diff options
Diffstat (limited to 'ipaserver/install/plugins')
| -rw-r--r-- | ipaserver/install/plugins/update_managed_permissions.py | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/ipaserver/install/plugins/update_managed_permissions.py b/ipaserver/install/plugins/update_managed_permissions.py new file mode 100644 index 000000000..603f3f0b7 --- /dev/null +++ b/ipaserver/install/plugins/update_managed_permissions.py @@ -0,0 +1,160 @@ +# Authors: +# Petr Viktorin <pviktori@redhat.com> +# +# Copyright (C) 2014 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/>. + +from ipalib import errors +from ipapython.dn import DN +from ipalib.plugable import Registry +from ipalib.plugins import aci +from ipalib.plugins.permission import permission +from ipaserver.plugins.ldap2 import ldap2 +from ipaserver.install.plugins import LAST +from ipaserver.install.plugins.baseupdate import PostUpdate + + +register = Registry() + + +@register() +class update_managed_permissions(PostUpdate): + """Update managed permissions after an update. + + Update managed permissions according to templates specified in plugins. + For read permissions, puts any attributes specified in the legacy + Anonymous access ACI in the exclude list when creating the permission. + """ + order = LAST + + def get_anonymous_read_blacklist(self, ldap): + """Get the list of attributes from the legacy anonymous access ACI""" + aciname = u'Enable Anonymous access' + aciprefix = u'none' + + base_entry = ldap.get_entry(self.api.env.basedn, ['aci']) + + acistrs = base_entry.get('aci', []) + acilist = aci._convert_strings_to_acis(acistrs) + try: + rawaci = aci._find_aci_by_name(acilist, aciprefix, aciname) + except errors.NotFound: + self.log.info('Anonymous ACI not found, using no blacklist') + return [] + + return rawaci.target['targetattr']['expression'] + + def execute(self, **options): + ldap = self.api.Backend[ldap2] + + anonymous_read_blacklist = self.get_anonymous_read_blacklist(ldap) + + self.log.info('Anonymous read blacklist: %s', anonymous_read_blacklist) + + for obj in self.api.Object(): + managed_permissions = getattr(obj, 'managed_permissions', {}) + if managed_permissions: + self.log.info('Updating managed permissions for %s', obj.name) + for name, template in managed_permissions.items(): + assert name.startswith('System:') + self.update_permission(ldap, + obj, + unicode(name), + template, + anonymous_read_blacklist) + + return False, False, () + + def update_permission(self, ldap, obj, name, template, + anonymous_read_blacklist): + """Update the given permission and the corresponding ACI""" + dn = self.api.Object[permission].get_dn(name) + + try: + attrs_list = self.api.Object[permission].default_attributes + entry = ldap.get_entry(dn, attrs_list) + is_new = False + except errors.NotFound: + entry = ldap.make_entry(dn) + is_new = True + + self.log.info('Updating managed permission: %s', name) + self.update_entry(obj, entry, template, + anonymous_read_blacklist, is_new=is_new) + + if is_new: + ldap.add_entry(entry) + else: + try: + ldap.update_entry(entry) + except errors.EmptyModlist: + self.log.debug('No changes to permission: %s', name) + return + + self.log.debug('Updating ACI for managed permission: %s', name) + + self.api.Object[permission].update_aci(entry) + + def update_entry(self, obj, entry, template, + anonymous_read_blacklist, is_new): + """Update the given permission Entry (without contacting LDAP)""" + + [name_ava] = entry.dn[0] + assert name_ava.attr == 'cn' + name = name_ava.value + entry.single_value['cn'] = name + + template = dict(template) + + # Common attributes + entry['objectclass'] = self.api.Object[permission].object_class + + entry['ipapermissiontype'] = [u'SYSTEM', u'V2', u'MANAGED'] + + # Object-specific attributes + ldap_filter = ['(objectclass=%s)' % oc + for oc in obj.permission_filter_objectclasses] + entry['ipapermtargetfilter'] = ldap_filter + + ipapermlocation = DN(obj.container_dn, self.api.env.basedn) + entry.single_value['ipapermlocation'] = ipapermlocation + + # Attributes from template + bindruletype = template.pop('ipapermbindruletype') + entry.single_value['ipapermbindruletype'] = bindruletype + + entry['ipapermright'] = list(template.pop('ipapermright')) + + # Add to the set of default attributes + attributes = set(template.pop('ipapermdefaultattr', ())) + attributes.update(entry.get('ipapermdefaultattr', ())) + attributes = set(a.lower() for a in attributes) + entry['ipapermdefaultattr'] = list(attributes) + + # Exclude attributes filtered from the global read ACI + if template.pop('replaces_global_anonymous_aci', False) and is_new: + read_blacklist = set(a.lower() for a in anonymous_read_blacklist) + read_blacklist &= attributes + if read_blacklist: + self.log.info('Excluded attributes for %s: %s', + name, ', '.join(read_blacklist)) + entry['ipapermexcludedattr'] = list(read_blacklist) + + # Sanity check + if template: + raise ValueError( + 'Unknown key(s) in managed permission template %s: %s' % ( + name, ', '.join(template.keys()))) |