. /** * Main login page. * * @package core * @subpackage auth * @copyright 1999 onwards Martin Dougiamas http://dougiamas.com * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later */ require('../config.php'); require_once('lib.php'); redirect_if_major_upgrade_required(); $testsession = optional_param('testsession', 0, PARAM_INT); // test session works properly $anchor = optional_param('anchor', '', PARAM_RAW); // Used to restore hash anchor to wantsurl. $context = context_system::instance(); $PAGE->set_url("$CFG->wwwroot/login/index.php"); $PAGE->set_context($context); $PAGE->set_pagelayout('login'); /// Initialize variables $errormsg = ''; $errorcode = 0; // login page requested session test if ($testsession) { if ($testsession == $USER->id) { if (isset($SESSION->wantsurl)) { $urltogo = $SESSION->wantsurl; } else { $urltogo = $CFG->wwwroot.'/'; } unset($SESSION->wantsurl); redirect($urltogo); } else { // TODO: try to find out what is the exact reason why sessions do not work $errormsg = get_string("cookiesnotenabled"); $errorcode = 1; } } /// Check for timed out sessions if (!empty($SESSION->has_timed_out)) { $session_has_timed_out = true; unset($SESSION->has_timed_out); } else { $session_has_timed_out = false; } /// auth plugins may override these - SSO anyone? $frm = false; $user = false; $authsequence = get_enabled_auth_plugins(true); // auths, in sequence foreach($authsequence as $authname) { $authplugin = get_auth_plugin($authname); $authplugin->loginpage_hook(); } /// Define variables used in page $site = get_site(); // Ignore any active pages in the navigation/settings. // We do this because there won't be an active page there, and by ignoring the active pages the // navigation and settings won't be initialised unless something else needs them. $PAGE->navbar->ignore_active(); $loginsite = get_string("loginsite"); $PAGE->navbar->add($loginsite); if ($user !== false or $frm !== false or $errormsg !== '') { // some auth plugin already supplied full user, fake form data or prevented user login with error message } else if (!empty($SESSION->wantsurl) && file_exists($CFG->dirroot.'/login/weblinkauth.php')) { // Handles the case of another Moodle site linking into a page on this site //TODO: move weblink into own auth plugin include($CFG->dirroot.'/login/weblinkauth.php'); if (function_exists('weblink_auth')) { $user = weblink_auth($SESSION->wantsurl); } if ($user) { $frm->username = $user->username; } else { $frm = data_submitted(); } } else { $frm = data_submitted(); } // Restore the #anchor to the original wantsurl. Note that this // will only work for internal auth plugins, SSO plugins such as // SAML / CAS / OIDC will have to handle this correctly directly. if ($anchor && isset($SESSION->wantsurl) && strpos($SESSION->wantsurl, '#') === false) { $wantsurl = new moodle_url($SESSION->wantsurl); $wantsurl->set_anchor(substr($anchor, 1)); $SESSION->wantsurl = $wantsurl->out(); } /// Check if the user has actually submitted login data to us if ($frm and isset($frm->username)) { // Login WITH cookies $frm->username = trim(core_text::strtolower($frm->username)); if (is_enabled_auth('none') ) { if ($frm->username !== core_user::clean_field($frm->username, 'username')) { $errormsg = get_string('username').': '.get_string("invalidusername"); $errorcode = 2; $user = null; } } if ($user) { //user already supplied by aut plugin prelogin hook } else if (($frm->username == 'guest') and empty($CFG->guestloginbutton)) { $user = false; /// Can't log in as guest if guest button is disabled $frm = false; } else { if (empty($errormsg)) { $user = authenticate_user_login($frm->username, $frm->password, false, $errorcode); } } // Intercept 'restored' users to provide them with info & reset password if (!$user and $frm and is_restored_user($frm->username)) { $PAGE->set_title(get_string('restoredaccount')); $PAGE->set_heading($site->fullname); echo $OUTPUT->header(); echo $OUTPUT->heading(get_string('restoredaccount')); echo $OUTPUT->box(get_string('restoredaccountinfo'), 'generalbox boxaligncenter'); require_once('restored_password_form.php'); // Use our "supplanter" login_forgot_password_form. MDL-20846 $form = new login_forgot_password_form('forgot_password.php', array('username' => $frm->username)); $form->display(); echo $OUTPUT->footer(); die; } if ($user) { // language setup if (isguestuser($user)) { // no predefined language for guests - use existing session or default site lang unset($user->lang); } else if (!empty($user->lang)) { // unset previous session language - use user preference instead unset($SESSION->lang); } if (empty($user->confirmed)) { // This account was never confirmed $PAGE->set_title(get_string("mustconfirm")); $PAGE->set_heading($site->fullname); echo $OUTPUT->header(); echo $OUTPUT->heading(get_string("mustconfirm")); echo $OUTPUT->box(get_string("emailconfirmsent", "", $user->email), "generalbox boxaligncenter"); echo $OUTPUT->footer(); die; } /// Let's get them all set up. complete_user_login($user); \core\session\manager::apply_concurrent_login_limit($user->id, session_id()); // sets the username cookie if (!empty($CFG->nolastloggedin)) { // do not store last logged in user in cookie // auth plugins can temporarily override this from loginpage_hook() // do not save $CFG->nolastloggedin in database! } else if (empty($CFG->rememberusername) or ($CFG->rememberusername == 2 and empty($frm->rememberusername))) { // no permanent cookies, delete old one if exists set_moodle_cookie(''); } else { set_moodle_cookie($USER->username); } $urltogo = core_login_get_return_url(); /// check if user password has expired /// Currently supported only for ldap-authentication module $userauth = get_auth_plugin($USER->auth); if (!isguestuser() and !empty($userauth->config->expiration) and $userauth->config->expiration == 1) { $externalchangepassword = false; if ($userauth->can_change_password()) { $passwordchangeurl = $userauth->change_password_url(); if (!$passwordchangeurl) { $passwordchangeurl = $CFG->wwwroot.'/login/change_password.php'; } else { $externalchangepassword = true; } } else { $passwordchangeurl = $CFG->wwwroot.'/login/change_password.php'; } $days2expire = $userauth->password_expire($USER->username); $PAGE->set_title("$site->fullname: $loginsite"); $PAGE->set_heading("$site->fullname"); if (intval($days2expire) > 0 && intval($days2expire) < intval($userauth->config->expiration_warning)) { echo $OUTPUT->header(); echo $OUTPUT->confirm(get_string('auth_passwordwillexpire', 'auth', $days2expire), $passwordchangeurl, $urltogo); echo $OUTPUT->footer(); exit; } elseif (intval($days2expire) < 0 ) { if ($externalchangepassword) { // We end the session if the change password form is external. This prevents access to the site // until the password is correctly changed. require_logout(); } else { // If we use the standard change password form, this user preference will be reset when the password // is changed. Until then it will prevent access to the site. set_user_preference('auth_forcepasswordchange', 1, $USER); } echo $OUTPUT->header(); echo $OUTPUT->confirm(get_string('auth_passwordisexpired', 'auth'), $passwordchangeurl, $urltogo); echo $OUTPUT->footer(); exit; } } // Discard any errors before the last redirect. unset($SESSION->loginerrormsg); // test the session actually works by redirecting to self $SESSION->wantsurl = $urltogo; redirect(new moodle_url(get_login_url(), array('testsession'=>$USER->id))); } else { if (empty($errormsg)) { if ($errorcode == AUTH_LOGIN_UNAUTHORISED) { $errormsg = get_string("unauthorisedlogin", "", $frm->username); } else { $errormsg = get_string("invalidlogin"); $errorcode = 3; } } } } /// Detect problems with timedout sessions if ($session_has_timed_out and !data_submitted()) { $errormsg = get_string('sessionerroruser', 'error'); $errorcode = 4; } /// First, let's remember where the user was trying to get to before they got here if (empty($SESSION->wantsurl)) { $SESSION->wantsurl = null; $referer = get_local_referer(false); if ($referer && $referer != $CFG->wwwroot && $referer != $CFG->wwwroot . '/' && $referer != $CFG->wwwroot . '/login/' && strpos($referer, $CFG->wwwroot . '/login/?') !== 0 && strpos($referer, $CFG->wwwroot . '/login/index.php') !== 0) { // There might be some extra params such as ?lang=. $SESSION->wantsurl = $referer; } } /// Redirect to alternative login URL if needed if (!empty($CFG->alternateloginurl)) { $loginurl = new moodle_url($CFG->alternateloginurl); $loginurlstr = $loginurl->out(false); if (strpos($SESSION->wantsurl, $loginurlstr) === 0) { // We do not want to return to alternate url. $SESSION->wantsurl = null; } // If error code then add that to url. if ($errorcode) { $loginurl->param('errorcode', $errorcode); } redirect($loginurl->out(false)); } /// Generate the login page with forms if (!isset($frm) or !is_object($frm)) { $frm = new stdClass(); } if (empty($frm->username) && $authsequence[0] != 'shibboleth') { // See bug 5184 if (!empty($_GET["username"])) { // we do not want data from _POST here $frm->username = clean_param($_GET["username"], PARAM_RAW); // we do not want data from _POST here } else { $frm->username = get_moodle_cookie(); } $frm->password = ""; } if (!empty($SESSION->loginerrormsg)) { // We had some errors before redirect, show them now. $errormsg = $SESSION->loginerrormsg; unset($SESSION->loginerrormsg); } else if ($testsession) { // No need to redirect here. unset($SESSION->loginerrormsg); } else if ($errormsg or !empty($frm->password)) { // We must redirect after every password submission. if ($errormsg) { $SESSION->loginerrormsg = $errormsg; } redirect(new moodle_url('/login/index.php')); } $PAGE->set_title("$site->fullname: $loginsite"); $PAGE->set_heading("$site->fullname"); echo $OUTPUT->header(); if (isloggedin() and !isguestuser()) { // prevent logging when already logged in, we do not want them to relogin by accident because sesskey would be changed echo $OUTPUT->box_start(); $logout = new single_button(new moodle_url('/login/logout.php', array('sesskey'=>sesskey(),'loginpage'=>1)), get_string('logout'), 'post'); $continue = new single_button(new moodle_url('/'), get_string('cancel'), 'get'); echo $OUTPUT->confirm(get_string('alreadyloggedin', 'error', fullname($USER)), $logout, $continue); echo $OUTPUT->box_end(); } else { $loginform = new \core_auth\output\login($authsequence, $frm->username); $loginform->set_error($errormsg); echo $OUTPUT->render($loginform); } echo $OUTPUT->footer();