通过调用dll实现加密运算---工程项目Fob Signup

因为客户需要对本产品的协议保密不公开，所以往往会将自己的机密算法通过dll打包，只为开发团队提供一个接口。

这样就可以避免开发人员公开自己的机密算法。

以下举例，作为开发团队，如何通过客户的dll包实现产品加密算法：

// FobsignupDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Fobsignup.h"
#include "FobsignupDlg.h"
#include "afxdialogex.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif
typedef int(*PFUN)(const unsigned int        fobIdLen
    , const unsigned int        maxPepArrayLen
    , const unsigned int        maxRkeArrayLen
    , const unsigned char    *encryptedFobId
    , unsigned int            *actualPepArrayLen
    , unsigned int            *actualRkeArrayLen
    , unsigned char            *dtEncryptedPepArray
    , unsigned char            *dtEncryptedRkeArray);

typedef void(*AESFUN)(unsigned char *pskey, unsigned char *blk);
//e.g, input="123456"--(length=6)-->output={0x12,0x34,0x56}
typedef int(*C2HFUN)(char*input, unsigned char *output, int length);

unsigned char dll_key_fob[16] = { 0x56, 0x38, 0x97, 0x3f, 0x56, 0x70, 0x22, 0x88, 0x3b, 0x52, 0xfe, 0x5a, 0x01, 0x32, 0x08, 0x49 };
unsigned char dll_key_PEP[16] = { 0x13, 0xff, 0x13, 0x84, 0x43, 0x86, 0x43, 0x4a, 0x23, 0x53, 0xe6, 0x54, 0xd3, 0x02, 0x00, 0x34 };
unsigned char dll_key_RKE[16] = { 0x15, 0x42, 0x71, 0x73, 0x6a, 0x41, 0xe3, 0x45, 0xde, 0x40, 0xba, 0x34, 0x42, 0x82, 0xaa, 0xe2 };

unsigned char bcm_key_PEP[16] = { 0x18, 0x92, 0x14, 0x81, 0x89, 0xf2, 0x4f, 0xa4, 0x92, 0x52, 0xfe, 0x5a, 0x4e, 0x32, 0xcc, 0x3d };
unsigned char bcm_key_RKE[16] = { 0x12, 0x52, 0x63, 0x54, 0x25, 0x4b, 0xc3, 0x4b, 0x23, 0x00, 0xdd, 0xbb, 0xc3, 0x82, 0xfd, 0xf4 };
//CRC-8 for ATM HEC (x8+x2+x+1)
unsigned char cal_crc(unsigned char *vptr, unsigned char len)
{
    const unsigned char *data = vptr;
    unsigned int crc = 0;
    int i, j;
    for (j = len; j; j--, data++)
    {
        crc ^= (*data << 8);
        for (i = 8; i; i--)
        {
            if (crc & 0x8000)
                crc ^= (unsigned int)(0x1070 << 3);
            crc <<= 1;
        }
    }
    return (unsigned char)(crc >> 8);
}
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialogEx
{
public:
    CAboutDlg();

// Dialog Data
    enum { IDD = IDD_ABOUTBOX };

    protected:
    virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support

// Implementation
protected:
    DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialogEx(CAboutDlg::IDD)
{
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
    CDialogEx::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialogEx)
END_MESSAGE_MAP()


// CFobsignupDlg dialog



CFobsignupDlg::CFobsignupDlg(CWnd* pParent /*=NULL*/)
    : CDialogEx(CFobsignupDlg::IDD, pParent)
    , m_Edit1(_T(""))
    , m_Edit2(_T(""))
    , m_Edit3(_T(""))
    , m_Edit4(_T(""))
    , m_Edit5(_T(""))
    , m_Edit6(_T(""))
    , m_Edit7(_T(""))
    , m_Edit8(_T(""))
    , m_Edit9(_T(""))
{
    m_hIcon = AfxGetApp()->LoadIcon(IDI_ICON1); //IDR_MAINFRAME
}

void CFobsignupDlg::DoDataExchange(CDataExchange* pDX)
{
    CDialogEx::DoDataExchange(pDX);
    DDX_Text(pDX, IDC_EDIT1, m_Edit1);
    DDX_Text(pDX, IDC_EDIT2, m_Edit2);
    DDX_Text(pDX, IDC_EDIT3, m_Edit3);
    DDX_Text(pDX, IDC_EDIT4, m_Edit4);
    DDX_Text(pDX, IDC_EDIT5, m_Edit5);
    DDX_Text(pDX, IDC_EDIT6, m_Edit6);
    DDX_Text(pDX, IDC_EDIT7, m_Edit7);
    DDX_Text(pDX, IDC_EDIT8, m_Edit8);
    DDX_Text(pDX, IDC_EDIT9, m_Edit9);
    //  DDX_Control(pDX, IDC_MSCOMM1, m_mscom);
}

BEGIN_MESSAGE_MAP(CFobsignupDlg, CDialogEx)
    ON_WM_SYSCOMMAND()
    ON_WM_PAINT()
    ON_WM_QUERYDRAGICON()
    ON_BN_CLICKED(IDC_BUTTON1, &CFobsignupDlg::create_BN_CLICKED)
    ON_BN_CLICKED(IDC_BUTTON2, &CFobsignupDlg::Clear_BN_CLICKED)
//    ON_BN_CLICKED(IDC_BUTTON3, &CFobsignupDlg::OnBnClickedButton3)
ON_BN_CLICKED(IDC_BUTTON3, &CFobsignupDlg::write_BN_CLICKED)
ON_BN_CLICKED(IDC_BUTTON4, &CFobsignupDlg::Open_Close_BN_CLICKED)
ON_BN_CLICKED(IDC_CHECK1, &CFobsignupDlg::checkBox1_BN_CLICKED)
ON_BN_CLICKED(IDC_CHECK2, &CFobsignupDlg::checkBox2_BN_CLICKED)
ON_BN_CLICKED(IDC_CHECK3, &CFobsignupDlg::checkBox3_BN_CLICKED)
ON_BN_CLICKED(IDC_CHECK4, &CFobsignupDlg::checkBox4_BN_CLICKED)
ON_BN_CLICKED(IDC_CHECK5, &CFobsignupDlg::checkBox5_BN_CLICKED)
ON_BN_CLICKED(IDC_CHECK6, &CFobsignupDlg::checkBox6_BN_CLICKED)
ON_BN_CLICKED(IDC_CHECK7, &CFobsignupDlg::checkBox7_BN_CLICKED)
ON_BN_CLICKED(IDC_CHECK8, &CFobsignupDlg::checkBox8_BN_CLICKED)
END_MESSAGE_MAP()


// CFobsignupDlg message handlers

BOOL CFobsignupDlg::OnInitDialog()
{
    CDialogEx::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)
    {
        BOOL bNameValid;
        CString strAboutMenu;
        bNameValid = strAboutMenu.LoadString(IDS_ABOUTBOX);
        ASSERT(bNameValid);
        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
    CEdit *pEdit = (CEdit*)(this)->GetDlgItem(IDC_EDIT1);
    pEdit->SetLimitText(24);
    CComboBox* pct = (CComboBox *)this->GetDlgItem(IDC_COMBO1);
    CComboBox* pport = (CComboBox *)this->GetDlgItem(IDC_COMBO2);
    CComboBox* pbaud = (CComboBox *)this->GetDlgItem(IDC_COMBO3);
    pct->SetCurSel(0);
    pport->SetCurSel(1);
    pbaud->SetCurSel(2);
    return TRUE;  // return TRUE  unless you set the focus to a control
}

void CFobsignupDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
    if ((nID & 0xFFF0) == IDM_ABOUTBOX)
    {
        CAboutDlg dlgAbout;
        dlgAbout.DoModal();
    }
    else
    {
        CDialogEx::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 CFobsignupDlg::OnPaint()
{
    if (IsIconic())
    {
        CPaintDC dc(this); // device context for painting

        SendMessage(WM_ICONERASEBKGND, reinterpret_cast<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
    {
        CDialogEx::OnPaint();
    }
}

// The system calls this function to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CFobsignupDlg::OnQueryDragIcon()
{
    return static_cast<HCURSOR>(m_hIcon);
}



void CFobsignupDlg::create_BN_CLICKED()
{
    // TODO: Add your control notification handler code here
    char buf[50];
    unsigned char chr_buf[12];
    unsigned char fob_buf[16];
    unsigned char pep_buf[16];
    unsigned char rke_buf[16];
    unsigned char message_buf[49];
    //unsigned char key_buf[16];
    int i, k, result;
    unsigned int peplen = 0, rkelen = 0;
    unsigned int index;
    CString str;
    CString str_show(fob_buf);
    CButton*pbutton;
    TCHAR chCurDir[MAX_PATH] = { 0 };
    GetCurrentDirectory(MAX_PATH, chCurDir);
    SetCurrentDirectory(_T("C:\Windows"));
    HMODULE hModule = ::LoadLibrary(_T("AES_DLL.dll"));
    //get context from edit1
    UpdateData(true);
    GetDlgItem(IDC_EDIT1)->GetWindowText(str);
    strcpy(buf, str);
    C2HFUN ToChar = (C2HFUN)::GetProcAddress(hModule, "char_to_hex");
    if (!ToChar(buf, fob_buf, 24))
    {
        AfxMessageBox("data invalid.");
    }
    else
    {
        fob_buf[12] = 0;
        fob_buf[13] = 0;
        fob_buf[14] = 0;
        fob_buf[15] = 0;
        m_Edit1 = "";
        for (i = 0,index=0; i < 12; i++)
        {
            if (IsDlgButtonChecked(IDC_CHECK1) == BST_CHECKED)
            {
                message_buf[index++] = fob_buf[11-i] ^ 0x38;
                str_show.Format("%X", fob_buf[11-i]);
            }
            else
            {
                message_buf[index++] = fob_buf[i] ^ 0x38;
                str_show.Format("%X", fob_buf[i]);
            }
            chr_buf[i] = fob_buf[i];
            k = strlen(str_show);
            if (k == 0)
            {
                m_Edit1 = "00";
            }
            else if (k == 1)
            {
                m_Edit1 += "0";
                m_Edit1 += str_show;
            }
            else
            {
                m_Edit1 += str_show;
            }
        }
        if (IsDlgButtonChecked(IDC_CHECK1) == BST_CHECKED)
        {
            for (i = 0; i < 12; i++)
            {
                fob_buf[i] = chr_buf[11 - i];
            }
            pbutton = (CButton*)GetDlgItem(IDC_CHECK1);
            pbutton->SetCheck(false);
        }
        if (IsDlgButtonChecked(IDC_CHECK2) == BST_CHECKED)
        {
            pbutton = (CButton*)GetDlgItem(IDC_CHECK2);
            pbutton->SetCheck(false);
        }
        if (IsDlgButtonChecked(IDC_CHECK3) == BST_CHECKED)
        {
            pbutton = (CButton*)GetDlgItem(IDC_CHECK3);
            pbutton->SetCheck(false);
        }
        if (IsDlgButtonChecked(IDC_CHECK4) == BST_CHECKED)
        {
            pbutton = (CButton*)GetDlgItem(IDC_CHECK4);
            pbutton->SetCheck(false);
        }
        if (IsDlgButtonChecked(IDC_CHECK5) == BST_CHECKED)
        {
            pbutton = (CButton*)GetDlgItem(IDC_CHECK5);
            pbutton->SetCheck(false);
        }
        if (IsDlgButtonChecked(IDC_CHECK6) == BST_CHECKED)
        {
            pbutton = (CButton*)GetDlgItem(IDC_CHECK6);
            pbutton->SetCheck(false);
        }
        if (IsDlgButtonChecked(IDC_CHECK7) == BST_CHECKED)
        {
            pbutton = (CButton*)GetDlgItem(IDC_CHECK7);
            pbutton->SetCheck(false);
        }
        if (IsDlgButtonChecked(IDC_CHECK8) == BST_CHECKED)
        {
            pbutton = (CButton*)GetDlgItem(IDC_CHECK8);
            pbutton->SetCheck(false);
        }
        AESFUN m_ase = (AESFUN)::GetProcAddress(hModule, "AesEncrypt");
        m_ase(dll_key_fob, fob_buf);
        m_Edit2 = m_Edit3 = m_Edit4 = m_Edit5 = m_Edit6 = m_Edit7 = m_Edit8 = m_Edit9 = "";
        for (i = 0; i < 16; i++)
        {
            str_show.Format("%X", fob_buf[i]);
            k = strlen(str_show);
            if (k == 0)
            {
                m_Edit2 = "00";
            }
            else if (k == 1)
            {
                m_Edit2 += "0";
                m_Edit2 += str_show;
            }
            else
            {
                m_Edit2 += str_show;
            }
        }
        hModule = ::LoadLibrary(_T("LaMotta FOB Signup_1.1_REL.dll"));
        PFUN m_dll = (PFUN)::GetProcAddress(hModule, "FobSignup");
        result = m_dll(16, 16, 16, fob_buf, &peplen, &rkelen, pep_buf, rke_buf);
        if (result == 0)
        {
            for (i = 0; i < 16; i++)
            {
                str_show.Format("%X", pep_buf[i]);
                k = strlen(str_show);
                if (k == 0)
                {
                    m_Edit3 = "00";
                }
                else if (k == 1)
                {
                    m_Edit3 += "0";
                    m_Edit3 += str_show;
                }
                else
                {
                    m_Edit3 += str_show;
                }
                str_show.Format("%X", rke_buf[i]);
                k = strlen(str_show);
                if (k == 0)
                {
                    m_Edit4 = "00";
                }
                else if (k == 1)
                {
                    m_Edit4 += "0";
                    m_Edit4 += str_show;
                }
                else
                {
                    m_Edit4 += str_show;
                }
            }
            hModule = ::LoadLibrary(_T("AES_DLL.dll"));
            m_ase = (AESFUN)::GetProcAddress(hModule, "ContraryAesEncrypt");
            m_ase(dll_key_PEP, pep_buf);
            m_ase(dll_key_RKE, rke_buf);
            for (i = 0; i < 16; i++)
            {
                str_show.Format("%X", pep_buf[i]);
                k = strlen(str_show);
                if (k == 0)
                {
                    m_Edit5 = "00";
                }
                else if (k == 1)
                {
                    m_Edit5 += "0";
                    m_Edit5 += str_show;
                }
                else
                {
                    m_Edit5 += str_show;
                }
                str_show.Format("%X", rke_buf[i]);
                k = strlen(str_show);
                if (k == 0)
                {
                    m_Edit6 = "00";
                }
                else if (k == 1)
                {
                    m_Edit6 += "0";
                    m_Edit6 += str_show;
                }
                else
                {
                    m_Edit6 += str_show;
                }
            }
            m_ase(bcm_key_PEP, pep_buf);
            m_ase(bcm_key_RKE, rke_buf);
            for (i = 0; i < 16; i++)
            {
                message_buf[index++] = pep_buf[i] ^ 0x38;
                str_show.Format("%X", pep_buf[i]);
                k = strlen(str_show);
                if (k == 0)
                {
                    m_Edit7 = "00";
                }
                else if (k == 1)
                {
                    m_Edit7 += "0";
                    m_Edit7 += str_show;
                }
                else
                {
                    m_Edit7 += str_show;
                }
                message_buf[index + 15] = rke_buf[i] ^ 0x38;
                str_show.Format("%X", rke_buf[i]);
                k = strlen(str_show);
                if (k == 0)
                {
                    m_Edit8 = "00";
                }
                else if (k == 1)
                {
                    m_Edit8 += "0";
                    m_Edit8 += str_show;
                }
                else
                {
                    m_Edit8 += str_show;
                }
            }
            index += 16;
            message_buf[index] = cal_crc(message_buf, index) ^ 0x83;
            for (i = 0; i < int(index + 1); i++)
            {
                str_show.Format("%X", message_buf[i]);
                k = strlen(str_show);
                if (k == 0)
                {
                    m_Edit9 = "00";
                }
                else if (k == 1)
                {
                    m_Edit9 += "0";
                    m_Edit9 += str_show;
                }
                else
                {
                    m_Edit9 += str_show;
                }
            }
            CComboBox* pct = (CComboBox *)this->GetDlgItem(IDC_COMBO1);
            if (pct->GetCurSel() == 2)
            {
                m_Edit9 += "315MHz";
            }
            else if (pct->GetCurSel() == 1)
            {
                m_Edit9 += "433MHz";
            }
            else if (pct->GetCurSel() == 0)
            {
                m_Edit9 += "Scaner";
            }
            else
            {
                m_Edit9 += "Scaner";
            }
        }
    }
    UpdateData(false);
    SetCurrentDirectory(chCurDir);
    ::FreeLibrary(hModule);
}

void CFobsignupDlg::Clear_BN_CLICKED()
{
    // TODO: Add your control notification handler code here
    m_Edit2 = m_Edit3 = m_Edit4 = m_Edit5 = m_Edit6 = m_Edit7 = m_Edit8 = m_Edit9 = "";
    UpdateData(false);
}
BEGIN_EVENTSINK_MAP(CFobsignupDlg, CDialogEx)
    ON_EVENT(CFobsignupDlg, IDC_MSCOMM1, 1, CFobsignupDlg::OnCommMscomm1, VTS_NONE)
END_EVENTSINK_MAP()


void CFobsignupDlg::OnCommMscomm1()
{
    // TODO: Add your message handler code here
    long len, i;
    BYTE rxdata[64];                                    //rx buffer
    VARIANT variant_inp;
    COleSafeArray safearray_inp;
    CButton*pt = (CButton*)GetDlgItem(IDC_CHECK1);
    CMscomm1 *pcom = (CMscomm1*)this->GetDlgItem(IDC_MSCOMM1); 
    if (pcom->get_CommEvent() == 2)
    {
        variant_inp = pcom->get_Input();                //read rx buffer
        safearray_inp = variant_inp;                    //VARIANT to COleSafeArray calss
        len = safearray_inp.GetOneDimSize();            //get the active length of data byte
        if (len != 30)
            return;
        if (IsDlgButtonChecked(IDC_CHECK1) == BST_CHECKED)
        {
            pt->SetCheck(false);
        }
        m_Edit1 = "";
        for (i = 0; i<(len - 2); i++)                    //ignore '
' symbol
        {
            safearray_inp.GetElement(&i, rxdata + i);
            if ((i+1)%5 == 0);                            //ignore space symbols
            else
            {
                m_Edit1 += rxdata[i];
            }
        }
        UpdateData(false);
    }
}


void CFobsignupDlg::write_BN_CLICKED()
{
    // TODO: Add your control notification handler code here
    CMscomm1 *pcomm = (CMscomm1 *)this->GetDlgItem(IDC_MSCOMM1);
    if (pcomm->get_PortOpen()==false)
    {
        MessageBox("Serial Port DID NOT Open.");
    }
    else if (m_Edit9 == "")
    {
        MessageBox("No message Write.");
    }
    else
    {
        pcomm->put_Output(COleVariant(m_Edit9));
    }
}


void CFobsignupDlg::Open_Close_BN_CLICKED()
{
    // TODO: Add your control notification handler code here
    CMscomm1 *pcm = (CMscomm1 *)this ->GetDlgItem(IDC_MSCOMM1);
    CComboBox* pFreq = (CComboBox *)this->GetDlgItem(IDC_COMBO1);
    CComboBox* pport = (CComboBox *)this->GetDlgItem(IDC_COMBO2);
    CComboBox* pbaud = (CComboBox *)this->GetDlgItem(IDC_COMBO3);
    if (pcm->get_PortOpen() == false)
    {
        pcm->put_CommPort(pport->GetCurSel());
        if (pbaud->GetCurSel() == 0)
        {
            pcm->put_Settings("2400,n,8,1");
        }
        else if (pbaud->GetCurSel() == 1)
        {
            pcm->put_Settings("4800,n,8,1");
        }
        else if (pbaud->GetCurSel() == 2)
        {
            pcm->put_Settings("9600,n,8,1");
        }
        else if (pbaud->GetCurSel() == 3)
        {
            pcm->put_Settings("38400,n,8,1");
        }
        else if (pbaud->GetCurSel() == 4)
        {
            pcm->put_Settings("115200,n,8,1");
        }
        else
        {
            pcm->put_Settings("9600,n,8,1");
        }
        pcm->put_InputMode(1);                //1: read data by binary checking
        pcm->put_RThreshold(30);            //onComm event trigger when N byte in input buffer
        pcm->put_InputLen(0);                //set input length 0.
        pcm->put_PortOpen(true);
    }
    else
    {
        pcm->put_PortOpen(false);
    }
    if (pcm->get_PortOpen() == false)
    {
        SetDlgItemTextA(IDC_BUTTON4, "Open");
        pport->EnableWindow(true);
        pbaud->EnableWindow(true);
        pFreq->EnableWindow(true);
    }
    else
    {
        SetDlgItemTextA(IDC_BUTTON4, "Close");
        pport->EnableWindow(false);
        pbaud->EnableWindow(false);
        pFreq->EnableWindow(false);
    }
}


void CFobsignupDlg::checkBox1_BN_CLICKED()
{
    // TODO: Add your control notification handler code here
    char buf[50];
    int i, k;
    unsigned char fob_buf[16];
    CString str;
    CString str_show(fob_buf);
    CButton*pt = (CButton*)GetDlgItem(IDC_CHECK1);
    //get context from edit1
    UpdateData(true);
    GetDlgItem(IDC_EDIT1)->GetWindowText(str);
    if (IsDlgButtonChecked(IDC_CHECK1) == BST_CHECKED)
    {
        if (str.GetLength() == 0)
        {
            pt->SetCheck(false);
            AfxMessageBox("zero length");
            return;
        }
    }
    else if (str.GetLength() == 0)
    {
        return;
    }
    strcpy(buf, str);
    TCHAR chCurDir[MAX_PATH] = { 0 };
    GetCurrentDirectory(MAX_PATH, chCurDir);
    SetCurrentDirectory(_T("C:\Windows"));
    HMODULE hModule = ::LoadLibrary(_T("AES_DLL.dll"));
    C2HFUN ToChar = (C2HFUN)::GetProcAddress(hModule, "char_to_hex");
    if (!ToChar(buf, fob_buf, 24))
    {
        pt->SetCheck(false);
        AfxMessageBox("data invalid.");
    }
    else
    {
        fob_buf[12] = 0;
        fob_buf[13] = 0;
        fob_buf[14] = 0;
        fob_buf[15] = 0;
        m_Edit1 = "";
        for (i = 0; i < 12; i++)
        {
            str_show.Format("%X", fob_buf[11 - i]);
            k = strlen(str_show);
            if (k == 0)
            {
                m_Edit1 = "00";
            }
            else if (k == 1)
            {
                m_Edit1 += "0";
                m_Edit1 += str_show;
            }
            else
            {
                m_Edit1 += str_show;
            }
        }
    }
    UpdateData(false); 
    SetCurrentDirectory(chCurDir);
    ::FreeLibrary(hModule);
}


void CFobsignupDlg::checkBox2_BN_CLICKED()
{
    // TODO: Add your control notification handler code here
    char buf[96];
    int i, k;
    unsigned char fob_buf[16];
    CString str;
    CString str_show(fob_buf);
    CButton*pt = (CButton*)GetDlgItem(IDC_CHECK2);
    //get context from edit1
    UpdateData(true);
    GetDlgItem(IDC_EDIT2)->GetWindowText(str);
    if (IsDlgButtonChecked(IDC_CHECK2) == BST_CHECKED)
    {
        if (str.GetLength() == 0)
        {
            pt->SetCheck(false);
            AfxMessageBox("zero length");
            return;
        }
    }
    else if (str.GetLength() == 0)
    {
        return;
    }
    strcpy(buf, str);
    TCHAR chCurDir[MAX_PATH] = { 0 };
    GetCurrentDirectory(MAX_PATH, chCurDir);
    SetCurrentDirectory(_T("C:\Windows"));
    HMODULE hModule = ::LoadLibrary(_T("AES_DLL.dll"));
    C2HFUN ToChar = (C2HFUN)::GetProcAddress(hModule, "char_to_hex");
    if (!ToChar(buf, fob_buf, 32))
    {
        pt->SetCheck(false);
        AfxMessageBox("data invalid.");
    }
    else
    {
        m_Edit2 = "";
        for (i = 0; i < 16; i++)
        {
            str_show.Format("%X", fob_buf[15 - i]);
            k = strlen(str_show);
            if (k == 0)
            {
                m_Edit2 = "00";
            }
            else if (k == 1)
            {
                m_Edit2 += "0";
                m_Edit2 += str_show;
            }
            else
            {
                m_Edit2 += str_show;
            }
        }
    }
    UpdateData(false);
    SetCurrentDirectory(chCurDir);
    ::FreeLibrary(hModule);
}


void CFobsignupDlg::checkBox3_BN_CLICKED()
{
    // TODO: Add your control notification handler code here
    char buf[96];
    int i, k;
    unsigned char fob_buf[16];
    CString str;
    CString str_show(fob_buf);
    CButton*pt = (CButton*)GetDlgItem(IDC_CHECK3);
    //get context from edit1
    UpdateData(true);
    GetDlgItem(IDC_EDIT3)->GetWindowText(str);
    if (IsDlgButtonChecked(IDC_CHECK3) == BST_CHECKED)
    {
        if (str.GetLength() == 0)
        {
            pt->SetCheck(false);
            AfxMessageBox("zero length");
            return;
        }
    }
    else if (str.GetLength() == 0)
    {
        return;
    }
    strcpy(buf, str);
    TCHAR chCurDir[MAX_PATH] = { 0 };
    GetCurrentDirectory(MAX_PATH, chCurDir);
    SetCurrentDirectory(_T("C:\Windows"));
    HMODULE hModule = ::LoadLibrary(_T("AES_DLL.dll"));
    C2HFUN ToChar = (C2HFUN)::GetProcAddress(hModule, "char_to_hex");
    if (!ToChar(buf, fob_buf, 32))
    {
        pt->SetCheck(false);
        AfxMessageBox("data invalid.");
    }
    else
    {
        m_Edit3 = "";
        for (i = 0; i < 16; i++)
        {
            str_show.Format("%X", fob_buf[15 - i]);
            k = strlen(str_show);
            if (k == 0)
            {
                m_Edit3 = "00";
            }
            else if (k == 1)
            {
                m_Edit3 += "0";
                m_Edit3 += str_show;
            }
            else
            {
                m_Edit3 += str_show;
            }
        }
    }
    UpdateData(false);
    SetCurrentDirectory(chCurDir);
    ::FreeLibrary(hModule);
}


void CFobsignupDlg::checkBox4_BN_CLICKED()
{
    // TODO: Add your control notification handler code here
    char buf[96];
    int i, k;
    unsigned char fob_buf[16];
    CString str;
    CString str_show(fob_buf);
    CButton*pt = (CButton*)GetDlgItem(IDC_CHECK4);
    //get context from edit1
    UpdateData(true);
    GetDlgItem(IDC_EDIT4)->GetWindowText(str);
    if (IsDlgButtonChecked(IDC_CHECK4) == BST_CHECKED)
    {
        if (str.GetLength() == 0)
        {
            pt->SetCheck(false);
            AfxMessageBox("zero length");
            return;
        }
    }
    else if (str.GetLength() == 0)
    {
        return;
    }
    strcpy(buf, str);
    TCHAR chCurDir[MAX_PATH] = { 0 };
    GetCurrentDirectory(MAX_PATH, chCurDir);
    SetCurrentDirectory(_T("C:\Windows"));
    HMODULE hModule = ::LoadLibrary(_T("AES_DLL.dll"));
    C2HFUN ToChar = (C2HFUN)::GetProcAddress(hModule, "char_to_hex");
    if (!ToChar(buf, fob_buf, 32))
    {
        pt->SetCheck(false);
        AfxMessageBox("data invalid.");
    }
    else
    {
        m_Edit4 = "";
        for (i = 0; i < 16; i++)
        {
            str_show.Format("%X", fob_buf[15 - i]);
            k = strlen(str_show);
            if (k == 0)
            {
                m_Edit4 = "00";
            }
            else if (k == 1)
            {
                m_Edit4 += "0";
                m_Edit4 += str_show;
            }
            else
            {
                m_Edit4 += str_show;
            }
        }
    }
    UpdateData(false);
    SetCurrentDirectory(chCurDir);
    ::FreeLibrary(hModule);
}


void CFobsignupDlg::checkBox5_BN_CLICKED()
{
    // TODO: Add your control notification handler code here
    char buf[96];
    int i, k;
    unsigned char fob_buf[16];
    CString str;
    CString str_show(fob_buf);
    CButton*pt = (CButton*)GetDlgItem(IDC_CHECK5);
    //get context from edit1
    UpdateData(true);
    GetDlgItem(IDC_EDIT5)->GetWindowText(str);
    if (IsDlgButtonChecked(IDC_CHECK5) == BST_CHECKED)
    {
        if (str.GetLength() == 0)
        {
            pt->SetCheck(false);
            AfxMessageBox("zero length");
            return;
        }
    }
    else if (str.GetLength() == 0)
    {
        return;
    }
    strcpy(buf, str);
    TCHAR chCurDir[MAX_PATH] = { 0 };
    GetCurrentDirectory(MAX_PATH, chCurDir);
    SetCurrentDirectory(_T("C:\Windows"));
    HMODULE hModule = ::LoadLibrary(_T("AES_DLL.dll"));
    C2HFUN ToChar = (C2HFUN)::GetProcAddress(hModule, "char_to_hex");
    if (!ToChar(buf, fob_buf, 32))
    {
        pt->SetCheck(false);
        AfxMessageBox("data invalid.");
    }
    else
    {
        m_Edit5 = "";
        for (i = 0; i < 16; i++)
        {
            str_show.Format("%X", fob_buf[15 - i]);
            k = strlen(str_show);
            if (k == 0)
            {
                m_Edit5 = "00";
            }
            else if (k == 1)
            {
                m_Edit5 += "0";
                m_Edit5 += str_show;
            }
            else
            {
                m_Edit5 += str_show;
            }
        }
    }
    UpdateData(false);
    SetCurrentDirectory(chCurDir);
    ::FreeLibrary(hModule);
}


void CFobsignupDlg::checkBox6_BN_CLICKED()
{
    // TODO: Add your control notification handler code here
    char buf[96];
    int i, k;
    unsigned char fob_buf[16];
    CString str;
    CString str_show(fob_buf);
    CButton*pt = (CButton*)GetDlgItem(IDC_CHECK6);
    //get context from edit1
    UpdateData(true);
    GetDlgItem(IDC_EDIT6)->GetWindowText(str);
    if (IsDlgButtonChecked(IDC_CHECK6) == BST_CHECKED)
    {
        if (str.GetLength() == 0)
        {
            pt->SetCheck(false);
            AfxMessageBox("zero length");
            return;
        }
    }
    else if (str.GetLength() == 0)
    {
        return;
    }
    strcpy(buf, str);
    TCHAR chCurDir[MAX_PATH] = { 0 };
    GetCurrentDirectory(MAX_PATH, chCurDir);
    SetCurrentDirectory(_T("C:\Windows"));
    HMODULE hModule = ::LoadLibrary(_T("AES_DLL.dll"));
    C2HFUN ToChar = (C2HFUN)::GetProcAddress(hModule, "char_to_hex");
    if (!ToChar(buf, fob_buf, 32))
    {
        pt->SetCheck(false);
        AfxMessageBox("data invalid.");
    }
    else
    {
        m_Edit6 = "";
        for (i = 0; i < 16; i++)
        {
            str_show.Format("%X", fob_buf[15 - i]);
            k = strlen(str_show);
            if (k == 0)
            {
                m_Edit6 = "00";
            }
            else if (k == 1)
            {
                m_Edit6 += "0";
                m_Edit6 += str_show;
            }
            else
            {
                m_Edit6 += str_show;
            }
        }
    }
    UpdateData(false);
    SetCurrentDirectory(chCurDir);
    ::FreeLibrary(hModule);
}


void CFobsignupDlg::checkBox7_BN_CLICKED()
{
    // TODO: Add your control notification handler code here
    char buf[96];
    int i, k;
    unsigned char fob_buf[16];
    CString str;
    CString str_show(fob_buf);
    CButton*pt = (CButton*)GetDlgItem(IDC_CHECK7);
    //get context from edit1
    UpdateData(true);
    GetDlgItem(IDC_EDIT7)->GetWindowText(str);
    if (IsDlgButtonChecked(IDC_CHECK7) == BST_CHECKED)
    {
        if (str.GetLength() == 0)
        {
            pt->SetCheck(false);
            AfxMessageBox("zero length");
            return;
        }
    }
    else if (str.GetLength() == 0)
    {
        return;
    }
    strcpy(buf, str);
    TCHAR chCurDir[MAX_PATH] = { 0 };
    GetCurrentDirectory(MAX_PATH, chCurDir);
    SetCurrentDirectory(_T("C:\Windows"));
    HMODULE hModule = ::LoadLibrary(_T("AES_DLL.dll"));
    C2HFUN ToChar = (C2HFUN)::GetProcAddress(hModule, "char_to_hex");
    if (!ToChar(buf, fob_buf, 32))
    {
        pt->SetCheck(false);
        AfxMessageBox("data invalid.");
    }
    else
    {
        m_Edit7 = "";
        for (i = 0; i < 16; i++)
        {
            str_show.Format("%X", fob_buf[15 - i]);
            k = strlen(str_show);
            if (k == 0)
            {
                m_Edit7 = "00";
            }
            else if (k == 1)
            {
                m_Edit7 += "0";
                m_Edit7 += str_show;
            }
            else
            {
                m_Edit7 += str_show;
            }
        }
    }
    UpdateData(false);
    SetCurrentDirectory(chCurDir);
    ::FreeLibrary(hModule);
}


void CFobsignupDlg::checkBox8_BN_CLICKED()
{
    // TODO: Add your control notification handler code here
    char buf[96];
    int i, k;
    unsigned char fob_buf[16];
    CString str;
    CString str_show(fob_buf);
    CButton*pt = (CButton*)GetDlgItem(IDC_CHECK8);
    //get context from edit1
    UpdateData(true);
    GetDlgItem(IDC_EDIT8)->GetWindowText(str);
    if (IsDlgButtonChecked(IDC_CHECK8) == BST_CHECKED)
    {
        if (str.GetLength() == 0)
        {
            pt->SetCheck(false);
            AfxMessageBox("zero length");
            return;
        }
    }
    else if (str.GetLength() == 0)
    {
        return;
    }
    strcpy(buf, str);
    TCHAR chCurDir[MAX_PATH] = { 0 };
    GetCurrentDirectory(MAX_PATH, chCurDir);
    SetCurrentDirectory(_T("C:\Windows"));
    HMODULE hModule = ::LoadLibrary(_T("AES_DLL.dll"));
    C2HFUN ToChar = (C2HFUN)::GetProcAddress(hModule, "char_to_hex");
    if (!ToChar(buf, fob_buf, 32))
    {
        pt->SetCheck(false);
        AfxMessageBox("data invalid.");
    }
    else
    {
        m_Edit8 = "";
        for (i = 0; i < 16; i++)
        {
            str_show.Format("%X", fob_buf[15 - i]);
            k = strlen(str_show);
            if (k == 0)
            {
                m_Edit8 = "00";
            }
            else if (k == 1)
            {
                m_Edit8 += "0";
                m_Edit8 += str_show;
            }
            else
            {
                m_Edit8 += str_show;
            }
        }
    }
    UpdateData(false);
    SetCurrentDirectory(chCurDir);
    ::FreeLibrary(hModule);
}

Thanks,

End.