From 447558c5a64e28d0ac78edf9c5166c63b4a8b893 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Ond=C5=99ej=20=C5=BDi=C5=BEka?=
 <unknown@community.igniterealtime.org>
Date: Wed, 29 Jul 2009 22:56:12 +0200
Subject: [PATCH] [FIX] SMACK-264: NPE in SASLMechanism.java

http://www.igniterealtime.org/issues/browse/SMACK-264

Signed-off-by: oezbek <christopher.oezbek@fu-berlin.de>
---
 source/org/jivesoftware/smack/sasl/SASLMechanism.java | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/source/org/jivesoftware/smack/sasl/SASLMechanism.java b/source/org/jivesoftware/smack/sasl/SASLMechanism.java
index b41c23b1..3d787003 100644
--- a/source/org/jivesoftware/smack/sasl/SASLMechanism.java
+++ b/source/org/jivesoftware/smack/sasl/SASLMechanism.java
@@ -149,10 +149,16 @@ public abstract class SASLMechanism implements CallbackHandler {
             response = sc.evaluateChallenge(null);
         }
 
-        String authenticationText = Base64.encodeBytes(response,Base64.DONT_BREAK_LINES);
-        if(authenticationText.equals("")) {
-            authenticationText = "=";
-        }
+		String authenticationText;
+		if(response == null) {
+		    authenticationText = null;
+		} else {
+			authenticationText = Base64.encodeBytes(response,Base64.DONT_BREAK_LINES);
+		}
+		
+		if(authenticationText == null || authenticationText.equals("")) {
+			authenticationText = "=";
+		}
 
         stanza.append("<response xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\">");
         stanza.append(authenticationText);
-- 
2.11.4.GIT