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freeipa/ipaserver/plugins/automember.py
Martin Babinsky f0a61546f5 allow 'value' output param in commands without primary key 
`PrimaryKey` output param works only for API objects that have primary keys,
otherwise it expects None (nothing is associated with this param). Since the
validation of command output was tightened durng thin client effort, some
commands not honoring this contract began to fail output validation.

A custom output was implemented for them to restore their functionality. It
should however be considered as a fix for broken commands and not used
further.

https://fedorahosted.org/freeipa/ticket/6037
https://fedorahosted.org/freeipa/ticket/6061

Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: Jan Cholasta <jcholast@redhat.com>
2016-07-20 13:57:01 +02:00

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# Authors:
# Jr Aquino <jr.aquino@citrix.com>
#
# Copyright (C) 2011 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/>.
import uuid
import time
import ldap as _ldap
import six
from ipalib import api, errors, Str, StrEnum, DNParam, Flag, _, ngettext
from ipalib import output, Method, Object
from ipalib.plugable import Registry
from .baseldap import (
pkey_to_value,
entry_to_dict,
LDAPObject,
LDAPCreate,
LDAPUpdate,
LDAPDelete,
LDAPSearch,
LDAPRetrieve)
from ipalib.request import context
from ipapython.dn import DN
if six.PY3:
unicode = str
__doc__ = _("""
Auto Membership Rule.
""") + _("""
Bring clarity to the membership of hosts and users by configuring inclusive
or exclusive regex patterns, you can automatically assign a new entries into
a group or hostgroup based upon attribute information.
""") + _("""
A rule is directly associated with a group by name, so you cannot create
a rule without an accompanying group or hostgroup.
""") + _("""
A condition is a regular expression used by 389-ds to match a new incoming
entry with an automember rule. If it matches an inclusive rule then the
entry is added to the appropriate group or hostgroup.
""") + _("""
A default group or hostgroup could be specified for entries that do not
match any rule. In case of user entries this group will be a fallback group
because all users are by default members of group specified in IPA config.
""") + _("""
The automember-rebuild command can be used to retroactively run automember rules
against existing entries, thus rebuilding their membership.
""") + _("""
EXAMPLES:
""") + _("""
Add the initial group or hostgroup:
ipa hostgroup-add --desc="Web Servers" webservers
ipa group-add --desc="Developers" devel
""") + _("""
Add the initial rule:
ipa automember-add --type=hostgroup webservers
ipa automember-add --type=group devel
""") + _("""
Add a condition to the rule:
ipa automember-add-condition --key=fqdn --type=hostgroup --inclusive-regex=^web[1-9]+\.example\.com webservers
ipa automember-add-condition --key=manager --type=group --inclusive-regex=^uid=mscott devel
""") + _("""
Add an exclusive condition to the rule to prevent auto assignment:
ipa automember-add-condition --key=fqdn --type=hostgroup --exclusive-regex=^web5\.example\.com webservers
""") + _("""
Add a host:
ipa host-add web1.example.com
""") + _("""
Add a user:
ipa user-add --first=Tim --last=User --password tuser1 --manager=mscott
""") + _("""
Verify automembership:
ipa hostgroup-show webservers
Host-group: webservers
Description: Web Servers
Member hosts: web1.example.com
ipa group-show devel
Group name: devel
Description: Developers
GID: 1004200000
Member users: tuser
""") + _("""
Remove a condition from the rule:
ipa automember-remove-condition --key=fqdn --type=hostgroup --inclusive-regex=^web[1-9]+\.example\.com webservers
""") + _("""
Modify the automember rule:
ipa automember-mod
""") + _("""
Set the default (fallback) target group:
ipa automember-default-group-set --default-group=webservers --type=hostgroup
ipa automember-default-group-set --default-group=ipausers --type=group
""") + _("""
Remove the default (fallback) target group:
ipa automember-default-group-remove --type=hostgroup
ipa automember-default-group-remove --type=group
""") + _("""
Show the default (fallback) target group:
ipa automember-default-group-show --type=hostgroup
ipa automember-default-group-show --type=group
""") + _("""
Find all of the automember rules:
ipa automember-find
""") + _("""
Display a automember rule:
ipa automember-show --type=hostgroup webservers
ipa automember-show --type=group devel
""") + _("""
Delete an automember rule:
ipa automember-del --type=hostgroup webservers
ipa automember-del --type=group devel
""") + _("""
Rebuild membership for all users:
ipa automember-rebuild --type=group
""") + _("""
Rebuild membership for all hosts:
ipa automember-rebuild --type=hostgroup
""") + _("""
Rebuild membership for specified users:
ipa automember-rebuild --users=tuser1 --users=tuser2
""") + _("""
Rebuild membership for specified hosts:
ipa automember-rebuild --hosts=web1.example.com --hosts=web2.example.com
""")
register = Registry()
# Options used by Condition Add and Remove.
INCLUDE_RE = 'automemberinclusiveregex'
EXCLUDE_RE = 'automemberexclusiveregex'
REBUILD_TASK_CONTAINER = DN(('cn', 'automember rebuild membership'),
('cn', 'tasks'),
('cn', 'config'))
regex_attrs = (
Str('automemberinclusiveregex*',
cli_name='inclusive_regex',
label=_('Inclusive Regex'),
doc=_('Inclusive Regex'),
alwaysask=True,
flags={'no_create', 'no_update', 'no_search'},
),
Str('automemberexclusiveregex*',
cli_name='exclusive_regex',
label=_('Exclusive Regex'),
doc=_('Exclusive Regex'),
alwaysask=True,
flags={'no_create', 'no_update', 'no_search'},
),
)
regex_key = (
Str('key',
label=_('Attribute Key'),
doc=_('Attribute to filter via regex. For example fqdn for a host, or manager for a user'),
flags=['no_create', 'no_update', 'no_search']
),
)
group_type = (
StrEnum('type',
label=_('Grouping Type'),
doc=_('Grouping to which the rule applies'),
values=(u'group', u'hostgroup', ),
),
)
@register()
class automember(LDAPObject):
"""
Bring automember to a hostgroup with an Auto Membership Rule.
"""
container_dn = api.env.container_automember
object_name = 'Automember rule'
object_name_plural = 'Automember rules'
object_class = ['top', 'automemberregexrule']
permission_filter_objectclasses = ['automemberregexrule']
default_attributes = [
'automemberinclusiveregex', 'automemberexclusiveregex',
'cn', 'automembertargetgroup', 'description', 'automemberdefaultgroup'
]
managed_permissions = {
'System: Read Automember Definitions': {
'non_object': True,
'ipapermlocation': DN(container_dn, api.env.basedn),
'ipapermtargetfilter': {'(objectclass=automemberdefinition)'},
'replaces_global_anonymous_aci': True,
'ipapermright': {'read', 'search', 'compare'},
'ipapermdefaultattr': {
'objectclass', 'cn', 'automemberscope', 'automemberfilter',
'automembergroupingattr', 'automemberdefaultgroup',
'automemberdisabled',
},
'default_privileges': {'Automember Readers',
'Automember Task Administrator'},
},
'System: Read Automember Rules': {
'replaces_global_anonymous_aci': True,
'ipapermright': {'read', 'search', 'compare'},
'ipapermdefaultattr': {
'cn', 'objectclass', 'automembertargetgroup', 'description',
'automemberexclusiveregex', 'automemberinclusiveregex',
},
'default_privileges': {'Automember Readers',
'Automember Task Administrator'},
},
'System: Read Automember Tasks': {
'non_object': True,
'ipapermlocation': DN('cn=tasks', 'cn=config'),
'ipapermtarget': DN('cn=*', REBUILD_TASK_CONTAINER),
'replaces_global_anonymous_aci': True,
'ipapermright': {'read', 'search', 'compare'},
'ipapermdefaultattr': {'*'},
'default_privileges': {'Automember Task Administrator'},
},
}
label = _('Auto Membership Rule')
takes_params = (
Str('cn',
cli_name='automember_rule',
label=_('Automember Rule'),
doc=_('Automember Rule'),
primary_key=True,
normalizer=lambda value: value.lower(),
flags={'no_search'},
),
Str('description?',
cli_name='desc',
label=_('Description'),
doc=_('A description of this auto member rule'),
),
Str('automemberdefaultgroup?',
cli_name='default_group',
label=_('Default (fallback) Group'),
doc=_('Default group for entries to land'),
flags=['no_create', 'no_update', 'no_search']
),
) + regex_attrs
def dn_exists(self, otype, oname):
ldap = self.api.Backend.ldap2
dn = self.api.Object[otype].get_dn(oname)
try:
entry = ldap.get_entry(dn, [])
except errors.NotFound:
raise errors.NotFound(
reason=_(u'%(otype)s "%(oname)s" not found') %
dict(otype=otype, oname=oname)
)
return entry.dn
def get_dn(self, *keys, **options):
if self.parent_object:
parent_dn = self.api.Object[self.parent_object].get_dn(*keys[:-1])
else:
parent_dn = DN(self.container_dn, api.env.basedn)
grouptype = options['type']
try:
ndn = DN(('cn', keys[-1]), ('cn', grouptype), parent_dn)
except IndexError:
ndn = DN(('cn', grouptype), parent_dn)
return ndn
def check_attr(self, attr):
"""
Verify that the user supplied key is a valid attribute in the schema
"""
ldap = self.api.Backend.ldap2
obj = ldap.schema.get_obj(_ldap.schema.AttributeType, attr)
if obj is not None:
return obj
else:
raise errors.NotFound(reason=_('%s is not a valid attribute.') % attr)
def automember_container_exists(ldap):
try:
ldap.get_entry(DN(api.env.container_automember, api.env.basedn), [])
except errors.NotFound:
return False
return True
@register()
class automember_add(LDAPCreate):
__doc__ = _("""
Add an automember rule.
""")
takes_options = LDAPCreate.takes_options + group_type
msg_summary = _('Added automember rule "%(value)s"')
def pre_callback(self, ldap, dn, entry_attrs, *keys, **options):
assert isinstance(dn, DN)
entry_attrs['cn'] = keys[-1]
if not automember_container_exists(self.api.Backend.ldap2):
raise errors.NotFound(reason=_('Auto Membership is not configured'))
entry_attrs['automembertargetgroup'] = self.obj.dn_exists(options['type'], keys[-1])
return dn
def execute(self, *keys, **options):
result = super(automember_add, self).execute(*keys, **options)
result['value'] = pkey_to_value(keys[-1], options)
return result
@register()
class automember_add_condition(LDAPUpdate):
__doc__ = _("""
Add conditions to an automember rule.
""")
has_output_params = (
Str('failed',
label=_('Failed to add'),
flags=['suppress_empty'],
),
)
takes_options = regex_attrs + regex_key + group_type
msg_summary = _('Added condition(s) to "%(value)s"')
# Prepare the output to expect failed results
has_output = (
output.summary,
output.Entry('result'),
output.value,
output.Output('failed',
type=dict,
doc=_('Conditions that could not be added'),
),
output.Output('completed',
type=int,
doc=_('Number of conditions added'),
),
)
def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
assert isinstance(dn, DN)
# Check to see if the automember rule exists
try:
dn = ldap.get_entry(dn, []).dn
except errors.NotFound:
raise errors.NotFound(reason=_(u'Auto member rule: %s not found!') % keys[0])
# Define container key
key = options['key']
# Check to see if the attribute is valid
self.obj.check_attr(key)
key = '%s=' % key
completed = 0
failed = {'failed': {}}
for attr in (INCLUDE_RE, EXCLUDE_RE):
failed['failed'][attr] = []
if attr in options and options[attr]:
entry_attrs[attr] = [key + condition for condition in options[attr]]
completed += len(entry_attrs[attr])
try:
old_entry = ldap.get_entry(dn, [attr])
for regex in old_entry.keys():
if not isinstance(entry_attrs[regex], (list, tuple)):
entry_attrs[regex] = [entry_attrs[regex]]
duplicate = set(old_entry[regex]) & set(entry_attrs[regex])
if len(duplicate) > 0:
completed -= 1
else:
entry_attrs[regex] = list(entry_attrs[regex]) + old_entry[regex]
except errors.NotFound:
failed['failed'][attr].append(regex)
entry_attrs = entry_to_dict(entry_attrs, **options)
# Set failed and completed to they can be harvested in the execute super
setattr(context, 'failed', failed)
setattr(context, 'completed', completed)
setattr(context, 'entry_attrs', entry_attrs)
# Make sure to returned the failed results if there is nothing to remove
if completed == 0:
ldap.get_entry(dn, attrs_list)
raise errors.EmptyModlist
return dn
def execute(self, *keys, **options):
__doc__ = _("""
Override this so we can add completed and failed to the return result.
""")
try:
result = super(automember_add_condition, self).execute(*keys, **options)
except errors.EmptyModlist:
result = {'result': getattr(context, 'entry_attrs'), 'value': keys[-1]}
result['failed'] = getattr(context, 'failed')
result['completed'] = getattr(context, 'completed')
result['value'] = pkey_to_value(keys[-1], options)
return result
@register()
class automember_remove_condition(LDAPUpdate):
__doc__ = _("""
Remove conditions from an automember rule.
""")
takes_options = regex_attrs + regex_key + group_type
msg_summary = _('Removed condition(s) from "%(value)s"')
# Prepare the output to expect failed results
has_output = (
output.summary,
output.Entry('result'),
output.value,
output.Output('failed',
type=dict,
doc=_('Conditions that could not be removed'),
),
output.Output('completed',
type=int,
doc=_('Number of conditions removed'),
),
)
def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
assert isinstance(dn, DN)
# Check to see if the automember rule exists
try:
ldap.get_entry(dn, [])
except errors.NotFound:
raise errors.NotFound(reason=_(u'Auto member rule: %s not found!') % keys[0])
# Define container key
type_attr_default = {'group': 'manager', 'hostgroup': 'fqdn'}
if 'key' in options:
key = options['key']
else:
key = type_attr_default[options['type']]
key = '%s=' % key
completed = 0
failed = {'failed': {}}
# Check to see if there are existing exclusive conditions present.
dn = ldap.get_entry(dn, [EXCLUDE_RE]).dn
for attr in (INCLUDE_RE, EXCLUDE_RE):
failed['failed'][attr] = []
if attr in options and options[attr]:
entry_attrs[attr] = [key + condition for condition in options[attr]]
entry_attrs_ = ldap.get_entry(dn, [attr])
old_entry = entry_attrs_.get(attr, [])
for regex in entry_attrs[attr]:
if regex in old_entry:
old_entry.remove(regex)
completed += 1
else:
failed['failed'][attr].append(regex)
entry_attrs[attr] = old_entry
entry_attrs = entry_to_dict(entry_attrs, **options)
# Set failed and completed to they can be harvested in the execute super
setattr(context, 'failed', failed)
setattr(context, 'completed', completed)
setattr(context, 'entry_attrs', entry_attrs)
# Make sure to returned the failed results if there is nothing to remove
if completed == 0:
ldap.get_entry(dn, attrs_list)
raise errors.EmptyModlist
return dn
def execute(self, *keys, **options):
__doc__ = _("""
Override this so we can set completed and failed.
""")
try:
result = super(automember_remove_condition, self).execute(*keys, **options)
except errors.EmptyModlist:
result = {'result': getattr(context, 'entry_attrs'), 'value': keys[-1]}
result['failed'] = getattr(context, 'failed')
result['completed'] = getattr(context, 'completed')
result['value'] = pkey_to_value(keys[-1], options)
return result
@register()
class automember_mod(LDAPUpdate):
__doc__ = _("""
Modify an automember rule.
""")
takes_options = LDAPUpdate.takes_options + group_type
msg_summary = _('Modified automember rule "%(value)s"')
def execute(self, *keys, **options):
result = super(automember_mod, self).execute(*keys, **options)
result['value'] = pkey_to_value(keys[-1], options)
return result
@register()
class automember_del(LDAPDelete):
__doc__ = _("""
Delete an automember rule.
""")
takes_options = group_type
msg_summary = _('Deleted automember rule "%(value)s"')
@register()
class automember_find(LDAPSearch):
__doc__ = _("""
Search for automember rules.
""")
takes_options = group_type
msg_summary = ngettext(
'%(count)d rules matched', '%(count)d rules matched', 0
)
def pre_callback(self, ldap, filters, attrs_list, base_dn, scope, *args, **options):
assert isinstance(base_dn, DN)
scope = ldap.SCOPE_SUBTREE
ndn = DN(('cn', options['type']), base_dn)
return (filters, ndn, scope)
@register()
class automember_show(LDAPRetrieve):
__doc__ = _("""
Display information about an automember rule.
""")
takes_options = group_type
def execute(self, *keys, **options):
result = super(automember_show, self).execute(*keys, **options)
result['value'] = pkey_to_value(keys[-1], options)
return result
@register()
class automember_default_group(automember):
managed_permissions = {}
def get_params(self):
for param in super(automember_default_group, self).get_params():
if param.name == 'cn':
continue
yield param
@register()
class automember_default_group_set(LDAPUpdate):
__doc__ = _("""
Set default (fallback) group for all unmatched entries.
""")
obj_name = 'automember_default_group'
takes_options = (
Str('automemberdefaultgroup',
cli_name='default_group',
label=_('Default (fallback) Group'),
doc=_('Default (fallback) group for entries to land'),
flags=['no_create', 'no_update']
),
) + group_type
msg_summary = _('Set default (fallback) group for automember "%(value)s"')
has_output = output.simple_entry
def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
dn = DN(('cn', options['type']), api.env.container_automember,
api.env.basedn)
entry_attrs['automemberdefaultgroup'] = self.obj.dn_exists(options['type'], options['automemberdefaultgroup'])
return dn
def execute(self, *keys, **options):
result = super(automember_default_group_set, self).execute(*keys, **options)
result['value'] = pkey_to_value(options['type'], options)
return result
@register()
class automember_default_group_remove(LDAPUpdate):
__doc__ = _("""
Remove default (fallback) group for all unmatched entries.
""")
obj_name = 'automember_default_group'
takes_options = group_type
msg_summary = _('Removed default (fallback) group for automember "%(value)s"')
has_output = output.simple_entry
def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
dn = DN(('cn', options['type']), api.env.container_automember,
api.env.basedn)
attr = 'automemberdefaultgroup'
entry_attrs_ = ldap.get_entry(dn, [attr])
if attr not in entry_attrs_:
raise errors.NotFound(reason=_(u'No default (fallback) group set'))
else:
entry_attrs[attr] = []
return entry_attrs_.dn
def post_callback(self, ldap, dn, entry_attrs, *keys, **options):
assert isinstance(dn, DN)
if 'automemberdefaultgroup' not in entry_attrs:
entry_attrs['automemberdefaultgroup'] = unicode(_('No default (fallback) group set'))
return dn
def execute(self, *keys, **options):
result = super(automember_default_group_remove, self).execute(*keys, **options)
result['value'] = pkey_to_value(options['type'], options)
return result
@register()
class automember_default_group_show(LDAPRetrieve):
__doc__ = _("""
Display information about the default (fallback) automember groups.
""")
obj_name = 'automember_default_group'
takes_options = group_type
has_output = output.simple_entry
def pre_callback(self, ldap, dn, attrs_list, *keys, **options):
dn = DN(('cn', options['type']), api.env.container_automember,
api.env.basedn)
return dn
def post_callback(self, ldap, dn, entry_attrs, *keys, **options):
assert isinstance(dn, DN)
if 'automemberdefaultgroup' not in entry_attrs:
entry_attrs['automemberdefaultgroup'] = unicode(_('No default (fallback) group set'))
return dn
def execute(self, *keys, **options):
result = super(automember_default_group_show, self).execute(*keys, **options)
result['value'] = pkey_to_value(options['type'], options)
return result
@register()
class automember_task(Object):
takes_params = (
DNParam(
'dn',
label=_('Task DN'),
doc=_('DN of the started task'),
),
)
@register()
class automember_rebuild(Method):
__doc__ = _('Rebuild auto membership.')
obj_name = 'automember_task'
attr_name = 'rebuild'
# TODO: Add a --dry-run option:
# https://fedorahosted.org/freeipa/ticket/3936
takes_options = (
group_type[0].clone(
required=False,
label=_('Rebuild membership for all members of a grouping')
),
Str(
'users*',
label=_('Users'),
doc=_('Rebuild membership for specified users'),
),
Str(
'hosts*',
label=_('Hosts'),
doc=_('Rebuild membership for specified hosts'),
),
Flag(
'no_wait?',
default=False,
label=_('No wait'),
doc=_("Don't wait for rebuilding membership"),
),
)
has_output = output.standard_entry
def validate(self, **kw):
"""
Validation rules:
- at least one of 'type', 'users', 'hosts' is required
- 'users' and 'hosts' cannot be combined together
- if 'users' and 'type' are specified, 'type' must be 'group'
- if 'hosts' and 'type' are specified, 'type' must be 'hostgroup'
"""
super(automember_rebuild, self).validate(**kw)
users, hosts, gtype = kw.get('users'), kw.get('hosts'), kw.get('type')
if not (gtype or users or hosts):
raise errors.MutuallyExclusiveError(
reason=_('at least one of options: type, users, hosts must be '
'specified')
)
if users and hosts:
raise errors.MutuallyExclusiveError(
reason=_("users and hosts cannot both be set")
)
if gtype == 'group' and hosts:
raise errors.MutuallyExclusiveError(
reason=_("hosts cannot be set when type is 'group'")
)
if gtype == 'hostgroup' and users:
raise errors.MutuallyExclusiveError(
reason=_("users cannot be set when type is 'hostgroup'")
)
def execute(self, *keys, **options):
ldap = self.api.Backend.ldap2
cn = str(uuid.uuid4())
gtype = options.get('type')
if not gtype:
gtype = 'group' if options.get('users') else 'hostgroup'
types = {
'group': (
'user',
'users',
DN(api.env.container_user, api.env.basedn)
),
'hostgroup': (
'host',
'hosts',
DN(api.env.container_host, api.env.basedn)
),
}
obj_name, opt_name, basedn = types[gtype]
obj = self.api.Object[obj_name]
names = options.get(opt_name)
if names:
for name in names:
try:
obj.get_dn_if_exists(name)
except errors.NotFound:
obj.handle_not_found(name)
search_filter = ldap.make_filter_from_attr(
obj.primary_key.name,
names,
rules=ldap.MATCH_ANY
)
else:
search_filter = '(%s=*)' % obj.primary_key.name
task_dn = DN(('cn', cn), REBUILD_TASK_CONTAINER)
entry = ldap.make_entry(
task_dn,
objectclass=['top', 'extensibleObject'],
cn=[cn],
basedn=[basedn],
filter=[search_filter],
scope=['sub'],
ttl=[3600])
ldap.add_entry(entry)
summary = _('Automember rebuild membership task started')
result = {'dn': task_dn}
if not options.get('no_wait'):
summary = _('Automember rebuild membership task completed')
result = {}
start_time = time.time()
while True:
try:
task = ldap.get_entry(task_dn)
except errors.NotFound:
break
if 'nstaskexitcode' in task:
if str(task.single_value['nstaskexitcode']) == '0':
summary=task.single_value['nstaskstatus']
break
else:
raise errors.DatabaseError(
desc=task.single_value['nstaskstatus'],
info=_("Task DN = '%s'" % task_dn))
time.sleep(1)
if time.time() > (start_time + 60):
raise errors.TaskTimeout(task=_('Automember'), task_dn=task_dn)
return dict(
result=result,
summary=unicode(summary),
value=pkey_to_value(None, options))
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