How to authenticate on native OS in Java and without using JNI?

Question

The Java RCP application will prompt the user to enter a username and password at startup. How can I use these credentials for authentication on my native OS without using JNI to port some C libraries? Thanks!

PS. If possible, a pure Java implementation without using third-party libraries would be highly preferred.

Answer 1

AFAIK, this is simply not possible without bringing your own extensions to Java in some way - there is no Java API for this.

JNA. , - .

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EDIT: , , /, , JNDI/LDAP - AS/400 Java, .

, O/S JVM- , API.

BTW, O/S (s).

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EDIT2: , LDAP /, , , ; , .

Java-, - , , :

import java.security.*;
import java.util.*;

import javax.naming.*;
import javax.naming.directory.*;
import javax.naming.ldap.*;

...

private Hashtable                       masterEnv;          // master environment settings
private String                          authMethod;         // default authentication method

...

public void init() {
    // NOTE: Important to use a non-pooled context and a clone of the environment so that this authenticated
    //       connection is not returned to the pool and used for other operations
    masterEnv=new Hashtable();
    masterEnv.put(Context.INITIAL_CONTEXT_FACTORY,ldapFactory);
    masterEnv.put(Context.PROVIDER_URL,providerUrl);
    masterEnv.put(Context.SECURITY_PROTOCOL,secProtocol);
    masterEnv.put(Context.REFERRAL,"follow");
    masterEnv.put("com.sun.jndi.ldap.connect.pool","false");

    authMethod=System.getProperty("authenticationMethod","simple");
    }

...

private void verifyUserPassword(String ui, String pw, String am) throws NameNotFoundException, AuthenticationException, AuthenticationNotSupportedException, NamingException, NamingException {
    // ui=user ID
    // pw=password
    // am=authentication method

    DirContext      lc=null;                                // ldap context object
    Hashtable       le;                                     // ldap environment object

    if(am.length()==0) { am=authMethod; }

    le=(Hashtable)masterEnv.clone();
    le.put(Context.SECURITY_AUTHENTICATION,am);
    le.put(Context.SECURITY_PRINCIPAL     ,ui);
    le.put(Context.SECURITY_CREDENTIALS   ,pw);
    lc=new InitialDirContext(le);
    lc.close();
    }

Answer 2

JNDI LDAP ( , LDAP/Active Directory ). , .

Answer 3

In this example, http://spnego.sourceforge.net/pre_flight.html talks about HelloKDC.java, where the only thing it does is authenticate username and password.