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<?php
declare(strict_types=1);
namespace Jose\Component\Signature\Algorithm;
use InvalidArgumentException;
use Jose\Component\Core\JWK;
final class HS256 extends HMAC
{
public function name(): string
{
return 'HS256';
}
protected function getHashAlgorithm(): string
{
return 'sha256';
}
protected function getKey(JWK $key): string
{
$k = parent::getKey($key);
if (mb_strlen($k, '8bit') < 32) {
throw new InvalidArgumentException('Invalid key length.');
}
return $k;
}
}