mirror of
https://github.com/ramsey/uuid.git
synced 2026-06-17 16:26:51 +03:00
Ben Ramsey
0d7b8c2b7a
This also includes heavy use of slevomat/coding-standard to apply various checks to the code, based on maintainer (me) preference.
53 lines
1.3 KiB
PHP
53 lines
1.3 KiB
PHP
<?php
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/**
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* This file is part of the ramsey/uuid library
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*
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* @copyright Copyright (c) Ben Ramsey <ben@benramsey.com>
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* @license http://opensource.org/licenses/MIT MIT
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*/
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declare(strict_types=1);
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namespace Ramsey\Uuid\Provider\Node;
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use Ramsey\Uuid\Provider\NodeProviderInterface;
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/**
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* RandomNodeProvider generates a random node ID
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*
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* @link http://tools.ietf.org/html/rfc4122#section-4.5 RFC 4122, § 4.5: Node IDs that Do Not Identify the Host
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*/
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class RandomNodeProvider implements NodeProviderInterface
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{
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/**
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* @inheritDoc
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*/
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public function getNode()
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{
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$nodeBytes = random_bytes(6);
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// Split the node bytes for math on 32-bit systems.
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$nodeMsb = substr($nodeBytes, 0, 3);
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$nodeLsb = substr($nodeBytes, 3);
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// Set the multicast bit; see RFC 4122, section 4.5.
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$nodeMsb = hex2bin(
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str_pad(
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dechex(hexdec(bin2hex($nodeMsb)) | 0x010000),
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6,
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'0',
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STR_PAD_LEFT
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)
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);
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// Recombine the node bytes.
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$node = $nodeMsb . $nodeLsb;
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return str_pad(bin2hex($node), 12, '0', STR_PAD_LEFT);
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}
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}
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