diff options
Diffstat (limited to 'libraries/cleanup.lib.php')
-rw-r--r-- | libraries/cleanup.lib.php | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/libraries/cleanup.lib.php b/libraries/cleanup.lib.php new file mode 100644 index 0000000000..2874f5a0e2 --- /dev/null +++ b/libraries/cleanup.lib.php @@ -0,0 +1,50 @@ +<?php +/* vim: set expandtab sw=4 ts=4 sts=4: */ +/** + * Functions for cleanup of user input. + * + * @package PhpMyAdmin + */ +if (! defined('PHPMYADMIN')) { + exit; +} + +/** + * 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], $GLOBALS[$key]); + } else { + // 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]); + } + } + } +} +?> |