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<?php /* * This file is part of the Symfony package. * * (c) Fabien Potencier <fabien@symfony.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\Security\Http\RateLimiter; use Symfony\Component\HttpFoundation\RateLimiter\AbstractRequestRateLimiter; use Symfony\Component\HttpFoundation\Request; use Symfony\Component\RateLimiter\RateLimiterFactory; use Symfony\Component\Security\Core\Exception\InvalidArgumentException; use Symfony\Component\Security\Http\SecurityRequestAttributes; /** * A default login throttling limiter. * * This limiter prevents breadth-first attacks by enforcing * a limit on username+IP and a (higher) limit on IP. * * @author Wouter de Jong <wouter@wouterj.nl> */ final class DefaultLoginRateLimiter extends AbstractRequestRateLimiter { /** * @param non-empty-string $secret A secret to use for hashing the IP address and username */ public function __construct( private RateLimiterFactory $globalFactory, private RateLimiterFactory $localFactory, #[\SensitiveParameter] private string $secret, ) { if (!$secret) { throw new InvalidArgumentException('A non-empty secret is required.'); } } protected function getLimiters(Request $request): array { $username = $request->attributes->get(SecurityRequestAttributes::LAST_USERNAME, ''); $username = preg_match('//u', $username) ? mb_strtolower($username, 'UTF-8') : strtolower($username); return [ $this->globalFactory->create($this->hash($request->getClientIp())), $this->localFactory->create($this->hash($username.'-'.$request->getClientIp())), ]; } private function hash(string $data): string { return strtr(substr(base64_encode(hash_hmac('sha256', $data, $this->secret, true)), 0, 8), '/+', '._'); } }
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