From 32ccde08d242f4ca3257d6bb800153b36d1e9325 Mon Sep 17 00:00:00 2001
From: Nick Couchman <vnick@apache.org>
Date: Sat, 28 Oct 2017 14:19:37 -0400
Subject: [PATCH] GUACAMOLE-362: Avoid NullPointerException when closing input
 stream.

---
 .../guacamole/auth/cas/conf/PrivateKeyGuacamoleProperty.java   | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/extensions/guacamole-auth-cas/src/main/java/org/apache/guacamole/auth/cas/conf/PrivateKeyGuacamoleProperty.java b/extensions/guacamole-auth-cas/src/main/java/org/apache/guacamole/auth/cas/conf/PrivateKeyGuacamoleProperty.java
index d71ae1a8e..455f17729 100644
--- a/extensions/guacamole-auth-cas/src/main/java/org/apache/guacamole/auth/cas/conf/PrivateKeyGuacamoleProperty.java
+++ b/extensions/guacamole-auth-cas/src/main/java/org/apache/guacamole/auth/cas/conf/PrivateKeyGuacamoleProperty.java
@@ -81,7 +81,8 @@ public abstract class PrivateKeyGuacamoleProperty implements GuacamoleProperty<P
                 throw new GuacamoleServerException("Key is not in expected PKCS8 encoding.", e);
             }
             finally {
-                keyStreamIn.close();
+                if (keyStreamIn != null)
+                    keyStreamIn.close();
             }
         }
         catch (IOException e) {