Authentication on Active Directory using JNDI (A Proffessional Appraoch)

Question

I am using following code for getting authenticated on Active Directory by user logon name.
Can any one tell me a more proffessional and fool proof appraoch for authenticating a user on Active Dir through my web interface ???
thanks in advance
* Created on Nov 10, 2004
package auth;
import java.util.Hashtable;
import javax.naming.AuthenticationException;
import javax.naming.Context;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.DirContext;
import javax.naming.directory.InitialDirContext;
import javax.naming.directory.SearchControls;
import javax.naming.directory.SearchResult;
* @author Tushar Agrawal
* Created On Nov 10, 2004
public class UserAuthentication {
     public UserAuthentication() {
          super();
     public NamingEnumeration loginToActiveDirectory(
          String logonName,
          String password,
          String domain) {
          boolean success = false;
          NamingEnumeration attrs = null;
          Hashtable env = new Hashtable(11);
          env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
          env.put(Context.SECURITY_AUTHENTICATION, "simple");
          env.put(Context.PROVIDER_URL, "ldap://domain:389/dc=SECLORE,dc=com");
          env.put(Context.SECURITY_PRINCIPAL, logonName + "@" + domain);
          env.put(Context.SECURITY_CREDENTIALS, password);
          //env.put(Context.SECURITY_PROTOCOL, "ssl");
          env.put("java.naming.ldap.version", "3");
          env.put(Context.REFERRAL, "follow");
          try {
               String base = "";
               DirContext ctx = new InitialDirContext(env);
               SearchControls controls = new SearchControls();
               controls.setSearchScope(SearchControls.SUBTREE_SCOPE);
               controls.setReturningAttributes(
                    new String[] {
                         "sAMAccountName",
                         "userPrincipalName",
                         "displayName",
                         "memberOf",
                         "objectSid",
                         "title" });
               NamingEnumeration e =
                    ctx.search(base, "sAMAccountName=" + logonName, controls);
               if (e.hasMore()) {
                    SearchResult r = (SearchResult) e.next();
                    attrs = r.getAttributes().getAll();
                    /*while (attrs.hasMore()) {
                         System.out.println(attrs.next());
                    ctx.close();
          } catch (AuthenticationException e) {
               System.err.println("Problem getting attribute: " + e);
               success = false;
          } catch (NamingException e) {
               System.err.println("Problem getting attribute: " + e);
               success = false;
          return attrs;
tushar agrawal

Answer 1

You''l find more info at :
http://jakarta.apache.org/tomcat/tomcat-5.5-doc/catalina/funcspecs/fs-jndi-realm.html
http://jakarta.apache.org/tomcat/tomcat-4.0-doc/realm-howto.html
That's the right way to do it.