package com;


import java.io.IOException;
import java.net.InetAddress;
import java.util.Enumeration;


import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


@SuppressWarnings("serial")
public class HeaderServlet extends HttpServlet {


@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
InetAddress.getLocalHost().toString();
String auth = request.getHeader("Authorization");
if (auth == null) {
response.setStatus(response.SC_UNAUTHORIZED);
response.setHeader("WWW-Authenticate", "NTLM");
response.flushBuffer();
return;
}
if (auth.startsWith("NTLM ")) {
byte[] msg = new sun.misc.BASE64Decoder().decodeBuffer(auth
.substring(5));
int off = 0, length, offset;
if (msg[8] == 1) {
byte z = 0;
byte[] msg1 = { (byte) 'N', (byte) 'T', (byte) 'L', (byte) 'M',
(byte) 'S', (byte) 'S', (byte) 'P', z, (byte) 2, z, z,
z, z, z, z, z, (byte) 40, z, z, z, (byte) 1,
(byte) 130, z, z, z, (byte) 2, (byte) 2, (byte) 2, z,
z, z, z, z, z, z, z, z, z, z, z };
response.setHeader("WWW-Authenticate", "NTLM "
+ new sun.misc.BASE64Encoder().encodeBuffer(msg1));
response.sendError(response.SC_UNAUTHORIZED);
return;
} else if (msg[8] == 3) {
off = 30;


length = msg[off + 17] * 256 + msg[off + 16];
offset = msg[off + 19] * 256 + msg[off + 18];
String remoteHost = new String(msg, offset, length);


length = msg[off + 1] * 256 + msg[off];
offset = msg[off + 3] * 256 + msg[off + 2];
String domain = new String(msg, offset, length);


length = msg[off + 9] * 256 + msg[off + 8];
offset = msg[off + 11] * 256 + msg[off + 10];
String username = new String(msg, offset, length);


System.out.println(username);
System.out.println(domain);
System.out.println(remoteHost);
}
}
}


}