Added third-party dependency 'Symfony\uid'

src/ncc/ThirdParty/Symfony/uid/UuidV6.php

@@ -0,0 +1,66 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace ncc\Symfony\Component\Uid;
+
+/**
+ * A v6 UUID is lexicographically sortable and contains a 60-bit timestamp and 62 extra unique bits.
+ *
+ * Unlike UUIDv1, this implementation of UUIDv6 doesn't leak the MAC address of the host.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class UuidV6 extends Uuid
+{
+    protected const TYPE = 6;
+
+    private static string $node;
+
+    public function __construct(string $uuid = null)
+    {
+        if (null === $uuid) {
+            $this->uid = static::generate();
+        } else {
+            parent::__construct($uuid);
+        }
+    }
+
+    public function getDateTime(): \DateTimeImmutable
+    {
+        return BinaryUtil::hexToDateTime('0'.substr($this->uid, 0, 8).substr($this->uid, 9, 4).substr($this->uid, 15, 3));
+    }
+
+    public function getNode(): string
+    {
+        return substr($this->uid, 24);
+    }
+
+    public static function generate(\DateTimeInterface $time = null, Uuid $node = null): string
+    {
+        $uuidV1 = UuidV1::generate($time, $node);
+        $uuid = substr($uuidV1, 15, 3).substr($uuidV1, 9, 4).$uuidV1[0].'-'.substr($uuidV1, 1, 4).'-6'.substr($uuidV1, 5, 3).substr($uuidV1, 18, 6);
+
+        if ($node) {
+            return $uuid.substr($uuidV1, 24);
+        }
+
+        // uuid_create() returns a stable "node" that can leak the MAC of the host, but
+        // UUIDv6 prefers a truly random number here, let's XOR both to preserve the entropy
+
+        if (!isset(self::$node)) {
+            $seed = [random_int(0, 0xFFFFFF), random_int(0, 0xFFFFFF)];
+            $node = unpack('N2', hex2bin('00'.substr($uuidV1, 24, 6)).hex2bin('00'.substr($uuidV1, 30)));
+            self::$node = sprintf('%06x%06x', ($seed[0] ^ $node[1]) | 0x010000, $seed[1] ^ $node[2]);
+        }
+
+        return $uuid.self::$node;
+    }
+}