From a8484372848231a43d75c92cc12057cde771e3f3 Mon Sep 17 00:00:00 2001
From: Florian Schmaus <flo@geekplace.eu>
Date: Fri, 14 Nov 2014 21:02:18 +0100
Subject: [PATCH] Make digest() in EntityCapsManager synchronized

Fixes SMACK-617
---
 .../java/org/jivesoftware/smackx/caps/EntityCapsManager.java | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/smack-extensions/src/main/java/org/jivesoftware/smackx/caps/EntityCapsManager.java b/smack-extensions/src/main/java/org/jivesoftware/smackx/caps/EntityCapsManager.java
index 6bba70e3f..6af110c20 100644
--- a/smack-extensions/src/main/java/org/jivesoftware/smackx/caps/EntityCapsManager.java
+++ b/smack-extensions/src/main/java/org/jivesoftware/smackx/caps/EntityCapsManager.java
@@ -654,7 +654,10 @@ public class EntityCapsManager extends Manager {
         // encoded using Base64 as specified in Section 4 of RFC 4648
         // (note: the Base64 output MUST NOT include whitespace and MUST set
         // padding bits to zero).
-        byte[] digest = md.digest(sb.toString().getBytes());
+        byte[] digest;
+        synchronized(md) {
+            digest = md.digest(sb.toString().getBytes());
+        }
         return Base64.encodeBytes(digest);
     }