Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
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<?php
/**
* @file src/Module/Magic.php
*/
namespace Friendica\Module;
use Friendica\BaseModule;
use Friendica\Core\Logger;
use Friendica\Core\System;
use Friendica\Database\DBA;
use Friendica\DI;
use Friendica\Model\Contact;
use Friendica\Util\HTTPSignature;
use Friendica\Util\Network;
use Friendica\Util\Strings;
/**
* Magic Auth (remote authentication) module.
*
* Ported from Hubzilla: https://framagit.org/hubzilla/core/blob/master/Zotlabs/Module/Magic.php
*/
class Magic extends BaseModule
{
public static function init(array $parameters = [])
{
$a = DI::app();
$ret = ['success' => false, 'url' => '', 'message' => ''];
Logger::log('magic mdule: invoked', Logger::DEBUG);
Logger::log('args: ' . print_r($_REQUEST, true), Logger::DATA);
$addr = $_REQUEST['addr'] ?? '';
$dest = $_REQUEST['dest'] ?? '';
$test = (!empty($_REQUEST['test']) ? intval($_REQUEST['test']) : 0);
$owa = (!empty($_REQUEST['owa']) ? intval($_REQUEST['owa']) : 0);
$cid = 0;
if (!empty($addr)) {
$cid = Contact::getIdForURL($addr);
} elseif (!empty($dest)) {
$cid = Contact::getIdForURL($dest);
}
if (!$cid) {
Logger::info('No contact record found', $_REQUEST);
// @TODO Finding a more elegant possibility to redirect to either internal or external URL
$a->redirect($dest);
}
$contact = DBA::selectFirst('contact', ['id', 'nurl', 'url'], ['id' => $cid]);
// Redirect if the contact is already authenticated on this site.
if (!empty($a->contact) && array_key_exists('id', $a->contact) && strpos($contact['nurl'], Strings::normaliseLink(DI::baseUrl()->get())) !== false) {
if ($test) {
$ret['success'] = true;
$ret['message'] .= 'Local site - you are already authenticated.' . EOL;
return $ret;
}
Logger::log('Contact is already authenticated', Logger::DEBUG);
System::externalRedirect($dest);
}
if (local_user()) {
$user = $a->user;
// OpenWebAuth
if ($owa) {
// Extract the basepath
// NOTE: we need another solution because this does only work
// for friendica contacts :-/ . We should have the basepath
// of a contact also in the contact table.
$exp = explode('/profile/', $contact['url']);
$basepath = $exp[0];
$headers = [];
$headers['Accept'] = 'application/x-dfrn+json, application/x-zot+json';
$headers['X-Open-Web-Auth'] = Strings::getRandomHex();
// Create a header that is signed with the local users private key.
$headers = HTTPSignature::createSig(
$headers,
$user['prvkey'],
'acct:' . $user['nickname'] . '@' . DI::baseUrl()->getHostname() . (DI::baseUrl()->getUrlPath() ? '/' . DI::baseUrl()->getUrlPath() : '')
);
// Try to get an authentication token from the other instance.
$curlResult = Network::curl($basepath . '/owa', false, ['headers' => $headers]);
if ($curlResult->isSuccess()) {
$j = json_decode($curlResult->getBody(), true);
if ($j['success']) {
$token = '';
if ($j['encrypted_token']) {
// The token is encrypted. If the local user is really the one the other instance
// thinks he/she is, the token can be decrypted with the local users public key.
openssl_private_decrypt(Strings::base64UrlDecode($j['encrypted_token']), $token, $user['prvkey']);
} else {
$token = $j['token'];
}
$args = (strpbrk($dest, '?&') ? '&' : '?') . 'owt=' . $token;
Logger::info('Redirecting', ['path' => $dest . $args]);
System::externalRedirect($dest . $args);
}
}
System::externalRedirect($dest);
}
}
if ($test) {
$ret['message'] = 'Not authenticated or invalid arguments' . EOL;
return $ret;
}
// @TODO Finding a more elegant possibility to redirect to either internal or external URL
$a->redirect($dest);
}
}