if (do_mac != NO) {
if (mackey_opt == TFC_MACKEY_RAWKEY) skein(mackey, TF_MAX_BITS, key, key, TF_FROM_BITS(TFC_KEY_BITS));
if (ctr_mode < TFC_MODE_OCB) {
if (do_mac != NO) {
if (mackey_opt == TFC_MACKEY_RAWKEY) skein(mackey, TF_MAX_BITS, key, key, TF_FROM_BITS(TFC_KEY_BITS));
if (ctr_mode < TFC_MODE_OCB) {