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freeipa/ipaserver/plugins/cert.py
Christian Heimes 61156b0a50 Py3: Replace six.text_type with str 
On Python 3, six.text_type (singular) is an alias for str.

See: https://pagure.io/freeipa/issue/7715
Signed-off-by: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>
2018-09-27 16:11:18 +02:00

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# Authors:
# Andrew Wnuk <awnuk@redhat.com>
# Jason Gerard DeRose <jderose@redhat.com>
# John Dennis <jdennis@redhat.com>
#
# Copyright (C) 2009 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 base64
import collections
import datetime
import logging
from operator import attrgetter
import cryptography.x509
from cryptography.hazmat.primitives import hashes, serialization
import six
from ipalib import Command, Str, Int, Flag
from ipalib import api
from ipalib import errors, messages
from ipalib import x509
from ipalib import ngettext
from ipalib.constants import IPA_CA_CN
from ipalib.crud import Create, PKQuery, Retrieve, Search
from ipalib.frontend import Method, Object
from ipalib.parameters import (
Bytes, Certificate, CertificateSigningRequest, DateTime, DNParam,
DNSNameParam, Principal
)
from ipalib.plugable import Registry
from .virtual import VirtualCommand
from .baseldap import pkey_to_value
from .certprofile import validate_profile_id
from ipalib.text import _
from ipalib.request import context
from ipalib import output
from ipapython import kerberos
from ipapython.dn import DN
from ipaserver.plugins.service import normalize_principal, validate_realm
try:
import pyhbac
except ImportError:
raise errors.SkipPluginModule(reason=_('pyhbac is not installed.'))
if six.PY3:
unicode = str
__doc__ = _("""
IPA certificate operations
""") + _("""
Implements a set of commands for managing server SSL certificates.
""") + _("""
Certificate requests exist in the form of a Certificate Signing Request (CSR)
in PEM format.
""") + _("""
The dogtag CA uses just the CN value of the CSR and forces the rest of the
subject to values configured in the server.
""") + _("""
A certificate is stored with a service principal and a service principal
needs a host.
""") + _("""
In order to request a certificate:
""") + _("""
* The host must exist
* The service must exist (or you use the --add option to automatically add it)
""") + _("""
SEARCHING:
""") + _("""
Certificates may be searched on by certificate subject, serial number,
revocation reason, validity dates and the issued date.
""") + _("""
When searching on dates the _from date does a >= search and the _to date
does a <= search. When combined these are done as an AND.
""") + _("""
Dates are treated as GMT to match the dates in the certificates.
""") + _("""
The date format is YYYY-mm-dd.
""") + _("""
EXAMPLES:
""") + _("""
Request a new certificate and add the principal:
ipa cert-request --add --principal=HTTP/lion.example.com example.csr
""") + _("""
Retrieve an existing certificate:
ipa cert-show 1032
""") + _("""
Revoke a certificate (see RFC 5280 for reason details):
ipa cert-revoke --revocation-reason=6 1032
""") + _("""
Remove a certificate from revocation hold status:
ipa cert-remove-hold 1032
""") + _("""
Check the status of a signing request:
ipa cert-status 10
""") + _("""
Search for certificates by hostname:
ipa cert-find --subject=ipaserver.example.com
""") + _("""
Search for revoked certificates by reason:
ipa cert-find --revocation-reason=5
""") + _("""
Search for certificates based on issuance date
ipa cert-find --issuedon-from=2013-02-01 --issuedon-to=2013-02-07
""") + _("""
Search for certificates owned by a specific user:
ipa cert-find --user=user
""") + _("""
Examine a certificate:
ipa cert-find --file=cert.pem --all
""") + _("""
Verify that a certificate is owned by a specific user:
ipa cert-find --file=cert.pem --user=user
""") + _("""
IPA currently immediately issues (or declines) all certificate requests so
the status of a request is not normally useful. This is for future use
or the case where a CA does not immediately issue a certificate.
""") + _("""
The following revocation reasons are supported:
""") + _(""" * 0 - unspecified
""") + _(""" * 1 - keyCompromise
""") + _(""" * 2 - cACompromise
""") + _(""" * 3 - affiliationChanged
""") + _(""" * 4 - superseded
""") + _(""" * 5 - cessationOfOperation
""") + _(""" * 6 - certificateHold
""") + _(""" * 8 - removeFromCRL
""") + _(""" * 9 - privilegeWithdrawn
""") + _(""" * 10 - aACompromise
""") + _("""
Note that reason code 7 is not used. See RFC 5280 for more details:
""") + _("""
http://www.ietf.org/rfc/rfc5280.txt
""")
logger = logging.getLogger(__name__)
USER, HOST, KRBTGT, SERVICE = range(4)
register = Registry()
PKIDATE_FORMAT = '%Y-%m-%d'
def _acl_make_request(principal_type, principal, ca_id, profile_id):
"""Construct HBAC request for the given principal, CA and profile"""
req = pyhbac.HbacRequest()
req.targethost.name = ca_id
req.service.name = profile_id
if principal_type == 'user':
req.user.name = principal.username
elif principal_type == 'host':
req.user.name = principal.hostname
elif principal_type == 'service':
req.user.name = unicode(principal)
groups = []
if principal_type == 'user':
user_obj = api.Command.user_show(
str(principal.username))['result']
groups = user_obj.get('memberof_group', [])
groups += user_obj.get('memberofindirect_group', [])
elif principal_type == 'host':
host_obj = api.Command.host_show(
str(principal.hostname))['result']
groups = host_obj.get('memberof_hostgroup', [])
groups += host_obj.get('memberofindirect_hostgroup', [])
req.user.groups = sorted(set(groups))
return req
def _acl_make_rule(principal_type, obj):
"""Turn CA ACL object into HBAC rule.
``principal_type``
String in {'user', 'host', 'service'}
"""
rule = pyhbac.HbacRule(obj['cn'][0])
rule.enabled = obj['ipaenabledflag'][0]
rule.srchosts.category = {pyhbac.HBAC_CATEGORY_ALL}
# add CA(s)
if 'ipacacategory' in obj and obj['ipacacategory'][0].lower() == 'all':
rule.targethosts.category = {pyhbac.HBAC_CATEGORY_ALL}
else:
# For compatibility with pre-lightweight-CAs CA ACLs,
# no CA members implies the host authority (only)
rule.targethosts.names = obj.get('ipamemberca_ca', [IPA_CA_CN])
# add profiles
if ('ipacertprofilecategory' in obj
and obj['ipacertprofilecategory'][0].lower() == 'all'):
rule.services.category = {pyhbac.HBAC_CATEGORY_ALL}
else:
attr = 'ipamembercertprofile_certprofile'
rule.services.names = obj.get(attr, [])
# add principals and principal's groups
category_attr = '{}category'.format(principal_type)
if category_attr in obj and obj[category_attr][0].lower() == 'all':
rule.users.category = {pyhbac.HBAC_CATEGORY_ALL}
else:
if principal_type == 'user':
rule.users.names = obj.get('memberuser_user', [])
rule.users.groups = obj.get('memberuser_group', [])
elif principal_type == 'host':
rule.users.names = obj.get('memberhost_host', [])
rule.users.groups = obj.get('memberhost_hostgroup', [])
elif principal_type == 'service':
rule.users.names = [
unicode(principal)
for principal in obj.get('memberservice_service', [])
]
return rule
def acl_evaluate(principal, ca_id, profile_id):
if principal.is_user:
principal_type = 'user'
elif principal.is_host:
principal_type = 'host'
else:
principal_type = 'service'
req = _acl_make_request(principal_type, principal, ca_id, profile_id)
acls = api.Command.caacl_find(no_members=False)['result']
rules = [_acl_make_rule(principal_type, obj) for obj in acls]
return req.evaluate(rules) == pyhbac.HBAC_EVAL_ALLOW
def normalize_pkidate(value):
return datetime.datetime.strptime(value, PKIDATE_FORMAT)
def convert_pkidatetime(value):
value = datetime.datetime.fromtimestamp(int(value) // 1000)
return x509.format_datetime(value)
def normalize_serial_number(num):
"""
Convert a SN given in decimal or hexadecimal.
Returns the number or None if conversion fails.
"""
# plain decimal or hexa with radix prefix
try:
num = int(num, 0)
except ValueError:
try:
# hexa without prefix
num = int(num, 16)
except ValueError:
pass
return unicode(num)
def ca_enabled_check(_api):
if not _api.Command.ca_is_enabled()['result']:
raise errors.NotFound(reason=_('CA is not configured'))
def caacl_check(principal, ca, profile_id):
if not acl_evaluate(principal, ca, profile_id):
raise errors.ACIError(info=_(
"Principal '%(principal)s' "
"is not permitted to use CA '%(ca)s' "
"with profile '%(profile_id)s' for certificate issuance."
) % dict(
principal=unicode(principal),
ca=ca,
profile_id=profile_id
)
)
def ca_kdc_check(api_instance, hostname):
master_dn = api_instance.Object.server.get_dn(unicode(hostname))
kdc_dn = DN(('cn', 'KDC'), master_dn)
try:
kdc_entry = api_instance.Backend.ldap2.get_entry(
kdc_dn, ['ipaConfigString'])
ipaconfigstring = {val.lower() for val in kdc_entry['ipaConfigString']}
if 'enabledservice' not in ipaconfigstring \
and 'configuredservice' not in ipaconfigstring:
raise errors.NotFound(
reason=_("enabledService/configuredService not in "
"ipaConfigString kdc entry"))
except errors.NotFound:
raise errors.ACIError(
info=_("Host '%(hostname)s' is not an active KDC")
% dict(hostname=hostname))
def bind_principal_can_manage_cert(cert):
"""Check that the bind principal can manage the given cert.
``cert``
A python-cryptography ``Certificate`` object.
"""
bind_principal = kerberos.Principal(getattr(context, 'principal'))
if not bind_principal.is_host:
return False
hostname = bind_principal.hostname
# Verify that hostname matches subject of cert.
# We check the "most-specific" CN value.
cns = cert.subject.get_attributes_for_oid(
cryptography.x509.oid.NameOID.COMMON_NAME)
if len(cns) == 0:
return False # no CN in subject
else:
return hostname == cns[-1].value
class BaseCertObject(Object):
takes_params = (
Str(
'cacn?',
cli_name='ca',
default=IPA_CA_CN,
autofill=True,
label=_('Issuing CA'),
doc=_('Name of issuing CA'),
flags={'no_create', 'no_update', 'no_search'},
),
Certificate(
'certificate',
label=_("Certificate"),
doc=_("Base-64 encoded certificate."),
flags={'no_create', 'no_update', 'no_search'},
),
Bytes(
'certificate_chain*',
label=_("Certificate chain"),
doc=_("X.509 certificate chain"),
flags={'no_create', 'no_update', 'no_search'},
),
DNParam(
'subject',
label=_('Subject'),
flags={'no_create', 'no_update', 'no_search'},
),
Str(
'san_rfc822name*',
label=_('Subject email address'),
flags={'no_create', 'no_update', 'no_search'},
),
DNSNameParam(
'san_dnsname*',
label=_('Subject DNS name'),
flags={'no_create', 'no_update', 'no_search'},
),
Str(
'san_x400address*',
label=_('Subject X.400 address'),
flags={'no_create', 'no_update', 'no_search'},
),
DNParam(
'san_directoryname*',
label=_('Subject directory name'),
flags={'no_create', 'no_update', 'no_search'},
),
Str(
'san_edipartyname*',
label=_('Subject EDI Party name'),
flags={'no_create', 'no_update', 'no_search'},
),
Str(
'san_uri*',
label=_('Subject URI'),
flags={'no_create', 'no_update', 'no_search'},
),
Str(
'san_ipaddress*',
label=_('Subject IP Address'),
flags={'no_create', 'no_update', 'no_search'},
),
Str(
'san_oid*',
label=_('Subject OID'),
flags={'no_create', 'no_update', 'no_search'},
),
Principal(
'san_other_upn*',
label=_('Subject UPN'),
flags={'no_create', 'no_update', 'no_search'},
),
Principal(
'san_other_kpn*',
label=_('Subject Kerberos principal name'),
flags={'no_create', 'no_update', 'no_search'},
),
Str(
'san_other*',
label=_('Subject Other Name'),
flags={'no_create', 'no_update', 'no_search'},
),
DNParam(
'issuer',
label=_('Issuer'),
doc=_('Issuer DN'),
flags={'no_create', 'no_update', 'no_search'},
),
DateTime(
'valid_not_before',
label=_('Not Before'),
flags={'no_create', 'no_update', 'no_search'},
),
DateTime(
'valid_not_after',
label=_('Not After'),
flags={'no_create', 'no_update', 'no_search'},
),
Str(
'sha1_fingerprint',
label=_('Fingerprint (SHA1)'),
flags={'no_create', 'no_update', 'no_search'},
),
Str(
'sha256_fingerprint',
label=_('Fingerprint (SHA256)'),
flags={'no_create', 'no_update', 'no_search'},
),
Int(
'serial_number',
label=_('Serial number'),
doc=_('Serial number in decimal or if prefixed with 0x in hexadecimal'),
normalizer=normalize_serial_number,
flags={'no_create', 'no_update', 'no_search'},
),
Str(
'serial_number_hex',
label=_('Serial number (hex)'),
flags={'no_create', 'no_update', 'no_search'},
),
)
def _parse(self, obj, full=True):
"""Extract certificate-specific data into a result object.
``obj``
Result object containing certificate, into which extracted
data will be inserted.
``full``
Whether to include all fields, or only the ones we guess
people want to see most of the time. Also add
recognised otherNames to the generic ``san_other``
attribute when ``True`` in addition to the specialised
attribute.
Raise ``ValueError`` if the certificate is malformed.
(Note: only the main certificate structure and Subject Alt
Name extension are examined.)
"""
if 'certificate' in obj:
cert = x509.load_der_x509_certificate(
base64.b64decode(obj['certificate']))
obj['subject'] = DN(cert.subject)
obj['issuer'] = DN(cert.issuer)
obj['serial_number'] = cert.serial_number
obj['valid_not_before'] = x509.format_datetime(
cert.not_valid_before)
obj['valid_not_after'] = x509.format_datetime(
cert.not_valid_after)
if full:
obj['sha1_fingerprint'] = x509.to_hex_with_colons(
cert.fingerprint(hashes.SHA1()))
obj['sha256_fingerprint'] = x509.to_hex_with_colons(
cert.fingerprint(hashes.SHA256()))
general_names = x509.process_othernames(
cert.san_general_names)
for gn in general_names:
try:
self._add_san_attribute(obj, full, gn)
except Exception:
# Invalid GeneralName (i.e. not a valid X.509 cert);
# don't fail but log something about it
logger.warning(
"Encountered bad GeneralName; skipping", exc_info=True)
serial_number = obj.get('serial_number')
if serial_number is not None:
obj['serial_number_hex'] = u'0x%X' % serial_number
def _add_san_attribute(self, obj, full, gn):
name_type_map = {
cryptography.x509.RFC822Name:
('san_rfc822name', attrgetter('value')),
cryptography.x509.DNSName: ('san_dnsname', attrgetter('value')),
# cryptography.x509.???: 'san_x400address',
cryptography.x509.DirectoryName:
('san_directoryname', lambda x: DN(x.value)),
# cryptography.x509.???: 'san_edipartyname',
cryptography.x509.UniformResourceIdentifier:
('san_uri', attrgetter('value')),
cryptography.x509.IPAddress:
('san_ipaddress', attrgetter('value')),
cryptography.x509.RegisteredID:
('san_oid', attrgetter('value.dotted_string')),
cryptography.x509.OtherName: ('san_other', _format_othername),
x509.UPN: ('san_other_upn', attrgetter('name')),
x509.KRB5PrincipalName: ('san_other_kpn', attrgetter('name')),
}
default_attrs = {
'san_rfc822name', 'san_dnsname', 'san_other_upn', 'san_other_kpn',
}
if type(gn) not in name_type_map:
return
attr_name, format_name = name_type_map[type(gn)]
if full or attr_name in default_attrs:
attr_value = self.params[attr_name].type(format_name(gn))
obj.setdefault(attr_name, []).append(attr_value)
if full and attr_name.startswith('san_other_'):
# also include known otherName in generic otherName attribute
attr_value = self.params['san_other'].type(_format_othername(gn))
obj.setdefault('san_other', []).append(attr_value)
def _format_othername(on):
"""Format a python-cryptography OtherName for display."""
return u'{}:{}'.format(
on.type_id.dotted_string,
base64.b64encode(on.value).decode('ascii')
)
class BaseCertMethod(Method):
def get_options(self):
yield self.obj.params['cacn'].clone(query=True)
for option in super(BaseCertMethod, self).get_options():
yield option
@register()
class certreq(BaseCertObject):
takes_params = BaseCertObject.takes_params + (
Str(
'request_type',
default=u'pkcs10',
autofill=True,
flags={'no_option', 'no_update', 'no_update', 'no_search'},
),
Str(
'profile_id?', validate_profile_id,
label=_("Profile ID"),
doc=_("Certificate Profile to use"),
flags={'no_update', 'no_update', 'no_search'},
),
Str(
'cert_request_status',
label=_('Request status'),
flags={'no_create', 'no_update', 'no_search'},
),
Int(
'request_id',
label=_('Request id'),
primary_key=True,
flags={'no_create', 'no_update', 'no_search', 'no_output'},
),
)
_chain_flag = Flag(
'chain',
default=False,
doc=_('Include certificate chain in output'),
)
@register()
class cert_request(Create, BaseCertMethod, VirtualCommand):
__doc__ = _('Submit a certificate signing request.')
obj_name = 'certreq'
attr_name = 'request'
takes_args = (
CertificateSigningRequest(
'csr',
label=_('CSR'),
cli_name='csr_file',
),
)
operation="request certificate"
takes_options = (
Principal(
'principal',
validate_realm,
label=_('Principal'),
doc=_('Principal for this certificate (e.g. HTTP/test.example.com)'),
normalizer=normalize_principal
),
Flag(
'add',
doc=_(
"automatically add the principal if it doesn't exist "
"(service principals only)"),
),
_chain_flag,
)
def get_args(self):
# FIXME: the 'no_create' flag is ignored for positional arguments
for arg in super(cert_request, self).get_args():
if arg.name == 'request_id':
continue
yield arg
def execute(self, csr, all=False, raw=False, chain=False, **kw):
ca_enabled_check(self.api)
ldap = self.api.Backend.ldap2
realm = unicode(self.api.env.realm)
add = kw.get('add')
request_type = kw.get('request_type')
profile_id = kw.get('profile_id', self.Backend.ra.DEFAULT_PROFILE)
# Check that requested authority exists (done before CA ACL
# enforcement so that user gets better error message if
# referencing nonexistant CA) and look up authority ID.
#
ca = kw['cacn']
ca_obj = api.Command.ca_show(ca, all=all, chain=chain)['result']
ca_id = ca_obj['ipacaid'][0]
"""
Access control is partially handled by the ACI titled
'Hosts can modify service userCertificate'. This is for the case
where a machine binds using a host/ prinicpal. It can only do the
request if the target hostname is in the managedBy attribute which
is managed using the add/del member commands.
Binding with a user principal one needs to be in the request_certs
taskgroup (directly or indirectly via role membership).
"""
principal_arg = kw.get('principal')
if principal_to_principal_type(principal_arg) == KRBTGT:
principal_obj = None
principal = principal_arg
# Allow krbtgt to use only the KDC certprofile
if profile_id != self.Backend.ra.KDC_PROFILE:
raise errors.ACIError(
info=_("krbtgt certs can use only the %s profile") % (
self.Backend.ra.KDC_PROFILE))
# Allow only our own realm krbtgt for now; no trusted realms.
if principal != kerberos.Principal((u'krbtgt', realm),
realm=realm):
raise errors.NotFound("Not our realm's krbtgt")
else:
principal_obj = self.lookup_or_add_principal(principal_arg, add)
if 'krbcanonicalname' in principal_obj:
principal = principal_obj['krbcanonicalname'][0]
else:
principal = principal_obj['krbprincipalname'][0]
principal_string = unicode(principal)
principal_type = principal_to_principal_type(principal)
bind_principal = kerberos.Principal(getattr(context, 'principal'))
bind_principal_string = unicode(bind_principal)
bind_principal_type = principal_to_principal_type(bind_principal)
if (bind_principal_string != principal_string and
bind_principal_type != HOST):
# Can the bound principal request certs for another principal?
self.check_access()
try:
self.check_access("request certificate ignore caacl")
bypass_caacl = True
except errors.ACIError:
bypass_caacl = False
if not bypass_caacl:
if principal_type == KRBTGT:
ca_kdc_check(self.api, bind_principal.hostname)
else:
caacl_check(principal, ca, profile_id)
try:
ext_san = csr.extensions.get_extension_for_oid(
cryptography.x509.oid.ExtensionOID.SUBJECT_ALTERNATIVE_NAME)
except cryptography.x509.extensions.ExtensionNotFound:
ext_san = None
# Ensure that the DN in the CSR matches the principal
#
# We only look at the "most specific" CN value
cns = csr.subject.get_attributes_for_oid(
cryptography.x509.oid.NameOID.COMMON_NAME)
if len(cns) == 0:
raise errors.ValidationError(name='csr',
error=_("No Common Name was found in subject of request."))
cn = cns[-1].value # "most specific" is end of list
if principal_type in (SERVICE, HOST):
if not _dns_name_matches_principal(cn, principal, principal_obj):
raise errors.ValidationError(
name='csr',
error=_(
"hostname in subject of request '%(cn)s' does not "
"match name or aliases of principal '%(principal)s'"
) % dict(cn=cn, principal=principal))
elif principal_type == KRBTGT and not bypass_caacl:
if cn.lower() != bind_principal.hostname.lower():
raise errors.ACIError(
info=_("hostname in subject of request '%(cn)s' "
"does not match principal hostname "
"'%(hostname)s'") % dict(
cn=cn, hostname=bind_principal.hostname))
elif principal_type == USER:
# check user name
if cn != principal.username:
raise errors.ValidationError(
name='csr',
error=_("DN commonName does not match user's login")
)
# check email address
#
# fail if any email addr from DN does not appear in ldap entry
email_addrs = csr.subject.get_attributes_for_oid(
cryptography.x509.oid.NameOID.EMAIL_ADDRESS)
csr_emails = [attr.value for attr in email_addrs]
if not _emails_are_valid(csr_emails,
principal_obj.get('mail', [])):
raise errors.ValidationError(
name='csr',
error=_(
"DN emailAddress does not match "
"any of user's email addresses")
)
if principal_type != KRBTGT:
# We got this far so the principal entry exists, can we write it?
dn = principal_obj.dn
if not ldap.can_write(dn, "usercertificate"):
raise errors.ACIError(
info=_("Insufficient 'write' privilege to the "
"'userCertificate' attribute of entry '%s'.") % dn)
# Validate the subject alt name, if any
generalnames = []
if ext_san is not None:
generalnames = x509.process_othernames(ext_san.value)
for gn in generalnames:
if isinstance(gn, cryptography.x509.general_name.DNSName):
if principal.is_user:
raise errors.ValidationError(
name='csr',
error=_(
"subject alt name type %s is forbidden "
"for user principals") % "DNSName"
)
name = gn.value
if _dns_name_matches_principal(name, principal, principal_obj):
continue # nothing more to check for this alt name
# no match yet; check for an alternative principal with
# same realm and service type as subject principal.
components = list(principal.components)
components[-1] = name
alt_principal = kerberos.Principal(components, principal.realm)
alt_principal_obj = None
try:
if principal_type == HOST:
alt_principal_obj = api.Command['host_show'](
name, all=True)
elif principal_type == KRBTGT:
alt_principal = kerberos.Principal(
(u'host', name), principal.realm)
elif principal_type == SERVICE:
alt_principal_obj = api.Command['service_show'](
alt_principal, all=True)
except errors.NotFound:
# We don't want to issue any certificates referencing
# machines we don't know about. Nothing is stored in this
# host record related to this certificate.
raise errors.NotFound(reason=_('The service principal for '
'subject alt name %s in certificate request does not '
'exist') % name)
if alt_principal_obj is not None:
# we found an alternative principal;
# now check write access and caacl
altdn = alt_principal_obj['result']['dn']
if not ldap.can_write(altdn, "usercertificate"):
raise errors.ACIError(info=_(
"Insufficient privilege to create a certificate "
"with subject alt name '%s'.") % name)
if not bypass_caacl:
if principal_type == KRBTGT:
ca_kdc_check(ldap, alt_principal.hostname)
else:
caacl_check(alt_principal, ca, profile_id)
elif isinstance(gn, (x509.KRB5PrincipalName, x509.UPN)):
if principal_type == KRBTGT:
principal_obj = dict()
principal_obj['krbprincipalname'] = [
kerberos.Principal((u'krbtgt', realm), realm)]
if not _principal_name_matches_principal(
gn.name, principal_obj):
raise errors.ValidationError(
name='csr',
error=_(
"Principal '%s' in subject alt name does not "
"match requested principal") % gn.name)
elif isinstance(gn, cryptography.x509.general_name.RFC822Name):
if principal_type == USER:
if not _emails_are_valid([gn.value],
principal_obj.get('mail', [])):
raise errors.ValidationError(
name='csr',
error=_(
"RFC822Name does not match "
"any of user's email addresses")
)
else:
raise errors.ValidationError(
name='csr',
error=_(
"subject alt name type %s is forbidden "
"for non-user principals") % "RFC822Name"
)
else:
raise errors.ACIError(
info=_("Subject alt name type %s is forbidden")
% type(gn).__name__)
# Request the certificate
try:
# re-serialise to PEM, in case the user-supplied data has
# extraneous material that will cause Dogtag to freak out
# keep it as string not bytes, it is required later
csr_pem = csr.public_bytes(
serialization.Encoding.PEM).decode('utf-8')
result = self.Backend.ra.request_certificate(
csr_pem, profile_id, ca_id, request_type=request_type)
except errors.HTTPRequestError as e:
if e.status == 409: # pylint: disable=no-member
raise errors.CertificateOperationError(
error=_("CA '%s' is disabled") % ca)
else:
raise e
if not raw:
try:
self.obj._parse(result, all)
except ValueError as e:
self.add_message(
messages.CertificateInvalid(
subject=principal,
reason=e,
)
)
result['request_id'] = int(result['request_id'])
result['cacn'] = ca_obj['cn'][0]
# Success? Then add it to the principal's entry
# (unless the profile tells us not to)
profile = api.Command['certprofile_show'](profile_id)
store = profile['result']['ipacertprofilestoreissued'][0] == 'TRUE'
if store and 'certificate' in result:
cert = result.get('certificate')
kwargs = dict(addattr=u'usercertificate={}'.format(cert))
# note: we call different commands for the different
# principal types because handling of 'userCertificate'
# vs. 'userCertificate;binary' varies by plugin.
if principal_type == SERVICE:
api.Command['service_mod'](principal_string, **kwargs)
elif principal_type == HOST:
api.Command['host_mod'](principal.hostname, **kwargs)
elif principal_type == USER:
api.Command['user_mod'](principal.username, **kwargs)
elif principal_type == KRBTGT:
logger.error("Profiles used to store cert should't be "
"used for krbtgt certificates")
if 'certificate_chain' in ca_obj:
cert = x509.load_der_x509_certificate(
base64.b64decode(result['certificate']))
cert = cert.public_bytes(serialization.Encoding.DER)
result['certificate_chain'] = [cert] + ca_obj['certificate_chain']
return dict(
result=result,
value=pkey_to_value(int(result['request_id']), kw),
)
def lookup_principal(self, principal):
"""
Look up a principal's account. Only works for users, hosts, services.
"""
return self.api.Backend.ldap2.find_entry_by_attr(
'krbprincipalname', principal, 'krbprincipalaux',
base_dn=DN(self.api.env.container_accounts, self.api.env.basedn)
)
def lookup_or_add_principal(self, principal, add):
"""
Look up a principal or add it if it does not exist.
Only works for users, hosts, services. krbtgt must be
handled separately.
Only service principals get added, and only when ``add`` is
``True``. If ``add`` is requested for a nonexistant user or
host, raise ``OperationNotSupportedForPrincipalTypes``.
:param principal: ``kerberos.Principal`` to look up
:param add: whether to add the principal if not found; bool
:return: an ``LDAPEntry``
"""
try:
return self.lookup_principal(principal)
except errors.NotFound:
if add:
if principal.is_service and not principal.is_host:
self.api.Command.service_add(
str(principal), all=True, force=True)
return self.lookup_principal(principal) # we want an LDAPEntry
else:
if principal.is_user:
princtype_str = _('user')
else:
princtype_str = _('host')
raise errors.OperationNotSupportedForPrincipalType(
operation=_("'add' option"),
principal_type=princtype_str)
else:
raise errors.NotFound(
reason=_("The principal for this request doesn't exist."))
def _emails_are_valid(csr_emails, principal_emails):
"""
Checks if any email address from certificate request does not
appear in ldap entry, comparing the domain part case-insensitively.
"""
def lower_domain(email):
email_splitted = email.split('@', 1)
if len(email_splitted) > 1:
email_splitted[1] = email_splitted[1].lower()
return '@'.join(email_splitted)
principal_emails_lower = set(map(lower_domain, principal_emails))
csr_emails_lower = set(map(lower_domain, csr_emails))
return csr_emails_lower.issubset(principal_emails_lower)
def principal_to_principal_type(principal):
if principal.is_user:
return USER
elif principal.is_host:
return HOST
elif principal.service_name == 'krbtgt':
return KRBTGT
else:
return SERVICE
def _dns_name_matches_principal(name, principal, principal_obj):
"""
Ensure that a DNS name matches the given principal.
:param name: The DNS name to match
:param principal: The subject ``Principal``
:param principal_obj: The subject principal's LDAP object
:return: True if name matches, otherwise False
"""
if principal_obj is None:
return False
for alias in principal_obj.get('krbprincipalname', []):
# we can only compare them if both subject principal and
# the alias are service or host principals
if not (alias.is_service and principal.is_service):
continue
# ignore aliases with different realm or service name from
# subject principal
if alias.realm != principal.realm:
continue
if alias.service_name != principal.service_name:
continue
# now compare DNS name to alias hostname
if name.lower() == alias.hostname.lower():
return True # we have a match
return False
def _principal_name_matches_principal(name, principal_obj):
"""
Ensure that a stringy principal name (e.g. from UPN
or KRB5PrincipalName OtherName) matches the given principal.
"""
try:
principal = kerberos.Principal(name)
except ValueError:
return False
return principal in principal_obj.get('krbprincipalname', [])
@register()
class cert_status(Retrieve, BaseCertMethod, VirtualCommand):
__doc__ = _('Check the status of a certificate signing request.')
obj_name = 'certreq'
attr_name = 'status'
operation = "certificate status"
def execute(self, request_id, **kw):
ca_enabled_check(self.api)
self.check_access()
# Dogtag requests are uniquely identified by their number;
# furthermore, Dogtag (as at v10.3.4) does not report the
# target CA in request data, so we cannot check. So for
# now, there is nothing we can do with the 'cacn' option
# but check if the specified CA exists.
self.api.Command.ca_show(kw['cacn'])
return dict(
result=self.Backend.ra.check_request_status(str(request_id)),
value=pkey_to_value(request_id, kw),
)
@register()
class cert(BaseCertObject):
takes_params = BaseCertObject.takes_params + (
Str(
'status',
label=_('Status'),
flags={'no_create', 'no_update', 'no_search'},
),
Flag(
'revoked',
label=_('Revoked'),
flags={'no_create', 'no_update', 'no_search'},
),
Int(
'revocation_reason',
label=_('Revocation reason'),
doc=_('Reason for revoking the certificate (0-10). Type '
'"ipa help cert" for revocation reason details. '),
minvalue=0,
maxvalue=10,
flags={'no_create', 'no_update'},
),
)
def get_params(self):
for param in super(cert, self).get_params():
if param.name == 'serial_number':
param = param.clone(primary_key=True)
elif param.name in ('certificate', 'issuer'):
param = param.clone(flags=param.flags - {'no_search'})
yield param
for owner, search_key in self._owners():
yield search_key.clone_rename(
'owner_{0}'.format(owner.name),
required=False,
multivalue=True,
primary_key=False,
label=_("Owner %s") % owner.object_name,
flags={'no_create', 'no_update', 'no_search'},
)
def _owners(self):
for obj_name, search_key in [('user', None),
('host', None),
('service', 'krbprincipalname')]:
obj = self.api.Object[obj_name]
if search_key is None:
pkey = obj.primary_key
else:
pkey = obj.params[search_key]
yield obj, pkey
def _fill_owners(self, obj):
dns = obj.pop('owner', None)
if dns is None:
return
for owner, _search_key in self._owners():
container_dn = DN(owner.container_dn, self.api.env.basedn)
name = 'owner_' + owner.name
for dn in dns:
if dn.endswith(container_dn, 1):
value = owner.get_primary_key_from_dn(dn)
obj.setdefault(name, []).append(value)
class CertMethod(BaseCertMethod):
def get_options(self):
for option in super(CertMethod, self).get_options():
yield option
for o in self.has_output:
if isinstance(o, (output.Entry, output.ListOfEntries)):
yield Flag(
'no_members',
doc=_("Suppress processing of membership attributes."),
exclude='webui',
flags={'no_output'},
)
break
@register()
class cert_show(Retrieve, CertMethod, VirtualCommand):
__doc__ = _('Retrieve an existing certificate.')
takes_options = (
Str('out?',
label=_('Output filename'),
doc=_('File to store the certificate in.'),
exclude='webui',
),
_chain_flag,
)
operation="retrieve certificate"
def execute(self, serial_number, all=False, raw=False, no_members=False,
chain=False, **options):
ca_enabled_check(self.api)
# Dogtag lightweight CAs have shared serial number domain, so
# we don't tell Dogtag the issuer (but we check the cert after).
#
result = self.Backend.ra.get_certificate(str(serial_number))
cert = x509.load_der_x509_certificate(
base64.b64decode(result['certificate']))
try:
self.check_access()
except errors.ACIError as acierr:
logger.debug("Not granted by ACI to retrieve certificate, "
"looking at principal")
if not bind_principal_can_manage_cert(cert):
raise acierr # pylint: disable=E0702
ca_obj = api.Command.ca_show(
options['cacn'],
all=all,
chain=chain,
)['result']
if DN(cert.issuer) != DN(ca_obj['ipacasubjectdn'][0]):
# DN of cert differs from what we requested
raise errors.NotFound(
reason=_("Certificate with serial number %(serial)s "
"issued by CA '%(ca)s' not found")
% dict(serial=serial_number, ca=options['cacn']))
der_cert = base64.b64decode(result['certificate'])
if all or not no_members:
ldap = self.api.Backend.ldap2
filter = ldap.make_filter_from_attr('usercertificate', der_cert)
try:
entries = ldap.get_entries(base_dn=self.api.env.basedn,
filter=filter,
attrs_list=[''])
except errors.EmptyResult:
entries = []
for entry in entries:
result.setdefault('owner', []).append(entry.dn)
if not raw:
result['certificate'] = result['certificate'].replace('\r\n', '')
self.obj._parse(result, all)
result['revoked'] = ('revocation_reason' in result)
self.obj._fill_owners(result)
result['cacn'] = ca_obj['cn'][0]
if 'certificate_chain' in ca_obj:
result['certificate_chain'] = (
[der_cert] + ca_obj['certificate_chain'])
return dict(result=result, value=pkey_to_value(serial_number, options))
@register()
class cert_revoke(PKQuery, CertMethod, VirtualCommand):
__doc__ = _('Revoke a certificate.')
operation = "revoke certificate"
def get_options(self):
# FIXME: The default is 0. Is this really an Int param?
yield self.obj.params['revocation_reason'].clone(
default=0,
autofill=True,
)
for option in super(cert_revoke, self).get_options():
yield option
def execute(self, serial_number, **kw):
ca_enabled_check(self.api)
# Make sure that the cert specified by issuer+serial exists.
# Will raise NotFound if it does not.
resp = api.Command.cert_show(unicode(serial_number), cacn=kw['cacn'])
try:
self.check_access()
except errors.ACIError as acierr:
logger.debug("Not granted by ACI to revoke certificate, "
"looking at principal")
try:
cert = x509.load_der_x509_certificate(
base64.b64decode(resp['result']['certificate']))
if not bind_principal_can_manage_cert(cert):
raise acierr
except errors.NotImplementedError:
raise acierr
revocation_reason = kw['revocation_reason']
if revocation_reason == 7:
raise errors.CertificateOperationError(error=_('7 is not a valid revocation reason'))
return dict(
# Dogtag lightweight CAs have shared serial number domain, so
# we don't tell Dogtag the issuer (but we already checked that
# the given serial was issued by the named ca).
result=self.Backend.ra.revoke_certificate(
str(serial_number), revocation_reason=revocation_reason)
)
@register()
class cert_remove_hold(PKQuery, CertMethod, VirtualCommand):
__doc__ = _('Take a revoked certificate off hold.')
operation = "certificate remove hold"
def execute(self, serial_number, **kw):
ca_enabled_check(self.api)
# Make sure that the cert specified by issuer+serial exists.
# Will raise NotFound if it does not.
api.Command.cert_show(serial_number, cacn=kw['cacn'])
self.check_access()
return dict(
# Dogtag lightweight CAs have shared serial number domain, so
# we don't tell Dogtag the issuer (but we already checked that
# the given serial was issued by the named ca).
result=self.Backend.ra.take_certificate_off_hold(
str(serial_number))
)
@register()
class cert_find(Search, CertMethod):
__doc__ = _('Search for existing certificates.')
takes_options = (
Str('subject?',
label=_('Subject'),
doc=_('Match cn attribute in subject'),
autofill=False,
),
Int('min_serial_number?',
doc=_("minimum serial number"),
autofill=False,
minvalue=0,
maxvalue=2147483647,
),
Int('max_serial_number?',
doc=_("maximum serial number"),
autofill=False,
minvalue=0,
maxvalue=2147483647,
),
Flag('exactly?',
doc=_('match the common name exactly'),
autofill=False,
),
DateTime('validnotafter_from?',
doc=_('Valid not after from this date (YYYY-mm-dd)'),
normalizer=normalize_pkidate,
autofill=False,
),
DateTime('validnotafter_to?',
doc=_('Valid not after to this date (YYYY-mm-dd)'),
normalizer=normalize_pkidate,
autofill=False,
),
DateTime('validnotbefore_from?',
doc=_('Valid not before from this date (YYYY-mm-dd)'),
normalizer=normalize_pkidate,
autofill=False,
),
DateTime('validnotbefore_to?',
doc=_('Valid not before to this date (YYYY-mm-dd)'),
normalizer=normalize_pkidate,
autofill=False,
),
DateTime('issuedon_from?',
doc=_('Issued on from this date (YYYY-mm-dd)'),
normalizer=normalize_pkidate,
autofill=False,
),
DateTime('issuedon_to?',
doc=_('Issued on to this date (YYYY-mm-dd)'),
normalizer=normalize_pkidate,
autofill=False,
),
DateTime('revokedon_from?',
doc=_('Revoked on from this date (YYYY-mm-dd)'),
normalizer=normalize_pkidate,
autofill=False,
),
DateTime('revokedon_to?',
doc=_('Revoked on to this date (YYYY-mm-dd)'),
normalizer=normalize_pkidate,
autofill=False,
),
Flag('pkey_only?',
label=_("Primary key only"),
doc=_("Results should contain primary key attribute only "
"(\"certificate\")"),
),
Int('timelimit?',
label=_('Time Limit'),
doc=_('Time limit of search in seconds (0 is unlimited)'),
minvalue=0,
),
Int('sizelimit?',
label=_("Size Limit"),
doc=_("Maximum number of entries returned (0 is unlimited)"),
minvalue=0,
),
)
msg_summary = ngettext(
'%(count)d certificate matched', '%(count)d certificates matched', 0
)
def get_options(self):
for option in super(cert_find, self).get_options():
if option.name == 'no_members':
option = option.clone(default=True,
flags=set(option.flags) | {'no_option'})
elif option.name == 'cacn':
# make CA optional, so that user may directly
# specify Issuer DN instead
option = option.clone(default=None, autofill=None)
yield option
for owner, search_key in self.obj._owners():
yield search_key.clone_rename(
'{0}'.format(owner.name),
required=False,
multivalue=True,
primary_key=False,
query=True,
cli_name='{0}s'.format(owner.name),
doc=(_("Search for certificates with these owner %s.") %
owner.object_name_plural),
label=owner.object_name,
)
yield search_key.clone_rename(
'no_{0}'.format(owner.name),
required=False,
multivalue=True,
primary_key=False,
query=True,
cli_name='no_{0}s'.format(owner.name),
doc=(_("Search for certificates without these owner %s.") %
owner.object_name_plural),
label=owner.object_name,
)
def _get_cert_key(self, cert):
return (DN(cert.issuer), cert.serial_number)
def _cert_search(self, pkey_only, **options):
result = collections.OrderedDict()
try:
cert = options['certificate']
except KeyError:
return result, False, False
obj = {'serial_number': cert.serial_number}
if not pkey_only:
obj['certificate'] = base64.b64encode(
cert.public_bytes(x509.Encoding.DER)).decode('ascii')
result[self._get_cert_key(cert)] = obj
return result, False, True
def _ca_search(self, raw, pkey_only, exactly, **options):
ra_options = {}
for name in ('revocation_reason',
'issuer',
'subject',
'min_serial_number', 'max_serial_number',
'validnotafter_from', 'validnotafter_to',
'validnotbefore_from', 'validnotbefore_to',
'issuedon_from', 'issuedon_to',
'revokedon_from', 'revokedon_to'):
try:
value = options[name]
except KeyError:
continue
if isinstance(value, datetime.datetime):
value = value.strftime(PKIDATE_FORMAT)
elif isinstance(value, DN):
value = unicode(value)
ra_options[name] = value
if exactly:
ra_options['exactly'] = True
result = collections.OrderedDict()
complete = bool(ra_options)
try:
ca_enabled_check(self.api)
except errors.NotFound:
if ra_options:
raise
return result, False, complete
ca_objs = self.api.Command.ca_find(
timelimit=0,
sizelimit=0,
)['result']
ca_objs = {DN(ca['ipacasubjectdn'][0]): ca for ca in ca_objs}
ra = self.api.Backend.ra
for ra_obj in ra.find(ra_options):
issuer = DN(ra_obj['issuer'])
serial_number = ra_obj['serial_number']
try:
ca_obj = ca_objs[issuer]
except KeyError:
continue
if pkey_only:
obj = {'serial_number': serial_number}
else:
obj = ra_obj
if not raw:
obj['issuer'] = issuer
obj['subject'] = DN(ra_obj['subject'])
obj['valid_not_before'] = (
convert_pkidatetime(obj['valid_not_before']))
obj['valid_not_after'] = (
convert_pkidatetime(obj['valid_not_after']))
obj['revoked'] = (
ra_obj['status'] in (u'REVOKED', u'REVOKED_EXPIRED'))
obj['cacn'] = ca_obj['cn'][0]
result[issuer, serial_number] = obj
return result, False, complete
def _ldap_search(self, all, pkey_only, no_members, **options):
ldap = self.api.Backend.ldap2
filters = []
for owner, search_key in self.obj._owners():
for prefix, rule in (('', ldap.MATCH_ALL),
('no_', ldap.MATCH_NONE)):
try:
value = options[prefix + owner.name]
except KeyError:
continue
filter = ldap.make_filter_from_attr(
'objectclass',
owner.object_class,
ldap.MATCH_ALL)
if filter not in filters:
filters.append(filter)
filter = ldap.make_filter_from_attr(
search_key.name,
value,
rule)
filters.append(filter)
result = collections.OrderedDict()
complete = bool(filters)
cert = options.get('certificate')
if cert is not None:
filter = ldap.make_filter_from_attr(
'usercertificate', cert.public_bytes(x509.Encoding.DER))
else:
filter = '(usercertificate=*)'
filters.append(filter)
filter = ldap.combine_filters(filters, ldap.MATCH_ALL)
try:
entries, truncated = ldap.find_entries(
base_dn=self.api.env.basedn,
filter=filter,
attrs_list=['usercertificate'],
time_limit=0,
size_limit=0,
)
except errors.EmptyResult:
entries = []
truncated = False
else:
try:
ldap.handle_truncated_result(truncated)
except errors.LimitsExceeded as e:
self.add_message(messages.SearchResultTruncated(reason=e))
truncated = bool(truncated)
ca_enabled = getattr(context, 'ca_enabled')
for entry in entries:
for attr in ('usercertificate', 'usercertificate;binary'):
for cert in entry.get(attr, []):
cert_key = self._get_cert_key(cert)
try:
obj = result[cert_key]
except KeyError:
obj = {'serial_number': cert.serial_number}
if not pkey_only and (all or not ca_enabled):
# Retrieving certificate details is now deferred
# until after all certificates are collected.
# For the case of CA-less we need to keep
# the certificate because getting it again later
# would require unnecessary LDAP searches.
obj['certificate'] = (
base64.b64encode(
cert.public_bytes(x509.Encoding.DER))
.decode('ascii'))
result[cert_key] = obj
if not pkey_only and (all or not no_members):
owners = obj.setdefault('owner', [])
if entry.dn not in owners:
owners.append(entry.dn)
return result, truncated, complete
def execute(self, criteria=None, all=False, raw=False, pkey_only=False,
no_members=True, timelimit=None, sizelimit=None, **options):
# Store ca_enabled status in the context to save making the API
# call multiple times.
ca_enabled = self.api.Command.ca_is_enabled()['result']
setattr(context, 'ca_enabled', ca_enabled)
if 'cacn' in options:
ca_obj = api.Command.ca_show(options['cacn'])['result']
ca_sdn = unicode(ca_obj['ipacasubjectdn'][0])
if 'issuer' in options:
if DN(ca_sdn) != DN(options['issuer']):
# client has provided both 'ca' and 'issuer' but
# issuer DNs don't match; result must be empty
return dict(result=[], count=0, truncated=False)
else:
options['issuer'] = ca_sdn
if criteria is not None:
return dict(result=[], count=0, truncated=False)
# respect the configured search limits
if timelimit is None:
timelimit = self.api.Backend.ldap2.time_limit
if sizelimit is None:
sizelimit = self.api.Backend.ldap2.size_limit
result = collections.OrderedDict()
truncated = False
complete = False
for sub_search in (self._cert_search,
self._ca_search,
self._ldap_search):
sub_result, sub_truncated, sub_complete = sub_search(
all=all,
raw=raw,
pkey_only=pkey_only,
no_members=no_members,
**options)
if sub_complete:
for key in tuple(result):
if key not in sub_result:
del result[key]
for key, sub_obj in six.iteritems(sub_result):
try:
obj = result[key]
except KeyError:
if complete:
continue
result[key] = sub_obj
else:
obj.update(sub_obj)
truncated = truncated or sub_truncated
complete = complete or sub_complete
if not pkey_only:
ca_objs = {}
if ca_enabled:
ra = self.api.Backend.ra
for key, obj in six.iteritems(result):
if all and 'cacn' in obj:
_issuer, serial_number = key
cacn = obj['cacn']
try:
ca_obj = ca_objs[cacn]
except KeyError:
ca_obj = ca_objs[cacn] = (
self.api.Command.ca_show(cacn, all=True)['result'])
obj.update(ra.get_certificate(str(serial_number)))
if not raw:
obj['certificate'] = (
obj['certificate'].replace('\r\n', ''))
if 'certificate_chain' in ca_obj:
cert_der = base64.b64decode(obj['certificate'])
obj['certificate_chain'] = (
[cert_der] + ca_obj['certificate_chain'])
if not raw:
self.obj._parse(obj, all)
if not ca_enabled and not all:
# For the case of CA-less don't display the full
# certificate unless requested. It is kept in the
# entry from _ldap_search() so its attributes can
# be retrieved.
obj.pop('certificate', None)
self.obj._fill_owners(obj)
result = list(six.itervalues(result))
if (len(result) > sizelimit > 0):
if not truncated:
self.add_message(messages.SearchResultTruncated(
reason=errors.SizeLimitExceeded()))
result = result[:sizelimit]
truncated = True
ret = dict(
result=result
)
ret['count'] = len(ret['result'])
ret['truncated'] = bool(truncated)
return ret
@register()
class ca_is_enabled(Command):
__doc__ = _('Checks if any of the servers has the CA service enabled.')
NO_CLI = True
has_output = output.standard_value
def execute(self, *args, **options):
base_dn = DN(('cn', 'masters'), ('cn', 'ipa'), ('cn', 'etc'),
self.api.env.basedn)
filter = '(&(objectClass=ipaConfigObject)(cn=CA))'
try:
self.api.Backend.ldap2.find_entries(
base_dn=base_dn, filter=filter, attrs_list=[])
except errors.NotFound:
result = False
else:
result = True
return dict(result=result, value=pkey_to_value(None, options))
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