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https://salsa.debian.org/freeipa-team/freeipa.git
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b4ad0d19a2
Aiming to support pylint 2.0 some functions and methods must have their return statements updated in order to fix two new violations: - `useless-return` (R1711): Useless return at end of function or method Emitted when a single "return" or "return None" statement is found at the end of function or method definition. This statement can safely be removed because Python will implicitly return None - `inconsistent-return-statements` (R1710): Either all return statements in a function should return an expression, or none of them should. According to PEP8, if any return statement returns an expression, any return statements where no value is returned should explicitly state this as return None, and an explicit return statement should be present at the end of the function (if reachable) Issue: https://pagure.io/freeipa/issue/7614 Signed-off-by: Armando Neto <abiagion@redhat.com> Reviewed-By: Christian Heimes <cheimes@redhat.com>
362 lines
12 KiB
Python
362 lines
12 KiB
Python
# Authors:
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# Ana Krivokapic <akrivoka@redhat.com>
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#
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# Copyright (C) 2013 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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import six
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from ipalib import api, errors, messages
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from ipalib import Str, Flag
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from ipalib import _
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from ipalib.plugable import Registry
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from .baseldap import LDAPObject, LDAPUpdate, LDAPRetrieve
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from ipalib.util import has_soa_or_ns_record, validate_domain_name
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from ipalib.util import detect_dns_zone_realm_type
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from ipapython.dn import DN
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if six.PY3:
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unicode = str
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__doc__ = _("""
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Realm domains
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Manage the list of domains associated with IPA realm.
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This list is useful for Domain Controllers from other realms which have
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established trust with this IPA realm. They need the information to know
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which request should be forwarded to KDC of this IPA realm.
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Automatic management: a domain is automatically added to the realm domains
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list when a new DNS Zone managed by IPA is created. Same applies for deletion.
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Externally managed DNS: domains which are not managed in IPA server DNS
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need to be manually added to the list using ipa realmdomains-mod command.
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EXAMPLES:
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Display the current list of realm domains:
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ipa realmdomains-show
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Replace the list of realm domains:
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ipa realmdomains-mod --domain=example.com
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ipa realmdomains-mod --domain={example1.com,example2.com,example3.com}
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Add a domain to the list of realm domains:
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ipa realmdomains-mod --add-domain=newdomain.com
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Delete a domain from the list of realm domains:
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ipa realmdomains-mod --del-domain=olddomain.com
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""")
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register = Registry()
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def _domain_name_normalizer(d):
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return d.lower().rstrip('.')
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def _domain_name_validator(ugettext, value):
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try:
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validate_domain_name(value, allow_slash=False)
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except ValueError as e:
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return unicode(e)
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return None
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@register()
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class realmdomains(LDAPObject):
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"""
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List of domains associated with IPA realm.
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"""
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container_dn = api.env.container_realm_domains
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permission_filter_objectclasses = ['domainrelatedobject']
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object_name = _('Realm domains')
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search_attributes = ['associateddomain']
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default_attributes = ['associateddomain']
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managed_permissions = {
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'System: Read Realm Domains': {
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'replaces_global_anonymous_aci': True,
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'ipapermbindruletype': 'all',
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'ipapermright': {'read', 'search', 'compare'},
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'ipapermdefaultattr': {
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'objectclass', 'cn', 'associateddomain',
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},
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},
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'System: Modify Realm Domains': {
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'ipapermbindruletype': 'permission',
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'ipapermright': {'write'},
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'ipapermdefaultattr': {
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'associatedDomain',
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},
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'default_privileges': {'DNS Administrators'},
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},
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}
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label = _('Realm Domains')
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label_singular = _('Realm Domains')
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takes_params = (
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Str('associateddomain+',
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_domain_name_validator,
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normalizer=_domain_name_normalizer,
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cli_name='domain',
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label=_('Domain'),
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),
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Str('add_domain?',
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_domain_name_validator,
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normalizer=_domain_name_normalizer,
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cli_name='add_domain',
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label=_('Add domain'),
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),
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Str('del_domain?',
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_domain_name_validator,
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normalizer=_domain_name_normalizer,
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cli_name='del_domain',
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label=_('Delete domain'),
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),
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)
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@register()
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class realmdomains_mod(LDAPUpdate):
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__doc__ = _("""
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Modify realm domains
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DNS check: When manually adding a domain to the list, a DNS check is
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performed by default. It ensures that the domain is associated with
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the IPA realm, by checking whether the domain has a _kerberos TXT record
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containing the IPA realm name. This check can be skipped by specifying
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--force option.
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Removal: when a realm domain which has a matching DNS zone managed by
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IPA is being removed, a corresponding _kerberos TXT record in the zone is
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removed automatically as well. Other records in the zone or the zone
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itself are not affected.
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""")
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takes_options = LDAPUpdate.takes_options + (
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Flag('force',
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label=_('Force'),
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doc=_('Force adding domain even if not in DNS'),
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),
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)
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def validate_domains(self, domains, force):
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"""
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Validates the list of domains as candidates for additions to the
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realmdomains list.
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Requirements:
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- Each domain has SOA or NS record
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- Each domain belongs to the current realm
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"""
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# Unless forced, check that each domain has SOA or NS records
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if not force:
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invalid_domains = [
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d for d in domains
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if not has_soa_or_ns_record(d)
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]
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if invalid_domains:
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raise errors.ValidationError(
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name='domain',
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error= _(
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"DNS zone for each realmdomain must contain "
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"SOA or NS records. No records found for: %s"
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) % ','.join(invalid_domains)
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)
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# Check realm alliegence for each domain
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domains_with_realm = [
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(domain, detect_dns_zone_realm_type(self.api, domain))
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for domain in domains
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]
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foreign_domains = [
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domain for domain, realm in domains_with_realm
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if realm == 'foreign'
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]
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unknown_domains = [
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domain for domain, realm in domains_with_realm
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if realm == 'unknown'
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]
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# If there are any foreing realm domains, bail out
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if foreign_domains:
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raise errors.ValidationError(
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name='domain',
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error=_(
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'The following domains do not belong '
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'to this realm: %(domains)s'
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) % dict(domains=','.join(foreign_domains))
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)
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# If there are any unknown domains, error out,
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# asking for _kerberos TXT records
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# Note: This can be forced, since realmdomains-mod
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# is called from dnszone-add where we know that
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# the domain being added belongs to our realm
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if not force and unknown_domains:
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raise errors.ValidationError(
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name='domain',
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error=_(
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'The realm of the following domains could '
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'not be detected: %(domains)s. If these are '
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'domains that belong to the this realm, please '
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'create a _kerberos TXT record containing "%(realm)s" '
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'in each of them.'
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) % dict(domains=','.join(unknown_domains),
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realm=self.api.env.realm)
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)
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def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
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assert isinstance(dn, DN)
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associateddomain = entry_attrs.get('associateddomain')
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add_domain = entry_attrs.get('add_domain')
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del_domain = entry_attrs.get('del_domain')
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force = options.get('force')
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current_domain = self.api.env.domain
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# User specified the list of domains explicitly
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if associateddomain:
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if add_domain or del_domain:
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raise errors.MutuallyExclusiveError(
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reason=_(
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"The --domain option cannot be used together "
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"with --add-domain or --del-domain. Use --domain "
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"to specify the whole realm domain list explicitly, "
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"to add/remove individual domains, use "
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"--add-domain/del-domain.")
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)
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# Make sure our domain is included in the list
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if current_domain not in associateddomain:
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raise errors.ValidationError(
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name='realmdomain list',
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error=_("IPA server domain cannot be omitted")
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)
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# Validate that each domain satisfies the requirements
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# for realmdomain
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self.validate_domains(domains=associateddomain, force=force)
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return dn
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# If --add-domain or --del-domain options were provided, read
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# the curent list from LDAP, modify it, and write the changes back
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domains = ldap.get_entry(dn)['associateddomain']
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if add_domain:
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self.validate_domains(domains=[add_domain], force=force)
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del entry_attrs['add_domain']
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domains.append(add_domain)
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if del_domain:
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if del_domain == current_domain:
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raise errors.ValidationError(
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name='del_domain',
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error=_("IPA server domain cannot be deleted")
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)
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del entry_attrs['del_domain']
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try:
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domains.remove(del_domain)
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except ValueError:
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raise errors.AttrValueNotFound(
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attr='associateddomain',
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value=del_domain
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)
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entry_attrs['associateddomain'] = domains
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return dn
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def execute(self, *keys, **options):
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dn = self.obj.get_dn(*keys, **options)
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ldap = self.obj.backend
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domains_old = set(ldap.get_entry(dn)['associateddomain'])
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result = super(realmdomains_mod, self).execute(*keys, **options)
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domains_new = set(ldap.get_entry(dn)['associateddomain'])
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domains_added = domains_new - domains_old
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domains_deleted = domains_old - domains_new
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# Add a _kerberos TXT record for zones that correspond with
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# domains which were added
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for domain in domains_added:
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# Skip our own domain
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if domain == api.env.domain:
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continue
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try:
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self.api.Command['dnsrecord_add'](
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unicode(domain),
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u'_kerberos',
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txtrecord=api.env.realm
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)
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except (errors.EmptyModlist, errors.NotFound,
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errors.ValidationError) as error:
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# If creation of the _kerberos TXT record failed, prompt
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# for manual intervention
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messages.add_message(
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options['version'],
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result,
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messages.KerberosTXTRecordCreationFailure(
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domain=domain,
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error=unicode(error),
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realm=self.api.env.realm
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)
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)
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# Delete _kerberos TXT record from zones that correspond with
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# domains which were deleted
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for domain in domains_deleted:
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# Skip our own domain
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if domain == api.env.domain:
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continue
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try:
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self.api.Command['dnsrecord_del'](
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unicode(domain),
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u'_kerberos',
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txtrecord=api.env.realm
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)
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except (errors.AttrValueNotFound, errors.NotFound,
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errors.ValidationError) as error:
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# If deletion of the _kerberos TXT record failed, prompt
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# for manual intervention
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messages.add_message(
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options['version'],
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result,
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messages.KerberosTXTRecordDeletionFailure(
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domain=domain, error=unicode(error)
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)
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)
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return result
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@register()
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class realmdomains_show(LDAPRetrieve):
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__doc__ = _('Display the list of realm domains.')
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