This is how I generate joomla like salt for passwords and how I implement them in my programs for joomla interpolarity.

QString clSettings::createrandomsalt(int maxVal)
{
    //48-57 - Numbers 0-9
    //65-90 - Uppercase letters A-Z
    //97-122 - Lowercase letters a-z

    QString strSalt = NULL;
    int rndNum = 0;
    for (int i = 0; i < maxVal; i++)
    {
        numGen:
        rndNum = qrand() % (122 + 48);

        if ((rndNum > 48 && rndNum < 57) || (rndNum > 65 && rndNum < 90) || (rndNum > 97 && rndNum < 122))
        {
            strSalt += (char*)&rndNum;
        } else { goto numGen; }
    }
    return strSalt;
}

void clSettings::givemepwd(QString tmpPassword)
{
    QString strSalt = createrandomsalt(32);
    QString str_password = tmpPassword + strSalt;
    QByteArray hash = QCryptographicHash::hash(str_password.toUtf8(), QCryptographicHash::Md5);
    str_password = hash.toHex().append(":" + strSalt);
}

hash for “password” with random string “lIJEeW3yIs8los8bGVFfYT67YySX2CKh” .
output:

0626dada27ff423156ae0962d7d9a4f2:lIJEeW3yIs8los8bGVFfYT67YySX2CKh