/* Find <Hash> */
xmlpp::Node* hash = find_child (ms, "Hash");
ms->add_child_before (hash, "KeyId")->add_child_text ("urn:uuid:" + key_id().get ());
/* Find <Hash> */
xmlpp::Node* hash = find_child (ms, "Hash");
ms->add_child_before (hash, "KeyId")->add_child_text ("urn:uuid:" + key_id().get ());