defender-security / vendor / ramsey / uuid / src / Generator / DefaultTimeGenerator.php

DefaultTimeGenerator.php in Defender Security – Malware Scanner, Login Security & Firewall 6.1.0, at vendor/ramsey/uuid/src/Generator/DefaultTimeGenerator.php

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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 <[email protected]>
10	* @license http://opensource.org/licenses/MIT MIT
11	*/
12
13	declare(strict_types=1);
14
15	namespace Ramsey\Uuid\Generator;
16
17	use Ramsey\Uuid\Converter\TimeConverterInterface;
18	use Ramsey\Uuid\Exception\InvalidArgumentException;
19	use Ramsey\Uuid\Exception\RandomSourceException;
20	use Ramsey\Uuid\Exception\TimeSourceException;
21	use Ramsey\Uuid\Provider\NodeProviderInterface;
22	use Ramsey\Uuid\Provider\TimeProviderInterface;
23	use Ramsey\Uuid\Type\Hexadecimal;
24	use Throwable;
25
26	use function dechex;
27	use function hex2bin;
28	use function is_int;
29	use function pack;
30	use function preg_match;
31	use function sprintf;
32	use function str_pad;
33	use function strlen;
34
35	use const STR_PAD_LEFT;
36
37	/**
38	* DefaultTimeGenerator generates strings of binary data based on a node ID, clock sequence, and the current time
39	*/
40	class DefaultTimeGenerator implements TimeGeneratorInterface
41	{
42	public function __construct(
43	private NodeProviderInterface $nodeProvider,
44	private TimeConverterInterface $timeConverter,
45	private TimeProviderInterface $timeProvider,
46	) {
47	}
48
49	/**
50	* @throws InvalidArgumentException if the parameters contain invalid values
51	* @throws RandomSourceException if random_int() throws an exception/error
52	*
53	* @inheritDoc
54	*/
55	public function generate($node = null, ?int $clockSeq = null): string
56	{
57	if ($node instanceof Hexadecimal) {
58	$node = $node->toString();
59	}
60
61	$node = $this->getValidNode($node);
62
63	if ($clockSeq === null) {
64	try {
65	// This does not use "stable storage"; see RFC 9562, section 6.3.
66	$clockSeq = random_int(0, 0x3fff);
67	} catch (Throwable $exception) {
68	throw new RandomSourceException($exception->getMessage(), (int) $exception->getCode(), $exception);
69	}
70	}
71
72	$time = $this->timeProvider->getTime();
73
74	$uuidTime = $this->timeConverter->calculateTime(
75	$time->getSeconds()->toString(),
76	$time->getMicroseconds()->toString()
77	);
78
79	$timeHex = str_pad($uuidTime->toString(), 16, '0', STR_PAD_LEFT);
80
81	if (strlen($timeHex) !== 16) {
82	throw new TimeSourceException(sprintf('The generated time of \'%s\' is larger than expected', $timeHex));
83	}
84
85	$timeBytes = (string) hex2bin($timeHex);
86
87	return $timeBytes[4] . $timeBytes[5] . $timeBytes[6] . $timeBytes[7]
88	. $timeBytes[2] . $timeBytes[3] . $timeBytes[0] . $timeBytes[1]
89	. pack('n*', $clockSeq) . $node;
90	}
91
92	/**
93	* Uses the node provider given when constructing this instance to get the node ID (usually a MAC address)
94	*
95	* @param int \| string \| null $node A node value that may be used to override the node provider
96	*
97	* @return string 6-byte binary string representation of the node
98	*
99	* @throws InvalidArgumentException
100	*/
101	private function getValidNode(int \| string \| null $node): string
102	{
103	if ($node === null) {
104	$node = $this->nodeProvider->getNode();
105	}
106
107	// Convert the node to hex if it is still an integer.
108	if (is_int($node)) {
109	$node = dechex($node);
110	}
111
112	if (!preg_match('/^[A-Fa-f0-9]+$/', (string) $node) \|\| strlen((string) $node) > 12) {
113	throw new InvalidArgumentException('Invalid node value');
114	}
115
116	return (string) hex2bin(str_pad((string) $node, 12, '0', STR_PAD_LEFT));
117	}
118	}
119