sdes.h

密码学实验 SDES

// SDes.h: interface for the CSDes class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_SDES_H__90D4D52F_05BF_11D9_84D1_0040950837D8__INCLUDED_)
#define AFX_SDES_H__90D4D52F_05BF_11D9_84D1_0040950837D8__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

typedef unsigned char  byte;
typedef unsigned short word;		

class CSDes  
{
private:
	byte *bytes;
	long length;
	word key;
	byte key1,key2;
private:
	bool GetBit  (byte  bt,byte pc);
	bool GetBit  (word  bt,byte pc);
	void SetBit  (byte &bt,byte pc,bool dc);
	void SetBit  (word &bt,byte pc,bool dc);

	void MoveL   (byte &bt,byte len,byte ti);
	void MoveR   (byte &bt,byte len,byte ti);
	void IP		 (byte &bt);
	void IP_1    (byte &bt);
	void FK      (byte &bt,byte k);
	void F       (byte &bt,byte k);
	void DesOne  (byte &bt);
	void UnDesOne(byte &bt);

	void Swap4   (byte &bt);
	void SwapAll (byte &bt,byte b7,byte b6,byte b5,byte b4,byte b3,byte b2,byte b1,byte b0);
	void SwapAll (byte &bt,const byte *pc);
	void SwapAll (word &bt,const byte *pc);
public:
	CSDes();
	CSDes(long len);
	CSDes(char *p);
	CSDes(CString p);
	CSDes(byte *p,long len);
	virtual ~CSDes();
public:
	void SetBytes(byte *bt,long len);
	void SetBytes(CString bt);
	CString GetBitString();
	CString GetString();
	word GetKey();
public:
	void SetKey(word new_key);
	void SetKey(CString new_key);
	void Des();
	void UnDes();

	byte *GetPByte() {return bytes;}
};

#endif // !defined(AFX_SDES_H__90D4D52F_05BF_11D9_84D1_0040950837D8__INCLUDED_)