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Program to validate a user against LDAP

syntel retail
Posts: 2
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Can any one help to create a simple program to validate a user against LDAP?

I am using OPEN DS as my LDAP Server and JNDI API to access LDAP Server for authorization.

After creating a new user in Open DS, I created an html with username & password as textfield. Then I created a servlet which connected succesfully to LDAP Server.
However, I am getting the password from LDAP Server for the current user in encrypted format and hence my authorization always fails.

My question is, how to write a program using JNDI API to authorize an user?

This is my code:
package com.login.servlet;

import javax.naming.Context;
import javax.naming.NamingException;
import javax.naming.directory.Attributes;
import javax.naming.directory.DirContext;
import javax.naming.ldap.InitialLdapContext;

public class LoginServlet extends HTTPServlet{

private static DirContext createLdapContext() throws NamingException {
Hashtable env = new Hashtable();

env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.PROVIDER_URL, "ldap://");
env.put(Context.SECURITY_AUTHENTICATION, "simple");
env.put(Context.SECURITY_PRINCIPAL, "cn=Directory Manager");
env.put(Context.SECURITY_CREDENTIALS, "opends");

return new InitialLdapContext(env, null);

public void validateUser(HttpServletRequest request, SessionVO sessionVO) {
try {
String un=request.getParameter("username");
String pwd = request.getParameter("password");

DirContext dirContext = createLdapContext();
Attributes attrs = dirContext.getAttributes("uid="+un+",ou=People,dc=example,dc=com");
String actualPwd = attrs.get("userPassword").toString();

System.out.println("Password correct");
}else {
System.out.println("Password worng");
} catch (NamingException e) {
// TODO Auto-generated catch block
}catch (Exception e) {
// TODO Auto-generated catch block

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