3 * @copyright Copyright (C) 2020, Friendica
5 * @license GNU AGPL version 3 or any later version
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU Affero General Public License as
9 * published by the Free Software Foundation, either version 3 of the
10 * License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU Affero General Public License for more details.
17 * You should have received a copy of the GNU Affero General Public License
18 * along with this program. If not, see <https://www.gnu.org/licenses/>.
22 namespace Friendica\Module;
24 use Friendica\BaseModule;
25 use Friendica\Core\Logger;
26 use Friendica\Core\System;
27 use Friendica\Database\DBA;
29 use Friendica\Model\Contact;
30 use Friendica\Util\HTTPSignature;
31 use Friendica\Util\Network;
32 use Friendica\Util\Strings;
35 * Magic Auth (remote authentication) module.
37 * Ported from Hubzilla: https://framagit.org/hubzilla/core/blob/master/Zotlabs/Module/Magic.php
39 class Magic extends BaseModule
41 public static function init(array $parameters = [])
44 $ret = ['success' => false, 'url' => '', 'message' => ''];
45 Logger::log('magic mdule: invoked', Logger::DEBUG);
47 Logger::log('args: ' . print_r($_REQUEST, true), Logger::DATA);
49 $addr = $_REQUEST['addr'] ?? '';
50 $dest = $_REQUEST['dest'] ?? '';
51 $test = (!empty($_REQUEST['test']) ? intval($_REQUEST['test']) : 0);
52 $owa = (!empty($_REQUEST['owa']) ? intval($_REQUEST['owa']) : 0);
56 $cid = Contact::getIdForURL($addr);
57 } elseif (!empty($dest)) {
58 $cid = Contact::getIdForURL($dest);
62 Logger::info('No contact record found', $_REQUEST);
63 // @TODO Finding a more elegant possibility to redirect to either internal or external URL
66 $contact = DBA::selectFirst('contact', ['id', 'nurl', 'url'], ['id' => $cid]);
68 // Redirect if the contact is already authenticated on this site.
69 if (!empty($a->contact) && array_key_exists('id', $a->contact) && strpos($contact['nurl'], Strings::normaliseLink(DI::baseUrl()->get())) !== false) {
71 $ret['success'] = true;
72 $ret['message'] .= 'Local site - you are already authenticated.' . EOL;
76 Logger::log('Contact is already authenticated', Logger::DEBUG);
77 System::externalRedirect($dest);
85 // Extract the basepath
86 // NOTE: we need another solution because this does only work
87 // for friendica contacts :-/ . We should have the basepath
88 // of a contact also in the contact table.
89 $exp = explode('/profile/', $contact['url']);
93 $headers['Accept'] = 'application/x-dfrn+json, application/x-zot+json';
94 $headers['X-Open-Web-Auth'] = Strings::getRandomHex();
96 // Create a header that is signed with the local users private key.
97 $headers = HTTPSignature::createSig(
100 'acct:' . $user['nickname'] . '@' . DI::baseUrl()->getHostname() . (DI::baseUrl()->getUrlPath() ? '/' . DI::baseUrl()->getUrlPath() : '')
103 // Try to get an authentication token from the other instance.
104 $curlResult = Network::curl($basepath . '/owa', false, ['headers' => $headers]);
106 if ($curlResult->isSuccess()) {
107 $j = json_decode($curlResult->getBody(), true);
111 if ($j['encrypted_token']) {
112 // The token is encrypted. If the local user is really the one the other instance
113 // thinks he/she is, the token can be decrypted with the local users public key.
114 openssl_private_decrypt(Strings::base64UrlDecode($j['encrypted_token']), $token, $user['prvkey']);
116 $token = $j['token'];
118 $args = (strpbrk($dest, '?&') ? '&' : '?') . 'owt=' . $token;
120 Logger::info('Redirecting', ['path' => $dest . $args]);
121 System::externalRedirect($dest . $args);
124 System::externalRedirect($dest);
129 $ret['message'] = 'Not authenticated or invalid arguments' . EOL;
133 // @TODO Finding a more elegant possibility to redirect to either internal or external URL