sshpkt_put_bignum2
(r = sshpkt_put_bignum2(ssh, pub_key)) != 0 ||
(r = sshpkt_put_bignum2(ssh, dh_p)) != 0 ||
(r = sshpkt_put_bignum2(ssh, dh_g)) != 0 ||
(r = sshpkt_put_bignum2(ssh, pub_key)) != 0 || /* f */
int sshpkt_put_bignum2(struct ssh *ssh, const BIGNUM *v);