Authonticate against Active Directory

[Rajesh99]

I have my application on Solaris with Tomcat. Now I want to do following things:

when this application starts prompt user for his user name/password, if they typed these matching the ones in Active Directory (the users run this application on window XP on company's hosted active directory) then user should be allowed in to run the application. This is an extra layer of protection - as if someone left his computer on, no one in his absence should be able to use it since he was logged in first at the begin of day etc.

Really I am looking for a way to authintiacte a user against Active Directory usernames/password then creating another list of Oracle users in our database. I have following code but does not work, do I need to do some changes in Tomcat to make it work. I am totally in new area here,help.:


<%@ page import="javax.naming.*" %>
<%@ page import="javax.directory.*" %>
<p><h1>Network Windows USERNAME without any login (ie)</h1></p>
<%
try
{
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY,
"com.sun.jndi.ldap.LdapCtxFactory");

env.put(Context.PROVIDER_URL,
"ldap://" + getProperty("SERVER") + ":" +
getProperty("PORT"));

env.put(Context.SECURITY_PRINCIPAL,
getProperty("USER_RDN") + "," +
getProperty("BASE_DN"));
env.put(Context.SECURITY_CREDENTIALS,
getProperty("USER_PASSWORD"));

DirContext ctx = new InitialDirContext(env);

ctx.getAttributes(getProperty("BASE_DN"));

ctx.close();

info("connection_succeeded");
}
catch (CommunicationException comEx)
{
error(MessageResource.getMessage("communication_exception",
comEx.getMessage()));
return false;
}
catch (AuthenticationException authEx)
{
error(MessageResource.getMessage("authentication_exception",
authEx.getMessage()));
return false;
}
catch (NamingException nameEx)
{
error(MessageResource.getMessage("naming_exception",
nameEx.toString()));
return false;
}

return true;

%></BODY>

Any ideas?