rc5.h

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// rc5.h - originally 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)
 
/// \brief RC5 block cipher information
/// \since Crypto++ 1.0
struct RC5_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 0, 255>, public VariableRounds<16>
{
    CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() {return "RC5";}
    typedef word32 RC5_WORD;
};
 
/// \brief RC5 block cipher
/// \sa <a href="http://www.cryptopp.com/wiki/RC5">RC5</a>
/// \since Crypto++ 1.0
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