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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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