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MDL-61351 auth_shibboleth: move new functions to separate class
This reduces the amount of code to an already confusing logout.php file and prevents conflicts if someone else happens to be using the same function name in a file.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,123 @@ | ||
| <?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/>. | ||
|
|
||
| /** | ||
| * Contains a helper class for the Shibboleth authentication plugin. | ||
| * | ||
| * @package auth_shibboleth | ||
| * @copyright 2018 Mark Nelson <markn@moodle.com> | ||
| * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later | ||
| */ | ||
|
|
||
| namespace auth_shibboleth; | ||
|
|
||
| defined('MOODLE_INTERNAL') || die(); | ||
|
|
||
| /** | ||
| * The helper class for the Shibboleth authentication plugin. | ||
| * | ||
| * @package auth_shibboleth | ||
| * @copyright 2018 Mark Nelson <markn@moodle.com> | ||
| * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later | ||
| */ | ||
| class helper { | ||
|
|
||
| /** | ||
| * Delete session of user using file sessions. | ||
| * | ||
| * @param string $spsessionid SP-provided Shibboleth Session ID | ||
| * @return \SoapFault or void if everything was fine | ||
| */ | ||
| public static function logout_file_session($spsessionid) { | ||
| global $CFG; | ||
|
|
||
| if (!empty($CFG->session_file_save_path)) { | ||
| $dir = $CFG->session_file_save_path; | ||
| } else { | ||
| $dir = $CFG->dataroot . '/sessions'; | ||
| } | ||
|
|
||
| if (is_dir($dir)) { | ||
| if ($dh = opendir($dir)) { | ||
| // Read all session files. | ||
| while (($file = readdir($dh)) !== false) { | ||
| // Check if it is a file. | ||
| if (is_file($dir.'/'.$file)) { | ||
| // Read session file data. | ||
| $data = file($dir.'/'.$file); | ||
| if (isset($data[0])) { | ||
| $usersession = self::unserializesession($data[0]); | ||
| // Check if we have found session that shall be deleted. | ||
| if (isset($usersession['SESSION']) && isset($usersession['SESSION']->shibboleth_session_id)) { | ||
| // If there is a match, delete file. | ||
| if ($usersession['SESSION']->shibboleth_session_id == $spsessionid) { | ||
| // Delete session file. | ||
| if (!unlink($dir.'/'.$file)) { | ||
| return new SoapFault('LogoutError', 'Could not delete Moodle session file.'); | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| closedir($dh); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Delete session of user using DB sessions. | ||
| * | ||
| * @param string $spsessionid SP-provided Shibboleth Session ID | ||
| */ | ||
| public static function logout_db_session($spsessionid) { | ||
| global $CFG, $DB; | ||
|
|
||
| $sessions = $DB->get_records_sql( | ||
| 'SELECT userid, sessdata FROM {sessions} WHERE timemodified > ?', | ||
| array(time() - $CFG->sessiontimeout) | ||
| ); | ||
|
|
||
| foreach ($sessions as $session) { | ||
| // Get user session from DB. | ||
| if (session_decode(base64_decode($session->sessdata))) { | ||
| if (isset($_SESSION['SESSION']) && isset($_SESSION['SESSION']->shibboleth_session_id)) { | ||
| // If there is a match, kill the session. | ||
| if ($_SESSION['SESSION']->shibboleth_session_id == trim($spsessionid)) { | ||
| // Delete this user's sessions. | ||
| \core\session\manager::kill_user_sessions($session->userid); | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Unserialize a session string. | ||
| * | ||
| * @param string $serializedstring | ||
| * @return array | ||
| */ | ||
| private static function unserializesession($serializedstring) { | ||
| $variables = array(); | ||
| $a = preg_split("/(\w+)\|/", $serializedstring, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE); | ||
| $counta = count($a); | ||
| for ($i = 0; $i < $counta; $i = $i + 2) { | ||
| $variables[$a[$i]] = unserialize($a[$i + 1]); | ||
| } | ||
| return $variables; | ||
| } | ||
| } |
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