ssh_set_newkeys
if ((r = ssh_set_newkeys(ssh, MODE_IN)) != 0)
r = ssh_set_newkeys(ssh, MODE_OUT);
if ((r = ssh_set_newkeys(ssh, MODE_IN)) != 0 ||
(r = ssh_set_newkeys(ssh, MODE_OUT)) != 0)
int ssh_set_newkeys(struct ssh *, int mode);