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https://salsa.debian.org/freeipa-team/freeipa.git
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8d00d7c130
We actually perform two searches in permission-find. The first looks for matches within the permission object itself. The second looks at matches in the underlying aci. We need to break out in two places. The first is if we find enough matches in the permission itself. The second when we are appending matches from acis. The post_callback() definition needed to be modified to return the truncated value so a plugin author can modify that value. https://fedorahosted.org/freeipa/ticket/2322
504 lines
17 KiB
Python
504 lines
17 KiB
Python
# Authors:
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# Pavel Zuna <pzuna@redhat.com>
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# Martin Kosek <mkosek@redhat.com>
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#
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# Copyright (C) 2010 Red Hat
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# see file 'COPYING' for use and warranty information
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from ipalib import api
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from ipalib import Int, Str
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from ipalib.plugins.baseldap import *
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from ipalib import _
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from ipalib.request import context
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from ipapython.ipautil import run
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from distutils import version
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__doc__ = _("""
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Password policy
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A password policy sets limitations on IPA passwords, including maximum
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lifetime, minimum lifetime, the number of passwords to save in
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history, the number of character classes required (for stronger passwords)
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and the minimum password length.
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By default there is a single, global policy for all users. You can also
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create a password policy to apply to a group. Each user is only subject
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to one password policy, either the group policy or the global policy. A
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group policy stands alone; it is not a super-set of the global policy plus
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custom settings.
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Each group password policy requires a unique priority setting. If a user
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is in multiple groups that have password policies, this priority determines
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which password policy is applied. A lower value indicates a higher priority
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policy.
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Group password policies are automatically removed when the groups they
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are associated with are removed.
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EXAMPLES:
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Modify the global policy:
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ipa pwpolicy-mod --minlength=10
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Add a new group password policy:
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ipa pwpolicy-add --maxlife=90 --minlife=1 --history=10 --minclasses=3 --minlength=8 --priority=10 localadmins
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Display the global password policy:
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ipa pwpolicy-show
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Display a group password policy:
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ipa pwpolicy-show localadmins
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Display the policy that would be applied to a given user:
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ipa pwpolicy-show --user=tuser1
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Modify a group password policy:
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ipa pwpolicy-mod --minclasses=2 localadmins
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""")
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class cosentry(LDAPObject):
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"""
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Class of Service object used for linking policies with groups
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"""
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NO_CLI = True
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container_dn = 'cn=costemplates,%s' % api.env.container_accounts
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object_class = ['top', 'costemplate', 'extensibleobject', 'krbcontainer']
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default_attributes = ['cn', 'cospriority', 'krbpwdpolicyreference']
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takes_params = (
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Str('cn', primary_key=True),
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Str('krbpwdpolicyreference'),
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Int('cospriority', minvalue=0),
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)
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priority_not_unique_msg = _(
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'priority must be a unique value (%(prio)d already used by %(gname)s)'
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)
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def get_dn(self, *keys, **options):
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group_dn = self.api.Object.group.get_dn(keys[-1])
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return self.backend.make_dn_from_attr(
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'cn', group_dn, self.container_dn
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)
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def check_priority_uniqueness(self, *keys, **options):
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if options.get('cospriority') is not None:
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entries = self.methods.find(
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cospriority=options['cospriority']
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)['result']
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if len(entries) > 0:
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group_name = self.api.Object.group.get_primary_key_from_dn(
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entries[0]['cn'][0]
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)
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raise errors.ValidationError(
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name='priority',
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error=self.priority_not_unique_msg % {
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'prio': options['cospriority'],
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'gname': group_name,
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}
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)
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api.register(cosentry)
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class cosentry_add(LDAPCreate):
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NO_CLI = True
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def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
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# check for existence of the group
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result = self.api.Command.group_show(keys[-1], all=True)['result']
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oc = map(lambda x:x.lower(),result['objectclass'])
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if 'mepmanagedentry' in oc:
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raise errors.ManagedPolicyError()
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self.obj.check_priority_uniqueness(*keys, **options)
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del entry_attrs['cn']
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return dn
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api.register(cosentry_add)
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class cosentry_del(LDAPDelete):
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NO_CLI = True
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api.register(cosentry_del)
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class cosentry_mod(LDAPUpdate):
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NO_CLI = True
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def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
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new_cospriority = options.get('cospriority')
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if new_cospriority is not None:
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cos_entry = self.api.Command.cosentry_show(keys[-1])['result']
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old_cospriority = int(cos_entry['cospriority'][0])
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# check uniqueness only when the new priority differs
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if old_cospriority != new_cospriority:
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self.obj.check_priority_uniqueness(*keys, **options)
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return dn
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api.register(cosentry_mod)
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class cosentry_show(LDAPRetrieve):
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NO_CLI = True
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api.register(cosentry_show)
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class cosentry_find(LDAPSearch):
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NO_CLI = True
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api.register(cosentry_find)
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global_policy_name = 'global_policy'
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global_policy_dn = 'cn=%s,cn=%s,cn=kerberos,%s' % (global_policy_name, api.env.realm, api.env.basedn)
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class pwpolicy(LDAPObject):
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"""
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Password Policy object
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"""
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container_dn = 'cn=%s,cn=kerberos' % api.env.realm
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object_name = _('password policy')
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object_name_plural = _('password policies')
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object_class = ['top', 'nscontainer', 'krbpwdpolicy']
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default_attributes = [
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'cn', 'cospriority', 'krbmaxpwdlife', 'krbminpwdlife',
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'krbpwdhistorylength', 'krbpwdmindiffchars', 'krbpwdminlength',
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'krbpwdmaxfailure', 'krbpwdfailurecountinterval',
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'krbpwdlockoutduration',
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]
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MIN_KRB5KDC_WITH_LOCKOUT = "1.8"
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has_lockout = False
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lockout_params = ()
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(stdout, stderr, rc) = run(['klist', '-V'], raiseonerr=False)
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if rc == 0:
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verstr = stdout.split()[-1]
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ver = version.LooseVersion(verstr)
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min = version.LooseVersion(MIN_KRB5KDC_WITH_LOCKOUT)
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if ver >= min:
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has_lockout = True
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if has_lockout:
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lockout_params = (
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Int('krbpwdmaxfailure?',
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cli_name='maxfail',
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label=_('Max failures'),
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doc=_('Consecutive failures before lockout'),
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minvalue=0,
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),
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Int('krbpwdfailurecountinterval?',
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cli_name='failinterval',
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label=_('Failure reset interval'),
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doc=_('Period after which failure count will be reset (seconds)'),
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minvalue=0,
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),
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Int('krbpwdlockoutduration?',
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cli_name='lockouttime',
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label=_('Lockout duration'),
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doc=_('Period for which lockout is enforced (seconds)'),
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minvalue=0,
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),
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)
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label = _('Password Policies')
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label_singular = _('Password Policy')
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takes_params = (
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Str('cn?',
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cli_name='group',
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label=_('Group'),
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doc=_('Manage password policy for specific group'),
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primary_key=True,
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),
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Int('krbmaxpwdlife?',
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cli_name='maxlife',
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label=_('Max lifetime (days)'),
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doc=_('Maximum password lifetime (in days)'),
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minvalue=0,
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),
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Int('krbminpwdlife?',
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cli_name='minlife',
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label=_('Min lifetime (hours)'),
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doc=_('Minimum password lifetime (in hours)'),
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minvalue=0,
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),
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Int('krbpwdhistorylength?',
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cli_name='history',
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label=_('History size'),
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doc=_('Password history size'),
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minvalue=0,
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),
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Int('krbpwdmindiffchars?',
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cli_name='minclasses',
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label=_('Character classes'),
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doc=_('Minimum number of character classes'),
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minvalue=0,
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maxvalue=5,
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),
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Int('krbpwdminlength?',
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cli_name='minlength',
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label=_('Min length'),
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doc=_('Minimum length of password'),
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minvalue=0,
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),
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Int('cospriority',
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cli_name='priority',
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label=_('Priority'),
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doc=_('Priority of the policy (higher number means lower priority'),
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minvalue=0,
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flags=('virtual_attribute',),
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),
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) + lockout_params
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def get_dn(self, *keys, **options):
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if keys[-1] is not None:
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return self.backend.make_dn_from_attr(
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self.primary_key.name, keys[-1], self.container_dn
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)
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return global_policy_dn
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def convert_time_for_output(self, entry_attrs, **options):
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# Convert seconds to hours and days for displaying to user
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if not options.get('raw', False):
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if 'krbmaxpwdlife' in entry_attrs:
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entry_attrs['krbmaxpwdlife'][0] = unicode(
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int(entry_attrs['krbmaxpwdlife'][0]) / 86400
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)
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if 'krbminpwdlife' in entry_attrs:
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entry_attrs['krbminpwdlife'][0] = unicode(
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int(entry_attrs['krbminpwdlife'][0]) / 3600
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)
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def convert_time_on_input(self, entry_attrs):
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# Convert hours and days to seconds for writing to LDAP
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if 'krbmaxpwdlife' in entry_attrs and entry_attrs['krbmaxpwdlife']:
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entry_attrs['krbmaxpwdlife'] = entry_attrs['krbmaxpwdlife'] * 86400
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if 'krbminpwdlife' in entry_attrs and entry_attrs['krbminpwdlife']:
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entry_attrs['krbminpwdlife'] = entry_attrs['krbminpwdlife'] * 3600
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def validate_lifetime(self, entry_attrs, add=False, *keys):
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"""
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Ensure that the maximum lifetime is greater than the minimum.
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If there is no minimum lifetime set then don't return an error.
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"""
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maxlife=entry_attrs.get('krbmaxpwdlife', None)
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minlife=entry_attrs.get('krbminpwdlife', None)
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existing_entry = {}
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if not add: # then read existing entry
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existing_entry = self.api.Command.pwpolicy_show(keys[-1],
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all=True, raw=True,
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)['result']
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if minlife is None and 'krbminpwdlife' in existing_entry:
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minlife = int(existing_entry['krbminpwdlife'][0])
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if maxlife is None and 'krbmaxpwdlife' in existing_entry:
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maxlife = int(existing_entry['krbmaxpwdlife'][0])
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if maxlife is not None and minlife is not None:
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if minlife > maxlife:
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raise errors.ValidationError(
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name='maxlife',
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error=_('Maximum password life must be greater than minimum.'),
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)
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def add_cospriority(self, entry, pwpolicy_name, rights=True):
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if pwpolicy_name and pwpolicy_name != global_policy_name:
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cos_entry = self.api.Command.cosentry_show(
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pwpolicy_name,
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rights=rights, all=rights
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)['result']
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if cos_entry.get('cospriority') is not None:
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entry['cospriority'] = cos_entry['cospriority']
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if rights:
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entry['attributelevelrights']['cospriority'] = \
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cos_entry['attributelevelrights']['cospriority']
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api.register(pwpolicy)
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class pwpolicy_add(LDAPCreate):
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__doc__ = _('Add a new group password policy.')
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def get_args(self):
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yield self.obj.primary_key.clone(attribute=True, required=True)
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def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
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self.obj.convert_time_on_input(entry_attrs)
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self.obj.validate_lifetime(entry_attrs, True)
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self.api.Command.cosentry_add(
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keys[-1], krbpwdpolicyreference=dn,
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cospriority=options.get('cospriority')
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)
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return dn
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def post_callback(self, ldap, dn, entry_attrs, *keys, **options):
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self.log.info('%r' % entry_attrs)
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# attribute rights are not allowed for pwpolicy_add
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self.obj.add_cospriority(entry_attrs, keys[-1], rights=False)
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self.obj.convert_time_for_output(entry_attrs, **options)
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return dn
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api.register(pwpolicy_add)
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class pwpolicy_del(LDAPDelete):
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__doc__ = _('Delete a group password policy.')
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def get_args(self):
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yield self.obj.primary_key.clone(
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attribute=True, required=True, multivalue=True
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)
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def pre_callback(self, ldap, dn, *keys, **options):
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if dn.lower() == global_policy_dn.lower():
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raise errors.ValidationError(
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name='group',
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error=_('cannot delete global password policy')
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)
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return dn
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def post_callback(self, ldap, dn, *keys, **options):
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try:
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self.api.Command.cosentry_del(keys[-1])
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except errors.NotFound:
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pass
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return True
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api.register(pwpolicy_del)
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class pwpolicy_mod(LDAPUpdate):
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__doc__ = _('Modify a group password policy.')
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def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
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self.obj.convert_time_on_input(entry_attrs)
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self.obj.validate_lifetime(entry_attrs, False, *keys)
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setattr(context, 'cosupdate', False)
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if options.get('cospriority') is not None:
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if keys[-1] is None:
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raise errors.ValidationError(
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name='priority',
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error=_('priority cannot be set on global policy')
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)
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try:
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self.api.Command.cosentry_mod(
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keys[-1], cospriority=options['cospriority']
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)
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except errors.EmptyModlist, e:
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if len(entry_attrs) == 1: # cospriority only was passed
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raise e
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else:
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setattr(context, 'cosupdate', True)
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return dn
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def post_callback(self, ldap, dn, entry_attrs, *keys, **options):
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rights = options.get('all', False) and options.get('rights', False)
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self.obj.add_cospriority(entry_attrs, keys[-1], rights)
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self.obj.convert_time_for_output(entry_attrs, **options)
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return dn
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def exc_callback(self, keys, options, exc, call_func, *call_args, **call_kwargs):
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if call_func.func_name == 'update_entry':
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if isinstance(exc, errors.EmptyModlist):
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entry_attrs = call_args[1]
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cosupdate = getattr(context, 'cosupdate')
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if not entry_attrs or cosupdate:
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return
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raise exc
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api.register(pwpolicy_mod)
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class pwpolicy_show(LDAPRetrieve):
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__doc__ = _('Display information about password policy.')
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takes_options = LDAPRetrieve.takes_options + (
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Str('user?',
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label=_('User'),
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doc=_('Display effective policy for a specific user'),
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),
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)
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def pre_callback(self, ldap, dn, attrs_list, *keys, **options):
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if options.get('user') is not None:
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user_entry = self.api.Command.user_show(
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options['user'], all=True
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)['result']
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if 'krbpwdpolicyreference' in user_entry:
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return user_entry.get('krbpwdpolicyreference', [dn])[0]
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return dn
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def post_callback(self, ldap, dn, entry_attrs, *keys, **options):
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rights = options.get('all', False) and options.get('rights', False)
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self.obj.add_cospriority(entry_attrs, keys[-1], rights)
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self.obj.convert_time_for_output(entry_attrs, **options)
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return dn
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api.register(pwpolicy_show)
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class pwpolicy_find(LDAPSearch):
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__doc__ = _('Search for group password policies.')
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# this command does custom sorting in post_callback
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sort_result_entries = False
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def priority_sort_key(self, entry):
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"""Key for sorting password policies
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returns a pair: (is_global, priority)
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"""
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# global policy will be always last in the output
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if entry[1]['cn'][0] == global_policy_name:
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return True, 0
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else:
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# policies with higher priority (lower number) will be at the
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# beginning of the list
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try:
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cospriority = entry[1]['cospriority'][0]
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except KeyError:
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# if cospriority is not present in the entry, rather return 0
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# than crash
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cospriority = 0
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return False, cospriority
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def post_callback(self, ldap, entries, truncated, *args, **options):
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for e in entries:
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# When pkey_only flag is on, entries should contain only a cn.
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# Add a cospriority attribute that will be used for sorting.
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# Attribute rights are not allowed for pwpolicy_find.
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self.obj.add_cospriority(e[1], e[1]['cn'][0], rights=False)
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self.obj.convert_time_for_output(e[1], **options)
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# do custom entry sorting by its cospriority
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entries.sort(key=self.priority_sort_key)
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if options.get('pkey_only', False):
|
|
# remove cospriority that was used for sorting
|
|
for e in entries:
|
|
try:
|
|
del e[1]['cospriority']
|
|
except KeyError:
|
|
pass
|
|
|
|
return truncated
|
|
|
|
api.register(pwpolicy_find)
|