/**
Auxilary function should be called only when we need to generate hash values from the screen and returns its hex format.
@param aHexString the output MD5 hash hex string obtained from iBitmapDevice
*/
EXPORT_C void CTHashReferenceImages::GenerateHashAndReturnInHexFormatL(TDes &aHexString)
{
TInt bufLen = CFbsBitmap::ScanLineLength(iBitmapDevice->SizeInPixels().iWidth, iBitmapDevice->DisplayMode());
RBuf8 buff;
buff.CreateL(bufLen);
CleanupClosePushL(buff);
CMD5 *md = CMD5::NewL();
CleanupStack::PushL(md);
for (TPoint pos(0, 0); pos.iY < iBitmapDevice->SizeInPixels().iHeight; pos.iY++)
{
iBitmapDevice->GetScanLine(buff,pos,iBitmapDevice->SizeInPixels().iWidth,iBitmapDevice->DisplayMode());
md->Update(buff);
}
TBuf8<KLengthOfHashValue> hashString;
//md will be reset after calling CMD5::Final() as Final will call Reset.
hashString.Copy(md->Final());
aHexString.Zero();
for(TInt icount=0; icount < hashString.Length(); icount++)
{
aHexString.AppendNumFixedWidth(hashString[icount], EHex, 4);
}
CleanupStack::PopAndDestroy(2, &buff);
}
void CRegisterDlg::OnOK()
{
CMD5 crypt;
CString strTemp;
UpdateData();
m_strName.TrimLeft();
m_strName.TrimRight();
m_strKey.TrimLeft();
m_strKey.TrimRight();
strTemp = m_strName.Left(32);
strTemp += MD5_HASH_KEY;
crypt.setPlainText(strTemp);
if (!m_strKey.Compare(crypt.getMD5Digest()))
{
CWinApp* pApp = AfxGetApp();
UpdateData();
pApp->WriteProfileString("Options", "Name", m_strName);
pApp->WriteProfileString("Options", "Key", m_strKey);
MessageBox("Registration key accepted! Thank you for registering.", "Success");
}
else
{
MessageBox("Invalid registration key. Please try again.", "Error");
return;
}
CDialog::OnOK();
}
bool CMD5::operator==(const CMD5& rhs)
{
if (!isDigestValid() || !rhs.isDigestValid())
{
return false;
}
const char* rhsDigest = rhs.getMD5Digest();
int result = strncmp(m_digestString, rhsDigest , 33);
return (result == 0);
}
