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rc5.h

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#ifndef CRYPTOPP_RC5_H
#define CRYPTOPP_RC5_H

#include "cryptlib.h"
#include "misc.h"

NAMESPACE_BEGIN(CryptoPP)

class RC5Base : public FixedBlockSize<8>, public VariableKeyLength<16, 0, 255>
{
public:
        typedef word32 RC5_WORD;

        enum {DEFAULT_ROUNDS=16};

protected:
        RC5Base(const byte *key, unsigned int keyLen, unsigned int rounds);

        const unsigned int r;       // number of rounds
        SecBlock<RC5_WORD> sTable;  // expanded key table
};

class RC5Encryption : public RC5Base
{
public:
        RC5Encryption(const byte *key, unsigned int keyLen=DEFAULT_KEYLENGTH, unsigned int rounds=DEFAULT_ROUNDS)
                : RC5Base(key, keyLen, rounds) {}

        void ProcessBlock(byte * inoutBlock) const
                {RC5Encryption::ProcessBlock(inoutBlock, inoutBlock);}
        void ProcessBlock(const byte *inBlock, byte * outBlock) const;
};

class RC5Decryption : public RC5Base
{
public:
        RC5Decryption(const byte *key, unsigned int keyLen=DEFAULT_KEYLENGTH, unsigned int rounds=DEFAULT_ROUNDS)
                : RC5Base(key, keyLen, rounds) {}

        void ProcessBlock(byte * inoutBlock) const
                {RC5Decryption::ProcessBlock(inoutBlock, inoutBlock);}
        void ProcessBlock(const byte *inBlock, byte * outBlock) const;
};

NAMESPACE_END

#endif

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