skipjack.h

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// skipjack.h - written and placed in the public domain by Wei Dai


#ifndef CRYPTOPP_SKIPJACK_H
#define CRYPTOPP_SKIPJACK_H

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

NAMESPACE_BEGIN(CryptoPP)

struct SKIPJACK_Info : public FixedBlockSize<8>, public FixedKeyLength<10>
{
        CRYPTOPP_DLL static const char * CRYPTOPP_API StaticAlgorithmName() {return "SKIPJACK";}
};

class SKIPJACK : public SKIPJACK_Info, public BlockCipherDocumentation
{
        class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<SKIPJACK_Info>
        {
        public:
                void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs &params);
                unsigned int OptimalDataAlignment() const {return GetAlignmentOf<word16>();}

        protected:
                static const byte fTable[256];

                FixedSizeSecBlock<byte, 10*256> tab;
        };

        class CRYPTOPP_DLL 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_DLL 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 SKIPJACK::Encryption SKIPJACKEncryption;
typedef SKIPJACK::Decryption SKIPJACKDecryption;

NAMESPACE_END

#endif