blowfish encrypt tooldlg.cpp

TEA 加密工具

// BlowFish Encrypt ToolDlg.cpp : implementation file
//

#include "stdafx.h"
#include "BlowFish Encrypt Tool.h"
#include "BlowFish Encrypt ToolDlg.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
typedef unsigned long ulong;
/////////////////////////////////////////////////////////////////////////////
// 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()

/////////////////////////////////////////////////////////////////////////////
// CBlowFishEncryptToolDlg dialog

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

void CBlowFishEncryptToolDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CBlowFishEncryptToolDlg)
	DDX_Text(pDX, IDC_EDIT1, m_srcfile);
	DDX_Text(pDX, IDC_EDIT2, m_tarfile);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CBlowFishEncryptToolDlg, CDialog)
	//{{AFX_MSG_MAP(CBlowFishEncryptToolDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON2, OnButton2)
	ON_BN_CLICKED(IDC_BUTTON1, OnOpen)
	ON_BN_CLICKED(IDC_BUTTON3, OnSave)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CBlowFishEncryptToolDlg message handlers

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

void CBlowFishEncryptToolDlg::OnOK() 
{
	// TODO: Add extra validation here
	UpdateData(TRUE);
	CFile file1;
	CFile file2;
	file1.Open(m_srcfile,CFile::modeRead);
	file2.Open(m_tarfile,CFile::modeCreate|CFile::modeWrite|CFile::modeNoTruncate);
	unsigned long key[]={0x8c,0xdb,0x39,0x73};
	unsigned long buffer[2];
	memset(buffer,0,sizeof(buffer));
	int filesize=file1.GetLength();
	for(int i=8;i<filesize;i+=8)
	{
	file1.Read(buffer,8);
	tea_encrypt(buffer,key);
	file2.Write(buffer,8);
	}
	memset(buffer,0,sizeof(buffer));
	int f=i-filesize;
	if(f>0)
	{
	int end=8%f;
	file1.Read(buffer,end);
	tea_decrypt(buffer,key);
	file2.Write(buffer,end);
	}
	file1.Close();
	file2.Close();
	MessageBox("Congratulations,Encrypt Finish!","Information",MB_OK);
	m_srcfile="";
	m_tarfile="";
	UpdateData(FALSE);
}

void CBlowFishEncryptToolDlg::OnButton2() 
{
	// TODO: Add your control notification handler code here
	UpdateData(TRUE);
	CFile file2;
	CFile file1;
	file1.Open(m_srcfile,CFile::modeRead);
	file2.Open(m_tarfile,CFile::modeCreate|CFile::modeWrite|CFile::modeNoTruncate);
	unsigned long key[]={0x8c,0xdb,0x39,0x73};
	unsigned long buffer[2];
	memset(buffer,0,sizeof(buffer));
	int filesize=file1.GetLength();
	for(int i=8;i<filesize;i+=8)
	{
	file1.Read(buffer,8);
	tea_decrypt(buffer,key);
	file2.Write(buffer,8);
	}
	memset(buffer,0,sizeof(buffer));
	int f=i-filesize;
	if(f>0)
	{
	int end=8%f;
	file1.Read(buffer,end);
	tea_decrypt(buffer,key);
	file2.Write(buffer,end);
	}
	file1.Close();
	file2.Close();
	MessageBox("Congratulations,Decrypt Finish!","Information",MB_OK);
	m_srcfile="";
	m_tarfile="";
	UpdateData(FALSE);
	
}

void CBlowFishEncryptToolDlg::tea_encrypt(unsigned long* v, unsigned long* k) 
{
    unsigned  long v0=v[0], v1=v[1], sum=0, i;    
    unsigned  long delta=0x9e3779b9;                    
    unsigned  long k0=k[0], k1=k[1], k2=k[2], k3=k[3];   
     for (i=0; i < 32; i++)
    {                            
         sum += delta;
         v0 += ((v1<<4) + k0) ^ (v1 + sum) ^ ((v1>>5) + k1);
         v1 += ((v0<<4) + k2) ^ (v0 + sum) ^ ((v0>>5) + k3); 
     }
     v[0]=v0; v[1]=v1;
  }
 
 void CBlowFishEncryptToolDlg::tea_decrypt(unsigned long* v, unsigned long* k) 
{     
     unsigned long v0=v[0], v1=v[1], sum=0xC6EF3720, i; 
     unsigned long delta=0x9e3779b9;      
     unsigned  long k0=k[0], k1=k[1], k2=k[2], k3=k[3];     
     for(i=0; i<32; i++) 
     {                               
         v1 -= ((v0<<4) + k2) ^ (v0 + sum) ^ ((v0>>5) + k3);
         v0 -= ((v1<<4) + k0) ^ (v1 + sum) ^ ((v1>>5) + k1);
         sum -= delta;                 
     }
     v[0]=v0; v[1]=v1;
   
 }

void CBlowFishEncryptToolDlg::OnOpen() 
{
	// TODO: Add your control notification handler code here
	CFileDialog OpenFile(TRUE);
	OpenFile.m_ofn.lpstrTitle="Open File";
	OpenFile.m_ofn.lpstrFilter="Text Files(*.txt)\0*.txt\0Dat Files(*.dat)\0*.dat\0All Files(*.*)\0*.*\0\0";
	if(IDOK==OpenFile.DoModal())
	{
		m_srcfile=OpenFile.GetPathName();
		UpdateData(FALSE);
	}


}

void CBlowFishEncryptToolDlg::OnSave() 
{
	// TODO: Add your control notification handler code here
	CFileDialog SaveFile(FALSE);
	SaveFile.m_ofn.lpstrFilter="Text Files(*.txt)\0*.txt\0Dat File(*.dat)\0*.dat\0All Files(*.*)\0*.*\0\0";
	SaveFile.m_ofn.lpstrDefExt="dat";
	if(IDOK==SaveFile.DoModal())
	{
		m_tarfile=SaveFile.GetPathName();
		UpdateData(FALSE);
	}
}