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