Simple Encrypt For Qt and PHP

[wirasto]

I found simple encrypt/decrypt for PHP here.

The result is:

Enc: 6dXM5pPw0ODLi+LR1pPX4I/X0t7g4srj5uA=
Dec: teks yang mau di enskripsi

I try decrypt from Qt with this function, but failed

QString Dialog::dec(const QByteArray &teks, const QString &pwd) const
{
    QString result;
    QString string(QByteArray::fromBase64(teks).constData());
 
    int i;
    QChar chr;
    QChar keychr;
    for (i=0; i < string.length(); i++) {
        keychr=pwd.at( (i % pwd.length()) - 1 );
        chr = QChar(string.at(i).unicode() - keychr.unicode());
        result.append(chr);
    }
 
    return result;
}
 
...
....
 
qDebug() << dec("6dXM5pPw0ODLi+LR1pPX4I/X0t7g4srj5uA=", "passwordku");

QString Dialog::dec(const QByteArray &teks, const QString &pwd) const
{
    QString result;
    QString string(QByteArray::fromBase64(teks).constData());

    int i;
    QChar chr;
    QChar keychr;
    for (i=0; i < string.length(); i++) {
        keychr=pwd.at( (i % pwd.length()) - 1 );
        chr = QChar(string.at(i).unicode() - keychr.unicode());
        result.append(chr);
    }

    return result;
}

...
....

qDebug() << dec("6dXM5pPw0ODLi+LR1pPX4I/X0t7g4srj5uA=", "passwordku");

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The Qt result is

éeks yang âau di ensà ripsi

I think there is something different between php and Qt

[wysota]

Yes, the code

BTW. It is hard to call what you have there "encryption". It's so weak it can be broken manually within minutes.