# # Copyright (C) 2014 FreeIPA Contributors see COPYING for license # import os import pwd import grp import stat import shutil from subprocess import CalledProcessError 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, p11helper from ipaplatform import services from ipaplatform.constants import constants from ipaplatform.paths import paths from ipalib import errors, api from ipaserver.install import dnskeysyncinstance KEYMASTER = u'dnssecKeyMaster' softhsm_slot = 0 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': dnskeysyncinstance.softhsm_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: root_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: root_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( ipautil.SHARE_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( ipautil.SHARE_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) 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_slot, pin, paths.LIBSOFTHSM2_SO) try: # generate master key root_logger.debug("Creating master key") p11helper.generate_master_key(p11) # change tokens mod/owner root_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: root_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_KSMUTIL, 'zonelist', 'export'] result = ipautil.run(cmd, runas=constants.ODS_USER, capture_output=True) with open(paths.OPENDNSSEC_ZONELIST_FILE, 'w') as zonelistf: zonelistf.write(result.output) os.chown(paths.OPENDNSSEC_ZONELIST_FILE, self.ods_uid, self.ods_gid) os.chmod(paths.OPENDNSSEC_ZONELIST_FILE, 0o660) else: # initialize new kasp.db command = [ paths.ODS_KSMUTIL, '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') 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 ipautil.file_exists(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: root_logger.error("DNSSEC data export failed") try: shutil.copy(paths.OPENDNSSEC_KASP_DB, paths.IPA_KASP_DB_BACKUP) except IOError as e: root_logger.error( "Unable to backup OpenDNSSEC database %s, " "restore will be skipped: %s", paths.OPENDNSSEC_KASP_DB, e) else: root_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: root_logger.debug(error) self.restore_state("kasp_db_configured") # just eat state # disabled by default, by ldap_enable() if enabled: self.enable() if running: self.restart()