rsaencrpdlg.cpp

rsa的c++实现,此程序实现使用公钥的加密

// RSAencrpDlg.cpp : implementation file
//

#include "stdafx.h"
#include "RSAencrp.h"
#include "RSAencrpDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CRSAencrpDlg dialog

CRSAencrpDlg::CRSAencrpDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CRSAencrpDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CRSAencrpDlg)
	m_loadpubkey = _T("");
	m_loadplaintext = _T("");
	m_cipherpath = _T("");
	KEYLENGTH = 1024;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CRSAencrpDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CRSAencrpDlg)
	DDX_Text(pDX, IDC_EDIT1, m_loadpubkey);
	DDX_Text(pDX, IDC_EDIT3, m_loadplaintext);
	DDX_Text(pDX, IDC_EDIT4, m_cipherpath);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CRSAencrpDlg, CDialog)
	//{{AFX_MSG_MAP(CRSAencrpDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_LoadKey, OnLoadKey)
	ON_BN_CLICKED(IDC_LoadPlaint, OnLoadPlaint)
	ON_BN_CLICKED(IDC_LoadPlaint2, OnLoadPlaint2)
	ON_BN_CLICKED(IDC_DoCrypt, OnDoCrypt)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CRSAencrpDlg message handlers

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

void CRSAencrpDlg::OnLoadKey() 
{
	// TODO: Add your control notification handler code here
	UpdateData();
	CFileDialog fileDlg(TRUE);
 	fileDlg.m_ofn.lpstrTitle="导入公钥";
 	fileDlg.m_ofn.lpstrFilter="Pub Files(*.txt)\0*.txt\0\0\0";
 	fileDlg.m_ofn.lpstrDefExt="txt";
 	if(IDOK==fileDlg.DoModal())
 	{
		m_loadpubkey = fileDlg.GetPathName();
	}


	UpdateData(false);	
}

void CRSAencrpDlg::OnLoadPlaint() 
{
	// TODO: Add your control notification handler code here
	UpdateData();
	CFileDialog fileDlg(TRUE);
 	fileDlg.m_ofn.lpstrTitle="导入明文";
 	fileDlg.m_ofn.lpstrFilter="Pub Files(*.txt)\0*.txt\0\0\0";
 	fileDlg.m_ofn.lpstrDefExt="txt";
 	if(IDOK==fileDlg.DoModal())
 	{
		m_loadplaintext = fileDlg.GetPathName();
	}
	UpdateData(false);
}

void CRSAencrpDlg::OnLoadPlaint2() 
{
	// TODO: Add your control notification handler code here
	UpdateData();
	CFileDialog fileDlg(false);
 	fileDlg.m_ofn.lpstrTitle="保存密文";
 	fileDlg.m_ofn.lpstrFilter="txt Files(*.txt)\0*.txt\0\0\0";
 	fileDlg.m_ofn.lpstrDefExt="txt";
	if(IDOK==fileDlg.DoModal())
	{
		m_cipherpath = fileDlg.GetPathName();
	}
	UpdateData(false);
}

void CRSAencrpDlg::OnDoCrypt() 
{
	// TODO: Add your control notification handler code here
	UpdateData();

			if(m_cipherpath.IsEmpty() || m_loadplaintext.IsEmpty() || m_loadpubkey.IsEmpty())
	{
		MessageBox("请输入路径");
		return;
	}
	RSAkey prvkey(KEYLENGTH);

		
		//导入公钥
		fstream fout2 (m_loadpubkey,ios::in | ios::binary);
		CString pBuf("");
		int pos; 
		while(!fout2.eof())
		{
			fout2.read(pBuf.GetBuffer(0),5);
			if(memcmp(pBuf, "PUBK|", 5) == 0)
				{
					pos = fout2.tellg();
					break;
				}
			pBuf.ReleaseBuffer(0);
			fout2.seekg(-4, ios::cur);
		}
		if(fout2.eof())
		{
			MessageBox("公钥格式错误");
			return ;
		}

		char* pubklen1 = new char[4];
		char* pubklen2 = new char[4];
		memset(pubklen1, 0, 4);
		memset(pubklen2, 0, 4);
		int count1 = 0;
		int count2 = 0;
		fout2.read(pubklen1, 3);
		fout2.read(pubklen2, 3);
		count1 = atoi(pubklen1);
		count2 = atoi(pubklen2);
		char* pubkp = new char [count1+1];
		char* pubkm = new char [count2+1];
		memset(pubkp, 0, count1);
		memset(pubkm, 0, count2);
		fout2.read(pubkp, count1);
		fout2.read(pubkm, count2);
		LINT p = LINT(pubkp, 16);
		LINT mod = LINT(pubkm, 16);
		PKEYSTRUCT key;
		key.mod = mod;
		key.pubexp = p;
		key.bitlen_mod = ld (key.mod);
		key.bytelen_mod = key.bitlen_mod >> 3;
		if ((key.bitlen_mod % 8) > 0)
		{
		++key.bytelen_mod;
		}
		RSApub pubkey(key);
		delete []pubklen1;
		delete []pubklen2;
		delete []pubkp;
		delete []pubkm;
 		fout2.close ();

		//导入明文
		CFile fp(m_loadplaintext, CFile::modeRead);
		DWORD dw_length;
		dw_length = fp.GetLength();
		deskey = new char [dw_length+1];
		memset(deskey, 0, dw_length+1);
		fp.Read(deskey, dw_length);
		fp.Close();
	
	
	//加密
	
	    fstream fout1 (m_cipherpath,ios::out | ios::binary);
		CString char_flag("CIPH|");
		fout1.write(char_flag, char_flag.GetLength());
	    int LenEncryptionBlock = pubkey.keyvalue().bytelen_mod - 12; 
		////分组的长度最大为为mod-1-2-8
        UCHAR* EncryptionBlock = new UCHAR[LenEncryptionBlock];
		int round = dw_length/LenEncryptionBlock;
		if( dw_length % LenEncryptionBlock != 0)
			round++;
		for( int i = 0; i < round; i++ )
		{
		memcpy(EncryptionBlock, deskey + i*LenEncryptionBlock, LenEncryptionBlock);
		LINT CIPHER = pubkey.crypt(EncryptionBlock, LenEncryptionBlock);
		CString m_lint2str(CIPHER.lint2str(16));
		int count = m_lint2str.GetLength();
		CString char_count("");
		char_count.Format("%d", count);
		fout1.write(char_count, char_count.GetLength());
		fout1.write(m_lint2str, m_lint2str.GetLength());
		}
		MessageBox("加密成功");

//	fout1 << cipher;
/*	long	count =  strlen(cipher.lint2str(16)) ;
	CString countlength("");
	char* flag = "CIPH|";
	countlength.Format("%s", flag);
	CString countlength1("");
	countlength1.Format("%d", count);
	MessageBox(countlength);///////////
	MessageBox(countlength1);///////////
  /////////////////////
	fout1.write(countlength, countlength.GetLength());
	fout1.write(countlength1, countlength1.GetLength());
	char aaa = '|';
	fout1.write(&aaa, 1);
//	fout1.write(cipher_mess, cipher_mess.GetLength());
	fout1.write(stringcipher, count);
	fout1.close ();
	delete []deskey;
	MessageBox("加密成功");*/
	UpdateData(false);
}