Add config variable 'proxy_whitelist'

Felix Eckhofer

2014-03-26 ef721fc430fbb19da13060105577bf7605606b81

 program/lib/Roundcube/rcube_utils.php

@@ -598,7 +598,9 @@
        if (!empty($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) != 'off') {
            return true;
        }
        if (!empty($_SERVER['HTTP_X_FORWARDED_PROTO']) && strtolower($_SERVER['HTTP_X_FORWARDED_PROTO']) == 'https') {
        if (!empty($_SERVER['HTTP_X_FORWARDED_PROTO'])
            && strtolower($_SERVER['HTTP_X_FORWARDED_PROTO']) == 'https'
            && in_array($_SERVER['REMOTE_ADDR'], rcube::get_instance()->config->get('proxy_whitelist', array()))) {
            return true;
        }
        if ($port && $_SERVER['SERVER_PORT'] == $port) {
@@ -683,13 +685,22 @@
     */
    public static function remote_addr()
    {
        if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
            $hosts = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR'], 2);
            return $hosts[0];
        }
        // Check if any of the headers are set first to improve performance
        if (!empty($_SERVER['HTTP_X_FORWARDED_FOR']) || !empty($_SERVER['HTTP_X_REAL_IP'])) {
            $proxy_whitelist = rcube::get_instance()->config->get('proxy_whitelist', array());
            if (in_array($_SERVER['REMOTE_ADDR'], $proxy_whitelist)) {
                if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
                    foreach(array_reverse(explode(',', $_SERVER['HTTP_X_FORWARDED_FOR'])) as $forwarded_ip) {
                        if (!in_array($forwarded_ip, $proxy_whitelist)) {
                            return $forwarded_ip;
                        }
                    }
                }

        if (!empty($_SERVER['HTTP_X_REAL_IP'])) {
            return $_SERVER['HTTP_X_REAL_IP'];
                if (!empty($_SERVER['HTTP_X_REAL_IP'])) {
                    return $_SERVER['HTTP_X_REAL_IP'];
                }
            }
        }

        if (!empty($_SERVER['REMOTE_ADDR'])) {