Your IP : 216.73.216.220
<?php
declare(strict_types=1);
/*
* This file is part of the TYPO3 CMS project.
*
* It is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, either version 2
* of the License, or any later version.
*
* For the full copyright and license information, please read the
* LICENSE.txt file that was distributed with this source code.
*
* The TYPO3 project - inspiring people to share!
*/
namespace TYPO3\CMS\Core\Utility;
/**
* Anonymize a given IP
*
* Inspired by https://github.com/geertw/php-ip-anonymizer
*/
class IpAnonymizationUtility
{
/**
* IPv4 netmask used to anonymize IPv4 address.
*
* 1) Mask host
* 2) Mask host and subnet
*
* @var array<int, string>
*/
public const MASKV4 = [
1 => '255.255.255.0',
2 => '255.255.0.0',
];
/**
* IPv6 netmask used to anonymize IPv6 address.
*
* 1) Mask Interface ID
* 2) Mask Interface ID and SLA ID
*
* @var array<int, string>
*/
public const MASKV6 = [
1 => 'ffff:ffff:ffff:ffff:0000:0000:0000:0000',
2 => 'ffff:ffff:ffff:0000:0000:0000:0000:0000',
];
/**
* Anonymize given IP
*
* @param string $address IP address
* @param int $mask Allowed values are 0 (masking disabled), 1 (mask host), 2 (mask host and subnet)
* @throws \UnexpectedValueException
*/
public static function anonymizeIp(string $address, int $mask = null): string
{
if ($mask === null) {
$mask = (int)$GLOBALS['TYPO3_CONF_VARS']['SYS']['ipAnonymization'];
}
if ($mask < 0 || $mask > 2) {
throw new \UnexpectedValueException(sprintf('The provided value "%d" is not an allowed value for the IP mask.', $mask), 1519739203);
}
if ($mask === 0) {
return $address;
}
if (empty($address)) {
return '';
}
$packedAddress = @inet_pton($address);
if ($packedAddress === false) {
return '';
}
$length = strlen($packedAddress);
if ($length === 4) {
$bitMask = self::MASKV4[$mask];
} elseif ($length === 16) {
$bitMask = self::MASKV6[$mask];
} else {
return '';
}
return inet_ntop($packedAddress & inet_pton($bitMask));
}
}