cipherdlg.cpp

本实例利用VisualC++6.0来实现了一个古典密码加密程序

// CipherDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Cipher.h"
#include "CipherDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// 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()

/////////////////////////////////////////////////////////////////////////////
// CCipherDlg dialog

CCipherDlg::CCipherDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CCipherDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CCipherDlg)
	m_vPlain = _T("");
	m_caesar = -1;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
	int j=0;
	for(char i='A';i<='Z';i++) //初始化字符数组
	{
		character[j]=i;
		j++;
	}
	m_caesar=-1; //初始化加密方式
}

void CCipherDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CCipherDlg)
	DDX_Control(pDX, IDC_KEY, m_Key);
	DDX_Control(pDX, IDC_CIPERTEXT, m_CiperText);
	DDX_Text(pDX, IDC_PLAINTEXT, m_vPlain);
	DDX_Radio(pDX, IDC_CAESAR, m_caesar);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CCipherDlg, CDialog)
	//{{AFX_MSG_MAP(CCipherDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_CAESAR, OnCaesar)
	ON_BN_CLICKED(IDC_COLUMN, OnColumn)
	ON_BN_CLICKED(IDC_ENCRYPT, OnEncrypt)
	ON_BN_CLICKED(IDC_RESET, OnReset)
	ON_BN_CLICKED(IDC_VIGENERE, OnVigenere)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCipherDlg message handlers

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



void CCipherDlg::OnCaesar() 
{
	// TODO: Add your control notification handler code here
	GetDlgItem(IDC_PLAINTEXT)->SetWindowText("abcde");
	m_Key.EnableWindow(false);
	m_Key.SetWindowText("k=3");
	m_CiperText.SetWindowText("");
	flag=0; //选择凯撒
}

void CCipherDlg::OnColumn() 
{
	// TODO: Add your control notification handler code here
	GetDlgItem(IDC_PLAINTEXT)->SetWindowText("whatyoucanfromthisbook");
	m_Key.SetWindowText("k=5");
	m_Key.EnableWindow(false);
	m_CiperText.SetWindowText("");
	flag=2; //选择列换位
}

void CCipherDlg::OnEncrypt() 
{
	// TODO: Add your control notification handler code here
	CString msg;
	GetDlgItemText(IDC_PLAINTEXT,msg);
	CString key;
	GetDlgItemText(IDC_KEY,key);
	switch(flag)
	{
	case 0:msg=Caesar(msg,msg.GetLength()); //选择凯撒算法
		   break;
	case 1:msg=Vigenere(msg,key,msg.GetLength(),key.GetLength()); //选择维吉尼亚算法
		   break;
		   //msg=Vigenere();
	case 2:msg=Column(msg,msg.GetLength()); //选择列换位算法
		   break;
		//
	default:AfxMessageBox("选择加密方法先！"); //处理出错
		    break;
	}
	m_CiperText.SetWindowText(msg);
}

void CCipherDlg::OnReset() 
{
	// TODO: Add your control notification handler code here
	SetDlgItemText(IDC_PLAINTEXT,"");
	if(flag==1)
	{
		m_Key.EnableWindow(true);
	    m_Key.SetWindowText("");
	}
	m_CiperText.SetWindowText("");
}

void CCipherDlg::OnVigenere() 
{
	// TODO: Add your control notification handler code here
    GetDlgItem(IDC_PLAINTEXT)->SetWindowText("howareyou");
	m_Key.SetWindowText("your");
	m_Key.EnableWindow(true);
	m_CiperText.SetWindowText("");
	flag=1; //选择维吉尼亚
}

CString CCipherDlg::Column(CString m, int length=1) //列换位算法
{
	int n=0,i=0,j=0,count=0;
	if(m=="") //确定输入明文
	{
		AfxMessageBox("输入明文先！");
		return("");
	}
	for(i=0;i<length;i++) //将小写转换为大写
		if(m[i]>='a'&&m[i]<='z')
			m.SetAt(i,m[i]-32);
	if(length%5!=0) //确定矩阵的行数
	{
		n=length/5+1;
		for(i=length;i<n*5;i++)
			m.Insert(i,'X');
	}
	else
		n=length/5;
	CString tmp=m; //暂存变量
	if(n>1)     //列换位算法
	{
		for(i=0;i<=4;i++)
			for(j=0;j<n;j++) //列优先赋值
			{
				int pos=i+5*j; 
			    tmp.SetAt(count,m[pos]);
			    count++;
			}
	}
	for(i=0;i<count;i++) //修改信息
		m.SetAt(i,tmp[i]);
	return m;
}

CString CCipherDlg::Vigenere(CString m, CString k, int lm=1, int lk=1) //维吉尼亚算法
{
	int i=0;
	CString tmp=m; //暂存变量
	if(m=="") //确定输入明文
	{
		AfxMessageBox("输入明文先！"); 
	}
	if(k=="")  //确定输入密钥
	{
		AfxMessageBox("输入密钥先！");
		return("");
	}
	for(;i<lm;i++) //将密钥循环扩充至和明文相同的长度
		tmp.SetAt(i,k[i%lk]);
	k=tmp;  //得到新的密钥
	for(i=0;i<lm;i++)
	{
		if(m[i]>='a'&&m[i]<='z') //若明文字符为小写，转换为大写
			m.SetAt(i,m[i]-32);
		if(k[i]>='a'&&k[i]<='z') //若密钥字符为小写，转换为大写
			k.SetAt(i,k[i]-32);
		int pos=((m[i]-64)+(k[i]-64)-1)%26; //维吉尼亚算法，(列+行偏移) mod 26
		if(pos==0)  //确定临界值
			pos=26;
		m.SetAt(i,character[pos-1]);//修改信息

	}
	SetDlgItemText(IDC_KEY,k);
	return m;
}

CString CCipherDlg::Caesar(CString m, int length)  //凯撒算法
{
	int i=0;
	int k=3;
	if(m=="") //确定输入明文
	{
		AfxMessageBox("输入明文先！");
		return("");
	}
	for(;i<length;i++) 
	{
		if(m[i]>='a'&&m[i]<='z') //若是小写，转换为大写
			m.SetAt(i,m[i]-32);
		int pos=(m[i]-65+k)%26; //凯撒算法
		m.SetAt(i,character[pos]); //修改信息
	}
	return m;
}