blowfish_crypto.h

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#ifndef BLOWFISH_CRYPTO_CLASS
#define BLOWFISH_CRYPTO_CLASS
 
/*****************************************************************************\
*                                                                             *
*  Name   : blowfish encryption                                               *
*  Author : Chris Koeritz                                                     *
*                                                                             *
*******************************************************************************
* Copyright (c) 2005-$now By Author.  This program is free software; you can  *
* redistribute it and/or modify it under the terms of the GNU General Public  *
* License as published by the Free Software Foundation; either version 2 of   *
* the License or (at your option) any later version.  This is online at:      *
*     http://www.fsf.org/copyleft/gpl.html                                    *
* Please send any updates to: fred@gruntose.com                               *
\*****************************************************************************/
 
#include <basis/byte_array.h>
#include <basis/contracts.h>
 
namespace crypto {
 
 
class blowfish_crypto : public virtual basis::root_object
{
public:
  blowfish_crypto(int key_size);
 
  blowfish_crypto(const basis::byte_array &key, int key_size);
 
  blowfish_crypto(const blowfish_crypto &to_copy);  
 
  virtual ~blowfish_crypto();
 
  blowfish_crypto &operator = (const blowfish_crypto &to_copy);
 
  DEFINE_CLASS_NAME("blowfish_crypto");
 
  int key_size() const;  // returns the size of our key, in bits.
 
  static int minimum_key_size();
  static int maximum_key_size();
 
  const basis::byte_array &get_key() const;  
 
  bool set_key(const basis::byte_array &new_key, int key_size);
 
  static void generate_key(int size, basis::byte_array &new_key);
 
  bool encrypt(const basis::byte_array &source, basis::byte_array &target) const;
 
  bool decrypt(const basis::byte_array &source, basis::byte_array &target) const;
 
  // seldom-needed methods...
 
  static const basis::byte_array &init_vector();
 
private:
  int _key_size;  
  basis::byte_array *_key;  
};
 
} //namespace.
 
#endif