write_lebn
write_lebn(out, e, 4);
write_lebn(out, n, nbyte);
write_lebn(out, p, hnbyte);
write_lebn(out, q, hnbyte);
write_lebn(out, dmp1, hnbyte);
write_lebn(out, dmq1, hnbyte);
write_lebn(out, iqmp, hnbyte);
write_lebn(out, d, nbyte);
write_lebn(out, p, nbyte);
write_lebn(out, q, 20);
write_lebn(out, g, nbyte);
write_lebn(out, pub_key, nbyte);
write_lebn(out, priv_key, 20);