I always said myself to not work at night...
However, I did it with the following code
Qt Code: 
  1. if (usernames.contains(username.trimmed()))
  2.     {
  3.         p = passwords.at(usernames.indexOf(username));
  4.         qDebug()<<"LD password"
  5.                 "input"<<p<<QCryptographicHash::hash(password.toLocal8Bit(),QCryptographicHash::Md4).toHex();
  6.         in = QString::fromLocal8Bit(QCryptographicHash::hash(password.toLocal8Bit(),QCryptographicHash::Md4).toHex());
  7.  
  8.     if ( in ==  p)
  9.     {
  10.        qDebug()<<"ACCEPTED"<< p.toLocal8Bit() << in;
  11.        return true;
  12.     }
  13.     else
  14.     {
  15.         qDebug()<<"NO ACCEPTED"<<in<<p<<in.size()<<in.size();
  16.         return false;
  17.         SleeperThread::msleep(900);
  18.     }
  19.  
  20.     }
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where the password is stored in a file as heX.
Regards