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387 lines
14 KiB
Python
387 lines
14 KiB
Python
#
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# Copyright (C) 2014 FreeIPA Contributors see COPYING for license
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#
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import random
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import os
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import pwd
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import grp
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import stat
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import shutil
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from subprocess import CalledProcessError
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import _ipap11helper
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from ipaserver.install import service
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from ipaserver.install import installutils
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from ipapython.ipa_log_manager import *
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from ipapython.dn import DN
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from ipapython import sysrestore, ipautil, ipaldap, p11helper
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from ipaplatform import services
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from ipaplatform.paths import paths
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from ipalib import errors, api
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from ipaserver.install import dnskeysyncinstance
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KEYMASTER = u'dnssecKeyMaster'
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softhsm_slot = 0
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def get_dnssec_key_masters(conn):
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"""
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This method can be used only for admin connections, common users do not
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have permission to access content of service containers.
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:return: list of active dnssec key masters
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"""
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assert conn is not None
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# please check ipalib/dns.py:dnssec_installed() method too, if you do
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# any modifications here
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dn = DN(api.env.container_masters, api.env.basedn)
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filter_attrs = {
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u'cn': u'DNSSEC',
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u'objectclass': u'ipaConfigObject',
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u'ipaConfigString': [KEYMASTER, u'enabledService'],
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}
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only_masters_f = conn.make_filter(filter_attrs, rules=conn.MATCH_ALL)
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try:
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entries = conn.find_entries(filter=only_masters_f, base_dn=dn)
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except errors.NotFound:
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return []
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keymasters_list = []
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for entry in entries[0]:
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keymasters_list.append(str(entry.dn[1].value))
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return keymasters_list
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class OpenDNSSECInstance(service.Service):
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def __init__(self, fstore=None, dm_password=None, ldapi=False,
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start_tls=False, autobind=ipaldap.AUTOBIND_ENABLED):
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service.Service.__init__(
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self, "ods-enforcerd",
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service_desc="OpenDNSSEC enforcer daemon",
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dm_password=dm_password,
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ldapi=ldapi,
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autobind=autobind,
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start_tls=start_tls
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)
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self.dm_password = dm_password
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self.ods_uid = None
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self.ods_gid = None
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self.conf_file_dict = {
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'SOFTHSM_LIB': paths.LIBSOFTHSM2_SO,
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'TOKEN_LABEL': dnskeysyncinstance.softhsm_token_label,
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'KASP_DB': paths.OPENDNSSEC_KASP_DB,
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}
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self.kasp_file_dict = {}
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self.extra_config = [KEYMASTER]
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if fstore:
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self.fstore = fstore
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else:
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self.fstore = sysrestore.FileStore(paths.SYSRESTORE)
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suffix = ipautil.dn_attribute_property('_suffix')
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def get_masters(self):
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if not self.admin_conn:
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self.ldap_connect()
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return get_dnssec_key_masters(self.admin_conn)
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def create_instance(self, fqdn, realm_name, generate_master_key=True,
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kasp_db_file=None):
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if self.get_state("enabled") is None:
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self.backup_state("enabled", self.is_enabled())
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if self.get_state("running") is None:
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self.backup_state("running", self.is_running())
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self.fqdn = fqdn
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self.realm = realm_name
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self.suffix = ipautil.realm_to_suffix(self.realm)
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self.kasp_db_file = kasp_db_file
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try:
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self.stop()
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except Exception:
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pass
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# get a connection to the DS
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if not self.admin_conn:
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self.ldap_connect()
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# checking status must be first
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self.step("checking status", self.__check_dnssec_status)
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self.step("setting up configuration files", self.__setup_conf_files)
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self.step("setting up ownership and file mode bits", self.__setup_ownership_file_modes)
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if generate_master_key:
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self.step("generating master key", self.__generate_master_key)
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self.step("setting up OpenDNSSEC", self.__setup_dnssec)
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self.step("setting up ipa-dnskeysyncd", self.__setup_dnskeysyncd)
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self.step("starting OpenDNSSEC enforcer", self.__start)
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self.step("configuring OpenDNSSEC enforcer to start on boot", self.__enable)
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self.start_creation()
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def __check_dnssec_status(self):
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named = services.knownservices.named
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ods_enforcerd = services.knownservices.ods_enforcerd
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try:
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self.named_uid = pwd.getpwnam(named.get_user_name()).pw_uid
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except KeyError:
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raise RuntimeError("Named UID not found")
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try:
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self.named_gid = grp.getgrnam(named.get_group_name()).gr_gid
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except KeyError:
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raise RuntimeError("Named GID not found")
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try:
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self.ods_uid = pwd.getpwnam(ods_enforcerd.get_user_name()).pw_uid
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except KeyError:
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raise RuntimeError("OpenDNSSEC UID not found")
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try:
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self.ods_gid = grp.getgrnam(ods_enforcerd.get_group_name()).gr_gid
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except KeyError:
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raise RuntimeError("OpenDNSSEC GID not found")
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def __enable(self):
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try:
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self.ldap_enable('DNSSEC', self.fqdn, self.dm_password,
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self.suffix, self.extra_config)
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except errors.DuplicateEntry:
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root_logger.error("DNSSEC service already exists")
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# add the KEYMASTER identifier into ipaConfigString
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# this is needed for the re-enabled DNSSEC master
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dn = DN(('cn', 'DNSSEC'), ('cn', self.fqdn), api.env.container_masters,
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api.env.basedn)
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try:
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entry = self.admin_conn.get_entry(dn, ['ipaConfigString'])
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except errors.NotFound as e:
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root_logger.error(
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"DNSSEC service entry not found in the LDAP (%s)", e)
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else:
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config = entry.setdefault('ipaConfigString', [])
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if KEYMASTER not in config:
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config.append(KEYMASTER)
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self.admin_conn.update_entry(entry)
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def __setup_conf_files(self):
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if not self.fstore.has_file(paths.OPENDNSSEC_CONF_FILE):
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self.fstore.backup_file(paths.OPENDNSSEC_CONF_FILE)
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if not self.fstore.has_file(paths.OPENDNSSEC_KASP_FILE):
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self.fstore.backup_file(paths.OPENDNSSEC_KASP_FILE)
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if not self.fstore.has_file(paths.OPENDNSSEC_ZONELIST_FILE):
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self.fstore.backup_file(paths.OPENDNSSEC_ZONELIST_FILE)
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pin_fd = open(paths.DNSSEC_SOFTHSM_PIN, "r")
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pin = pin_fd.read()
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pin_fd.close()
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# add pin to template
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sub_conf_dict = self.conf_file_dict
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sub_conf_dict['PIN'] = pin
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ods_conf_txt = ipautil.template_file(
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ipautil.SHARE_DIR + "opendnssec_conf.template", sub_conf_dict)
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ods_conf_fd = open(paths.OPENDNSSEC_CONF_FILE, 'w')
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ods_conf_fd.seek(0)
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ods_conf_fd.truncate(0)
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ods_conf_fd.write(ods_conf_txt)
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ods_conf_fd.close()
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ods_kasp_txt = ipautil.template_file(
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ipautil.SHARE_DIR + "opendnssec_kasp.template", self.kasp_file_dict)
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ods_kasp_fd = open(paths.OPENDNSSEC_KASP_FILE, 'w')
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ods_kasp_fd.seek(0)
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ods_kasp_fd.truncate(0)
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ods_kasp_fd.write(ods_kasp_txt)
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ods_kasp_fd.close()
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if not self.fstore.has_file(paths.SYSCONFIG_ODS):
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self.fstore.backup_file(paths.SYSCONFIG_ODS)
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installutils.set_directive(paths.SYSCONFIG_ODS,
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'SOFTHSM2_CONF',
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paths.DNSSEC_SOFTHSM2_CONF,
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quotes=False, separator='=')
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def __setup_ownership_file_modes(self):
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assert self.ods_uid is not None
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assert self.ods_gid is not None
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# workarounds for packaging bugs in opendnssec-1.4.5-2.fc20.x86_64
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# https://bugzilla.redhat.com/show_bug.cgi?id=1098188
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for (root, dirs, files) in os.walk(paths.ETC_OPENDNSSEC_DIR):
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for directory in dirs:
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dir_path = os.path.join(root, directory)
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os.chmod(dir_path, 0o770)
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# chown to root:ods
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os.chown(dir_path, 0, self.ods_gid)
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for filename in files:
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file_path = os.path.join(root, filename)
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os.chmod(file_path, 0o660)
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# chown to root:ods
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os.chown(file_path, 0, self.ods_gid)
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for (root, dirs, files) in os.walk(paths.VAR_OPENDNSSEC_DIR):
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for directory in dirs:
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dir_path = os.path.join(root, directory)
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os.chmod(dir_path, 0o770)
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# chown to ods:ods
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os.chown(dir_path, self.ods_uid, self.ods_gid)
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for filename in files:
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file_path = os.path.join(root, filename)
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os.chmod(file_path, 0o660)
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# chown to ods:ods
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os.chown(file_path, self.ods_uid, self.ods_gid)
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def __generate_master_key(self):
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with open(paths.DNSSEC_SOFTHSM_PIN, "r") as f:
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pin = f.read()
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os.environ["SOFTHSM2_CONF"] = paths.DNSSEC_SOFTHSM2_CONF
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p11 = _ipap11helper.P11_Helper(softhsm_slot, pin, paths.LIBSOFTHSM2_SO)
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try:
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# generate master key
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root_logger.debug("Creating master key")
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p11helper.generate_master_key(p11)
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# change tokens mod/owner
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root_logger.debug("Changing ownership of token files")
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for (root, dirs, files) in os.walk(paths.DNSSEC_TOKENS_DIR):
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for directory in dirs:
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dir_path = os.path.join(root, directory)
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os.chmod(dir_path, 0o770 | stat.S_ISGID)
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os.chown(dir_path, self.ods_uid, self.named_gid) # chown to ods:named
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for filename in files:
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file_path = os.path.join(root, filename)
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os.chmod(file_path, 0o770 | stat.S_ISGID)
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os.chown(file_path, self.ods_uid, self.named_gid) # chown to ods:named
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finally:
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p11.finalize()
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def __setup_dnssec(self):
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# run once only
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if self.get_state("KASP_DB_configured") and not self.kasp_db_file:
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root_logger.debug("Already configured, skipping step")
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return
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self.backup_state("KASP_DB_configured", True)
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if not self.fstore.has_file(paths.OPENDNSSEC_KASP_DB):
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self.fstore.backup_file(paths.OPENDNSSEC_KASP_DB)
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if self.kasp_db_file:
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# copy user specified kasp.db to proper location and set proper
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# privileges
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shutil.copy(self.kasp_db_file, paths.OPENDNSSEC_KASP_DB)
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os.chown(paths.OPENDNSSEC_KASP_DB, self.ods_uid, self.ods_gid)
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os.chmod(paths.OPENDNSSEC_KASP_DB, 0o660)
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# regenerate zonelist.xml
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ods_enforcerd = services.knownservices.ods_enforcerd
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cmd = [paths.ODS_KSMUTIL, 'zonelist', 'export']
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stdout, stderr, retcode = ipautil.run(cmd,
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runas=ods_enforcerd.get_user_name())
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with open(paths.OPENDNSSEC_ZONELIST_FILE, 'w') as zonelistf:
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zonelistf.write(stdout)
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os.chown(paths.OPENDNSSEC_ZONELIST_FILE,
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self.ods_uid, self.ods_gid)
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os.chmod(paths.OPENDNSSEC_ZONELIST_FILE, 0o660)
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else:
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# initialize new kasp.db
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command = [
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paths.ODS_KSMUTIL,
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'setup'
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]
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ods_enforcerd = services.knownservices.ods_enforcerd
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ipautil.run(command, stdin="y", runas=ods_enforcerd.get_user_name())
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def __setup_dnskeysyncd(self):
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# set up dnskeysyncd this is DNSSEC master
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installutils.set_directive(paths.SYSCONFIG_IPA_DNSKEYSYNCD,
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'ISMASTER',
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'1',
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quotes=False, separator='=')
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def __start(self):
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self.restart() # needed to reload conf files
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def uninstall(self):
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if not self.is_configured():
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return
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self.print_msg("Unconfiguring %s" % self.service_name)
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running = self.restore_state("running")
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enabled = self.restore_state("enabled")
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# stop DNSSEC services before backing up kasp.db
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try:
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self.stop()
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except Exception:
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pass
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ods_exporter = services.service('ipa-ods-exporter')
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try:
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ods_exporter.stop()
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except Exception:
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pass
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# remove directive from ipa-dnskeysyncd, this server is not DNSSEC
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# master anymore
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installutils.set_directive(paths.SYSCONFIG_IPA_DNSKEYSYNCD,
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'ISMASTER', None,
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quotes=False, separator='=')
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restore_list = [paths.OPENDNSSEC_CONF_FILE, paths.OPENDNSSEC_KASP_FILE,
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paths.SYSCONFIG_ODS, paths.OPENDNSSEC_ZONELIST_FILE]
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if ipautil.file_exists(paths.OPENDNSSEC_KASP_DB):
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# force to export data
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ods_enforcerd = services.knownservices.ods_enforcerd
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cmd = [paths.IPA_ODS_EXPORTER, 'ipa-full-update']
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try:
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self.print_msg("Exporting DNSSEC data before uninstallation")
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ipautil.run(cmd, runas=ods_enforcerd.get_user_name())
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except CalledProcessError:
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root_logger.error("DNSSEC data export failed")
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try:
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shutil.copy(paths.OPENDNSSEC_KASP_DB,
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paths.IPA_KASP_DB_BACKUP)
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except IOError as e:
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root_logger.error(
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"Unable to backup OpenDNSSEC database %s, "
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"restore will be skipped: %s", paths.OPENDNSSEC_KASP_DB, e)
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else:
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root_logger.info("OpenDNSSEC database backed up in %s",
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paths.IPA_KASP_DB_BACKUP)
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# restore OpenDNSSEC's KASP DB only if backup succeeded
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# removing the file without backup could totally break DNSSEC
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restore_list.append(paths.OPENDNSSEC_KASP_DB)
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for f in restore_list:
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try:
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self.fstore.restore_file(f)
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except ValueError as error:
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root_logger.debug(error)
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pass
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# disabled by default, by ldap_enable()
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if enabled:
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self.enable()
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if running:
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self.restart()
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