1 files changed, 61 insertions, 0 deletions

diff --git a/CryptoPP/idea.h b/CryptoPP/idea.h
new file mode 100644
index 000000000..2ab5713ad
--- /dev/null
+++ 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