Sanatize SVG files when uploading

src/Services/Attachments/SVGSanitizer.php

@@ -0,0 +1,58 @@
+<?php
+/*
+ * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
+ *
+ *  Copyright (C) 2019 - 2025 Jan Böhmer (https://github.com/jbtronics)
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as published
+ *  by the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+
+namespace App\Services\Attachments;
+
+use Rhukster\DomSanitizer\DOMSanitizer;
+
+class SVGSanitizer
+{
+
+    /**
+     * Sanitizes the given SVG string by removing any potentially harmful content (like inline scripts).
+     * @param  string  $input
+     * @return string
+     */
+    public function sanitizeString(string $input): string
+    {
+        return (new DOMSanitizer(DOMSanitizer::SVG))->sanitize($input);
+    }
+
+    /**
+     * Sanitizes the given SVG file by removing any potentially harmful content (like inline scripts).
+     * The sanitized content is written back to the file.
+     * @param  string  $filepath
+     */
+    public function sanitizeFile(string $filepath): void
+    {
+        //Open the file and read the content
+        $content = file_get_contents($filepath);
+        if ($content === false) {
+            throw new \RuntimeException('Could not read file: ' . $filepath);
+        }
+        //Sanitize the content
+        $sanitizedContent = $this->sanitizeString($content);
+        //Write the sanitized content back to the file
+        file_put_contents($filepath, $sanitizedContent);
+    }
+}