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square.h

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00001 #ifndef CRYPTOPP_SQUARE_H
00002 #define CRYPTOPP_SQUARE_H
00003 
00004 /** \file
00005 */
00006 
00007 #include "seckey.h"
00008 #include "secblock.h"
00009 
00010 NAMESPACE_BEGIN(CryptoPP)
00011 
00012 struct Square_Info : public FixedBlockSize<16>, public FixedKeyLength<16>, FixedRounds<8>
00013 {
00014         static const char *StaticAlgorithmName() {return "Square";}
00015 };
00016 
00017 /// <a href="http://www.weidai.com/scan-mirror/cs.html#Square">Square</a>
00018 class Square : public Square_Info, public BlockCipherDocumentation
00019 {
00020         class Base : public BlockCipherBaseTemplate<Square_Info>
00021         {
00022         public:
00023                 void UncheckedSetKey(CipherDir direction, const byte *userKey, unsigned int length);
00024 
00025         protected:
00026                 FixedSizeSecBlock<word32[4], ROUNDS+1> roundkeys;
00027         };
00028 
00029         class Enc : public Base
00030         {
00031         public:
00032                 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
00033         private:
00034                 static const byte Se[256];
00035                 static const word32 Te[4][256];
00036         };
00037 
00038         class Dec : public Base
00039         {
00040         public:
00041                 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
00042         private:
00043                 static const byte Sd[256];
00044                 static const word32 Td[4][256];
00045         };
00046 
00047 public:
00048         typedef BlockCipherTemplate<ENCRYPTION, Enc> Encryption;
00049         typedef BlockCipherTemplate<DECRYPTION, Dec> Decryption;
00050 };
00051 
00052 typedef Square::Encryption SquareEncryption;
00053 typedef Square::Decryption SquareDecryption;
00054 
00055 NAMESPACE_END
00056 
00057 #endif

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