deauth.php

<?php
/**
 * @version    $Id: myauth.php 7180 2007-04-23 16:51:53Z jinx $
 * @package    Joomla.Tutorials
 * @subpackage Plugins
 * @license    GNU/GPL
 */

// Check to ensure this file is included in Joomla!
defined('_JEXEC') or die();

/**
 * Example Authentication Plugin.  Based on the example.php plugin in the Joomla! Core installation
 *
 * @package    Joomla.Tutorials
 * @subpackage Plugins
 * @license    GNU/GPL
 */
class plgAuthenticationDeauth extends JPlugin
{
    /**
     * This method should handle any authentication and report back to the subject
     * This example uses simple authentication - it checks if the password is the reverse
     * of the username (and the user exists in the database).
     *
     * @access    public
     * @param     array     $credentials    Array holding the user credentials ('username' and 'password')
     * @param     array     $options        Array of extra options
     * @param     object    $response       Authentication response object
     * @return    boolean
     * @since 1.5
     */
    function onUserAuthenticate( $credentials, $options, &$response )
    {
         $username = $credentials['username'];
         $dbservername = "";
         $dbusername = "";
         $dbpassword = "";
         $dbname = "";

          // Create connection
          $conn = new mysqli($dbservername, $dbusername, $dbpassword, $dbname);
           if ($conn->connect_error) {
              $response->status = STATUS_FAILURE;
              $response->error_message = "Connection Error";
           }
           $sql = "SELECT password FROM dep WHERE username = '$username'";
           $result = $conn->query($sql);

        if (!$result) {
            $response->status = STATUS_FAILURE;
            $response->error_message = "User does not exist";
        }

        while ($row = $result->fetch_assoc()) {
            $password = $row["password"];
            echo $password;
        }
        /**
         * To authenticate, the username must exist in the database, and the password should be equal
         * to the reverse of the username (so user joeblow would have password wolbeoj)
         */
         $password2 = md5($credentials['password']);
         echo $password2;
        if($result && ($password2 == $password ))
        {
        $email = JUser::getInstance($result); // Bring this in line with the rest of the system
        $response->email = $email->email;
        $response->status = JAuthentication::STATUS_SUCCESS;

        }
        else
        {
            $response->status = JAuthentication::STATUS_FAILURE;
            $response->error_message = 'Invalid username and password';
        }
        $conn->close();
    }
}
?>