95 lines
3.1 KiB
PHP
95 lines
3.1 KiB
PHP
<?php
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// Require login for admin access
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// Author: Keyvan Minoukadeh
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// Copyright (c) 2012 Keyvan Minoukadeh
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// License: AGPLv3
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// Date: 2012-08-30
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// More info: http://fivefilters.org/content-only/
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// Help: http://help.fivefilters.org
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/*
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero 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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This program 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 Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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// Usage
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// -----
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// This file is included on pages which require admin privileges - e.g. updating the software.
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// The username is 'admin' by default and the password should be set in the custom_config.php file.
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session_start();
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require_once(dirname(dirname(__FILE__)).'/config.php');
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if (isset($_GET['logout'])) $_SESSION['auth'] = 0;
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if (!isset($_SESSION['auth']) || $_SESSION['auth'] != 1) {
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if (isset($admin_page)) {
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header('Location: login.php?redirect='.$admin_page);
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} else {
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header('Location: login.php');
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}
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exit;
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}
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/* HTTP DIGEST authentication - doesn't work without server tweaks in FastCGI environments
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$realm = 'Restricted area';
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//user => password
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$users = array($options->admin_credentials['username'] => $options->admin_credentials['password']);
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if (empty($_SERVER['PHP_AUTH_DIGEST'])) {
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header('HTTP/1.1 401 Unauthorized');
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header('WWW-Authenticate: Digest realm="'.$realm.
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'",qop="auth",nonce="'.uniqid().'",opaque="'.md5($realm).'"');
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die('If you can\'t remember your admin credentials, open your custom_config.php and you\'ll find them in there.');
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}
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// analyze the PHP_AUTH_DIGEST variable
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if (!($data = http_digest_parse($_SERVER['PHP_AUTH_DIGEST'])) ||
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!isset($users[$data['username']]))
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die('Wrong credentials!');
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// generate the valid response
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$A1 = md5($data['username'] . ':' . $realm . ':' . $users[$data['username']]);
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$A2 = md5($_SERVER['REQUEST_METHOD'].':'.$data['uri']);
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$valid_response = md5($A1.':'.$data['nonce'].':'.$data['nc'].':'.$data['cnonce'].':'.$data['qop'].':'.$A2);
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if ($data['response'] != $valid_response)
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die('Wrong credentials!');
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// ok, valid username & password
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// echo 'Thanks! You are now logged in.';
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unset($realm, $users, $data, $A1, $A2, $valid_response);
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// function to parse the http auth header
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function http_digest_parse($txt)
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{
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// protect against missing data
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$needed_parts = array('nonce'=>1, 'nc'=>1, 'cnonce'=>1, 'qop'=>1, 'username'=>1, 'uri'=>1, 'response'=>1);
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$data = array();
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$keys = implode('|', array_keys($needed_parts));
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preg_match_all('@(' . $keys . ')=(?:([\'"])([^\2]+?)\2|([^\s,]+))@', $txt, $matches, PREG_SET_ORDER);
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foreach ($matches as $m) {
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$data[$m[1]] = $m[3] ? $m[3] : $m[4];
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unset($needed_parts[$m[1]]);
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}
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return $needed_parts ? false : $data;
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}
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*/
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?>
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