Primo Committ

vendor/ramsey/uuid/src/Provider/Node/RandomNodeProvider.php

@@ -0,0 +1,69 @@
+<?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));
+    }
+}