cryptographydlg.cpp

用VC++做的一个加密解密算法

// CryptographyDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Cryptography.h"
#include "CryptographyDlg.h"

#include <stdio.h>
#include <conio.h>
#include <string.h>
#include <malloc.h>
#include <math.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()

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

CCryptographyDlg::CCryptographyDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CCryptographyDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CCryptographyDlg)
	m_nPasswordType = -1;
	m_nFirstText = _T("");
	m_nLastText = _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_Radio(pDX, IDC_RADIO_CAESAR, m_nPasswordType);
	DDX_Text(pDX, IDC_EDIT1, m_nFirstText);
	DDX_Text(pDX, IDC_EDIT2, m_nLastText);
	//}}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_EXIT_PROGRAME, OnExitPrograme)
	ON_BN_CLICKED(IDC_INCREASE_SECRET, OnIncreaseSecret)
	ON_BN_CLICKED(IDC_BREAK_SECRET, OnBreakSecret)
	ON_BN_CLICKED(IDC_ABOUT_AUTHOR, OnAboutAuthor)
	//}}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
	
	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;
}



///////////////////根据密钥词来构造矩阵,已知构造的矩阵为5*5的形式////////////////////////
////////////////////密钥为：MONARCHY/////////////////////////////////////////
//////////////////////该距阵在playfair加密解密算法中要用到///////////////////////////////
char Metrix[5][5] = {
						'M','O','N','A','R',
						'C','H','Y','B','D',
						'E','F','G','I','K',
						'L','P','Q','S','T',
						'U','V','W','X','Z',
					};

///////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////对文件加密/////////////////////////////////////////
void CCryptographyDlg::OnIncreaseSecret() 
{
	UpdateData(TRUE);
	if(m_nPasswordType == -1)
	{
		MessageBox("请选择你的加密类型！",NULL,MB_OK);
		return;
	}

	UpdateData(TRUE);
	if (m_nFirstText == "")
	{
		MessageBox("请输入你要加密的明文！",NULL,MB_OK);
		return;
	}


	UpdateData(TRUE);
	switch(m_nPasswordType)
	{
	case 0:     //Caesar密码加密
		{
			UpdateData(TRUE);   //获取文本框中输入的内容
			CString str = "";
			char tempChar; //定义一个临时的字符变量
			tempChar = m_nFirstText.GetAt(0);
			int Length = m_nFirstText.GetLength();
			m_nFirstText.MakeUpper();
			for (int i = 0;i < Length; i ++)
			{
				tempChar = m_nFirstText.GetAt(i);
				if (' ' == tempChar)  //对于空格符，直接保留空格，不做转换
				{
					tempChar = tempChar;
				}
				else if (tempChar == 'X' || tempChar == 'Y' || tempChar == 'Z')
				{
					tempChar = tempChar + 3 - 26;
				}
				else
				{
					tempChar = tempChar + 3;
				}	
				str = str + tempChar;
			}
			m_nLastText = str;
			UpdateData(FALSE);    //将转换后内容输出到文本框中
		}
		break;
	case 1:  //Playfair密码加密
		{
			int Length = 0;		//密文长度
			int LengthKey = 0;	//密钥长度
			int i = 0;
			int j = 0;
			char tempChar1;    //用于保存加密后该字符对第一个字符的值
			char tempChar2;    //用于保存加密后该字符对第二个字符的值
			CString StrCipherTemp = "";//定义密文
			CString strKey = "monarchy";
			strKey.MakeUpper();
			Length = m_nFirstText.GetLength();
			m_nFirstText.MakeUpper();
			LengthKey = strKey.GetLength();

								  //当一个字母对的两个字母相同时，那
			//char FillChar = 'x';  //么在他们之间加上一个填充字母x。

			int  RowX1;         //第一个字母的行号
			int  ColumnY1 ;     //第一个字母的列号
			int  RowX2;         //第二个字母的行号
			int  ColumnY2;      //第二个字母的列号


////////////////////////////对密文加密/////////////////////////////////
			for (i = 0;i < Length;i = i + 2)
			{
				if (m_nFirstText.GetAt(i) == m_nFirstText.GetAt(i + 1))
				{
					m_nFirstText.Insert(i + 1,'X');		//在字符串的指定位置插入一个字符
					Length = m_nFirstText.GetLength();  //字符串的长度增加1
				}

				//如果字符个数为奇数,在字符串的末尾追加一个字符'x'.
				if (Length % 2 != 0)
				{
					m_nFirstText.Insert(Length,'X');
				}
					//碰到字母j则将字母J所在的位置用字母i来代替
					if(m_nFirstText.GetAt(i) == 'J')  
						m_nFirstText.SetAt(i,'I');    
					if(m_nFirstText.GetAt(i + 1) == 'J')
						m_nFirstText.SetAt(i + 1,'I');


					//获得指定字符对的行号和列号
					RowX1  = GetX(m_nFirstText.GetAt(i));
					ColumnY1  = GetY(m_nFirstText.GetAt(i));
					RowX2 = GetX(m_nFirstText.GetAt(i + 1));
					ColumnY2 = GetY(m_nFirstText.GetAt(i + 1));

					//如果该字母对落在矩阵同一行则由其右边的字母来代替
					if(RowX1 == RowX2)   //行号相同  
					{
						tempChar1 = Metrix[RowX1][((ColumnY1 + 1) % 5)];
						tempChar2 = Metrix[RowX1][((ColumnY2 + 1) % 5)];
					}
					//如果该字母对落在矩阵同一列则由其下边的字母来代替
					else if(ColumnY1 == ColumnY2) //列号相同
					{	
						tempChar1 = Metrix[((RowX1 + 1) % 5)][ColumnY1];
						tempChar2 = Metrix[((RowX2 + 1) % 5)][ColumnY1];
					}
					////对于其他情况的,该字母所在的行为密文所在行，
					////另一字母所在列为密文所在列
					else 
					{
						tempChar1 = Metrix[RowX1][ColumnY2];
						tempChar2 = Metrix[RowX2][ColumnY1];
					}
					StrCipherTemp = StrCipherTemp + tempChar1 + tempChar2;
					m_nLastText = StrCipherTemp;
					m_nLastText.MakeLower();
					UpdateData(FALSE);
				}
		}	
		break;
 	case 2:   //Vigenere密码加密
		{
			int Length = 0;					//定义明文的长度
			int LengthKey = 0;				//定义密钥的长度
			int i = 0;
			int j = 0;
			CString strKey = "deceptive";   //定义密钥
			strKey.MakeUpper();			    //将密钥字符串全部变为大些