desdlg.h

用VC做的数据加密标准DES算法可视化实现.简单易懂,有密码学和C或C++基础即可理解

// DESDlg.h : header file
//
  
#include <windows.h> 
#if !defined(AFX_DESDLG_H__1BF392AF_6A93_43EE_9C8A_452A3AC26E06__INCLUDED_)
#define AFX_DESDLG_H__1BF392AF_6A93_43EE_9C8A_452A3AC26E06__INCLUDED_

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

/////////////////////////////////////////////////////////////////////////////
// CDESDlg dialog

class CDESDlg : public CDialog
{
// Construction
public:

	BOOL IsValidate();
	CDESDlg(CWnd* pParent = NULL);	// standard constructor

void EncryptKey(char *);                      //密钥产生
unsigned char* EncryptData(unsigned char *); //	加密函数
unsigned char* DecryptData(unsigned char*); //	解密函数

private: 
void ConvertTableToMask(DWORDLONG *,int); 
void Generate_S(void);                           //S盒的产生                
DWORDLONG Char_to_Byte(unsigned char*,BOOL);     //字符转换函数
DWORDLONG Permutation(DWORDLONG,DWORDLONG*,int); //置换函数
void Generate_K(void);                           //16轮变换子密钥Ki的产生
void Encrypt_16(void);                           //16轮变换的详细过程
DWORDLONG Generate_B(DWORDLONG,DWORDLONG*);      //该函数实现S盒的作用及置换函数P
 
//成员变量
DWORDLONG Des_S[9][4][16]; //Des_S存放8个S盒
DWORDLONG mask[16]; //mask用于保存子密钥左移时移出左端的位至低位,(再跟移位后的C[i-1]或D[i-1]按位|运算补在移位后的右端,实现循环左移)
int step[16];		//step中存放16轮迭代对左移次数的规定
DWORDLONG m_subKey; 
DWORDLONG m_dwlData; 
DWORDLONG m_dwl_K[17]; 


// Dialog Data
	//{{AFX_DATA(CDESDlg)
	enum { IDD = IDD_DES_DIALOG };
	CString	m_strData;
	CString	m_strKey;
	CString	m_strOutput;
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CDESDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);	// DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	HICON m_hIcon;

	// Generated message map functions
	//{{AFX_MSG(CDESDlg)
	virtual BOOL OnInitDialog();
	afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
	afx_msg void OnPaint();
	afx_msg HCURSOR OnQueryDragIcon();
	afx_msg void OnButtonEncrypt();
	afx_msg void OnButtonDecrypt();
	virtual void OnOK();
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_DESDLG_H__1BF392AF_6A93_43EE_9C8A_452A3AC26E06__INCLUDED_)