ProxyServer
Class ProxyAuthenticator

java.lang.Object
  ProxyServer.ProxyAuthenticator

All Implemented Interfaces:

ServerAuthenticator

public class ProxyAuthenticator
extends java.lang.Object
implements ServerAuthenticator

Constructor Summary

ProxyAuthenticator()
Creates new instance of the ServerAuthenticatorNone.

ProxyAuthenticator(java.io.InputStream in, java.io.OutputStream out)
Constructs new ServerAuthenticatorNone object suitable for returning from the startSession function.

Method Summary

boolean	checkRequest(java.net.DatagramPacket dp, boolean out) Allways returns true.
boolean	checkRequest(ProxyMessage msg) Allways returns true.
void	endSession() Does nothing.
java.io.InputStream	getInputStream() Get input stream.
java.io.OutputStream	getOutputStream() Get output stream.
UDPEncapsulation	getUdpEncapsulation() Allways returns null.
static boolean	selectSocks5Authentication(java.io.InputStream in, java.io.OutputStream out, int methodId) Convinience routine for selecting SOCKSv5 authentication.
ServerAuthenticator	startSession(java.net.Socket s) Grants access to everyone.Removes authentication related bytes from the stream, when a SOCKS5 connection is being made, selects an authentication NONE.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ProxyAuthenticator

public ProxyAuthenticator()

Creates new instance of the ServerAuthenticatorNone.

ProxyAuthenticator

public ProxyAuthenticator(java.io.InputStream in,
                          java.io.OutputStream out)

Constructs new ServerAuthenticatorNone object suitable for returning from the startSession function.

Parameters:

in - Input stream to return from getInputStream method.

out - Output stream to return from getOutputStream method.

Method Detail

startSession

public ServerAuthenticator startSession(java.net.Socket s)
                                 throws java.io.IOException

Grants access to everyone.Removes authentication related bytes from the stream, when a SOCKS5 connection is being made, selects an authentication NONE.

Specified by:

startSession in interface ServerAuthenticator

Parameters:

s - Accepted Socket.

Returns:

An instance of ServerAuthenticator to be used for this connection or null

Throws:

java.io.IOException

getInputStream

public java.io.InputStream getInputStream()

Get input stream.

Specified by:

getInputStream in interface ServerAuthenticator

Returns:

Input stream speciefied in the constructor.

getOutputStream

public java.io.OutputStream getOutputStream()

Get output stream.

Specified by:

getOutputStream in interface ServerAuthenticator

Returns:

Output stream speciefied in the constructor.

getUdpEncapsulation

public UDPEncapsulation getUdpEncapsulation()

Allways returns null.

Specified by:

getUdpEncapsulation in interface ServerAuthenticator

Returns:

null

checkRequest

public boolean checkRequest(ProxyMessage msg)

Allways returns true.

Specified by:

checkRequest in interface ServerAuthenticator

Parameters:

msg - Request message.

Returns:

true to grant request, false to reject it.

checkRequest

public boolean checkRequest(java.net.DatagramPacket dp,
                            boolean out)

Allways returns true.

Specified by:

checkRequest in interface ServerAuthenticator

out - If true the datagram is being send out(from the client), otherwise it is an incoming datagram.

Returns:

True to forward datagram false drop it silently.

endSession

public void endSession()

Does nothing.

Specified by:

endSession in interface ServerAuthenticator

selectSocks5Authentication

public static boolean selectSocks5Authentication(java.io.InputStream in,
                                                 java.io.OutputStream out,
                                                 int methodId)
                                          throws java.io.IOException

Convinience routine for selecting SOCKSv5 authentication.

This method reads in authentication methods that client supports, checks wether it supports given method. If it does, the notification method is written back to client, that this method have been chosen for authentication. If given method was not found, authentication failure message is send to client ([5,FF]).

Parameters:

in - Input stream, version byte should be removed from the stream before calling this method.

out - Output stream.

methodId - Method which should be selected.

Returns:

true if methodId was found, false otherwise.

Throws:

java.io.IOException