--- loncom/homework/lonhomework.pm	2018/05/15 04:59:14	1.371
+++ loncom/homework/lonhomework.pm	2018/09/18 14:30:19	1.373
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # The LON-CAPA Homework handler
 #
-# $Id: lonhomework.pm,v 1.371 2018/05/15 04:59:14 raeburn Exp $
+# $Id: lonhomework.pm,v 1.373 2018/09/18 14:30:19 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -256,7 +256,7 @@ sub check_slot_access {
         } else {
             return ($status,$datemsg);
         }
-    } 
+    }
 
     if ($status eq 'CLOSED' ||
 	$status eq 'INVALID_ACCESS' ||
@@ -266,7 +266,7 @@ sub check_slot_access {
     if ($env{'request.state'} eq "construct") {
 	return ($status,$datemsg);
     }
-    
+
     if ($type eq 'Task') {
 	if ($checkedin &&
 	    $Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass') {
@@ -1879,6 +1879,8 @@ sub do_ltipassback {
                     my ($cdom,$cnum) = ($1,$2);
                     my $ckey = $item->{'lti'}->{'key'};
                     my $secret = $item->{'lti'}->{'secret'};
+                    my $msgformat = $item->{'lti'}->{'passbackformat'};
+                    my $sigmethod = 'HMAC-SHA1';
                     my $id = $item->{'pbid'};
                     my $url = $item->{'pburl'};
                     my $scope = $item->{'scope'};
@@ -1897,7 +1899,8 @@ sub do_ltipassback {
                         ($total,$possible) = &get_lti_score($uname,$udom);
                     }
                     if (($ckey ne '') && ($secret ne '') && ($id ne '') && ($url ne '') && ($possible)) {
-                        &LONCAPA::ltiutils::send_grade($id,$url,$ckey,$secret,$scoretype,$total,$possible);
+                        &LONCAPA::ltiutils::send_grade($id,$url,$ckey,$secret,$scoretype,$sigmethod,
+                                                       $msgformat,$total,$possible);
                     }
                 }
             }