|
|
Re: LDAP
|
Posted: Oct 29, 2003 11:11 AM
|
|
LDAP, Lightweight Directory Access Protocol, is an Internet protocol that use to look up information from a server, Directory.
Sample source Code Accessing LDAP server for authentication:
package com.qwest.iatt.ldap;
/******************************************************* **********************
Module : LDAPAccess.java
Purpose : Using LDAP service to authenticate
@author S. DESMIN JOSUVA CHRISTIAN
******************************************************************************/
import java.util.Hashtable;
import java.security.Security;
import javax.naming.AuthenticationException;
import javax.naming.*;
import javax.naming.Context;
import javax.naming.directory.*;
import javax.naming.InitialContext;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
/**
* This class use LDAP server to authenticat user and retrieve
* user attributes
*/
public class LDAPAccess
{
/**
* LDAP server configuration hashtable
*/
private static Hashtable LDAPAttrs = new Hashtable();
private static InitialDirContext default_ctx = null;
private static Hashtable propInfo=new Hashtable();
static
{
LDAPAttrs.put(Context.INITIAL_CONTEXT_FACTORY,"com.sun.jndi.ldap.LdapCtxFactory ");
LDAPAttrs.put(Context.AUTHORITATIVE,"true");
LDAPAttrs.put(Context.REFERRAL,"throw");
if (LDAPConstant.SSL_ON)
{
LDAPAttrs.put(Context.SECURITY_AUTHENTICATION, "simple");
LDAPAttrs.put(Context.SECURITY_PROTOCOL, "ssl");
LDAPAttrs.put(Context.PROVIDER_URL, LDAPConstant.SSL_URL);
}
else
{
LDAPAttrs.put(Context.PROVIDER_URL, LDAPConstant.NONESSL_URL);
}
try
{
default_ctx = new InitialDirContext(LDAPAttrs);
}
catch (Exception e) { }
}
/**
* authenticate user using LDAP
* @parm userName
* @parm userPswd
* @return true if authenicated by LDAP server, false otherwise
*/
public static boolean authenticateUser(String userName, String userPswd) throws Exception
{
boolean isAuthenticated = false;
if (userName == null || userName.equals(""))
{
throw new Exception("User ID can not be null!");
}
else if ( userPswd == null || userPswd.equals(""))
{
throw new Exception("User password can not be null!");
}
try
{
LDAPAttrs.put(Context.SECURITY_PRINCIPAL, "uid="+userName+", ou=People, o=uswest.com");
LDAPAttrs.put(Context.SECURITY_CREDENTIALS, userPswd);
InitialContext ctx = new InitialContext(LDAPAttrs);
ctx.close();
isAuthenticated = true;
System.out.println("Authentication to LDAP successful!");
}
catch (AuthenticationException e)
{
System.out.println("Authentication to LDAP failed: " + e);
}
catch (Exception e)
{
System.out.println("Exception happened during authentication to LDAP: " + e);
throw new Exception(e.toString());
}
return isAuthenticated;
} // method authenticateUser
/**
* Get user profile using LDAP
* @parm userName
* @return LDAPUserData if usernm is valid, otherwise null
*/
public static LDAPUserData getUserData(String userName) throws Exception
{
LDAPUserData userobj = null;
if ( userName == null || userName.equals(""))
{
throw new Exception("User ID can not be null");
}
try
{
if ( default_ctx == null)
{
default_ctx = new InitialDirContext(LDAPAttrs);
}
Attributes attrs = default_ctx.getAttributes("uid=" + userName + ", ou=People, o=uswest.com");
userobj = new LDAPUserData();
if (attrs.get("givenname") != null)
userobj.setFirstNm(attrs.get("givenname").get().toString());
if (attrs.get("sn") != null)
userobj.setLastNm(attrs.get("sn").get().toString());
if (attrs.get("mobile") != null)
userobj.setPhoneCellNo(attrs.get("mobile").get().toString());
if (attrs.get("pager") != null)
userobj.setPhonePagerNo(attrs.get("pager").get().toString());
if (attrs.get("telephonenumber") != null)
userobj.setPhoneVoiceNo(attrs.get("telephonenumber").get().toString());
if (attrs.get("mail") != null)
userobj.setEmailAddressTxt(attrs.get("mail").get().toString());
userobj.setUserNm(userName);
}catch (NamingException ne)
{
System.out.println("Exception happened while getting user attributes from Qwest LDAP: " + ne);
throw new Exception(ne.toString());
}
return userobj;
} // method getUserData
/**
* Print user attributes from LDAP
* @parm userName
* @return void
*/
public static Hashtable getUserAttrs(String userName) throws Exception
{
if ( userName == null || userName.equals(""))
{
throw new Exception("User ID can not be null");
}
try
{
if ( default_ctx == null)
{
default_ctx = new InitialDirContext(LDAPAttrs);
}
Attributes attrs = default_ctx.getAttributes("uid=" + userName + ", ou=People, o=uswest.com");
NamingEnumeration ae = attrs.getAll();
while(ae.hasMore())
{
Attribute attr=(Attribute)ae.next();
NamingEnumeration e=attr.getAll();
while(e.hasMore())
{
propInfo.put(attr.getID(),e.next());
}
}
}catch (NamingException ne)
{
throw new Exception(ne.toString());
}
return propInfo;
} // method getUserAttrs
/**
* test client
*/
/*
public static void main (String args[]) throws Exception{
String userName = "MyName";
String password = "MyPassword";
boolean result = authenticateUser(userName,password);
Hashtable p=getUserAttrs(userName);
Object s=p.get("employeetype")+"\n";
Object s1=p.get("title");
System.out.println(s);
System.out.println(s1);
} // method main */
}
|
|
Previous Topic
