googleanalytics
/
lib
/
analytics-admin
/
vendor
/
ramsey
/
uuid
/
src
/
Provider
/
Node
/
RandomNodeProvider.php
googleanalytics
/
lib
/
analytics-admin
/
vendor
/
ramsey
/
uuid
/
src
/
Provider
/
Node
Last commit date
FallbackNodeProvider.php
3 years ago
NodeProviderCollection.php
3 years ago
RandomNodeProvider.php
3 years ago
StaticNodeProvider.php
3 years ago
SystemNodeProvider.php
3 years ago
RandomNodeProvider.php
70 lines
| 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 | |
| 13 | declare(strict_types=1); |
| 14 | |
| 15 | namespace Ramsey\Uuid\Provider\Node; |
| 16 | |
| 17 | use Ramsey\Uuid\Exception\RandomSourceException; |
| 18 | use Ramsey\Uuid\Provider\NodeProviderInterface; |
| 19 | use Ramsey\Uuid\Type\Hexadecimal; |
| 20 | use Throwable; |
| 21 | |
| 22 | use function bin2hex; |
| 23 | use function dechex; |
| 24 | use function hex2bin; |
| 25 | use function hexdec; |
| 26 | use function str_pad; |
| 27 | use function substr; |
| 28 | |
| 29 | use const STR_PAD_LEFT; |
| 30 | |
| 31 | /** |
| 32 | * RandomNodeProvider generates a random node ID |
| 33 | * |
| 34 | * @link http://tools.ietf.org/html/rfc4122#section-4.5 RFC 4122, § 4.5: Node IDs that Do Not Identify the Host |
| 35 | */ |
| 36 | class RandomNodeProvider implements NodeProviderInterface |
| 37 | { |
| 38 | public function getNode(): Hexadecimal |
| 39 | { |
| 40 | try { |
| 41 | $nodeBytes = random_bytes(6); |
| 42 | } catch (Throwable $exception) { |
| 43 | throw new RandomSourceException( |
| 44 | $exception->getMessage(), |
| 45 | (int) $exception->getCode(), |
| 46 | $exception |
| 47 | ); |
| 48 | } |
| 49 | |
| 50 | // Split the node bytes for math on 32-bit systems. |
| 51 | $nodeMsb = substr($nodeBytes, 0, 3); |
| 52 | $nodeLsb = substr($nodeBytes, 3); |
| 53 | |
| 54 | // Set the multicast bit; see RFC 4122, section 4.5. |
| 55 | $nodeMsb = hex2bin( |
| 56 | str_pad( |
| 57 | dechex(hexdec(bin2hex($nodeMsb)) | 0x010000), |
| 58 | 6, |
| 59 | '0', |
| 60 | STR_PAD_LEFT |
| 61 | ) |
| 62 | ); |
| 63 | |
| 64 | // Recombine the node bytes. |
| 65 | $node = $nodeMsb . $nodeLsb; |
| 66 | |
| 67 | return new Hexadecimal(str_pad(bin2hex($node), 12, '0', STR_PAD_LEFT)); |
| 68 | } |
| 69 | } |
| 70 |