Integrity data fails on the recompile

[Cobra91151]

Hi! I have a program that encrypt the password, stores it in the registry and displays it later.

I use SimpleCrypt to encrypt and decrypt the password. It works well, but the strange issue is when recompile the application. Then, it displays the empty string. I have checked:

bool integrityOk(true);
    if (flags.testFlag(CryptoFlagChecksum)) {
        if (ba.length() < 2) {
            m_lastError = ErrorIntegrityFailed;
            return QByteArray();
        }
        quint16 storedChecksum;
        {
            QDataStream s(&ba, QIODevice::ReadOnly);
            s >> storedChecksum;
        }
        ba = ba.mid(2);
        quint16 checksum = qChecksum(ba.constData(), ba.length());

        qDebug() << checksum;
        qDebug() << storedChecksum;

        integrityOk = (checksum == storedChecksum);

        qDebug() << integrityOk; // false
    }

    if (!integrityOk) {
        qDebug() << "Test";
        m_lastError = ErrorIntegrityFailed;
        return QByteArray();
    }

Integrity check fails and it return the empty string. Any ideas? Thanks.

[SGaist]

Hi,

Check your seeding, also, you should fix the version of the QDataStream you are using otherwise you might hit compatibility problem using different version of Qt.

[Cobra91151]

@SGaist

I have set the version.

Code:

QDataStream s(&ba, QIODevice::ReadOnly);
s.setVersion(QDataStream::Qt_5_7);

But the same issue exists. What do you mean by: Check your seeding?

[SGaist]

Check how you are initialising your SimpleCrypt object.

[Cobra91151]

@SGaist

I have fixed the problem. The problem was with the wrong key implementation. Thank you.

[SGaist]

You're welcome !

Out of curiosity, what do you mean by "wrong key implementation" ?