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02b5074d84
For groups, we will need to filter on either posixgroup (which UPGs have but non-posix groups don't) and groupofnames/nestedgroup (which normal groups have but UPGs don't). Join permission_filter_objectclasses with `|` and add them as a single ipapermtargetfilter value. Part of the work for: https://fedorahosted.org/freeipa/ticket/3566 Reviewed-By: Martin Kosek <mkosek@redhat.com>
593 lines
25 KiB
Python
593 lines
25 KiB
Python
# Authors:
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# Petr Viktorin <pviktori@redhat.com>
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#
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# Copyright (C) 2014 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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"""
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Plugin for updating managed permissions.
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The permissions are declared in Object plugins in the "managed_permissions"
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attribute, which is a dictionary mapping permission names to a "template"
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for the updater.
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For example, an entry could look like this:
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managed_permissions = {
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'System: Read Object A': {
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'ipapermbindruletype': 'all',
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'ipapermright': {'read', 'search', 'compare'},
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'ipapermdefaultattr': {'cn', 'description'},
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'replaces_global_anonymous_aci': True,
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},
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}
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For permissions not tied to an object plugin, a NONOBJECT_PERMISSIONS
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dict of the same format is defined in this module.
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The permission name must start with the "System:" prefix.
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The template dictionary can have the following keys:
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* ipapermtarget, ipapermtargetfilter, ipapermlocation, ipapermright, objectclass
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- Directly used as attributes on the permission.
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- Replaced when upgrading an existing permission
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- If not specified, these default to the defaults of a permission of the
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corresponding --type, or, if non_object is specified, or if not on an
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object, to general permission defaults .
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- ipapermlocation and ipapermtarget must be DNs
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- ipapermtargetfilter and objectclass must be iterables of strings
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* ipapermbindruletype
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- Directly used as attribute on the permission.
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- Not replaced when upgrading an existing permission.
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* ipapermdefaultattr
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- Used as attribute of the permission.
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- When upgrading, only new values are added; all old values are kept.
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* default_privileges
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- Names of privileges to add the permission to
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- Only applied on newly created permissions
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* replaces_global_anonymous_aci
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- If true, any attributes specified (denied) in the legacy global anonymous
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read ACI will be added to excluded_attributes of the new permission.
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- Has no effect when existing permissions are updated.
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* non_object
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- If true, no object-specific defaults are used (e.g. for
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ipapermtargetfilter, ipapermlocation).
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* replaces
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- A list of ACIs corresponding to legacy default permissions replaced
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by this permission.
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* replaces_system
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- A list of names of old SYSTEM permissions this replaces.
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* fixup_function
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- A callable that may modify the template in-place before it is applied.
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- Called with the permission name, template dict, and keyword arguments:
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- is_new: true if the permission was previously existing
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- anonymous_read_aci: the legacy 'Enable Anonymous access' ACI as
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an ipalib.aci.ACI object, or None if it does not exist
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Extra keyword arguments must be ignored, since this list may grow
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in the future.
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No other keys are allowed in the template
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"""
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from ipalib import api, errors
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from ipapython.dn import DN
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from ipalib.plugable import Registry
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from ipalib.plugins import aci
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from ipalib.plugins.permission import permission, permission_del
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from ipalib.aci import ACI
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from ipapython import ipautil
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from ipaserver.plugins.ldap2 import ldap2
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from ipaserver.install.plugins import LAST
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from ipaserver.install.plugins.baseupdate import PostUpdate
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register = Registry()
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NONOBJECT_PERMISSIONS = {
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'System: Read IPA Masters': {
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'replaces_global_anonymous_aci': True,
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'ipapermlocation': DN('cn=masters,cn=ipa,cn=etc', api.env.basedn),
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'ipapermtargetfilter': {'(objectclass=nscontainer)'},
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'ipapermbindruletype': 'permission',
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'ipapermright': {'read', 'search', 'compare'},
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'ipapermdefaultattr': {
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'cn', 'objectclass', 'ipaconfigstring',
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},
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'default_privileges': {'IPA Masters Readers'},
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},
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'System: Read DNA Configuration': {
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'replaces_global_anonymous_aci': True,
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'ipapermlocation': DN('cn=dna,cn=ipa,cn=etc', api.env.basedn),
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'ipapermtargetfilter': {'(objectclass=dnasharedconfig)'},
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'ipapermbindruletype': 'all',
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'ipapermright': {'read', 'search', 'compare'},
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'ipapermdefaultattr': {
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'cn', 'objectclass', 'dnaHostname', 'dnaPortNum',
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'dnaSecurePortNum', 'dnaRemoteBindMethod', 'dnaRemoteConnProtocol',
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'dnaRemainingValues',
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},
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},
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'System: Read CA Renewal Information': {
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'replaces_global_anonymous_aci': True,
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'ipapermlocation': DN('cn=ca_renewal,cn=ipa,cn=etc', api.env.basedn),
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'ipapermtargetfilter': {'(objectclass=pkiuser)'},
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'ipapermbindruletype': 'all',
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'ipapermright': {'read', 'search', 'compare'},
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'ipapermdefaultattr': {
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'cn', 'objectclass', 'usercertificate',
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},
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},
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'System: Read CA Certificate': {
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'replaces_global_anonymous_aci': True,
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'ipapermlocation': DN('cn=CAcert,cn=ipa,cn=etc', api.env.basedn),
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'ipapermtargetfilter': {'(objectclass=pkica)'},
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'ipapermbindruletype': 'anonymous',
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'ipapermright': {'read', 'search', 'compare'},
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'ipapermdefaultattr': {
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'cn', 'objectclass', 'cacertificate', 'certificaterevocationlist',
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'authorityrevocationlist', 'crosscertificatepair',
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},
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},
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'System: Read Replication Information': {
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'replaces_global_anonymous_aci': True,
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'ipapermlocation': DN('cn=replication,cn=etc', api.env.basedn),
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'ipapermtargetfilter': {'(objectclass=nsds5replica)'},
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'ipapermbindruletype': 'all',
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'ipapermright': {'read', 'search', 'compare'},
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'ipapermdefaultattr': {
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'cn', 'objectclass', 'nsds5replicaroot', 'nsds5replicaid',
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'nsds5replicacleanruv', 'nsds5replicaabortcleanruv',
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'nsds5replicatype', 'nsds5replicabinddn', 'nsstate',
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'nsds5replicaname', 'nsds5flags', 'nsds5task',
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'nsds5replicareferral', 'nsds5replicaautoreferral',
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'nsds5replicapurgedelay', 'nsds5replicatombstonepurgeinterval',
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'nsds5replicachangecount', 'nsds5replicalegacyconsumer',
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'nsds5replicaprotocoltimeout', 'nsds5replicabackoffmin',
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'nsds5replicabackoffmax',
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},
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},
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'System: Read AD Domains': {
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'replaces_global_anonymous_aci': True,
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'ipapermlocation': DN('cn=etc', api.env.basedn),
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'ipapermtarget': DN('cn=ad,cn=etc', api.env.basedn),
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'ipapermtargetfilter': {'(objectclass=ipantdomainattrs)'},
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'ipapermbindruletype': 'all',
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'ipapermright': {'read', 'search', 'compare'},
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'ipapermdefaultattr': {
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'cn', 'objectclass', 'ipantsecurityidentifier', 'ipantflatname',
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'ipantdomainguid', 'ipantfallbackprimarygroup',
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},
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},
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'System: Read Replication Agreements': {
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'ipapermlocation': DN('cn=config'),
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'ipapermtargetfilter': {
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'(|'
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'(objectclass=nsds5Replica)'
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'(objectclass=nsds5replicationagreement)'
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'(objectclass=nsDSWindowsReplicationAgreement)'
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'(objectClass=nsMappingTree)'
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')'
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},
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'ipapermbindruletype': 'permission',
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'ipapermright': {'read', 'search', 'compare'},
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'ipapermdefaultattr': {
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'cn', 'objectclass',
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# nsds5Replica
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'nsds5replicaroot', 'nsds5replicaid', 'nsds5replicacleanruv',
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'nsds5replicaabortcleanruv', 'nsds5replicatype',
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'nsds5replicabinddn', 'nsstate', 'nsds5replicaname',
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'nsds5flags', 'nsds5task', 'nsds5replicareferral',
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'nsds5replicaautoreferral', 'nsds5replicapurgedelay',
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'nsds5replicatombstonepurgeinterval', 'nsds5replicachangecount',
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'nsds5replicalegacyconsumer', 'nsds5replicaprotocoltimeout',
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'nsds5replicabackoffmin', 'nsds5replicabackoffmax',
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# nsds5replicationagreement
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'nsds5replicacleanruvnotified', 'nsds5replicahost',
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'nsds5replicaport', 'nsds5replicatransportinfo',
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'nsds5replicabinddn', 'nsds5replicacredentials',
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'nsds5replicabindmethod', 'nsds5replicaroot',
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'nsds5replicatedattributelist',
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'nsds5replicatedattributelisttotal', 'nsds5replicaupdateschedule',
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'nsds5beginreplicarefresh', 'description', 'nsds50ruv',
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'nsruvreplicalastmodified', 'nsds5replicatimeout',
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'nsds5replicachangessentsincestartup', 'nsds5replicalastupdateend',
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'nsds5replicalastupdatestart', 'nsds5replicalastupdatestatus',
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'nsds5replicaupdateinprogress', 'nsds5replicalastinitend',
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'nsds5replicaenabled', 'nsds5replicalastinitstart',
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'nsds5replicalastinitstatus', 'nsds5debugreplicatimeout',
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'nsds5replicabusywaittime', 'nsds5replicastripattrs',
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'nsds5replicasessionpausetime', 'nsds5replicaprotocoltimeout',
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# nsDSWindowsReplicationAgreement
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'nsds5replicahost', 'nsds5replicaport',
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'nsds5replicatransportinfo', 'nsds5replicabinddn',
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'nsds5replicacredentials', 'nsds5replicabindmethod',
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'nsds5replicaroot', 'nsds5replicatedattributelist',
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'nsds5replicaupdateschedule', 'nsds5beginreplicarefresh',
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'description', 'nsds50ruv', 'nsruvreplicalastmodified',
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'nsds5replicatimeout', 'nsds5replicachangessentsincestartup',
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'nsds5replicalastupdateend', 'nsds5replicalastupdatestart',
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'nsds5replicalastupdatestatus', 'nsds5replicaupdateinprogress',
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'nsds5replicalastinitend', 'nsds5replicalastinitstart',
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'nsds5replicalastinitstatus', 'nsds5debugreplicatimeout',
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'nsds5replicabusywaittime', 'nsds5replicasessionpausetime',
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'nsds7windowsreplicasubtree', 'nsds7directoryreplicasubtree',
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'nsds7newwinusersyncenabled', 'nsds7newwingroupsyncenabled',
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'nsds7windowsdomain', 'nsds7dirsynccookie', 'winsyncinterval',
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'onewaysync', 'winsyncmoveaction', 'nsds5replicaenabled',
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'winsyncdirectoryfilter', 'winsyncwindowsfilter',
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'winsyncsubtreepair',
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},
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'default_privileges': {'Replication Administrators'},
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}
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}
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class IncompatibleACIModification(Exception):
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"""User has made a legacy default perm modification we can't handle"""
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@register()
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class update_managed_permissions(PostUpdate):
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"""Update managed permissions after an update.
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Update managed permissions according to templates specified in plugins.
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For read permissions, puts any attributes specified in the legacy
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Anonymous access ACI in the exclude list when creating the permission.
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"""
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order = LAST
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def get_anonymous_read_aci(self, ldap):
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aciname = u'Enable Anonymous access'
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aciprefix = u'none'
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base_entry = ldap.get_entry(self.api.env.basedn, ['aci'])
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acistrs = base_entry.get('aci', [])
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acilist = aci._convert_strings_to_acis(acistrs)
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try:
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return aci._find_aci_by_name(acilist, aciprefix, aciname)
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except errors.NotFound:
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return None
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def remove_anonymous_read_aci(self, ldap, anonymous_read_aci):
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base_entry = ldap.get_entry(self.api.env.basedn, ['aci'])
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acistrs = base_entry.get('aci', [])
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for acistr in acistrs:
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if ACI(acistr).isequal(anonymous_read_aci):
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self.log.info('Removing anonymous ACI: %s', acistr)
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acistrs.remove(acistr)
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break
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else:
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return
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ldap.update_entry(base_entry)
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def get_templates(self):
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"""Return (name, template, obj) triples for all managed permissions
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If the permission is not defined in an object plugin, obj is None.
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Entries with the same obj are returned consecutively.
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"""
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for obj in sorted(self.api.Object(), key=lambda o: o.name):
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managed_permissions = getattr(obj, 'managed_permissions', {})
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for name, template in sorted(managed_permissions.iteritems()):
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yield name, template, obj
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for name, template in sorted(NONOBJECT_PERMISSIONS.iteritems()):
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yield name, template, None
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def execute(self, **options):
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ldap = self.api.Backend[ldap2]
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anonymous_read_aci = self.get_anonymous_read_aci(ldap)
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if anonymous_read_aci:
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self.log.info('Anonymous read ACI: %s', anonymous_read_aci)
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else:
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self.log.info('Anonymous ACI not found')
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current_obj = () # initially distinct from any obj value, even None
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for name, template, obj in self.get_templates():
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if current_obj != obj:
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if obj:
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self.log.info('Updating managed permissions for %s',
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obj.name)
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else:
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self.log.info('Updating non-object managed permissions')
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current_obj = obj
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self.update_permission(ldap,
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obj,
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unicode(name),
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template,
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anonymous_read_aci)
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if anonymous_read_aci:
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self.remove_anonymous_read_aci(ldap, anonymous_read_aci)
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return False, False, ()
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def update_permission(self, ldap, obj, name, template, anonymous_read_aci):
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"""Update the given permission and the corresponding ACI"""
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assert name.startswith('System:')
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dn = self.api.Object[permission].get_dn(name)
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permission_plugin = self.api.Object[permission]
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try:
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attrs_list = list(permission_plugin.default_attributes)
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attrs_list.remove('memberindirect')
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entry = ldap.get_entry(dn, attrs_list)
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is_new = False
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except errors.NotFound:
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entry = ldap.make_entry(dn)
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is_new = True
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self.update_entry(obj, entry, template,
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anonymous_read_aci, is_new=is_new)
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remove_legacy = False
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if 'replaces' in template:
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sub_dict = {
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'SUFFIX': str(self.api.env.basedn),
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'REALM': str(self.api.env.realm),
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}
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legacy_acistrs = [ipautil.template_str(r, sub_dict)
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for r in template['replaces']]
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legacy_aci = ACI(legacy_acistrs[0])
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prefix, sep, legacy_name = legacy_aci.name.partition(':')
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assert prefix == 'permission' and sep
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legacy_dn = permission_plugin.get_dn(legacy_name)
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try:
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legacy_entry = ldap.get_entry(legacy_dn,
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['ipapermissiontype', 'cn'])
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except errors.NotFound:
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self.log.debug("Legacy permission %s not found", legacy_name)
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else:
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if 'ipapermissiontype' not in legacy_entry:
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if is_new:
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acientry, acistr = (
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permission_plugin._get_aci_entry_and_string(
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legacy_entry, notfound_ok=True))
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try:
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included, excluded = self.get_upgrade_attr_lists(
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acistr, legacy_acistrs)
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except IncompatibleACIModification:
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self.log.error(
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"Permission '%s' has been modified from its "
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"default; not updating it to '%s'.",
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legacy_name, name)
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return
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else:
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self.log.debug("Merging attributes from legacy "
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"permission '%s'", legacy_name)
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self.log.debug("Included attrs: %s",
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', '.join(sorted(included)))
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self.log.debug("Excluded attrs: %s",
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', '.join(sorted(excluded)))
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entry['ipapermincludedattr'] = list(included)
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entry['ipapermexcludedattr'] = list(excluded)
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remove_legacy = True
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else:
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self.log.debug("Ignoring attributes in legacy "
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"permission '%s' because '%s' exists",
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legacy_name, name)
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remove_legacy = True
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else:
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self.log.debug("Ignoring V2 permission named '%s'" %
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legacy_name)
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update_aci = True
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self.log.debug('Updating managed permission: %s', name)
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if is_new:
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ldap.add_entry(entry)
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else:
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try:
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ldap.update_entry(entry)
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except errors.EmptyModlist:
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self.log.debug('No changes to permission: %s', name)
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update_aci = False
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if update_aci:
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self.log.debug('Updating ACI for managed permission: %s', name)
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permission_plugin.update_aci(entry)
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if remove_legacy:
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self.log.info("Removing legacy permission '%s'", legacy_name)
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self.api.Command[permission_del](unicode(legacy_name))
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for name in template.get('replaces_system', ()):
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name = unicode(name)
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try:
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entry = ldap.get_entry(permission_plugin.get_dn(name),
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['ipapermissiontype'])
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except errors.NotFound:
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self.log.info("Legacy permission '%s' not found", name)
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else:
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flags = entry.get('ipapermissiontype', [])
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if list(flags) == ['SYSTEM']:
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self.log.info("Removing legacy permission '%s'", name)
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self.api.Command[permission_del](name, force=True)
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else:
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self.log.info("Ignoring V2 permission '%s'", name)
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def get_upgrade_attr_lists(self, current_acistring, default_acistrings):
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"""Compute included and excluded attributes for a new permission
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:param current_acistring: ACI is in LDAP currently
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:param default_acistrings:
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List of all default ACIs IPA historically used for this permission
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:return:
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|
(ipapermincludedattr, ipapermexcludedattr) for the upgraded
|
|
permission
|
|
|
|
An attribute will be included if the user has it in LDAP but it does
|
|
not appear in *any* historic ACI.
|
|
It will be excluded if it is in *all* historic ACIs but not in LDAP.
|
|
Rationale: When we don't know which version of an ACI the user is
|
|
upgrading from, we only consider attributes where all the versions
|
|
agree. For other attrs we'll use the default from the new managed perm.
|
|
|
|
If the ACIs differ in something else than the list of attributes,
|
|
raise IncompatibleACIModification. This means manual action is needed
|
|
(either delete the old permission or change it to resemble the default
|
|
again, then re-run ipa-ldap-updater).
|
|
|
|
In case there are multiple historic default ACIs, and some of them
|
|
are compatible with the current but other ones aren't, we deduce that
|
|
the user is upgrading from one of the compatible ones.
|
|
The incompatible ones are removed from consideration, both for
|
|
compatibility and attribute lists.
|
|
"""
|
|
assert default_acistrings
|
|
|
|
def _pop_targetattr(aci):
|
|
"""Return the attr list it as a set, clear it in the ACI object
|
|
"""
|
|
targetattr = aci.target.get('targetattr')
|
|
if targetattr:
|
|
attrs = targetattr['expression']
|
|
targetattr['expression'] = []
|
|
return set(t.lower() for t in attrs)
|
|
else:
|
|
return set()
|
|
|
|
current_aci = ACI(current_acistring)
|
|
current_attrs = _pop_targetattr(current_aci)
|
|
self.log.debug("Current ACI for '%s': %s",
|
|
current_aci.name, current_acistring)
|
|
|
|
attrs_in_all_defaults = None
|
|
attrs_in_any_defaults = set()
|
|
all_incompatible = True
|
|
for default_acistring in default_acistrings:
|
|
default_aci = ACI(default_acistring)
|
|
default_attrs = _pop_targetattr(default_aci)
|
|
self.log.debug("Default ACI for '%s': %s",
|
|
default_aci.name, default_acistring)
|
|
|
|
if current_aci != default_aci:
|
|
self.log.debug('ACIs not compatible')
|
|
continue
|
|
else:
|
|
all_incompatible = False
|
|
|
|
if attrs_in_all_defaults is None:
|
|
attrs_in_all_defaults = set(default_attrs)
|
|
else:
|
|
attrs_in_all_defaults &= attrs_in_all_defaults
|
|
attrs_in_any_defaults |= default_attrs
|
|
|
|
if all_incompatible:
|
|
self.log.debug('All old default ACIs are incompatible')
|
|
raise(IncompatibleACIModification())
|
|
|
|
included = current_attrs - attrs_in_any_defaults
|
|
excluded = attrs_in_all_defaults - current_attrs
|
|
|
|
return included, excluded
|
|
|
|
def update_entry(self, obj, entry, template,
|
|
anonymous_read_aci, 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)
|
|
template.pop('replaces', None)
|
|
template.pop('replaces_system', None)
|
|
template.pop('replaces_permissions', None)
|
|
template.pop('replaces_acis', None)
|
|
|
|
fixup_function = template.pop('fixup_function', None)
|
|
if fixup_function:
|
|
fixup_function(name, template,
|
|
is_new=is_new,
|
|
anonymous_read_aci=anonymous_read_aci)
|
|
|
|
if template.pop('non_object', False):
|
|
obj = None
|
|
|
|
entry['ipapermissiontype'] = [u'SYSTEM', u'V2', u'MANAGED']
|
|
|
|
# Attributes with defaults
|
|
objectclass = template.pop('objectclass', None)
|
|
if objectclass is None:
|
|
objectclass = self.api.Object[permission].object_class
|
|
entry['objectclass'] = list(objectclass)
|
|
|
|
ldap_filter = template.pop('ipapermtargetfilter', None)
|
|
if obj and ldap_filter is None:
|
|
ldap_filter = [self.api.Object[permission].make_type_filter(obj)]
|
|
entry['ipapermtargetfilter'] = list(ldap_filter or [])
|
|
|
|
ipapermlocation = template.pop('ipapermlocation', None)
|
|
if ipapermlocation is None:
|
|
assert obj
|
|
ipapermlocation = DN(obj.container_dn, self.api.env.basedn)
|
|
entry.single_value['ipapermlocation'] = ipapermlocation
|
|
|
|
# Optional attributes
|
|
ipapermtarget = template.pop('ipapermtarget', None)
|
|
if ipapermtarget is not None:
|
|
entry['ipapermtarget'] = ipapermtarget
|
|
|
|
# Attributes from template
|
|
bindruletype = template.pop('ipapermbindruletype', 'permission')
|
|
if is_new:
|
|
entry.single_value['ipapermbindruletype'] = bindruletype
|
|
|
|
entry['ipapermright'] = list(template.pop('ipapermright'))
|
|
|
|
default_privileges = template.pop('default_privileges', None)
|
|
if is_new and default_privileges:
|
|
entry['member'] = list(
|
|
DN(('cn', privilege_name),
|
|
self.api.env.container_privilege,
|
|
self.api.env.basedn)
|
|
for privilege_name in default_privileges)
|
|
|
|
# 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
|
|
replaces_ga_aci = template.pop('replaces_global_anonymous_aci', False)
|
|
if replaces_ga_aci and is_new and anonymous_read_aci:
|
|
read_blacklist = set(
|
|
a.lower() for a in
|
|
anonymous_read_aci.target['targetattr']['expression'])
|
|
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())))
|