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// Copyright (c) 2011 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.
#ifndef CRYPTO_ENCRYPTOR_H_
#define CRYPTO_ENCRYPTOR_H_
#pragma once
#include <string>
#include "build/build_config.h"
#if defined(USE_NSS)
#include "crypto/scoped_nss_types.h"
#elif defined(OS_WIN)
#include "crypto/scoped_capi_types.h"
#endif
namespace crypto {
class SymmetricKey;
class Encryptor {
public:
enum Mode {
CBC
};
Encryptor();
virtual ~Encryptor();
// Initializes the encryptor using |key| and |iv|. Returns false if either the
// key or the initialization vector cannot be used.
bool Init(SymmetricKey* key, Mode mode, const std::string& iv);
// Encrypts |plaintext| into |ciphertext|.
bool Encrypt(const std::string& plaintext, std::string* ciphertext);
// Decrypts |ciphertext| into |plaintext|.
bool Decrypt(const std::string& ciphertext, std::string* plaintext);
// TODO(albertb): Support streaming encryption.
private:
SymmetricKey* key_;
Mode mode_;
#if defined(USE_OPENSSL)
bool Crypt(bool encrypt, // Pass true to encrypt, false to decrypt.
const std::string& input,
std::string* output);
std::string iv_;
#elif defined(USE_NSS)
ScopedPK11Slot slot_;
ScopedSECItem param_;
#elif defined(OS_MACOSX)
bool Crypt(int /*CCOperation*/ op,
const std::string& input,
std::string* output);
std::string iv_;
#elif defined(OS_WIN)
ScopedHCRYPTKEY capi_key_;
DWORD block_size_;
#endif
};
} // namespace crypto
#endif // CRYPTO_ENCRYPTOR_H_
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