On a similar vein to the entries I posted a couple of months back, here is an example of how to use JAAS to get the current user credentials. It uses the NTLoginModule default implementation, with the following parameters in a config file called ntlogin.config:
NTLMTest {
com.sun.security.auth.module.NTLoginModule Required debug=true;
};
And here’s the code. Run it with the parameter -Djava.security.auth.login.config=ntlogin.config to test.
package uk.co.researchkitchen.auth.jaas;
import javax.security.auth.Subject;
import javax.security.auth.login.LoginContext;
import javax.security.auth.login.LoginException;
import com.sun.security.auth.callback.TextCallbackHandler;
public class JaasNTCredentialsTest {
LoginContext loginContext = null;
public static void main(String[] args) {
JaasNTCredentialsTest jnt = new JaasNTCredentialsTest();
jnt.doAuth();
}
public void doAuth() {
try {
loginContext = new LoginContext("NTLMTest", new TextCallbackHandler());
loginContext.login();
} catch (LoginException e) {
e.printStackTrace();
}
Subject subject = loginContext.getSubject();
}
}
Incidentally, if you just want to get the user name, you can use something like this:
Set
for (Principal p : principals) {
if (p instanceof NTUserPrincipal) {
System.out.println("User name: " + p.getName());
}
}