1 files changed, 73 insertions, 0 deletions

diff --git a/CryptoPP/rc2.h b/CryptoPP/rc2.h
new file mode 100644
index 000000000..ebff798fc
--- /dev/null
+++ b/CryptoPP/rc2.h
@@ -0,0 +1,73 @@
+#ifndef CRYPTOPP_RC2_H
+#define CRYPTOPP_RC2_H
+
+/** \file
+*/
+
+#include "seckey.h"
+#include "secblock.h"
+#include "algparam.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+//! _
+struct RC2_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 1, 128>
+{
+	CRYPTOPP_CONSTANT(DEFAULT_EFFECTIVE_KEYLENGTH = 1024)
+	CRYPTOPP_CONSTANT(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 CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<RC2_Info>
+	{
+	public:
+		void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs &params);
+		unsigned int OptimalDataAlignment() const {return GetAlignmentOf<word16>();}
+
+	protected:
+		FixedSizeSecBlock<word16, 64> K;  // expanded key table
+	};
+
+	class CRYPTOPP_NO_VTABLE Enc : public Base
+	{
+	public:
+		void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
+	};
+
+	class CRYPTOPP_NO_VTABLE Dec : public Base
+	{
+	public:
+		void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
+	};
+
+public:
+	class Encryption : public BlockCipherFinal<ENCRYPTION, Enc>
+	{
+	public:
+		Encryption() {}
+		Encryption(const byte *key, size_t keyLen=DEFAULT_KEYLENGTH)
+			{SetKey(key, keyLen);}
+		Encryption(const byte *key, size_t keyLen, int effectiveKeyLen)
+			{SetKey(key, keyLen, MakeParameters("EffectiveKeyLength", effectiveKeyLen));}
+	};
+
+	class Decryption : public BlockCipherFinal<DECRYPTION, Dec>
+	{
+	public:
+		Decryption() {}
+		Decryption(const byte *key, size_t keyLen=DEFAULT_KEYLENGTH)
+			{SetKey(key, keyLen);}
+		Decryption(const byte *key, size_t keyLen, int effectiveKeyLen)
+			{SetKey(key, keyLen, MakeParameters("EffectiveKeyLength", effectiveKeyLen));}
+	};
+};
+
+typedef RC2::Encryption RC2Encryption;
+typedef RC2::Decryption RC2Decryption;
+
+NAMESPACE_END
+
+#endif