<?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\Key;
use Assert\Assertion;
class SymmetricKey extends Key
{
public const DATA_K = -1;
public function __construct(array $data)
{
parent::__construct($data);
Assertion::eq($data[self::TYPE], self::TYPE_OCT, 'Invalid symmetric key. The key type does not correspond to a symmetric key');
Assertion::keyExists($data, self::DATA_K, 'Invalid symmetric key. The parameter "k" is missing');
}
public function k(): string
{
return $this->get(self::DATA_K);
}
}