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Differences Between: [Versions 310 and 311]

   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   * Redirect the user to registration with token and openid config url as query params.
  19   *
  20   * @package mod_lti
  21   * @copyright  2020 Cengage
  22   * @author     Claude Vervoort
  23   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24   */
  25  
  26  use Firebase\JWT\JWT;
  27  
  28  use mod_lti\local\ltiopenid\jwks_helper;
  29  use mod_lti\local\ltiopenid\registration_helper;
  30  
  31  require_once(__DIR__ . '/../../config.php');
  32  require_once($CFG->libdir.'/weblib.php');
  33  require_once($CFG->dirroot . '/mod/lti/locallib.php');
  34  
  35  require_login();
  36  $context = context_system::instance();
  37  require_capability('moodle/site:config', $context);
  38  
  39  $starturl = required_param('url', PARAM_URL);
  40  $typeid = optional_param('type', -1, PARAM_INT);
  41  
  42  $types = lti_get_tools_by_url($starturl, null);
  43  
  44  if (!empty($types) && $typeid == -1) {
  45      // There are matching types for the registration domain, let's prompt the user to upgrade.
  46      $pageurl = new moodle_url('/mod/lti/startltiadvregistration.php');
  47      $PAGE->set_context($context);
  48      $PAGE->set_url($pageurl);
  49      $PAGE->set_pagelayout('maintenance');
  50      $output = $PAGE->get_renderer('mod_lti');
  51      $page = new \mod_lti\output\registration_upgrade_choice_page($types, $starturl);
  52      echo $output->header();
  53      echo $output->render($page);
  54      echo $output->footer();
  55  } else {
  56      // Let's actually start the registration process by launching the tool registration
  57      // endpoint with the registration token and the site config url.
  58      require_sesskey();
  59      $sub = registration_helper::get()->new_clientid();
  60      $scope = registration_helper::REG_TOKEN_OP_NEW_REG;
  61      if ($typeid > 0) {
  62          // In the context of an update, the sub is the id of the type.
  63          $sub = strval($typeid);
  64          $scope = registration_helper::REG_TOKEN_OP_UPDATE_REG;
  65      }
  66      $now = time();
  67      $token = [
  68          "sub" => $sub,
  69          "scope" => $scope,
  70          "iat" => $now,
  71          "exp" => $now + HOURSECS
  72      ];
  73      $privatekey = jwks_helper::get_private_key();
  74      $regtoken = JWT::encode($token, $privatekey['key'], 'RS256', $privatekey['kid']);
  75      $confurl = new moodle_url('/mod/lti/openid-configuration.php');
  76      $url = new moodle_url($starturl);
  77      $url->param('openid_configuration', $confurl->out(false));
  78      $url->param('registration_token', $regtoken);
  79      header("Location: ".$url->out(false));
  80  }