dataencodedlg.cpp

一个用移位思想实现的简单数据加密程序

// DataEncodeDlg.cpp : implementation file
//

#include "stdafx.h"
#include "DataEncode.h"
#include "DataEncodeDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About
int asc;

int CHARtoINT1(char c)
{
	switch(c)
	{
	case 'A':return 1;
	case 'B':return 2;
	case 'C':return 3;
	case 'D':return 4;
	case 'E':return 5;
	case 'F':return 6;
	case 'G':return 7;
	case 'H':return 8;
	case 'I':return 9;
	case 'J':return 10;
	case 'K':return 11;
	case 'L':return 12;
	case 'M':return 13;
	case 'N':return 14;
	case 'O':return 15;
	case 'P':return 16;
	case 'Q':return 17;
	case 'R':return 18;
	case 'S':return 19;
	case 'T':return 20;
	case 'U':return 21;
	case 'V':return 22;
	case 'W':return 23;
	case 'X':return 24;
	case 'Y':return 25;
	case 'Z':return 26;
	}
}
int CHARtoINT2(char c)
{
	switch(c)
	{
	case 'a':return 1;
	case 'b':return 2;
	case 'c':return 3;
	case 'd':return 4;
	case 'e':return 5;
	case 'f':return 6;
	case 'g':return 7;
	case 'h':return 8;
	case 'i':return 9;
	case 'j':return 10;
	case 'k':return 11;
	case 'l':return 12;
	case 'm':return 13;
	case 'n':return 14;
	case 'o':return 15;
	case 'p':return 16;
	case 'q':return 17;
	case 'r':return 18;
	case 's':return 19;
	case 't':return 20;
	case 'u':return 21;
	case 'v':return 22;
	case 'w':return 23;
	case 'x':return 24;
	case 'y':return 25;
	case 'z':return 26;
	}
}            //判断大小写，将字母与数字一一对应

char INTtoCHAR(int I)
{
	switch(I)
	{
	case 1:if((asc>=65)&&(asc<=90)) return 'A';else return 'a';
	case 2:if((asc>=65)&&(asc<=90)) return 'B';else return 'b';
	case 3:if((asc>=65)&&(asc<=90)) return 'C';else return 'c';
	case 4:if((asc>=65)&&(asc<=90)) return 'D';else return 'd';
	case 5:if((asc>=65)&&(asc<=90)) return 'E';else return 'e';
	case 6:if((asc>=65)&&(asc<=90)) return 'F';else return 'f';
	case 7:if((asc>=65)&&(asc<=90)) return 'G';else return 'g';
	case 8:if((asc>=65)&&(asc<=90)) return 'H';else return 'h';
	case 9:if((asc>=65)&&(asc<=90)) return 'I';else return 'i';
	case 10:if((asc>=65)&&(asc<=90)) return 'J';else return 'j';
	case 11:if((asc>=65)&&(asc<=90)) return 'K';else return 'k';
	case 12:if((asc>=65)&&(asc<=90)) return 'L';else return 'l';
	case 13:if((asc>=65)&&(asc<=90)) return 'M';else return 'm';
	case 14:if((asc>=65)&&(asc<=90)) return 'N';else return 'n';
	case 15:if((asc>=65)&&(asc<=90)) return 'O';else return 'o';
	case 16:if((asc>=65)&&(asc<=90)) return 'P';else return 'p';
	case 17:if((asc>=65)&&(asc<=90)) return 'Q';else return 'q';
	case 18:if((asc>=65)&&(asc<=90)) return 'R';else return 'r';
	case 19:if((asc>=65)&&(asc<=90)) return 'S';else return 's';
	case 20:if((asc>=65)&&(asc<=90)) return 'T';else return 't';
	case 21:if((asc>=65)&&(asc<=90)) return 'U';else return 'u';
	case 22:if((asc>=65)&&(asc<=90)) return 'V';else return 'v';
	case 23:if((asc>=65)&&(asc<=90)) return 'W';else return 'w';
	case 24:if((asc>=65)&&(asc<=90)) return 'X';else return 'x';
	case 25:if((asc>=65)&&(asc<=90)) return 'Y';else return 'y';
	case 0 :if((asc>=65)&&(asc<=90)) return 'Z';else return 'z';
	}
}
              //判断输入字母的ASCII值，将数字与字母一一对应

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

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

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CDataEncodeDlg dialog

CDataEncodeDlg::CDataEncodeDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CDataEncodeDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CDataEncodeDlg)
	m_mingwen = _T("");
	m_miwen = _T("");
	m_k = 0;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CDataEncodeDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CDataEncodeDlg)
	DDX_Text(pDX, IDC_EDIT1, m_mingwen);
	DDX_Text(pDX, IDC_EDIT2, m_miwen);
	DDX_Text(pDX, IDC_EDIT3, m_k);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CDataEncodeDlg, CDialog)
	//{{AFX_MSG_MAP(CDataEncodeDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_EN_CHANGE(IDC_EDIT1, OnChangeEdit1)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CDataEncodeDlg message handlers

BOOL CDataEncodeDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CDataEncodeDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CDataEncodeDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CDataEncodeDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CDataEncodeDlg::OnChangeEdit1() 
{
	// TODO: If this is a RICHEDIT control, the control will not
	// send this notification unless you override the CDialog::OnInitDialog()
	// function and call CRichEditCtrl().SetEventMask()
	// with the ENM_CHANGE flag ORed into the mask.
	
	// TODO: Add your control notification handler code here
	
}

void CDataEncodeDlg::OnOK() 
{
	// TODO: Add extra validation here
	int Length,i,j,m;
	long int k;
	CString input;
	UpdateData(TRUE);
	m_miwen=_T("");
	k=m_k;
    if(k>=2147483628)
	{
		MessageBox("k值超出可计算范围        ","提示",MB_OK | MB_ICONINFORMATION);
	    MessageBox("k值可计算范围是0－2147483627        ","提示",MB_OK | MB_ICONINFORMATION);
	}            
	input=m_mingwen;
	if ( input.IsEmpty() ) MessageBox("请输入明文        ","提示",MB_OK | MB_ICONINFORMATION); 
	// 错误处理
    else
	{
        Length = input.GetLength();
		for ( m=0;m<Length;m++ )
		{
			asc=input[m];
			if((asc>=65)&&(asc<=90))
			{
				i = CHARtoINT1(input[m]);
			}
			else if((asc>=97)&&(asc<=122))
			{
				i = CHARtoINT2(input[m]);
			}
			else
			{
				MessageBox("您输入的明文中有数字、标点符号或者其他字符，请输入英文字母。     ","提示",MB_OK | MB_ICONINFORMATION);
				m_miwen="Please input English Characters!";
				break;
			}
			
			j=(i+k)%26;
		    m_miwen+=_T(INTtoCHAR(j));
			
		}   //密文的输出
	}
	UpdateData(FALSE);
}
	//CDialog::OnOK();