# Authors: Karl MacMillan # # Copyright (C) 2007 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 . # from __future__ import absolute_import import logging import sys import os import pwd import socket import time import traceback import tempfile import warnings import six from ipalib.install import certstore, sysrestore from ipapython import ipautil from ipapython.dn import DN from ipapython import kerberos from ipalib import api, errors, x509 from ipaplatform import services from ipaplatform.paths import paths from ipaserver.masters import ( CONFIGURED_SERVICE, ENABLED_SERVICE, SERVICE_LIST ) logger = logging.getLogger(__name__) if six.PY3: unicode = str def print_msg(message, output_fd=sys.stdout): logger.debug("%s", message) output_fd.write(message) output_fd.write("\n") output_fd.flush() def format_seconds(seconds): """Format a number of seconds as an English minutes+seconds message""" parts = [] minutes, seconds = divmod(seconds, 60) if minutes: parts.append('%d minute' % minutes) if minutes != 1: parts[-1] += 's' if seconds or not minutes: parts.append('%d second' % seconds) if seconds != 1: parts[-1] += 's' return ' '.join(parts) def add_principals_to_group(admin_conn, group, member_attr, principals): """Add principals to a GroupOfNames LDAP group admin_conn -- LDAP connection with admin rights group -- DN of the group member_attr -- attribute to represent members principals -- list of DNs to add as members """ try: current = admin_conn.get_entry(group) members = current.get(member_attr, []) if len(members) == 0: current[member_attr] = [] for amember in principals: if not(amember in members): current[member_attr].extend([amember]) admin_conn.update_entry(current) except errors.NotFound: entry = admin_conn.make_entry( group, objectclass=["top", "GroupOfNames"], cn=[group['cn']], member=principals, ) admin_conn.add_entry(entry) except errors.EmptyModlist: # If there are no changes just pass pass def case_insensitive_attr_has_value(attr, value): """ Helper function to find value in an attribute having case-insensitive matching rules :param attr: attribute values :param value: value to find :returns: True if the case-insensitive match succeeds, false otherwise """ if any(value.lower() == val.lower() for val in attr): return True return False def set_service_entry_config(name, fqdn, config_values, ldap_suffix='', post_add_config=()): """ Sets the 'ipaConfigString' values on the entry. If the entry is not present already, create a new one with desired 'ipaConfigString' :param name: service entry name :param config_values: configuration values to store :param fqdn: master fqdn :param ldap_suffix: LDAP backend suffix :param post_add_config: additional configuration to add when adding a non-existent entry """ assert isinstance(ldap_suffix, DN) entry_name = DN( ('cn', name), ('cn', fqdn), ('cn', 'masters'), ('cn', 'ipa'), ('cn', 'etc'), ldap_suffix) # enable disabled service try: entry = api.Backend.ldap2.get_entry( entry_name, ['ipaConfigString']) except errors.NotFound: pass else: existing_values = entry.get('ipaConfigString', []) for value in config_values: if case_insensitive_attr_has_value(existing_values, value): logger.debug( "service %s: config string %s already set", name, value) entry.setdefault('ipaConfigString', []).append(value) try: api.Backend.ldap2.update_entry(entry) except errors.EmptyModlist: logger.debug( "service %s has already enabled config values %s", name, config_values) return except: logger.debug("failed to set service %s config values", name) raise logger.debug("service %s has all config values set", name) return entry = api.Backend.ldap2.make_entry( entry_name, objectclass=["nsContainer", "ipaConfigObject"], cn=[name], ipaconfigstring=config_values + list(post_add_config), ) try: api.Backend.ldap2.add_entry(entry) except (errors.DuplicateEntry) as e: logger.debug("failed to add service entry %s", name) raise e def enable_services(fqdn): """Change all configured services to enabled Server.ldap_configure() only marks a service as configured. Services are enabled at the very end of installation. Note: DNS records must be updated with dns_update_system_records, too. :param fqdn: hostname of server """ ldap2 = api.Backend.ldap2 search_base = DN(('cn', fqdn), api.env.container_masters, api.env.basedn) search_filter = ldap2.make_filter( { 'objectClass': 'ipaConfigObject', 'ipaConfigString': CONFIGURED_SERVICE }, rules='&' ) entries = ldap2.get_entries( search_base, filter=search_filter, scope=api.Backend.ldap2.SCOPE_ONELEVEL, attrs_list=['cn', 'ipaConfigString'] ) for entry in entries: name = entry['cn'] cfgstrings = entry.setdefault('ipaConfigString', []) for value in list(cfgstrings): if value.lower() == CONFIGURED_SERVICE.lower(): cfgstrings.remove(value) if not case_insensitive_attr_has_value(cfgstrings, ENABLED_SERVICE): cfgstrings.append(ENABLED_SERVICE) try: ldap2.update_entry(entry) except errors.EmptyModlist: logger.debug("Nothing to do for service %s", name) except Exception: logger.exception("failed to set service %s config values", name) raise else: logger.debug("Enabled service %s for %s", name, fqdn) class Service: def __init__(self, service_name, service_desc=None, sstore=None, fstore=None, api=api, realm_name=None, service_user=None, service_prefix=None, keytab=None): self.service_name = service_name self.service_desc = service_desc self.service = services.service(service_name, api) self.steps = [] self.output_fd = sys.stdout self.fqdn = socket.gethostname() if sstore: self.sstore = sstore else: self.sstore = sysrestore.StateFile(paths.SYSRESTORE) if fstore: self.fstore = fstore else: self.fstore = sysrestore.FileStore(paths.SYSRESTORE) self.realm = realm_name self.suffix = DN() self.service_prefix = service_prefix self.keytab = keytab self.cert = None self.api = api self.service_user = service_user self.keytab_user = service_user self.dm_password = None # silence pylint self.promote = False @property def principal(self): if any(attr is None for attr in (self.realm, self.fqdn, self.service_prefix)): return None return unicode( kerberos.Principal( (self.service_prefix, self.fqdn), realm=self.realm)) def _ldap_mod(self, ldif, sub_dict=None, raise_on_err=True, ldap_uri=None, dm_password=None): pw_name = None fd = None path = os.path.join(paths.USR_SHARE_IPA_DIR, ldif) nologlist = [] if sub_dict is not None: txt = ipautil.template_file(path, sub_dict) fd = ipautil.write_tmp_file(txt) path = fd.name # do not log passwords if 'PASSWORD' in sub_dict: nologlist.append(sub_dict['PASSWORD']) if 'RANDOM_PASSWORD' in sub_dict: nologlist.append(sub_dict['RANDOM_PASSWORD']) args = [paths.LDAPMODIFY, "-v", "-f", path] # As we always connect to the local host, # use URI of admin connection if not ldap_uri: ldap_uri = api.Backend.ldap2.ldap_uri args += ["-H", ldap_uri] if dm_password: with tempfile.NamedTemporaryFile( mode='w', delete=False) as pw_file: pw_file.write(dm_password) pw_name = pw_file.name auth_parms = ["-x", "-D", "cn=Directory Manager", "-y", pw_name] # Use GSSAPI auth when not using DM password or not being root elif os.getegid() != 0: auth_parms = ["-Y", "GSSAPI"] # Default to EXTERNAL auth mechanism else: auth_parms = ["-Y", "EXTERNAL"] args += auth_parms try: try: ipautil.run(args, nolog=nologlist) except ipautil.CalledProcessError as e: logger.critical("Failed to load %s: %s", ldif, str(e)) if raise_on_err: raise finally: if pw_name: os.remove(pw_name) def move_service(self, principal): """ Used to move a principal entry created by kadmin.local from cn=kerberos to cn=services """ dn = DN(('krbprincipalname', principal), ('cn', self.realm), ('cn', 'kerberos'), self.suffix) try: entry = api.Backend.ldap2.get_entry(dn) except errors.NotFound: # There is no service in the wrong location, nothing to do. # This can happen when installing a replica return None entry.pop('krbpwdpolicyreference', None) # don't copy virtual attr newdn = DN(('krbprincipalname', principal), ('cn', 'services'), ('cn', 'accounts'), self.suffix) hostdn = DN(('fqdn', self.fqdn), ('cn', 'computers'), ('cn', 'accounts'), self.suffix) api.Backend.ldap2.delete_entry(entry) entry.dn = newdn classes = entry.get("objectclass") classes = classes + ["ipaobject", "ipaservice", "pkiuser"] entry["objectclass"] = list(set(classes)) entry["ipauniqueid"] = ['autogenerate'] entry["managedby"] = [hostdn] api.Backend.ldap2.add_entry(entry) return newdn def add_simple_service(self, principal): """ Add a very basic IPA service. The principal needs to be fully-formed: service/host@REALM """ dn = DN(('krbprincipalname', principal), ('cn', 'services'), ('cn', 'accounts'), self.suffix) hostdn = DN(('fqdn', self.fqdn), ('cn', 'computers'), ('cn', 'accounts'), self.suffix) entry = api.Backend.ldap2.make_entry( dn, objectclass=[ "krbprincipal", "krbprincipalaux", "krbticketpolicyaux", "ipaobject", "ipaservice", "pkiuser"], krbprincipalname=[principal], ipauniqueid=['autogenerate'], managedby=[hostdn], ) api.Backend.ldap2.add_entry(entry) return dn def add_cert_to_service(self): """ Add a certificate to a service This server cert should be in DER format. """ if self.cert is None: raise ValueError("{} has no cert".format(self.service_name)) dn = DN(('krbprincipalname', self.principal), ('cn', 'services'), ('cn', 'accounts'), self.suffix) entry = api.Backend.ldap2.get_entry(dn) entry.setdefault('userCertificate', []).append(self.cert) try: api.Backend.ldap2.update_entry(entry) except Exception as e: logger.critical("Could not add certificate to service %s entry: " "%s", self.principal, str(e)) def export_ca_certs_file(self, cafile, ca_is_configured, conn=None): """ Export the CA certificates stored in LDAP into a file :param cafile: the file to write the CA certificates to :param ca_is_configured: whether IPA is CA-less or not :param conn: an optional LDAP connection to use """ if conn is None: conn = api.Backend.ldap2 ca_certs = None try: ca_certs = certstore.get_ca_certs( conn, self.suffix, self.realm, ca_is_configured) except errors.NotFound: pass else: with open(cafile, 'wb') as fd: for cert, _unused, _unused, _unused in ca_certs: fd.write(cert.public_bytes(x509.Encoding.PEM)) def export_ca_certs_nssdb(self, db, ca_is_configured, conn=None): """ Export the CA certificates stored in LDAP into an NSS database :param db: the target NSS database :param ca_is_configured: whether IPA is CA-less or not :param conn: an optional LDAP connection to use """ if conn is None: conn = api.Backend.ldap2 try: ca_certs = certstore.get_ca_certs_nss( conn, self.suffix, self.realm, ca_is_configured) except errors.NotFound: pass else: for cert, nickname, trust_flags in ca_certs: db.add_cert(cert, nickname, trust_flags) def is_configured(self): return self.sstore.has_state(self.service_name) def set_output(self, fd): self.output_fd = fd def stop(self, instance_name="", capture_output=True): self.service.stop(instance_name, capture_output=capture_output) def start(self, instance_name="", capture_output=True, wait=True): self.service.start(instance_name, capture_output=capture_output, wait=wait) def restart(self, instance_name="", capture_output=True, wait=True): self.service.restart(instance_name, capture_output=capture_output, wait=wait) def is_running(self, instance_name="", wait=True): return self.service.is_running(instance_name, wait) def install(self): self.service.install() def remove(self): self.service.remove() def enable(self): self.service.enable() def disable(self): self.service.disable() def is_enabled(self): return self.service.is_enabled() def mask(self): return self.service.mask() def unmask(self): return self.service.unmask() def is_masked(self): return self.service.is_masked() def backup_state(self, key, value): self.sstore.backup_state(self.service_name, key, value) def restore_state(self, key): return self.sstore.restore_state(self.service_name, key) def get_state(self, key): return self.sstore.get_state(self.service_name, key) def print_msg(self, message): print_msg(message, self.output_fd) def step(self, message, method, run_after_failure=False): self.steps.append((message, method, run_after_failure)) def start_creation(self, start_message=None, end_message=None, show_service_name=True, runtime=None): """ Starts creation of the service. Use start_message and end_message for explicit messages at the beggining / end of the process. Otherwise they are generated using the service description (or service name, if the description has not been provided). Use show_service_name to include service name in generated descriptions. """ creation_start = time.time() if start_message is None: # no other info than mandatory service_name provided, use that if self.service_desc is None: start_message = "Configuring %s" % self.service_name # description should be more accurate than service name else: start_message = "Configuring %s" % self.service_desc if show_service_name: start_message = "%s (%s)" % (start_message, self.service_name) if end_message is None: if self.service_desc is None: if show_service_name: end_message = "Done configuring %s." % self.service_name else: end_message = "Done." else: if show_service_name: end_message = "Done configuring %s (%s)." % ( self.service_desc, self.service_name) else: end_message = "Done configuring %s." % self.service_desc if runtime is not None and runtime > 0: self.print_msg('%s. Estimated time: %s' % (start_message, format_seconds(runtime))) else: self.print_msg(start_message) def run_step(message, method): self.print_msg(message) start = time.time() method() dur = time.time() - start name = method.__name__ logger.debug( "step duration: %s %s %.02f sec", self.service_name, name, dur, extra={'timing': ('step', self.service_name, name, dur)}, ) step = 0 steps_iter = iter(self.steps) try: for message, method, run_after_failure in steps_iter: full_msg = " [%d/%d]: %s" % (step+1, len(self.steps), message) run_step(full_msg, method) step += 1 except BaseException as e: if not (isinstance(e, SystemExit) and e.code == 0): # pylint: disable=no-member # show the traceback, so it's not lost if cleanup method fails logger.debug("%s", traceback.format_exc()) self.print_msg(' [error] %s: %s' % (type(e).__name__, e)) # run through remaining methods marked run_after_failure for message, method, run_after_failure in steps_iter: if run_after_failure: run_step(" [cleanup]: %s" % message, method) raise self.print_msg(end_message) dur = time.time() - creation_start logger.debug( "service duration: %s %.02f sec", self.service_name, dur, extra={'timing': ('service', self.service_name, None, dur)}, ) self.steps = [] def ldap_enable(self, name, fqdn, dm_password=None, ldap_suffix='', config=()): """Legacy function, all services should use ldap_configure() """ warnings.warn( "ldap_enable is deprecated, use ldap_configure instead.", DeprecationWarning, stacklevel=2 ) self._ldap_enable(ENABLED_SERVICE, name, fqdn, ldap_suffix, config) def ldap_configure(self, name, fqdn, dm_password=None, ldap_suffix='', config=()): """Create or modify service entry in cn=masters,cn=ipa,cn=etc Contrary to ldap_enable(), the method only sets ipaConfigString=configuredService. ipaConfigString=enabledService is set at the very end of the installation process, to ensure that other machines see this master/replica after it is fully installed. To switch all configured services to enabled, use:: ipaserver.install.service.enable_services(api.env.host) api.Command.dns_update_system_records() """ self._ldap_enable( CONFIGURED_SERVICE, name, fqdn, ldap_suffix, config ) def _ldap_enable(self, value, name, fqdn, ldap_suffix, config): extra_config_opts = [ u'startOrder {}'.format(SERVICE_LIST[name].startorder), ] extra_config_opts.extend(config) self.disable() set_service_entry_config( name, fqdn, [value], ldap_suffix=ldap_suffix, post_add_config=extra_config_opts) def ldap_disable(self, name, fqdn, ldap_suffix): assert isinstance(ldap_suffix, DN) entry_dn = DN(('cn', name), ('cn', fqdn), ('cn', 'masters'), ('cn', 'ipa'), ('cn', 'etc'), ldap_suffix) search_kw = {'ipaConfigString': ENABLED_SERVICE} filter = api.Backend.ldap2.make_filter(search_kw) try: entries, _truncated = api.Backend.ldap2.find_entries( filter=filter, attrs_list=['ipaConfigString'], base_dn=entry_dn, scope=api.Backend.ldap2.SCOPE_BASE) except errors.NotFound: logger.debug("service %s startup entry already disabled", name) return assert len(entries) == 1 # only one entry is expected entry = entries[0] # case insensitive for value in entry.get('ipaConfigString', []): if value.lower() == ENABLED_SERVICE: entry['ipaConfigString'].remove(value) break try: api.Backend.ldap2.update_entry(entry) except errors.EmptyModlist: pass except: logger.debug("failed to disable service %s startup entry", name) raise logger.debug("service %s startup entry disabled", name) def ldap_remove_service_container(self, name, fqdn, ldap_suffix): entry_dn = DN(('cn', name), ('cn', fqdn), ('cn', 'masters'), ('cn', 'ipa'), ('cn', 'etc'), ldap_suffix) try: api.Backend.ldap2.delete_entry(entry_dn) except errors.NotFound: logger.debug("service %s container already removed", name) else: logger.debug("service %s container sucessfully removed", name) def _add_service_principal(self): try: self.api.Command.service_add(self.principal, force=True) except errors.DuplicateEntry: pass def clean_previous_keytab(self, keytab=None): if keytab is None: keytab = self.keytab self.fstore.backup_file(keytab) try: os.unlink(keytab) except OSError: pass def set_keytab_owner(self, keytab=None, owner=None): if keytab is None: keytab = self.keytab if owner is None: owner = self.service_user pent = pwd.getpwnam(owner) os.chown(keytab, pent.pw_uid, pent.pw_gid) def run_getkeytab(self, ldap_uri, keytab, principal, retrieve=False): """ retrieve service keytab using ipa-getkeytab. This assumes that the service principal is already created in LDAP. By default GSSAPI authentication is used unless: * LDAPI socket is used and effective process UID is 0, then autobind is used by EXTERNAL SASL mech * self.dm_password is not none, then DM credentials are used to fetch keytab """ args = [paths.IPA_GETKEYTAB, '-k', keytab, '-p', principal, '-H', ldap_uri] nolog = tuple() if ldap_uri.startswith("ldapi://") and os.geteuid() == 0: args.extend(["-Y", "EXTERNAL"]) elif self.dm_password is not None and not self.promote: args.extend( ['-D', 'cn=Directory Manager', '-w', self.dm_password]) nolog += (self.dm_password,) if retrieve: args.extend(['-r']) ipautil.run(args, nolog=nolog) def request_service_keytab(self): if any(attr is None for attr in (self.principal, self.keytab)): raise NotImplementedError( "service must have defined principal " "name and keytab") self._add_service_principal() self.clean_previous_keytab() self.run_getkeytab(self.api.env.ldap_uri, self.keytab, self.principal) self.set_keytab_owner() class SimpleServiceInstance(Service): def create_instance(self, gensvc_name=None, fqdn=None, ldap_suffix=None, realm=None): self.gensvc_name = gensvc_name self.fqdn = fqdn self.suffix = ldap_suffix self.realm = realm self.step("starting %s " % self.service_name, self.__start) self.step("configuring %s to start on boot" % self.service_name, self.__enable) self.start_creation("Configuring %s" % self.service_name) suffix = ipautil.dn_attribute_property('_ldap_suffix') def __start(self): self.backup_state("running", self.is_running()) self.restart() def __enable(self): self.backup_state("enabled", self.is_enabled()) if self.gensvc_name == None: self.enable() else: self.ldap_configure(self.gensvc_name, self.fqdn, None, self.suffix) def is_installed(self): return self.service.is_installed() def uninstall(self): if self.is_configured(): self.print_msg("Unconfiguring %s" % self.service_name) running = self.restore_state("running") enabled = self.restore_state("enabled") if self.is_installed(): self.stop() self.disable() if running: self.start() if enabled: self.enable()