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<?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/>.
/**
* Special setting for auth_shibboleth convert_data.
*
* @package auth_shibboleth
* @copyright 2020 Mihail Geshoski
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
/**
* Admin settings class for the convert_data option.
*
* @package auth_shibboleth
* @copyright 2020 Mihail Geshoski
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class auth_shibboleth_admin_setting_convert_data extends admin_setting_configfile {
/**
* Constructor.
*
* @param string $name
* @param string $visiblename
* @param string $description
* @param mixed $defaultdirectory
*/
public function __construct($name, $visiblename, $description, $defaultdirectory) {
parent::__construct($name, $visiblename, $description, $defaultdirectory);
}
/**
* Validate the file path (location).
*
* This method ensures that the file defined as a data modification API exists and is not located in the site
* data directory ($CFG->dataroot). We should prohibit using files from the site data directory as this introduces
* security vulnerabilities.
*
* @param string $filepath The path to the file.
* @return mixed bool true for success or string:error on failure.
*/
public function validate($filepath) {
global $CFG;
if (empty($filepath)) {
return true;
}
// Fail if the file does not exist or it is not readable by the webserver process.
if (!is_readable($filepath)) {
return get_string('auth_shib_convert_data_warning', 'auth_shibboleth');
}
// Fail if the absolute file path matches the currently defined dataroot path.
if (preg_match('/' . preg_quote($CFG->dataroot, '/') . '/', realpath($filepath))) {
return get_string('auth_shib_convert_data_filepath_warning', 'auth_shibboleth');
}
return true;
}
}