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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 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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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 $exception) { |
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throw new RandomSourceException( |
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$exception->getMessage(), |
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(int) $exception->getCode(), |
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$exception |
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); |
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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 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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|
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// Recombine the node bytes. |
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$node = $nodeMsb . $nodeLsb; |
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|
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return new Hexadecimal(str_pad(bin2hex($node), 12, '0', STR_PAD_LEFT)); |
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} |
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} |
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|
