How do a LDAP search authenticate against this LDAP in Java

Question

I am playing with LDAP and Java search  Here s my LDIF export with a simple organization  version  1  dn  dc example dc com objectClass  organization objectClass  dcObject objectClass  top dc  example o  MyOrganization description  Test Description  dn  ou people  dc example dc com objectClass  organizationalUnit objectClass  top ou  people description  All users in demo company  dn  cn Johnny Doe ou people dc example dc com objectClass  organizationalPerson objectClass  person objectClass  inetOrgPerson objectClass  top cn  Johnny Doe sn  Johnny homephone  123-456-7890 mail  johnny johnny com ou  Development uid  jjohnny userpassword   johnny  dn  cn Samuel Johnson ou people dc example dc com objectClass  organizationalPerson objectClass  person objectClass  inetOrgPerson objectClass  top cn  Samuel Johnson sn  Samuel homephone  123-456-7890 mail  sam ssam com ou  Accounts uid  ssam userpassword   sammy   How do I run a Java snippet to get all users from the LDAP server  There s no authentication set-up on my Apache DS Directory Server   Hashtable env   new Hashtable 11   env put Context INITIAL CONTEXT FACTORY   com sun jndi ldap LdapCtxFactory    env put Context PROVIDER URL   ldap   localhost 10389 dc example dc com    env put Context SECURITY AUTHENTICATION   none     try          Create initial context     DirContext ctx   new InitialDirContext env       Object obj   new Object           want to print all users from the LDAP server     System out println obj toString         ctx close

User · Answer

You can also use the following code    package com agileinfotech bsviewer ldap   import java util Hashtable  import java util ResourceBundle   import javax naming Context  import javax naming NamingException  import javax naming directory DirContext  import javax naming directory InitialDirContext   public class LDAPLoginAuthentication       public LDAPLoginAuthentication                TODO Auto-generated constructor            ResourceBundle resBundle   ResourceBundle getBundle  settings          SuppressWarnings  unchecked       public String authenticateUser String username  String password            String strUrl    success           Hashtable env   new Hashtable 11           boolean b   false          String Securityprinciple    cn     username         resBundle getString  UserSearch            env put Context INITIAL CONTEXT FACTORY  resBundle getString  InitialContextFactory             env put Context PROVIDER URL  resBundle getString  Provider url             env put Context SECURITY AUTHENTICATION   simple            env put Context SECURITY PRINCIPAL  Securityprinciple           env put Context SECURITY CREDENTIALS  password            try                  Create initial context             DirContext ctx   new InitialDirContext env                  Close the context when we re done             b   true              ctx close               catch  NamingException e                b   false            finally               if  b                    strUrl    success                 else                   strUrl    failer                                   return strUrl

User · Answer

try       LdapContext ctx   new InitialLdapContext env  null       ctx setRequestControls null       NamingEnumeration lt   gt  namingEnum   ctx search  ou people dc example dc com     objectclass user    getSimpleSearchControls         while  namingEnum hasMore               SearchResult result    SearchResult  namingEnum next                 Attributes attrs   result getAttributes             System out println attrs get  cn                 namingEnum close      catch  Exception e        e printStackTrace       private SearchControls getSimpleSearchControls         SearchControls searchControls   new SearchControls        searchControls setSearchScope SearchControls SUBTREE SCOPE       searchControls setTimeLimit 30000         String   attrIDs     objectGUID          searchControls setReturningAttributes attrIDs       return searchControls

User · Answer

Another approach is using UnboundID  Its api is very readable and shorter  Create a Ldap Connection  public static LDAPConnection getConnection   throws LDAPException          host  port  username and password     return new LDAPConnection  com example local   389   Administrator com example local    admin        Get filter result  public static List lt SearchResultEntry gt  getResults LDAPConnection connection  String baseDN  String filter  throws LDAPSearchException       SearchResult searchResult       if  connection isConnected              searchResult   connection search baseDN  SearchScope ONE  filter            return searchResult getSearchEntries               return null      Get all Oragnization Units and Containers  String baseDN    DC com DC example DC local   String filter      amp    objectClass organizationalUnit  objectClass container       LDAPConnection connection   getConnection            List lt SearchResultEntry gt  results   getResults connection  baseDN  filter     Get a specific Organization Unit  String baseDN    DC com DC example DC local   String dn    CN Users DC com DC example DC local    String filterFormat      amp    objectClass organizationalUnit  objectClass container   distinguishedName  s     String filter   String format filterFormat  dn    LDAPConnection connection    getConnection     List lt SearchResultEntry gt  results   getResults connection  baseDN  filter     Get all users under an Organizational Unit  String baseDN    CN Users DC com DC example DC local   String filter      amp  objectClass user    objectCategory computer       LDAPConnection connection    getConnection           List lt SearchResultEntry gt  results   getResults connection  baseDN  filter     Get a specific user under an Organization Unit  String baseDN    CN Users DC com DC example DC local   String userDN    CN abc CN Users DC com DC example DC local    String filterFormat      amp  objectClass user  distinguishedName  s     String filter   String format filterFormat  userDN    LDAPConnection connection    getConnection    List lt SearchResultEntry gt  results   getResults connection  baseDN  filter     Display result  for  SearchResultEntry e   results        System out println  name      e getAttributeValue  name

[java] How do a LDAP search/authenticate against this LDAP in Java

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