Proyectos de Subversion Moodle

<?php

// This file is part of Moodle - http://moodle.org/

//

// Moodle is free software: you can redistribute it and/or modify

// it under the terms of the GNU General Public License as published by

// the Free Software Foundation, either version 3 of the License, or

// (at your option) any later version.

//

// Moodle is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

//

// You should have received a copy of the GNU General Public License

// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**

 * Redirect the user to registration with token and openid config url as query params.

 *

 * @package mod_lti

 * @copyright  2020 Cengage

 * @author     Claude Vervoort

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

use Firebase\JWT\JWT;

use mod_lti\local\ltiopenid\jwks_helper;

use mod_lti\local\ltiopenid\registration_helper;

require_once(__DIR__ . '/../../config.php');

require_once($CFG->libdir.'/weblib.php');

require_once($CFG->dirroot . '/mod/lti/locallib.php');

require_login();

$context = context_system::instance();

require_capability('moodle/site:config', $context);

$starturl = required_param('url', PARAM_URL);

$typeid = optional_param('type', -1, PARAM_INT);

$types = lti_get_tools_by_url($starturl, null);

if (!empty($types) && $typeid == -1) {

    // There are matching types for the registration domain, let's prompt the user to upgrade.

    $pageurl = new moodle_url('/mod/lti/startltiadvregistration.php');

    $PAGE->set_context($context);

    $PAGE->set_url($pageurl);

    $PAGE->set_pagelayout('maintenance');

    $output = $PAGE->get_renderer('mod_lti');

    $page = new \mod_lti\output\registration_upgrade_choice_page($types, $starturl);

    echo $output->header();

    echo $output->render($page);

    echo $output->footer();

} else {

    // Let's actually start the registration process by launching the tool registration

    // endpoint with the registration token and the site config url.

    require_sesskey();

    $sub = registration_helper::get()->new_clientid();

    $scope = registration_helper::REG_TOKEN_OP_NEW_REG;

    if ($typeid > 0) {

        // In the context of an update, the sub is the id of the type.

        $sub = strval($typeid);

        $scope = registration_helper::REG_TOKEN_OP_UPDATE_REG;

    }

    $now = time();

    $token = [

        "sub" => $sub,

        "scope" => $scope,

        "iat" => $now,

        "exp" => $now + HOURSECS

    ];

    $privatekey = jwks_helper::get_private_key();

    $regtoken = JWT::encode($token, $privatekey['key'], 'RS256', $privatekey['kid']);

    $confurl = new moodle_url('/mod/lti/openid-configuration.php');

    $url = new moodle_url($starturl);

    $url->param('openid_configuration', $confurl->out(false));

    $url->param('registration_token', $regtoken);

    header("Location: ".$url->out(false));

}