Authenticator.inc
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<?php
/**
* $Id$
*
* Interface class that performs all authentication functions.
*
* Licensed under the GNU GPL. For full terms see the file COPYING.
*
* @version $Revision$
* @author Michael Joseph <michael@jamwarehouse.com>, Jam Warehouse (Pty) Ltd, South Africa
* @package lib.authentication
*/
class Authenticator {
/**
* Verifies the login credentials
*
* @param string the user name of the user logging in
* @param string the user's password
* @return array containing userID and authentication status code
*/
function login($userName, $password) {
global $default, $lang_err_database;
// initialise return array
$userDetails = array();
if ($this->checkPassword($userName, $password)) {
// retrieve the userID
$userID = lookupID($default->owl_users_table, "username", "$userName");
$default->log->info("Authenticator::login authenticated user, id=$userID");
if ($userID) {
// add this to the return array
$userDetails["userID"] = $userID;
// remove stale sessions from the database for the user
// that is signing on.
Session::removeStaleSessions($userDetails["userID"]);
// Check if Maxsessions has been reached
// lookup maxsessions
$maxSessions = lookupField($default->owl_users_table, "max_sessions", "id", $userID);
$sql = new Owl_DB;
if ($sql->query("SELECT * FROM $default->owl_sessions_table WHERE user_id = '".$userDetails["user_id"]."'")) {
if ($sql->num_rows($sql) >= $maxSessions) {
// return too many sessions status code
$userDetails["status"] = 3;
} else {
// authenticated successfully
$userDetails["status"] = 1;
}
// FIXME: account disabled status???
} else {
// db access failed
$_SESSION["errorMessage"] = $lang_err_database;
$userDetails["status"] = 0;
}
} else {
// db access failed
$_SESSION["errorMessage"] = $lang_err_database;
$userDetails["status"] = 0;
}
} else {
// authentication failed
$userDetails["status"] = 0;
}
return $userDetails;
}
/**
* Logs the user out of the application
*
* @param int the ID of user logging out
* @param string the user's sessionID
*/
function logout($userID, $sessionID) {
// remove session from db
Session::destroy($sessionID);
}
/**
* [Abstract] Checks the user's password
*
* @param string the name of the user to check
* @param string the password to check
* @return boolean true if the password is correct, else false
*/
function checkPassword($userName, $password) {
}
}
?>