diff options
author | weidai <weidai11@users.noreply.github.com> | 2002-10-04 17:31:41 +0000 |
---|---|---|
committer | weidai <weidai11@users.noreply.github.com> | 2002-10-04 17:31:41 +0000 |
commit | a3b6ece7ab341b5b14135baeccea7d5e4c086771 (patch) | |
tree | 8b045309c238226c32a563b1df6b9c30a2f0e0b3 /idea.h | |
download | cryptopp-git-a3b6ece7ab341b5b14135baeccea7d5e4c086771.tar.gz |
Initial revision
Diffstat (limited to 'idea.h')
-rw-r--r-- | idea.h | 52 |
1 files changed, 52 insertions, 0 deletions
@@ -0,0 +1,52 @@ +#ifndef CRYPTOPP_IDEA_H +#define CRYPTOPP_IDEA_H + +/** \file +*/ + +#include "seckey.h" +#include "secblock.h" + +NAMESPACE_BEGIN(CryptoPP) + +struct IDEA_Info : public FixedBlockSize<8>, public FixedKeyLength<16>, public FixedRounds<8> +{ + static const char *StaticAlgorithmName() {return "IDEA";} +}; + +/// <a href="http://www.weidai.com/scan-mirror/cs.html#IDEA">IDEA</a> +class IDEA : public IDEA_Info, public BlockCipherDocumentation +{ + class Base : public BlockCipherBaseTemplate<IDEA_Info> + { + public: + unsigned int GetAlignment() const {return 2;} + void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const; + + void UncheckedSetKey(CipherDir direction, const byte *userKey, unsigned int length); + + private: + void EnKey(const byte *); + void DeKey(); + FixedSizeSecBlock<word, 6*ROUNDS+4> m_key; + + #ifdef IDEA_LARGECACHE + static inline void LookupMUL(word &a, word b); + void LookupKeyLogs(); + static void BuildLogTables(); + static bool tablesBuilt; + static word16 log[0x10000], antilog[0x10000]; + #endif + }; + +public: + typedef BlockCipherTemplate<ENCRYPTION, Base> Encryption; + typedef BlockCipherTemplate<DECRYPTION, Base> Decryption; +}; + +typedef IDEA::Encryption IDEAEncryption; +typedef IDEA::Decryption IDEADecryption; + +NAMESPACE_END + +#endif |