Controller Autenticação Zend Auth Ldap

class AutenticacaoController extends Zend_Controller_Action {
    public function init() {
    }

    public function indexAction() {
        $form = new Application_Form_Login();

        if ($this->getRequest()->isPost()) {
            $data = $this->getRequest()->getPost();
            if ($form->isValid($data)) {
                $mm_login = $form->getValue('mm_login');
                $sha512_senha = hash('sha512', $form->getValue('sha512_senha'));
                $auth = Zend_Auth::getInstance();
                $config = new Zend_Config_Ini(APPLICATION_PATH . '/configs/application.ini', 'production');
                $options = $config->ldap->toArray();
                $authAdapter = new Zend_Auth_Adapter_Ldap($options, $mm_login, $sha512_senha);
                $result = $auth->authenticate($authAdapter);
                if ($result->isValid()) {
                    $usuario = $authAdapter->getResultRowObject();
                    $auth->getStorage()->write($usuario);
                    $session = new Zend_Session_Namespace();
                    $this->_redirect($session->uri);
                } else {
                    $form->getElement('error')->setLabel('Login / Senha Incorretos');
                    $this->view->formulario = $form->populate($data);
                }
            }
        }
        $this->view->formulario = $form;
    }

    public function loginAction() {
        $options = array(
            'host' => 'dc1.dominio.com',
            'port' => '389',
            'useStartTls' => true,
            'username' => 'cleston@dominio.com',
            'password' => 'santos',
            'accountDomainName' => 'dominio.com',
            'accountDomainNameShort' => 'DOMINIO',
            'accountCanonicalForm' => 4,
            'baseDn' => 'DC=dominio,DC=com',
            'bindRequiresDn' => false
        );
        $ldap = new Zend_Ldap($options);
        $acctname = $ldap->getCanonicalAccountName('robson', Zend_Ldap::ACCTNAME_FORM_DN);
        echo "$acctname\n";
    }

    /*
     * ACCTNAME_FORM_DN     1   CN=Alice Baker,CN=Users,DC=example,DC=com
     * ACCTNAME_FORM_USERNAME   2   abaker
     * ACCTNAME_FORM_BACKSLASH  3   EXAMPLE\abaker
     * ACCTNAME_FORM_PRINCIPAL  4   abaker@example.com
     */