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3way.h

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00001 #ifndef CRYPTOPP_THREEWAY_H
00002 #define CRYPTOPP_THREEWAY_H
00003 
00004 /** \file
00005 */
00006 
00007 #include "seckey.h"
00008 #include "secblock.h"
00009 
00010 NAMESPACE_BEGIN(CryptoPP)
00011 
00012 struct ThreeWay_Info : public FixedBlockSize<12>, public FixedKeyLength<12>, public VariableRounds<11>
00013 {
00014         static const char *StaticAlgorithmName() {return "3-Way";}
00015 };
00016 
00017 /// <a href="http://www.weidai.com/scan-mirror/cs.html#3-Way">3-Way</a>
00018 class ThreeWay : public ThreeWay_Info, public BlockCipherDocumentation
00019 {
00020         class Base : public BlockCipherBaseTemplate<ThreeWay_Info>
00021         {
00022         public:
00023                 void UncheckedSetKey(CipherDir direction, const byte *key, unsigned int length, unsigned int rounds);
00024 
00025         protected:
00026                 unsigned int m_rounds;
00027                 FixedSizeSecBlock<word32, 3> m_k;
00028         };
00029 
00030         class Enc : public Base
00031         {
00032         public:
00033                 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
00034         };
00035 
00036         class Dec : public Base
00037         {
00038         public:
00039                 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
00040         };
00041 
00042 public:
00043         typedef BlockCipherTemplate<ENCRYPTION, Enc> Encryption;
00044         typedef BlockCipherTemplate<DECRYPTION, Dec> Decryption;
00045 };
00046 
00047 typedef ThreeWay::Encryption ThreeWayEncryption;
00048 typedef ThreeWay::Decryption ThreeWayDecryption;
00049 
00050 NAMESPACE_END
00051 
00052 #endif

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