Initial support for UNL's CAS Authentication

library/Nmc/Auth/Adapter/Cas.php

@@ -16,5 +16,6 @@ class Nmc_Auth_Adapter_Cas implements Zend_Auth_Adapter_Interface
         if ($loggedIn) {
             return new Zend_Auth_Result(true, phpCAS::getUser());
         }
+        return new Zend_Auth_Result(false, null, array('Not signed in to CAS.'));
     }
 }
\ No newline at end of file

library/Nmc/Auth/Adapter/Ldap.php

@@ -27,10 +27,13 @@ class Nmc_Auth_Adapter_Ldap implements Zend_Auth_Adapter_Interface
         $userName = $this->_userName;
         $password = $this->_password;
 
+        if (!$userName) {
+            return new Zend_Auth_Result(false, null, array('LDAP: No username specified.'));
+        }
+
         try {
             $this->_connection->bind("uid=$userName,ou=people,dc=unl,dc=edu", $password);
-
-    		$filter = 'uid=' . $user_name;
+            $filter = 'uid=' . $userName;
             $this->_connection->search('ou=people,dc=unl,dc=edu', $filter );
         } catch (Nmc_Ldap_Exception $e) {
             if ($e->getCode() == 49) {