eccdlg.cpp

ECC加密的源码希望对你们有所帮助值得一看

// ECCDlg.cpp : implementation file
//

#include "stdafx.h"
#include "ECC.h"
#include "ECCDlg.h"
#include"tommath.h"
#include"tommath_class.h"
#include"tommath_superclass.h"
#include"iostream.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#define P_LONG 200
#define KEY_LONG 128
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif


/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About
//****************************************************************
	mp_int GX;
	mp_int GY;
	mp_int K;//私有密钥
	mp_int A;
	mp_int B;
	mp_int QX;
	mp_int QY;
	mp_int P;//Fp中的p(有限域P)
	
	mp_init(&GX);
	mp_init(&GY);
	mp_init(&K);
	mp_init(&A);
	mp_init(&B);
	mp_init(&QX);
	mp_init(&QY);
	mp_init(&P);

    time_t t;           
    srand( (unsigned) time( &t ) );
 
	Ecc_encipher(&QX,&QY,&GX,&GY,&A,&P);//加密

	Ecc_decipher(&K,&A,&P);//解密


	char cc;
    cout<<"\n\n请击一键退出!\n";
	cin>>cc;

	mp_clear(&GX);
	mp_clear(&GY);
	mp_clear(&K);//私有密钥
	mp_clear(&A);
	mp_clear(&B);
	mp_clear(&QX);
	mp_clear(&QY);
	mp_clear(&P);//Fp中的p(有限域P)


//*******************************************************************
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()
};

int myrng(unsigned char *dst, int len, void *dat)
{
   int x;
   for (x = 0; x < len; x++) dst[x] = rand() & 0xFF;
   return len;
}
int GetPrime(mp_int *m,int lon){
   mp_prime_random_ex(m, 10, lon, 
		(rand()&1)?LTM_PRIME_2MSB_OFF:LTM_PRIME_2MSB_ON,myrng, NULL);
   return MP_OKAY;
}

int Two_points_add(mp_int *x1,mp_int *y1,mp_int *x2,mp_int *y2,mp_int *x3,mp_int *y3,mp_int *a,bool zero,mp_int *p)
{
mp_int x2x1;
mp_int y2y1;
mp_int tempk;
mp_int tempy;
mp_int tempzero;
mp_int k;
mp_int temp1;
mp_int temp2;
mp_int temp3;
mp_int temp4;
mp_int temp5;
mp_int temp6;
mp_int temp7;
mp_int temp8;
mp_int temp9;
mp_int temp10;


mp_init(&x2x1);
mp_init(&y2y1);
mp_init(&tempk);
mp_init(&tempy);
mp_init(&tempzero);
mp_init(&k);
mp_init(&temp1);
mp_init(&temp2);
mp_init_set(&temp3,2);
mp_init(&temp4);
mp_init(&temp5);
mp_init(&temp6);
mp_init(&temp7);
mp_init(&temp8);
mp_init(&temp9);
mp_init(&temp10);


   if(zero)
   {
	  mp_copy(x1, x3);
      mp_copy(y1, y3);
	  zero=false;
	  goto L;
   }
   mp_zero(&tempzero);
   mp_sub(x2, x1, &x2x1);
   if(mp_cmp(&x2x1,&tempzero)==-1)
   {
	  
	  mp_add(&x2x1, p, &temp1);
	  mp_zero(&x2x1);
      mp_copy(&temp1, &x2x1);
   }
   mp_sub(y2, y1, &y2y1);
   if(mp_cmp(&y2y1,&tempzero)==-1)
   {
     
	  mp_add(&y2y1, p, &temp2);
	  mp_zero(&y2y1);
      mp_copy(&temp2, &y2y1);
   }
   if(mp_cmp(&x2x1, &tempzero)!=0)
   {
	   
	   mp_invmod(&x2x1,p,&tempk);
	   
	   mp_mulmod(&y2y1, &tempk, p, &k);
   }
   else
   {
	   if(mp_cmp(&y2y1, &tempzero)==0)
	   {
		  
		  mp_mulmod(&temp3,y1,p,&tempy);
          mp_invmod(&tempy,p,&tempk);
          mp_sqr(x1, &temp4);     
		  mp_mul_d(&temp4, 3, &temp5);
		  mp_add(&temp5, a, &temp6);
          mp_mulmod(&temp6, &tempk, p, &k);
		  
	   }
	   else
	   {
		  zero=true;
		  goto L;
	   }
   }  
 
   mp_sqr(&k, &temp7);
   mp_sub(&temp7, x1, &temp8);
   mp_submod(&temp8, x2, p, x3);
 
   mp_sub(x1, x3, &temp9);
   mp_mul(&temp9, &k, &temp10);
   mp_submod(&temp10, y1, p, y3);


L:

   mp_clear(&x2x1);
   mp_clear(&y2y1);
   mp_clear(&tempk);
   mp_clear(&tempy);
   mp_clear(&tempzero);
   mp_clear(&k);
   mp_clear(&temp1);
   mp_clear(&temp2);
   mp_clear(&temp3);
   mp_clear(&temp4);
   mp_clear(&temp5);
   mp_clear(&temp6);
   mp_clear(&temp7);
   mp_clear(&temp8);
   mp_clear(&temp9);
   mp_clear(&temp10);

   return 1;

}
bool Ecc_points_mul(mp_int *qx,mp_int *qy, mp_int *px, mp_int *py,mp_int *d,mp_int *a,mp_int *p)
{
mp_int X1, Y1;
mp_int X2, Y2;
mp_int X3, Y3;
mp_int XX1, YY1;
mp_int A,P;

int i;
bool zero=false;
char Bt_array[800]={0};
char cm='1';

    mp_toradix(d,Bt_array,2); 

    mp_init_set_int(&X3, 0);
    mp_init_set_int(&Y3, 0);
	mp_init_copy(&X1, px);
	mp_init_copy(&X2, px);
    mp_init_copy(&XX1, px);
	mp_init_copy(&Y1, py);
	mp_init_copy(&Y2, py);
	mp_init_copy(&YY1, py);

	mp_init_copy(&A, a);
	mp_init_copy(&P, p);

	for(i=1;i<=KEY_LONG-1;i++)
	{
	   mp_copy(&X2, &X1);
	   mp_copy(&Y2, &Y1);
	   Two_points_add(&X1,&Y1,&X2,&Y2,&X3,&Y3,&A,zero,&P);  
       mp_copy(&X3, &X2);
	   mp_copy(&Y3, &Y2);
	   if(Bt_array[i]==cm)
	   {
		  
		   mp_copy(&XX1, &X1);
		   mp_copy(&YY1, &Y1);
		   Two_points_add(&X1,&Y1,&X2,&Y2,&X3,&Y3,&A,zero,&P);
		   mp_copy(&X3, &X2);
		   mp_copy(&Y3, &Y2);

	   }

	}
		
   if(zero)
   {
	   cout<<"It is Zero_Unit!";
       return false;//如果Q为零从新产生D
   }

   mp_copy(&X3, qx);
   mp_copy(&Y3, qy);

   mp_clear(&X1);
   mp_clear(&Y1);
   mp_clear(&X2);
   mp_clear(&Y2);
   mp_clear(&X3);
   mp_clear(&Y3);
   mp_clear(&XX1);
   mp_clear(&YY1);
   mp_clear(&A);
   mp_clear(&P);
  
   return true;
}

void Get_B_X_Y(mp_int *x1,mp_int *y1,mp_int *b, mp_int *a, mp_int *p)
{
    mp_int tempx,tempy;
    mp_int temp;
	mp_int compare;
	mp_int temp1;
	mp_int temp2;
	mp_int temp3;
	mp_int temp4;
	mp_int temp5;
	mp_int temp6;
	mp_int temp7;
	mp_int temp8;
    
	mp_init_set_int (&compare, 0);
	mp_init(&tempx);
	mp_init(&tempy);
	mp_init(&temp);
    mp_init(&temp1);
	mp_init(&temp2);
	mp_init(&temp3);
	mp_init(&temp4);
	mp_init(&temp5);
	mp_init(&temp6);
	mp_init(&temp7);
	mp_init(&temp8);

 
   while(1)
   {
     
	 //4a3+27b2≠0 (mod p)
     GetPrime(b,40);
	 mp_expt_d(a, 3, &temp1);
     mp_sqr(b, &temp2);
	 mp_mul_d(&temp1, 4, &temp3);
	 mp_mul_d(&temp2, 27, &temp4);
     mp_add(&temp3, &temp4, &temp5);
	 mp_mod(&temp5,p,&temp);

     if(mp_cmp(&temp, &compare)!=0 )
	 {
		 break;
	 }
   }

   //y2=x3+ax+b,随机产生X坐标,根据X坐标计算Y坐标
   GetPrime(x1,30);
   mp_expt_d(x1, 3, &temp6);
   mp_mul(a, x1, &temp7);
   mp_add(&temp6, &temp7, &temp8);
   mp_add(&temp8, b, &tempx);
   mp_sqrt(&tempx, y1);



   mp_clear(&tempx);
   mp_clear(&tempy);
   mp_clear(&temp);
   mp_clear(&temp1);
   mp_clear(&temp2);
   mp_clear(&temp3);
   mp_clear(&temp4);
   mp_clear(&temp5);
   mp_clear(&temp6);
   mp_clear(&temp7);
   mp_clear(&temp8);


}
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()

/////////////////////////////////////////////////////////////////////////////
// CECCDlg dialog

CECCDlg::CECCDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CECCDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CECCDlg)
	m_canshu = _T("");
	m_scjm = _T("");
	m_scjmwj = _T("");
	m_srjm = _T("");
	m_srjmwj = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CECCDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CECCDlg)
	DDX_Control(pDX, IDjiem, m_jiem);
	DDX_Control(pDX, IDjiam, m_jiam);
	DDX_Text(pDX, IDC_canshu, m_canshu);
	DDX_Text(pDX, IDC_scjm, m_scjm);
	DDX_Text(pDX, IDC_scjmwj, m_scjmwj);
	DDX_Text(pDX, IDC_srjm, m_srjm);
	DDX_Text(pDX, IDC_srjmwj, m_srjmwj);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CECCDlg, CDialog)
	//{{AFX_MSG_MAP(CECCDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_EN_CHANGE(IDC_canshu, OnChangecanshu)
	ON_EN_CHANGE(IDC_srjm, OnChangesrjm)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CECCDlg message handlers

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

void CECCDlg::OnChangecanshu() 
{
 UpdateData(TRUE);

	GetPrime(&P,P_LONG);
	char temp[800]="";
    mp_toradix(&P,temp,10); 

	GetPrime(&A,30);
	char tempA[800]={0};
    mp_toradix(&A,tempA,10);

	Get_B_X_Y(&GX,&GY,&B,&A,&P);

    char tempB[800]={0};
    mp_toradix(&B,tempB,10);

	char tempGX[800]={0};
    mp_toradix(&GX,tempGX,10);

	char tempGY[800]={0};
    mp_toradix(&GY,tempGY,10);

	GetPrime(&K,KEY_LONG);
    char tempK[800]={0};
    mp_toradix(&K,tempK,10);

	Ecc_points_mul(&QX,&QY,&GX,&GY,&K,&A,&P);
	

    char tempQX[800]={0};
    mp_toradix(&QX,tempQX,10);

	char tempQY[800]={0};
    mp_toradix(&QY,tempQY,10);
	m_canshu="椭圆曲线的参数如下(以十进制显示):";
	m_canshu+="\r\n有限域  P: ";
	m_canshu+=temp;
	m_canshu+="\r\n曲线参数 A: ";
    m_canshu+=tempA;
	m_canshu+="\r\n曲线参数 B: ";
	m_canshu+=tempB;
	m_canshu+="\n曲线G点X坐标: ";
	m_canshu+=tempGX;
	m_canshu+="\n曲线G点Y坐标: ";
	m_canshu+=tempGY;
	m_canshu+="\n私钥 K: ";
	m_canshu+=tempK;
	m_canshu+="\n公钥X坐标: ";
	m_canshu+=tempQX;
	m_canshu+="\n公钥Y坐标: ";
	m_canshu+=tempQY;
	m_canshu+="\n\n";
	UpdateData(FALSE);


	// TODO: If this is a RICHEDIT control, the control will not
	// send this notification unless you override the CDialog::OnInitDialog()
	// function and call CRichEditCtrl().SetEventMask()
	// with the ENM_CHANGE flag ORed into the mask.
	
	// TODO: Add your control notification handler code here
	
}

void CECCDlg::OnChangesrjm() 
{
	// TODO: If this is a RICHEDIT control, the control will not
	// send this notification unless you override the CDialog::OnInitDialog()
	// function and call CRichEditCtrl().SetEventMask()
	// with the ENM_CHANGE flag ORed into the mask.
	
	// TODO: Add your control notification handler code here
	
}