# vi: ts=4 expandtab # # Copyright (C) 2009-2010 Canonical Ltd. # Copyright (C) 2012 Hewlett-Packard Development Company, L.P. # # Author: Scott Moser # Author: Juerg Haefliger # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License version 3, as # published by the Free Software Foundation. # # 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, see . import os import glob from cloudinit import util from cloudinit import ssh_util DISABLE_ROOT_OPTS = ( "no-port-forwarding,no-agent-forwarding," "no-X11-forwarding,command=\"echo \'Please login as the user \\\"$USER\\\" " "rather than the user \\\"root\\\".\';echo;sleep 10\"") key2file = { "rsa_private": ("/etc/ssh/ssh_host_rsa_key", 0600), "rsa_public": ("/etc/ssh/ssh_host_rsa_key.pub", 0644), "dsa_private": ("/etc/ssh/ssh_host_dsa_key", 0600), "dsa_public": ("/etc/ssh/ssh_host_dsa_key.pub", 0644), "ecdsa_private": ("/etc/ssh/ssh_host_ecdsa_key", 0600), "ecdsa_public": ("/etc/ssh/ssh_host_ecdsa_key.pub", 0644), } priv2pub = { 'rsa_private': 'rsa_public', 'dsa_private': 'dsa_public', 'ecdsa_private': 'ecdsa_public', } key_gen_tpl = 'o=$(ssh-keygen -yf "%s") && echo "$o" root@localhost > "%s"' generate_keys = ['rsa', 'dsa', 'ecdsa'] def handle(_name, cfg, cloud, log, _args): # remove the static keys from the pristine image if cfg.get("ssh_deletekeys", True): for f in glob.glob("/etc/ssh/ssh_host_*key*"): try: util.del_file(f) except: util.logexc(log, "Failed deleting key file %s", f) if "ssh_keys" in cfg: # if there are keys in cloud-config, use them for (key, val) in cfg["ssh_keys"].iteritems(): if key in key2file: tgt_fn = key2file[key][0] tgt_perms = key2file[key][1] util.write_file(cloud.paths.join(False, tgt_fn), val, tgt_perms) for (priv, pub) in priv2pub.iteritems(): if pub in cfg['ssh_keys'] or not priv in cfg['ssh_keys']: continue pair = (key2file[priv][0], key2file[pub][0]) cmd = ['sh', '-xc', key_gen_tpl % pair] try: # TODO: Is this guard needed? with util.SeLinuxGuard("/etc/ssh", recursive=True): util.subp(cmd, capture=False) log.debug("Generated a key for %s from %s", pair[0], pair[1]) except: util.logexc(log, ("Failed generated a key" " for %s from %s"), pair[0], pair[1]) else: # if not, generate them genkeys = util.get_cfg_option_list(cfg, 'ssh_genkeytypes', generate_keys) for keytype in genkeys: keyfile = '/etc/ssh/ssh_host_%s_key' % (keytype) keyfile = cloud.paths.join(False, keyfile) if not os.path.exists(keyfile): cmd = ['ssh-keygen', '-t', keytype, '-N', '', '-f', keyfile] try: # TODO: Is this guard needed? with util.SeLinuxGuard("/etc/ssh", recursive=True): util.subp(cmd, capture=False) except: util.logexc(log, ("Failed generating key type" " %s to file %s"), keytype, keyfile) try: user = util.get_cfg_option_str(cfg, 'user') disable_root = util.get_cfg_option_bool(cfg, "disable_root", True) disable_root_opts = util.get_cfg_option_str(cfg, "disable_root_opts", DISABLE_ROOT_OPTS) keys = cloud.get_public_ssh_keys() or [] if "ssh_authorized_keys" in cfg: cfgkeys = cfg["ssh_authorized_keys"] keys.extend(cfgkeys) apply_credentials(keys, user, cloud.paths, disable_root, disable_root_opts) except: util.logexc(log, "Applying ssh credentials failed!") def apply_credentials(keys, user, paths, disable_root, disable_root_opts): keys = set(keys) if user: ssh_util.setup_user_keys(keys, user, '', paths) if disable_root and user: key_prefix = disable_root_opts.replace('$USER', user) else: key_prefix = '' ssh_util.setup_user_keys(keys, 'root', key_prefix, paths)