/usr/lib/python2.7/dist-packages/ipaserver/install/opendnssecinstance.py is in python-ipaserver 4.7.0~pre1+git20180411-2ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 | #
# Copyright (C) 2014 FreeIPA Contributors see COPYING for license
#
import logging
import os
import pwd
import grp
import stat
import shutil
from subprocess import CalledProcessError
from ipalib.install import sysrestore
from ipaserver.install import service
from ipaserver.install import installutils
from ipapython.dn import DN
from ipapython import ipautil
from ipaplatform import services
from ipaplatform.constants import constants
from ipaplatform.paths import paths
from ipalib import errors, api
from ipaserver import p11helper
from ipalib.constants import SOFTHSM_DNSSEC_TOKEN_LABEL
logger = logging.getLogger(__name__)
KEYMASTER = u'dnssecKeyMaster'
def get_dnssec_key_masters(conn):
"""
This method can be used only for admin connections, common users do not
have permission to access content of service containers.
:return: list of active dnssec key masters
"""
assert conn is not None
# please check ipalib/dns.py:dnssec_installed() method too, if you do
# any modifications here
dn = DN(api.env.container_masters, api.env.basedn)
filter_attrs = {
u'cn': u'DNSSEC',
u'objectclass': u'ipaConfigObject',
u'ipaConfigString': [KEYMASTER, u'enabledService'],
}
only_masters_f = conn.make_filter(filter_attrs, rules=conn.MATCH_ALL)
try:
entries = conn.find_entries(filter=only_masters_f, base_dn=dn)
except errors.NotFound:
return []
keymasters_list = []
for entry in entries[0]:
keymasters_list.append(str(entry.dn[1].value))
return keymasters_list
class OpenDNSSECInstance(service.Service):
def __init__(self, fstore=None):
service.Service.__init__(
self, "ods-enforcerd",
service_desc="OpenDNSSEC enforcer daemon",
)
self.ods_uid = None
self.ods_gid = None
self.conf_file_dict = {
'SOFTHSM_LIB': paths.LIBSOFTHSM2_SO,
'TOKEN_LABEL': SOFTHSM_DNSSEC_TOKEN_LABEL,
'KASP_DB': paths.OPENDNSSEC_KASP_DB,
'ODS_USER': constants.ODS_USER,
'ODS_GROUP': constants.ODS_GROUP,
}
self.kasp_file_dict = {}
self.extra_config = [KEYMASTER]
if fstore:
self.fstore = fstore
else:
self.fstore = sysrestore.FileStore(paths.SYSRESTORE)
suffix = ipautil.dn_attribute_property('_suffix')
def get_masters(self):
return get_dnssec_key_masters(api.Backend.ldap2)
def create_instance(self, fqdn, realm_name, generate_master_key=True,
kasp_db_file=None):
if self.get_state("enabled") is None:
self.backup_state("enabled", self.is_enabled())
if self.get_state("running") is None:
self.backup_state("running", self.is_running())
self.fqdn = fqdn
self.realm = realm_name
self.suffix = ipautil.realm_to_suffix(self.realm)
self.kasp_db_file = kasp_db_file
try:
self.stop()
except Exception:
pass
# checking status must be first
self.step("checking status", self.__check_dnssec_status)
self.step("setting up configuration files", self.__setup_conf_files)
self.step("setting up ownership and file mode bits", self.__setup_ownership_file_modes)
if generate_master_key:
self.step("generating master key", self.__generate_master_key)
self.step("setting up OpenDNSSEC", self.__setup_dnssec)
self.step("setting up ipa-dnskeysyncd", self.__setup_dnskeysyncd)
self.step("starting OpenDNSSEC enforcer", self.__start)
self.step("configuring OpenDNSSEC enforcer to start on boot", self.__enable)
self.start_creation()
def __check_dnssec_status(self):
try:
self.named_uid = pwd.getpwnam(constants.NAMED_USER).pw_uid
except KeyError:
raise RuntimeError("Named UID not found")
try:
self.named_gid = grp.getgrnam(constants.NAMED_GROUP).gr_gid
except KeyError:
raise RuntimeError("Named GID not found")
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('DNSSEC', self.fqdn, None,
self.suffix, self.extra_config)
except errors.DuplicateEntry:
logger.error("DNSSEC service already exists")
# add the KEYMASTER identifier into ipaConfigString
# this is needed for the re-enabled DNSSEC master
dn = DN(('cn', 'DNSSEC'), ('cn', self.fqdn), api.env.container_masters,
api.env.basedn)
try:
entry = api.Backend.ldap2.get_entry(dn, ['ipaConfigString'])
except errors.NotFound as e:
logger.error(
"DNSSEC service entry not found in the LDAP (%s)", e)
else:
config = entry.setdefault('ipaConfigString', [])
if KEYMASTER not in config:
config.append(KEYMASTER)
api.Backend.ldap2.update_entry(entry)
def __setup_conf_files(self):
if not self.fstore.has_file(paths.OPENDNSSEC_CONF_FILE):
self.fstore.backup_file(paths.OPENDNSSEC_CONF_FILE)
if not self.fstore.has_file(paths.OPENDNSSEC_KASP_FILE):
self.fstore.backup_file(paths.OPENDNSSEC_KASP_FILE)
if not self.fstore.has_file(paths.OPENDNSSEC_ZONELIST_FILE):
self.fstore.backup_file(paths.OPENDNSSEC_ZONELIST_FILE)
pin_fd = open(paths.DNSSEC_SOFTHSM_PIN, "r")
pin = pin_fd.read()
pin_fd.close()
# add pin to template
sub_conf_dict = self.conf_file_dict
sub_conf_dict['PIN'] = pin
ods_conf_txt = ipautil.template_file(
os.path.join(paths.USR_SHARE_IPA_DIR, "opendnssec_conf.template"),
sub_conf_dict)
ods_conf_fd = open(paths.OPENDNSSEC_CONF_FILE, 'w')
ods_conf_fd.seek(0)
ods_conf_fd.truncate(0)
ods_conf_fd.write(ods_conf_txt)
ods_conf_fd.close()
ods_kasp_txt = ipautil.template_file(
os.path.join(paths.USR_SHARE_IPA_DIR, "opendnssec_kasp.template"),
self.kasp_file_dict)
ods_kasp_fd = open(paths.OPENDNSSEC_KASP_FILE, 'w')
ods_kasp_fd.seek(0)
ods_kasp_fd.truncate(0)
ods_kasp_fd.write(ods_kasp_txt)
ods_kasp_fd.close()
if not self.fstore.has_file(paths.SYSCONFIG_ODS):
self.fstore.backup_file(paths.SYSCONFIG_ODS)
# create the configfile, opendnssec-enforcer doesn't ship it
open(paths.SYSCONFIG_ODS, 'a').close()
installutils.set_directive(paths.SYSCONFIG_ODS,
'SOFTHSM2_CONF',
paths.DNSSEC_SOFTHSM2_CONF,
quotes=False, separator='=')
def __setup_ownership_file_modes(self):
assert self.ods_uid is not None
assert self.ods_gid is not None
# workarounds for packaging bugs in opendnssec-1.4.5-2.fc20.x86_64
# https://bugzilla.redhat.com/show_bug.cgi?id=1098188
for (root, dirs, files) in os.walk(paths.ETC_OPENDNSSEC_DIR):
for directory in dirs:
dir_path = os.path.join(root, directory)
os.chmod(dir_path, 0o770)
# chown to root:ods
os.chown(dir_path, 0, self.ods_gid)
for filename in files:
file_path = os.path.join(root, filename)
os.chmod(file_path, 0o660)
# chown to root:ods
os.chown(file_path, 0, self.ods_gid)
for (root, dirs, files) in os.walk(paths.VAR_OPENDNSSEC_DIR):
for directory in dirs:
dir_path = os.path.join(root, directory)
os.chmod(dir_path, 0o770)
# chown to ods:ods
os.chown(dir_path, self.ods_uid, self.ods_gid)
for filename in files:
file_path = os.path.join(root, filename)
os.chmod(file_path, 0o660)
# chown to ods:ods
os.chown(file_path, self.ods_uid, self.ods_gid)
def __generate_master_key(self):
with open(paths.DNSSEC_SOFTHSM_PIN, "r") as f:
pin = f.read()
os.environ["SOFTHSM2_CONF"] = paths.DNSSEC_SOFTHSM2_CONF
p11 = p11helper.P11_Helper(
SOFTHSM_DNSSEC_TOKEN_LABEL, pin, paths.LIBSOFTHSM2_SO)
try:
# generate master key
logger.debug("Creating master key")
p11helper.generate_master_key(p11)
# change tokens mod/owner
logger.debug("Changing ownership of token files")
for (root, dirs, files) in os.walk(paths.DNSSEC_TOKENS_DIR):
for directory in dirs:
dir_path = os.path.join(root, directory)
os.chmod(dir_path, 0o770 | stat.S_ISGID)
os.chown(dir_path, self.ods_uid, self.named_gid) # chown to ods:named
for filename in files:
file_path = os.path.join(root, filename)
os.chmod(file_path, 0o770 | stat.S_ISGID)
os.chown(file_path, self.ods_uid, self.named_gid) # chown to ods:named
finally:
p11.finalize()
def __setup_dnssec(self):
# run once only
if self.get_state("kasp_db_configured") and not self.kasp_db_file:
logger.debug("Already configured, skipping step")
return
self.backup_state("kasp_db_configured", True)
if not self.fstore.has_file(paths.OPENDNSSEC_KASP_DB):
self.fstore.backup_file(paths.OPENDNSSEC_KASP_DB)
if self.kasp_db_file:
# copy user specified kasp.db to proper location and set proper
# privileges
shutil.copy(self.kasp_db_file, paths.OPENDNSSEC_KASP_DB)
os.chown(paths.OPENDNSSEC_KASP_DB, self.ods_uid, self.ods_gid)
os.chmod(paths.OPENDNSSEC_KASP_DB, 0o660)
# regenerate zonelist.xml
cmd = [paths.ODS_ENFORCER, 'zonelist', 'export']
result = ipautil.run(cmd,
runas=constants.ODS_USER,
capture_output=True)
else:
# initialize new kasp.db
command = [
paths.ODS_ENFORCER_SETUP,
'setup'
]
ipautil.run(command, stdin="y", runas=constants.ODS_USER)
def __setup_dnskeysyncd(self):
# set up dnskeysyncd this is DNSSEC master
installutils.set_directive(paths.SYSCONFIG_IPA_DNSKEYSYNCD,
'ISMASTER',
'1',
quotes=False, separator='=')
def __start(self):
self.restart() # needed to reload conf files
def uninstall(self):
if not self.is_configured():
return
self.print_msg("Unconfiguring %s" % self.service_name)
running = self.restore_state("running")
enabled = self.restore_state("enabled")
# stop DNSSEC services before backing up kasp.db
try:
self.stop()
except Exception:
pass
ods_exporter = services.service('ipa-ods-exporter', api)
try:
ods_exporter.stop()
except Exception:
pass
# remove directive from ipa-dnskeysyncd, this server is not DNSSEC
# master anymore
installutils.set_directive(paths.SYSCONFIG_IPA_DNSKEYSYNCD,
'ISMASTER', None,
quotes=False, separator='=')
restore_list = [paths.OPENDNSSEC_CONF_FILE, paths.OPENDNSSEC_KASP_FILE,
paths.SYSCONFIG_ODS, paths.OPENDNSSEC_ZONELIST_FILE]
if os.path.isfile(paths.OPENDNSSEC_KASP_DB):
# force to export data
cmd = [paths.IPA_ODS_EXPORTER, 'ipa-full-update']
try:
self.print_msg("Exporting DNSSEC data before uninstallation")
ipautil.run(cmd, runas=constants.ODS_USER)
except CalledProcessError:
logger.error("DNSSEC data export failed")
try:
shutil.copy(paths.OPENDNSSEC_KASP_DB,
paths.IPA_KASP_DB_BACKUP)
except IOError as e:
logger.error(
"Unable to backup OpenDNSSEC database %s, "
"restore will be skipped: %s", paths.OPENDNSSEC_KASP_DB, e)
else:
logger.info("OpenDNSSEC database backed up in %s",
paths.IPA_KASP_DB_BACKUP)
# restore OpenDNSSEC's KASP DB only if backup succeeded
# removing the file without backup could totally break DNSSEC
restore_list.append(paths.OPENDNSSEC_KASP_DB)
for f in restore_list:
try:
self.fstore.restore_file(f)
except ValueError as error:
logger.debug("%s", error)
self.restore_state("kasp_db_configured") # just eat state
# disabled by default, by ldap_enable()
if enabled:
self.enable()
if running:
self.restart()
|