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-rw-r--r--CryptoPP/idea.h61
1 files changed, 61 insertions, 0 deletions
diff --git a/CryptoPP/idea.h b/CryptoPP/idea.h
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+++ b/CryptoPP/idea.h
@@ -0,0 +1,61 @@
+#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
+{
+public: // made public for internal purposes
+#ifdef CRYPTOPP_NATIVE_DWORD_AVAILABLE
+ typedef word Word;
+#else
+ typedef hword Word;
+#endif
+
+private:
+ class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<IDEA_Info>
+ {
+ public:
+ unsigned int OptimalDataAlignment() const {return 2;}
+ void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
+
+ void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs &params);
+
+ 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 volatile bool tablesBuilt;
+ static word16 log[0x10000], antilog[0x10000];
+ #endif
+ };
+
+public:
+ typedef BlockCipherFinal<ENCRYPTION, Base> Encryption;
+ typedef BlockCipherFinal<DECRYPTION, Base> Decryption;
+};
+
+typedef IDEA::Encryption IDEAEncryption;
+typedef IDEA::Decryption IDEADecryption;
+
+NAMESPACE_END
+
+#endif