login/token.php

   1 <?php
   2 // This file is part of Moodle - http://moodle.org/
   3 //
   4 // Moodle is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation, either version 3 of the License, or
   7 // (at your option) any later version.
   8 //
   9 // Moodle is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU General Public License
  15 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 /**
  18  * Return token
  19  * @package    moodlecore
  20  * @copyright  2011 Dongsheng Cai <dongsheng@moodle.com>
  21  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  22  */
  23
  24 define('AJAX_SCRIPT', true);
  25 define('REQUIRE_CORRECT_ACCESS', true);
  26 define('NO_MOODLE_COOKIES', true);
  27
  28 require_once(__DIR__ . '/../config.php');
  29 require_once($CFG->libdir . '/externallib.php');
  30
  31 // Allow CORS requests.
  32 header('Access-Control-Allow-Origin: *');
  33
  34 $username = required_param('username', PARAM_USERNAME);
  35 $password = required_param('password', PARAM_RAW);
  36 $serviceshortname  = required_param('service',  PARAM_ALPHANUMEXT);
  37
  38 echo $OUTPUT->header();
  39
  40 if (!$CFG->enablewebservices) {
  41     throw new moodle_exception('enablewsdescription', 'webservice');
  42 }
  43 $username = trim(core_text::strtolower($username));
  44 if (is_restored_user($username)) {
  45     throw new moodle_exception('restoredaccountresetpassword', 'webservice');
  46 }
  47
  48 $systemcontext = context_system::instance();
  49
  50 $reason = null;
  51 $user = authenticate_user_login($username, $password, false, $reason, false);
  52 if (!empty($user)) {
  53
  54     // Cannot authenticate unless maintenance access is granted.
  55     $hasmaintenanceaccess = has_capability('moodle/site:maintenanceaccess', $systemcontext, $user);
  56     if (!empty($CFG->maintenance_enabled) and !$hasmaintenanceaccess) {
  57         throw new moodle_exception('sitemaintenance', 'admin');
  58     }
  59
  60     if (isguestuser($user)) {
  61         throw new moodle_exception('noguest');
  62     }
  63     if (empty($user->confirmed)) {
  64         throw new moodle_exception('usernotconfirmed', 'moodle', '', $user->username);
  65     }
  66     // check credential expiry
  67     $userauth = get_auth_plugin($user->auth);
  68     if (!empty($userauth->config->expiration) and $userauth->config->expiration == 1) {
  69         $days2expire = $userauth->password_expire($user->username);
  70         if (intval($days2expire) < 0 ) {
  71             throw new moodle_exception('passwordisexpired', 'webservice');
  72         }
  73     }
  74
  75     // let enrol plugins deal with new enrolments if necessary
  76     enrol_check_plugins($user);
  77
  78     // setup user session to check capability
  79     \core\session\manager::set_user($user);
  80
  81     //check if the service exists and is enabled
  82     $service = $DB->get_record('external_services', array('shortname' => $serviceshortname, 'enabled' => 1));
  83     if (empty($service)) {
  84         // will throw exception if no token found
  85         throw new moodle_exception('servicenotavailable', 'webservice');
  86     }
  87
  88     // Get an existing token or create a new one.
  89     $token = external_generate_token_for_current_user($service);
  90     $privatetoken = $token->privatetoken;
  91     external_log_token_request($token);
  92
  93     $siteadmin = has_capability('moodle/site:config', $systemcontext, $USER->id);
  94
  95     $usertoken = new stdClass;
  96     $usertoken->token = $token->token;
  97     // Private token, only transmitted to https sites and non-admin users.
  98     if (is_https() and !$siteadmin) {
  99         $usertoken->privatetoken = $privatetoken;
 100     } else {
 101         $usertoken->privatetoken = null;
 102     }
 103     echo json_encode($usertoken);
 104 } else {
 105     throw new moodle_exception('invalidlogin');
 106 }