3 * @copyright Copyright (C) 2010-2022, the Friendica project
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;
25 use Friendica\BaseModule;
26 use Friendica\Core\L10n;
27 use Friendica\Core\System;
28 use Friendica\Database\Database;
29 use Friendica\Model\Contact;
30 use Friendica\Model\User;
31 use Friendica\Network\HTTPClient\Capability\ICanSendHttpRequests;
32 use Friendica\Network\HTTPClient\Client\HttpClientOptions;
33 use Friendica\Util\HTTPSignature;
34 use Friendica\Util\Profiler;
35 use Friendica\Util\Strings;
36 use Psr\Log\LoggerInterface;
39 * Magic Auth (remote authentication) module.
41 * Ported from Hubzilla: https://framagit.org/hubzilla/core/blob/master/Zotlabs/Module/Magic.php
43 class Magic extends BaseModule
49 /** @var ICanSendHttpRequests */
50 protected $httpClient;
52 public function __construct(App $app, L10n $l10n, App\BaseURL $baseUrl, App\Arguments $args, LoggerInterface $logger, Profiler $profiler, Response $response, Database $dba, ICanSendHttpRequests $httpClient, array $server, array $parameters = [])
54 parent::__construct($l10n, $baseUrl, $args, $logger, $profiler, $response, $server, $parameters);
58 $this->httpClient = $httpClient;
61 protected function rawContent(array $request = [])
63 $this->logger->info('magic module: invoked');
65 $this->logger->debug('args', ['request' => $_REQUEST]);
67 $addr = $_REQUEST['addr'] ?? '';
68 $dest = $_REQUEST['dest'] ?? '';
69 $owa = (!empty($_REQUEST['owa']) ? intval($_REQUEST['owa']) : 0);
73 $cid = Contact::getIdForURL($addr);
74 } elseif (!empty($dest)) {
75 $cid = Contact::getIdForURL($dest);
79 $this->logger->info('No contact record found', $_REQUEST);
80 // @TODO Finding a more elegant possibility to redirect to either internal or external URL
81 $this->app->redirect($dest);
83 $contact = $this->dba->selectFirst('contact', ['id', 'nurl', 'url'], ['id' => $cid]);
85 // Redirect if the contact is already authenticated on this site.
86 if ($this->app->getContactId() && strpos($contact['nurl'], Strings::normaliseLink($this->baseUrl->get())) !== false) {
87 $this->logger->info('Contact is already authenticated');
88 System::externalRedirect($dest);
92 if (local_user() && $owa) {
93 $user = User::getById(local_user());
95 // Extract the basepath
96 // NOTE: we need another solution because this does only work
97 // for friendica contacts :-/ . We should have the basepath
98 // of a contact also in the contact table.
99 $exp = explode('/profile/', $contact['url']);
103 'Accept' => ['application/x-dfrn+json', 'application/x-zot+json'],
104 'X-Open-Web-Auth' => [Strings::getRandomHex()],
107 // Create a header that is signed with the local users private key.
108 $header = HTTPSignature::createSig(
111 'acct:' . $user['nickname'] . '@' . $this->baseUrl->getHostname() . ($this->baseUrl->getUrlPath() ? '/' . $this->baseUrl->getUrlPath() : '')
114 // Try to get an authentication token from the other instance.
115 $curlResult = $this->httpClient->get($basepath . '/owa', [HttpClientOptions::HEADERS => $header]);
117 if ($curlResult->isSuccess()) {
118 $j = json_decode($curlResult->getBody(), true);
122 if ($j['encrypted_token']) {
123 // The token is encrypted. If the local user is really the one the other instance
124 // thinks he/she is, the token can be decrypted with the local users public key.
125 openssl_private_decrypt(Strings::base64UrlDecode($j['encrypted_token']), $token, $user['prvkey']);
127 $token = $j['token'];
129 $args = (strpbrk($dest, '?&') ? '&' : '?') . 'owt=' . $token;
131 $this->logger->info('Redirecting', ['path' => $dest . $args]);
132 System::externalRedirect($dest . $args);
135 System::externalRedirect($dest);
138 // @TODO Finding a more elegant possibility to redirect to either internal or external URL
139 $this->app->redirect($dest);