username = $username; $this->headers = $headers; $this->payload = $payload; } /** * Execute the job. * * @return void */ public function handle() { $username = $this->username; $headers = $this->headers; $payload = json_decode($this->payload, true, 8); $profile = Profile::whereNull('domain')->whereUsername($username)->first(); if(empty($profile)) { return; } if($profile->status != null) { return; } if($this->verifySignature($headers, $profile, $payload) == true) { InboxWorker::dispatch($headers, $profile, $payload); } else if($this->blindKeyRotation($headers, $profile) == true) { InboxWorker::dispatch($headers, $profile, $payload); } else { return; } } protected function verifySignature($headers, $profile, $payload) { $body = $this->payload; $bodyDecoded = $payload; $signature = $headers['signature']; $date = $headers['date']; if(!$signature) { abort(400, 'Missing signature header'); } if(!$date) { abort(400, 'Missing date header'); } if(!now()->parse($date)->gt(now()->subDays(1)) || !now()->parse($date)->lt(now()->addDays(1))) { abort(400, 'Invalid date'); } $signatureData = HttpSignature::parseSignatureHeader($signature); $keyId = Helpers::validateUrl($signatureData['keyId']); $id = Helpers::validateUrl($bodyDecoded['id']); $keyDomain = parse_url($keyId, PHP_URL_HOST); $idDomain = parse_url($id, PHP_URL_HOST); if(isset($bodyDecoded['object']) && is_array($bodyDecoded['object']) && isset($bodyDecoded['object']['attributedTo']) ) { if(parse_url($bodyDecoded['object']['attributedTo'], PHP_URL_HOST) !== $keyDomain) { abort(400, 'Invalid request'); } } if(!$keyDomain || !$idDomain || $keyDomain !== $idDomain) { abort(400, 'Invalid request'); } $actor = Profile::whereKeyId($keyId)->first(); if(!$actor) { $actor = Helpers::profileFirstOrNew($bodyDecoded['actor']); } if(!$actor) { return false; } $pkey = openssl_pkey_get_public($actor->public_key); $inboxPath = "/users/{$profile->username}/inbox"; list($verified, $headers) = HTTPSignature::verify($pkey, $signatureData, $headers, $inboxPath, $body); if($verified == 1) { return true; } else { return false; } } protected function blindKeyRotation($headers, $profile, $payload) { $signature = $headers['signature']; $date = $headers['date']; if(!$signature) { return false; } if(!$date) { return false; } if(!now()->parse($date)->gt(now()->subDays(1)) || !now()->parse($date)->lt(now()->addDays(1))) { return false; } $signatureData = HttpSignature::parseSignatureHeader($signature); $keyId = Helpers::validateUrl($signatureData['keyId']); $actor = Profile::whereKeyId($keyId)->whereNotNull('remote_url')->first(); if(!$actor) { return false; } if(Helpers::validateUrl($actor->remote_url) == false) { return false; } $res = Zttp::timeout(5)->withHeaders([ 'Accept' => 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"', 'User-Agent' => 'PixelfedBot v0.1 - https://pixelfed.org', ])->get($actor->remote_url); $res = json_decode($res->body(), true, 8); if($res['publicKey']['id'] !== $actor->key_id) { return false; } $actor->public_key = $res['publicKey']['publicKeyPem']; $actor->save(); return $this->verifySignature($headers, $profile, $payload); } }