passwordtestdlg.cpp

使用c语言设计的加密算法,直接对文件流加密.用vc++做的使用界面

// PassWordTestDlg.cpp : implementation file
//

#include "stdafx.h"
#include "PassWordTest.h"
#include "PassWordTestDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CPassWordTestDlg dialog

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

void CPassWordTestDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CPassWordTestDlg)
	DDX_Text(pDX, IDC_FILEPATH, m_FilePath);
	DDX_Text(pDX, IDC_FILENAME, m_FileName);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CPassWordTestDlg, CDialog)
	//{{AFX_MSG_MAP(CPassWordTestDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_PWD, OnPwd)
	ON_BN_CLICKED(IDC_REPWD, OnRepwd)
	ON_BN_CLICKED(IDC_OPENFILE, OnOpenfile)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CPassWordTestDlg message handlers

BOOL CPassWordTestDlg::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
	AfxMessageBox("请注意：加密或解密生成的文件与原始文件在同一个目录下!");
	return TRUE;  // return TRUE  unless you set the focus to a control
}

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

void CPassWordTestDlg::OnPwd() 
{
	// TODO: Add your control notification handler code here
	CString strFileName,strFilePass,strOutFileName;
	
	GetDlgItemText(IDC_FILENAME,strFileName);
	
	GetDlgItemText(IDC_PASS,strFilePass);

	GetDlgItemText(IDC_OUTFILE,strOutFileName);
	
	if( (strFilePass.IsEmpty()) || (strFilePass.IsEmpty()) || (strOutFileName.IsEmpty()) )
	{
	
		AfxMessageBox("你输入的信息不完整，请确定填写完整!");

		GetDlgItem(IDC_PASS)->SetWindowText("");
		
		return;
	}

	char* pwd=strdup(strFilePass);//使用函数strdup使CString转换成为字符型数组

	FILE *fp1,*fp2;
	
	int flag=1;

	register char ch;
	
	int j=0;
	
	int j0=0;

	fp1=fopen(strFileName,"rb");
	
	if(fp1==NULL){
		
		AfxMessageBox("文件打开失败，请确定文件与工具在同一个目录下");
		
		exit(1);/*如果不能打开要加密的文件,便退出程序*/
		
	}

	ch=fgetc(fp1);

	if(ch=='-')flag=0;

	if(!flag)
	{
		AfxMessageBox("文件已加密过，请不要尝试再次加密!!");
		return;
	}
	
	fp2=fopen(strOutFileName,"wb");
	
	if(fp2==NULL){
		
		AfxMessageBox("加密文件写入失败，请重新尝试一次!");
		
		exit(1);/*如果不能建立加密后的文件,便退出*/
		
	}

	fseek(fp2,1,1);

	rewind(fp1);//重置FP1的位置
	
	while(pwd[++j0]);//利用j0判断密码的长度，如果异或的长度超过密码则重置
	
	ch=fgetc(fp1);
	
	/*加密算法开始*/
	
	while(!feof(fp1)){
		
		fputc(ch^pwd[j>=j0?j=0:j++],fp2);//异或后写入fp2文件
		
		ch=fgetc(fp1);
		
	}

	rewind(fp2);

	fputc('-',fp2);

	fseek(fp2,0,2);

	fclose(fp1);/*关闭源文件*/
	
	fclose(fp2);/*关闭目标文件*/

	if(AfxMessageBox("是否删除原始文件，只留下加密文件??",1)==IDOK)
	{
		if( remove(strFileName) != 0 )
		{
			AfxMessageBox("原始文件 "+strFileName+" 删除失败！");
		}

		AfxMessageBox("操作成功！");
	}

	exit(1);
}



void CPassWordTestDlg::OnRepwd() 
{
	// TODO: Add your control notification handler code here
	CString strFileName,strFilePass,strOutFileName;
	
	GetDlgItemText(IDC_FILENAME,strFileName);
	
	GetDlgItemText(IDC_PASS,strFilePass);

	GetDlgItemText(IDC_OUTFILE,strOutFileName);
	
	if( (strFilePass.IsEmpty()) || (strFilePass.IsEmpty()) || (strOutFileName.IsEmpty()) )
	{
	
		AfxMessageBox("你输入的信息不完整，请确定填写完整!");

		GetDlgItem(IDC_PASS)->SetWindowText("");
		
		return;
	}

	char* pwd=strdup(strFilePass);

	FILE *fp1,*fp2;
	
	int flag=1;

	register char ch;
	
	int j=0;
	
	int j0=0;

	fp1=fopen(strFileName,"rb");
	
	if(fp1==NULL){
		
		AfxMessageBox("文件打开失败，请确定文件与工具在同一个目录下");
		
		exit(1);/*如果不能打开要加密的文件,便退出程序*/
		
	}

	ch=fgetc(fp1);

	if(ch!='-')flag=0;

	if(!flag)
	{
		AfxMessageBox("文件还没有加密过，请不要尝试再次解密!!");
		return;
	}
	
	fp2=fopen(strOutFileName,"wb");
	
	if(fp2==NULL){
		
		AfxMessageBox("解密文件写入失败，请重新尝试一次!");
		
		exit(1);/*如果不能建立加密后的文件,便退出*/
		
	}
	
	while(pwd[++j0]);
	
	ch=fgetc(fp1);
	
	/*加密算法开始*/
	
	while(!feof(fp1)){
		
		fputc(ch^pwd[j>=j0?j=0:j++],fp2);/*异或后写入fp2文件*/
		
		ch=fgetc(fp1);
		
	}

	fclose(fp1);/*关闭源文件*/
	
	fclose(fp2);/*关闭目标文件*/

	if(AfxMessageBox("是否删除原始文件，只留下解密文件??",1)==IDOK)
	{
		if( remove(strFileName) != 0 )
		{
			AfxMessageBox("原始文件 "+strFileName+" 删除失败！");
		}

		AfxMessageBox("操作成功！");
	}

	exit(1);
	
}

void CPassWordTestDlg::OnOpenfile() 
{
	// TODO: Add your control notification handler code here
	
	CFileDialog dlg(true);
	
	dlg.DoModal();
	
	m_FileName=dlg.GetFileName();
	
	m_FilePath=dlg.GetPathName();

	UpdateData(false);
	
}