Fix existing sets not being included in seal

Author: abeverley

libopenarc/arc-canon.c

@@ -2103,6 +2103,28 @@ arc_canon_add_to_seal(ARC_MESSAGE *msg)
 
 	sc = msg->arc_sealcanon;
 
+        /* This ARC Seal must include any existing ARC sets. Add those first */
+        for (u_int i = 0; i < msg->arc_nsets; i++)
+        {
+            hdr = msg->arc_sets[i].arcset_aar;
+
+            status = arc_canon_header(msg, msg->arc_sealcanon, hdr, TRUE);
+            if (status != ARC_STAT_OK)
+                    return status;
+
+            hdr = msg->arc_sets[i].arcset_ams;
+
+            status = arc_canon_header(msg, msg->arc_sealcanon, hdr, TRUE);
+            if (status != ARC_STAT_OK)
+                    return status;
+
+            hdr = msg->arc_sets[i].arcset_as;
+
+            status = arc_canon_header(msg, msg->arc_sealcanon, hdr, TRUE);
+            if (status != ARC_STAT_OK)
+                    return status;
+
+        }
 	for (hdr = msg->arc_sealhead; hdr != NULL; hdr = hdr->hdr_next)
 	{
 		status = arc_canon_header(msg, msg->arc_sealcanon, hdr, TRUE);