00001 #ifndef CRYPTOPP_IDEA_H
00002 #define CRYPTOPP_IDEA_H
00003
00004
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
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