/**
 * @RDE_HEADER@
 * $Id$
 * $HeadURL$
 * $Author$
 */
#pragma once

#include <QtGlobal>
#include "pwscommon_export.h"

namespace ProjectionWorkstation
{

class PWSCOMMON_EXPORT DES
{
public:
  explicit DES(quint64 key);

  quint64 des(quint64 block, bool mode);

  quint64 encrypt(quint64 block);
  quint64 decrypt(quint64 block);

  static quint64 encrypt(quint64 block, quint64 key);
  static quint64 decrypt(quint64 block, quint64 key);

protected:
  void keygen(quint64 key);

  static quint64 ip(quint64 block);
  static quint64 fp(quint64 block);

  static void feistel(quint32 &L, quint32 &R, quint32 F);
  static quint32 f(quint32 R, quint64 k);

private:
  quint64 m_subKey[16]; // 48 bits each
};

} // ProjectionWorkstation