Java Ldap

 Here is a simple Java code to validate user login with Windows Active Directory. Tested with
jldap-4.3.jar

 

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.logging.Logger;

import com.novell.ldap.LDAPConnection;
import com.novell.ldap.LDAPConstraints;
import com.novell.ldap.LDAPException;


public class LdapCommand {
 public LdapCommand() {
  
 }
 public static void main(String [] args) {
  if (args.length < 5 || args.length > 6) {
   System.out.println("Usage: java -jar ./LdapCommand.jar "
     + "     ");
   System.out.println("Example: java -jar ./LdapCommand.jar mailer01.ad.yourdomain.com 3 389 @ad.yourdomain.com yourname");
   System.exit(0);
  }
  String password = null;
  if (args.length == 6) 
   password=args[5];
  if (password == null || password.trim().equals("")) {
   System.out.println("Please enter password:");
      BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      try {
        password = br.readLine();
      } catch (IOException ioe) {
          System.out.println("IO error trying to read your password!");
          System.exit(1);
      }
  }
     System.out.println("LdapServer:" + args[0]);
     System.out.println("LdapVersion:" + args[1]);
     System.out.println("LdapPort:" + args[2]);
     System.out.println("LdapDomain:" + args[3]);
     System.out.println("LdapUser:" + args[4]);
     System.out.println("LdapPassword:*******");
     
     int port=0;
     try {
      port=new Integer(args[2]);
     } catch (Exception e) {
      System.out.println("incorrect port");
      System.exit(3);
     }
     int version=0;
     try {
      version=new Integer(args[1]);
     } catch (Exception e) {
      System.out.println("incorrect version");
      System.exit(3);
     }
     if (args[3].indexOf("@") == -1) {
      System.out.println("Incorrect domain (e.g. @ad.yourdomain.com is the correct domain");
      System.exit(2);
     }
  LDAPConnection conn=null;
  try {
   conn = new LDAPConnection();
   LDAPConstraints ldapConstraints = new LDAPConstraints();
   ldapConstraints.setReferralFollowing(true);
   conn.setConstraints(ldapConstraints);
   System.out.println("Connecting to ldap server");
   conn.connect(args[0], port);
   System.out.println("Binding with ldap server");
   conn.bind(version, args[4] + args[3], password.getBytes());
   System.out.println("AD authentication succeeded for user=" + args[4]);
  } catch (LDAPException le) {
   System.out.println("failed login for user=" + args[4]);
   le.printStackTrace();
  } catch (Exception e) {
   System.out.println("failed login for user=" + args[4]);
   e.printStackTrace();
  } finally {
   try {
    conn.disconnect();
   } catch (Exception e) {
    System.out.println("cannot disconnect ");
    e.printStackTrace();
   };
  }
 }
}