From ee687bea188c64ece92f3df68f9b8608db498657 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C5=A0t=C4=9Bp=C3=A1n=20Henek?= <stepan.henek@seznam.cz>
Date: Fri, 27 Sep 2013 20:44:41 +0200
Subject: [PATCH] Bugfix: auth PAM doesn't throw an exception when
 authenticating without username and password

---
 radicale/auth/PAM.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/radicale/auth/PAM.py b/radicale/auth/PAM.py
index 1660af1..565fa6c 100644
--- a/radicale/auth/PAM.py
+++ b/radicale/auth/PAM.py
@@ -36,6 +36,9 @@ GROUP_MEMBERSHIP = config.get("auth", "pam_group_membership")
 def is_authenticated(user, password):
     """Check if ``user``/``password`` couple is valid."""
 
+    if user is None or password is None:
+      return False
+
     # Check whether the user exists in the PAM system
     try:
         pwd.getpwnam(user).pw_uid