playfairdlg.cpp

自己编写的playfair加密/解密完整源程序.是用VC6 MFC编写的.Windows运行界面.可在Microsoft Visual C++ 6.0集成开发环境下直接编译运行.

// playfairDlg.cpp : implementation file
//

#include "stdafx.h"
#include "playfair.h"
#include "playfairDlg.h"

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

//声明playfair加密/解密用到的函数和变量
extern void plainExpand(CString plain,CString & pExpand);
extern CString keyMtx[5][5];
extern void keyMtxGen(CString key);
extern void playfairEnc(CString pExpand,CString & cipher);
extern void playfairDec(CString cipher,CString & plain);

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

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()

/////////////////////////////////////////////////////////////////////////////
// CPlayfairDlg dialog

CPlayfairDlg::CPlayfairDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CPlayfairDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CPlayfairDlg)
	m_cipher = _T("");
	m_dec = _T("");
	m_key = _T("");
	m_plain = _T("");
	m_keymtx = _T("密钥矩阵");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CPlayfairDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CPlayfairDlg)
	DDX_Text(pDX, IDC_EDIT_CIPHER, m_cipher);
	DDX_Text(pDX, IDC_EDIT_DEC, m_dec);
	DDX_Text(pDX, IDC_EDIT_KEY, m_key);
	DDX_Text(pDX, IDC_EDIT_PLAIN, m_plain);
	DDV_MaxChars(pDX, m_plain, 1000);
	DDX_Text(pDX, IDC_STATIC_KEYMTX, m_keymtx);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CPlayfairDlg, CDialog)
	//{{AFX_MSG_MAP(CPlayfairDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON_ENC, OnButtonEnc)
	ON_BN_CLICKED(IDC_BUTTON_DEC, OnButtonDec)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CPlayfairDlg message handlers

BOOL CPlayfairDlg::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 CPlayfairDlg::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 CPlayfairDlg::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 CPlayfairDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CPlayfairDlg::OnButtonEnc() 
{
	UpdateData(true);
	if(m_plain=="" || m_key=="") return;
	CString plain=m_plain;
	CString pExpand="";
	plainExpand(plain,pExpand);	//明文分组
	CString key=m_key;
	keyMtxGen(key);		//排列密钥矩阵

	CString strKeyMtx="";
	for(int i=0;i<5;i++)	//显示密钥矩阵
	{
		for(int j=0;j<5;j++)
			strKeyMtx=strKeyMtx+keyMtx[i][j]+" ";
		strKeyMtx=strKeyMtx+"\r";
	}
	m_keymtx=strKeyMtx;

	CString cipher="";
	playfairEnc(pExpand,cipher);		//加密
	m_cipher=cipher;
	UpdateData(false);
}

void CPlayfairDlg::OnButtonDec() 
{
	UpdateData(true);
	if(m_cipher=="" || m_key=="") return;
	CString key=m_key;
	keyMtxGen(key);		//排列密钥矩阵

	CString strKeyMtx="";
	for(int i=0;i<5;i++)	//显示密钥矩阵
	{
		for(int j=0;j<5;j++)
			strKeyMtx=strKeyMtx+keyMtx[i][j]+" ";
		strKeyMtx=strKeyMtx+"\r";
	}
	m_keymtx=strKeyMtx;

	CString cipher=m_cipher;
	CString plain="";
	playfairDec(cipher,plain);		//解密
	m_dec=plain;
	UpdateData(false);
}