demodlg.cpp

RSA加密算法的实现 。它是第一个既能用于数据加密 也能用于数字签名的算法。它易于理解和操作

#include "stdafx.h"
#include "RsaKit.h"
#include "DemoDlg.h"

CDemoDlg::CDemoDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CDemoDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CDemoDlg)
	m_D = _T("");
	m_E = _T("");
	m_N = _T("");
	m_IN = _T("");
	m_OUT = _T("");
	m_Len = 0;
	ready = 0;
	m_time = _T("");
	//}}AFX_DATA_INIT
	CTime t = CTime::GetCurrentTime();
    seed=t.GetSecond();
	srand(seed);
}

void CDemoDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CDemoDlg)
	DDX_Text(pDX, IDC_D, m_D);
	DDX_Text(pDX, IDC_E, m_E);
	DDX_Text(pDX, IDC_N, m_N);
	DDX_Text(pDX, IDC_INPUT, m_IN);
	DDX_Text(pDX, IDC_OUTPUT, m_OUT);
	DDX_CBIndex(pDX, IDC_COMBO, m_Len);
	DDX_Text(pDX, IDC_time, m_time);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CDemoDlg, CDialog)
	//{{AFX_MSG_MAP(CDemoDlg)
	ON_BN_CLICKED(IDC_BUTTON_GET, OnButtonGet)
	ON_BN_CLICKED(IDC_BUTTON_PUT, OnButtonPut)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

BEGIN_EVENTSINK_MAP(CDemoDlg, CDialog)
    //{{AFX_EVENTSINK_MAP(CDemoDlg)
	ON_EVENT(CDemoDlg, IDC_DECRYPT, -600 /* Click */, OnClickDecrypt, VTS_NONE)
	ON_EVENT(CDemoDlg, IDC_ENCRYPT, -600 /* Click */, OnClickEncrypt, VTS_NONE)
	//}}AFX_EVENTSINK_MAP
END_EVENTSINK_MAP()

void CDemoDlg::OnButtonPut() 
{
	UpdateData(TRUE);
	ready=0;
	if(m_N.GetLength()>256)
	{
		AfxMessageBox("N不得大于256位");
		return;
	}
	if(m_E.GetLength()>256)
	{
		AfxMessageBox("E不得大于256位");
		return;
	}
    if(m_D.GetLength()>10)
	{
		AfxMessageBox("D不得大于10位");
	    return;
	}
	for(int i=0;i<m_N.GetLength();i++)
	{
		if((m_N[i]<'0')||
		   ((m_N[i]>'9')&&(m_N[i]<'A'))||
		   ((m_N[i]>'F')&&(m_N[i]<'a'))||
		   (m_N[i]>'f'))
		{
	    	AfxMessageBox("N必须为0-9或A-F或a-f组成的整数");
			return;
		}
	}
	for(i=0;i<m_E.GetLength();i++)
	{
		if((m_E[i]<'0')||
		   ((m_E[i]>'9')&&(m_E[i]<'A'))||
		   ((m_E[i]>'F')&&(m_E[i]<'a'))||
		   (m_E[i]>'f'))
		{
		    AfxMessageBox("E必须为0-9或A-F或a-f组成的整数");
			return;
		}
	}
	for(i=0;i<m_D.GetLength();i++)
	{
		if((m_D[i]<'0')||
		   ((m_D[i]>'9')&&(m_D[i]<'A'))||
		   ((m_D[i]>'F')&&(m_D[i]<'a'))||
		   (m_D[i]>'f'))
		{
			AfxMessageBox("D必须为0-9或A-F或a-f组成的整数");
			return;
		}
	}
	N.Get(m_N);
	D.Get(m_D);
	E.Get(m_E);
	if((N.Cmp(E)<=0)||(N.Cmp(D)<=0))
	{
		AfxMessageBox("N必须大于D、E");
		return;
	}
	ready=1;
	Q.m_ulValue[0]=0;
}

void CDemoDlg::OnButtonGet() 
{
	ready=1;
	UpdateData(TRUE);
	int len=2;
	for(int i=0;i<m_Len;i++)
	{
		len*=2;
	}
    DWORD dwStart = GetTickCount();
	P.Mov(0);
	Q.Mov(0);
	N.Mov(0);
	E.Mov(0);
	P.GetPrime(len);
	Q.GetPrime(len);
	N.Mov(P.Mul(Q));
	N.Put(m_N);
	P.m_ulValue[0]--;
	Q.m_ulValue[0]--;
	P.Mov(P.Mul(Q));
	D.Mov(0x10001);
	m_D="10001";
	E.Mov(D.Euc(P));
	E.Put(m_E);
    DWORD dwEnd = GetTickCount();
    DWORD dw = dwEnd - dwStart;
	double time = dw;
	m_time.Format("%.4f",time/1000);
	m_time+=" 秒";
    UpdateData(FALSE);
	UpdateData(FALSE);
}

void CDemoDlg::OnClickEncrypt() 
{
	if(ready==0)
	{
		AfxMessageBox("请先输入或生成N、D、E");
        return;
	}
	UpdateData(TRUE);
    if(m_IN.GetLength()>256)
	{
	    AfxMessageBox("N不得大于256位");
	    return;
	}
	for(int i=0;i<m_IN.GetLength();i++)
	{
		if((m_IN[i]<'0')||
		   ((m_IN[i]>'9')&&(m_IN[i]<'A'))||
		   ((m_IN[i]>'F')&&(m_IN[i]<'a'))||
		   (m_IN[i]>'f'))
		{
			AfxMessageBox("待加密数据必须为0-9或A-F或a-f组成的整数");
			return;
		}
	}
	P.Get(m_IN);
	if(P.Cmp(N)>=0)
	{
		AfxMessageBox("待加密数据必须小于N");
        return;
	}
	Q.Mov(P.RsaTrans(E,N));
	Q.Put(m_OUT);
	UpdateData(FALSE);
}

void CDemoDlg::OnClickDecrypt() 
{
	if((ready==0)||(Q.m_ulValue[0]==0))
	{
		AfxMessageBox("请先进行加密");
        return;
	}
	Q.Get(m_OUT);
	P.Mov(Q.RsaTrans(D,N));
	P.Put(m_OUT);
	UpdateData(FALSE);
}