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63 lines
1.5 KiB
63 lines
1.5 KiB
// idea.h - written and placed in the public domain by Wei Dai |
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//! \file idea.h |
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//! \brief Classes for the IDEA block cipher |
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#ifndef CRYPTOPP_IDEA_H |
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#define CRYPTOPP_IDEA_H |
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#include "seckey.h" |
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#include "secblock.h" |
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NAMESPACE_BEGIN(CryptoPP) |
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//! _ |
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struct IDEA_Info : public FixedBlockSize<8>, public FixedKeyLength<16>, public FixedRounds<8> |
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{ |
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static const char *StaticAlgorithmName() {return "IDEA";} |
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}; |
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/// <a href="http://www.weidai.com/scan-mirror/cs.html#IDEA">IDEA</a> |
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class IDEA : public IDEA_Info, public BlockCipherDocumentation |
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{ |
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public: // made public for internal purposes |
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#ifdef CRYPTOPP_NATIVE_DWORD_AVAILABLE |
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typedef word Word; |
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#else |
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typedef hword Word; |
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#endif |
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private: |
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class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<IDEA_Info> |
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{ |
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public: |
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unsigned int OptimalDataAlignment() const {return 2;} |
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void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const; |
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void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs ¶ms); |
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private: |
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void EnKey(const byte *); |
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void DeKey(); |
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FixedSizeSecBlock<Word, 6*ROUNDS+4> m_key; |
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#ifdef IDEA_LARGECACHE |
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static inline void LookupMUL(word &a, word b); |
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void LookupKeyLogs(); |
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static void BuildLogTables(); |
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static volatile bool tablesBuilt; |
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static word16 log[0x10000], antilog[0x10000]; |
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#endif |
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}; |
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public: |
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typedef BlockCipherFinal<ENCRYPTION, Base> Encryption; |
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typedef BlockCipherFinal<DECRYPTION, Base> Decryption; |
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}; |
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typedef IDEA::Encryption IDEAEncryption; |
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typedef IDEA::Decryption IDEADecryption; |
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NAMESPACE_END |
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#endif
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