media-cloud-sync / includes / sdk / google / ramsey / uuid / src / Provider / Node / RandomNodeProvider.php

RandomNodeProvider.php in Media Cloud Sync 1.2.9, at includes/sdk/google/ramsey/uuid/src/Provider/Node/RandomNodeProvider.php

50 lines 1.7 KB

Raw Download Zip

1	<?php
2
3	/**
4	* This file is part of the ramsey/uuid library
5	*
6	* For the full copyright and license information, please view the LICENSE
7	* file that was distributed with this source code.
8	*
9	* @copyright Copyright (c) Ben Ramsey <ben@benramsey.com>
10	* @license http://opensource.org/licenses/MIT MIT
11	*/
12	declare (strict_types=1);
13	namespace Dudlewebs\WPMCS\Ramsey\Uuid\Provider\Node;
14
15	use Dudlewebs\WPMCS\Ramsey\Uuid\Exception\RandomSourceException;
16	use Dudlewebs\WPMCS\Ramsey\Uuid\Provider\NodeProviderInterface;
17	use Dudlewebs\WPMCS\Ramsey\Uuid\Type\Hexadecimal;
18	use Throwable;
19	use function bin2hex;
20	use function dechex;
21	use function hex2bin;
22	use function hexdec;
23	use function str_pad;
24	use function substr;
25	use const STR_PAD_LEFT;
26	/**
27	* RandomNodeProvider generates a random node ID
28	*
29	* @link http://tools.ietf.org/html/rfc4122#section-4.5 RFC 4122, § 4.5: Node IDs that Do Not Identify the Host
30	*/
31	class RandomNodeProvider implements NodeProviderInterface
32	{
33	public function getNode(): Hexadecimal
34	{
35	try {
36	$nodeBytes = random_bytes(6);
37	} catch (Throwable $exception) {
38	throw new RandomSourceException($exception->getMessage(), (int) $exception->getCode(), $exception);
39	}
40	// Split the node bytes for math on 32-bit systems.
41	$nodeMsb = substr($nodeBytes, 0, 3);
42	$nodeLsb = substr($nodeBytes, 3);
43	// Set the multicast bit; see RFC 4122, section 4.5.
44	$nodeMsb = hex2bin(str_pad(dechex(hexdec(bin2hex($nodeMsb)) \| 0x10000), 6, '0', STR_PAD_LEFT));
45	// Recombine the node bytes.
46	$node = $nodeMsb . $nodeLsb;
47	return new Hexadecimal(str_pad(bin2hex($node), 12, '0', STR_PAD_LEFT));
48	}
49	}
50