Please help me!!! error in run time about connecting ldap in Tomcat 4

Question

I had a class which used to connect to ldap which is bellow:
import java.util.*;
import javax.naming.*;
import javax.naming.directory.*;
public class ADLogin
protected Hashtable env = new Hashtable();
String _hostname="sisqn074";
String _port="389";
public ADLogin()
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.SECURITY_AUTHENTICATION, "simple");
public boolean authenticate(String username , String password, String domainName)
boolean b=false;
try{
env.put(Context.SECURITY_PRINCIPAL, username.trim() +domainName.trim());
env.put(Context.SECURITY_CREDENTIALS, password);
InitialContext ctx = new InitialDirContext(env);
b=true;
catch( AuthenticationException e){
e.printStackTrace();
b=false;
catch(NamingException e){
e.printStackTrace();
b=false;
finally{
//System.out.println("finally");
return b;
//set port
public void setPort(String aport){
_port=aport;
//set host name
public void setHostname(String aName){
_hostname=aName;
//initialize
public boolean initialize(String aHostname,String aPort)
setPort(aPort);
setHostname(aHostname);
env.put(Context.PROVIDER_URL, "ldap://" + hostname + ":" + port);
return true;
and I run those codes in tomcat 4.1.21
now I have a problem , when I use the authenticate method, I use a invalid username which should triger an exception when binding, if the passoword is null , there are no expections and the authenticate would return true on invalid username.
Those codes is ok in IBM WeBsphere.
Who can help me ?
please and thanks.

Answer 1

hi
not passing the password, on some directory servers provide u wid an
annonymous bind and thats what is happening.
better get this value checked by a javascript for not allowing
empty password fields
cheers
v0d00