Subversion-Projekte lars-tiefland.laravel_shop

<?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));

    }

}