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square.h

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#ifndef CRYPTOPP_SQUARE_H
#define CRYPTOPP_SQUARE_H

#include "config.h"

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

NAMESPACE_BEGIN(CryptoPP)

class SquareBase : public FixedBlockSize<16>, public FixedKeyLength<16>
{
public:
        enum {ROUNDS=8};

protected:
        SquareBase(const byte *userKey, CipherDir dir);

        SecBlock<word32[4]> roundkeys;
};

class SquareEncryption : public SquareBase
{
public:
        SquareEncryption(const byte *key, unsigned int = 0) : SquareBase(key, ENCRYPTION) {}

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

private:
        static const byte Se[256];
        static const word32 Te[4][256];
};

class SquareDecryption : public SquareBase
{
public:
        SquareDecryption(const byte *key, unsigned int = 0) : SquareBase(key, DECRYPTION) {}

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

private:
        static const byte Sd[256];
        static const word32 Td[4][256];
};

NAMESPACE_END

#endif

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