--- ./jakarta-tomcat-catalina/catalina/src/share/org/apache/catalina/realm/RealmBase.java	Thu Oct 28 00:59:20 2004
+++ /Users/csharpl/Desktop/RealmBase.java	Wed Dec  8 13:26:07 2004
@@ -351,8 +351,11 @@
             }
         }
 
-        String serverDigest =
-            md5Encoder.encode(md5Helper.digest(valueBytes));
+        String serverDigest = null;
+        synchronized(md5Helper) {
+            serverDigest = md5Encoder.encode(md5Helper.digest(valueBytes));
+        }
+            
 
         if (log.isDebugEnabled()) {
             log.debug("Digest : " + clientDigest + " Username:" + username 
@@ -1092,8 +1095,10 @@
             }
         }
 
-        byte[] digest =
-            md5Helper.digest(valueBytes);
+        byte[] digest = null;
+        synchronized(md5Helper) {
+            digest = md5Helper.digest(valueBytes);
+        }
 
         return md5Encoder.encode(digest);
     }