text: // serpent.h - written and placed in the public domain by Wei Dai
  
  //! \file serpent.h
  //! \brief Classes for the Serpent block cipher
  
  #ifndef CRYPTOPP_SERPENT_H
  #define CRYPTOPP_SERPENT_H
  
  #include "seckey.h"
  #include "secblock.h"
  
  NAMESPACE_BEGIN(CryptoPP)
  
  //! \class Serpent_Info
  //! \brief Serpent block cipher information
  struct Serpent_Info : public FixedBlockSize<16>, public VariableKeyLength<16, 0, 32>, public FixedRounds<32>
  {
  	static const char *StaticAlgorithmName() {return "Serpent";}
  };
  
  //! \class Serpent
  //! \brief Serpent block cipher
  /// \sa <a href="http://www.weidai.com/scan-mirror/cs.html#Serpent">Serpent</a>
  class Serpent : public Serpent_Info, public BlockCipherDocumentation
  {
  	class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<Serpent_Info>
  	{
  	public:
  		void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs &params);
  
  	protected:
  		FixedSizeSecBlock<word32, 33*4> m_key;
  	};
  
  	class CRYPTOPP_NO_VTABLE Enc : public Base
  	{
  	public:
  		void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
  	};
  
  	class CRYPTOPP_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 Serpent::Encryption SerpentEncryption;
  typedef Serpent::Decryption SerpentDecryption;
  
  NAMESPACE_END
  
  #endif
  