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Differences Between: [Versions 311 and 401] [Versions 311 and 402] [Versions 311 and 403]

   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   * Tool proxy.
  19   *
  20   * @package    enrol_lti
  21   * @copyright  2016 John Okely <john@moodle.com>
  22   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  require_once(__DIR__ . '/../../config.php');
  26  
  27  $toolid = null;
  28  $token = null;
  29  $filearguments = get_file_argument();
  30  $arguments = explode('/', trim($filearguments, '/'));
  31  if (count($arguments) == 2) {
  32      list($toolid, $token) = $arguments;
  33  }
  34  
  35  $toolid = optional_param('id', $toolid, PARAM_INT);
  36  $token = optional_param('token', $token, PARAM_ALPHANUM);
  37  
  38  $PAGE->set_context(context_system::instance());
  39  $url = new moodle_url('/enrol/lti/tp.php');
  40  $PAGE->set_url($url);
  41  $PAGE->set_pagelayout('popup');
  42  $PAGE->set_title(get_string('registration', 'enrol_lti'));
  43  
  44  // Only show the proxy if the token parameter is correct.
  45  // If we do not compare with a shared secret, someone could very easily
  46  // guess an id for the enrolment.
  47  if (!\enrol_lti\helper::verify_proxy_token($toolid, $token)) {
  48      throw new \moodle_exception('incorrecttoken', 'enrol_lti');
  49  }
  50  $tool = \enrol_lti\helper::get_lti_tool($toolid);
  51  
  52  if (!is_enabled_auth('lti')) {
  53      print_error('pluginnotenabled', 'auth', '', get_string('pluginname', 'auth_lti'));
  54      exit();
  55  }
  56  
  57  // Check if the enrolment plugin is disabled.
  58  if (!enrol_is_enabled('lti')) {
  59      print_error('enrolisdisabled', 'enrol_lti');
  60      exit();
  61  }
  62  
  63  // Check if the enrolment instance is disabled.
  64  if ($tool->status != ENROL_INSTANCE_ENABLED) {
  65      print_error('enrolisdisabled', 'enrol_lti');
  66      exit();
  67  }
  68  
  69  $messagetype = required_param('lti_message_type', PARAM_TEXT);
  70  
  71  // Only accept proxy registration requests from this endpoint.
  72  if ($messagetype != "ToolProxyRegistrationRequest") {
  73      print_error('invalidrequest', 'enrol_lti');
  74      exit();
  75  }
  76  
  77  $toolprovider = new \enrol_lti\tool_provider($toolid);
  78  $toolprovider->handleRequest();
  79  echo $OUTPUT->header();
  80  echo $OUTPUT->footer();