t_fromb64
len = t_fromb64(tmp, sizeof(tmp), v);
len = t_fromb64(tmp, sizeof(tmp), s);
len = t_fromb64(tmp, sizeof(tmp), ch);
if ((len = t_fromb64(tmp, sizeof(tmp), N)) <= 0)
if ((len = t_fromb64(tmp, sizeof(tmp), g)) <= 0)
if ((len = t_fromb64(tmp2, sizeof(tmp2), *salt)) <= 0)