mirror of
https://codeberg.org/PostERG/xamxam.git
synced 2026-05-07 03:29:19 +02:00
a2b1ff5f41
Items resolved: - #3 (HIGH): Move file uploads outside webroot to STORAGE_ROOT (/var/www/posterg/storage). Uploads were previously stored in public/admin/actions/data/ which is web-accessible. - #4 (HIGH): Align file paths and add media.php controller. DB paths are now storage-relative (theses/YEAR/ID/file, covers/file). New public/media.php serves files with path-traversal jail, MIME allow-list, and proper caching headers. memoire.php and search.php updated to use /media.php?path=. Also fixed: cover images were never recorded in thesis_files (broken INSERT). - #5 (HIGH): RateLimit::getClientIdentifier() now uses REMOTE_ADDR only. HTTP_X_FORWARDED_FOR and HTTP_CLIENT_IP are attacker-controlled headers that allowed unlimited rate-limit bypass by rotating spoofed IPs. - #6 (HIGH): Port public/admin/.htaccess security rules to nginx/posterg.conf. Apache .htaccess directives are silently ignored by nginx; none were active. CSP added to /admin/ location block, .log file denial added globally, autoindex off made explicit. Documented in nginx/HTACCESS_TO_NGINX.md. Supporting changes: - config/bootstrap.php: add STORAGE_ROOT constant - nginx/SECURITY_HEADERS.md: updated to reflect admin CSP and pending public CSP - docs/TODO.SECURITY.md: items #3-6 moved to resolved; priority order updated
91 lines
2.6 KiB
PHP
91 lines
2.6 KiB
PHP
<?php
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/**
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* Media file serving controller
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*
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* Serves uploaded files that are stored outside the webroot (STORAGE_ROOT).
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* This is the sole access point for thesis files, covers, and annexes — they
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* are never exposed as direct filesystem paths from the web server.
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*
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* Security:
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* - Strict character whitelist on the path parameter (no path traversal)
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* - realpath() jail: resolved path must stay inside STORAGE_ROOT
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* - MIME type verified against an allow-list before serving
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*/
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require_once __DIR__ . '/../config/bootstrap.php';
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// --- 1. Extract and validate the requested path -------------------------------
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$requestedPath = $_GET['path'] ?? '';
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// Only allow safe characters: letters, digits, forward slashes, dots, hyphens, underscores.
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// This explicitly rejects null bytes, backslashes, and sequences like "../".
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if (!preg_match('#^[a-zA-Z0-9/_\-.]+$#', $requestedPath) || $requestedPath === '') {
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http_response_code(400);
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exit;
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}
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// --- 2. Resolve full filesystem path and enforce storage jail -----------------
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$storageRoot = defined('STORAGE_ROOT') ? STORAGE_ROOT : '/var/www/posterg/storage';
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$fullPath = $storageRoot . '/' . $requestedPath;
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$realStorage = realpath($storageRoot);
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$realFull = realpath($fullPath);
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if (
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$realFull === false
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|| $realStorage === false
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|| strpos($realFull, $realStorage . '/') !== 0
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) {
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http_response_code(404);
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exit;
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}
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if (!is_file($realFull)) {
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http_response_code(404);
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exit;
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}
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// --- 3. Verify MIME type from file content (not extension) --------------------
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$finfo = new finfo(FILEINFO_MIME_TYPE);
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$mimeType = $finfo->file($realFull);
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$allowedMimes = [
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'image/jpeg',
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'image/png',
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'image/gif',
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'application/pdf',
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'video/mp4',
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'application/zip',
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];
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if (!in_array($mimeType, $allowedMimes, true)) {
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http_response_code(403);
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exit;
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}
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// --- 4. Send response headers -------------------------------------------------
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header('Content-Type: ' . $mimeType);
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header('Content-Length: ' . filesize($realFull));
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header('X-Content-Type-Options: nosniff');
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$ext = strtolower(pathinfo($realFull, PATHINFO_EXTENSION));
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if (in_array($ext, ['jpg', 'jpeg', 'png', 'gif'], true)) {
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// Images: cache publicly for 7 days
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header('Cache-Control: public, max-age=604800');
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} elseif ($ext === 'pdf') {
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// PDFs: cache for 1 day, display inline
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header('Cache-Control: public, max-age=86400');
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header('Content-Disposition: inline');
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} else {
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// Everything else: no public caching
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header('Cache-Control: private, no-store');
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}
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// --- 5. Stream file -----------------------------------------------------------
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readfile($realFull);
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