text: // 3way.h - originally written and placed in the public domain by Wei Dai
  
  /// \file 3way.h
  /// \brief Classes for the 3-Way block cipher
  
  #ifndef CryptoPP_NV_2_THREEWAY_H
  #define CryptoPP_NV_2_THREEWAY_H
  
  #include "config.h"
  #include "seckey.h"
  #include "secblock.h"
  
  NAMESPACE_BEGIN(CryptoPP_NV_2)
  
  /// \brief ThreeWay block cipher information
  struct ThreeWay_Info : public FixedBlockSize<12>, public FixedKeyLength<12>, public VariableRounds<11>
  {
  	CryptoPP_NV_2_STATIC_CONSTEXPR const char* StaticAlgorithmName() {return "3-Way";}
  };
  
  /// \brief ThreeWay block cipher
  /// \sa <a href="http://www.CryptoPP_NV_2.com/wiki/3-Way">3-Way</a>
  class ThreeWay : public ThreeWay_Info, public BlockCipherDocumentation
  {
  	/// \brief Class specific implementation and overrides used to operate the cipher.
  	/// \details Implementations and overrides in \p Base apply to both \p ENCRYPTION and \p DECRYPTION directions
  	class CryptoPP_NV_2_NO_VTABLE Base : public BlockCipherImpl<ThreeWay_Info>
  	{
  	public:
  		void UncheckedSetKey(const byte *key, unsigned int length, const NameValuePairs &params);
  
  	protected:
  		unsigned int m_rounds;
  		FixedSizeSecBlock<word32, 3> m_k;
  	};
  
  	/// \brief Class specific methods used to operate the cipher in the forward direction.
  	/// \details Implementations and overrides in \p Enc apply to \p ENCRYPTION.
  	class CryptoPP_NV_2_NO_VTABLE Enc : public Base
  	{
  	public:
  		void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
  	};
  
  	/// \brief Class specific methods used to operate the cipher in the reverse direction.
  	/// \details Implementations and overrides in \p Dec apply to \p DECRYPTION.
  	class CryptoPP_NV_2_NO_VTABLE Dec : public Base
  	{
  	public:
  		void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
  	};
  
  public:
  	typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
  	typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
  };
  
  typedef ThreeWay::Encryption ThreeWayEncryption;
  typedef ThreeWay::Decryption ThreeWayDecryption;
  
  NAMESPACE_END
  
  #endif
  