From 9caf7e3c4588b9e5f3c4471e0ba6597a49a44941 Mon Sep 17 00:00:00 2001
From: steckbrief <steckbrief@chefmail.de>
Date: Mon, 19 Sep 2016 12:48:23 +0200
Subject: add access check to i.php for every file request

---
 include/access_check.inc.php | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 include/access_check.inc.php

(limited to 'include/access_check.inc.php')

diff --git a/include/access_check.inc.php b/include/access_check.inc.php
new file mode 100644
index 000000000..26f77afa9
--- /dev/null
+++ b/include/access_check.inc.php
@@ -0,0 +1,41 @@
+<?php
+function doError($code, $str) {
+  set_status_header($code);
+  echo $str ;
+  exit();
+}
+
+/**
+ * exits if there is no access.
+ */
+function checkAccess() {
+  global $page;
+
+  $picid = '';
+  $query = 'SELECT id FROM '.IMAGES_TABLE.' WHERE path=\''.$page['src_location'].'\';';
+  $result = pwg_query($query);
+  if (!is_object($result)) {
+    header('Location:'.$_SERVER['PHP_SELF'].'?'.$_SERVER['QUERY_STRING']);
+  }
+  if (($row = pwg_db_fetch_assoc($result))) {
+    if (isset($row['id'])) {
+      $picid = $row['id'];
+    } else {
+      doError(404, 'Requested id not found');
+    }
+  } else {
+    doError(404, 'Requested id not found');
+  }
+  
+  $query = 'SELECT id FROM '.CATEGORIES_TABLE.' INNER JOIN '.IMAGE_CATEGORY_TABLE.' ON category_id = id WHERE image_id = '.$picid.' '.get_sql_condition_FandF(
+    array(
+        'forbidden_categories' => 'category_id',
+        'forbidden_images' => 'image_id',
+      ),
+    '    AND'
+    ).'
+    LIMIT 1;';
+  if (pwg_db_num_rows(pwg_query($query)) < 1) {
+    doError(401, 'Access denied');
+  }
+}
\ No newline at end of file
-- 
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