Initial commit

#pma/libraries/cleanup.lib.php

@@ -0,0 +1,47 @@
+<?php
+/* vim: set expandtab sw=4 ts=4 sts=4: */
+/**
+ * Functions for cleanup of user input.
+ *
+ * @package PhpMyAdmin
+ */
+
+/**
+ * Removes all variables from request except whitelisted ones.
+ *
+ * @param string &$whitelist list of variables to allow
+ *
+ * @return void
+ * @access public
+ */
+function PMA_removeRequestVars(&$whitelist)
+{
+    // do not check only $_REQUEST because it could have been overwritten
+    // and use type casting because the variables could have become
+    // strings
+    $keys = array_keys(
+        array_merge((array)$_REQUEST, (array)$_GET, (array)$_POST, (array)$_COOKIE)
+    );
+
+    foreach ($keys as $key) {
+        if (! in_array($key, $whitelist)) {
+            unset($_REQUEST[$key], $_GET[$key], $_POST[$key]);
+            continue;
+        }
+
+        // allowed stuff could be compromised so escape it
+        // we require it to be a string
+        if (isset($_REQUEST[$key]) && ! is_string($_REQUEST[$key])) {
+            unset($_REQUEST[$key]);
+        }
+        if (isset($_POST[$key]) && ! is_string($_POST[$key])) {
+            unset($_POST[$key]);
+        }
+        if (isset($_COOKIE[$key]) && ! is_string($_COOKIE[$key])) {
+            unset($_COOKIE[$key]);
+        }
+        if (isset($_GET[$key]) && ! is_string($_GET[$key])) {
+            unset($_GET[$key]);
+        }
+    }
+}