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twofish.h

Go to the documentation of this file.

#ifndef CRYPTOPP_TWOFISH_H
#define CRYPTOPP_TWOFISH_H

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

NAMESPACE_BEGIN(CryptoPP)

class Twofish : public FixedBlockSize<16>, public VariableKeyLength<16, 0, 32>
{
protected:
        Twofish(const byte *userKey, unsigned int keylength);
        static word32 h0(word32 x, const word32 *key, unsigned int kLen);
        static word32 h(word32 x, const word32 *key, unsigned int kLen);

        static const byte q[2][256];
        static const word32 mds[4][256];

        SecBlock<word32> m_k;
        SecBlock<word32[256]> m_s;
};

class TwofishEncryption : public Twofish
{
public:
        TwofishEncryption(const byte *userKey, unsigned int keylength=DEFAULT_KEYLENGTH)
                : Twofish(userKey, keylength) {}

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

class TwofishDecryption : public Twofish
{
public:
        TwofishDecryption(const byte *userKey, unsigned int keylength=DEFAULT_KEYLENGTH)
                : Twofish(userKey, keylength) {}

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

NAMESPACE_END

#endif

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