ldap

這幾天做基於ibm portal 6的登錄改造， 驗證是基於ldap的。

由於沒有登錄portlet的源代碼，於是就自己去做這個ldap的用戶認證。一開始向到根據用戶名和密碼去查找ldap，根據找不着得到用戶來決定驗證是否成功， 但這個密碼無論怎樣都驗證不成功。。。只好放棄該方法

難道就沒有辦法驗證ldap用戶了？？網上搜索， 還是得到了方法， 其實很簡單，就是利用這個用戶名和密碼連接一次ldap，連得上就成功，否則失敗。

參考代碼貼出來了，如下：

package com.test.ldap;

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.SearchControls;
import javax.naming.directory.SearchResult;
import javax.naming.ldap.Control;
import javax.naming.ldap.InitialLdapContext;
import javax.naming.ldap.LdapContext;



public class UserAuthenticate {
    private String URL = "ldap://localhost:389/";
    private String BASEDN = "ou=catalogue,o=test.com";
    private String FACTORY = "com.sun.jndi.ldap.LdapCtxFactory";
    private LdapContext ctx = null;
    private Hashtable env = null;
    private Control[] connCtls = null;


    private void LDAP_connect(){
        env = new Hashtable();
        env.put(Context.INITIAL_CONTEXT_FACTORY,FACTORY);
        env.put(Context.PROVIDER_URL, URL+BASEDN);//LDAP server
        env.put(Context.SECURITY_AUTHENTICATION, "simple");
//此處若不指定用戶名和密碼,則自動轉換爲匿名登錄

        try{
            ctx = new InitialLdapContext(env,connCtls);
        }catch(javax.naming.AuthenticationException e){
            System.out.println("Authentication faild: "+e.toString());
        }catch(Exception e){
            System.out.println("Something wrong while authenticating: "+e.toString());
        }
    }


    private String getUserDN(String email){
        String userDN = "";

        LDAP_connect();

        try{
               SearchControls constraints = new SearchControls();
               constraints.setSearchScope(SearchControls.SUBTREE_SCOPE);
               NamingEnumeration en = ctx.search("", "mail="+email, constraints); //The UID you are going to query,* means all nodes
               if(en == null){
                System.out.println("Have no NamingEnumeration.");
               }
               if(!en.hasMoreElements()){
                System.out.println("Have no element.");
               }
               while (en != null && en.hasMoreElements()){//maybe more than one element
                   Object obj = en.nextElement();
                   if(obj instanceof SearchResult){
                       SearchResult si = (SearchResult) obj;
                       userDN += si.getName();
                       userDN += "," + BASEDN;
                   }
                   else{
                       System.out.println(obj);
                   }
                   System.out.println();
               }
              }catch(Exception e){
               System.out.println("Exception in search():"+e);
              }

        return userDN;
    }


    public boolean authenricate(String ID,String password){
        boolean valide = false;
        String userDN = getUserDN(ID);

        try {
            ctx.addToEnvironment(Context.SECURITY_PRINCIPAL,userDN);
            ctx.addToEnvironment(Context.SECURITY_CREDENTIALS,password);
            ctx.reconnect(connCtls);
            System.out.println(userDN + " is authenticated");
            valide = true;
        }catch (AuthenticationException e) {
            System.out.println(userDN + " is not authenticated");
            System.out.println(e.toString());
            valide = false;
        }catch (NamingException e) {
            System.out.println(userDN + " is not authenticated");
            valide = false;
        }

        return valide;
    }
}

 

原來，一切這麼簡單。