square.h

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#ifndef CRYPTOPP_SQUARE_H
#define CRYPTOPP_SQUARE_H

/** \file
*/

#include "seckey.h"
#include "secblock.h"

NAMESPACE_BEGIN(CryptoPP)

//! _
struct Square_Info : public FixedBlockSize<16>, public FixedKeyLength<16>, FixedRounds<8>
{
        static const char *StaticAlgorithmName() {return "Square";}
};

/// <a href="http://www.weidai.com/scan-mirror/cs.html#Square">Square</a>
class Square : public Square_Info, public BlockCipherDocumentation
{
        class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<Square_Info>
        {
        public:
                void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs &params);

        protected:
                FixedSizeSecBlock<word32[4], ROUNDS+1> roundkeys;
        };

        class CRYPTOPP_NO_VTABLE Enc : public Base
        {
        public:
                void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
        private:
                static const byte Se[256];
                static const word32 Te[4][256];
        };

        class CRYPTOPP_NO_VTABLE Dec : public Base
        {
        public:
                void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
        private:
                static const byte Sd[256];
                static const word32 Td[4][256];
        };

public:
        typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
        typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
};

typedef Square::Encryption SquareEncryption;
typedef Square::Decryption SquareDecryption;

NAMESPACE_END

#endif

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