TYPO3 v15 dev-main snapshot ()

2026-08-10 22:31:09 +02:00
commit af8cc155b5
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+<?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 '';
+        }
+        $packedBitMask = inet_pton($bitMask);
+        if ($packedBitMask === false) {
+            return '';
+        }
+        return inet_ntop($packedAddress & $packedBitMask);
+    }
+}