70 lines
1.8 KiB
PHP
70 lines
1.8 KiB
PHP
<?php
|
|
|
|
/**
|
|
* This file is part of the ramsey/uuid library
|
|
*
|
|
* For the full copyright and license information, please view the LICENSE
|
|
* file that was distributed with this source code.
|
|
*
|
|
* @copyright Copyright (c) Ben Ramsey <ben@benramsey.com>
|
|
* @license http://opensource.org/licenses/MIT MIT
|
|
*/
|
|
|
|
declare(strict_types=1);
|
|
|
|
namespace Ramsey\Uuid\Provider\Node;
|
|
|
|
use Ramsey\Uuid\Exception\RandomSourceException;
|
|
use Ramsey\Uuid\Provider\NodeProviderInterface;
|
|
use Ramsey\Uuid\Type\Hexadecimal;
|
|
use Throwable;
|
|
|
|
use function bin2hex;
|
|
use function dechex;
|
|
use function hex2bin;
|
|
use function hexdec;
|
|
use function str_pad;
|
|
use function substr;
|
|
|
|
use const STR_PAD_LEFT;
|
|
|
|
/**
|
|
* RandomNodeProvider generates a random node ID
|
|
*
|
|
* @link http://tools.ietf.org/html/rfc4122#section-4.5 RFC 4122, § 4.5: Node IDs that Do Not Identify the Host
|
|
*/
|
|
class RandomNodeProvider implements NodeProviderInterface
|
|
{
|
|
public function getNode(): Hexadecimal
|
|
{
|
|
try {
|
|
$nodeBytes = random_bytes(6);
|
|
} catch (Throwable $exception) {
|
|
throw new RandomSourceException(
|
|
$exception->getMessage(),
|
|
(int) $exception->getCode(),
|
|
$exception
|
|
);
|
|
}
|
|
|
|
// Split the node bytes for math on 32-bit systems.
|
|
$nodeMsb = substr($nodeBytes, 0, 3);
|
|
$nodeLsb = substr($nodeBytes, 3);
|
|
|
|
// Set the multicast bit; see RFC 4122, section 4.5.
|
|
$nodeMsb = hex2bin(
|
|
str_pad(
|
|
dechex(hexdec(bin2hex($nodeMsb)) | 0x010000),
|
|
6,
|
|
'0',
|
|
STR_PAD_LEFT
|
|
)
|
|
);
|
|
|
|
// Recombine the node bytes.
|
|
$node = $nodeMsb . $nodeLsb;
|
|
|
|
return new Hexadecimal(str_pad(bin2hex($node), 12, '0', STR_PAD_LEFT));
|
|
}
|
|
}
|