Automatic Login

hi all
I have a OSticket an open source ticket support

my problem is that I cant login to user aria with
http://domain.com/login?username=xuser&passwd=xpassword
some thing with _GET data and _POST data.
need that because I develop a desktop application and my clients no need to sign in to open ticket
every client will have the login information in the desktop app
so any idea

here the login.php code

    <?php
/*********************************************************************
    login.php

    User access link recovery

    TODO: This is a temp. fix to allow for collaboration in lieu of real
    username and password coming in 1.8.2

    Peter Rotich <[email protected]>
    Copyright (c)  2006-2013 osTicket
    http://www.osticket.com

    Released under the GNU General Public License WITHOUT ANY WARRANTY.
    See LICENSE.TXT for details.

    vim: expandtab sw=4 ts=4 sts=4:
**********************************************************************/
require_once('client.inc.php');
if(!defined('INCLUDE_DIR')) die('Fatal Error');
define('CLIENTINC_DIR',INCLUDE_DIR.'client/');
define('OSTCLIENTINC',TRUE); //make includes happy

require_once(INCLUDE_DIR.'class.client.php');
require_once(INCLUDE_DIR.'class.ticket.php');

if ($cfg->getClientRegistrationMode() == 'disabled'
        || isset($_POST['lticket']))
    $inc = 'accesslink.inc.php';
else
     $inc = 'login.inc.php';

$suggest_pwreset = false;

// Check the CSRF token, and ensure that future requests will have to use a
// different CSRF token. This will help ward off both parallel and serial
// brute force attacks, because new tokens will have to be requested for
// each attempt.
if ($_POST) {
    // Check CSRF token
    if (!$ost->checkCSRFToken())
        Http::response(400, __('Valid CSRF Token Required'));

    // Rotate the CSRF token (original cannot be reused)
    $ost->getCSRF()->rotate();
}

if ($_POST && isset($_POST['luser'])) {
    if (!$_POST['luser'])
        $errors['err'] = __('Valid username or email address is required');
    elseif (($user = UserAuthenticationBackend::process($_POST['luser'],
            $_POST['lpasswd'], $errors))) {
        if ($user instanceof ClientCreateRequest) {
            if ($cfg && $cfg->isClientRegistrationEnabled()) {
                // Attempt to automatically register
                if ($user->attemptAutoRegister())
                    Http::redirect('tickets.php');

                // Auto-registration failed. Show the user the info we have
                $inc = 'register.inc.php';
                $user_form = UserForm::getUserForm()->getForm($user->getInfo());
            }
            else {
                $errors['err'] = __('Access Denied. Contact your help desk administrator to have an account registered for you');
                // fall through to show login page again
            }
        }
        else {
            Http::redirect($_SESSION['_client']['auth']['dest']
                ?: 'tickets.php');
        }
    } elseif(!$errors['err']) {
        $errors['err'] = sprintf('%s - %s', __('Invalid username or password'), __('Please try again!'));
    }
    $suggest_pwreset = true;
}
elseif ($_POST && isset($_POST['lticket'])) {
    if (!Validator::is_email($_POST['lemail']))
        $errors['err'] = __('Valid email address and ticket number required');
    elseif (($user = UserAuthenticationBackend::process($_POST['lemail'],
            $_POST['lticket'], $errors))) {

        // If email address verification is not required, then provide
        // immediate access to the ticket!
        if (!$cfg->isClientEmailVerificationRequired())
            Http::redirect('tickets.php');

        // This will succeed as it is checked in the authentication backend
        $ticket = Ticket::lookupByNumber($_POST['lticket'], $_POST['lemail']);

        // We're using authentication backend so we can guard aganist brute
        // force attempts (which doesn't buy much since the link is emailed)
        $ticket->sendAccessLink($user);
        $msg = sprintf(__("%s - access link sent to your email!"),
            Format::htmlchars($user->getName()->getFirst()));
        $_POST = null;
    } elseif(!$errors['err']) {
        $errors['err'] = sprintf('%s - %s', __('Invalid email or ticket number'), __('Please try again!'));
    }
}
elseif (isset($_GET['do'])) {
    switch($_GET['do']) {
    case 'ext':
        // Lookup external backend
        if ($bk = UserAuthenticationBackend::getBackend($_GET['bk']))
            $bk->triggerAuth();
    }
}
elseif ($user = UserAuthenticationBackend::processSignOn($errors, false)) {
    // Users from the ticket access link
    if ($user && $user instanceof TicketUser && $user->getTicketId())
        Http::redirect('tickets.php?id='.$user->getTicketId());
    // Users imported from an external auth backend
    elseif ($user instanceof ClientCreateRequest) {
        if ($cfg && $cfg->isClientRegistrationEnabled()) {
            // Attempt to automatically register
            if ($user->attemptAutoRegister())
                Http::redirect('tickets.php');

            // Unable to auto-register. Fill in what we have and let the
            // user complete the info
            $inc = 'register.inc.php';
        }
        else {
            $errors['err'] = __('Access Denied. Contact your help desk administrator to have an account registered for you');
            // fall through to show login page again
        }
    }
    elseif ($user instanceof AuthenticatedUser) {
        Http::redirect($_SESSION['_client']['auth']['dest']
                ?: 'tickets.php');
    }
}

if (!$nav) {
    $nav = new UserNav();
    $nav->setActiveNav('status');
}

// Browsers shouldn't suggest saving that username/password
Http::response(422);

require CLIENTINC_DIR.'header.inc.php';
require CLIENTINC_DIR.$inc;
require CLIENTINC_DIR.'footer.inc.php';
?>



thanks for help

Well, I did not look at any of your code. It was hard to read. But, let’s talk about what you really want.
First, you never, ever, never use $_GET to handle passwords or usernames for login’s! That is a huge
security hole. Just not any type of safe system to use. Any beginner hacker could write a script to hack into
your site with ease.

You can use posted code. So, the question is how did you write the desktop app? What language did you use. Each language would require a different way to communicate with a website. If you wrote it in .NET or Java (not Javascript) then, you can use web-methods to access AJAX and get back Jason data back and forth as needed.
But, since most programmers just use the internet and PHP to handle this type of “app”, it is done with normal logins. Assuming that your “app” is written client-side in a .NET system or Java, it is harder to accomplish.

Why do you need to have it client-side as an APP?

Follow their documentation?
https://docs.osticket.com/en/latest/Developer%20Documentation/API%20Docs.html
https://docs.osticket.com/en/latest/Developer%20Documentation/API/Tickets.html

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