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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\Key;
use function array_key_exists;
use Assert\Assertion;
class Key
{
public const TYPE = 1;
public const TYPE_OKP = 1;
public const TYPE_EC2 = 2;
public const TYPE_RSA = 3;
public const TYPE_OCT = 4;
public const KID = 2;
public const ALG = 3;
public const KEY_OPS = 4;
public const BASE_IV = 5;
/**
* @var array
*/
private $data;
public function __construct(array $data)
{
Assertion::keyExists($data, self::TYPE, 'Invalid key: the type is not defined');
$this->data = $data;
}
public static function createFromData(array $data): self
{
Assertion::keyExists($data, self::TYPE, 'Invalid key: the type is not defined');
switch ($data[self::TYPE]) {
case 1:
return new OkpKey($data);
case 2:
return new Ec2Key($data);
case 3:
return new RsaKey($data);
case 4:
return new SymmetricKey($data);
default:
return new self($data);
}
}
/**
* @return int|string
*/
public function type()
{
return $this->data[self::TYPE];
}
public function alg(): int
{
return (int) $this->get(self::ALG);
}
public function getData(): array
{
return $this->data;
}
public function has(int $key): bool
{
return array_key_exists($key, $this->data);
}
/**
* @return mixed
*/
public function get(int $key)
{
Assertion::keyExists($this->data, $key, sprintf('The key has no data at index %d', $key));
return $this->data[$key];
}
}
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