56 lines
1.6 KiB
PHP
56 lines
1.6 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\Exception\RandomSourceException;
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use Ramsey\Uuid\Provider\NodeProviderInterface;
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use Ramsey\Uuid\Type\Hexadecimal;
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use Throwable;
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use function bin2hex;
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use function dechex;
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use function hex2bin;
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use function hexdec;
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use function str_pad;
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use function substr;
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use const STR_PAD_LEFT;
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/**
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* RandomNodeProvider generates a random node ID
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*
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* @link https://www.rfc-editor.org/rfc/rfc9562#section-6.10 RFC 9562, 6.10. UUIDs 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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public function getNode(): Hexadecimal
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{
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try {
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$nodeBytes = random_bytes(6);
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} catch (Throwable $exception) {
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throw new RandomSourceException($exception->getMessage(), (int) $exception->getCode(), $exception);
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}
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// Split the node bytes for math on 32-bit systems.
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$nodeMsb = substr($nodeBytes, 0, 3);
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$nodeLsb = substr($nodeBytes, 3);
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// Set the multicast bit; see RFC 9562, section 6.10.
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$nodeMsb = hex2bin(str_pad(dechex(hexdec(bin2hex($nodeMsb)) | 0x010000), 6, '0', STR_PAD_LEFT));
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return new Hexadecimal(str_pad(bin2hex($nodeMsb . $nodeLsb), 12, '0', STR_PAD_LEFT));
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}
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}
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