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<?php
/**
* SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
* SPDX-License-Identifier: AGPL-3.0-only
*/
namespace OCA\DAV\Connector;
use OCA\DAV\Connector\Sabre\PublicAuth;
use OCP\Defaults;
use OCP\IRequest;
use OCP\ISession;
use OCP\Security\Bruteforce\IThrottler;
use OCP\Share\Exceptions\ShareNotFound;
use OCP\Share\IManager;
use OCP\Share\IShare;
use Sabre\DAV\Auth\Backend\AbstractBasic;
/**
* Class PublicAuth
*
* @package OCA\DAV\Connector
*/
class LegacyPublicAuth extends AbstractBasic {
private const BRUTEFORCE_ACTION = 'legacy_public_webdav_auth';
private ?IShare $share = null;
public function __construct(
private IRequest $request,
private IManager $shareManager,
private ISession $session,
private IThrottler $throttler,
) {
// setup realm
$defaults = new Defaults();
$this->realm = $defaults->getName() ?: 'Nextcloud';
}
/**
* Validates a username and password
*
* This method should return true or false depending on if login
* succeeded.
*
* @param string $username
* @param string $password
*
* @return bool
* @throws \Sabre\DAV\Exception\NotAuthenticated
*/
protected function validateUserPass($username, $password) {
$this->throttler->sleepDelayOrThrowOnMax($this->request->getRemoteAddress(), self::BRUTEFORCE_ACTION);
try {
$share = $this->shareManager->getShareByToken($username);
} catch (ShareNotFound $e) {
$this->throttler->registerAttempt(self::BRUTEFORCE_ACTION, $this->request->getRemoteAddress());
return false;
}
$this->share = $share;
\OC_User::setIncognitoMode(true);
// check if the share is password protected
if ($share->getPassword() !== null) {
if ($share->getShareType() === IShare::TYPE_LINK
|| $share->getShareType() === IShare::TYPE_EMAIL
|| $share->getShareType() === IShare::TYPE_CIRCLE) {
if ($this->shareManager->checkPassword($share, $password)) {
return true;
} elseif ($this->session->exists(PublicAuth::DAV_AUTHENTICATED)
&& $this->session->get(PublicAuth::DAV_AUTHENTICATED) === $share->getId()) {
return true;
} else {
if (in_array('XMLHttpRequest', explode(',', $this->request->getHeader('X-Requested-With')))) {
// do not re-authenticate over ajax, use dummy auth name to prevent browser popup
http_response_code(401);
header('WWW-Authenticate: DummyBasic realm="' . $this->realm . '"');
throw new \Sabre\DAV\Exception\NotAuthenticated('Cannot authenticate over ajax calls');
}
$this->throttler->registerAttempt(self::BRUTEFORCE_ACTION, $this->request->getRemoteAddress());
return false;
}
} elseif ($share->getShareType() === IShare::TYPE_REMOTE) {
return true;
} else {
$this->throttler->registerAttempt(self::BRUTEFORCE_ACTION, $this->request->getRemoteAddress());
return false;
}
}
return true;
}
public function getShare(): IShare {
assert($this->share !== null);
return $this->share;
}
}
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