text: // rc5.h - written and placed in the public domain by Wei Dai
  
  //! \file rc5.h
  //! \brief Classes for the RC5 block cipher
  
  #ifndef CRYPTOPP_RC5_H
  #define CRYPTOPP_RC5_H
  
  #include "seckey.h"
  #include "secblock.h"
  
  NAMESPACE_BEGIN(CryptoPP)
  
  //! \class RC5_Info
  //! \brief RC5 block cipher information
  struct RC5_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 0, 255>, public VariableRounds<16>
  {
  	CRYPTOPP_CONSTEXPR static const char *StaticAlgorithmName() {return "RC5";}
  	typedef word32 RC5_WORD;
  };
  
  //! \class RC5
  //! \brief RC5 block cipher
  //! \sa <a href="http://www.weidai.com/scan-mirror/cs.html#RC5">RC5</a>
  class RC5 : public RC5_Info, public BlockCipherDocumentation
  {
  	class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<RC5_Info>
  	{
  	public:
  		void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs &params);
  
  	protected:
  		unsigned int r;       // number of rounds
  		SecBlock<RC5_WORD> sTable;  // expanded key table
  	};
  
  	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 RC5::Encryption RC5Encryption;
  typedef RC5::Decryption RC5Decryption;
  
  NAMESPACE_END
  
  #endif
  