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<?php |
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|
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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 <[email protected]> |
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* @license http://opensource.org/licenses/MIT MIT |
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*/ |
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|
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declare(strict_types=1); |
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|
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namespace Ramsey\Uuid\Provider\Node; |
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|
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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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|
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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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|
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use const STR_PAD_LEFT; |
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|
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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(), $exception); |
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} |
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|
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// Split the node bytes for math on 32-bit systems. |
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$nodeMsb = substr($nodeBytes, 0, 3); |
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$nodeLsb = substr($nodeBytes, 3); |
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|
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// Set the multicast bit; see RFC 9562, section 6.10. |
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$nodeMsb = hex2bin(str_pad(dechex(hexdec(bin2hex($nodeMsb)) | 0x010000), 6, '0', STR_PAD_LEFT)); |
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|
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return new Hexadecimal(str_pad(bin2hex($nodeMsb . $nodeLsb), 12, '0', STR_PAD_LEFT)); |
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} |
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} |
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|
