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# Authors:
# Pavel Zuna <pzuna@redhat.com>
#
# Copyright (C) 2010 Red Hat
# see file 'COPYING' for use and warranty information
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
"""
Kerberos ticket policy
There is a single Kerberos ticket policy. This policy defines the
maximum ticket lifetime and the maximum renewal age, the period during
which the ticket is renewable.
You can also create a per-user ticket policy by specifying the user login.
For changes to the global policy to take effect, restarting the KDC service
is required, which can be achieved using:
service krb5kdc restart
Changes to per-user policies take effect immediately for newly requested
tickets (e.g. when the user next runs kinit).
EXAMPLES:
Display the current Kerberos ticket policy:
ipa krbtpolicy-show
Reset the policy to the default:
ipa krbtpolicy-reset
Modify the policy to 8 hours max life, 1-day max renewal:
ipa krbtpolicy-mod --maxlife=28800 --maxrenew=86400
Display effective Kerberos ticket policy for user 'admin':
ipa krbtpolicy-show admin
Reset per-user policy for user 'admin':
ipa krbtpolicy-reset admin
Modify per-user policy for user 'admin':
ipa krbtpolicy-mod admin --maxlife=3600
"""
from ipalib import api
from ipalib import Int, Str
from ipalib.plugins.baseldap import *
from ipalib import _
# FIXME: load this from a config file?
_default_values = {
'krbmaxticketlife': 86400,
'krbmaxrenewableage': 604800,
}
class krbtpolicy(LDAPObject):
"""
Kerberos Ticket Policy object
"""
container_dn = 'cn=%s,cn=kerberos' % api.env.realm
object_name = 'kerberos ticket policy settings'
default_attributes = ['krbmaxticketlife', 'krbmaxrenewableage']
limit_object_classes = ['krbticketpolicyaux']
label=_('Kerberos Ticket Policy')
takes_params = (
Str('uid?',
cli_name='user',
label=_('User name'),
doc=_('Manage ticket policy for specific user'),
primary_key=True,
),
Int('krbmaxticketlife?',
cli_name='maxlife',
label=_('Max life'),
doc=_('Maximum ticket life (seconds)'),
minvalue=1,
),
Int('krbmaxrenewableage?',
cli_name='maxrenew',
label=_('Max renew'),
doc=_('Maximum renewable age (seconds)'),
minvalue=1,
),
)
def get_dn(self, *keys, **kwargs):
if keys[-1] is not None:
return self.api.Object.user.get_dn(*keys, **kwargs)
return self.container_dn
api.register(krbtpolicy)
class krbtpolicy_mod(LDAPUpdate):
"""
Modify Kerberos ticket policy.
"""
def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
# disable all flag
# ticket policies are attached to objects with unrelated attributes
if options.get('all'):
options['all'] = False
return dn
api.register(krbtpolicy_mod)
class krbtpolicy_show(LDAPRetrieve):
"""
Display the current Kerberos ticket policy.
"""
def pre_callback(self, ldap, dn, attrs_list, *keys, **options):
# disable all flag
# ticket policies are attached to objects with unrelated attributes
if options.get('all'):
options['all'] = False
return dn
def post_callback(self, ldap, dn, entry_attrs, *keys, **options):
if keys[-1] is not None:
# if policy for a specific user isn't set, display global values
if 'krbmaxticketlife' not in entry_attrs or \
'krbmaxrenewableage' not in entry_attrs:
res = self.api.Command.krbtpolicy_show()
for a in self.obj.default_attributes:
entry_attrs.setdefault(a, res['result'][a])
return dn
api.register(krbtpolicy_show)
class krbtpolicy_reset(LDAPQuery):
"""
Reset Kerberos ticket policy to the default values.
"""
has_output = output.standard_entry
def execute(self, *keys, **options):
ldap = self.obj.backend
dn = self.obj.get_dn(*keys, **options)
def_values = {}
# if reseting policy for a user - just his values
if keys[-1] is not None:
for a in self.obj.default_attributes:
def_values[a] = None
# if reseting global policy - set values to default
else:
def_values = _default_values
try:
ldap.update_entry(dn, def_values)
except errors.EmptyModlist:
pass
if keys[-1] is not None:
# policy for user was deleted, retrieve global policy
dn = self.obj.get_dn(None)
(dn, entry_attrs) = ldap.get_entry(dn, self.obj.default_attributes)
if keys[-1] is not None:
return dict(result=entry_attrs, value=keys[-1])
return dict(result=entry_attrs, value=u'')
api.register(krbtpolicy_reset)
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