// Copyright (c) 2011 The Chromium OS 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 SHILL_CRYPTO_PROVIDER_
#define SHILL_CRYPTO_PROVIDER_

#include <base/file_path.h>
#include <base/memory/scoped_vector.h>
#include <gtest/gtest_prod.h>  // for FRIEND_TEST

namespace shill {

class CryptoInterface;
class GLib;

class CryptoProvider {
 public:
  explicit CryptoProvider(GLib *glib);

  void Init();

  // Returns |plaintext| encrypted by the highest priority available crypto
  // module capable of performing the operation. If no module succeeds, returns
  // |plaintext| as is.
  std::string Encrypt(const std::string &plaintext);

  // Returns |ciphertext| decrypted by the highest priority available crypto
  // module capable of performing the operation. If no module succeeds, returns
  // |ciphertext| as is.
  std::string Decrypt(const std::string &ciphertext);

  void set_key_matter_file(const FilePath &path) { key_matter_file_ = path; }

 private:
  FRIEND_TEST(CryptoProviderTest, Init);
  FRIEND_TEST(KeyFileStoreTest, OpenClose);
  typedef ScopedVector<CryptoInterface> Cryptos;

  static const char kKeyMatterFile[];

  GLib *glib_;

  // Registered crypto modules in high to low priority order.
  Cryptos cryptos_;

  FilePath key_matter_file_;

  DISALLOW_COPY_AND_ASSIGN(CryptoProvider);
};

}  // namespace shill

#endif  // SHILL_CRYPTO_PROVIDER_