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<?php
/**
* SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
namespace OC\AppFramework\Middleware\Security;
use OC\AppFramework\Middleware\Security\Exceptions\NotConfirmedException;
use OC\AppFramework\Utility\ControllerMethodReflector;
use OC\Authentication\Token\IProvider;
use OC\User\Manager;
use OCP\AppFramework\Controller;
use OCP\AppFramework\Http\Attribute\PasswordConfirmationRequired;
use OCP\AppFramework\Middleware;
use OCP\AppFramework\Utility\ITimeFactory;
use OCP\Authentication\Exceptions\ExpiredTokenException;
use OCP\Authentication\Exceptions\InvalidTokenException;
use OCP\Authentication\Exceptions\WipeTokenException;
use OCP\Authentication\Token\IToken;
use OCP\IRequest;
use OCP\ISession;
use OCP\IUserSession;
use OCP\Session\Exceptions\SessionNotAvailableException;
use OCP\User\Backend\IPasswordConfirmationBackend;
use Psr\Log\LoggerInterface;
use ReflectionMethod;
class PasswordConfirmationMiddleware extends Middleware {
private array $excludedUserBackEnds = ['user_saml' => true, 'user_globalsiteselector' => true];
public function __construct(
private ControllerMethodReflector $reflector,
private ISession $session,
private IUserSession $userSession,
private ITimeFactory $timeFactory,
private IProvider $tokenProvider,
private readonly LoggerInterface $logger,
private readonly IRequest $request,
private readonly Manager $userManager,
) {
}
/**
* @throws NotConfirmedException
*/
public function beforeController(Controller $controller, string $methodName) {
$reflectionMethod = new ReflectionMethod($controller, $methodName);
if (!$this->needsPasswordConfirmation($reflectionMethod)) {
return;
}
$user = $this->userSession->getUser();
$backendClassName = '';
if ($user !== null) {
$backend = $user->getBackend();
if ($backend instanceof IPasswordConfirmationBackend) {
if (!$backend->canConfirmPassword($user->getUID())) {
return;
}
}
$backendClassName = $user->getBackendClassName();
}
try {
$sessionId = $this->session->getId();
$token = $this->tokenProvider->getToken($sessionId);
} catch (SessionNotAvailableException|InvalidTokenException|WipeTokenException|ExpiredTokenException) {
// States we do not deal with here.
return;
}
$scope = $token->getScopeAsArray();
if (isset($scope[IToken::SCOPE_SKIP_PASSWORD_VALIDATION]) && $scope[IToken::SCOPE_SKIP_PASSWORD_VALIDATION] === true) {
// Users logging in from SSO backends cannot confirm their password by design
return;
}
if ($this->isPasswordConfirmationStrict($reflectionMethod)) {
$authHeader = $this->request->getHeader('Authorization');
[, $password] = explode(':', base64_decode(substr($authHeader, 6)), 2);
$loginName = $this->session->get('loginname');
$loginResult = $this->userManager->checkPassword($loginName, $password);
if ($loginResult === false) {
throw new NotConfirmedException();
}
$this->session->set('last-password-confirm', $this->timeFactory->getTime());
} else {
$lastConfirm = (int)$this->session->get('last-password-confirm');
// TODO: confirm excludedUserBackEnds can go away and remove it
if (!isset($this->excludedUserBackEnds[$backendClassName]) && $lastConfirm < ($this->timeFactory->getTime() - (30 * 60 + 15))) { // allow 15 seconds delay
throw new NotConfirmedException();
}
}
}
private function needsPasswordConfirmation(ReflectionMethod $reflectionMethod): bool {
$attributes = $reflectionMethod->getAttributes(PasswordConfirmationRequired::class);
if (!empty($attributes)) {
return true;
}
if ($this->reflector->hasAnnotation('PasswordConfirmationRequired')) {
$this->logger->debug($reflectionMethod->getDeclaringClass()->getName() . '::' . $reflectionMethod->getName() . ' uses the @' . 'PasswordConfirmationRequired' . ' annotation and should use the #[PasswordConfirmationRequired] attribute instead');
return true;
}
return false;
}
private function isPasswordConfirmationStrict(ReflectionMethod $reflectionMethod): bool {
$attributes = $reflectionMethod->getAttributes(PasswordConfirmationRequired::class);
return !empty($attributes) && ($attributes[0]->newInstance()->getStrict());
}
}
|
