(* virt-sysprep
 * Copyright (C) 2012 Red Hat Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *)

open Sysprep_operation

module G = Guestfs

let ssh_hostkeys_perform g root =
  let typ = g#inspect_get_type root in
  if typ <> "windows" then (
    let files = g#glob_expand "/etc/ssh/*_host_*" in
    Array.iter g#rm files;
    []
  )
  else []

let ssh_hostkeys_op = {
  name = "ssh-hostkeys";
  pod_description = "\
Remove the SSH host keys in the guest.

The SSH host keys are regenerated (differently) next time the guest is
booted.

If, after cloning, the guest gets the same IP address, ssh will give
you a stark warning about the host key changing:

 @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
 @    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
 @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
 IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!";
  extra_args = [];
  perform = ssh_hostkeys_perform;
}

let () = register_operation ssh_hostkeys_op