10.2.5 Binding Anonymously to LDAP Server and Searching for a User Distinguished Name

The following code shows how to bind anonymously to the LDAP server and searches for User Distinguished Name (DN) entered by a user. This function is executed in Step 3 of Figure .

public static String BindAnonymous(String LDAPHost,

    String UsrID, String BaseDN) throws NamingException

{

    try

    {

        String vLDAPHost = LDAPHost;

        String vUsrID = UsrID;

        String vBaseDN = BaseDN;

        Hashtable anonymousEnv = new Hashtable();

        /* Setting the environment for anonymous authentication */

        anonymousEnv.put(Context.INITIAL_CONTEXT_FACTORY,

            "com.sun.jndi.ldap.LdapCtxFactory");

        anonymousEnv.put(Context.PROVIDER_URL, vLDAPHost);

        anonymousEnv.put(Context.SECURITY_AUTHENTICATION, "none");

        /* Creating the directory context with anonymous environment

            set above */

        DirContext anonymousCtx = new

        InitialDirContext(anonymousEnv);

        /* Set the filter as the User DN provided by a user*/

        String filter = "(&("+vUsrID+") )";

        SearchControls ctls = new SearchControls();

        /* Set the search scope for main as well as subtree nodes*/

        ctls.setSearchScope(SearchControls.SUBTREE_SCOPE);

        /* Connecting to the directory anonymously and searching

            for the User DN */

        NamingEnumeration result = anonymousCtx.search(vBaseDN,

            filter, ctls);

        while (result.hasMore())

        {

            SearchResult sr = (SearchResult)result.next();

            vUsrDN = sr.getName()+","+vBaseDN;

        }

    }

    catch (Exception e)

    {

        System.out.println("Error from BindAnonymous - "+

            e.getMessage());

    }

    /* returning User DN with Base DN */

    return vUsrDN;

}