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#ifndef MOZC_STORAGE_ENCRYPTED_STRING_STORAGE_H_
#define MOZC_STORAGE_ENCRYPTED_STRING_STORAGE_H_

#include <string>

#include "base/port.h"

namespace mozc {
namespace storage {

class StringStorageInterface {
 public:
  virtual ~StringStorageInterface() {}

  virtual bool Load(string *output) const = 0;
  virtual bool Save(const string &input) const = 0;
};

class EncryptedStringStorage : public StringStorageInterface {
 public:
  explicit EncryptedStringStorage(const string &filename);
  virtual ~EncryptedStringStorage();

  virtual bool Load(string *output) const;
  virtual bool Save(const string &input) const;

 protected:
  virtual bool Encrypt(const string &salt, string *data) const;
  virtual bool Decrypt(const string &salt, string *data) const;

 private:
  string filename_;

  DISALLOW_COPY_AND_ASSIGN(EncryptedStringStorage);
};

}  // namespace storage
}  // namespace mozc

#endif  // MOZC_STORAGE_ENCRYPTED_STRING_STORAGE_H_