cryptographydlg.cpp

实现了凯撒、Playfair维吉尼亚和置换算法的MFC加解密程序。

// CryptographyDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Cryptography.h"
#include "CryptographyDlg.h"
#include <iostream>
#include <fstream>
using namespace std;



#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()

/////////////////////////////////////////////////////////////////////////////
// CCryptographyDlg dialog

CCryptographyDlg::CCryptographyDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CCryptographyDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CCryptographyDlg)
	m_StrCipInPut = _T("");
	m_StrPlainTextOut = _T("");
	m_StrPlaintTextInPut = _T("");
	Choose = 1;
	m_StrPass = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CCryptographyDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CCryptographyDlg)
	DDX_Text(pDX, IDC_EDIT_Cip_InOrOut, m_StrCipInPut);
	DDX_Text(pDX, IDC_EDIT_PlainText_Out, m_StrPlainTextOut);
	DDX_Text(pDX, IDC_EDIT_PlaintText_InPut, m_StrPlaintTextInPut);
	DDX_Text(pDX, IDC_EDIT_Pass, m_StrPass);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CCryptographyDlg, CDialog)
	//{{AFX_MSG_MAP(CCryptographyDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON_Encrypt, OnBUTTONEncrypt)
	ON_BN_CLICKED(IDC_BUTTON_Decrypt, OnBUTTONDecrypt)
	ON_BN_CLICKED(IDC_RADIO_Caesar, OnRADIOCaesar)
	ON_BN_CLICKED(IDC_RADIO_Playfair, OnRADIOPlayfair)
	ON_BN_CLICKED(IDC_RADIO_Vigenere, OnRADIOVigenere)
	ON_BN_CLICKED(IDC_RADIO_Permutation, OnRADIOPermutation)
	ON_BN_CLICKED(IDC_BUTTON_Choose, OnBUTTONChoose)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCryptographyDlg message handlers

BOOL CCryptographyDlg::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
	((CButton *)GetDlgItem(IDC_RADIO_Caesar))->SetCheck(1);
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CCryptographyDlg::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 CCryptographyDlg::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 CCryptographyDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

//加密
void CCryptographyDlg::OnBUTTONEncrypt() 
{
	// TODO: Add your control notification handler code here
	int i;
	i = Choose;
	switch(i)
	{
	case 1:
		Caesar();
		break;
	case 2:
		Playfair();
		break;
	case 3:
		Vigenere();
		break;
	case 4:
		Permutation();
		break;
	default:
		break;
	}
}

//解密
void CCryptographyDlg::OnBUTTONDecrypt() 
{
	// TODO: Add your control notification handler code here
	int i;
	i = Choose;
	switch(i)
	{
	case 1:
		CaesarDecrypt();
		break;
	case 2:
		PlayfairDecrypt();
		break;
	case 3:
		VigenereDecrypt();
		break;
	case 4:
		PermutationDecrypt();
		break;
	default:
		break;
	}
}

void CCryptographyDlg::OnRADIOCaesar() 
{
	// TODO: Add your control notification handler code here
		Choose = 1;
}

void CCryptographyDlg::OnRADIOPlayfair() 
{
	// TODO: Add your control notification handler code here
	Choose = 2;
}

void CCryptographyDlg::OnRADIOVigenere() 
{
	// TODO: Add your control notification handler code here
		Choose = 3;
}

void CCryptographyDlg::OnRADIOPermutation() 
{
	// TODO: Add your control notification handler code here
		Choose = 4;
}

//选择明文
void CCryptographyDlg::OnBUTTONChoose() 
{
	// TODO: Add your control notification handler code here
	UpdateData(true);
	static char BASED_CODE szFilter[] = "文本文件(*.txt)|*.txt";
	//创建文件对话框对象
	CFileDialog file(TRUE,NULL,NULL,OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT,NULL,NULL);
	if (file.DoModal() == IDOK)
	{	
		CString FilePath = file.GetPathName();					//获取文件路径
		CString FileName  = file.GetFileTitle();				//获取文件名
		UpdateData(false);
		Openfile(FilePath);	
	}
}

//根据文件路径读取文件
void CCryptographyDlg::Openfile(CString FilePath)
{
	UpdateData(true);
	char FileArray[1000];
	memset(&FileArray,0,1000);
	ifstream myFile;
	myFile.open(((char *)FilePath.GetBuffer(1)),ios_base::in);
	while(myFile.getline(FileArray,1000))						//每次读取一行
	{
		
		m_StrPlaintTextInPut += FileArray;
		
	}
	myFile.close();
	UpdateData(false);
}

//凯撒密码
void CCryptographyDlg::Caesar()
{
	UpdateData(TRUE);
	CString table = "abcdefghijklmnopqrstuvwxyz";				//字母表
	CString str;
	int i = 0,j = 0,k = 0;
	int	Length = m_StrPlaintTextInPut.GetLength();				//获取明文长度
	while (i<Length)
	{
		j= (table.Find(m_StrPlaintTextInPut.GetAt(i))+3)%26;	//通过将字母按顺序推后起3位起到加密作用
		i++;
		str += table.GetAt(j);
	}
	m_StrCipInPut = str;
	UpdateData(FALSE);
}

void CCryptographyDlg::CaesarDecrypt()
{
	UpdateData(TRUE);
	CString table = "abcdefghijklmnopqrstuvwxyz";				//字母表
	CString str,str1;
	int i = 0,j = 0,k = 0;
	int	Length = m_StrCipInPut.GetLength();						//获取密文长度
	str1 = m_StrCipInPut;
	while (i<Length)											//通过将字母按顺序前移起3位起到解密作用
	{	
		j= ((table.Find(str1.GetAt(i))-3)+26)%26;
		i++;
		str += table.GetAt(j);
	}
	m_StrPlainTextOut = str;
	UpdateData(FALSE);
}

//Playfair密码
void CCryptographyDlg::Playfair()
{
	UpdateData(TRUE);
	m_StrCipInPut = "";

	//构建Playfair密表
	CString str[20];
	char FileArray[5];
	memset(&FileArray,0,5);
	ifstream myFile;
	int i = 0,j = 0,m = 0,n = 0,l = 0,q = 0,p = 0,row = 0,col = 0;
	myFile.open("Playfair.txt",ios_base::in);						//读取Playfair密表
	while(myFile.getline(FileArray,20)&&i<5)						
	{
		str[i].Format("%s",FileArray);
		i++;
	}
	myFile.close();

	CString str1;
	m_StrCipInPut = m_StrPlaintTextInPut;
	int Length = m_StrCipInPut.GetLength();

	//相同对中的字母加分隔符(如x) 
	for (i = 0,j = 1;j<Length;i = i+2,j = j+2)
	{
		if (m_StrCipInPut.GetAt(i) == m_StrCipInPut.GetAt(j))
		{
			m_StrCipInPut.Insert(j,'x');
			Length = Length+1;
		}	
	}

	//若明文长度为奇数则在其末尾添加一个x
	if(Length%2 == 1)										
	{