U2F_MAX_REPORT_SIZE
if (sc->sc_isize > U2F_MAX_REPORT_SIZE) {
sc->sc_isize = U2F_MAX_REPORT_SIZE;
if (sc->sc_osize > U2F_MAX_REPORT_SIZE) {
sc->sc_osize = U2F_MAX_REPORT_SIZE;
uint8_t buf[U2F_MAX_REPORT_SIZE];
uint8_t buf[U2F_MAX_REPORT_SIZE];
uint8_t sc_buf[U2F_MAX_REPORT_SIZE];