desdlg.cpp

信息安全课上project,des算法的程序,不知道有没有用.

// desDlg.cpp : implementation file
//

#include "stdafx.h"
#include "des.h"
#include "desDlg.h"
#include "des1.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()

/////////////////////////////////////////////////////////////////////////////
// CDesDlg dialog

CDesDlg::CDesDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CDesDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CDesDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	sourcefile = _T("");
	keyfile = _T("");
	resultfile = _T("");
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CDesDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	DDX_Text(pDX,IDC_EDIT2,sourcefile);
	DDX_Text(pDX,IDC_EDIT3,keyfile);
	DDX_Text(pDX,IDC_EDIT4,resultfile);
	
	//{{AFX_DATA_MAP(CDesDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CDesDlg, CDialog)
	//{{AFX_MSG_MAP(CDesDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON1, scan)
	ON_BN_CLICKED(IDC_BUTTON3, scan2)
	ON_BN_CLICKED(IDC_BUTTON4, scan3)
	ON_BN_CLICKED(IDC_BUTTON5, cbc)
	ON_BN_CLICKED(IDC_BUTTON7, decipher)
	ON_BN_CLICKED(IDC_BUTTON6, cancel)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CDesDlg message handlers

BOOL CDesDlg::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 CDesDlg::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 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::scan() 
{
	UpdateData(TRUE);
	CFileDialog dlg(1,NULL,NULL,OFN_HIDEREADONLY,"ALL Files(*.*)|*.*||");
	if(IDOK!=dlg.DoModal())return;
	sourcefile=dlg.GetPathName();
	UpdateData(FALSE);
}

void CDesDlg::scan2() 
{
	UpdateData(TRUE);
	CFileDialog dlg(1,NULL,NULL,OFN_HIDEREADONLY,"ALL Files(*.*)|*.*||");
	if(IDOK!=dlg.DoModal())return;
	keyfile=dlg.GetPathName();
	UpdateData(FALSE);
}

void CDesDlg::scan3() 
{
	UpdateData(TRUE);
	CFileDialog dlg(1,NULL,NULL,OFN_HIDEREADONLY,"ALL Files(*.*)|*.*||");
	if(IDOK!=dlg.DoModal())return;
	resultfile=dlg.GetPathName();
	UpdateData(FALSE);
}

void CDesDlg::cbc() 
{
	int i = 0;
	int *key = new int[64];
	fpm = fopen(sourcefile, "r");
	fpk = fopen(keyfile, "r");
	fpc = fopen(resultfile, "w");
	for(i = 0; i < 64; i ++)
		key[i] = fgetc(fpk);
	fclose(fpk);
	makesubkey(key);
	CBC(fpm, fpc);
	fclose(fpc);
	AfxMessageBox("Completed!");
}


void CBC(FILE *m, FILE *c)
{
	int i = 0;
	int signal = 1;
	int ch = 0;
	int *work = new int[64]; 
	int *r = new int[64];
	r = IV;
	while(signal)
	{
		if((ch = fgetc(m)) == EOF)
			return;
		work[0] = ch - '0';
		for(i = 1; i < 64; i ++)
			if((ch = fgetc(m)) == EOF)
			{
				for(; i < 64; i ++)
					work[i] = 0;
				signal = 0;
				break;
			}
			else
				work[i] = ch - '0';
		r = cipher(work, r);           //des加密函数调用
		for(i = 0; i < 64; i ++)
			printf("%d",r[i]);
		printf("\n");
		for(i = 0; i < 64; i ++)
		{
			work[i] = r[i] + '0';
			fputc(work[i], c);
		}
	}

}

int* cipher(int *m, int *c) //
{
	int i = 0;
	int t = 0;
	int ch = 0;
	int signal = 1;
	int *r = new int[32];
	int left[2][32] ;
	int right[2][32] ;
	int *temp = new int[64];
	int *work = new int[64];
	for(i = 0; i < 64; i ++)  //
		work[i] = (m[i] + c[i]) % 2;  //


//      ip 置换
		for(i = 0; i < 64; i ++)
		{
			temp[i] = work[IP[i]];
		}
//      轮函数
		for(i = 0; i < 32; i ++)
		{
			left[0][i] = temp[i];
			right[0][i] = temp[i + 32];
		}
		for(t = 0; t < 4; t ++)
		{
			r = right[t % 2];
			r = F(r, subkey[t]);
			for(i = 0; i < 32; i ++)
			{
				left[(t + 1)%2][i] = right[t%2][i];
				right[(t + 1)%2][i] = (left[t%2][i] + r[i]) %2;
			}
		}
		for(i = 0; i < 32; i ++)
		{
			temp[i] = left[0][i];
			temp[i + 32] = right[0][i];
		}
//		ip逆置换
		for(i = 0; i < 64; i ++)
		{
			work[i] = temp[IPN[i]] ; //
//			fputc(work[i], c);
		}
//	}
		return work; //
}


void makesubkey(int *key)
{
	int i = 0;
	int n = 0;
	int temp[56];
	int left[28];
	int right[28];
	for(i = 0; i < 28; i ++)
	{
		left[i] = key[IPC[i]];
		right[i] = key[IPC[i + 28]];
	}
	for(n = 0; n < 4; n ++)
	{
		for(i = 0; i < 28; i ++)
		{
			temp[i] = left[(i + CYC[n]) % 28];
			temp[i + 28] = right[(i + CYC[n]) % 28];
		}
		for(i = 0; i < 28; i ++)
		{
			left[i] = temp[i];
			right[i] = temp[i + 28];
		}
		for(i = 0; i < 48; i ++)
		{
			subkey[n][i] = temp[PC[i]];
		}
	}
}

int * F(int *right, int *skey)
{
	int i = 0;
	int j = 0;
	int h = 0;
	int m = 0;
	int n = 0;
	int x = 0;
	int *result = new int[32];
	int *temp = new int[32];
	int work[48];
	int q[6];

	for(i = 0; i < 48; i ++)
	{
		work[i] = right[E[i]];
		work[i] = (work[i] + skey[i])%2;
	}

	for(i = 0; i < 8; i ++)
	{
		for(j = 0; j < 6; j ++)
			q[j] = work[6 * i + j];
		m = 2 * q[0] + q[5];
		n = 8 * q[1] + 4 * q[2] + 2 * q[3] + q[4];
		x = S[i][m][n];
		for(h = 0; h < 4; h ++)
		{	
			temp[ 3 + 4 * i -h] = x % 2;
			x = x / 2;
		}
	}
	for(i = 0; i < 32; i ++)
		result[i] = temp[P[i]];
	return result;
}

void CDesDlg::decipher() 
{
	int i = 0;
	int *key = new int[64];
	fpm = fopen(sourcefile, "r");
	fpk = fopen(keyfile, "r");
	fpc = fopen(resultfile, "w");
	for(i = 0; i < 64; i ++)
		key[i] = fgetc(fpk);
	fclose(fpk);
	makesubkey(key);
	decipher1(fpm, fpc);
	fclose(fpc);
	
	AfxMessageBox("Completed!");
	
}

void decipher1(FILE *m, FILE *c)
{
	int i = 0;
	int t = 0;
	int ch = 0;
	int signal = 1;
	int *r = new int[32];
	int left[2][32] ;
	int right[2][32] ;
	int *temp = new int[64];
	int *work = new int[64];
	int *cbc = new int[64];
	int *cbc1 = new int[64];
	cbc = IV;
	while(signal)
	{
		for(i = 0; i < 64; i ++)
			cbc1[i] = cbc[i];//
//		for(i = 0; i < 64; i ++)
//			printf("%d", cbc1[i]);
//		printf("\n");

		if((ch = fgetc(m)) == EOF)
			return;
		work[0] = ch - '0';
//		fgetc(m);
		for(i = 1; i < 64; i ++)
			if((ch = fgetc(m)) == EOF)
			{
				for(; i < 64; i ++)
					work[i] = 0;
				signal = 0;
				break;
			}
			else
			{
				work[i] = ch - '0';
			}
		for(i = 0; i < 64; i ++)
			cbc[i] = work[i];
//		for(i = 0; i < 64; i ++)
//			printf("%d", cbc[i]);
//		printf("\n");
//      ip 置换
		for(i = 0; i < 64; i ++)
		{
			temp[i] = work[IP[i]];
		}
//      轮函数
		for(i = 0; i < 32; i ++)
		{
			left[0][i] = temp[i];
			right[0][i] = temp[i + 32];
		}
		for(t = 0; t < 4; t ++)
		{
			r = left[t % 2];
			r = F(r, subkey[3 - t]);
			for(i = 0; i < 32; i ++)
			{
				right[(t + 1)%2][i] = left[t%2][i];
				left[(t + 1)%2][i] = (right[t%2][i] + r[i]) %2;

			}
		}
		for(i = 0; i < 32; i ++)
		{
			temp[i] = left[0][i];
			temp[i + 32] = right[0][i];
		}
//		ip逆置换
		for(i = 0; i < 64; i ++)
		{
			work[i] = (temp[IPN[i]] + cbc1[i]) % 2 + '0';//
			fputc(work[i], c);
		}
	}
}

void CDesDlg::cancel() 
{
	exit(0);	
}

void error()
{
	AfxMessageBox("ERROR!");
//	exit(0);
}