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85d4f2d9c6
freeipa/ipaserver/install/cainstance.py
Rob Crittenden 85d4f2d9c6 Revert "Remove test for minimum ACME support and rely on package deps" 
This reverts commit 81c97bb992.

This is to make IPA installable again with older versions of dogtag
so it will install on CentOS 8 Stream.

ACME will not be deployed but on upgrade, if pki 10.10.x is available
then it will be.

https://pagure.io/freeipa/issue/8634

Signed-off-by: Rob Crittenden <rcritten@redhat.com>
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
2021-01-15 10:07:33 +01:00

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# Authors: Rob Crittenden <rcritten@redhat.com>
# Ade Lee <alee@redhat.com>
# Andrew Wnuk <awnuk@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/>.
#
from __future__ import print_function, absolute_import
import base64
import binascii
import enum
import logging
import dbus
import ldap
import os
import re
import shutil
import ssl
import sys
import syslog
import time
import tempfile
from configparser import RawConfigParser
from pkg_resources import parse_version
from ipalib import api
from ipalib import x509
from ipalib import errors
import ipalib.constants
from ipalib.install import certmonger
from ipaplatform import services
from ipaplatform.paths import paths
from ipaplatform.tasks import tasks
from ipapython import directivesetter
from ipapython import dogtag
from ipapython import ipautil
from ipapython.certdb import get_ca_nickname
from ipapython.dn import DN, RDN
from ipapython.ipa_log_manager import standard_logging_setup
from ipaserver.secrets.kem import IPAKEMKeys
from ipaserver.install import certs
from ipaserver.install import dsinstance
from ipaserver.install import installutils
from ipaserver.install import replication
from ipaserver.install import sysupgrade
from ipaserver.install.dogtaginstance import DogtagInstance, INTERNAL_TOKEN
from ipaserver.masters import ENABLED_SERVICE
logger = logging.getLogger(__name__)
ADMIN_GROUPS = [
'Enterprise CA Administrators',
'Enterprise KRA Administrators',
'Security Domain Administrators'
]
ACME_AGENT_GROUP = 'Enterprise ACME Administrators'
PROFILES_DN = DN(('ou', 'certificateProfiles'), ('ou', 'ca'), ('o', 'ipaca'))
def check_ports():
"""Check that dogtag ports (8080, 8443) are available.
Returns True when ports are free, False if they are taken.
"""
return all([ipautil.check_port_bindable(8443),
ipautil.check_port_bindable(8080)])
def get_preop_pin(instance_root, instance_name):
# Only used for Dogtag 9
preop_pin = None
filename = instance_root + "/" + instance_name + "/conf/CS.cfg"
# read the config file and get the preop pin
try:
f = open(filename)
except IOError as e:
logger.error("Cannot open configuration file.%s", str(e))
raise e
data = f.read()
data = data.split('\n')
pattern = re.compile("preop.pin=(.*)")
for line in data:
match = re.search(pattern, line)
if match:
preop_pin = match.group(1)
break
if preop_pin is None:
raise RuntimeError(
"Unable to find preop.pin in %s. Is your CA already configured?" %
filename)
return preop_pin
def import_pkcs12(input_file, input_passwd, cert_database,
cert_passwd):
ipautil.run([paths.PK12UTIL, "-d", cert_database,
"-i", input_file,
"-k", cert_passwd,
"-w", input_passwd])
def get_value(s):
"""
Parse out a name/value pair from a Javascript variable.
"""
try:
expr = s.split('=', 1)
value = expr[1]
value = value.replace('\"', '')
value = value.replace(';', '')
value = value.replace('\\n', '\n')
value = value.replace('\\r', '\r')
return value
except IndexError:
return None
def find_substring(data, value):
"""
Scan through a list looking for a string that starts with value.
"""
for d in data:
if d.startswith(value):
return get_value(d)
return None
def get_defList(data):
"""
Return a dictionary of defList name/value pairs.
A certificate signing request is specified as a series of these.
"""
varname = None
value = None
skip = False
defdict = {}
for d in data:
if d.startswith("defList = new Object"):
varname = None
value = None
skip = False
if d.startswith("defList.defId"):
varname = get_value(d)
if d.startswith("defList.defVal"):
value = get_value(d)
if skip:
varname = None
value = None
skip = False
if d.startswith("defList.defConstraint"):
ctype = get_value(d)
if ctype == "readonly":
skip = True
if varname and value:
defdict[varname] = value
varname = None
value = None
return defdict
def get_outputList(data):
"""
Return a dictionary of outputList name/value pairs.
The output from issuing a certificate is a series of these.
"""
varname = None
value = None
outputdict = {}
for d in data:
if d.startswith("outputList = new"):
varname = None
value = None
if d.startswith("outputList.outputId"):
varname = get_value(d)
if d.startswith("outputList.outputVal"):
value = get_value(d)
if varname and value:
outputdict[varname] = value
varname = None
value = None
return outputdict
def get_crl_files(path=None):
"""
Traverse dogtag's CRL files in default CRL publish directory or in chosen
target directory.
@param path Custom target directory
"""
if path is None:
path = paths.PKI_CA_PUBLISH_DIR
files = os.listdir(path)
for f in files:
if f == "MasterCRL.bin":
yield os.path.join(path, f)
elif f.endswith(".der"):
yield os.path.join(path, f)
def is_step_one_done():
"""Read CS.cfg and determine if step one of an external CA install is done
"""
path = paths.CA_CS_CFG_PATH
if not os.path.exists(path):
return False
test = directivesetter.get_directive(path, 'preop.ca.type', '=')
if test == "otherca":
return True
return False
def is_ca_installed_locally():
"""Check if CA is installed locally by checking for existence of CS.cfg
:return:True/False
"""
return os.path.exists(paths.CA_CS_CFG_PATH)
class InconsistentCRLGenConfigException(Exception):
pass
class CAInstance(DogtagInstance):
"""
When using a dogtag CA the DS database contains just the
server cert for DS. The mod_nss database will contain the RA agent
cert that will be used to do authenticated requests against dogtag.
This is done because we use python-nss and will inherit the opened
NSS database in mod_python. In nsslib.py we do an nssinit but this will
return success if the database is already initialized. It doesn't care
if the database is different or not.
external is a state machine:
0 = not an externally signed CA
1 = generating CSR to be signed
2 = have signed cert, continue installation
"""
server_cert_name = 'Server-Cert cert-pki-ca'
# Mapping of nicknames for tracking requests, and the profile to
# use for that certificate. 'configure_renewal()' reads this
# dict. The profile MUST be specified.
tracking_reqs = {
'auditSigningCert cert-pki-ca': 'caSignedLogCert',
'ocspSigningCert cert-pki-ca': 'caOCSPCert',
'subsystemCert cert-pki-ca': 'caSubsystemCert',
'caSigningCert cert-pki-ca': 'caCACert',
server_cert_name: 'caServerCert',
}
token_names = {
# Server-Cert always on internal token
server_cert_name: INTERNAL_TOKEN,
}
# The following must be aligned with the RewriteRule defined in
# install/share/ipa-pki-proxy.conf.template
crl_rewrite_pattern = r"^\s*(RewriteRule\s+\^/ipa/crl/MasterCRL.bin\s.*)$"
crl_rewrite_comment = r"^#\s*RewriteRule\s+\^/ipa/crl/MasterCRL.bin\s.*$"
crl_rewriterule = "\nRewriteRule ^/ipa/crl/MasterCRL.bin " \
"http://{}/ca/ee/ca/getCRL?" \
"op=getCRL&crlIssuingPoint=MasterCRL " \
"[L,R=301,NC]"
def __init__(self, realm=None, host_name=None, custodia=None):
super(CAInstance, self).__init__(
realm=realm,
subsystem="CA",
service_desc="certificate server",
host_name=host_name,
service_prefix=ipalib.constants.PKI_GSSAPI_SERVICE_NAME,
config=paths.CA_CS_CFG_PATH,
)
# for external CAs
self.external = 0
self.csr_file = None
self.cert_file = None
self.cert_chain_file = None
self.basedn = DN(('o', 'ipaca'))
if realm is not None:
self.canickname = get_ca_nickname(realm)
else:
self.canickname = None
self.ra_cert = None
self.requestId = None
self.no_db_setup = False
self.keytab = os.path.join(
paths.PKI_TOMCAT, self.service_prefix + '.keytab')
# Custodia instance for RA key retrieval
self._custodia = custodia
def configure_instance(self, host_name, dm_password, admin_password,
pkcs12_info=None, master_host=None, csr_file=None,
cert_file=None, cert_chain_file=None,
master_replication_port=389,
subject_base=None, ca_subject=None,
ca_signing_algorithm=None,
ca_type=None, external_ca_profile=None,
ra_p12=None, ra_only=False,
promote=False, use_ldaps=False,
pki_config_override=None):
"""Create a CA instance.
To create a clone, pass in pkcs12_info.
Creating a CA with an external signer is a 2-step process. In
step 1 we generate a CSR. In step 2 we are given the cert and
chain and actually proceed to create the CA. For step 1 set
csr_file. For step 2 set cert_file and cert_chain_file.
"""
self.fqdn = host_name
self.dm_password = dm_password
self.admin_user = "admin"
self.admin_groups = ADMIN_GROUPS
# NOTE: "admin_password" refers to the password for PKI
# "admin" account. This is not necessarily the same as
# the IPA admin password. Indeed, ca.configure_instance
# gets called with admin_password=dm_password.
#
self.admin_password = admin_password
self.pkcs12_info = pkcs12_info
if self.pkcs12_info is not None:
self.clone = True
self.master_host = master_host
self.master_replication_port = master_replication_port
self.ra_p12 = ra_p12
self.subject_base = \
subject_base or installutils.default_subject_base(self.realm)
self.ca_subject = \
ca_subject or installutils.default_ca_subject_dn(self.subject_base)
self.ca_signing_algorithm = ca_signing_algorithm
if ca_type is not None:
self.ca_type = ca_type
else:
self.ca_type = x509.ExternalCAType.GENERIC.value
self.external_ca_profile = external_ca_profile
self.no_db_setup = promote
self.use_ldaps = use_ldaps
self.pki_config_override = pki_config_override
# Determine if we are installing as an externally-signed CA and
# what stage we're in.
if csr_file is not None:
self.csr_file = csr_file
self.external = 1
elif cert_file is not None:
self.cert_file = cert_file
self.cert_chain_file = cert_chain_file
self.external = 2
if self.clone:
has_ra_cert = os.path.exists(paths.RA_AGENT_PEM)
else:
has_ra_cert = False
if not ra_only:
if promote:
# Setup Database
self.step("creating certificate server db", self.__create_ds_db)
self.step("setting up initial replication", self.__setup_replication)
self.step("creating ACIs for admin", self.add_ipaca_aci)
self.step("creating installation admin user", self.setup_admin)
self.step("configuring certificate server instance",
self.__spawn_instance)
# Config file and ACL modifications require either restart or
# offline update of Dogtag.
self.step("stopping certificate server instance to update CS.cfg",
self.stop_instance)
self.step("backing up CS.cfg", self.safe_backup_config)
self.step("Add ipa-pki-wait-running", self.add_ipa_wait)
self.step("secure AJP connector", self.secure_ajp_connector)
self.step("reindex attributes", self.reindex_task)
self.step("exporting Dogtag certificate store pin",
self.create_certstore_passwdfile)
self.step("disabling nonces", self.__disable_nonce)
self.step("set up CRL publishing", self.__enable_crl_publish)
self.step("enable PKIX certificate path discovery and validation",
self.enable_pkix)
self.step("authorizing RA to modify profiles",
configure_profiles_acl)
self.step("authorizing RA to manage lightweight CAs",
configure_lightweight_ca_acls)
self.step("Ensure lightweight CAs container exists",
ensure_lightweight_cas_container)
if self.clone and not promote:
self.step(
"Ensuring backward compatibility",
self.__dogtag10_migration)
if promote:
self.step("destroying installation admin user",
self.teardown_admin)
# Materialize config changes and new ACLs
self.step("starting certificate server instance",
self.start_instance)
if promote:
self.step("Finalize replication settings",
self.finalize_replica_config)
# Step 1 of external is getting a CSR so we don't need to do these
# steps until we get a cert back from the external CA.
if self.external != 1:
if not has_ra_cert:
self.step("configure certmonger for renewals",
self.configure_certmonger_renewal_helpers)
if not self.clone:
self.step("requesting RA certificate from CA", self.__request_ra_certificate)
elif promote:
self.step("Importing RA key", self.__import_ra_key)
else:
self.step("importing RA certificate from PKCS #12 file",
self.__import_ra_cert)
if not ra_only:
if not self.clone:
self.step("publishing the CA certificate",
self.__export_ca_chain)
self.step("adding RA agent as a trusted user", self.__create_ca_agent)
self.step("configure certificate renewals", self.configure_renewal)
self.step("Configure HTTP to proxy connections",
self.http_proxy)
self.step("updating IPA configuration", update_ipa_conf)
self.step("enabling CA instance", self.__enable_instance)
if not promote:
if self.clone:
# DL0 workaround; see docstring of __expose_ca_in_ldap
self.step("exposing CA instance on LDAP",
self.__expose_ca_in_ldap)
self.step("migrating certificate profiles to LDAP",
migrate_profiles_to_ldap)
self.step("importing IPA certificate profiles",
import_included_profiles)
self.step("adding default CA ACL", ensure_default_caacl)
self.step("adding 'ipa' CA entry", ensure_ipa_authority_entry)
self.step("configuring certmonger renewal for lightweight CAs",
self.add_lightweight_ca_tracking_requests)
if minimum_acme_support():
self.step("deploying ACME service", self.setup_acme)
if ra_only:
runtime = None
else:
runtime = 180
try:
self.start_creation(runtime=runtime)
finally:
if self.external == 1:
# Don't remove client DB in external CA step 1
# https://pagure.io/freeipa/issue/7742
logger.debug("Keep pkispawn files for step 2")
else:
self.clean_pkispawn_files()
def __spawn_instance(self):
"""
Create and configure a new CA instance using pkispawn.
Creates the config file with IPA specific parameters
and passes it to the base class to call pkispawn
"""
cfg = dict(
pki_ds_secure_connection=self.use_ldaps
)
if self.ca_signing_algorithm is not None:
cfg['ipa_ca_signing_algorithm'] = self.ca_signing_algorithm
if not (os.path.isdir(paths.PKI_TOMCAT_ALIAS_DIR) and
os.path.isfile(paths.PKI_TOMCAT_PASSWORD_CONF)):
# generate pin which we know can be used for FIPS NSS database
pki_pin = ipautil.ipa_generate_password()
cfg['pki_server_database_password'] = pki_pin
else:
pki_pin = None
# When spawning a CA instance, always point to IPA_CA_CRT if it
# exists. Later, when we're performing step 2 of an external CA
# installation, we'll overwrite this key to point to the real
# external CA.
if os.path.exists(paths.IPA_CA_CRT):
cfg['pki_cert_chain_path'] = paths.IPA_CA_CRT
if self.clone:
if self.no_db_setup:
cfg.update(
pki_ds_create_new_db=False,
pki_clone_setup_replication=False,
pki_clone_reindex_data=True,
)
cafile = self.pkcs12_info[0]
# if paths.TMP_CA_P12 exists and is not owned by root,
# shutil.copy will fail if when fs.protected_regular=1
# so remove the file first
ipautil.remove_file(paths.TMP_CA_P12)
shutil.copy(cafile, paths.TMP_CA_P12)
self.service_user.chown(paths.TMP_CA_P12)
self._configure_clone(
cfg,
security_domain_hostname=self.master_host,
clone_pkcs12_path=paths.TMP_CA_P12,
)
# External CA
if self.external == 1:
cfg.update(
pki_external=True,
pki_ca_signing_csr_path=self.csr_file,
)
if self.ca_type == x509.ExternalCAType.MS_CS.value:
# Include MS template name extension in the CSR
template = self.external_ca_profile
if template is None:
# default template name
template = x509.MSCSTemplateV1(u"SubCA")
ext_data = binascii.hexlify(template.get_ext_data())
cfg.update(
pki_req_ext_add=True,
pki_req_ext_oid=template.ext_oid,
pki_req_ext_critical=False,
pki_req_ext_data=ext_data.decode('ascii'),
)
elif self.external == 2:
cert_file = tempfile.NamedTemporaryFile()
with open(self.cert_file, 'rb') as f:
ext_cert = x509.load_unknown_x509_certificate(f.read())
cert_file.write(ext_cert.public_bytes(x509.Encoding.PEM))
ipautil.flush_sync(cert_file)
result = ipautil.run(
[paths.OPENSSL, 'crl2pkcs7',
'-certfile', self.cert_chain_file,
'-nocrl'],
capture_output=True)
cert_chain = result.output
# Dogtag chokes on the header and footer, remove them
# https://bugzilla.redhat.com/show_bug.cgi?id=1127838
cert_chain = re.search(
r'(?<=-----BEGIN PKCS7-----).*?(?=-----END PKCS7-----)',
cert_chain, re.DOTALL).group(0)
cert_chain_file = ipautil.write_tmp_file(cert_chain)
cfg.update(
pki_external=True,
pki_ca_signing_cert_path=cert_file.name,
pki_cert_chain_path=cert_chain_file.name,
pki_external_step_two=True,
)
nolog_list = [self.dm_password, self.admin_password, pki_pin]
config = self._create_spawn_config(cfg)
self.set_hsm_state(config)
with tempfile.NamedTemporaryFile('w') as f:
config.write(f)
f.flush()
self.service_user.chown(f.fileno())
self.backup_state('installed', True)
DogtagInstance.spawn_instance(
self, f.name,
nolog_list=nolog_list
)
if self.external == 1:
print("The next step is to get %s signed by your CA and re-run %s as:" % (self.csr_file, sys.argv[0]))
print("%s --external-cert-file=/path/to/signed_certificate --external-cert-file=/path/to/external_ca_certificate" % sys.argv[0])
sys.exit(0)
else:
if config.getboolean(
self.subsystem, 'pki_backup_keys', fallback=True
):
shutil.move(
paths.CA_BACKUP_KEYS_P12, paths.CACERT_P12
)
logger.debug("completed creating ca instance")
def add_ipa_wait(self):
"""Add ipa-pki-wait-running to pki-tomcatd service
"""
conf = paths.SYSTEMD_PKI_TOMCAT_IPA_CONF
directory = os.path.dirname(conf)
if not os.path.isdir(directory):
os.mkdir(directory)
with open(conf, 'w') as f:
os.fchmod(f.fileno(), 0o644)
f.write('[Service]\n')
f.write('Environment=LC_ALL=C.UTF-8\n')
f.write('ExecStartPost={}\n'.format(paths.IPA_PKI_WAIT_RUNNING))
tasks.systemd_daemon_reload()
def safe_backup_config(self):
"""
Safely handle exceptions if backup_config fails
The parent class raises an exception if the configuration
cannot be backed up. Catch that and log the message but
don't stop the current installer.
"""
try:
super(CAInstance, self).backup_config()
except Exception as e:
logger.warning("Failed to backup CS.cfg: %s", e)
def create_certstore_passwdfile(self):
"""
This method creates a 'pwdfile.txt' file in the Dogtag certificate
store so that this file can be assumed and used for NSSDatabase/CertDB
operations in 'certutil' calls.
"""
passwd = None
token = INTERNAL_TOKEN
with open(paths.PKI_TOMCAT_PASSWORD_CONF, 'r') as f:
for line in f:
(tok, pin) = line.split('=', 1)
if token == tok:
passwd = pin.strip()
break
else:
raise RuntimeError(
"The password to the 'internal' token of the Dogtag "
"certificate store was not found.")
db = certs.CertDB(self.realm, nssdir=paths.PKI_TOMCAT_ALIAS_DIR)
db.create_passwd_file(passwd)
def __update_topology(self):
self._ldap_update(
[paths.CA_TOPOLOGY_ULDIF],
basedir=None,
)
def __disable_nonce(self):
# Turn off Nonces
update_result = installutils.update_file(
self.config, 'ca.enableNonces=true',
'ca.enableNonces=false')
if update_result != 0:
raise RuntimeError("Disabling nonces failed")
self.service_user.chown(self.config)
def enable_pkix(self):
directivesetter.set_directive(paths.SYSCONFIG_PKI_TOMCAT,
'NSS_ENABLE_PKIX_VERIFY', '1',
quotes=False, separator='=')
def __import_ra_cert(self):
"""
Helper method for IPA domain level 0 replica install
"""
self.import_ra_cert(self.ra_p12, self.dm_password)
def import_ra_cert(self, rafile, password=''):
"""
Cloned RAs will use the same RA agent cert as the master so we
need to import from a PKCS#12 file.
Used when setting up replication
"""
with ipautil.write_tmp_file(password + '\n') as f:
pwdarg = 'file:{file}'.format(file=f.name)
# get the private key from the file
ipautil.run([paths.OPENSSL,
"pkcs12",
"-in", rafile,
"-nocerts", "-nodes",
"-out", paths.RA_AGENT_KEY,
"-passin", pwdarg])
# get the certificate from the pkcs12 file
ipautil.run([paths.OPENSSL,
"pkcs12",
"-in", rafile,
"-clcerts", "-nokeys",
"-out", paths.RA_AGENT_PEM,
"-passin", pwdarg])
self._set_ra_cert_perms()
self.configure_agent_renewal()
def __import_ra_key(self):
import_ra_key(self._custodia)
@staticmethod
def _set_ra_cert_perms():
"""
Sets the correct permissions for the RA_AGENT_PEM, RA_AGENT_KEY files
"""
group = ipalib.constants.IPAAPI_GROUP
for fname in (paths.RA_AGENT_PEM, paths.RA_AGENT_KEY):
group.chgrp(fname)
os.chmod(fname, 0o440)
tasks.restore_context(fname)
def __create_ca_agent(self):
"""
Create CA agent, assign a certificate, and add the user to
the appropriate groups for accessing CA services.
"""
conn = api.Backend.ldap2
# create ipara user with RA certificate
user_dn = DN(('uid', "ipara"), ('ou', 'People'), self.basedn)
entry = conn.make_entry(
user_dn,
objectClass=['top', 'person', 'organizationalPerson',
'inetOrgPerson', 'cmsuser'],
uid=["ipara"],
sn=["ipara"],
cn=["ipara"],
usertype=["agentType"],
userstate=["1"],
userCertificate=[self.ra_cert],
description=['2;%s;%s;%s' % (
self.ra_cert.serial_number,
DN(self.ca_subject),
DN(('CN', 'IPA RA'), self.subject_base))])
conn.add_entry(entry)
# add ipara user to Certificate Manager Agents group
group_dn = DN(('cn', 'Certificate Manager Agents'), ('ou', 'groups'),
self.basedn)
conn.add_entry_to_group(user_dn, group_dn, 'uniqueMember')
# add ipara user to Registration Manager Agents group
group_dn = DN(('cn', 'Registration Manager Agents'), ('ou', 'groups'),
self.basedn)
conn.add_entry_to_group(user_dn, group_dn, 'uniqueMember')
def __get_ca_chain(self):
try:
return dogtag.get_ca_certchain(ca_host=self.fqdn)
except Exception as e:
raise RuntimeError("Unable to retrieve CA chain: %s" % str(e))
def __export_ca_chain(self):
"""
Get the CA chain from Dogtag NSS DB and write it to paths.IPA_CA_CRT
"""
# Getting Dogtag CA chain
chain = self.__get_ca_chain()
# Convert to DER because the chain comes back as one long string which
# makes openssl throw up.
data = base64.b64decode(chain)
# Get list of PEM certificates
certlist = x509.pkcs7_to_certs(data, x509.DER)
# We need to append the certs to the existing file, so start by
# reading the file
if os.path.isfile(paths.IPA_CA_CRT):
ca_certs = x509.load_certificate_list_from_file(paths.IPA_CA_CRT)
certlist.extend(ca_certs)
# We have all the certificates in certlist, write them to a PEM file
for path in [paths.IPA_CA_CRT,
paths.KDC_CA_BUNDLE_PEM,
paths.CA_BUNDLE_PEM]:
x509.write_certificate_list(certlist, path, mode=0o644)
def __request_ra_certificate(self):
"""
Request the IPA RA certificate from dogtag.
dogtag automatically generates an admin certificate that
in a usual deployment would be used in the UI to handle
administrative duties. IPA does not use this certificate
except as a bootstrap to generate the RA.
To do this it bends over backwards a bit by modifying the
way typical certificates are retrieved using certmonger by
forcing it to call dogtag-submit directly.
"""
# create a temp PEM file storing the CA chain
chain_file = tempfile.NamedTemporaryFile(
mode="w", dir=paths.VAR_LIB_IPA, delete=False)
chain_file.close()
chain = self.__get_ca_chain()
data = base64.b64decode(chain)
ipautil.run(
[paths.OPENSSL,
"pkcs7",
"-inform",
"DER",
"-print_certs",
"-out", chain_file.name,
], stdin=data, capture_output=False)
# CA agent cert in PEM form
agent_cert = tempfile.NamedTemporaryFile(
mode="w", dir=paths.VAR_LIB_IPA, delete=False)
agent_cert.close()
# CA agent key in PEM form
agent_key = tempfile.NamedTemporaryFile(
mode="w", dir=paths.VAR_LIB_IPA, delete=False)
agent_key.close()
certs.install_pem_from_p12(paths.DOGTAG_ADMIN_P12,
self.dm_password,
agent_cert.name)
certs.install_key_from_p12(paths.DOGTAG_ADMIN_P12,
self.dm_password,
agent_key.name)
agent_args = [paths.CERTMONGER_DOGTAG_SUBMIT,
"--cafile", chain_file.name,
"--ee-url", 'http://%s:8080/ca/ee/ca/' % self.fqdn,
"--agent-url",
'https://%s:8443/ca/agent/ca/' % self.fqdn,
"--certfile", agent_cert.name,
"--keyfile", agent_key.name, ]
helper = " ".join(agent_args)
# configure certmonger renew agent to use temporary agent cert
old_helper = certmonger.modify_ca_helper(
ipalib.constants.RENEWAL_CA_NAME, helper)
try:
# The certificate must be requested using caSubsystemCert profile
# because this profile does not require agent authentication
reqId = certmonger.request_and_wait_for_cert(
certpath=(paths.RA_AGENT_PEM, paths.RA_AGENT_KEY),
principal='host/%s' % self.fqdn,
subject=str(DN(('CN', 'IPA RA'), self.subject_base)),
ca=ipalib.constants.RENEWAL_CA_NAME,
profile=ipalib.constants.RA_AGENT_PROFILE,
pre_command='renew_ra_cert_pre',
post_command='renew_ra_cert',
storage="FILE",
resubmit_timeout=api.env.certmonger_wait_timeout
)
self._set_ra_cert_perms()
self.requestId = str(reqId)
self.ra_cert = x509.load_certificate_from_file(
paths.RA_AGENT_PEM)
finally:
# we can restore the helper parameters
certmonger.modify_ca_helper(
ipalib.constants.RENEWAL_CA_NAME, old_helper)
# remove any temporary files
for f in (chain_file, agent_cert, agent_key):
try:
os.remove(f.name)
except OSError:
pass
def prepare_crl_publish_dir(self):
"""
Prepare target directory for CRL publishing
Returns a path to the CRL publishing directory
"""
publishdir = paths.PKI_CA_PUBLISH_DIR
if not os.path.exists(publishdir):
os.mkdir(publishdir)
os.chmod(publishdir, 0o775)
os.chown(publishdir, 0, self.service_user.pgid)
tasks.restore_context(publishdir)
return publishdir
def __enable_crl_publish(self):
"""
Enable file-based CRL publishing and disable LDAP publishing.
https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Certificate_System/8.0/html/Admin_Guide/Setting_up_Publishing.html
"""
with directivesetter.DirectiveSetter(
self.config, quotes=False, separator='=') as ds:
# Enable file publishing, disable LDAP
ds.set('ca.publish.enable', 'true')
ds.set('ca.publish.cert.enable', 'false')
ds.set('ca.publish.ldappublish.enable', 'false')
# Create the file publisher, der only, not b64
ds.set(
'ca.publish.publisher.impl.FileBasedPublisher.class',
'com.netscape.cms.publish.publishers.FileBasedPublisher'
)
prefix = 'ca.publish.publisher.instance.FileBaseCRLPublisher.'
ds.set(prefix + 'crlLinkExt', 'bin')
ds.set(prefix + 'directory', self.prepare_crl_publish_dir())
ds.set(prefix + 'latestCrlLink', 'true')
ds.set(prefix + 'pluginName', 'FileBasedPublisher')
ds.set(prefix + 'timeStamp', 'LocalTime')
ds.set(prefix + 'zipCRLs', 'false')
ds.set(prefix + 'zipLevel', '9')
ds.set(prefix + 'Filename.b64', 'false')
ds.set(prefix + 'Filename.der', 'true')
# The publishing rule
ds.set('ca.publish.rule.instance.FileCrlRule.enable', 'true')
ds.set('ca.publish.rule.instance.FileCrlRule.mapper', 'NoMap')
ds.set('ca.publish.rule.instance.FileCrlRule.pluginName', 'Rule')
ds.set('ca.publish.rule.instance.FileCrlRule.predicate', '')
ds.set(
'ca.publish.rule.instance.FileCrlRule.publisher',
'FileBaseCRLPublisher'
)
ds.set('ca.publish.rule.instance.FileCrlRule.type', 'crl')
# Now disable LDAP publishing
ds.set('ca.publish.rule.instance.LdapCaCertRule.enable', 'false')
ds.set('ca.publish.rule.instance.LdapCrlRule.enable', 'false')
ds.set(
'ca.publish.rule.instance.LdapUserCertRule.enable',
'false'
)
ds.set('ca.publish.rule.instance.LdapXCertRule.enable', 'false')
# If we are the initial master then we are the CRL generator,
# otherwise we point to that master for CRLs.
if not self.clone:
# These next two are defaults, but I want to be explicit
# that the initial master is the CRL generator.
ds.set('ca.crl.MasterCRL.enableCRLCache', 'true')
ds.set('ca.crl.MasterCRL.enableCRLUpdates', 'true')
ds.set('ca.listenToCloneModifications', 'true')
else:
ds.set('ca.crl.MasterCRL.enableCRLCache', 'false')
ds.set('ca.crl.MasterCRL.enableCRLUpdates', 'false')
ds.set('ca.listenToCloneModifications', 'false')
def uninstall(self):
# just eat state
self.restore_state("enabled")
self.restore_hsm_state()
DogtagInstance.uninstall(self)
self.restore_state("installed")
# At one time we removed this user on uninstall. That can potentially
# orphan files, or worse, if another useradd runs in the interim,
# cause files to have a new owner.
self.restore_state("user_exists")
if not services.knownservices.dbus.is_running():
# some platforms protect dbus with RefuseManualStart=True
services.knownservices.dbus.start()
cmonger = services.knownservices.certmonger
cmonger.start()
bus = dbus.SystemBus()
obj = bus.get_object('org.fedorahosted.certmonger',
'/org/fedorahosted/certmonger')
iface = dbus.Interface(obj, 'org.fedorahosted.certmonger')
for suffix in ['', '-reuse', '-selfsigned']:
name = ipalib.constants.RENEWAL_CA_NAME + suffix
path = iface.find_ca_by_nickname(name)
if path:
iface.remove_known_ca(path)
cmonger.stop()
# remove ipa-pki-wait-running config
ipautil.remove_file(paths.SYSTEMD_PKI_TOMCAT_IPA_CONF)
try:
os.rmdir(os.path.dirname(paths.SYSTEMD_PKI_TOMCAT_IPA_CONF))
except OSError:
pass
tasks.systemd_daemon_reload()
# remove CRL files
logger.debug("Remove old CRL files")
try:
for f in get_crl_files():
logger.debug("Remove %s", f)
ipautil.remove_file(f)
except OSError as e:
logger.warning("Error while removing old CRL files: %s", e)
# remove CRL directory
logger.debug("Remove CRL directory")
if os.path.exists(paths.PKI_CA_PUBLISH_DIR):
try:
shutil.rmtree(paths.PKI_CA_PUBLISH_DIR)
except OSError as e:
logger.warning("Error while removing CRL publish "
"directory: %s", e)
def unconfigure_certmonger_renewal_guard(self):
if not self.is_configured():
return
helper = self.restore_state('certmonger_dogtag_helper')
if helper:
bus = dbus.SystemBus()
obj = bus.get_object('org.fedorahosted.certmonger',
'/org/fedorahosted/certmonger')
iface = dbus.Interface(obj, 'org.fedorahosted.certmonger')
path = iface.find_ca_by_nickname('dogtag-ipa-renew-agent')
if path:
ca_obj = bus.get_object('org.fedorahosted.certmonger', path)
ca_iface = dbus.Interface(ca_obj,
'org.freedesktop.DBus.Properties')
ca_iface.Set('org.fedorahosted.certmonger.ca',
'external-helper', helper)
@staticmethod
def configure_agent_renewal():
try:
certmonger.start_tracking(
certpath=(paths.RA_AGENT_PEM, paths.RA_AGENT_KEY),
ca=ipalib.constants.RENEWAL_CA_NAME,
profile=ipalib.constants.RA_AGENT_PROFILE,
pre_command='renew_ra_cert_pre',
post_command='renew_ra_cert',
storage='FILE')
except RuntimeError as e:
logger.error(
"certmonger failed to start tracking certificate: %s", e)
def stop_tracking_certificates(self, stop_certmonger=True):
"""
Stop tracking our certificates. Called on uninstall. Also called
during upgrade to fix discrepancies.
"""
super(CAInstance, self).stop_tracking_certificates(False)
# stop tracking lightweight CA signing certs
for request_id in certmonger.get_requests_for_dir(self.nss_db):
nickname = certmonger.get_request_value(request_id, 'key-nickname')
if nickname.startswith('caSigningCert cert-pki-ca '):
certmonger.stop_tracking(self.nss_db, nickname=nickname)
try:
certmonger.stop_tracking(certfile=paths.RA_AGENT_PEM)
except RuntimeError as e:
logger.error(
"certmonger failed to stop tracking certificate: %s", e)
if stop_certmonger:
services.knownservices.certmonger.stop()
def is_renewal_master(self, fqdn=None):
if fqdn is None:
fqdn = api.env.host
dn = DN(('cn', 'CA'), ('cn', fqdn), api.env.container_masters,
api.env.basedn)
renewal_filter = '(ipaConfigString=caRenewalMaster)'
try:
api.Backend.ldap2.get_entries(base_dn=dn, filter=renewal_filter,
attrs_list=[])
except errors.NotFound:
return False
return True
def set_renewal_master(self, fqdn=None):
if fqdn is None:
fqdn = api.env.host
base_dn = DN(api.env.container_masters, api.env.basedn)
filter = '(&(cn=CA)(ipaConfigString=caRenewalMaster))'
try:
entries = api.Backend.ldap2.get_entries(
base_dn=base_dn, filter=filter, attrs_list=['ipaConfigString'])
except errors.NotFound:
entries = []
dn = DN(('cn', 'CA'), ('cn', fqdn), base_dn)
master_entry = api.Backend.ldap2.get_entry(dn, ['ipaConfigString'])
for entry in entries:
if master_entry is not None and entry.dn == master_entry.dn:
master_entry = None
continue
entry['ipaConfigString'] = [x for x in entry['ipaConfigString']
if x.lower() != 'carenewalmaster']
api.Backend.ldap2.update_entry(entry)
if master_entry is not None:
master_entry['ipaConfigString'].append('caRenewalMaster')
api.Backend.ldap2.update_entry(master_entry)
def update_cert_config(self, nickname, cert):
"""
When renewing a CA subsystem certificate the configuration file
needs to get the new certificate as well.
nickname is one of the known nicknames.
cert is a DER-encoded certificate.
"""
# The cert directive to update per nickname
directives = {'auditSigningCert cert-pki-ca': 'ca.audit_signing.cert',
'ocspSigningCert cert-pki-ca': 'ca.ocsp_signing.cert',
'caSigningCert cert-pki-ca': 'ca.signing.cert',
'subsystemCert cert-pki-ca': 'ca.subsystem.cert',
'Server-Cert cert-pki-ca': 'ca.sslserver.cert'}
try:
self.backup_config()
except Exception as e:
syslog.syslog(syslog.LOG_ERR, "Failed to backup CS.cfg: %s" % e)
if nickname in directives:
super(CAInstance, self).update_cert_cs_cfg(
directives[nickname], cert)
def __create_ds_db(self):
'''
Create PKI database. Is needed when pkispawn option
pki_ds_create_new_db is set to False
'''
backend = 'ipaca'
suffix = DN(('o', 'ipaca'))
# database
dn = DN(('cn', 'ipaca'), ('cn', 'ldbm database'), ('cn', 'plugins'),
('cn', 'config'))
entry = api.Backend.ldap2.make_entry(
dn,
objectclass=["top", "extensibleObject", "nsBackendInstance"],
cn=[backend],
)
entry['nsslapd-suffix'] = [suffix]
api.Backend.ldap2.add_entry(entry)
# replication
dn = DN(('cn', str(suffix)), ('cn', 'mapping tree'), ('cn', 'config'))
entry = api.Backend.ldap2.make_entry(
dn,
objectclass=["top", "extensibleObject", "nsMappingTree"],
cn=[suffix],
)
entry['nsslapd-state'] = ['Backend']
entry['nsslapd-backend'] = [backend]
api.Backend.ldap2.add_entry(entry)
def __setup_replication(self):
repl = replication.CAReplicationManager(self.realm, self.fqdn)
repl.setup_cs_replication(self.master_host)
# Activate Topology for o=ipaca segments
self.__update_topology()
def finalize_replica_config(self):
repl = replication.CAReplicationManager(self.realm, self.fqdn)
repl.finalize_replica_config(self.master_host)
def __enable_instance(self):
basedn = ipautil.realm_to_suffix(self.realm)
if not self.clone:
config = ['caRenewalMaster']
else:
config = []
self.ldap_configure('CA', self.fqdn, None, basedn, config)
def __expose_ca_in_ldap(self):
"""
In a case when replica is created on DL0 we need to make
sure that query for CA service record of this replica in
ldap will succeed in time of installation.
This method is needed for sucessfull replica installation
on DL0 and should be removed alongside with code for DL0.
To suppress deprecation warning message this method is
not invoking ldap_enable() but _ldap_enable() method.
"""
basedn = ipautil.realm_to_suffix(self.realm)
if not self.clone:
config = ['caRenewalMaster']
else:
config = []
self._ldap_enable(ENABLED_SERVICE, "CA", self.fqdn, basedn, config)
def setup_lightweight_ca_key_retrieval(self):
# Important: there is a typo in the below string, which is known
# and should not be fixed as existing installations already use it
LWCA_KEY_RETRIEVAL = 'setup_lwca_key_retieval'
if sysupgrade.get_upgrade_state('dogtag', LWCA_KEY_RETRIEVAL):
return
logger.debug('Set up lightweight CA key retrieval')
self.__setup_lightweight_ca_key_retrieval_kerberos()
self.__setup_lightweight_ca_key_retrieval_custodia()
logger.debug('Configuring key retriever')
directives = [
('features.authority.keyRetrieverClass',
'com.netscape.ca.ExternalProcessKeyRetriever'),
('features.authority.keyRetrieverConfig.executable',
paths.IPA_PKI_RETRIEVE_KEY),
]
for k, v in directives:
directivesetter.set_directive(
self.config, k, v, quotes=False, separator='=')
sysupgrade.set_upgrade_state('dogtag', LWCA_KEY_RETRIEVAL, True)
def __setup_lightweight_ca_key_retrieval_kerberos(self):
logger.debug('Creating principal')
installutils.kadmin_addprinc(self.principal)
self.suffix = ipautil.realm_to_suffix(self.realm)
self.move_service(self.principal)
logger.debug('Retrieving keytab')
installutils.create_keytab(self.keytab, self.principal)
os.chmod(self.keytab, 0o600)
self.service_user.chown(self.keytab)
def __setup_lightweight_ca_key_retrieval_custodia(self):
logger.debug('Creating Custodia keys')
custodia_basedn = DN(
('cn', 'custodia'), ('cn', 'ipa'), ('cn', 'etc'), api.env.basedn)
ensure_entry(
custodia_basedn,
objectclass=['top', 'nsContainer'],
cn=['custodia'],
)
ensure_entry(
DN(('cn', 'dogtag'), custodia_basedn),
objectclass=['top', 'nsContainer'],
cn=['dogtag'],
)
keyfile = os.path.join(paths.PKI_TOMCAT, self.service_prefix + '.keys')
keystore = IPAKEMKeys({'server_keys': keyfile})
keystore.generate_keys(self.service_prefix)
os.chmod(keyfile, 0o600)
self.service_user.chown(keyfile)
def __remove_lightweight_ca_key_retrieval_custodia(self):
keyfile = os.path.join(paths.PKI_TOMCAT,
self.service_prefix + '.keys')
keystore = IPAKEMKeys({'server_keys': keyfile})
# Call remove_server_keys_file explicitly to ensure that the key
# file is always removed.
keystore.remove_server_keys_file()
try:
keystore.remove_keys(self.service_prefix)
except (ldap.CONNECT_ERROR, ldap.SERVER_DOWN):
logger.debug(
"Cannot remove custodia keys now, server_del takes care of "
"them later."
)
def add_lightweight_ca_tracking_requests(self):
try:
lwcas = api.Backend.ldap2.get_entries(
base_dn=api.env.basedn,
filter='(objectclass=ipaca)',
attrs_list=['cn', 'ipacaid'],
)
add_lightweight_ca_tracking_requests(lwcas)
except errors.NotFound:
# shouldn't happen, but don't fail if it does
logger.warning(
"Did not find any lightweight CAs; nothing to track")
def __dogtag10_migration(self):
self._ldap_update(['50-dogtag10-migration.update'])
def is_crlgen_enabled(self):
"""Check if the local CA instance is generating CRL
Three conditions must be met to consider that the local CA is CRL
generation master:
- in CS.cfg ca.crl.MasterCRL.enableCRLCache=true
- in CS.cfg ca.crl.MasterCRL.enableCRLUpdates=true
- in /etc/httpd/conf.d/ipa-pki-proxy.conf the RewriteRule
^/ipa/crl/MasterCRL.bin is disabled (commented or removed)
If the values are inconsistent, an exception is raised
:returns: True/False
:raises: InconsistentCRLGenConfigException if the config is
inconsistent
"""
try:
cache = directivesetter.get_directive(
self.config, 'ca.crl.MasterCRL.enableCRLCache', '=')
enableCRLCache = cache.lower() == 'true'
updates = directivesetter.get_directive(
self.config, 'ca.crl.MasterCRL.enableCRLUpdates', '=')
enableCRLUpdates = updates.lower() == 'true'
# If the values are different, the config is inconsistent
if enableCRLCache != enableCRLUpdates:
raise InconsistentCRLGenConfigException(
"Configuration is inconsistent, please check "
"ca.crl.MasterCRL.enableCRLCache and "
"ca.crl.MasterCRL.enableCRLUpdates in {} and "
"run ipa-crlgen-manage [enable|disable] to repair".format(
self.config))
except IOError:
raise RuntimeError(
"Unable to read {}".format(self.config))
# At this point enableCRLCache and enableCRLUpdates have the same value
try:
rewriteRuleDisabled = True
p = re.compile(self.crl_rewrite_pattern)
with open(paths.HTTPD_IPA_PKI_PROXY_CONF) as f:
for line in f.readlines():
if p.search(line):
rewriteRuleDisabled = False
break
except IOError:
raise InconsistentCRLGenConfigException(
"Unable to read {}".format(paths.HTTPD_IPA_PKI_PROXY_CONF))
# if enableCRLUpdates and rewriteRuleDisabled are different, the config
# is inconsistent
if enableCRLUpdates != rewriteRuleDisabled:
raise InconsistentCRLGenConfigException(
"Configuration is inconsistent, please check "
"ca.crl.MasterCRL.enableCRLCache in {} and the "
"RewriteRule ^/ipa/crl/MasterCRL.bin in {} and "
"run ipa-crlgen-manage [enable|disable] to repair".format(
self.config, paths.HTTPD_IPA_PKI_PROXY_CONF))
return enableCRLUpdates
def setup_crlgen(self, setup_crlgen):
"""Configure the local host for CRL generation
:param setup_crlgen: if True enable CRL generation, if False, disable
"""
try:
crlgen_enabled = self.is_crlgen_enabled()
if crlgen_enabled == setup_crlgen:
logger.info(
"Nothing to do, CRL generation already %s",
"enabled" if crlgen_enabled else "disabled")
return
except InconsistentCRLGenConfigException:
logger.warning("CRL generation is partially enabled, repairing...")
# Stop PKI
logger.info("Stopping %s", self.service_name)
self.stop_instance()
logger.debug("%s successfully stopped", self.service_name)
# Edit the CS.cfg directives
logger.info("Editing %s", self.config)
with directivesetter.DirectiveSetter(
self.config, quotes=False, separator='=') as ds:
# Convert the bool setup_crlgen to a lowercase string
str_value = str(setup_crlgen).lower()
ds.set('ca.crl.MasterCRL.enableCRLCache', str_value)
ds.set('ca.crl.MasterCRL.enableCRLUpdates', str_value)
# Start pki-tomcat
logger.info("Starting %s", self.service_name)
self.start_instance()
logger.debug("%s successfully started", self.service_name)
# Edit the RewriteRule
def comment_rewriterule():
logger.info("Editing %s", paths.HTTPD_IPA_PKI_PROXY_CONF)
# look for the pattern RewriteRule ^/ipa/crl/MasterCRL.bin ..
# and comment out
p = re.compile(self.crl_rewrite_pattern, re.MULTILINE)
with open(paths.HTTPD_IPA_PKI_PROXY_CONF) as f:
content = f.read()
new_content = p.sub(r"#\1", content)
with open(paths.HTTPD_IPA_PKI_PROXY_CONF, 'w') as f:
f.write(new_content)
def uncomment_rewriterule():
logger.info("Editing %s", paths.HTTPD_IPA_PKI_PROXY_CONF)
# check if the pattern RewriteRule ^/ipa/crl/MasterCRL.bin ..
# is already present
present = False
p = re.compile(self.crl_rewrite_pattern, re.MULTILINE)
with open(paths.HTTPD_IPA_PKI_PROXY_CONF) as f:
content = f.read()
present = p.search(content)
# Remove the comment
p_comment = re.compile(self.crl_rewrite_comment, re.MULTILINE)
new_content = p_comment.sub("", content)
# If not already present, add RewriteRule
if not present:
new_content += self.crl_rewriterule.format(api.env.host)
# Finally write the file
with open(paths.HTTPD_IPA_PKI_PROXY_CONF, 'w') as f:
f.write(new_content)
try:
if setup_crlgen:
comment_rewriterule()
else:
uncomment_rewriterule()
except IOError:
raise RuntimeError(
"Unable to access {}".format(paths.HTTPD_IPA_PKI_PROXY_CONF))
# Restart httpd
http_service = services.knownservices.httpd
logger.info("Restarting %s", http_service.service_name)
http_service.restart()
logger.debug("%s successfully restarted", http_service.service_name)
# make sure a CRL is generated if setup_crl is True
if setup_crlgen:
logger.info("Forcing CRL update")
api.Backend.ra.override_port = 8443
result = api.Backend.ra.updateCRL(wait='true')
if result.get('crlUpdate', 'Failure') == 'Success':
logger.debug("Successfully updated CRL")
api.Backend.ra.override_port = None
@staticmethod
def acme_uid(fqdn: str) -> str:
"""Compute ACME RA account uid."""
return f'acme-{fqdn}'
def setup_acme(self) -> bool:
"""
Set up ACME service, if needed.
Return False if ACME service was already set up, otherwise True.
"""
# ACME LDAP database schema will be added by ipa-server-upgrade.
# It is fine if this subroutine runs *before* the schema update,
# because we only create the container objects.
if os.path.isdir(os.path.join(paths.PKI_TOMCAT, 'acme')):
logger.debug('ACME service is already deployed')
return False
if not minimum_acme_support():
return False
self._ldap_mod('/usr/share/pki/acme/database/ds/schema.ldif')
configure_acme_acls()
# create ACME agent group (if not exist already) and user
self.ensure_group(ACME_AGENT_GROUP, "ACME RA accounts")
acme_user = self.acme_uid(self.fqdn)
result = self.create_user(
uid=acme_user,
cn=acme_user,
sn=acme_user,
user_type='agentType',
groups=[ACME_AGENT_GROUP],
force=True,
)
if result is None:
raise RuntimeError("Failed to add ACME RA user")
else:
password = result
# Add the IPA RA user as a member of the ACME admins for
# ipa-acme-manage.
user_dn = DN(('uid', "ipara"), ('ou', 'People'), self.basedn)
conn = api.Backend.ldap2
group_dn = DN(('cn', ACME_AGENT_GROUP), ('ou', 'groups'),
self.basedn)
try:
conn.add_entry_to_group(user_dn, group_dn, 'uniqueMember')
except errors.AlreadyGroupMember:
pass
# create container object heirarchy in LDAP
ensure_acme_containers()
# create ACME service instance
ipautil.run(['pki-server', 'acme-create'])
# write configuration files
files = [
('pki-acme-configsources.conf.template',
paths.PKI_ACME_CONFIGSOURCES_CONF),
('pki-acme-database.conf.template', paths.PKI_ACME_DATABASE_CONF),
('pki-acme-engine.conf.template', paths.PKI_ACME_ENGINE_CONF),
('pki-acme-issuer.conf.template', paths.PKI_ACME_ISSUER_CONF),
('pki-acme-realm.conf.template', paths.PKI_ACME_REALM_CONF),
]
sub_dict = dict(
FQDN=self.fqdn,
USER=acme_user,
PASSWORD=password,
)
for template_name, target in files:
template_filename = \
os.path.join(paths.USR_SHARE_IPA_DIR, template_name)
filled = ipautil.template_file(template_filename, sub_dict)
with open(target, 'w') as f:
f.write(filled)
os.fchmod(f.fileno(), 0o600)
self.service_user.chown(f.fileno())
# deploy ACME Tomcat application
ipautil.run(['pki-server', 'acme-deploy'])
return True
def __update_entry_from_cert(make_filter, make_entry, cert):
"""
Given a certificate and functions to make a filter based on the
cert, and make a new entry based on the cert, update database
accordingly.
:param make_filter:
function that takes a certificate in DER format and
returns an LDAP search filter
:param make_entry:
function that takes a certificate in DER format and an
LDAP entry, and returns the new state of the LDAP entry.
Return the input unchanged to skip an entry.
:param cert:
An IPACertificate object
Logging is done via syslog.
Return ``True`` if all updates were successful (zero updates is
vacuously successful) otherwise ``False``.
"""
base_dn = DN(('o', 'ipaca'))
conn = api.Backend.ldap2
attempts = 0
updated = False
while attempts < 10:
try:
db_filter = make_filter(cert)
try:
entries = conn.get_entries(base_dn, conn.SCOPE_SUBTREE, db_filter)
except errors.NotFound:
entries = []
updated = True
for entry in entries:
syslog.syslog(
syslog.LOG_NOTICE, 'Updating entry %s' % str(entry.dn))
try:
entry = make_entry(cert, entry)
conn.update_entry(entry)
except errors.EmptyModlist:
pass
except Exception as e:
syslog.syslog(
syslog.LOG_ERR,
'Updating entry %s failed: %s' % (str(entry.dn), e))
updated = False
break
except errors.NetworkError:
syslog.syslog(
syslog.LOG_ERR,
'Connection to %s failed, sleeping 30s' % api.env.ldap_uri)
time.sleep(30)
attempts += 1
except Exception as e:
syslog.syslog(syslog.LOG_ERR, 'Caught unhandled exception: %s' % e)
break
if not updated:
syslog.syslog(syslog.LOG_ERR, 'Update failed.')
return False
return True
def update_people_entry(cert):
"""
Update the userCerticate for an entry in the dogtag ou=People. This
is needed when a certificate is renewed.
"""
def make_filter(cert):
ldap = api.Backend.ldap2
subject = DN(cert.subject)
issuer = DN(cert.issuer)
return ldap.combine_filters(
[
ldap.make_filter({'objectClass': 'inetOrgPerson'}),
ldap.make_filter(
{'description': ';%s;%s' % (issuer, subject)},
exact=False, trailing_wildcard=False),
],
ldap.MATCH_ALL)
def make_entry(cert, entry):
serial_number = cert.serial_number
subject = DN(cert.subject)
issuer = DN(cert.issuer)
entry['usercertificate'].append(cert)
entry['description'] = '2;%d;%s;%s' % (serial_number, issuer, subject)
return entry
return __update_entry_from_cert(make_filter, make_entry, cert)
def update_authority_entry(cert):
"""
Find the authority entry for the given cert, and update the
serial number to match the given cert.
"""
def make_filter(cert):
ldap = api.Backend.ldap2
subject = str(DN(cert.subject))
return ldap.make_filter(
dict(objectclass='authority', authoritydn=subject),
rules=ldap.MATCH_ALL,
)
def make_entry(cert, entry):
entry['authoritySerial'] = cert.serial_number
return entry
return __update_entry_from_cert(make_filter, make_entry, cert)
def get_ca_renewal_nickname(subject_base, ca_subject_dn, sdn):
"""
Get the nickname for storage in the cn_renewal container.
:param subject_base: Certificate subject base
:param ca_subject_dn: IPA CA subject DN
:param sdn: Subject DN
:return: string, or None if nickname cannot be determined.
"""
assert isinstance(sdn, DN)
nickname_by_subject_dn = {
DN(ca_subject_dn): 'caSigningCert cert-pki-ca',
DN('CN=CA Audit', subject_base): 'auditSigningCert cert-pki-ca',
DN('CN=OCSP Subsystem', subject_base): 'ocspSigningCert cert-pki-ca',
DN('CN=CA Subsystem', subject_base): 'subsystemCert cert-pki-ca',
DN('CN=KRA Audit', subject_base): 'auditSigningCert cert-pki-kra',
DN('CN=KRA Transport Certificate', subject_base):
'transportCert cert-pki-kra',
DN('CN=KRA Storage Certificate', subject_base):
'storageCert cert-pki-kra',
DN('CN=IPA RA', subject_base): 'ipaCert',
}
return nickname_by_subject_dn.get(sdn)
def update_ca_renewal_entry(conn, nickname, cert):
"""
Update the ca_renewal entry for the given nickname.
:param conn: A *connected* LDAP handle
:param nickname: NSSDB nickname
:param cert: python-cryptography X509Certificate
"""
dn = DN(('cn', nickname), api.env.container_ca_renewal, api.env.basedn)
try:
entry = conn.get_entry(dn, ['usercertificate'])
entry['usercertificate'] = [cert]
conn.update_entry(entry)
except errors.NotFound:
entry = conn.make_entry(
dn,
objectclass=['top', 'pkiuser', 'nscontainer'],
cn=[nickname],
usercertificate=[cert])
conn.add_entry(entry)
except errors.EmptyModlist:
pass
def ensure_ldap_profiles_container():
ensure_entry(
PROFILES_DN,
objectclass=['top', 'organizationalUnit'],
ou=['certificateProfiles'],
)
def ensure_lightweight_cas_container():
return ensure_entry(
DN(('ou', 'authorities'), ('ou', 'ca'), ('o', 'ipaca')),
objectclass=['top', 'organizationalUnit'],
ou=['authorities'],
)
def minimum_acme_support(data=None):
"""
ACME with global enable/disable is required.
This first shipped in dogtag version 10.10.0.
Parse the version string to determine if the minimum version
is met. If parsing fails return False.
:param: data: The string value to parse for version. Defaults to
reading from the filesystem.
"""
if not data:
with open('/usr/share/pki/VERSION', 'r') as fd:
data = fd.read()
groups = re.match(r'.*\nSpecification-Version: ([\d+\.]*)\n.*', data)
if groups:
version_string = groups.groups(0)[0]
minimum_version = parse_version('10.10.0')
return parse_version(version_string) >= minimum_version
else:
logger.debug('Unable to parse version from %s', data)
return False
def ensure_acme_containers():
"""
Create the ACME container objects under ou=acme,o=ipaca if
they do not exist.
"""
ou_acme = RDN(('ou', 'acme'))
rdns = [
DN(ou_acme),
DN(('ou', 'nonces'), ou_acme),
DN(('ou', 'accounts'), ou_acme),
DN(('ou', 'orders'), ou_acme),
DN(('ou', 'authorizations'), ou_acme),
DN(('ou', 'challenges'), ou_acme),
DN(('ou', 'certificates'), ou_acme),
]
extensible_rdns = [
DN(('ou', 'config'), ou_acme),
]
for rdn in rdns:
ensure_entry(
DN(rdn, ('o', 'ipaca')),
objectclass=['top', 'organizationalUnit'],
ou=[rdn[0][0].value],
)
for rdn in extensible_rdns:
ensure_entry(
DN(rdn, ('o', 'ipaca')),
objectclass=['top', 'organizationalUnit', 'extensibleObject'],
ou=[rdn[0][0].value],
)
def ensure_entry(dn, **attrs):
"""Ensure an entry exists.
If an entry with the given DN already exists, return ``False``,
otherwise add the entry and return ``True``.
"""
conn = api.Backend.ldap2
try:
conn.get_entry(dn)
return False
except errors.NotFound:
# entry doesn't exist; add it
entry = conn.make_entry(dn, **attrs)
conn.add_entry(entry)
return True
def configure_profiles_acl():
"""Allow the Certificate Manager Agents group to modify profiles."""
new_rules = [
'certServer.profile.configuration:read,modify' +
':allow (read,modify) group="Certificate Manager Agents"' +
':Certificate Manager agents may modify (create/update/delete) ' +
'and read profiles',
'certServer.ca.account:login,logout' +
':allow (login,logout) user="anybody"' +
':Anybody can login and logout',
]
return __add_acls(new_rules)
def configure_lightweight_ca_acls():
"""Allow Certificate Manager Agents to manage lightweight CAs."""
new_rules = [
'certServer.ca.authorities:list,read' +
':allow (list,read) user="anybody"' +
':Anybody may list and read lightweight authorities',
'certServer.ca.authorities:create,modify' +
':allow (create,modify) group="Administrators"' +
':Administrators may create and modify lightweight authorities',
'certServer.ca.authorities:delete' +
':allow (delete) group="Administrators"' +
':Administrators may delete lightweight authorities',
'certServer.ca.authorities:create,modify,delete' +
':allow (create,modify,delete) group="Certificate Manager Agents"' +
':Certificate Manager Agents may manage lightweight authorities',
]
return __add_acls(new_rules)
def configure_acme_acls():
"""Allow the ACME Agents to modify profiles."""
# The "execute" operation sounds scary, but it actually only allows
# revocation and unrevocation. See CertResource.java and
# base/ca/shared/conf/acl.properties in the Dogtag source.
new_rules = [
'certServer.ca.certs:execute'
f':allow (execute) group="{ACME_AGENT_GROUP}"'
':ACME Agents may execute cert operations',
]
return __add_acls(new_rules)
def __add_acls(new_rules):
"""Add the given Dogtag ACLs.
``new_rules``
Iterable of ACL rule values to add
Return ``True`` if any ACLs were added otherwise ``False``.
"""
updated = False
dn = DN(('cn', 'aclResources'), ('o', 'ipaca'))
conn = api.Backend.ldap2
entry = conn.get_entry(dn)
cur_rules = entry.get('resourceACLS', [])
add_rules = [rule for rule in new_rules if rule not in cur_rules]
if add_rules:
cur_rules.extend(add_rules)
conn.update_entry(entry)
updated = True
return updated
def __get_profile_config(profile_id):
sub_dict = dict(
DOMAIN=ipautil.format_netloc(api.env.domain),
IPA_CA_RECORD=ipalib.constants.IPA_CA_RECORD,
CRL_ISSUER='CN=Certificate Authority,o=ipaca',
SUBJECT_DN_O=dsinstance.DsInstance().find_subject_base(),
ACME_AGENT_GROUP=ACME_AGENT_GROUP,
)
# To work around lack of proper profile upgrade system, we ship
# two versions of some profiles - one for new installs only, and
# the other for upgrading to LDAP-based profiles in an existing
# deployment.
#
# Select UPGRADE version if we are in the 'updates' API context
# and an upgrade-specific version of the profile exists.
#
profile_filename = '/usr/share/ipa/profiles/{}.cfg'.format(profile_id)
profile_upg_filename = \
'/usr/share/ipa/profiles/{}.UPGRADE.cfg'.format(profile_id)
if api.env.context == 'updates' and os.path.isfile(profile_upg_filename):
profile_filename = profile_upg_filename
return ipautil.template_file(profile_filename, sub_dict)
def import_included_profiles():
conn = api.Backend.ldap2
ensure_entry(
DN(('cn', 'ca'), api.env.basedn),
objectclass=['top', 'nsContainer'],
cn=['ca'],
)
ensure_entry(
DN(api.env.container_certprofile, api.env.basedn),
objectclass=['top', 'nsContainer'],
cn=['certprofiles'],
)
api.Backend.ra_certprofile.override_port = 8443
for (profile_id, desc, store_issued) in dogtag.INCLUDED_PROFILES:
dn = DN(('cn', profile_id),
api.env.container_certprofile, api.env.basedn)
try:
conn.get_entry(dn)
except errors.NotFound:
# profile not found; add it
entry = conn.make_entry(
dn,
objectclass=['ipacertprofile'],
cn=[profile_id],
description=[desc],
ipacertprofilestoreissued=['TRUE' if store_issued else 'FALSE'],
)
conn.add_entry(entry)
# Create the profile, replacing any existing profile of same name
profile_data = __get_profile_config(profile_id)
_create_dogtag_profile(profile_id, profile_data, overwrite=True)
logger.debug("Imported profile '%s'", profile_id)
else:
logger.info(
"Profile '%s' is already in LDAP; skipping", profile_id
)
api.Backend.ra_certprofile.override_port = None
def repair_profile_caIPAserviceCert():
"""
A regression caused replica installation to replace the FreeIPA
version of caIPAserviceCert with the version shipped by Dogtag.
This function detects and repairs occurrences of this problem.
"""
api.Backend.ra_certprofile.override_port = 8443
profile_id = 'caIPAserviceCert'
with api.Backend.ra_certprofile as profile_api:
try:
cur_config = profile_api.read_profile(profile_id).splitlines()
except errors.RemoteRetrieveError:
# no profile there to check/repair
api.Backend.ra_certprofile.override_port = None
return
indicators = [
(
b"policyset.serverCertSet.1.default.params.name="
b"CN=$request.req_subject_name.cn$, OU=pki-ipa, O=IPA "
),
(
b"policyset.serverCertSet.9.default.params."
b"crlDistPointsPointName_0="
b"https://ipa.example.com/ipa/crl/MasterCRL.bin"
),
]
need_repair = all(l in cur_config for l in indicators)
if need_repair:
logger.debug(
"Detected that profile '%s' has been replaced with "
"incorrect version; begin repair.", profile_id)
_create_dogtag_profile(
profile_id, __get_profile_config(profile_id), overwrite=True)
logger.debug("Repair of profile '%s' complete.", profile_id)
api.Backend.ra_certprofile.override_port = None
def migrate_profiles_to_ldap():
"""Migrate profiles from filesystem to LDAP.
This must be run *after* switching to the LDAPProfileSubsystem
and restarting the CA.
The profile might already exist, e.g. if a replica was already
upgraded, so this case is ignored. New/missing profiles are imported
into LDAP. Existing profiles are not modified. This means that they are
neither enabled nor updated when the file on disk has been changed.
"""
ensure_ldap_profiles_container()
api.Backend.ra_certprofile.override_port = 8443
with open(paths.CA_CS_CFG_PATH) as f:
cs_cfg = f.read()
match = re.search(r'^profile\.list=(\S*)', cs_cfg, re.MULTILINE)
profile_ids = match.group(1).split(',')
profile_states = _get_ldap_profile_states()
for profile_id in profile_ids:
state = profile_states.get(profile_id.lower(), ProfileState.MISSING)
if state != ProfileState.MISSING:
# We don't reconsile enabled/disabled state.
logger.info(
"Profile '%s' is already in LDAP and %s; skipping",
profile_id, state.value
)
continue
logger.info("Migrating profile '%s'", profile_id)
match = re.search(
r'^profile\.{}\.config=(\S*)'.format(profile_id),
cs_cfg, re.MULTILINE
)
if match is None:
logger.info("No file for profile '%s'; skipping", profile_id)
continue
filename = match.group(1)
match = re.search(
r'^profile\.{}\.class_id=(\S*)'.format(profile_id),
cs_cfg, re.MULTILINE
)
if match is None:
logger.info("No class_id for profile '%s'; skipping", profile_id)
continue
class_id = match.group(1)
with open(filename) as f:
profile_data = f.read()
if profile_data[-1] != '\n':
profile_data += '\n'
profile_data += 'profileId={}\n'.format(profile_id)
profile_data += 'classId={}\n'.format(class_id)
# Import the profile, but do not replace it if it already exists.
# This prevents replicas from replacing IPA-managed profiles with
# Dogtag default profiles of same name.
#
_create_dogtag_profile(profile_id, profile_data, overwrite=False)
api.Backend.ra_certprofile.override_port = None
class ProfileState(enum.Enum):
MISSING = "missing"
ENABLED = "enabled"
DISABLED = "disabled"
def _get_ldap_profile_states():
"""Get LDAP profile states
The function directly access LDAP for performance reasons. It's much
faster than Dogtag's REST API and it's easier to check profiles for all
subsystems.
:return: mapping of lowercase profile id to state enum member
"""
conn = api.Backend.ldap2
entries = conn.get_entries(
base_dn=PROFILES_DN,
scope=conn.SCOPE_SUBTREE,
filter="(objectClass=certProfile)",
attrs_list=["cn", "certProfileConfig"]
)
results = {}
for entry in entries:
single = entry.single_value
cn = single["cn"]
try:
cfg = single["certProfileConfig"]
except (ValueError, KeyError):
# certProfileConfig is neither mandatory nor single value
# skip entries with incomplete configuration
state = ProfileState.MISSING
else:
if isinstance(cfg, bytes):
# some profile configurations are marked as binary
cfg = cfg.decode("utf-8")
for line in cfg.split("\n"):
if line.lower() == "enable=true":
state = ProfileState.ENABLED
break
else:
state = ProfileState.DISABLED
results[cn.lower()] = state
return results
def _create_dogtag_profile(profile_id, profile_data, overwrite):
with api.Backend.ra_certprofile as profile_api:
# import the profile
try:
profile_api.create_profile(profile_data)
logger.debug("Profile '%s' successfully migrated to LDAP",
profile_id)
except errors.RemoteRetrieveError as e:
logger.debug("Error migrating '%s': %s", profile_id, e)
# profile already exists
if overwrite:
try:
profile_api.disable_profile(profile_id)
except errors.RemoteRetrieveError:
logger.debug(
"Failed to disable profile '%s' "
"(it is probably already disabled)",
profile_id)
profile_api.update_profile(profile_id, profile_data)
# enable the profile
try:
profile_api.enable_profile(profile_id)
except errors.RemoteRetrieveError:
logger.debug(
"Failed to enable profile '%s' "
"(it is probably already enabled)",
profile_id)
def ensure_ipa_authority_entry():
"""Add the IPA CA ipaCa object if missing.
This requires the "host authority" authority entry to have been
created, which Dogtag will do automatically upon startup, if the
ou=authorities,ou=ca,o=ipaca container exists. Therefore, the
``ensure_lightweight_cas_container`` function must be executed,
and Dogtag restarted, before executing this function.
"""
# find out authority id, issuer DN and subject DN of IPA CA
api.Backend.ra_lightweight_ca.override_port = 8443
with api.Backend.ra_lightweight_ca as lwca:
data = lwca.read_ca('host-authority')
attrs = dict(
ipacaid=data['id'],
ipacaissuerdn=data['issuerDN'],
ipacasubjectdn=data['dn'],
)
api.Backend.ra_lightweight_ca.override_port = None
ensure_entry(
DN(api.env.container_ca, api.env.basedn),
objectclass=['top', 'nsContainer'],
cn=['cas'],
)
ensure_entry(
DN(('cn', ipalib.constants.IPA_CA_CN), api.env.container_ca, api.env.basedn),
objectclass=['top', 'ipaca'],
cn=[ipalib.constants.IPA_CA_CN],
description=['IPA CA'],
**attrs
)
def ensure_default_caacl():
"""Add the default CA ACL if missing."""
ensure_entry(
DN(('cn', 'ca'), api.env.basedn),
objectclass=['top', 'nsContainer'],
cn=['ca'],
)
ensure_entry(
DN(api.env.container_caacl, api.env.basedn),
objectclass=['top', 'nsContainer'],
cn=['certprofiles'],
)
if not api.Command.caacl_find()['result']:
api.Command.caacl_add(u'hosts_services_caIPAserviceCert',
hostcategory=u'all', servicecategory=u'all')
api.Command.caacl_add_profile(u'hosts_services_caIPAserviceCert',
certprofile=(u'caIPAserviceCert',))
def add_lightweight_ca_tracking_requests(lwcas):
"""Add tracking requests for the given lightweight CAs.
The entries must have the 'cn' and 'ipacaid' attributes.
The IPA CA, if present, is skipped.
"""
for entry in lwcas:
if ipalib.constants.IPA_CA_CN in entry['cn']:
continue
nickname = "{} {}".format(
ipalib.constants.IPA_CA_NICKNAME,
entry['ipacaid'][0])
criteria = {
'cert-database': paths.PKI_TOMCAT_ALIAS_DIR,
'cert-nickname': nickname,
'ca-name': ipalib.constants.RENEWAL_CA_NAME,
}
request_id = certmonger.get_request_id(criteria)
if request_id is None:
try:
certmonger.start_tracking(
certpath=paths.PKI_TOMCAT_ALIAS_DIR,
pin=certmonger.get_pin(INTERNAL_TOKEN),
nickname=nickname,
ca=ipalib.constants.RENEWAL_CA_NAME,
profile='caCACert',
pre_command='stop_pkicad',
post_command='renew_ca_cert "%s"' % nickname,
)
logger.debug(
'Lightweight CA renewal: '
'added tracking request for "%s"', nickname)
except RuntimeError as e:
logger.error(
'Lightweight CA renewal: Certmonger failed to '
'start tracking certificate: %s', e)
else:
logger.debug(
'Lightweight CA renewal: '
'already tracking certificate "%s"', nickname)
def update_ipa_conf(ca_host=None):
"""
Update IPA configuration file to ensure that RA plugins are enabled and
that CA host points to specified server (or localhost if ca_host=None).
"""
parser = RawConfigParser()
parser.read(paths.IPA_DEFAULT_CONF)
parser.set('global', 'enable_ra', 'True')
parser.set('global', 'ra_plugin', 'dogtag')
parser.set('global', 'dogtag_version', '10')
if ca_host is None:
parser.remove_option('global', 'ca_host')
else:
parser.set('global', 'ca_host', ca_host)
with open(paths.IPA_DEFAULT_CONF, 'w') as f:
parser.write(f)
def import_ra_key(custodia):
custodia.import_ra_key()
CAInstance._set_ra_cert_perms()
CAInstance.configure_agent_renewal()
def check_ipa_ca_san(cert):
"""
Test whether the certificate has an ipa-ca SAN
:param cert: x509.IPACertificate
This SAN is necessary for ACME.
The caller is responsible for initializing the api.
On success returns None, on failure raises ValidationError
"""
expect = f'{ipalib.constants.IPA_CA_RECORD}.' \
f'{ipautil.format_netloc(api.env.domain)}'
try:
cert.match_hostname(expect)
except ssl.CertificateError:
raise errors.ValidationError(
name='certificate',
error='Does not have a \'{}\' SAN'.format(expect)
)
if __name__ == "__main__":
standard_logging_setup("install.log")
ds = dsinstance.DsInstance()
ca = CAInstance("EXAMPLE.COM")
ca.configure_instance("catest.example.com", "password", "password")
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