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idea.h

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00001 #ifndef CRYPTOPP_IDEA_H 00002 #define CRYPTOPP_IDEA_H 00003 00004 /** \file 00005 */ 00006 00007 #include "seckey.h" 00008 #include "secblock.h" 00009 00010 NAMESPACE_BEGIN(CryptoPP) 00011 00012 struct IDEA_Info : public FixedBlockSize<8>, public FixedKeyLength<16>, public FixedRounds<8> 00013 { 00014 static const char *StaticAlgorithmName() {return "IDEA";} 00015 }; 00016 00017 /// <a href="http://www.weidai.com/scan-mirror/cs.html#IDEA">IDEA</a> 00018 class IDEA : public IDEA_Info, public BlockCipherDocumentation 00019 { 00020 class Base : public BlockCipherBaseTemplate<IDEA_Info> 00021 { 00022 public: 00023 unsigned int GetAlignment() const {return 2;} 00024 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const; 00025 00026 void UncheckedSetKey(CipherDir direction, const byte *userKey, unsigned int length); 00027 00028 private: 00029 void EnKey(const byte *); 00030 void DeKey(); 00031 FixedSizeSecBlock<word, 6*ROUNDS+4> m_key; 00032 00033 #ifdef IDEA_LARGECACHE 00034 static inline void LookupMUL(word &a, word b); 00035 void LookupKeyLogs(); 00036 static void BuildLogTables(); 00037 static bool tablesBuilt; 00038 static word16 log[0x10000], antilog[0x10000]; 00039 #endif 00040 }; 00041 00042 public: 00043 typedef BlockCipherTemplate<ENCRYPTION, Base> Encryption; 00044 typedef BlockCipherTemplate<DECRYPTION, Base> Decryption; 00045 }; 00046 00047 typedef IDEA::Encryption IDEAEncryption; 00048 typedef IDEA::Decryption IDEADecryption; 00049 00050 NAMESPACE_END 00051 00052 #endif

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