Initial revision

1 files changed, 133 insertions, 0 deletions

diff --git a/des.h b/des.h
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+++ b/des.h
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+#ifndef CRYPTOPP_DES_H
+#define CRYPTOPP_DES_H
+
+/** \file
+*/
+
+#include "seckey.h"
+#include "secblock.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+struct DES_Info : public FixedBlockSize<8>, public FixedKeyLength<8>
+{
+	static const char *StaticAlgorithmName() {return "DES";}
+};
+
+/// <a href="http://www.weidai.com/scan-mirror/cs.html#DES">DES</a>
+/*! The DES implementation in Crypto++ ignores the parity bits
+	(the least significant bits of each byte) in the key. However
+	you can use CheckKeyParityBits() and CorrectKeyParityBits() to
+	check or correct the parity bits if you wish. */
+class DES : public DES_Info, public BlockCipherDocumentation
+{
+	class Base : public BlockCipherBaseTemplate<DES_Info>
+	{
+	public:
+		void UncheckedSetKey(CipherDir direction, const byte *userKey, unsigned int length = 8);
+		void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
+
+		// exposed for faster Triple-DES
+		void RawProcessBlock(word32 &l, word32 &r) const;
+
+	protected:
+		static const word32 Spbox[8][64];
+
+		FixedSizeSecBlock<word32, 32> k;
+	};
+
+public:
+	//! check DES key parity bits
+	static bool CheckKeyParityBits(const byte *key);
+	//! correct DES key parity bits
+	static void CorrectKeyParityBits(byte *key);
+
+	typedef BlockCipherTemplate<ENCRYPTION, Base> Encryption;
+	typedef BlockCipherTemplate<DECRYPTION, Base> Decryption;
+};
+
+struct DES_EDE2_Info : public FixedBlockSize<8>, public FixedKeyLength<16>
+{
+	static const char *StaticAlgorithmName() {return "DES-EDE2";}
+};
+
+/// <a href="http://www.weidai.com/scan-mirror/cs.html#DESede">DES-EDE2</a>
+class DES_EDE2 : public DES_EDE2_Info, public BlockCipherDocumentation
+{
+	class Base : public BlockCipherBaseTemplate<DES_EDE2_Info>
+	{
+	public:
+		void UncheckedSetKey(CipherDir direction, const byte *userKey, unsigned int length);
+		void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
+
+	protected:
+		DES::Encryption m_des1, m_des2;
+	};
+
+public:
+	typedef BlockCipherTemplate<ENCRYPTION, Base> Encryption;
+	typedef BlockCipherTemplate<DECRYPTION, Base> Decryption;
+};
+
+struct DES_EDE3_Info : public FixedBlockSize<8>, public FixedKeyLength<24>
+{
+	static const char *StaticAlgorithmName() {return "DES-EDE3";}
+};
+
+/// <a href="http://www.weidai.com/scan-mirror/cs.html#DESede">DES-EDE3</a>
+class DES_EDE3 : public DES_EDE3_Info, public BlockCipherDocumentation
+{
+	class Base : public BlockCipherBaseTemplate<DES_EDE3_Info>
+	{
+	public:
+		void UncheckedSetKey(CipherDir dir, const byte *key, unsigned int length);
+		void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
+
+	protected:
+		DES::Encryption m_des1, m_des2, m_des3;
+	};
+
+public:
+	typedef BlockCipherTemplate<ENCRYPTION, Base> Encryption;
+	typedef BlockCipherTemplate<DECRYPTION, Base> Decryption;
+};
+
+struct DES_XEX3_Info : public FixedBlockSize<8>, public FixedKeyLength<24>
+{
+	static const char *StaticAlgorithmName() {return "DES-XEX3";}
+};
+
+/// <a href="http://www.weidai.com/scan-mirror/cs.html#DESX">DES-XEX3</a>, AKA DESX
+class DES_XEX3 : public DES_XEX3_Info, public BlockCipherDocumentation
+{
+	class Base : public BlockCipherBaseTemplate<DES_XEX3_Info>
+	{
+	public:
+		void UncheckedSetKey(CipherDir dir, const byte *key, unsigned int length);
+		void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
+
+	protected:
+		FixedSizeSecBlock<byte, BLOCKSIZE> m_x1, m_x3;
+		DES::Encryption m_des;
+	};
+
+public:
+	typedef BlockCipherTemplate<ENCRYPTION, Base> Encryption;
+	typedef BlockCipherTemplate<DECRYPTION, Base> Decryption;
+};
+
+typedef DES::Encryption DESEncryption;
+typedef DES::Decryption DESDecryption;
+
+typedef DES_EDE2::Encryption DES_EDE2_Encryption;
+typedef DES_EDE2::Decryption DES_EDE2_Decryption;
+
+typedef DES_EDE3::Encryption DES_EDE3_Encryption;
+typedef DES_EDE3::Decryption DES_EDE3_Decryption;
+
+typedef DES_XEX3::Encryption DES_XEX3_Encryption;
+typedef DES_XEX3::Decryption DES_XEX3_Decryption;
+
+NAMESPACE_END
+
+#endif