sshpkt_putb
(r = sshpkt_putb(ssh, modified)) != 0 ||
(r = sshpkt_putb(ssh, m)) != 0 ||
(r = sshpkt_putb(ssh, kex->my)) != 0 ||
int sshpkt_putb(struct ssh *ssh, const struct sshbuf *b);
(success && resp != NULL && (r = sshpkt_putb(ssh, resp)) != 0) ||
(r = sshpkt_putb(ssh, b)) != 0 ||