--- loncom/lti/ltiutils.pm	2018/01/04 12:09:42	1.4
+++ loncom/lti/ltiutils.pm	2018/01/04 12:19:25	1.5
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Utility functions for managing LON-CAPA LTI interactions 
 #
-# $Id: ltiutils.pm,v 1.4 2018/01/04 12:09:42 raeburn Exp $
+# $Id: ltiutils.pm,v 1.5 2018/01/04 12:19:25 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -286,7 +286,7 @@ sub verify_lis_item {
             my $expected_sig;
             if ($context eq 'grade') {
                 my $uniqid = $digsymb.':::'.$diguser.':::'.$cdom.'_'.$cnum;
-                $expected_sig = &get_service_id($secret,$uniqid);
+                $expected_sig = (split(/:::/,&get_service_id($secret,$uniqid)))[0]; 
                 if ($expected_sig eq $sigrec) {
                     return 1;
                 } else {
@@ -294,7 +294,7 @@ sub verify_lis_item {
                 }
             } elsif ($context eq 'roster') {
                 my $uniqid = $digsymb.':::'.$cdom.'_'.$cnum;
-                $expected_sig = &get_service_id($secret,$uniqid);
+                $expected_sig = (split(/:::/,&get_service_id($secret,$uniqid)))[0]; 
                 if ($expected_sig eq $sigrec) {
                     return 1;
                 } else {