--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/app/src/main/java/net/sourceforge/jsocks/Authentication.java	Thu Dec 03 11:23:55 2015 -0800
@@ -0,0 +1,34 @@
+package net.sourceforge.jsocks;
+
+/**
+ The Authentication interface provides for performing method specific
+ authentication for SOCKS5 connections.
+*/
+public interface Authentication{
+   /**
+     This method is called when SOCKS5 server have selected a particular
+     authentication method, for whch an implementaion have been registered.
+
+     <p>
+     This method should return an array {inputstream,outputstream 
+     [,UDPEncapsulation]}. The reason for that is that SOCKS5 protocol
+     allows to have method specific encapsulation of data on the socket for 
+     purposes of integrity or security. And this encapsulation should be 
+     performed by those streams returned from the method. It is also possible
+     to encapsulate datagrams. If authentication method supports such 
+     encapsulation an instance of the UDPEncapsulation interface should be
+     returned as third element of the array, otherwise either null should be
+     returned as third element, or array should contain only 2 elements.
+
+     @param methodId Authentication method selected by the server.
+     @param proxySocket Socket used to conect to the proxy.
+     @return Two or three element array containing 
+             Input/Output streams which should be used on this connection.
+             Third argument is optional and should contain an instance
+             of UDPEncapsulation. It should be provided if the authentication
+             method used requires any encapsulation to be done on the
+             datagrams.
+   */
+   Object[] doSocksAuthentication(int methodId,java.net.Socket proxySocket)
+           throws java.io.IOException;
+}