// KeyGenDlg.cpp : implementation file
//

extern "C"
{
#include "miracl.h"
#include "mirdef.h"
}

#pragma comment( lib, "ms32.lib" ) 


#include "stdafx.h"
#include "KeyGen.h"
#include "KeyGenDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CKeyGenDlg dialog

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

void CKeyGenDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CKeyGenDlg)
	DDX_Control(pDX, IDC_SN, m_sn);
	DDX_Control(pDX, IDC_NAME, m_name);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CKeyGenDlg, CDialog)
//{{AFX_MSG_MAP(CKeyGenDlg)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_BN_CLICKED(IDC_GEN, OnGen)
ON_BN_CLICKED(IDC_ABOUT, OnAbout)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CKeyGenDlg message handlers

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

void CKeyGenDlg::OnGen() 
{
	// TODO: Add your control notification handler code here

/*	KeyGen 1.0 版
 *	版權所有 (C) 2004 趙春生
 *	2004.04.25
 *	http://timw.yeah.net
 *	http://timw.126.com
 *	本程序調用Miracl ver 4.82大數運算庫，詳見其附帶手冊。
 */

//////////////////////////////////////////////////////////////////////////
	
	//P(HEX)=E34436F5F48A227B
	//Q(HEX)=A92FA24467C4E3E3
	//N(HEX)=963251DC5A9C90D9F203A03C363BA411
	//D(HEX)=56157D29A89D77BF2F669A8F0B123CC9
	//E(HEX)=10001
	//Keysize(Bits)=128
	
	UpdateData(TRUE);
	
	int namelen=m_name.GetWindowTextLength ();	//獲取Name的長度
	
	//務必滿足：Name的長度<=(Keysize/8)，使M<N成立。
	if (namelen!=0&&namelen<=16)	//如果不為空且<=128/8則開始計算SN
	{
		miracl *mip=mirsys(100,0);
		mip->IOBASE=16;	//16進制模式
		
		//定義并初始化變量
		big m=mirvar(0);	//m 放明文：注冊碼SN
		big c=mirvar(0);	//c 放密文：用戶名Name
		big n=mirvar(0);	//n 模數
		big d=mirvar(0);	//d 私鑰
		TCHAR Name[256]={0};
		TCHAR SN[256]={0};
		
		m_name.GetWindowText (Name,namelen+1);			//獲取Name
		bytes_to_big(namelen,Name,c);					//轉換成16進制
		//cinstr(n,"963251DC5A9C90D9F203A03C363BA411");	//初始化模數n	 
		//cinstr(d,"56157D29A89D77BF2F669A8F0B123CC9");	//初始化私鑰d
		cinstr(n,"E49465FB02D7C331D9E0BC219D8EA739");	//初始化模數n	 
		cinstr(d,"E319B37B92DE9C0AC03EC2093C4D439B");	//初始化私鑰d
		powmod(c,d,n,m);								//計算m=c^d mod n
		cotstr(m,SN);									//將m以16進制串寫入SN
		m_sn.SetWindowText (SN);						//輸出16進制SN

		//釋放內存
		mirkill(m);
		mirkill(c);
		mirkill(n);
		mirkill(d);
		mirexit();
	}
	else
		m_sn.SetWindowText ("Error: Invalid registration name.");
	
	
	UpdateData(FALSE);
}

void CKeyGenDlg::OnOK() 
{
	// TODO: Add extra validation here
	
	CDialog::OnOK();
}

void CKeyGenDlg::OnAbout() 
{
	// TODO: Add your control notification handler code here
	
	CAboutDlg dlg;
	dlg.DoModal ();
}