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// Copyright (c) 2010 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 BASE_CRYPTO_ENCRYPTOR_H_
#define BASE_CRYPTO_ENCRYPTOR_H_

#include <string>

#include "base/crypto/symmetric_key.h"
#include "base/scoped_ptr.h"

namespace base {

class Encryptor {
 public:
  enum Mode {
    CBC
  };
  explicit Encryptor();
  ~Encryptor();

  // Initializes the encryptor using |key| and |iv|. Takes ownership of |key| if
  // successful. 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:
  Mode mode_;
  scoped_ptr<SymmetricKey> key_;

#if defined(USE_NSS)
  ScopedPK11Slot slot_;
  ScopedSECItem param_;
#endif
};

}  // namespace base

#endif  // BASE_CRYPTO_ENCRYPTOR_H_