deszahdlg.cpp

自己编写的DES加密/解密完整源程序, Windows界面.是用VC6MFC编写的.包括ECB和CBC两种模式.

// DESzahDlg.cpp : implementation file
//
#include "stdafx.h"
#include "DESzah.h"
#include "DESzahDlg.h"
#include "DES.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()

/////////////////////////////////////////////////////////////////////////////
// CDESzahDlg dialog

CDESzahDlg::CDESzahDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CDESzahDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CDESzahDlg)
	m_mode =0;		//设置初始状态为ECB加密模式
	m_cipher = _T("");
	m_dec = _T("");
	m_iv = _T("00000000");
	m_key = _T("00000000");
	m_plain = _T("This is sampe text!");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);

}

void CDESzahDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CDESzahDlg)
	DDX_Control(pDX, IDC_EDIT_PLAIN, m_edit_plain);
	DDX_Control(pDX, IDC_EDIT_KEY, m_edit_key);
	DDX_Control(pDX, IDC_EDIT_IV, m_edit_iv);
	DDX_Radio(pDX, IDC_RADIO_ECB, m_mode);
	DDX_Text(pDX, IDC_EDIT_CIPHER, m_cipher);
	DDX_Text(pDX, IDC_EDIT_DEC, m_dec);
	DDX_Text(pDX, IDC_EDIT_IV, m_iv);
	DDV_MaxChars(pDX, m_iv, 8);
	DDX_Text(pDX, IDC_EDIT_KEY, m_key);
	DDV_MaxChars(pDX, m_key, 8);
	DDX_Text(pDX, IDC_EDIT_PLAIN, m_plain);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CDESzahDlg, CDialog)
	//{{AFX_MSG_MAP(CDESzahDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_RADIO_ECB, OnRadioEcb)
	ON_BN_CLICKED(IDC_RADIO_CBC, OnRadioCbc)
	ON_BN_CLICKED(IDC_BUTTON_ENC, OnButtonEnc)
	ON_BN_CLICKED(IDC_BUTTON_DEC, OnButtonDec)
	ON_EN_CHANGE(IDC_EDIT_PLAIN, OnChangeEditPlain)
	ON_EN_CHANGE(IDC_EDIT_KEY, OnChangeEditKey)
	ON_EN_CHANGE(IDC_EDIT_IV, OnChangeEditIv)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CDESzahDlg message handlers

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


void CDESzahDlg::OnChangeEditPlain() 
{
	UpdateData(true);
}

void CDESzahDlg::OnChangeEditKey() 
{
	UpdateData(true);	
}

void CDESzahDlg::OnChangeEditIv() 
{
	UpdateData(true);	
}

void CDESzahDlg::OnRadioEcb() 
{
	if(m_mode==0) return;
	m_edit_iv.SetReadOnly(true);	//设置输入初始向量编辑框只读
	m_mode=0;	//当前模式
	m_cipher.Empty();	//清空密文框
	m_dec.Empty();		//清空解密结果框
	UpdateData(false);
}

void CDESzahDlg::OnRadioCbc() 
{
	if(m_mode==1) return;
	m_edit_iv.SetReadOnly(false);
	m_mode=1;
	m_cipher.Empty();
	m_dec.Empty();
	UpdateData(false);
}

void CDESzahDlg::OnButtonEnc() 
{	
	int length=m_plain.GetLength();
	char *plain=new char[length+8];
	memset(plain,0,length+8);//////////////////////
	if(length==0)
	{
		MessageBox("请输入明文!","错误");
		return;
	}else
		memcpy(plain,LPCTSTR(m_plain),length);

	char key[8];
	if(m_key.GetLength()!=8)
	{
		MessageBox("密钥必须为8个字符长度!","错误");
		return;
	}else
		memcpy(key,LPCTSTR(m_key),8);

	char iv[8];
	if(m_mode!=0)
		if(m_iv.GetLength()!=8)
		{
			MessageBox("初始向量必须为8个字符长度!","错误");
			return;
		}else
			memcpy(iv,LPCTSTR(m_iv),8);

	DES::getSubKeys(key);		//获得子密钥

	char *cipher=new char[length+8];
	memset(cipher,0,length+8);//////////////////////////

	switch(m_mode)
	{
	case 0:
		DES::desECB(plain,cipher,length,DES::ENCRYPT);	//ECB加密
		break;
	case 1:
		DES::desCBC(plain,cipher,iv,length,DES::ENCRYPT);//CBC加密
		break;
	}
	m_cipher=cipher;////////////////////////////////
	UpdateData(false);
	delete []plain;
	delete []cipher;
}

void CDESzahDlg::OnButtonDec() 
{
	int length=m_cipher.GetLength();
	char *cipher=new char[length+8];
	memset(cipher,0,length);///////////////////////////
	if(length==0)
	{
		MessageBox("密文为空!","错误");
		return;
	}else
		memcpy(cipher,LPCTSTR(m_cipher),length);

	char key[8];
	if(m_key.GetLength()!=8)
	{
		MessageBox("密钥必须为8个字符长度!","错误");
		return;
	}else
		memcpy(key,LPCTSTR(m_key),8);

	char iv[8];
	if(m_mode!=0)
		if(m_iv.GetLength()!=8)
		{
			MessageBox("初始向量必须为8个字符长度!","错误");
			return;
		}else
			memcpy(iv,LPCTSTR(m_iv),8);

	DES::getSubKeys(key);		//获得子密钥

	char *plain=new char[length+8];

	memset(plain,0,length+8);////////////////////////////////////
	switch(m_mode)
	{
	case 0:
		DES::desECB(cipher,plain,length,DES::DECRYPT);	//ECB解密
		break;
	case 1:
		DES::desCBC(cipher,plain,iv,length,DES::DECRYPT);//CBC解密
		break;

	}

	m_dec=plain;
	UpdateData(false);
	delete []cipher;
	delete []plain;

}