diff -r 000000000000 -r 6474c204b198 mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/auth/NTLMEngine.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/auth/NTLMEngine.java	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,70 @@
+/*
+ * ====================================================================
+ *
+ *  Licensed to the Apache Software Foundation (ASF) under one or more
+ *  contributor license agreements.  See the NOTICE file distributed with
+ *  this work for additional information regarding copyright ownership.
+ *  The ASF licenses this file to You under the Apache License, Version 2.0
+ *  (the "License"); you may not use this file except in compliance with
+ *  the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ *
+ */
+
+package ch.boye.httpclientandroidlib.impl.auth;
+
+/**
+ * Abstract NTLM authentication engine. The engine can be used to
+ * generate Type1 messages and Type3 messages in response to a
+ * Type2 challenge.
+ *
+ * @since 4.0
+ */
+public interface NTLMEngine {
+
+    /**
+     * Generates a Type1 message given the domain and workstation.
+     *
+     * @param domain Optional Windows domain name. Can be <code>null</code>.
+     * @param workstation Optional Windows workstation name. Can be
+     *  <code>null</code>.
+     * @return Type1 message
+     * @throws NTLMEngineException
+     */
+    String generateType1Msg(
+            String domain,
+            String workstation) throws NTLMEngineException;
+
+    /**
+     * Generates a Type3 message given the user credentials and the
+     * authentication challenge.
+     *
+     * @param username Windows user name
+     * @param password Password
+     * @param domain Windows domain name
+     * @param workstation Windows workstation name
+     * @param challenge Type2 challenge.
+     * @return Type3 response.
+     * @throws NTLMEngineException
+     */
+    String generateType3Msg(
+            String username,
+            String password,
+            String domain,
+            String workstation,
+            String challenge) throws NTLMEngineException;
+
+}