// RSA算法示例Dlg.cpp : implementation file
//

#include "stdafx.h"
#include "RSA算法示例.h"
#include "RSA算法示例Dlg.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()

/////////////////////////////////////////////////////////////////////////////
// CRSADlg dialog

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

void CRSADlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CRSADlg)
	DDX_Control(pDX, IDC_COMBOBOX_Q, m_ComboBox2);
	DDX_Control(pDX, IDC_COMBOBOX_P, m_ComboBox1);
	DDX_Text(pDX, IDC_EDIT_N, m_n);
	DDX_Text(pDX, IDC_EDIT_PK, m_pk);
	DDX_Text(pDX, IDC_EDIT_SK, m_sk);
	DDX_Text(pDX, IDC_EDIT_TXT, m_txt);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CRSADlg, CDialog)
	//{{AFX_MSG_MAP(CRSADlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON_DEC, OnButtonDec)
	ON_BN_CLICKED(IDC_BUTTON_ENC, OnButtonEnc)
	ON_BN_CLICKED(IDC_BUTTON_GENK, OnButtonGenk)
	ON_BN_CLICKED(IDC_BUTBEN, OnButben)
	ON_BN_CLICKED(IDC_BUTCLEAR, OnButclear)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CRSADlg message handlers

BOOL CRSADlg::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
	
	//memset(dpk,-1,sizeof(dpk));
	for(i=0;i<16;i++)
	  dpk[i]=-1;
	ii=0;
	return TRUE;  // return TRUE  unless you set the focus to a control
}

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

void CRSADlg::OnButtonDec()    //解密 
{
	// TODO: Add your control notification handler code here

	int j,c=0,d=1;
    int temp,bitlen;
     temp=dd;
    
    bitlen=d2b(temp);
    for (j=0;j<bitlen;j++)
	{
        c=2*c;
           d=(d*d) % n ;
           if(dpk[j]==1)
		   {
            c=c+1;
             d=(d*ct2) %n;
   }
  }

	cl.Format("%d",d);
  SetDlgItemText(IDC_EDIT_PT2,cl);
}

void CRSADlg::OnButtonEnc()   //加密
{
	// TODO: Add your control notification handler code here
	GetDlgItemText(IDC_EDIT_PT1,str4);//要加密的明文
	pt1=atoi(str4);
 
	int j,c=0,d=1;
    int temp,bitlen;
     temp=e;
    
    bitlen=d2b(temp);
    for (j=0;j<bitlen;j++)
	{
        c=2*c;
           d=(d*d) % n ;
           if(dpk[j]==1)
		   {
            c=c+1;
             d=(d*pt1) %n;
   }
  }

	dl.Format("%d",d);
  SetDlgItemText(IDC_EDIT_CT1,dl);
    SetDlgItemText(IDC_EDIT_CT2,dl);
	ct2=atoi(dl);
	for(i=0;i<16;i++)
	  dpk[i]=-1;
	ii=0;


}

   
int  CRSADlg::d2b(int d)
{  
int i;
  if(d==0) return -1;
  else
  {
  d2b(d/2);
  dpk[ii++]=0+d%2;
  }
 
for (i=0;i<16;i++)
   if(dpk[i]==-1) return i;
} 


void CRSADlg::OnButtonGenk() 
{
  
    int nSel1=m_ComboBox1.GetCurSel(); 
    m_ComboBox1.GetLBText(nSel1,str1);
    p=atoi(str1);
    int nSel2=m_ComboBox2.GetCurSel(); 
    m_ComboBox2.GetLBText(nSel2,str2);
    q=atoi(str2);
    GetDlgItemText(IDC_EDIT_E,str3);//選擇的素數e
	e=atoi(str3);
	m=(p-1)*(q-1);     ////////======秘密計算的m==========//////   
	n=p*q;              ///====計算可以公開的n=========//////   
  
    for(i=1;i<m;i++)                     /////======for循環算出a============////   
       if(i*e%m==1)  
		   break; 
	if(e>=m) 
	{m_n.Format("e 必須小于 m，請重新開始");

	m_sk.Format("");
	m_pk.Format("");
	GetDlgItemText(IDC_EDIT_E,str3);//選擇的素數e
	e=atoi(str3);
	}
	else if (i==m)
	{m_n.Format("e輸入錯誤！請重新開始");

	m_sk.Format("");
	m_pk.Format("");
	GetDlgItemText(IDC_EDIT_E,str3);//選擇的素數e
	e=atoi(str3);
	}
	
	 else
	 {	 
	  dd=i;
      m_n.Format("n=pq=%d",n);
      m_pk.Format("公鑰為{e,n}={%d,%d}",e,n);
      m_sk.Format("私鑰為{d,n}={%d,%d}",dd,n);
	 }
       UpdateData(FALSE);
}

void CRSADlg::OnButben() 
{ 
m_txt="1.選擇2個保密的大素數p和q.\r\n2.計算n=pq和歐拉函數m=(p-1)(q-1).\r\n3.選一整數e,且滿足1<e<m和gcd(m,e)=1.\r\n4.計算d,且滿足de=1 mod m.\r\n5.公鑰為{e,n},私鑰為{d,n}.\r\n";
	UpdateData(FALSE);	

}

void CRSADlg::OnButclear() 
{
	// TODO: Add your control notification handler code here


	for(i=0;i<16;i++)
	  dpk[i]=-1;
	ii=0;
	SetDlgItemText(IDC_COMBOBOX_P,"");
	  SetDlgItemText(IDC_COMBOBOX_Q,"");
	  SetDlgItemText(IDC_EDIT_E,"");
	  SetDlgItemText(IDC_EDIT_PK,"");
   SetDlgItemText(IDC_EDIT_N,"");
   SetDlgItemText(IDC_EDIT_SK,"");
   SetDlgItemText(IDC_EDIT_PT1,"");
   SetDlgItemText(IDC_EDIT_PT2,"");
   SetDlgItemText(IDC_EDIT_CT1,"");
   SetDlgItemText(IDC_EDIT_CT2,"");
	
}