laipower/wp-content/plugins/wp-webauthn/vendor/web-token/jwt-signature-algorithm-ecdsa/ECDSA.php

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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\Algorithm;
use function defined;
use function in_array;
use InvalidArgumentException;
use Jose\Component\Core\JWK;
use Jose\Component\Core\Util\ECKey;
use Jose\Component\Core\Util\ECSignature;
use LogicException;
use Throwable;
abstract class ECDSA implements SignatureAlgorithm
{
public function __construct()
{
if (!defined('OPENSSL_KEYTYPE_EC')) {
throw new LogicException('Elliptic Curve key type not supported by your environment.');
}
}
public function allowedKeyTypes(): array
{
return ['EC'];
}
public function sign(JWK $key, string $input): string
{
$this->checkKey($key);
if (!$key->has('d')) {
throw new InvalidArgumentException('The EC key is not private');
}
$pem = ECKey::convertPrivateKeyToPEM($key);
openssl_sign($input, $signature, $pem, $this->getHashAlgorithm());
return ECSignature::fromAsn1($signature, $this->getSignaturePartLength());
}
public function verify(JWK $key, string $input, string $signature): bool
{
$this->checkKey($key);
try {
$der = ECSignature::toAsn1($signature, $this->getSignaturePartLength());
$pem = ECKey::convertPublicKeyToPEM($key);
return 1 === openssl_verify($input, $der, $pem, $this->getHashAlgorithm());
} catch (Throwable $e) {
return false;
}
}
abstract protected function getHashAlgorithm(): string;
abstract protected function getSignaturePartLength(): int;
private function checkKey(JWK $key): void
{
if (!in_array($key->get('kty'), $this->allowedKeyTypes(), true)) {
throw new InvalidArgumentException('Wrong key type.');
}
foreach (['x', 'y', 'crv'] as $k) {
if (!$key->has($k)) {
throw new InvalidArgumentException(sprintf('The key parameter "%s" is missing.', $k));
}
}
}
}