/usr/lib/python2.7/dist-packages/ipaserver/plugins/permission.py is in python-ipaserver 4.7.0~pre1+git20180411-2ubuntu2.
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# Petr Viktorin <pviktori@redhat.com>
#
# Copyright (C) 2013 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 logging
import re
import traceback
import six
from . import baseldap
from .privilege import validate_permission_to_privilege
from ipalib import errors
from ipalib.parameters import Str, StrEnum, DNParam, Flag
from ipalib import api, _, ngettext
from ipalib.plugable import Registry
from ipalib.capabilities import client_has_capability
from ipalib.aci import ACI
from ipapython.dn import DN
from ipalib.request import context
if six.PY3:
unicode = str
__doc__ = _("""
Permissions
""") + _("""
A permission enables fine-grained delegation of rights. A permission is
a human-readable wrapper around a 389-ds Access Control Rule,
or instruction (ACI).
A permission grants the right to perform a specific task such as adding a
user, modifying a group, etc.
""") + _("""
A permission may not contain other permissions.
""") + _("""
* A permission grants access to read, write, add, delete, read, search,
or compare.
* A privilege combines similar permissions (for example all the permissions
needed to add a user).
* A role grants a set of privileges to users, groups, hosts or hostgroups.
""") + _("""
A permission is made up of a number of different parts:
1. The name of the permission.
2. The target of the permission.
3. The rights granted by the permission.
""") + _("""
Rights define what operations are allowed, and may be one or more
of the following:
1. write - write one or more attributes
2. read - read one or more attributes
3. search - search on one or more attributes
4. compare - compare one or more attributes
5. add - add a new entry to the tree
6. delete - delete an existing entry
7. all - all permissions are granted
""") + _("""
Note the distinction between attributes and entries. The permissions are
independent, so being able to add a user does not mean that the user will
be editable.
""") + _("""
There are a number of allowed targets:
1. subtree: a DN; the permission applies to the subtree under this DN
2. target filter: an LDAP filter
3. target: DN with possible wildcards, specifies entries permission applies to
""") + _("""
Additionally, there are the following convenience options.
Setting one of these options will set the corresponding attribute(s).
1. type: a type of object (user, group, etc); sets subtree and target filter.
2. memberof: apply to members of a group; sets target filter
3. targetgroup: grant access to modify a specific group (such as granting
the rights to manage group membership); sets target.
""") + _("""
Managed permissions
""") + _("""
Permissions that come with IPA by default can be so-called "managed"
permissions. These have a default set of attributes they apply to,
but the administrator can add/remove individual attributes to/from the set.
""") + _("""
Deleting or renaming a managed permission, as well as changing its target,
is not allowed.
""") + _("""
EXAMPLES:
""") + _("""
Add a permission that grants the creation of users:
ipa permission-add --type=user --permissions=add "Add Users"
""") + _("""
Add a permission that grants the ability to manage group membership:
ipa permission-add --attrs=member --permissions=write --type=group "Manage Group Members"
""")
logger = logging.getLogger(__name__)
register = Registry()
_DEPRECATED_OPTION_ALIASES = {
'permissions': 'ipapermright',
'filter': 'extratargetfilter',
'subtree': 'ipapermlocation',
}
KNOWN_FLAGS = {'SYSTEM', 'V2', 'MANAGED'}
def strip_ldap_prefix(uri):
prefix = 'ldap:///'
if not uri.startswith(prefix):
raise ValueError('%r does not start with %r' % (uri, prefix))
return uri[len(prefix):]
def prevalidate_filter(ugettext, value):
if not value.startswith('(') or not value.endswith(')'):
return _('must be enclosed in parentheses')
class DNOrURL(DNParam):
"""DN parameter that allows, and strips, a "ldap:///" prefix on input
Used for ``subtree`` to maintain backward compatibility.
"""
def _convert_scalar(self, value, index=None):
if isinstance(value, six.string_types) and value.startswith('ldap:///'):
value = strip_ldap_prefix(value)
return super(DNOrURL, self)._convert_scalar(value)
def validate_type(ugettext, typestr):
try:
obj = api.Object[typestr]
except KeyError:
return _('"%s" is not an object type') % typestr
if not getattr(obj, 'permission_filter_objectclasses', None):
return _('"%s" is not a valid permission type') % typestr
def _disallow_colon(option):
"""Given a "cn" option, return a new "cn" option with ':' disallowed
Used in permission-add and for --rename in permission-mod to prevent user
from creating new permissions with ":" in the name.
"""
return option.clone(
pattern='^[-_ a-zA-Z0-9.]+$',
pattern_errmsg="May only contain letters, numbers, -, _, ., and space",
)
_ipapermissiontype_param = Str(
'ipapermissiontype+',
label=_('Permission flags'),
flags={'no_create', 'no_update', 'no_search'},
)
@register()
class permission(baseldap.LDAPObject):
"""
Permission object.
"""
container_dn = api.env.container_permission
object_name = _('permission')
object_name_plural = _('permissions')
# For use the complete object_class list, including 'top', so
# the updater doesn't try to delete 'top' every time.
object_class = ['top', 'groupofnames', 'ipapermission', 'ipapermissionv2']
permission_filter_objectclasses = ['ipapermission']
default_attributes = ['cn', 'member', 'memberof',
'memberindirect', 'ipapermissiontype', 'objectclass',
'ipapermdefaultattr', 'ipapermincludedattr', 'ipapermexcludedattr',
'ipapermbindruletype', 'ipapermlocation', 'ipapermright',
'ipapermtargetfilter', 'ipapermtarget'
]
attribute_members = {
'member': ['privilege'],
'memberindirect': ['role'],
}
allow_rename = True
managed_permissions = {
'System: Read Permissions': {
'replaces_global_anonymous_aci': True,
'ipapermright': {'read', 'search', 'compare'},
'ipapermdefaultattr': {
'businesscategory', 'cn', 'description', 'ipapermissiontype',
'o', 'objectclass', 'ou', 'owner', 'seealso',
'ipapermdefaultattr', 'ipapermincludedattr',
'ipapermexcludedattr', 'ipapermbindruletype', 'ipapermtarget',
'ipapermlocation', 'ipapermright', 'ipapermtargetfilter',
'member', 'memberof', 'memberuser', 'memberhost',
},
'default_privileges': {'RBAC Readers'},
},
'System: Read ACIs': {
# Readable ACIs are needed for reading legacy permissions.
'non_object': True,
'ipapermlocation': api.env.basedn,
'replaces_global_anonymous_aci': True,
'ipapermright': {'read', 'search', 'compare'},
'ipapermdefaultattr': {'aci'},
'default_privileges': {'RBAC Readers'},
},
'System: Modify Privilege Membership': {
'ipapermright': {'write'},
'ipapermdefaultattr': {'member'},
'replaces': [
'(targetattr = "member")(target = "ldap:///cn=*,cn=permissions,cn=pbac,$SUFFIX")(version 3.0;acl "permission:Modify privilege membership";allow (write) groupdn = "ldap:///cn=Modify privilege membership,cn=permissions,cn=pbac,$SUFFIX";)',
],
'default_privileges': {'Delegation Administrator'},
},
}
label = _('Permissions')
label_singular = _('Permission')
takes_params = (
Str('cn',
cli_name='name',
label=_('Permission name'),
primary_key=True,
pattern='^[-_ a-zA-Z0-9.:/]+$',
pattern_errmsg="May only contain letters, numbers, "
"-, _, ., :, /, and space",
),
StrEnum(
'ipapermright*',
cli_name='right',
label=_('Granted rights'),
doc=_('Rights to grant '
'(read, search, compare, write, add, delete, all)'),
values=(u'read', u'search', u'compare',
u'write', u'add', u'delete', u'all'),
flags={'ask_create'},
),
Str('attrs*',
label=_('Effective attributes'),
doc=_('All attributes to which the permission applies'),
flags={'virtual_attribute', 'allow_mod_for_managed_permission'},
),
Str('ipapermincludedattr*',
cli_name='includedattrs',
label=_('Included attributes'),
doc=_('User-specified attributes to which the permission applies'),
flags={'no_create', 'allow_mod_for_managed_permission'},
),
Str('ipapermexcludedattr*',
cli_name='excludedattrs',
label=_('Excluded attributes'),
doc=_('User-specified attributes to which the permission '
'explicitly does not apply'),
flags={'no_create', 'allow_mod_for_managed_permission'},
),
Str('ipapermdefaultattr*',
cli_name='defaultattrs',
label=_('Default attributes'),
doc=_('Attributes to which the permission applies by default'),
flags={'no_create', 'no_update'},
),
StrEnum(
'ipapermbindruletype',
cli_name='bindtype',
label=_('Bind rule type'),
doc=_('Bind rule type'),
autofill=True,
values=(u'permission', u'all', u'anonymous'),
default=u'permission',
flags={'allow_mod_for_managed_permission'},
),
DNOrURL(
'ipapermlocation?',
cli_name='subtree',
label=_('Subtree'),
doc=_('Subtree to apply permissions to'),
# force server-side conversion
normalizer=lambda x: x,
flags={'ask_create'},
),
Str(
'extratargetfilter*', prevalidate_filter,
cli_name='filter',
label=_('Extra target filter'),
doc=_('Extra target filter'),
flags={'virtual_attribute'},
),
Str(
'ipapermtargetfilter*', prevalidate_filter,
cli_name='rawfilter',
label=_('Raw target filter'),
doc=_('All target filters, including those implied by '
'type and memberof'),
),
DNParam(
'ipapermtarget?',
cli_name='target',
label=_('Target DN'),
doc=_('Optional DN to apply the permission to '
'(must be in the subtree, but may not yet exist)'),
),
DNParam(
'ipapermtargetto?',
cli_name='targetto',
label=_('Target DN subtree'),
doc=_('Optional DN subtree where an entry can be moved to '
'(must be in the subtree, but may not yet exist)'),
),
DNParam(
'ipapermtargetfrom?',
cli_name='targetfrom',
label=_('Origin DN subtree'),
doc=_('Optional DN subtree from where an entry can be moved '
'(must be in the subtree, but may not yet exist)'),
),
Str('memberof*',
label=_('Member of group'), # FIXME: Does this label make sense?
doc=_('Target members of a group (sets memberOf targetfilter)'),
flags={'ask_create', 'virtual_attribute'},
),
Str('targetgroup?',
label=_('Target group'),
doc=_('User group to apply permissions to (sets target)'),
flags={'ask_create', 'virtual_attribute'},
),
Str(
'type?', validate_type,
label=_('Type'),
doc=_('Type of IPA object '
'(sets subtree and objectClass targetfilter)'),
flags={'ask_create', 'virtual_attribute'},
),
) + tuple(
Str(old_name + '*',
doc=_('Deprecated; use %s' % new_name),
flags={'no_option', 'virtual_attribute'})
for old_name, new_name in _DEPRECATED_OPTION_ALIASES.items()
) + (
_ipapermissiontype_param,
Str('aci',
label=_('ACI'),
flags={'virtual_attribute', 'no_create', 'no_update', 'no_search'},
),
)
def reject_system(self, entry):
"""Raise if permission entry has unknown flags, or is a SYSTEM perm"""
flags = entry.get('ipapermissiontype', [])
for flag in flags:
if flag not in KNOWN_FLAGS:
raise errors.ACIError(
info=_('Permission with unknown flag %s may not be '
'modified or removed') % flag)
if list(flags) == [u'SYSTEM']:
raise errors.ACIError(
info=_('A SYSTEM permission may not be modified or removed'))
def _get_filter_attr_info(self, entry):
"""Get information on filter-related virtual attributes
Returns a dict with this information:
'implicit_targetfilters': targetfilters implied by memberof and type
'memberof': list of names of groups from memberof
'type': the type
"""
ipapermtargetfilter = entry.get('ipapermtargetfilter', [])
ipapermlocation = entry.single_value.get('ipapermlocation')
implicit_targetfilters = set()
result = {'implicit_targetfilters': implicit_targetfilters}
# memberof
memberof = []
for targetfilter in ipapermtargetfilter:
match = re.match('^\(memberof=(.*)\)$', targetfilter, re.I)
if match:
try:
dn = DN(match.group(1))
except ValueError:
# Malformed DN; e.g. (memberof=*)
continue
groups_dn = DN(self.api.Object.group.container_dn,
self.api.env.basedn)
if dn[1:] == groups_dn[:] and dn[0].attr == 'cn':
memberof.append(dn[0].value)
implicit_targetfilters.add(match.group(0))
if memberof:
result['memberof'] = memberof
# type
if ipapermtargetfilter and ipapermlocation:
for obj in self.api.Object():
filt = self.make_type_filter(obj)
if not filt:
continue
wantdn = DN(obj.container_dn, self.api.env.basedn)
if DN(ipapermlocation) != wantdn:
continue
if filt in ipapermtargetfilter:
result['type'] = [unicode(obj.name)]
implicit_targetfilters.add(filt)
break
return result
def postprocess_result(self, entry, options):
"""Update a permission entry for output (in place)
:param entry: The entry to update
:param options:
Command options. Contains keys such as ``raw``, ``all``,
``pkey_only``, ``version``.
"""
old_client = not client_has_capability(
options['version'], 'permissions2')
if not options.get('raw') and not options.get('pkey_only'):
ipapermtargetfilter = entry.get('ipapermtargetfilter', [])
ipapermtarget = entry.single_value.get('ipapermtarget')
# targetgroup
if ipapermtarget:
dn = DN(ipapermtarget)
if (dn[1:] == DN(self.api.Object.group.container_dn,
self.api.env.basedn)[:] and
dn[0].attr == 'cn' and dn[0].value != '*'):
entry.single_value['targetgroup'] = dn[0].value
filter_attr_info = self._get_filter_attr_info(entry)
if 'type' in filter_attr_info:
entry['type'] = filter_attr_info['type']
if 'memberof' in filter_attr_info:
entry['memberof'] = filter_attr_info['memberof']
if 'implicit_targetfilters' in filter_attr_info:
extratargetfilter = sorted(
set(ipapermtargetfilter) -
filter_attr_info['implicit_targetfilters'])
if extratargetfilter:
entry['extratargetfilter'] = extratargetfilter
# old output names
if old_client:
for old_name, new_name in _DEPRECATED_OPTION_ALIASES.items():
if new_name in entry:
entry[old_name] = entry[new_name]
del entry[new_name]
rights = entry.get('attributelevelrights')
if rights:
if 'ipapermtarget' in rights:
rights['targetgroup'] = rights['ipapermtarget']
if 'ipapermtargetfilter' in rights:
rights['memberof'] = rights['ipapermtargetfilter']
type_rights = set(rights['ipapermtargetfilter'])
location_rights = set(rights.get('ipapermlocation', ''))
type_rights.intersection_update(location_rights)
rights['type'] = ''.join(sorted(
type_rights, key=rights['ipapermtargetfilter'].index))
if 'ipapermincludedattr' in rights:
rights['attrs'] = ''.join(sorted(
set(rights['ipapermincludedattr']) &
set(rights.get('ipapermexcludedattr', '')),
key=rights['ipapermincludedattr'].index))
if old_client:
for old_name, new_name in _DEPRECATED_OPTION_ALIASES.items():
if new_name in entry:
rights[old_name] = rights[new_name]
del rights[new_name]
if options.get('raw'):
# Retreive the ACI from LDAP to ensure we get the real thing
try:
_acientry, acistring = self._get_aci_entry_and_string(entry)
except errors.NotFound:
if list(entry.get('ipapermissiontype')) == ['SYSTEM']:
# SYSTEM permissions don't have normal ACIs
pass
else:
raise
else:
entry.single_value['aci'] = acistring
else:
effective_attrs = self.get_effective_attrs(entry)
if effective_attrs:
entry['attrs'] = effective_attrs
if (not options.get('all') and
not entry.get('ipapermexcludedattr') and
not entry.get('ipapermdefaultattr')):
entry.pop('ipapermincludedattr', None)
if old_client:
# Legacy clients expect some attributes as a single value
for attr in 'type', 'targetgroup', 'aci':
if attr in entry:
entry[attr] = entry.single_value[attr]
# memberof was also single-valued, but not any more
if entry.get('memberof'):
joined_value = u', '.join(str(m) for m in entry['memberof'])
entry['memberof'] = joined_value
if 'subtree' in entry:
# Legacy clients expect subtree as a URL
dn = entry.single_value['subtree']
entry['subtree'] = u'ldap:///%s' % dn
if 'filter' in entry:
# Legacy clients expect filter without parentheses
new_filter = []
for flt in entry['filter']:
assert flt[0] == '(' and flt[-1] == ')'
new_filter.append(flt[1:-1])
entry['filter'] = new_filter
if not options['raw'] and not options['all']:
# Don't return the raw target filter by default
entry.pop('ipapermtargetfilter', None)
def get_effective_attrs(self, entry):
attrs = set(entry.get('ipapermdefaultattr', ()))
attrs.update(entry.get('ipapermincludedattr', ()))
if ('read' in entry.get('ipapermright', ()) and
'objectclass' in (x.lower() for x in attrs)):
# Add special-cased operational attributes
# We want to allow reading these whenever reading the objectclass
# is allowed.
# (But they can still be excluded explicitly, at least in managed
# permissions).
attrs.update((u'entryusn', u'createtimestamp', u'modifytimestamp'))
attrs.difference_update(entry.get('ipapermexcludedattr', ()))
return sorted(attrs)
def make_aci(self, entry):
"""Make an ACI string from the given permission entry"""
aci_parts = []
name = entry.single_value['cn']
# targetattr
attrs = self.get_effective_attrs(entry)
if attrs:
aci_parts.append("(targetattr = \"%s\")" % ' || '.join(attrs))
# target
ipapermtarget = entry.single_value.get('ipapermtarget')
if ipapermtarget:
aci_parts.append("(target = \"%s\")" %
'ldap:///%s' % ipapermtarget)
# target_to
ipapermtargetto = entry.single_value.get('ipapermtargetto')
if ipapermtargetto:
aci_parts.append("(target_to = \"%s\")" %
'ldap:///%s' % ipapermtargetto)
# target_from
ipapermtargetfrom = entry.single_value.get('ipapermtargetfrom')
if ipapermtargetfrom:
aci_parts.append("(target_from = \"%s\")" %
'ldap:///%s' % ipapermtargetfrom)
# targetfilter
ipapermtargetfilter = entry.get('ipapermtargetfilter')
if ipapermtargetfilter:
assert all(f.startswith('(') and f.endswith(')')
for f in ipapermtargetfilter)
if len(ipapermtargetfilter) == 1:
filter = ipapermtargetfilter[0]
else:
filter = '(&%s)' % ''.join(sorted(ipapermtargetfilter))
aci_parts.append("(targetfilter = \"%s\")" % filter)
# version, name, rights, bind rule
ipapermbindruletype = entry.single_value.get('ipapermbindruletype',
'permission')
if ipapermbindruletype == 'permission':
dn = DN(('cn', name), self.container_dn, self.api.env.basedn)
bindrule = 'groupdn = "ldap:///%s"' % dn
elif ipapermbindruletype == 'all':
bindrule = 'userdn = "ldap:///all"'
elif ipapermbindruletype == 'anonymous':
bindrule = 'userdn = "ldap:///anyone"'
else:
raise ValueError(ipapermbindruletype)
aci_parts.append('(version 3.0;acl "permission:%s";allow (%s) %s;)' % (
name, ','.join(sorted(entry['ipapermright'])), bindrule))
return ''.join(aci_parts)
def add_aci(self, permission_entry):
"""Add the ACI coresponding to the given permission entry"""
ldap = self.api.Backend.ldap2
acistring = self.make_aci(permission_entry)
location = permission_entry.single_value.get('ipapermlocation',
self.api.env.basedn)
logger.debug('Adding ACI %r to %s', acistring, location)
try:
entry = ldap.get_entry(location, ['aci'])
except errors.NotFound:
raise errors.NotFound(reason=_('Entry %s not found') % location)
entry.setdefault('aci', []).append(acistring)
ldap.update_entry(entry)
def remove_aci(self, permission_entry):
"""Remove the ACI corresponding to the given permission entry
:return: tuple:
- entry
- removed ACI string, or None if none existed previously
"""
return self._replace_aci(permission_entry)
def update_aci(self, permission_entry, old_name=None):
"""Update the ACI corresponding to the given permission entry
:return: tuple:
- entry
- removed ACI string, or None if none existed previously
"""
new_acistring = self.make_aci(permission_entry)
return self._replace_aci(permission_entry, old_name, new_acistring)
def _replace_aci(self, permission_entry, old_name=None, new_acistring=None):
"""Replace ACI corresponding to permission_entry
:param old_name: the old name of the permission, if different from new
:param new_acistring: new ACI string; if None the ACI is just deleted
:return: tuple:
- entry
- removed ACI string, or None if none existed previously
"""
ldap = self.api.Backend.ldap2
acientry, acistring = self._get_aci_entry_and_string(
permission_entry, old_name, notfound_ok=True)
# (pylint thinks `acientry` is just a dict, but it's an LDAPEntry)
acidn = acientry.dn # pylint: disable=E1103
if acistring is not None:
logger.debug('Removing ACI %r from %s', acistring, acidn)
acientry['aci'].remove(acistring)
if new_acistring:
logger.debug('Adding ACI %r to %s', new_acistring, acidn)
acientry.setdefault('aci', []).append(new_acistring)
try:
ldap.update_entry(acientry)
except errors.EmptyModlist:
logger.debug('No changes to ACI')
return acientry, acistring
def _get_aci_entry_and_string(self, permission_entry, name=None,
notfound_ok=False, cached_acientry=None):
"""Get the entry and ACI corresponding to the permission entry
:param name: The name of the permission, or None for the cn
:param notfound_ok:
If true, (acientry, None) will be returned on missing ACI, rather
than raising exception
:param cached_acientry: See upgrade_permission()
"""
ldap = self.api.Backend.ldap2
if name is None:
name = permission_entry.single_value['cn']
location = permission_entry.single_value.get('ipapermlocation',
self.api.env.basedn)
wanted_aciname = 'permission:%s' % name
if (cached_acientry and
cached_acientry.dn == location and
'aci' in cached_acientry):
acientry = cached_acientry
else:
try:
acientry = ldap.get_entry(location, ['aci'])
except errors.NotFound:
acientry = ldap.make_entry(location)
acis = acientry.get('aci', ())
for acistring in acis:
try:
aci = ACI(acistring)
except SyntaxError as e:
logger.warning('Unparseable ACI %s: %s (at %s)',
acistring, e, location)
continue
if aci.name == wanted_aciname:
return acientry, acistring
if notfound_ok:
return acientry, None
raise errors.NotFound(
reason=_('The ACI for permission %(name)s was not found '
'in %(dn)s ') % {'name': name, 'dn': location})
def upgrade_permission(self, entry, target_entry=None,
output_only=False, cached_acientry=None):
"""Upgrade the given permission entry to V2, in-place
The entry is only upgraded if it is a plain old-style permission,
that is, it has no flags set.
:param target_entry:
If given, ``target_entry`` is filled from information taken
from the ACI corresponding to ``entry``.
If None, ``entry`` itself is filled
:param output_only:
If true, the flags & objectclass are not updated to V2.
Used for the -find and -show commands.
:param cached_acientry:
Optional pre-retreived entry that contains the existing ACI.
If it is None or its DN does not match the location DN,
cached_acientry is ignored and the entry is retreived from LDAP.
"""
if entry.get('ipapermissiontype'):
# Only convert old-style, non-SYSTEM permissions -- i.e. no flags
return
base, acistring = self._get_aci_entry_and_string(
entry, cached_acientry=cached_acientry)
if not target_entry:
target_entry = entry
# The DN of old permissions is always basedn
# (pylint thinks `base` is just a dict, but it's an LDAPEntry)
assert base.dn == self.api.env.basedn, base # pylint: disable=E1103
aci = ACI(acistring)
if 'target' in aci.target:
target_entry.single_value['ipapermtarget'] = DN(strip_ldap_prefix(
aci.target['target']['expression']))
if 'targetfilter' in aci.target:
target_entry.single_value['ipapermtargetfilter'] = unicode(
aci.target['targetfilter']['expression'])
if aci.bindrule['expression'] == 'ldap:///all':
target_entry.single_value['ipapermbindruletype'] = u'all'
elif aci.bindrule['expression'] == 'ldap:///anyone':
target_entry.single_value['ipapermbindruletype'] = u'anonymous'
else:
target_entry.single_value['ipapermbindruletype'] = u'permission'
target_entry['ipapermright'] = aci.permissions
if 'targetattr' in aci.target:
target_entry['ipapermincludedattr'] = [
unicode(a) for a in aci.target['targetattr']['expression']]
if not output_only:
target_entry['ipapermissiontype'] = ['SYSTEM', 'V2']
if 'ipapermissionv2' not in entry['objectclass']:
target_entry['objectclass'] = list(entry['objectclass']) + [
u'ipapermissionv2']
target_entry['ipapermlocation'] = [self.api.env.basedn]
# Make sure we're not losing *any info* by the upgrade
new_acistring = self.make_aci(target_entry)
if not ACI(new_acistring).isequal(aci):
raise ValueError('Cannot convert ACI, %r != %r' % (new_acistring,
acistring))
def make_type_filter(self, obj):
"""Make a filter for a --type based permission from an Object"""
objectclasses = getattr(obj, 'permission_filter_objectclasses', None)
if not objectclasses:
return None
filters = [u'(objectclass=%s)' % o for o in objectclasses]
if len(filters) == 1:
return filters[0]
else:
return '(|%s)' % ''.join(sorted(filters))
def preprocess_options(self, options,
return_filter_ops=False,
merge_targetfilter=False):
"""Preprocess options (in-place)
:param options: A dictionary of options
:param return_filter_ops:
If false, assumes there is no pre-existing entry;
additional values of ipapermtargetfilter are added to options.
If true, a dictionary of operations on ipapermtargetfilter is
returned.
These operations must be performed after the existing entry
is retrieved.
The dict has the following keys:
- remove: list of regular expression objects;
implicit values that match any of them should be removed
- add: list of values to be added, after any removals
:merge_targetfilter:
If true, the extratargetfilter is copied into ipapermtargetfilter.
"""
if 'extratargetfilter' in options:
if 'ipapermtargetfilter' in options:
raise errors.ValidationError(
name='ipapermtargetfilter',
error=_('cannot specify full target filter '
'and extra target filter simultaneously'))
if merge_targetfilter:
options['ipapermtargetfilter'] = options['extratargetfilter']
filter_ops = {'add': [], 'remove': []}
if options.get('subtree'):
if isinstance(options['subtree'], (list, tuple)):
[options['subtree']] = options['subtree']
try:
options['subtree'] = strip_ldap_prefix(options['subtree'])
except ValueError:
raise errors.ValidationError(
name='subtree',
error='does not start with "ldap:///"')
# Handle old options
for old_name, new_name in _DEPRECATED_OPTION_ALIASES.items():
if old_name in options:
if client_has_capability(options['version'], 'permissions2'):
raise errors.ValidationError(
name=old_name,
error=_('option was renamed; use %s') % new_name)
if new_name in options:
raise errors.ValidationError(
name=old_name,
error=(_('Cannot use %(old_name)s with %(new_name)s') %
{'old_name': old_name, 'new_name': new_name}))
options[new_name] = options[old_name]
del options[old_name]
# memberof
if 'memberof' in options:
filter_ops['remove'].append(re.compile(r'\(memberOf=.*\)', re.I))
memberof = options.pop('memberof')
for group in (memberof or ()):
try:
groupdn = self.api.Object.group.get_dn_if_exists(group)
except errors.NotFound:
raise errors.NotFound(
reason=_('%s: group not found') % group)
filter_ops['add'].append(u'(memberOf=%s)' % groupdn)
# targetgroup
if 'targetgroup' in options:
targetgroup = options.pop('targetgroup')
if targetgroup:
if 'ipapermtarget' in options:
raise errors.ValidationError(
name='ipapermtarget',
error=_('target and targetgroup are mutually exclusive'))
try:
groupdn = self.api.Object.group.get_dn_if_exists(targetgroup)
except errors.NotFound:
raise errors.NotFound(
reason=_('%s: group not found') % targetgroup)
options['ipapermtarget'] = groupdn
else:
if 'ipapermtarget' not in options:
options['ipapermtarget'] = None
# type
if 'type' in options:
objtype = options.pop('type')
filter_ops['remove'].append(re.compile(r'\(objectclass=.*\)', re.I))
filter_ops['remove'].append(re.compile(
r'\(\|(\(objectclass=[^(]*\))+\)', re.I))
if objtype:
if 'ipapermlocation' in options:
raise errors.ValidationError(
name='ipapermlocation',
error=_('subtree and type are mutually exclusive'))
obj = self.api.Object[objtype.lower()]
filt = self.make_type_filter(obj)
if not filt:
raise errors.ValidationError(
_('"%s" is not a valid permission type') % objtype)
filter_ops['add'].append(filt)
container_dn = DN(obj.container_dn, self.api.env.basedn)
options['ipapermlocation'] = container_dn
else:
if 'ipapermlocation' not in options:
options['ipapermlocation'] = None
if return_filter_ops:
return filter_ops
elif filter_ops['add']:
options['ipapermtargetfilter'] = list(options.get(
'ipapermtargetfilter') or []) + filter_ops['add']
def validate_permission(self, entry):
ldap = self.Backend.ldap2
# Rough filter validation by a search
if entry.get('ipapermtargetfilter'):
try:
ldap.find_entries(
filter=ldap.combine_filters(entry['ipapermtargetfilter'],
rules='&'),
base_dn=self.env.basedn,
scope=ldap.SCOPE_BASE,
size_limit=1)
except errors.NotFound:
pass
except errors.BadSearchFilter:
raise errors.ValidationError(
name='ipapermtargetfilter',
error=_('Bad search filter'))
# Ensure location exists
if entry.get('ipapermlocation'):
location = DN(entry.single_value['ipapermlocation'])
try:
ldap.get_entry(location, attrs_list=[])
except errors.NotFound:
raise errors.ValidationError(
name='ipapermlocation',
error=_('Entry %s does not exist') % location)
# Ensure there's something in the ACI's filter
needed_attrs = (
'ipapermtarget', 'ipapermtargetfilter',
'ipapermincludedattr', 'ipapermexcludedattr', 'ipapermdefaultattr')
if not any(v for a in needed_attrs for v in (entry.get(a) or ())):
raise errors.ValidationError(
name='target',
error=_('there must be at least one target entry specifier '
'(e.g. target, targetfilter, attrs)'))
# Ensure there's a right
if not entry.get('ipapermright'):
raise errors.RequirementError(name='ipapermright')
@register()
class permission_add_noaci(baseldap.LDAPCreate):
__doc__ = _('Add a system permission without an ACI (internal command)')
msg_summary = _('Added permission "%(value)s"')
NO_CLI = True
takes_options = (
_ipapermissiontype_param,
)
def get_options(self):
perm_options = set(o.name for o in self.obj.takes_params)
for option in super(permission_add_noaci, self).get_options():
# From new options, only cn & ipapermissiontype are supported
if option.name in ['ipapermissiontype']:
yield option.clone()
# Other options such as raw, version are supported
elif option.name not in perm_options:
yield option.clone()
def pre_callback(self, ldap, dn, entry, attrs_list, *keys, **options):
entry['ipapermissiontype'] = list(options['ipapermissiontype'])
entry['objectclass'] = [oc for oc in entry['objectclass']
if oc.lower() != 'ipapermissionv2']
return dn
@register()
class permission_add(baseldap.LDAPCreate):
__doc__ = _('Add a new permission.')
msg_summary = _('Added permission "%(value)s"')
# Need to override execute so that processed options apply to
# the whole command, not just the callbacks
def execute(self, *keys, **options):
self.obj.preprocess_options(options, merge_targetfilter=True)
return super(permission_add, self).execute(*keys, **options)
def get_args(self):
for arg in super(permission_add, self).get_args():
if arg.name == 'cn':
yield _disallow_colon(arg)
else:
yield arg
def pre_callback(self, ldap, dn, entry, attrs_list, *keys, **options):
entry['ipapermissiontype'] = ['SYSTEM', 'V2']
entry['cn'] = list(keys)
if not entry.get('ipapermlocation'):
entry.setdefault('ipapermlocation', [api.env.basedn])
if 'attrs' in options:
if 'ipapermincludedattr' in options:
raise errors.ValidationError(
name='attrs',
error=_('attrs and included attributes are '
'mutually exclusive'))
entry['ipapermincludedattr'] = list(options.pop('attrs') or ())
self.obj.validate_permission(entry)
return dn
def post_callback(self, ldap, dn, entry, *keys, **options):
try:
self.obj.add_aci(entry)
except Exception as e:
# Adding the ACI failed.
# We want to be 100% sure the ACI is not there, so try to
# remove it. (This is a no-op if the ACI was not added.)
self.obj.remove_aci(entry)
# Remove the entry.
# The permission entry serves as a "lock" tho prevent
# permission-add commands started at the same time from
# interfering. As long as the entry is there, the other
# permission-add will fail with DuplicateEntry.
# So deleting entry ("releasing the lock") must be the last
# thing we do here.
try:
self.api.Backend['ldap2'].delete_entry(entry)
except errors.NotFound:
pass
if isinstance(e, errors.NotFound):
# add_aci may raise NotFound if the subtree is only virtual
# like cn=compat,SUFFIX and thus passes the LDAP get entry test
location = DN(entry.single_value['ipapermlocation'])
raise errors.ValidationError(
name='ipapermlocation',
error=_('Cannot store permission ACI to %s') % location)
# Re-raise original exception
raise
self.obj.postprocess_result(entry, options)
return dn
@register()
class permission_del(baseldap.LDAPDelete):
__doc__ = _('Delete a permission.')
msg_summary = _('Deleted permission "%(value)s"')
takes_options = baseldap.LDAPDelete.takes_options + (
Flag('force',
label=_('Force'),
flags={'no_option', 'no_output'},
doc=_('force delete of SYSTEM permissions'),
),
)
def pre_callback(self, ldap, dn, *keys, **options):
try:
entry = ldap.get_entry(dn, attrs_list=self.obj.default_attributes)
except errors.NotFound:
raise self.obj.handle_not_found(*keys)
if not options.get('force'):
self.obj.reject_system(entry)
if entry.get('ipapermdefaultattr'):
raise errors.ACIError(
info=_('cannot delete managed permissions'))
try:
self.obj.remove_aci(entry)
except errors.NotFound:
raise errors.NotFound(
reason=_('ACI of permission %s was not found') % keys[0])
return dn
@register()
class permission_mod(baseldap.LDAPUpdate):
__doc__ = _('Modify a permission.')
msg_summary = _('Modified permission "%(value)s"')
def execute(self, *keys, **options):
context.filter_ops = self.obj.preprocess_options(
options, return_filter_ops=True)
return super(permission_mod, self).execute(*keys, **options)
def get_options(self):
for opt in super(permission_mod, self).get_options():
if opt.name == 'rename':
yield _disallow_colon(opt)
else:
yield opt
def pre_callback(self, ldap, dn, entry, attrs_list, *keys, **options):
if 'rename' in options and not options['rename']:
raise errors.ValidationError(name='rename',
error='New name can not be empty')
try:
attrs_list = self.obj.default_attributes
old_entry = ldap.get_entry(dn, attrs_list=attrs_list)
except errors.NotFound:
raise self.obj.handle_not_found(*keys)
self.obj.reject_system(old_entry)
self.obj.upgrade_permission(old_entry)
if 'MANAGED' in old_entry.get('ipapermissiontype', ()):
for option_name in sorted(options):
if option_name == 'rename':
raise errors.ValidationError(
name=option_name,
error=_('cannot rename managed permissions'))
option = self.options[option_name]
allow_mod = 'allow_mod_for_managed_permission' in option.flags
if (option.attribute and not allow_mod or
option_name == 'extratargetfilter'):
raise errors.ValidationError(
name=option_name,
error=_('not modifiable on managed permissions'))
if context.filter_ops.get('add'):
raise errors.ValidationError(
name='ipapermtargetfilter',
error=_('not modifiable on managed permissions'))
else:
if options.get('ipapermexcludedattr'):
# prevent setting excluded attributes on normal permissions
# (but do allow deleting them all)
raise errors.ValidationError(
name='ipapermexcludedattr',
error=_('only available on managed permissions'))
if 'attrs' in options:
if any(a in options for a in ('ipapermincludedattr',
'ipapermexcludedattr')):
raise errors.ValidationError(
name='attrs',
error=_('attrs and included/excluded attributes are '
'mutually exclusive'))
attrs = set(options.pop('attrs') or ())
defaults = set(old_entry.get('ipapermdefaultattr', ()))
entry['ipapermincludedattr'] = list(attrs - defaults)
entry['ipapermexcludedattr'] = list(defaults - attrs)
# Check setting bindtype for an assigned permission
if options.get('ipapermbindruletype') and old_entry.get('member'):
raise errors.ValidationError(
name='ipapermbindruletype',
error=_('cannot set bindtype for a permission that is '
'assigned to a privilege'))
# Since `entry` only contains the attributes we are currently changing,
# it cannot be used directly to generate an ACI.
# First we need to copy the original data into it.
for key, value in old_entry.items():
if (key not in options and
key != 'cn' and
key not in self.obj.attribute_members):
entry.setdefault(key, value)
# For extratargetfilter, add it to the implicit filters
# to get the full target filter
if 'extratargetfilter' in options:
filter_attr_info = self.obj._get_filter_attr_info(entry)
entry['ipapermtargetfilter'] = (
list(options['extratargetfilter'] or []) +
list(filter_attr_info['implicit_targetfilters']))
filter_ops = context.filter_ops
old_filter_attr_info = self.obj._get_filter_attr_info(old_entry)
old_implicit_filters = old_filter_attr_info['implicit_targetfilters']
removes = filter_ops.get('remove', [])
new_filters = set(
filt for filt in (entry.get('ipapermtargetfilter') or [])
if filt not in old_implicit_filters or
not any(rem.match(filt) for rem in removes))
new_filters.update(filter_ops.get('add', []))
new_filters.update(options.get('ipapermtargetfilter') or [])
entry['ipapermtargetfilter'] = list(new_filters)
if not entry.get('ipapermlocation'):
entry['ipapermlocation'] = [self.api.env.basedn]
self.obj.validate_permission(entry)
old_location = old_entry.single_value.get('ipapermlocation',
self.api.env.basedn)
if old_location == options.get('ipapermlocation', old_location):
context.permision_moving_aci = False
else:
context.permision_moving_aci = True
try:
context.old_aci_info = self.obj.remove_aci(old_entry)
except errors.NotFound as e:
logger.error('permission ACI not found: %s', e)
# To pass data to postcallback, we currently need to use the context
context.old_entry = old_entry
return dn
def exc_callback(self, keys, options, exc, call_func, *call_args, **call_kwargs):
if call_func.__name__ == 'update_entry':
self._revert_aci()
raise exc
def _revert_aci(self):
old_aci_info = getattr(context, 'old_aci_info', None)
if old_aci_info:
# Try to roll back the old ACI
entry, old_aci_string = old_aci_info
if old_aci_string:
logger.warning('Reverting ACI on %s to %s', entry.dn,
old_aci_string)
entry['aci'].append(old_aci_string)
self.Backend.ldap2.update_entry(entry)
def post_callback(self, ldap, dn, entry, *keys, **options):
old_entry = context.old_entry
try:
if context.permision_moving_aci:
self.obj.add_aci(entry)
else:
self.obj.update_aci(entry, old_entry.single_value['cn'])
except Exception:
# Don't revert attribute which doesn't exist in LDAP
entry.pop('attributelevelrights', None)
logger.error('Error updating ACI: %s', traceback.format_exc())
logger.warning('Reverting entry')
old_entry.reset_modlist(entry)
ldap.update_entry(old_entry)
self._revert_aci()
raise
self.obj.postprocess_result(entry, options)
entry['dn'] = entry.dn
return dn
@register()
class permission_find(baseldap.LDAPSearch):
__doc__ = _('Search for permissions.')
msg_summary = ngettext(
'%(count)d permission matched', '%(count)d permissions matched', 0)
def execute(self, *keys, **options):
self.obj.preprocess_options(options, merge_targetfilter=True)
return super(permission_find, self).execute(*keys, **options)
def pre_callback(self, ldap, filters, attrs_list, base_dn, scope,
*args, **options):
if 'attrs' in options and 'ipapermincludedattr' in options:
raise errors.ValidationError(
name='attrs',
error=_('attrs and included/excluded attributes are '
'mutually exclusive'))
if options.get('attrs'):
# Effective attributes:
# each attr must be in either default or included,
# but not in excluded
filters = ldap.combine_filters(
[filters] + [
'(&'
'(|'
'(ipapermdefaultattr=%(attr)s)'
'(ipapermincludedattr=%(attr)s))'
'(!(ipapermexcludedattr=%(attr)s)))' % {'attr': attr}
for attr in options['attrs']
],
ldap.MATCH_ALL,
)
return filters, base_dn, scope
def post_callback(self, ldap, entries, truncated, *args, **options):
if 'attrs' in options:
options['ipapermincludedattr'] = options['attrs']
attribute_options = [o for o in options
if (o in self.options and
self.options[o].attribute)]
if not options.get('pkey_only'):
for entry in entries:
# Old-style permissions might have matched (e.g. by name)
self.obj.upgrade_permission(entry, output_only=True)
if not truncated:
if 'sizelimit' in options:
max_entries = options['sizelimit']
else:
max_entries = self.api.Backend.ldap2.size_limit
if max_entries > 0:
# should we get more entries than current sizelimit, fail
assert len(entries) <= max_entries
filters = ['(objectclass=ipaPermission)',
'(!(ipaPermissionType=V2))']
if 'name' in options:
filters.append(ldap.make_filter_from_attr('cn',
options['name'],
exact=False))
index = tuple(self.args).index('criteria')
try:
term = args[index]
filters.append(self.get_term_filter(ldap, term))
except IndexError:
term = None
attrs_list = list(self.obj.default_attributes)
attrs_list += list(self.obj.attribute_members)
if options.get('all'):
attrs_list.append('*')
try:
legacy_entries, truncated = ldap.find_entries(
base_dn=DN(self.obj.container_dn, self.api.env.basedn),
filter=ldap.combine_filters(filters, rules=ldap.MATCH_ALL),
attrs_list=attrs_list, size_limit=max_entries)
# Retrieve the root entry (with all legacy ACIs) at once
root_entry = ldap.get_entry(DN(api.env.basedn), ['aci'])
except errors.NotFound:
legacy_entries = ()
logger.debug('potential legacy entries: %s', len(legacy_entries))
nonlegacy_names = {e.single_value['cn'] for e in entries}
for entry in legacy_entries:
if entry.single_value['cn'] in nonlegacy_names:
continue
self.obj.upgrade_permission(entry, output_only=True,
cached_acientry=root_entry)
# If all given options match, include the entry
# Do a case-insensitive match, on any value if multi-valued
for opt in attribute_options:
optval = options[opt]
if not isinstance(optval, (tuple, list)):
optval = [optval]
value = entry.get(opt)
if not value:
break
if not all(any(str(ov).lower() in str(v).lower()
for v in value) for ov in optval):
break
else:
# Each search term must be present in some
# attribute value
for arg in args:
if arg:
arg = arg.lower()
if not any(arg in str(value).lower()
for values in entry.values()
for value in values):
break
else:
if max_entries > 0 and len(entries) == max_entries:
# We've reached the limit, set truncated flag
# (max_entries <= 0 means unlimited)
truncated = True
break
entries.append(entry)
for entry in entries:
if options.get('pkey_only'):
for opt_name in list(entry):
if opt_name != self.obj.primary_key.name:
del entry[opt_name]
else:
self.obj.postprocess_result(entry, options)
return truncated
@register()
class permission_show(baseldap.LDAPRetrieve):
__doc__ = _('Display information about a permission.')
def post_callback(self, ldap, dn, entry, *keys, **options):
self.obj.upgrade_permission(entry, output_only=True)
self.obj.postprocess_result(entry, options)
return dn
@register()
class permission_add_member(baseldap.LDAPAddMember):
"""Add members to a permission."""
NO_CLI = True
def pre_callback(self, ldap, dn, member_dns, failed, *keys, **options):
# We can only add permissions with bind rule type set to
# "permission" (or old-style permissions)
validate_permission_to_privilege(self.api, keys[-1])
return dn
@register()
class permission_remove_member(baseldap.LDAPRemoveMember):
"""Remove members from a permission."""
NO_CLI = True
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