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<?php
declare(strict_types=1);
/*
* The MIT License (MIT)
*
* Copyright (c) 2014-2020 Spomky-Labs
*
* This software may be modified and distributed under the terms
* of the MIT license. See the LICENSE file for details.
*/
namespace Jose\Component\Signature;
use InvalidArgumentException;
use Jose\Component\Checker\TokenTypeSupport;
use Jose\Component\Core\JWT;
final class JWSTokenSupport implements TokenTypeSupport
{
public function supports(JWT $jwt): bool
{
return $jwt instanceof JWS;
}
/**
* @throws InvalidArgumentException if the signature index does not exist
*/
public function retrieveTokenHeaders(JWT $jwt, int $index, array &$protectedHeader, array &$unprotectedHeader): void
{
if (!$jwt instanceof JWS) {
return;
}
if ($index > $jwt->countSignatures()) {
throw new InvalidArgumentException('Unknown signature index.');
}
$protectedHeader = $jwt->getSignature($index)->getProtectedHeader();
$unprotectedHeader = $jwt->getSignature($index)->getHeader();
}
}