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skipjack.h

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00001 #ifndef CRYPTOPP_SKIPJACK_H
00002 #define CRYPTOPP_SKIPJACK_H
00003 
00004 /** \file
00005 */
00006 
00007 #include "seckey.h"
00008 #include "secblock.h"
00009 
00010 NAMESPACE_BEGIN(CryptoPP)
00011 
00012 struct SKIPJACK_Info : public FixedBlockSize<8>, public FixedKeyLength<10>
00013 {
00014         static const char *StaticAlgorithmName() {return "SKIPJACK";}
00015 };
00016 
00017 /// <a href="http://www.weidai.com/scan-mirror/cs.html#SKIPJACK">SKIPJACK</a>
00018 class SKIPJACK : public SKIPJACK_Info, public BlockCipherDocumentation
00019 {
00020         class Base : public BlockCipherBaseTemplate<SKIPJACK_Info>
00021         {
00022         public:
00023                 void UncheckedSetKey(CipherDir direction, const byte *userKey, unsigned int length);
00024 
00025         protected:
00026                 static const byte fTable[256];
00027 
00028                 FixedSizeSecBlock<byte[256], 10> tab;
00029         };
00030 
00031         class Enc : public Base
00032         {
00033         public:
00034                 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
00035         private:
00036                 static const byte Se[256];
00037                 static const word32 Te[4][256];
00038         };
00039 
00040         class Dec : public Base
00041         {
00042         public:
00043                 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
00044         private:
00045                 static const byte Sd[256];
00046                 static const word32 Td[4][256];
00047         };
00048 
00049 public:
00050         typedef BlockCipherTemplate<ENCRYPTION, Enc> Encryption;
00051         typedef BlockCipherTemplate<DECRYPTION, Dec> Decryption;
00052 };
00053 
00054 typedef SKIPJACK::Encryption SKIPJACKEncryption;
00055 typedef SKIPJACK::Decryption SKIPJACKDecryption;
00056 
00057 NAMESPACE_END
00058 
00059 #endif

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