50 lines
1.2 KiB
PHP
50 lines
1.2 KiB
PHP
|
<?php
|
||
|
|
|
||
|
|
declare(strict_types=1);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The MIT License (MIT)
|
||
|
|
*
|
||
|
|
* Copyright (c) 2014-2018 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\Algorithm;
|
||
|
|
|
||
|
|
use Base64Url\Base64Url;
|
||
|
|
use Jose\Component\Core\JWK;
|
||
|
|
|
||
|
|
abstract class HMAC implements SignatureAlgorithm
|
||
|
|
{
|
||
|
|
public function allowedKeyTypes(): array
|
||
|
|
{
|
||
|
|
return ['oct'];
|
||
|
|
}
|
||
|
|
|
||
|
|
public function verify(JWK $key, string $input, string $signature): bool
|
||
|
|
{
|
||
|
|
return \hash_equals($this->sign($key, $input), $signature);
|
||
|
|
}
|
||
|
|
|
||
|
|
public function sign(JWK $key, string $input): string
|
||
|
|
{
|
||
|
|
$this->checkKey($key);
|
||
|
|
|
||
|
|
return \hash_hmac($this->getHashAlgorithm(), $input, Base64Url::decode($key->get('k')), true);
|
||
|
|
}
|
||
|
|
|
||
|
|
protected function checkKey(JWK $key)
|
||
|
|
{
|
||
|
|
if (!\in_array($key->get('kty'), $this->allowedKeyTypes(), true)) {
|
||
|
|
throw new \InvalidArgumentException('Wrong key type.');
|
||
|
|
}
|
||
|
|
if (!$key->has('k')) {
|
||
|
|
throw new \InvalidArgumentException('The key parameter "k" is missing.');
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
abstract protected function getHashAlgorithm(): string;
|
||
|
|
}
|