desdlg.cpp

用des算法来进行加解密

// DESDlg.cpp : implementation file
//

#include "stdafx.h"
#include "DES.h"
#include "DESDlg.h"
#include <io.h>
#include <math.h>

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

/////////////////////////////////////////////////////////////////////////////
// CDESDlg dialog

CDESDlg::CDESDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CDESDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CDESDlg)
	m_nRadio = 0;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CDESDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CDESDlg)
	DDX_Control(pDX, IDC_EDIT_SFile, m_sfile);
	DDX_Control(pDX, IDC_EDIT_RFile, m_rfile);
	DDX_Control(pDX, IDC_EDIT_Plain, m_plain);
	DDX_Control(pDX, IDC_EDIT_Key, m_key);
	DDX_Control(pDX, IDC_EDIT_Cipher, m_cipher);
	DDX_Control(pDX, IDC_BUTTON_SB, m_sb);
	DDX_Control(pDX, IDC_BUTTON_RB, m_rb);
	DDX_Radio(pDX, IDC_RADIO1, m_nRadio);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CDESDlg, CDialog)
	//{{AFX_MSG_MAP(CDESDlg)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON_CC, OnClearCipher)
	ON_BN_CLICKED(IDC_BUTTON_CP, OnClearPlain)
	ON_BN_CLICKED(IDC_BUTTON_RB, OnRBrowse)
	ON_BN_CLICKED(IDC_BUTTON_SB, OnSBrowse)
	ON_BN_CLICKED(IDC_Decrypt, OnDecrypt)
	ON_BN_CLICKED(IDC_Encrypt, OnEncrypt)
	ON_BN_CLICKED(IDC_OutCipher, OnOutCipher)
	ON_BN_CLICKED(IDC_OutPlaint, OnOutPlaint)
	ON_BN_CLICKED(IDC_RADIO1, OnRadio1)
	ON_BN_CLICKED(IDC_RADIO2, OnRadio2)
	ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CDESDlg message handlers

BOOL CDESDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// 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
	SetWindowText("DES & 3DES");
	m_sb.EnableWindow(false);
	m_rb.EnableWindow(false);
	return TRUE;  // return TRUE  unless you set the focus to a control
}

// 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 CDESDlg::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 CDESDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CDESDlg::OnClearCipher() 
{
	// TODO: Add your control notification handler code here
	m_cipher.SetWindowText("");
}

void CDESDlg::OnClearPlain() 
{
	// TODO: Add your control notification handler code here
	m_plain.SetWindowText("");
}

void CDESDlg::ClearAll()
{
	m_plain.SetWindowText("");
	m_cipher.SetWindowText("");
	m_rfile.SetWindowText("");
	m_sfile.SetWindowText("");
}

void CDESDlg::OnRBrowse() 
{
	// TODO: Add your control notification handler code here
	static char BASED_CODE szFilter[] = "DES加密文件(*.des)|*.des|All Files (*.*)|*.*||";
	int result;
	FILE* handle;
	int filelen;
	//
	CFileDialog dlg(true, NULL, NULL, OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT, szFilter, NULL);
	if (dlg.DoModal()==IDOK)
	{
		rflag	=	1;	
		//
		ClearAll();
		//
		strcpy(rfilename, dlg.GetPathName());		
		//		
		handle	=	fopen(rfilename, "rb");
		filelen	=	filelength(fileno(handle));
		result	=	fclose(handle);
		if (filelen==0 || filelen%8!=0)
		{	
			MessageBox("密文长度不对");
			rflag	=	0;
			return;	
		}
		//
		m_rfile.SetWindowText(rfilename);
		m_rfile.UpdateWindow();	
		//读入
		result	=	copyfile(rfilename, RFILENAME);		
		//
		ShowRText();
	}
}

void CDESDlg::OnSBrowse() 
{
	// TODO: Add your control notification handler code here
	static char BASED_CODE szFilter[] = "Text Files (*.txt)|*.txt|All Files (*.*)|*.*||";
	int result;
	//
	CFileDialog dlg(true, NULL, NULL, OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT, szFilter, NULL);
	if (dlg.DoModal()==IDOK)
	{
		sflag	=	1;
		editflag	=	0;
		ClearAll();
		strcpy(sfilename, dlg.GetPathName());
		m_sfile.SetWindowText(sfilename);
		m_sfile.UpdateWindow();		
		//读入
		result	=	copyfile(sfilename, SFILENAME);		
		//
// 		ShowSText();		
	}	
}

int CDESDlg::copyfile(char *sfilename, char *dfilename)
{
	int result;
	result	=	CopyFile(sfilename, dfilename, FALSE);
	return 0;
}

void CDESDlg::OnDecrypt() 
{
	// TODO: Add your control notification handler code here
	if (m_key.GetWindowTextLength()==0)
	{
		MessageBox("请输入密钥");
		return;
	}
	int keylen=m_key.GetWindowTextLength();
	char *key;
	key=new char[keylen+1];
	memset(key,0,keylen+1);
	m_key.GetWindowText(key,keylen+1);
	if (m_nRadio==0)
	{
		memset(stext,0,TEXT_MAX+1);
		memset(rtext,0,TEXT_MAX+1);
		memset(rtext2,0,TEXT_MAX+1);
		m_cipher.GetWindowText(rtext2,TEXT_MAX);		
		int length =	m_cipher.GetWindowTextLength();
		
		if (length == 0 || length%16!=0)
		{
			MessageBox("非法密文");
			return;
		}
		HalfByteToByte(length);
		//解密工作
		des.DES_Act(stext,rtext,length,key,keylen,DECRYPT);
		m_plain.SetWindowText(stext);
	}
	if (m_nRadio==1)
	{
		int i;
		int filelen;
		FILE* handle;
		FILE* handle2;
		int result;
		//
		if (rflag==0)
		{
			MessageBox("请先选择密文文件");
			return;
		}
		handle	=	fopen(RFILENAME, "rb");	
		if (handle==NULL)
		{
			MessageBox("非法密文文件");		
			return;
		}
		filelen	=	filelength(fileno(handle));
		if (filelen==0 || filelen%8!=0)
		{
			MessageBox("密文长度不对");
			fclose(handle);
			return;
		}
		handle2	=	fopen(SFILENAME, "wb");
		//准备工作
		m_plain.SetWindowText("");
		m_cipher.SetWindowText("");
		//	
		for (i=0;i<filelen;i+=TEXT_MAX)
		{
			memset(rtext, 0, TEXT_MAX+1);
			memset(stext, 0, TEXT_MAX+1);
			rcount	=	fread(rtext, 1, TEXT_MAX, handle);
			des.DES_Act(stext,rtext,rcount,key,keylen,DECRYPT);
			result	=	fwrite(stext, 1, (rcount==TEXT_MAX)?TEXT_MAX:scount, handle2);
		}
		result	=	fclose(handle);
		result	=	fclose(handle2);
		//显示结果;
		sflag	=	1;
		ShowSText();
		ShowRText();
	}
}

void CDESDlg::OnEncrypt() 
{
	// TODO: Add your control notification handler code here
	if (m_key.GetWindowTextLength()==0)
	{
		MessageBox("请输入密钥");
		return;
	}
	int keylen=m_key.GetWindowTextLength();
	char *key;
	key=new char[keylen+1];
	memset(key,0,keylen+1);
	m_key.GetWindowText(key,keylen+1);
	if (m_nRadio==0)
	{
		memset(stext,0,TEXT_MAX+1);
		memset(rtext,0,TEXT_MAX+1);
		m_plain.GetWindowText(stext,TEXT_MAX);
 		int length =	m_plain.GetWindowTextLength()+1;
		m_plain.GetWindowText(stext,length);
		//加密工作
		des.DES_Act(rtext,stext,length,key,keylen,ENCRYPT);
		ShowCihper(ceil(length/8.0)*8);
	}
	if (m_nRadio==1)
	{
		int filelen;
		FILE* handle;
		FILE* handle2;
		int result;	
		if (sflag==0)
		{
			MessageBox("请先选择明文文件");
			return;
		}
		//准备工作
		m_rfile.SetWindowText("");
		m_plain.SetWindowText("");	
		//
		handle	=	fopen(SFILENAME, "rb");	
		if (handle==NULL)
		{
			MessageBox("非法明文文件");		
			return;
		}
		filelen	=	filelength(fileno(handle));