diff --git a/config b/config
index 2d93905..d5b5b27 100644
--- a/config
+++ b/config
@@ -3,7 +3,7 @@
 
 # Config file for Radicale - A simple calendar server
 #
-# Place it into /etc/radicale/config (global) 
+# Place it into /etc/radicale/config (global)
 # or ~/.config/radicale/config (user)
 #
 # The current values are the default ones
@@ -47,7 +47,7 @@ stock = utf-8
 
 [auth]
 # Authentication method
-# Value: None | htpasswd | IMAP | LDAP | PAM | courier | http | custom
+# Value: None | htpasswd | IMAP | LDAP | PAM | courier | http | remote_user | custom
 type = None
 
 # custom auth handler
@@ -69,7 +69,7 @@ ldap_attribute = uid
 # placed as X in a query of the form (&(...)X)
 # example: (objectCategory=Person)(objectClass=User)(memberOf=cn=calenderusers,ou=users,dc=example,dc=org)
 # leave empty if no additional filter is needed
-ldap_filter = 
+ldap_filter =
 # LDAP dn for initial login, used if LDAP server does not allow anonymous searches
 # Leave empty if searches are anonymous
 ldap_binddn =
diff --git a/radicale/auth/remote_user.py b/radicale/auth/remote_user.py
new file mode 100644
index 0000000..c7d789b
--- /dev/null
+++ b/radicale/auth/remote_user.py
@@ -0,0 +1,31 @@
+# -*- coding: utf-8 -*-
+#
+# This file is part of Radicale Server - Calendar Server
+# Copyright © 2012 Ehsanul Hoque
+# Copyright © 2013 Guillaume Ayoub
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Radicale.  If not, see <http://www.gnu.org/licenses/>.
+
+"""
+Trusting the HTTP server auth mechanism.
+
+"""
+
+from .. import log
+
+
+def is_authenticated(user, password):
+    """Check if ``user`` is defined and assuming it's valid."""
+    log.LOGGER.debug("Got user %r from HTTP server." % user)
+    return user is not None