Initial revision

1 files changed, 74 insertions, 0 deletions

diff --git a/rc2.h b/rc2.h
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+++ b/rc2.h
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+#ifndef CRYPTOPP_RC2_H
+#define CRYPTOPP_RC2_H
+
+/** \file
+*/
+
+#include "seckey.h"
+#include "secblock.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+struct RC2_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 1, 128>
+{
+	enum {DEFAULT_EFFECTIVE_KEYLENGTH = 1024, MAX_EFFECTIVE_KEYLENGTH = 1024};
+	static const char *StaticAlgorithmName() {return "RC2";}
+};
+
+/// <a href="http://www.weidai.com/scan-mirror/cs.html#RC2">RC2</a>
+class RC2 : public RC2_Info, public BlockCipherDocumentation
+{
+	class Base : public BlockCipherBaseTemplate<RC2_Info>
+	{
+	public:
+		void UncheckedSetKey(CipherDir direction, const byte *key, unsigned int length, unsigned int effectiveKeyLength);
+		void SetKeyWithEffectiveKeyLength(const byte *key, unsigned int length, unsigned int effectiveKeyLength);
+
+	protected:
+		template <class T>
+		static inline void CheckedSetKey(T *obj, CipherDir dir, const byte *key, unsigned int length, const NameValuePairs &param)
+		{
+			obj->ThrowIfInvalidKeyLength(length);
+			int effectiveKeyLength = param.GetIntValueWithDefault("EffectiveKeyLength", DEFAULT_EFFECTIVE_KEYLENGTH);
+			obj->SetKeyWithEffectiveKeyLength(key, length, effectiveKeyLength);
+		}
+
+		FixedSizeSecBlock<word16, 64> K;  // expanded key table
+	};
+
+	class Enc : public Base
+	{
+	public:
+		void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
+	};
+
+	class Dec : public Base
+	{
+	public:
+		void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
+	};
+
+public:
+	class Encryption : public BlockCipherTemplate<ENCRYPTION, Enc>
+	{
+	public:
+		Encryption() {}
+		Encryption(const byte *key, unsigned int keyLen=DEFAULT_KEYLENGTH, unsigned int effectiveLen=1024)
+			{SetKeyWithEffectiveKeyLength(key, keyLen, effectiveLen);}
+	};
+
+	class Decryption : public BlockCipherTemplate<DECRYPTION, Dec>
+	{
+	public:
+		Decryption() {}
+		Decryption(const byte *key, unsigned int keyLen=DEFAULT_KEYLENGTH, unsigned int effectiveLen=1024)
+			{SetKeyWithEffectiveKeyLength(key, keyLen, effectiveLen);}
+	};
+};
+
+typedef RC2::Encryption RC2Encryption;
+typedef RC2::Decryption RC2Decryption;
+
+NAMESPACE_END
+
+#endif