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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Special setting for auth_shibboleth convert_data.
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*
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* @package auth_shibboleth
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* @copyright 2020 Mihail Geshoski
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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/**
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* Admin settings class for the convert_data option.
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*
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* @package auth_shibboleth
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* @copyright 2020 Mihail Geshoski
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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class auth_shibboleth_admin_setting_convert_data extends admin_setting_configfile {
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/**
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* Constructor.
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*
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* @param string $name
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* @param string $visiblename
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* @param string $description
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* @param mixed $defaultdirectory
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*/
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public function __construct($name, $visiblename, $description, $defaultdirectory) {
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parent::__construct($name, $visiblename, $description, $defaultdirectory);
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}
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/**
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* Validate the file path (location).
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*
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* This method ensures that the file defined as a data modification API exists and is not located in the site
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* data directory ($CFG->dataroot). We should prohibit using files from the site data directory as this introduces
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* security vulnerabilities.
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*
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* @param string $filepath The path to the file.
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* @return mixed bool true for success or string:error on failure.
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*/
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public function validate($filepath) {
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global $CFG;
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if (empty($filepath)) {
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return true;
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}
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// Fail if the file does not exist or it is not readable by the webserver process.
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if (!is_readable($filepath)) {
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return get_string('auth_shib_convert_data_warning', 'auth_shibboleth');
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}
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// Fail if the absolute file path matches the currently defined dataroot path.
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if (preg_match('/' . preg_quote($CFG->dataroot, '/') . '/', realpath($filepath))) {
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return get_string('auth_shib_convert_data_filepath_warning', 'auth_shibboleth');
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}
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return true;
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}
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}
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