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<?php
declare(strict_types=1);
/*
* The MIT License (MIT)
*
* Copyright (c) 2014-2021 Spomky-Labs
*
* This software may be modified and distributed under the terms
* of the MIT license. See the LICENSE file for details.
*/
namespace Cose\Algorithm\Signature\RSA;
use Assert\Assertion;
use Cose\Algorithm\Signature\Signature;
use Cose\Key\Key;
use Cose\Key\RsaKey;
use InvalidArgumentException;
abstract class RSA implements Signature
{
public function sign(string $data, Key $key): string
{
$key = $this->handleKey($key);
Assertion::true($key->isPrivate(), 'The key is not private');
if (false === openssl_sign($data, $signature, $key->asPem(), $this->getHashAlgorithm())) {
throw new InvalidArgumentException('Unable to sign the data');
}
return $signature;
}
public function verify(string $data, Key $key, string $signature): bool
{
$key = $this->handleKey($key);
return 1 === openssl_verify($data, $signature, $key->asPem(), $this->getHashAlgorithm());
}
abstract protected function getHashAlgorithm(): int;
private function handleKey(Key $key): RsaKey
{
return new RsaKey($key->getData());
}
}
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