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# vi: ts=4 expandtab
#
# Copyright (C) 2009-2010 Canonical Ltd.
# Copyright (C) 2012 Hewlett-Packard Development Company, L.P.
#
# Author: Scott Moser <scott.moser@canonical.com>
# Author: Juerg Haefliger <juerg.haefliger@hp.com>
#
# 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 <http://www.gnu.org/licenses/>.
import sys
from cloudinit import util
from string import letters, digits # pylint: disable=W0402
# We are removing certain 'painful' letters/numbers
PW_SET = (letters.translate(None, 'loLOI') +
digits.translate(None, '01'))
def handle(_name, cfg, cloud, log, args):
if len(args) != 0:
# if run from command line, and give args, wipe the chpasswd['list']
password = args[0]
if 'chpasswd' in cfg and 'list' in cfg['chpasswd']:
del cfg['chpasswd']['list']
else:
password = util.get_cfg_option_str(cfg, "password", None)
expire = True
pw_auth = "no"
change_pwauth = False
plist = None
if 'chpasswd' in cfg:
chfg = cfg['chpasswd']
plist = util.get_cfg_option_str(chfg, 'list', plist)
expire = util.get_cfg_option_bool(chfg, 'expire', expire)
if not plist and password:
user = util.get_cfg_option_str(cfg, "user", "ubuntu")
plist = "%s:%s" % (user, password)
errors = []
if plist:
plist_in = []
randlist = []
users = []
for line in plist.splitlines():
u, p = line.split(':', 1)
if p == "R" or p == "RANDOM":
p = rand_user_password()
randlist.append("%s:%s" % (u, p))
plist_in.append("%s:%s" % (u, p))
users.append(u)
ch_in = '\n'.join(plist_in)
try:
log.debug("Changing password for %s:", users)
util.subp(['chpasswd'], ch_in)
except Exception as e:
errors.append(e)
util.logexc(log,
"Failed to set passwords with chpasswd for %s", users)
if len(randlist):
blurb = ("Set the following 'random' passwords\n",
'\n'.join(randlist))
sys.stderr.write("%s\n%s\n" % blurb)
if expire:
expired_users = []
for u in users:
try:
util.subp(['passwd', '--expire', u])
expired_users.append(u)
except Exception as e:
errors.append(e)
util.logexc(log, "Failed to set 'expire' for %s", u)
if expired_users:
log.debug("Expired passwords for: %s users", expired_users)
change_pwauth = False
pw_auth = None
if 'ssh_pwauth' in cfg:
change_pwauth = True
if util.is_true_str(cfg['ssh_pwauth']):
pw_auth = 'yes'
if util.is_false_str(cfg['ssh_pwauth']):
pw_auth = 'no'
if change_pwauth:
new_lines = []
replaced_auth = False
replacement = "PasswordAuthentication %s" % (pw_auth)
# See http://linux.die.net/man/5/sshd_config
old_lines = util.load_file('/etc/ssh/sshd_config').splitlines()
for i, line in enumerate(old_lines):
if not line.strip() or line.startswith("#"):
new_lines.append(line)
continue
splitup = line.split(None, 1)
if len(splitup) <= 1:
new_lines.append(line)
continue
(cmd, args) = splitup
# Keywords are case-insensitive and arguments are case-sensitive
cmd = cmd.lower().strip()
if cmd == 'passwordauthentication':
log.debug("Replacing auth line %s with %s", i + 1, replacement)
replaced_auth = True
new_lines.append(replacement)
else:
new_lines.append(line)
if not replaced_auth:
log.debug("Adding new auth line %s", replacement)
replaced_auth = True
new_lines.append(replacement)
util.write_file(cloud.paths.join(False, '/etc/ssh/sshd_config'),
"\n".join(new_lines))
try:
cmd = ['service']
cmd.append(cloud.distro.get_option('ssh_svcname', 'ssh'))
cmd.append('restart')
util.subp(cmd)
log.debug("Restarted the ssh daemon")
except:
util.logexc(log, "Restarting of the ssh daemon failed")
if len(errors):
log.debug("%s errors occured, re-raising the last one", len(errors))
raise errors[-1]
def rand_user_password(pwlen=9):
return util.rand_str(pwlen, select_from=PW_SET)
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