wpide / vendor / symfony / http-foundation / IpUtils.php

IpUtils.php in WPIDE – File Manager & Code Editor 3.5.9, at vendor/symfony/http-foundation/IpUtils.php

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1	<?php
2
3	/*
4	* This file is part of the Symfony package.
5	*
6	* (c) Fabien Potencier <[email protected]>
7	*
8	* For the full copyright and license information, please view the LICENSE
9	* file that was distributed with this source code.
10	*/
11
12	namespace Symfony\Component\HttpFoundation;
13
14	/**
15	* Http utility functions.
16	*
17	* @author Fabien Potencier <[email protected]>
18	*/
19	class IpUtils
20	{
21	private static $checkedIps = [];
22
23	/**
24	* This class should not be instantiated.
25	*/
26	private function __construct()
27	{
28	}
29
30	/**
31	* Checks if an IPv4 or IPv6 address is contained in the list of given IPs or subnets.
32	*
33	* @param string\|array $ips List of IPs or subnets (can be a string if only a single one)
34	*
35	* @return bool
36	*/
37	public static function checkIp(?string $requestIp, $ips)
38	{
39	if (null === $requestIp) {
40	trigger_deprecation('symfony/http-foundation', '5.4', 'Passing null as $requestIp to "%s()" is deprecated, pass an empty string instead.', __METHOD__);
41
42	return false;
43	}
44
45	if (!\is_array($ips)) {
46	$ips = [$ips];
47	}
48
49	$method = substr_count($requestIp, ':') > 1 ? 'checkIp6' : 'checkIp4';
50
51	foreach ($ips as $ip) {
52	if (self::$method($requestIp, $ip)) {
53	return true;
54	}
55	}
56
57	return false;
58	}
59
60	/**
61	* Compares two IPv4 addresses.
62	* In case a subnet is given, it checks if it contains the request IP.
63	*
64	* @param string $ip IPv4 address or subnet in CIDR notation
65	*
66	* @return bool Whether the request IP matches the IP, or whether the request IP is within the CIDR subnet
67	*/
68	public static function checkIp4(?string $requestIp, string $ip)
69	{
70	if (null === $requestIp) {
71	trigger_deprecation('symfony/http-foundation', '5.4', 'Passing null as $requestIp to "%s()" is deprecated, pass an empty string instead.', __METHOD__);
72
73	return false;
74	}
75
76	$cacheKey = $requestIp.'-'.$ip.'-v4';
77	if (isset(self::$checkedIps[$cacheKey])) {
78	return self::$checkedIps[$cacheKey];
79	}
80
81	if (!filter_var($requestIp, \FILTER_VALIDATE_IP, \FILTER_FLAG_IPV4)) {
82	return self::$checkedIps[$cacheKey] = false;
83	}
84
85	if (str_contains($ip, '/')) {
86	[$address, $netmask] = explode('/', $ip, 2);
87
88	if ('0' === $netmask) {
89	return self::$checkedIps[$cacheKey] = false !== filter_var($address, \FILTER_VALIDATE_IP, \FILTER_FLAG_IPV4);
90	}
91
92	if ($netmask < 0 \|\| $netmask > 32) {
93	return self::$checkedIps[$cacheKey] = false;
94	}
95	} else {
96	$address = $ip;
97	$netmask = 32;
98	}
99
100	if (false === ip2long($address)) {
101	return self::$checkedIps[$cacheKey] = false;
102	}
103
104	return self::$checkedIps[$cacheKey] = 0 === substr_compare(sprintf('%032b', ip2long($requestIp)), sprintf('%032b', ip2long($address)), 0, $netmask);
105	}
106
107	/**
108	* Compares two IPv6 addresses.
109	* In case a subnet is given, it checks if it contains the request IP.
110	*
111	* @author David Soria Parra <dsp at php dot net>
112	*
113	* @see https://github.com/dsp/v6tools
114	*
115	* @param string $ip IPv6 address or subnet in CIDR notation
116	*
117	* @return bool
118	*
119	* @throws \RuntimeException When IPV6 support is not enabled
120	*/
121	public static function checkIp6(?string $requestIp, string $ip)
122	{
123	if (null === $requestIp) {
124	trigger_deprecation('symfony/http-foundation', '5.4', 'Passing null as $requestIp to "%s()" is deprecated, pass an empty string instead.', __METHOD__);
125
126	return false;
127	}
128
129	$cacheKey = $requestIp.'-'.$ip.'-v6';
130	if (isset(self::$checkedIps[$cacheKey])) {
131	return self::$checkedIps[$cacheKey];
132	}
133
134	if (!((\extension_loaded('sockets') && \defined('AF_INET6')) \|\| @inet_pton('::1'))) {
135	throw new \RuntimeException('Unable to check Ipv6. Check that PHP was not compiled with option "disable-ipv6".');
136	}
137
138	// Check to see if we were given a IP4 $requestIp or $ip by mistake
139	if (!filter_var($requestIp, \FILTER_VALIDATE_IP, \FILTER_FLAG_IPV6)) {
140	return self::$checkedIps[$cacheKey] = false;
141	}
142
143	if (str_contains($ip, '/')) {
144	[$address, $netmask] = explode('/', $ip, 2);
145
146	if (!filter_var($address, \FILTER_VALIDATE_IP, \FILTER_FLAG_IPV6)) {
147	return self::$checkedIps[$cacheKey] = false;
148	}
149
150	if ('0' === $netmask) {
151	return (bool) unpack('n*', @inet_pton($address));
152	}
153
154	if ($netmask < 1 \|\| $netmask > 128) {
155	return self::$checkedIps[$cacheKey] = false;
156	}
157	} else {
158	if (!filter_var($ip, \FILTER_VALIDATE_IP, \FILTER_FLAG_IPV6)) {
159	return self::$checkedIps[$cacheKey] = false;
160	}
161
162	$address = $ip;
163	$netmask = 128;
164	}
165
166	$bytesAddr = unpack('n*', @inet_pton($address));
167	$bytesTest = unpack('n*', @inet_pton($requestIp));
168
169	if (!$bytesAddr \|\| !$bytesTest) {
170	return self::$checkedIps[$cacheKey] = false;
171	}
172
173	for ($i = 1, $ceil = ceil($netmask / 16); $i <= $ceil; ++$i) {
174	$left = $netmask - 16 * ($i - 1);
175	$left = ($left <= 16) ? $left : 16;
176	$mask = ~(0xFFFF >> $left) & 0xFFFF;
177	if (($bytesAddr[$i] & $mask) != ($bytesTest[$i] & $mask)) {
178	return self::$checkedIps[$cacheKey] = false;
179	}
180	}
181
182	return self::$checkedIps[$cacheKey] = true;
183	}
184
185	/**
186	* Anonymizes an IP/IPv6.
187	*
188	* Removes the last byte for v4 and the last 8 bytes for v6 IPs
189	*/
190	public static function anonymize(string $ip): string
191	{
192	$wrappedIPv6 = false;
193	if ('[' === substr($ip, 0, 1) && ']' === substr($ip, -1, 1)) {
194	$wrappedIPv6 = true;
195	$ip = substr($ip, 1, -1);
196	}
197
198	$packedAddress = inet_pton($ip);
199	if (4 === \strlen($packedAddress)) {
200	$mask = '255.255.255.0';
201	} elseif ($ip === inet_ntop($packedAddress & inet_pton('::ffff:ffff:ffff'))) {
202	$mask = '::ffff:ffff:ff00';
203	} elseif ($ip === inet_ntop($packedAddress & inet_pton('::ffff:ffff'))) {
204	$mask = '::ffff:ff00';
205	} else {
206	$mask = 'ffff:ffff:ffff:ffff:0000:0000:0000:0000';
207	}
208	$ip = inet_ntop($packedAddress & inet_pton($mask));
209
210	if ($wrappedIPv6) {
211	$ip = '['.$ip.']';
212	}
213
214	return $ip;
215	}
216	}
217