149 lines
6.2 KiB
PHP
149 lines
6.2 KiB
PHP
<?php
|
|
// This file is part of GNU social - https://www.gnu.org/software/social
|
|
//
|
|
// GNU social is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Affero General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// GNU social 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 Affero General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Affero General Public License
|
|
// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
/**
|
|
* ActivityPub implementation for GNU social
|
|
*
|
|
* @package GNUsocial
|
|
*
|
|
* @author Diogo Cordeiro <diogo@fc.up.pt>
|
|
* @copyright 2018-2019 Free Software Foundation, Inc http://www.fsf.org
|
|
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
|
|
*
|
|
* @see http://www.gnu.org/software/social/
|
|
*/
|
|
defined('GNUSOCIAL') || die();
|
|
|
|
/**
|
|
* Inbox Request Handler
|
|
*
|
|
* @category Plugin
|
|
* @package GNUsocial
|
|
*
|
|
* @author Diogo Cordeiro <diogo@fc.up.pt>
|
|
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
|
|
*/
|
|
class apInboxAction extends ManagedAction
|
|
{
|
|
protected $needLogin = false;
|
|
protected $canPost = true;
|
|
|
|
/**
|
|
* Handle the Inbox request
|
|
*
|
|
* @throws ServerException
|
|
*
|
|
* @return void
|
|
*
|
|
* @author Diogo Cordeiro <diogo@fc.up.pt>
|
|
*/
|
|
protected function handle()
|
|
{
|
|
$path = !empty($this->trimmed('id')) ? common_local_url('apInbox', ['id' => $this->trimmed('id')]) : common_local_url('apInbox');
|
|
$path = parse_url($path, PHP_URL_PATH);
|
|
|
|
if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
|
|
ActivityPubReturn::error('Only POST requests allowed.');
|
|
}
|
|
|
|
common_debug('ActivityPub Inbox: Received a POST request.');
|
|
$body = $data = file_get_contents('php://input');
|
|
common_debug('ActivityPub Inbox: Request contents: ' . $data);
|
|
$data = json_decode(file_get_contents('php://input'), true);
|
|
|
|
if (!isset($data['actor'])) {
|
|
ActivityPubReturn::error('Actor not found in the request.');
|
|
}
|
|
|
|
try {
|
|
$actor = Activitypub_explorer::get_profile_from_url($data['actor']);
|
|
} catch (HTTP_Request2_Exception $e) {
|
|
ActivityPubReturn::error('Failed to retrieve remote actor information.');
|
|
} catch (NoProfileException $e) {
|
|
// Assert: This won't happen.
|
|
common_log(LOG_ERR, 'PLEASE REPORT THIS: ActivityPub Inbox Handler failed with NoProfileException while retrieving remote actor information: ' . $e->getMessage());
|
|
ActivityPubReturn::error('An unknown error has occurred. This was logged, please alert the sysadmin.');
|
|
} catch (ServerException $e) {
|
|
ActivityPubReturn::error('Could not store this remote actor.');
|
|
} catch (Exception $e) {
|
|
ActivityPubReturn::error('Invalid actor.');
|
|
}
|
|
try {
|
|
$aprofile = Activitypub_profile::from_profile($actor);
|
|
} catch (Exception $e) {
|
|
// Assert: This won't happen.
|
|
common_log(LOG_ERR, 'PLEASE REPORT THIS: ActivityPub Inbox Handler failed while retrieving AProfile from Profile: ' . $e->getMessage());
|
|
ActivityPubReturn::error('An unknown error has occurred. This was logged, please alert the sysadmin.');
|
|
}
|
|
|
|
$actor_public_key = new Activitypub_rsa();
|
|
$actor_public_key = $actor_public_key->ensure_public_key($actor);
|
|
|
|
common_debug('ActivityPub Inbox: HTTP Signature: Validation will now start!');
|
|
|
|
$headers = getallheaders();
|
|
common_debug('ActivityPub Inbox: Request Headers: ' . print_r($headers, true));
|
|
|
|
if (!isset($headers['Signature'])) {
|
|
common_debug('ActivityPub Inbox: HTTP Signature: Missing Signature header.');
|
|
ActivityPubReturn::error('Missing Signature header.', 400);
|
|
}
|
|
|
|
// Extract the signature properties
|
|
$signatureData = HTTPSignature::parseSignatureHeader($headers['Signature']);
|
|
common_debug('ActivityPub Inbox: HTTP Signature Data: ' . print_r($signatureData, true));
|
|
if (isset($signatureData['error'])) {
|
|
common_debug('ActivityPub Inbox: HTTP Signature: ' . json_encode($signatureData, true));
|
|
ActivityPubReturn::error(json_encode($signatureData, true), 400);
|
|
}
|
|
|
|
list($verified, /*$headers*/) = HTTPSignature::verify($actor_public_key, $signatureData, $headers, $path, $body);
|
|
|
|
// If the signature fails verification the first time, update profile as it might have changed public key
|
|
if ($verified !== 1) {
|
|
try {
|
|
$res = Activitypub_explorer::get_remote_user_activity($aprofile->getUri());
|
|
} catch (Exception $e) {
|
|
ActivityPubReturn::error('Invalid remote actor.');
|
|
}
|
|
try {
|
|
$actor = Activitypub_profile::update_profile($aprofile, $res);
|
|
} catch (Exception $e) {
|
|
ActivityPubReturn::error('Failed to updated remote actor information.');
|
|
}
|
|
$actor_public_key = new Activitypub_rsa();
|
|
$actor_public_key = $actor_public_key->ensure_public_key($actor);
|
|
list($verified, /*$headers*/) = HTTPSignature::verify($actor_public_key, $signatureData, $headers, $path, $body);
|
|
}
|
|
|
|
// If it still failed despite profile update
|
|
if ($verified !== 1) {
|
|
common_debug('ActivityPub Inbox: HTTP Signature: Invalid signature.');
|
|
ActivityPubReturn::error('Invalid signature.');
|
|
}
|
|
|
|
// HTTP signature checked out, make sure the "actor" of the activity matches that of the signature
|
|
common_debug('ActivityPub Inbox: HTTP Signature: Authorized request. Will now start the inbox handler.');
|
|
|
|
try {
|
|
new Activitypub_inbox_handler($data, $actor);
|
|
ActivityPubReturn::answer();
|
|
} catch (Exception $e) {
|
|
ActivityPubReturn::error($e->getMessage());
|
|
}
|
|
}
|
|
}
|