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<?php
/**
* SPDX-FileCopyrightText: 2017-2024 Nextcloud GmbH and Nextcloud contributors
* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
* SPDX-License-Identifier: AGPL-3.0-only
*/
namespace OCA\Federation\BackgroundJob;
use GuzzleHttp\Exception\ClientException;
use GuzzleHttp\Exception\RequestException;
use OCA\Federation\TrustedServers;
use OCP\AppFramework\Http;
use OCP\AppFramework\Utility\ITimeFactory;
use OCP\BackgroundJob\IJobList;
use OCP\BackgroundJob\Job;
use OCP\Http\Client\IClient;
use OCP\Http\Client\IClientService;
use OCP\Http\Client\IResponse;
use OCP\IURLGenerator;
use OCP\OCS\IDiscoveryService;
use Psr\Log\LoggerInterface;
/**
* Class GetSharedSecret
*
* Request shared secret from remote Nextcloud
*
* @package OCA\Federation\Backgroundjob
*/
class GetSharedSecret extends Job {
private IClient $httpClient;
private IJobList $jobList;
private IURLGenerator $urlGenerator;
private TrustedServers $trustedServers;
private IDiscoveryService $ocsDiscoveryService;
private LoggerInterface $logger;
protected bool $retainJob = false;
private string $defaultEndPoint = '/ocs/v2.php/apps/federation/api/v1/shared-secret';
/** 30 day = 2592000sec */
private int $maxLifespan = 2592000;
public function __construct(
IClientService $httpClientService,
IURLGenerator $urlGenerator,
IJobList $jobList,
TrustedServers $trustedServers,
LoggerInterface $logger,
IDiscoveryService $ocsDiscoveryService,
ITimeFactory $timeFactory,
) {
parent::__construct($timeFactory);
$this->logger = $logger;
$this->httpClient = $httpClientService->newClient();
$this->jobList = $jobList;
$this->urlGenerator = $urlGenerator;
$this->ocsDiscoveryService = $ocsDiscoveryService;
$this->trustedServers = $trustedServers;
}
/**
* Run the job, then remove it from the joblist
*/
public function start(IJobList $jobList): void {
$target = $this->argument['url'];
// only execute if target is still in the list of trusted domains
if ($this->trustedServers->isTrustedServer($target)) {
$this->parentStart($jobList);
}
$jobList->remove($this, $this->argument);
if ($this->retainJob) {
$this->reAddJob($this->argument);
}
}
protected function parentStart(IJobList $jobList): void {
parent::start($jobList);
}
protected function run($argument) {
$target = $argument['url'];
$created = isset($argument['created']) ? (int)$argument['created'] : $this->time->getTime();
$currentTime = $this->time->getTime();
$source = $this->urlGenerator->getAbsoluteURL('/');
$source = rtrim($source, '/');
$token = $argument['token'];
// kill job after 30 days of trying
$deadline = $currentTime - $this->maxLifespan;
if ($created < $deadline) {
$this->logger->warning("The job to get the shared secret job is too old and gets stopped now without retention. Setting server status of '{$target}' to failure.");
$this->retainJob = false;
$this->trustedServers->setServerStatus($target, TrustedServers::STATUS_FAILURE);
return;
}
$endPoints = $this->ocsDiscoveryService->discover($target, 'FEDERATED_SHARING');
$endPoint = $endPoints['shared-secret'] ?? $this->defaultEndPoint;
// make sure that we have a well formatted url
$url = rtrim($target, '/') . '/' . trim($endPoint, '/');
$result = null;
try {
$result = $this->httpClient->get(
$url,
[
'query' =>
[
'url' => $source,
'token' => $token,
'format' => 'json',
],
'timeout' => 3,
'connect_timeout' => 3,
]
);
$status = $result->getStatusCode();
} catch (ClientException $e) {
$status = $e->getCode();
if ($status === Http::STATUS_FORBIDDEN) {
$this->logger->info($target . ' refused to exchange a shared secret with you.', ['app' => 'federation']);
} else {
$this->logger->info($target . ' responded with a ' . $status . ' containing: ' . $e->getMessage(), ['app' => 'federation']);
}
} catch (RequestException $e) {
$status = -1; // There is no status code if we could not connect
$this->logger->info('Could not connect to ' . $target, [
'exception' => $e,
]);
} catch (\Throwable $e) {
$status = Http::STATUS_INTERNAL_SERVER_ERROR;
$this->logger->error($e->getMessage(), [
'exception' => $e,
]);
}
// if we received a unexpected response we try again later
if (
$status !== Http::STATUS_OK
&& $status !== Http::STATUS_FORBIDDEN
) {
$this->retainJob = true;
}
if ($status === Http::STATUS_OK && $result instanceof IResponse) {
$body = $result->getBody();
$result = json_decode($body, true);
if (isset($result['ocs']['data']['sharedSecret'])) {
$this->trustedServers->addSharedSecret(
$target,
$result['ocs']['data']['sharedSecret']
);
} else {
$this->logger->error(
'remote server "' . $target . '"" does not return a valid shared secret. Received data: ' . $body,
['app' => 'federation']
);
$this->trustedServers->setServerStatus($target, TrustedServers::STATUS_FAILURE);
}
}
}
/**
* Re-add background job
*
* @param array $argument
*/
protected function reAddJob(array $argument): void {
$url = $argument['url'];
$created = $argument['created'] ?? $this->time->getTime();
$token = $argument['token'];
$this->jobList->add(
GetSharedSecret::class,
[
'url' => $url,
'token' => $token,
'created' => $created
]
);
}
}
|
