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#
# Copyright (C) 2014 FreeIPA Contributors see COPYING for license
#
import os
import pwd
import grp
import ldap
from ipaserver.install import service
from ipaserver.install import installutils
from ipapython.ipa_log_manager import root_logger
from ipapython.dn import DN
from ipapython import sysrestore, ipautil, ipaldap
from ipaplatform.constants import constants
from ipaplatform.paths import paths
from ipaplatform import services
from ipalib import errors, api
class ODSExporterInstance(service.Service):
def __init__(self, fstore=None, dm_password=None, ldapi=False,
start_tls=False, autobind=ipaldap.AUTOBIND_ENABLED):
service.Service.__init__(
self, "ipa-ods-exporter",
service_desc="IPA OpenDNSSEC exporter daemon",
dm_password=dm_password,
ldapi=ldapi,
autobind=autobind,
start_tls=start_tls
)
self.dm_password = dm_password
self.ods_uid = None
self.ods_gid = None
self.enable_if_exists = False
if fstore:
self.fstore = fstore
else:
self.fstore = sysrestore.FileStore(paths.SYSRESTORE)
suffix = ipautil.dn_attribute_property('_suffix')
def create_instance(self, fqdn, realm_name):
self.backup_state("enabled", self.is_enabled())
self.backup_state("running", self.is_running())
self.fqdn = fqdn
self.realm = realm_name
self.suffix = ipautil.realm_to_suffix(self.realm)
try:
self.stop()
except Exception:
pass
# get a connection to the DS
self.ldap_connect()
# checking status step must be first
self.step("checking status", self.__check_dnssec_status)
self.step("setting up DNS Key Exporter", self.__setup_key_exporter)
self.step("setting up kerberos principal", self.__setup_principal)
self.step("disabling default signer daemon", self.__disable_signerd)
self.step("starting DNS Key Exporter", self.__start)
self.step("configuring DNS Key Exporter to start on boot", self.__enable)
self.start_creation()
def __check_dnssec_status(self):
ods_enforcerd = services.knownservices.ods_enforcerd
try:
self.ods_uid = pwd.getpwnam(constants.ODS_USER).pw_uid
except KeyError:
raise RuntimeError("OpenDNSSEC UID not found")
try:
self.ods_gid = grp.getgrnam(constants.ODS_GROUP).gr_gid
except KeyError:
raise RuntimeError("OpenDNSSEC GID not found")
def __enable(self):
try:
self.ldap_enable('DNSKeyExporter', self.fqdn, self.dm_password,
self.suffix)
except errors.DuplicateEntry:
root_logger.error("DNSKeyExporter service already exists")
def __setup_key_exporter(self):
installutils.set_directive(paths.SYSCONFIG_IPA_ODS_EXPORTER,
'SOFTHSM2_CONF',
paths.DNSSEC_SOFTHSM2_CONF,
quotes=False, separator='=')
def __setup_principal(self):
assert self.ods_uid is not None
for f in [paths.IPA_ODS_EXPORTER_CCACHE, paths.IPA_ODS_EXPORTER_KEYTAB]:
try:
os.remove(f)
except OSError:
pass
dns_exporter_principal = "ipa-ods-exporter/" + self.fqdn + "@" + self.realm
installutils.kadmin_addprinc(dns_exporter_principal)
# Store the keytab on disk
installutils.create_keytab(paths.IPA_ODS_EXPORTER_KEYTAB, dns_exporter_principal)
p = self.move_service(dns_exporter_principal)
if p is None:
# the service has already been moved, perhaps we're doing a DNS reinstall
dns_exporter_principal_dn = DN(
('krbprincipalname', dns_exporter_principal),
('cn', 'services'), ('cn', 'accounts'), self.suffix)
else:
dns_exporter_principal_dn = p
# Make sure access is strictly reserved to the ods user
os.chmod(paths.IPA_ODS_EXPORTER_KEYTAB, 0o440)
os.chown(paths.IPA_ODS_EXPORTER_KEYTAB, 0, self.ods_gid)
dns_group = DN(('cn', 'DNS Servers'), ('cn', 'privileges'),
('cn', 'pbac'), self.suffix)
mod = [(ldap.MOD_ADD, 'member', dns_exporter_principal_dn)]
try:
self.admin_conn.modify_s(dns_group, mod)
except ldap.TYPE_OR_VALUE_EXISTS:
pass
except Exception as e:
root_logger.critical("Could not modify principal's %s entry: %s"
% (dns_exporter_principal_dn, str(e)))
raise
# limit-free connection
mod = [(ldap.MOD_REPLACE, 'nsTimeLimit', '-1'),
(ldap.MOD_REPLACE, 'nsSizeLimit', '-1'),
(ldap.MOD_REPLACE, 'nsIdleTimeout', '-1'),
(ldap.MOD_REPLACE, 'nsLookThroughLimit', '-1')]
try:
self.admin_conn.modify_s(dns_exporter_principal_dn, mod)
except Exception as e:
root_logger.critical("Could not set principal's %s LDAP limits: %s"
% (dns_exporter_principal_dn, str(e)))
raise
def __disable_signerd(self):
signerd_service = services.knownservices.ods_signerd
if self.get_state("singerd_running") is None:
self.backup_state("singerd_running", signerd_service.is_running())
if self.get_state("singerd_enabled") is None:
self.backup_state("singerd_enabled", signerd_service.is_enabled())
# disable default opendnssec signer daemon
signerd_service.stop()
signerd_service.mask()
def __start(self):
self.start()
def remove_service(self):
dns_exporter_principal = ("ipa-ods-exporter/%s@%s" % (self.fqdn,
self.realm))
try:
api.Command.service_del(dns_exporter_principal)
except errors.NotFound:
pass
def uninstall(self):
if not self.is_configured():
return
self.print_msg("Unconfiguring %s" % self.service_name)
# just eat states
self.restore_state("running")
self.restore_state("enabled")
# stop and disable service (IPA service, we do not need it anymore)
self.disable()
self.stop()
# restore state of dnssec default signer daemon
signerd_enabled = self.restore_state("singerd_enabled")
signerd_running = self.restore_state("singerd_running")
signerd_service = services.knownservices.ods_signerd
signerd_service.unmask()
# service was stopped and disabled by setup
if signerd_enabled:
signerd_service.enable()
if signerd_running:
signerd_service.start()
installutils.remove_keytab(paths.IPA_ODS_EXPORTER_KEYTAB)
installutils.remove_ccache(ccache_path=paths.IPA_ODS_EXPORTER_CCACHE)
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