config.h" | |
| 13 | |
| 14 #if defined(USE_NSS) | |
| 15 #include "base/crypto/scoped_nss_types.h" | |
| 16 #elif defined(OS_WIN) | |
| 17 #include "base/crypto/scoped_capi_types.h" | |
| 18 #endif | |
| 19 | |
| 20 namespace base { | |
| 21 | |
| 22 class SymmetricKey; | |
| 23 | |
| 24 class BASE_API Encryptor { | |
| 25 public: | |
| 26 enum Mode { | |
| 27 CBC | |
| 28 }; | |
| 29 Encryptor(); | |
| 30 virtual ~Encryptor(); | |
| 31 | |
| 32 // Initializes the encryptor using |key| and |iv|. Returns false if either the | |
| 33 // key or the initialization vector cannot be used. | |
| 34 bool Init(SymmetricKey* key, Mode mode, const std::string& iv); | |
| 35 | |
| 36 // Encrypts |plaintext| into |ciphertext|. | |
| 37 bool Encrypt(const std::string& plaintext, std::string* ciphertext); | |
| 38 | |
| 39 // Decrypts |ciphertext| into |plaintext|. | |
| 40 bool Decrypt(const std::string& ciphertext, std::string* plaintext); | |
| 41 | |
| 42 // TODO(albertb): Support streaming encryption. | |
| 43 | |
| 44 private: | |
| 45 SymmetricKey* key_; | |
| 46 Mode mode_; | |
| 47 | |
| 48 #if defined(USE_OPENSSL) | |
| 49 bool Crypt(bool encrypt, // Pass true to encrypt, false to decrypt. | |
| 50 const std::string& input, | |
| 51 std::string* output); | |
| 52 std::string iv_; | |
| 53 #elif defined(USE_NSS) | |
| 54 ScopedPK11Slot slot_; | |
| 55 ScopedSECItem param_; | |
| 56 #elif defined(OS_MACOSX) | |
| 57 bool Crypt(int /*CCOperation*/ op, | |
| 58 const std::string& input, | |
| 59 std::string* output); | |
| 60 | |
| 61 std::string iv_; | |
| 62 #elif defined(OS_WIN) | |
| 63 ScopedHCRYPTKEY capi_key_; | |
| 64 DWORD block_size_; | |
| 65 #endif | |
| 66 }; | |
| 67 | |
| 68 } // namespace base | |
| 69 | |
| 70 #endif // BASE_CRYPTO_ENCRYPTOR_H_ | |
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