Retrieve NT Authentication details using java

Need to get the OS user name and password of the remote client machine from which accesses the server Application in my machine.
How to do this using java? Is there any java API to get this?
Also tried the NTLM code but its not working.
Any code will be appreciated.

Need to get the OS user name and password of the
remote client machine from which accesses the
server Application in my machine.
How to do this using java? Is there any java API to
get this?
Also tried the NTLM code but its not working.
Any code will be appreciated.Forget it. You can't get the password unless you ask the user for it.
Kaj

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Fetching NT Authentication details using java

I am accesing a jsp page of tomcat server in my machine from a browser client in another machine.I have to fetch the OS User name with which the user logged in the client machine using java.I tried using request.getRemoteHost() but it returned null.
I tried using NTLM .This is the code which i used
<%@ page language="java" import="java.io.*,java.util.*,java.lang.* " %>
<%@ page import="org.castor.util.*"%>
<%
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);
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 out.println("RemoteHost:"+remoteHost+" ");
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%>But it didnt work.Should i configure my environment in any way for NTLM to work?
Is there anyother way to do this.Any code will be appreciated.
Thanks,
Vignesh

JSP's execute on the server and not on the client machine. So I'm not sure how you exect to get details from the client here. Not to mention that JSP you wrote is pretty nasty IMO.

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How to set proxy authentication using java properties on the command line, or in Netbeans (Project => Properties
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 System.exit(1);
 } finally {
 try {
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 } catch (IOException ioe) {
}However, it generated the following message when run behind the firewall:
cd C:\Documents and Settings\abc\DnldURL\build\classes
java -cp . DnldURLWithoutUsingProxy
Oops- an IOException happened.
java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:305)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:171)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:158)
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at java.net.Socket.connect(Socket.java:402)
at sun.net.NetworkClient.doConnect(NetworkClient.java:139)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:402)
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at sun.net.www.http.HttpClient.<init>(HttpClient.java:306)
at sun.net.www.http.HttpClient.<init>(HttpClient.java:267)
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at sun.net.www.http.HttpClient.New(HttpClient.java:320)
at sun.net.www.http.HttpClient.New(HttpClient.java:315)
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at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:487)
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I have also tried the command without much luck either:
java -cp . -Dhttp.proxyHost=wwwproxy -Dhttp.proxyPort=80 DnldURLWithoutUsingProxy
Oops- an IOException happened.
java.io.IOException: Server returned HTTP response code: 407 for URL: http://www.yahoo.com.au/index.html
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1245) at java.net.URL.openStream(URL.java:1009) at DnldURLWithoutUsingProxy.main(DnldURLWithoutUsingProxy.java:17)
All outgoing traffic needs to use the proxy wwwproxy (alias to http://proxypac/proxy.pac) on port 80, where it will prompt for valid authentication before allowing to get through.
There is no problem pinging www.yahoo.com from this system.
I am running jdk1.6.0_03, Netbeans 6.0 on Windows XP platform.
I have tried Greg Sporar's Blog on setting the JVM option in Sun Java System Application Server (GlassFish) and
Java Control Panel - Use browser settings without success.
Thanks,
George

Hi All,
How to set proxy authentication using java properties on the command line, or in Netbeans (Project => Properties
=> Run => Arguments). Below is a simple URL data extract program which works in absence of firewall:
import java.io.*;
import java.net.*;
public class DnldURLWithoutUsingProxy {
 public static void main (String[] args) {
 URL u;
 InputStream is = null;
 DataInputStream dis;
 String s;
 try {
 u = new URL("http://www.yahoo.com.au/index.html");
 is = u.openStream(); // throws an IOException
 dis = new DataInputStream(new BufferedInputStream(is));
 BufferedReader br = new BufferedReader(new InputStreamReader(dis));
 String strLine;
 //Read File Line By Line
 while ((strLine = br.readLine()) != null) {
 // Print the content on the console
 System.out.println (strLine);
 //Close the input stream
 dis.close();
 } catch (MalformedURLException mue) {
 System.out.println("Ouch - a MalformedURLException happened.");
 mue.printStackTrace();
 System.exit(1);
 } catch (IOException ioe) {
 System.out.println("Oops- an IOException happened.");
 ioe.printStackTrace();
 System.exit(1);
 } finally {
 try {
 is.close();
 } catch (IOException ioe) {
}However, it generated the following message when run behind the firewall:
cd C:\Documents and Settings\abc\DnldURL\build\classes
java -cp . DnldURLWithoutUsingProxy
Oops- an IOException happened.
java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:305)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:171)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:158)
at java.net.Socket.connect(Socket.java:452)
at java.net.Socket.connect(Socket.java:402)
at sun.net.NetworkClient.doConnect(NetworkClient.java:139)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:402)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:618)
at sun.net.www.http.HttpClient.<init>(HttpClient.java:306)
at sun.net.www.http.HttpClient.<init>(HttpClient.java:267)
at sun.net.www.http.HttpClient.New(HttpClient.java:339)
at sun.net.www.http.HttpClient.New(HttpClient.java:320)
at sun.net.www.http.HttpClient.New(HttpClient.java:315)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:510)
at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:487)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:615) at java.net.URL.openStream(URL.java:913) at DnldURLWithoutUsingProxy.main(DnldURLWithoutUsingProxy.java:17)
I have also tried the command without much luck either:
java -cp . -Dhttp.proxyHost=wwwproxy -Dhttp.proxyPort=80 DnldURLWithoutUsingProxy
Oops- an IOException happened.
java.io.IOException: Server returned HTTP response code: 407 for URL: http://www.yahoo.com.au/index.html
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1245) at java.net.URL.openStream(URL.java:1009) at DnldURLWithoutUsingProxy.main(DnldURLWithoutUsingProxy.java:17)
All outgoing traffic needs to use the proxy wwwproxy (alias to http://proxypac/proxy.pac) on port 80, where it will prompt for valid authentication before allowing to get through.
There is no problem pinging www.yahoo.com from this system.
I am running jdk1.6.0_03, Netbeans 6.0 on Windows XP platform.
I have tried Greg Sporar's Blog on setting the JVM option in Sun Java System Application Server (GlassFish) and
Java Control Panel - Use browser settings without success.
Thanks,
George

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Retrieve NT Authentication details using java

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