????
Your IP : 3.17.78.47
#! /usr/bin/python -E
# Authors: Simo Sorce <ssorce@redhat.com>
# Karl MacMillan <kmacmillan@mentalrootkit.com>
#
# 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 <http://www.gnu.org/licenses/>.
#
try:
import sys
import os
import time
import socket
import ldap
import ldap.sasl
import urlparse
from ipapython.ipa_log_manager import *
import tempfile
import getpass
from ipaclient import ipadiscovery
from ipaclient.ipadiscovery import CACERT
import ipaclient.ipachangeconf
import ipaclient.ntpconf
from ipapython.ipautil import run, user_input, CalledProcessError,\
file_exists, realm_to_suffix,\
convert_ldap_error
import ipapython.services as ipaservices
from ipapython import ipautil
from ipapython import sysrestore
from ipapython import version
from ipapython import certmonger
from ipapython.config import IPAOptionParser
from ipalib import api, errors
from ipalib import x509
from ipapython.dn import DN
from ipapython.ssh import SSHPublicKey
from ipalib.rpc import delete_persistent_client_session_data
import nss.nss as nss
import SSSDConfig
from ConfigParser import RawConfigParser
from optparse import SUPPRESS_HELP, OptionGroup, OptionValueError
except ImportError:
print >> sys.stderr, """\
There was a problem importing one of the required Python modules. The
error was:
%s
""" % sys.exc_value
sys.exit(1)
SUCCESS = 0
CLIENT_INSTALL_ERROR = 1
CLIENT_NOT_CONFIGURED = 2
CLIENT_ALREADY_CONFIGURED = 3
CLIENT_UNINSTALL_ERROR = 4 # error after restoring files/state
client_nss_nickname_format = 'IPA Machine Certificate - %s'
NSSWITCH_CONF = '/etc/nsswitch.conf'
def parse_options():
def validate_ca_cert_file_option(option, opt, value, parser):
if not os.path.exists(value):
raise OptionValueError("%s option '%s' does not exist" % (opt, value))
if not os.path.isfile(value):
raise OptionValueError("%s option '%s' is not a file" % (opt, value))
if not os.path.isabs(value):
raise OptionValueError("%s option '%s' is not an absolute file path" % (opt, value))
initialized = nss.nss_is_initialized()
try:
cert = x509.load_certificate_from_file(value)
except Exception, e:
raise OptionValueError("%s option '%s' is not a valid certificate file" % (opt, value))
else:
del(cert)
if not initialized:
nss.nss_shutdown()
parser.values.ca_cert_file = value
def validate_kinit_attempts_option(option, opt, value, parser):
if value < 1 or value > sys.maxint:
raise OptionValueError(
"%s option has invalid value %d" % (opt, value))
parser.values.kinit_attempts = value
parser = IPAOptionParser(version=version.VERSION)
basic_group = OptionGroup(parser, "basic options")
basic_group.add_option("--domain", dest="domain", help="domain name")
basic_group.add_option("--server", dest="server", help="IPA server", action="append")
basic_group.add_option("--realm", dest="realm_name", help="realm name")
basic_group.add_option("--fixed-primary", dest="primary", action="store_true",
default=False, help="Configure sssd to use fixed server as primary IPA server")
basic_group.add_option("-p", "--principal", dest="principal",
help="principal to use to join the IPA realm"),
basic_group.add_option("-w", "--password", dest="password", sensitive=True,
help="password to join the IPA realm (assumes bulk password unless principal is also set)"),
basic_group.add_option("-W", dest="prompt_password", action="store_true",
default=False,
help="Prompt for a password to join the IPA realm"),
basic_group.add_option("--mkhomedir", dest="mkhomedir",
action="store_true", default=False,
help="create home directories for users on their first login")
basic_group.add_option("", "--hostname", dest="hostname",
help="The hostname of this machine (FQDN). If specified, the hostname will be set and "
"the system configuration will be updated to persist over reboot. "
"By default a nodename result from uname(2) is used.")
basic_group.add_option("", "--force-join", dest="force_join",
action="store_true", default=False,
help="Force client enrollment even if already enrolled")
basic_group.add_option("--ntp-server", dest="ntp_server", help="ntp server to use")
basic_group.add_option("-N", "--no-ntp", action="store_false",
help="do not configure ntp", default=True, dest="conf_ntp")
basic_group.add_option("--nisdomain", dest="nisdomain",
help="NIS domain name")
basic_group.add_option("--no-nisdomain", action="store_true", default=False,
help="do not configure NIS domain name",
dest="no_nisdomain")
basic_group.add_option("--ssh-trust-dns", dest="trust_sshfp", default=False, action="store_true",
help="configure OpenSSH client to trust DNS SSHFP records")
basic_group.add_option("--no-ssh", dest="conf_ssh", default=True, action="store_false",
help="do not configure OpenSSH client")
basic_group.add_option("--no-sshd", dest="conf_sshd", default=True, action="store_false",
help="do not configure OpenSSH server")
basic_group.add_option("--no-sudo", dest="conf_sudo", default=True,
action="store_false",
help="do not configure SSSD as data source for sudo")
basic_group.add_option("--no-dns-sshfp", dest="create_sshfp", default=True, action="store_false",
help="do not automatically create DNS SSHFP records")
basic_group.add_option("--noac", dest="no_ac", default=False, action="store_true",
help="do not use Authconfig to modify the nsswitch.conf and PAM configuration")
basic_group.add_option("-f", "--force", dest="force", action="store_true",
default=False, help="force setting of LDAP/Kerberos conf")
basic_group.add_option('--kinit-attempts', dest='kinit_attempts',
action='callback', type='int', default=5,
callback=validate_kinit_attempts_option,
help=("number of attempts to obtain host TGT"
" (defaults to %default)."))
basic_group.add_option("-d", "--debug", dest="debug", action="store_true",
default=False, help="print debugging information")
basic_group.add_option("-U", "--unattended", dest="unattended",
action="store_true",
help="unattended (un)installation never prompts the user")
basic_group.add_option("--ca-cert-file", dest="ca_cert_file",
type="string", action="callback", callback=validate_ca_cert_file_option,
help="load the CA certificate from this file")
# --on-master is used in ipa-server-install and ipa-replica-install
# only, it isn't meant to be used on clients.
basic_group.add_option("--on-master", dest="on_master", action="store_true",
help=SUPPRESS_HELP, default=False)
parser.add_option_group(basic_group)
sssd_group = OptionGroup(parser, "SSSD options")
sssd_group.add_option("--permit", dest="permit",
action="store_true", default=False,
help="disable access rules by default, permit all access.")
sssd_group.add_option("", "--enable-dns-updates", dest="dns_updates",
action="store_true", default=False,
help="Configures the machine to attempt dns updates when the ip address changes.")
sssd_group.add_option("--no-krb5-offline-passwords", dest="krb5_offline_passwords",
action="store_false", default=True,
help="Configure SSSD not to store user password when the server is offline")
sssd_group.add_option("-S", "--no-sssd", dest="sssd",
action="store_false", default=True,
help="Do not configure the client to use SSSD for authentication")
sssd_group.add_option("--preserve-sssd", dest="preserve_sssd",
action="store_true", default=False,
help="Preserve old SSSD configuration if possible")
parser.add_option_group(sssd_group)
uninstall_group = OptionGroup(parser, "uninstall options")
uninstall_group.add_option("", "--uninstall", dest="uninstall", action="store_true",
default=False, help="uninstall an existing installation. The uninstall can " \
"be run with --unattended option")
parser.add_option_group(uninstall_group)
options, args = parser.parse_args()
safe_opts = parser.get_safe_opts(options)
if (options.server and not options.domain):
parser.error("--server cannot be used without providing --domain")
if options.no_nisdomain and options.nisdomain:
parser.error("--no-nisdomain cannot be used together with --nisdomain")
return safe_opts, options
def logging_setup(options):
log_file = "/var/log/ipaclient-install.log"
if options.uninstall:
log_file = "/var/log/ipaclient-uninstall.log"
standard_logging_setup(
filename=log_file, verbose=True, debug=options.debug,
console_format='%(message)s')
def log_service_error(name, action, error):
root_logger.error("%s failed to %s: %s", name, action, str(error))
def nickname_exists(nickname):
(sout, serr, returncode) = run(["/usr/bin/certutil", "-L", "-d", "/etc/pki/nssdb", "-n", nickname], raiseonerr=False)
if returncode == 0:
return True
else:
return False
def cert_summary(msg, cert, indent=' '):
if msg:
s = '%s\n' % msg
else:
s = ''
s += '%sSubject: %s\n' % (indent, cert.subject)
s += '%sIssuer: %s\n' % (indent, cert.issuer)
s += '%sValid From: %s\n' % (indent, cert.valid_not_before_str)
s += '%sValid Until: %s\n' % (indent, cert.valid_not_after_str)
return s
def get_cert_path(cert_path):
"""
If a CA certificate is passed in on the command line, use that.
Else if a CA file exists in CACERT then use that.
Otherwise return None.
"""
if cert_path is not None:
return cert_path
if os.path.exists(CACERT):
return CACERT
return None
# Checks whether nss_ldap or nss-pam-ldapd is installed. If anyone of mandatory files was found returns True and list of all files found.
def nssldap_exists():
files_to_check = [{'function':'configure_ldap_conf', 'mandatory':['/etc/ldap.conf','/etc/nss_ldap.conf','/etc/libnss-ldap.conf'], 'optional':['/etc/pam_ldap.conf']},
{'function':'configure_nslcd_conf', 'mandatory':['/etc/nslcd.conf']}]
files_found = {}
retval = False
for function in files_to_check:
files_found[function['function']]=[]
for file_type in ['mandatory','optional']:
try:
for filename in function[file_type]:
if file_exists(filename):
files_found[function['function']].append(filename)
if file_type == 'mandatory':
retval = True
except KeyError:
pass
return (retval, files_found)
# helper function for uninstall
# deletes IPA domain from sssd.conf
def delete_ipa_domain():
sssd = ipaservices.service('sssd')
try:
sssdconfig = SSSDConfig.SSSDConfig()
sssdconfig.import_config()
domains = sssdconfig.list_active_domains()
ipa_domain_name = None
for name in domains:
domain = sssdconfig.get_domain(name)
try:
provider = domain.get_option('id_provider')
if provider == "ipa":
ipa_domain_name = name
break
except SSSDConfig.NoOptionError:
continue
if ipa_domain_name is not None:
sssdconfig.delete_domain(ipa_domain_name)
sssdconfig.write()
else:
root_logger.warning("IPA domain could not be found in "
"/etc/sssd/sssd.conf and therefore not deleted")
except IOError:
root_logger.warning("IPA domain could not be deleted. "
"No access to the /etc/sssd/sssd.conf file.")
def is_ipa_client_installed(on_master=False):
"""
Consider IPA client not installed if nothing is backed up
and default.conf file does not exist. If on_master is set to True,
the existence of default.conf file is not taken into consideration,
since it has been already created by ipa-server-install.
"""
installed = fstore.has_files() or \
(not on_master and os.path.exists('/etc/ipa/default.conf'))
return installed
def configure_nsswitch_database(fstore, database, services, preserve=True,
append=True, default_value=None):
"""
Edits the specified nsswitch.conf database (e.g. passwd, group, sudoers)
to use the specified service(s).
Arguments:
fstore - FileStore to backup the nsswitch.conf
database - database configuration that should be ammended, e.g 'sudoers'
service - list of services that should be added, e.g. ['sss']
preserve - if True, the already configured services will be preserved
The next arguments modify the behaviour if preserve=True:
append - if True, the services will be appended, if False, prepended
default_value - list of services that are considered as default (if
the database is not mentioned in nsswitch.conf), e.g.
['files']
"""
# Backup the original version of nsswitch.conf, we're going to edit it now
if not fstore.has_file(NSSWITCH_CONF):
fstore.backup_file(NSSWITCH_CONF)
conf = ipaclient.ipachangeconf.IPAChangeConf("IPA Installer")
conf.setOptionAssignment(':')
if preserve:
# Read the existing configuration
with open('/etc/nsswitch.conf', 'r') as f:
opts = conf.parse(f)
raw_database_entry = conf.findOpts(opts, 'option', database)[1]
if not raw_database_entry:
# If there is no database entry, database is not present in
# the nsswitch.conf. Set the list of services to the
# default list, if passed.
configured_services = ' '.join(default_value or [])
else:
configured_services = raw_database_entry['value'].strip()
# Make sure no service is added if already mentioned in the list
added_services = [s for s in services
if s not in configured_services]
if append:
new_services = (' ' + configured_services + ' ' +
' '.join(added_services))
else:
new_services = (' ' + ' '.join(added_services) +
' ' + configured_services)
else:
# Preserve not set, let's rewrite existing configuration
new_services = ' ' + ' '.join(services)
# Set new services as sources for database
opts = [{'name': database,
'type':'option',
'action':'set',
'value': new_services
},
{'name':'empty',
'type':'empty'
}]
conf.changeConf(NSSWITCH_CONF, opts)
root_logger.info("Configured %s in %s" % (database, NSSWITCH_CONF))
def uninstall(options, env):
if not is_ipa_client_installed():
root_logger.error("IPA client is not configured on this system.")
return CLIENT_NOT_CONFIGURED
server_fstore = sysrestore.FileStore('/var/lib/ipa/sysrestore')
if server_fstore.has_files() and not options.on_master:
root_logger.error(
"IPA client is configured as a part of IPA server on this system.")
root_logger.info("Refer to ipa-server-install for uninstallation.")
return CLIENT_NOT_CONFIGURED
try:
run(["ipa-client-automount", "--uninstall", "--debug"])
except Exception, e:
root_logger.error(
"Unconfigured automount client failed: %s", str(e))
# Reload the state as automount unconfigure may have modified it
fstore._load()
statestore._load()
hostname = None
was_sssd_configured = False
try:
sssdconfig = SSSDConfig.SSSDConfig()
sssdconfig.import_config()
domains = sssdconfig.list_active_domains()
all_domains = sssdconfig.list_domains()
# we consider all the domains, because handling sssd.conf
# during uninstall is dependant on was_sssd_configured flag
# so the user does not lose info about inactive domains
if len(all_domains) > 1:
# There was more than IPA domain configured
was_sssd_configured = True
for name in domains:
domain = sssdconfig.get_domain(name)
try:
provider = domain.get_option('id_provider')
except SSSDConfig.NoOptionError:
continue
if provider == "ipa":
try:
hostname = domain.get_option('ipa_hostname')
except SSSDConfig.NoOptionError:
continue
except Exception, e:
# We were unable to read existing SSSD config. This might mean few things:
# - sssd wasn't installed
# - sssd was removed after install and before uninstall
# - there are no active domains
# in both cases we cannot continue with SSSD
pass
if hostname is None:
hostname = socket.getfqdn()
client_nss_nickname = client_nss_nickname_format % hostname
# Remove our host cert and CA cert
if nickname_exists("IPA CA"):
try:
run(["/usr/bin/certutil", "-D", "-d", "/etc/pki/nssdb", "-n", "IPA CA"])
except Exception, e:
root_logger.error(
"Failed to remove IPA CA from /etc/pki/nssdb: %s", str(e))
# Always start certmonger. We can't untrack something if it isn't
# running
messagebus = ipaservices.knownservices.messagebus
try:
messagebus.start()
except Exception, e:
log_service_error(messagebus.service_name, 'start', e)
cmonger = ipaservices.knownservices.certmonger
try:
cmonger.start()
except Exception, e:
log_service_error(cmonger.service_name, 'start', e)
try:
certmonger.stop_tracking('/etc/pki/nssdb', nickname=client_nss_nickname)
except (CalledProcessError, RuntimeError), e:
root_logger.error("%s failed to stop tracking certificate: %s",
cmonger.service_name, str(e))
if nickname_exists(client_nss_nickname):
try:
run(["/usr/bin/certutil", "-D", "-d", "/etc/pki/nssdb", "-n", client_nss_nickname])
except Exception, e:
root_logger.error("Failed to remove %s from /etc/pki/nssdb: %s",
client_nss_nickname, str(e))
try:
cmonger.stop()
except Exception, e:
log_service_error(cmonger.service_name, 'stop', e)
# Remove any special principal names we added to the IPA CA helper
certmonger.remove_principal_from_cas()
try:
cmonger.disable()
except Exception, e:
root_logger.error(
"Failed to disable automatic startup of the %s service: %s",
cmonger.service_name, str(e))
if not options.on_master and os.path.exists('/etc/ipa/default.conf'):
root_logger.info("Unenrolling client from IPA server")
join_args = ["/usr/sbin/ipa-join", "--unenroll", "-h", hostname]
if options.debug:
join_args.append("-d")
env['XMLRPC_TRACE_CURL'] = 'yes'
(stdout, stderr, returncode) = run(join_args, raiseonerr=False, env=env)
if returncode != 0:
root_logger.error("Unenrolling host failed: %s", stderr)
if os.path.exists('/etc/ipa/default.conf'):
root_logger.info(
"Removing Kerberos service principals from /etc/krb5.keytab")
try:
parser = RawConfigParser()
fp = open('/etc/ipa/default.conf', 'r')
parser.readfp(fp)
fp.close()
realm = parser.get('global', 'realm')
run(["/usr/sbin/ipa-rmkeytab", "-k", "/etc/krb5.keytab", "-r", realm])
except Exception, e:
root_logger.error(
"Failed to remove Kerberos service principals: %s", str(e))
root_logger.info("Disabling client Kerberos and LDAP configurations")
was_sssd_installed = False
was_sshd_configured = False
if fstore.has_files():
was_sssd_installed = fstore.has_file("/etc/sssd/sssd.conf")
sshd_config = os.path.join(ipaservices.knownservices.sshd.get_config_dir(), "sshd_config")
was_sshd_configured = fstore.has_file(sshd_config)
try:
auth_config = ipaservices.authconfig()
if statestore.has_state('authconfig'):
# disable only those configurations that we enabled during install
for conf in ('ldap', 'krb5', 'sssd', 'sssdauth', 'mkhomedir'):
cnf = statestore.restore_state('authconfig', conf)
if cnf:
auth_config.disable(conf)
else:
# There was no authconfig status store
# It means the code was upgraded after original install
# Fall back to old logic
auth_config.disable("ldap").\
disable("krb5")
if not(was_sssd_installed and was_sssd_configured):
# assume there was sssd.conf before install and there were more than one domain in it
# In such case restoring sssd.conf will require us to keep SSSD running
auth_config.disable("sssd").\
disable("sssdauth")
auth_config.disable("mkhomedir")
auth_config.add_option("update")
auth_config.execute()
except Exception, e:
root_logger.error(
"Failed to remove krb5/LDAP configuration: %s", str(e))
return CLIENT_INSTALL_ERROR
unconfigure_nisdomain()
# Next if-elif-elif construction deals with sssd.conf file.
# Old pre-IPA domains are preserved due merging the old sssd.conf
# during the installation of ipa-client but any new domains are
# only present in sssd.conf now, so we don't want to delete them
# by rewriting sssd.conf file. IPA domain is removed gracefully.
# SSSD was installed before our installation and other non-IPA domains
# found, restore backed up sssd.conf to sssd.conf.bkp and remove IPA
# domain from the current sssd.conf
if was_sssd_installed and was_sssd_configured:
root_logger.info(
"The original configuration of SSSD included other domains than " +
"the IPA-based one.")
delete_ipa_domain()
restored = False
try:
restored = fstore.restore_file("/etc/sssd/sssd.conf","/etc/sssd/sssd.conf.bkp")
except OSError:
root_logger.debug("Error while restoring pre-IPA /etc/sssd/sssd.conf.")
if restored:
root_logger.info("Original pre-IPA SSSD configuration file was "
"restored to /etc/sssd/sssd.conf.bkp.")
root_logger.info("IPA domain removed from current one, " +
"restarting SSSD service")
sssd = ipaservices.service('sssd')
try:
sssd.restart()
except CalledProcessError:
root_logger.warning("SSSD service restart was unsuccessful.")
# SSSD was not installed before our installation, but other domains found,
# delete IPA domain, but leave other domains intact
elif not was_sssd_installed and was_sssd_configured:
delete_ipa_domain()
root_logger.info("Other domains than IPA domain found, " +
"IPA domain was removed from /etc/sssd/sssd.conf.")
sssd = ipaservices.service('sssd')
try:
sssd.restart()
except CalledProcessError:
root_logger.warning("SSSD service restart was unsuccessful.")
# SSSD was not installed before our installation, and no other domains
# than IPA are configured in sssd.conf - make sure config file is removed
elif not was_sssd_installed and not was_sssd_configured:
try:
os.rename("/etc/sssd/sssd.conf","/etc/sssd/sssd.conf.deleted")
except OSError:
root_logger.debug("Error while moving /etc/sssd/sssd.conf to "
"/etc/sssd/sssd.conf.deleted")
root_logger.info("Redundant SSSD configuration file " +
"/etc/sssd/sssd.conf was moved to /etc/sssd/sssd.conf.deleted")
sssd = ipaservices.service('sssd')
try:
sssd.stop()
except CalledProcessError:
root_logger.warning("SSSD service could not be stopped")
try:
sssd.disable()
except CalledProcessError, e:
root_logger.warning(
"Failed to disable automatic startup of the SSSD daemon: %s", e)
if fstore.has_files():
root_logger.info("Restoring client configuration files")
fstore.restore_all_files()
old_hostname = statestore.restore_state('network', 'hostname')
if old_hostname is not None and old_hostname != hostname:
try:
ipautil.run(['/bin/hostname', old_hostname])
except CalledProcessError, e:
root_logger.error(
"Failed to set this machine's hostname to %s (%s).",
old_hostname, str(e))
nscd = ipaservices.knownservices.nscd
if nscd.is_installed():
try:
nscd.restart()
except Exception:
root_logger.warning(
"Failed to restart the %s daemon", nscd.service_name)
try:
nscd.enable()
except Exception:
root_logger.warning(
"Failed to configure automatic startup of the %s daemon",
nscd.service_name)
else:
# this is optional service, just log
root_logger.info("%s daemon is not installed, skip configuration",
nscd.service_name)
nslcd = ipaservices.knownservices.nslcd
if nslcd.is_installed():
try:
nslcd.stop()
except Exception:
root_logger.warning(
"Failed to stop the %s daemon", nslcd.service_name)
try:
nslcd.disable()
except Exception:
root_logger.warning(
"Failed to disable automatic startup of the %s daemon",
nslcd.service_name)
else:
# this is optional service, just log
root_logger.info("%s daemon is not installed, skip configuration",
nslcd.service_name)
ntp_configured = statestore.has_state('ntp')
if ntp_configured:
ntp_enabled = statestore.restore_state('ntp', 'enabled')
ntp_step_tickers = statestore.restore_state('ntp', 'step-tickers')
restored = False
try:
# Restore might fail due to file missing in backup
# the reason for it might be that freeipa-client was updated
# to this version but not unenrolled/enrolled again
# In such case it is OK to fail
restored = fstore.restore_file("/etc/ntp.conf")
restored |= fstore.restore_file("/etc/sysconfig/ntpd")
if ntp_step_tickers:
restored |= fstore.restore_file("/etc/ntp/step-tickers")
except Exception:
pass
if not ntp_enabled:
ipaservices.knownservices.ntpd.stop()
ipaservices.knownservices.ntpd.disable()
else:
if restored:
ipaservices.knownservices.ntpd.restart()
if was_sshd_configured and ipaservices.knownservices.sshd.is_running():
ipaservices.knownservices.sshd.restart()
if not options.unattended:
root_logger.info(
"The original nsswitch.conf configuration has been restored.")
root_logger.info(
"You may need to restart services or reboot the machine.")
if not options.on_master:
if user_input("Do you want to reboot the machine?", False):
try:
run(["/sbin/reboot"])
except Exception, e:
root_logger.error(
"Reboot command failed to exceute: %s", str(e))
return CLIENT_UNINSTALL_ERROR
rv = 0
if fstore.has_files():
root_logger.error('Some files have not been restored, see /var/lib/ipa-client/sysrestore/sysrestore.index')
has_state = False
for module in statestore.modules.keys():
root_logger.error('Some installation state for %s has not been restored, see /var/lib/ipa/sysrestore/sysrestore.state' % module)
has_state = True
rv = 1
if has_state:
root_logger.warning('Some installation state has not been restored.\nThis may cause re-installation to fail.\nIt should be safe to remove /var/lib/ipa-client/sysrestore.state but it may\nmean your system hasn\'t be restored to its pre-installation state.')
# Remove the IPA configuration file
try:
os.remove("/etc/ipa/default.conf")
except Exception:
pass
root_logger.info("Client uninstall complete.")
return rv
def configure_ipa_conf(fstore, cli_basedn, cli_realm, cli_domain, cli_server):
ipaconf = ipaclient.ipachangeconf.IPAChangeConf("IPA Installer")
ipaconf.setOptionAssignment(" = ")
ipaconf.setSectionNameDelimiters(("[","]"))
opts = [{'name':'comment', 'type':'comment', 'value':'File modified by ipa-client-install'},
{'name':'empty', 'type':'empty'}]
#[global]
defopts = [{'name':'basedn', 'type':'option', 'value':cli_basedn},
{'name':'realm', 'type':'option', 'value':cli_realm},
{'name':'domain', 'type':'option', 'value':cli_domain},
{'name':'server', 'type':'option', 'value':cli_server[0]},
{'name':'xmlrpc_uri', 'type':'option', 'value':'https://%s/ipa/xml' % ipautil.format_netloc(cli_server[0])},
{'name':'enable_ra', 'type':'option', 'value':'True'}]
opts.append({'name':'global', 'type':'section', 'value':defopts})
opts.append({'name':'empty', 'type':'empty'})
target_fname = '/etc/ipa/default.conf'
fstore.backup_file(target_fname)
ipaconf.newConf(target_fname, opts)
os.chmod(target_fname, 0644)
return 0
def disable_ra():
"""Set the enable_ra option in /etc/ipa/default.conf to False
Note that api.env will retain the old value (it is readonly).
"""
parser = RawConfigParser()
parser.read('/etc/ipa/default.conf')
parser.set('global', 'enable_ra', 'False')
fp = open('/etc/ipa/default.conf', 'w')
parser.write(fp)
fp.close()
def configure_ldap_conf(fstore, cli_basedn, cli_realm, cli_domain, cli_server, dnsok, options, files):
ldapconf = ipaclient.ipachangeconf.IPAChangeConf("IPA Installer")
ldapconf.setOptionAssignment(" ")
opts = [{'name':'comment', 'type':'comment', 'value':'File modified by ipa-client-install'},
{'name':'empty', 'type':'empty'},
{'name':'ldap_version', 'type':'option', 'value':'3'},
{'name':'base', 'type':'option', 'value':cli_basedn},
{'name':'empty', 'type':'empty'},
{'name':'nss_base_passwd', 'type':'option', 'value':str(DN(('cn', 'users'), ('cn', 'accounts'), cli_basedn))+'?sub'},
{'name':'nss_base_group', 'type':'option', 'value':str(DN(('cn', 'groups'), ('cn', 'accounts'), cli_basedn))+'?sub'},
{'name':'nss_schema', 'type':'option', 'value':'rfc2307bis'},
{'name':'nss_map_attribute', 'type':'option', 'value':'uniqueMember member'},
{'name':'nss_initgroups_ignoreusers', 'type':'option', 'value':'root,dirsrv'},
{'name':'empty', 'type':'empty'},
{'name':'nss_reconnect_maxsleeptime', 'type':'option', 'value':'8'},
{'name':'nss_reconnect_sleeptime', 'type':'option', 'value':'1'},
{'name':'bind_timelimit', 'type':'option', 'value':'5'},
{'name':'timelimit', 'type':'option', 'value':'15'},
{'name':'empty', 'type':'empty'}]
if not dnsok or options.force or options.on_master:
if options.on_master:
opts.append({'name':'uri', 'type':'option', 'value':'ldap://localhost'})
else:
opts.append({'name':'uri', 'type':'option', 'value':'ldap://'+ipautil.format_netloc(cli_server[0])})
else:
opts.append({'name':'nss_srv_domain', 'type':'option', 'value':cli_domain})
opts.append({'name':'empty', 'type':'empty'})
# Depending on the release and distribution this may exist in any
# number of different file names, update what we find
for filename in files:
try:
fstore.backup_file(filename)
ldapconf.newConf(filename, opts)
except Exception, e:
root_logger.error("Creation of %s failed: %s", filename, str(e))
return (1, 'LDAP', filename)
if files:
return (0, 'LDAP', ', '.join(files))
return 0, None, None
def configure_nslcd_conf(fstore, cli_basedn, cli_realm, cli_domain, cli_server, dnsok, options, files):
nslcdconf = ipaclient.ipachangeconf.IPAChangeConf("IPA Installer")
nslcdconf.setOptionAssignment(" ")
opts = [{'name':'comment', 'type':'comment', 'value':'File modified by ipa-client-install'},
{'name':'empty', 'type':'empty'},
{'name':'ldap_version', 'type':'option', 'value':'3'},
{'name':'base', 'type':'option', 'value':cli_basedn},
{'name':'empty', 'type':'empty'},
{'name':'base passwd', 'type':'option', 'value':str(DN(('cn', 'users'), ('cn', 'accounts'), cli_basedn))},
{'name':'base group', 'type':'option', 'value':str(DN(('cn', 'groups'), ('cn', 'accounts'), cli_basedn))},
{'name':'map group', 'type':'option', 'value':'uniqueMember member'},
{'name':'timelimit', 'type':'option', 'value':'15'},
{'name':'empty', 'type':'empty'}]
if not dnsok or options.force or options.on_master:
if options.on_master:
opts.append({'name':'uri', 'type':'option', 'value':'ldap://localhost'})
else:
opts.append({'name':'uri', 'type':'option', 'value':'ldap://'+ipautil.format_netloc(cli_server[0])})
else:
opts.append({'name':'uri', 'type':'option', 'value':'DNS'})
opts.append({'name':'empty', 'type':'empty'})
for filename in files:
try:
fstore.backup_file(filename)
nslcdconf.newConf(filename, opts)
except Exception, e:
root_logger.error("Creation of %s failed: %s", filename, str(e))
return (1, None, None)
nslcd = ipaservices.knownservices.nslcd
if nslcd.is_installed():
try:
nslcd.restart()
except Exception, e:
log_service_error(nslcd.service_name, 'restart', e)
try:
nslcd.enable()
except Exception, e:
root_logger.error(
"Failed to enable automatic startup of the %s daemon: %s",
nslcd.service_name, str(e))
else:
root_logger.debug("%s daemon is not installed, skip configuration",
nslcd.service_name)
return (0, None, None)
return (0, 'NSLCD', ', '.join(files))
def configure_openldap_conf(fstore, cli_basedn, cli_server):
ldapconf = ipaclient.ipachangeconf.IPAChangeConf("IPA Installer")
ldapconf.setOptionAssignment(" ")
opts = [{'name':'comment', 'type':'comment', 'value':'File modified by ipa-client-install'},
{'name':'empty', 'type':'empty'},
{'name':'URI', 'type':'option', 'value':'ldaps://'+ cli_server[0]},
{'name':'BASE', 'type':'option', 'value':cli_basedn},
{'name':'TLS_CACERT', 'type':'option', 'value':CACERT},
{'name':'empty', 'type':'empty'}]
target_fname = '/etc/openldap/ldap.conf'
fstore.backup_file(target_fname)
ldapconf.newConf(target_fname, opts)
os.chmod(target_fname, 0644)
def hardcode_ldap_server(cli_server):
"""
DNS Discovery didn't return a valid IPA server, hardcode a value into
the file instead.
"""
if not file_exists('/etc/ldap.conf'):
return
ldapconf = ipaclient.ipachangeconf.IPAChangeConf("IPA Installer")
ldapconf.setOptionAssignment(" ")
opts = [{'name':'uri', 'type':'option', 'action':'set', 'value':'ldap://'+ipautil.format_netloc(cli_server[0])},
{'name':'empty', 'type':'empty'}]
# Errors raised by this should be caught by the caller
ldapconf.changeConf("/etc/ldap.conf", opts)
root_logger.info("Changed configuration of /etc/ldap.conf to use " +
"hardcoded server name: %s", cli_server[0])
return
def configure_krb5_conf(cli_realm, cli_domain, cli_server, cli_kdc, dnsok,
options, filename, client_domain):
krbconf = ipaclient.ipachangeconf.IPAChangeConf("IPA Installer")
krbconf.setOptionAssignment((" = ", " "))
krbconf.setSectionNameDelimiters(("[","]"))
krbconf.setSubSectionDelimiters(("{","}"))
krbconf.setIndent((""," "," "))
opts = [{'name':'comment', 'type':'comment', 'value':'File modified by ipa-client-install'},
{'name':'empty', 'type':'empty'}]
# SSSD include dir
if options.sssd:
opts.append({'name':'includedir', 'type':'option', 'value':'/var/lib/sss/pubconf/krb5.include.d/', 'delim':' '})
opts.append({'name':'empty', 'type':'empty'})
#[libdefaults]
libopts = [{'name':'default_realm', 'type':'option', 'value':cli_realm}]
if not dnsok or not cli_kdc or options.force:
libopts.append({'name':'dns_lookup_realm', 'type':'option', 'value':'false'})
libopts.append({'name':'dns_lookup_kdc', 'type':'option', 'value':'false'})
else:
libopts.append({'name':'dns_lookup_realm', 'type':'option', 'value':'true'})
libopts.append({'name':'dns_lookup_kdc', 'type':'option', 'value':'true'})
libopts.append({'name':'rdns', 'type':'option', 'value':'false'})
libopts.append({'name':'ticket_lifetime', 'type':'option', 'value':'24h'})
libopts.append({'name':'forwardable', 'type':'option', 'value':'yes'})
libopts.append({'name':'udp_preference_limit', 'type':'option', 'value':'0'})
opts.append({'name':'libdefaults', 'type':'section', 'value':libopts})
opts.append({'name':'empty', 'type':'empty'})
#the following are necessary only if DNS discovery does not work
kropts = []
if not dnsok or not cli_kdc or options.force:
#[realms]
for server in cli_server:
kropts.append({'name':'kdc', 'type':'option', 'value':ipautil.format_netloc(server, 88)})
kropts.append({'name':'master_kdc', 'type':'option', 'value':ipautil.format_netloc(server, 88)})
kropts.append({'name':'admin_server', 'type':'option', 'value':ipautil.format_netloc(server, 749)})
kropts.append({'name':'default_domain', 'type':'option', 'value':cli_domain})
kropts.append({'name':'pkinit_anchors', 'type':'option', 'value':'FILE:%s' % CACERT})
ropts = [{'name':cli_realm, 'type':'subsection', 'value':kropts}]
opts.append({'name':'realms', 'type':'section', 'value':ropts})
opts.append({'name':'empty', 'type':'empty'})
#[domain_realm]
dropts = [{'name':'.'+cli_domain, 'type':'option', 'value':cli_realm},
{'name':cli_domain, 'type':'option', 'value':cli_realm}]
#add client domain mapping if different from server domain
if cli_domain != client_domain:
dropts.append({'name':'.'+client_domain, 'type':'option', 'value':cli_realm})
dropts.append({'name':client_domain, 'type':'option', 'value':cli_realm})
opts.append({'name':'domain_realm', 'type':'section', 'value':dropts})
opts.append({'name':'empty', 'type':'empty'})
root_logger.debug("Writing Kerberos configuration to %s:", filename)
root_logger.debug("%s", krbconf.dump(opts))
krbconf.newConf(filename, opts)
os.chmod(filename, 0644)
return 0
def get_host_tgt(host, realm, keytab, kinit_attempts, env):
n_attempts = 0
max_attempts = kinit_attempts
root_logger.info("Attempting to get host TGT...")
while True:
n_attempts += 1
try:
run([
'/usr/bin/kinit', '-k', '-t', keytab,
'host/%s@%s' % (host, realm)
], env=env)
except CalledProcessError:
root_logger.debug(
"Attempt %d/%d failed." % (n_attempts, max_attempts))
if n_attempts >= max_attempts:
raise
time.sleep(1)
else:
root_logger.debug(
"Attempt %d/%d succeeded." % (n_attempts, max_attempts))
return
def configure_certmonger(fstore, subject_base, cli_realm, hostname, options,
remote_env):
started = True
principal = 'host/%s@%s' % (hostname, cli_realm)
messagebus = ipaservices.knownservices.messagebus
try:
messagebus.start()
except Exception, e:
log_service_error(messagebus.service_name, 'start', e)
# Ensure that certmonger has been started at least once to generate the
# cas files in /var/lib/certmonger/cas.
cmonger = ipaservices.knownservices.certmonger
try:
cmonger.restart()
except Exception, e:
log_service_error(cmonger.service_name, 'restart', e)
if options.hostname:
# It needs to be stopped if we touch them
try:
cmonger.stop()
except Exception, e:
log_service_error(cmonger.service_name, 'stop', e)
# If the hostname is explicitly set then we need to tell certmonger
# which principal name to use when requesting certs.
certmonger.add_principal_to_cas(principal)
try:
cmonger.restart()
except Exception, e:
log_service_error(cmonger.service_name, 'restart', e)
root_logger.warning(
"Automatic certificate management will not be available")
started = False
try:
cmonger.enable()
except Exception, e:
root_logger.error(
"Failed to configure automatic startup of the %s daemon: %s",
cmonger.service_name, str(e))
root_logger.warning(
"Automatic certificate management will not be available")
# Request our host cert
if remote_env['enable_ra']:
if started:
client_nss_nickname = client_nss_nickname_format % hostname
subject = DN(('CN', hostname), subject_base)
try:
run(["ipa-getcert", "request", "-d", "/etc/pki/nssdb",
"-n", client_nss_nickname, "-N", str(subject),
"-K", principal])
except Exception:
root_logger.error("%s request for host certificate failed",
cmonger.service_name)
else:
root_logger.warning(
"A RA is not configured on the server. "
"Not requesting host certificate.")
def configure_sssd_conf(fstore, cli_realm, cli_domain, cli_server, options, client_domain, client_hostname):
try:
sssdconfig = SSSDConfig.SSSDConfig()
sssdconfig.import_config()
except Exception, e:
if os.path.exists("/etc/sssd/sssd.conf") and options.preserve_sssd:
# SSSD config is in place but we are unable to read it
# In addition, we are instructed to preserve it
# This all means we can't use it and have to bail out
root_logger.error(
"SSSD config exists but cannot be parsed: %s", str(e))
root_logger.error(
"Was instructed to preserve existing SSSD config")
root_logger.info("Correct errors in /etc/sssd/sssd.conf and " +
"re-run installation")
return 1
# SSSD configuration does not exist or we are not asked to preserve it, create new one
# We do make new SSSDConfig instance because IPAChangeConf-derived classes have no
# means to reset their state and ParseError exception could come due to parsing
# error from older version which cannot be upgraded anymore, leaving sssdconfig
# instance practically unusable
# Note that we already backed up sssd.conf before going into this routine
if isinstance(e, IOError):
pass
else:
# It was not IOError so it must have been parsing error
root_logger.error("Unable to parse existing SSSD config. " +
"As option --preserve-sssd was not specified, new config " +
"will override the old one.")
root_logger.info("The old /etc/sssd/sssd.conf is backed up and " +
"will be restored during uninstall.")
root_logger.info("New SSSD config will be created")
sssdconfig = SSSDConfig.SSSDConfig()
sssdconfig.new_config()
try:
domain = sssdconfig.new_domain(cli_domain)
except SSSDConfig.DomainAlreadyExistsError:
root_logger.info("Domain %s is already configured in existing SSSD " +
"config, creating a new one.", cli_domain)
root_logger.info("The old /etc/sssd/sssd.conf is backed up and will " +
"be restored during uninstall.")
sssdconfig = SSSDConfig.SSSDConfig()
sssdconfig.new_config()
domain = sssdconfig.new_domain(cli_domain)
ssh_dir = ipaservices.knownservices.sshd.get_config_dir()
ssh_config = os.path.join(ssh_dir, 'ssh_config')
sshd_config = os.path.join(ssh_dir, 'sshd_config')
if (options.conf_ssh and file_exists(ssh_config)) or (options.conf_sshd and file_exists(sshd_config)):
try:
sssdconfig.new_service('ssh')
except SSSDConfig.ServiceAlreadyExists:
pass
except SSSDConfig.ServiceNotRecognizedError:
root_logger.error("Unable to activate the SSH service in SSSD config.")
root_logger.info(
"Please make sure you have SSSD built with SSH support installed.")
root_logger.info(
"Configure SSH support manually in /etc/sssd/sssd.conf.")
sssdconfig.activate_service('ssh')
if options.conf_sudo:
# Activate the service in the SSSD config
try:
sssdconfig.new_service('sudo')
except SSSDConfig.ServiceAlreadyExists:
pass
except SSSDConfig.ServiceNotRecognizedError:
root_logger.error("Unable to activate the SUDO service in "
"SSSD config.")
sssdconfig.activate_service('sudo')
configure_nsswitch_database(fstore, 'sudoers', ['sss'],
default_value=['files'])
domain.add_provider('ipa', 'id')
#add discovery domain if client domain different from server domain
if cli_domain != client_domain:
domain.set_option('dns_discovery_domain', cli_domain)
if not options.on_master:
if options.primary:
domain.set_option('ipa_server', ', '.join(cli_server))
else:
domain.set_option('ipa_server', '_srv_, %s' % ', '.join(cli_server))
else:
# the master should only use itself for Kerberos
domain.set_option('ipa_server', cli_server[0])
domain.set_option('ipa_domain', cli_domain)
domain.set_option('ipa_hostname', client_hostname)
if cli_domain.lower() != cli_realm.lower():
domain.set_option('krb5_realm', cli_realm)
# Might need this if /bin/hostname doesn't return a FQDN
#domain.set_option('ipa_hostname', 'client.example.com')
domain.add_provider('ipa', 'auth')
domain.add_provider('ipa', 'chpass')
if not options.permit:
domain.add_provider('ipa', 'access')
else:
domain.add_provider('permit', 'access')
domain.set_option('cache_credentials', True)
# SSSD will need TLS for checking if ipaMigrationEnabled attribute is set
# Note that SSSD will force StartTLS because the channel is later used for
# authentication as well if password migration is enabled. Thus set the option
# unconditionally.
domain.set_option('ldap_tls_cacert', CACERT)
if options.dns_updates:
domain.set_option('ipa_dyndns_update', True)
if options.krb5_offline_passwords:
domain.set_option('krb5_store_password_if_offline', True)
domain.set_active(True)
sssdconfig.save_domain(domain)
sssdconfig.write("/etc/sssd/sssd.conf")
return 0
def change_ssh_config(filename, changes, sections):
if not changes:
return True
try:
f = open(filename, 'r')
except IOError, e:
root_logger.error("Failed to open '%s': %s", filename, str(e))
return False
change_keys = tuple(key.lower() for key in changes)
section_keys = tuple(key.lower() for key in sections)
lines = []
for line in f:
line = line.rstrip('\n')
pline = line.strip()
if not pline or pline.startswith('#'):
lines.append(line)
continue
option = pline.split()[0].lower()
if option in section_keys:
lines.append(line)
break
if option in change_keys:
line = '#' + line
lines.append(line)
for option, value in changes.items():
if value is not None:
lines.append('%s %s' % (option, value))
for line in f:
line = line.rstrip('\n')
lines.append(line)
lines.append('')
f.close()
try:
f = open(filename, 'w')
except IOError, e:
root_logger.error("Failed to open '%s': %s", filename, str(e))
return False
f.write('\n'.join(lines))
f.close()
return True
def configure_ssh_config(fstore, options):
ssh_dir = ipaservices.knownservices.sshd.get_config_dir()
ssh_config = os.path.join(ssh_dir, 'ssh_config')
if not file_exists(ssh_config):
root_logger.info("%s not found, skipping configuration" % ssh_config)
return
fstore.backup_file(ssh_config)
changes = {
'PubkeyAuthentication': 'yes',
}
if options.trust_sshfp:
changes['VerifyHostKeyDNS'] = 'yes'
changes['HostKeyAlgorithms'] = 'ssh-rsa,ssh-dss'
elif options.sssd and file_exists('/usr/bin/sss_ssh_knownhostsproxy'):
changes['ProxyCommand'] = '/usr/bin/sss_ssh_knownhostsproxy -p %p %h'
changes['GlobalKnownHostsFile'] = '/var/lib/sss/pubconf/known_hosts'
change_ssh_config(ssh_config, changes, ['Host'])
root_logger.info('Configured %s', ssh_config)
def configure_sshd_config(fstore, options):
sshd = ipaservices.knownservices.sshd
ssh_dir = sshd.get_config_dir()
sshd_config = os.path.join(ssh_dir, 'sshd_config')
if not file_exists(sshd_config):
root_logger.info("%s not found, skipping configuration" % sshd_config)
return
fstore.backup_file(sshd_config)
changes = {
'PubkeyAuthentication': 'yes',
'KerberosAuthentication': 'no',
'GSSAPIAuthentication': 'yes',
'UsePAM': 'yes',
}
if options.sssd and file_exists('/usr/bin/sss_ssh_authorizedkeys'):
(stdout, stderr, retcode) = ipautil.run(['sshd', '-t', '-f', '/dev/null', '-o', 'AuthorizedKeysCommand='], raiseonerr=False)
if retcode == 0:
changes['AuthorizedKeysCommand'] = '/usr/bin/sss_ssh_authorizedkeys'
changes['AuthorizedKeysCommandRunAs'] = None
else:
(stdout, stderr, retcode) = ipautil.run(['sshd', '-t', '-f', '/dev/null', '-o', 'PubKeyAgent='], raiseonerr=False)
if retcode == 0:
changes['PubKeyAgent'] = '/usr/bin/sss_ssh_authorizedkeys %u'
changes['PubkeyAgentRunAs'] = None
else:
root_logger.warning("Installed OpenSSH server does not " +
"support dynamically loading authorized user keys. " +
"Public key authentication of IPA users will not be " +
"available.")
change_ssh_config(sshd_config, changes, ['Match'])
root_logger.info('Configured %s', sshd_config)
if sshd.is_running():
try:
sshd.restart()
except Exception, e:
log_service_error(sshd.service_name, 'restart', e)
def configure_nisdomain(options, domain):
domain = options.nisdomain or domain
root_logger.info('Configuring %s as NIS domain' % domain)
nis_domain_name = ''
# First backup the old NIS domain name
if os.path.exists('/bin/nisdomainname'):
try:
nis_domain_name, _, _ = ipautil.run(['/bin/nisdomainname'])
except CalledProcessError, e:
pass
if nis_domain_name.strip() == '(none)':
# RHEL-6.x nisdomainname returns "(none)" when it is unset
nis_domain_name = ''
statestore.backup_state('network', 'nisdomain', nis_domain_name)
# Set the new NIS domain name
set_nisdomain(domain)
def unconfigure_nisdomain():
# Set the nisdomain permanent and current nisdomain configuration as it was
if statestore.has_state('network'):
old_nisdomain = statestore.restore_state('network','nisdomain') or ''
if old_nisdomain:
root_logger.info('Restoring %s as NIS domain.' % old_nisdomain)
else:
root_logger.info('Unconfiguring the NIS domain.')
set_nisdomain(old_nisdomain)
def set_nisdomain(nisdomain):
# Let authconfig setup the permanent configuration
auth_config = ipaservices.authconfig()
auth_config.add_parameter("nisdomain", nisdomain)
auth_config.add_option("update")
auth_config.execute()
if os.path.exists('/bin/nisdomainname'):
try:
ipautil.run(['/bin/nisdomainname', nisdomain])
except CalledProcessError, e:
root_logger.warning("Failed to set NIS domain.")
def resolve_ipaddress(server):
""" Connect to the server's LDAP port in order to determine what ip
address this machine uses as "public" ip (relative to the server).
Returns a tuple with the IP address and address family when
connection was successful. Socket error is raised otherwise.
"""
last_socket_error = None
for res in socket.getaddrinfo(server, 389, socket.AF_UNSPEC,
socket.SOCK_STREAM):
af, socktype, proto, canonname, sa = res
try:
s = socket.socket(af, socktype, proto)
except socket.error, e:
last_socket_error = e
s = None
continue
try:
s.connect(sa)
sockname = s.getsockname()
# For both IPv4 and IPv6 own IP address is always the first item
return (sockname[0], af)
except socket.error, e:
last_socket_error = e
finally:
if s:
s.close()
if last_socket_error is not None:
raise last_socket_error # pylint: disable=E0702
def do_nsupdate(update_txt):
root_logger.debug("Writing nsupdate commands to %s:", UPDATE_FILE)
root_logger.debug("%s", update_txt)
update_fd = file(UPDATE_FILE, "w")
update_fd.write(update_txt)
update_fd.flush()
update_fd.close()
result = False
try:
ipautil.run(['/usr/bin/nsupdate', '-g', UPDATE_FILE])
result = True
except CalledProcessError, e:
root_logger.debug('nsupdate failed: %s', str(e))
try:
os.remove(UPDATE_FILE)
except Exception:
pass
return result
UPDATE_TEMPLATE_A = """
zone $ZONE.
update delete $HOSTNAME. IN A
send
update add $HOSTNAME. $TTL IN A $IPADDRESS
send
"""
UPDATE_TEMPLATE_AAAA = """
zone $ZONE.
update delete $HOSTNAME. IN AAAA
send
update add $HOSTNAME. $TTL IN AAAA $IPADDRESS
send
"""
UPDATE_FILE = "/etc/ipa/.dns_update.txt"
CCACHE_FILE = "/etc/ipa/.dns_ccache"
def update_dns(server, hostname):
try:
(ip, af) = resolve_ipaddress(server)
except socket.gaierror, e:
root_logger.debug("update_dns: could not connect to server: %s", e)
root_logger.error("Cannot update DNS records! "
"Failed to connect to server '%s'.", server)
return
sub_dict = dict(HOSTNAME=hostname,
IPADDRESS=ip,
TTL=1200,
ZONE='.'.join(hostname.split('.')[1:])
)
if af == socket.AF_INET:
template = UPDATE_TEMPLATE_A
elif af == socket.AF_INET6:
template = UPDATE_TEMPLATE_AAAA
else:
root_logger.info("Failed to determine this machine's ip address.")
root_logger.warning("Failed to update DNS A record.")
return
update_txt = ipautil.template_str(template, sub_dict)
if do_nsupdate(update_txt):
root_logger.info("DNS server record set to: %s -> %s", hostname, ip)
else:
root_logger.error("Failed to update DNS records.")
def client_dns(server, hostname, dns_updates=False):
dns_ok = ipautil.is_host_resolvable(hostname)
if not dns_ok:
root_logger.warning("Hostname (%s) not found in DNS", hostname)
if dns_updates or not dns_ok:
update_dns(server, hostname)
def update_ssh_keys(server, hostname, ssh_dir, create_sshfp):
pubkeys = []
for basename in os.listdir(ssh_dir):
if not basename.endswith('.pub'):
continue
filename = os.path.join(ssh_dir, basename)
try:
f = open(filename, 'r')
except IOError, e:
root_logger.warning("Failed to open '%s': %s", filename, str(e))
continue
for line in f:
line = line[:-1].lstrip()
if not line or line.startswith('#'):
continue
try:
pubkey = SSHPublicKey(line)
except ValueError, UnicodeDecodeError:
continue
root_logger.info("Adding SSH public key from %s", filename)
pubkeys.append(pubkey)
f.close()
try:
result = api.Command['host_mod'](unicode(hostname),
ipasshpubkey=[pk.openssh() for pk in pubkeys],
updatedns=False
)
except errors.EmptyModlist:
pass
except StandardError, e:
root_logger.info("host_mod: %s", str(e))
root_logger.warning("Failed to upload host SSH public keys.")
return
if create_sshfp:
zone = '.'.join(hostname.split('.')[1:])
ttl = 1200
update_txt = 'zone %s.\nupdate delete %s. IN SSHFP\nsend\n' % (zone, hostname)
for pubkey in pubkeys:
sshfp = pubkey.fingerprint_dns_sha1()
if sshfp is not None:
update_txt += 'update add %s. %s IN SSHFP %s\n' % (hostname, ttl, sshfp)
update_txt += 'send\n'
if not do_nsupdate(update_txt):
root_logger.warning("Could not update DNS SSHFP records.")
def print_port_conf_info():
root_logger.info(
"Please make sure the following ports are opened "
"in the firewall settings:\n"
" TCP: 80, 88, 389\n"
" UDP: 88 (at least one of TCP/UDP ports 88 has to be open)\n"
"Also note that following ports are necessary for ipa-client "
"working properly after enrollment:\n"
" TCP: 464\n"
" UDP: 464, 123 (if NTP enabled)")
def get_ca_cert_from_file(url):
'''
Get the CA cert from a user supplied file and write it into the
CACERT file.
Raises errors.NoCertificateError if unable to read cert.
Raises errors.FileError if unable to write cert.
'''
# pylint: disable=E1101
try:
parsed = urlparse.urlparse(url, 'file')
except Exception, e:
raise errors.FileError("unable to parse file url '%s'" % (url))
if parsed.scheme != 'file':
raise errors.FileError("url is not a file scheme '%s'" % (url))
filename = parsed.path
if not os.path.exists(filename):
raise errors.FileError("file '%s' does not exist" % (filename))
if not os.path.isfile(filename):
raise errors.FileError("file '%s' is not a file" % (filename))
root_logger.debug("trying to retrieve CA cert from file %s", filename)
try:
cert = x509.load_certificate_from_file(filename)
except Exception, e:
raise errors.NoCertificateError(entry=filename)
try:
x509.write_certificate(cert.der_data, CACERT)
except Exception, e:
raise errors.FileError(reason =
u"cannot write certificate file '%s': %s" % (CACERT, e))
else:
del(cert)
def get_ca_cert_from_http(url, ca_file, warn=True):
'''
Use HTTP to retrieve the CA cert and write it into the CACERT file.
This is insecure and should be avoided.
Raises errors.NoCertificateError if unable to retrieve and write cert.
'''
if warn:
root_logger.warning("Downloading the CA certificate via HTTP, " +
"this is INSECURE")
root_logger.debug("trying to retrieve CA cert via HTTP from %s", url)
try:
run(["/usr/bin/wget", "-O", ca_file, url])
except CalledProcessError, e:
raise errors.NoCertificateError(entry=url)
def get_ca_cert_from_ldap(url, basedn, ca_file):
'''
Retrieve th CA cert from the LDAP server by binding to the
server with GSSAPI using the current Kerberos credentials.
Write the retrieved cert into the CACERT file.
Raises errors.NoCertificateError if cert is not found.
Raises errors.NetworkError if LDAP connection can't be established.
Raises errors.LDAPError for any other generic LDAP error.
Raises errors.OnlyOneValueAllowed if more than one cert is found.
Raises errors.FileError if unable to write cert.
'''
ca_cert_attr = 'cAcertificate;binary'
dn = DN(('cn', 'CAcert'), ('cn', 'ipa'), ('cn', 'etc'), basedn)
SASL_GSSAPI = ldap.sasl.sasl({},'GSSAPI')
root_logger.debug("trying to retrieve CA cert via LDAP from %s", url)
conn = ldap.initialize(url)
conn.set_option(ldap.OPT_X_SASL_NOCANON, ldap.OPT_ON)
try:
conn.sasl_interactive_bind_s('', SASL_GSSAPI)
result = conn.search_st(str(dn), ldap.SCOPE_BASE, 'objectclass=pkiCA',
[ca_cert_attr], timeout=10)
except ldap.NO_SUCH_OBJECT, e:
root_logger.debug("get_ca_cert_from_ldap() error: %s",
convert_ldap_error(e))
raise errors.NoCertificateError(entry=url)
except ldap.SERVER_DOWN, e:
root_logger.debug("get_ca_cert_from_ldap() error: %s",
convert_ldap_error(e))
raise errors.NetworkError(uri=url, error=str(e))
except Exception, e:
root_logger.debug("get_ca_cert_from_ldap() error: %s",
convert_ldap_error(e))
raise errors.LDAPError(str(e))
if len(result) != 1:
raise errors.OnlyOneValueAllowed(attr=ca_cert_attr)
attrs = result[0][1]
try:
der_cert = attrs[ca_cert_attr][0]
except KeyError:
raise errors.NoCertificateError(entry=ca_cert_attr)
try:
x509.write_certificate(der_cert, ca_file)
except Exception, e:
raise errors.FileError(reason =
u"cannot write certificate file '%s': %s" % (ca_file, e))
def validate_new_ca_cert(existing_ca_cert, ca_file, ask, override=False):
try:
new_ca_cert = x509.load_certificate_from_file(ca_file)
except Exception, e:
raise errors.FileError(
"Unable to read new ca cert '%s': %s" % (ca_file, e))
if existing_ca_cert is None:
root_logger.info(
cert_summary("Successfully retrieved CA cert", new_ca_cert))
return
if existing_ca_cert.der_data != new_ca_cert.der_data:
root_logger.warning(
"The CA cert available from the IPA server does not match the\n"
"local certificate available at %s" % CACERT)
root_logger.warning(
cert_summary("Existing CA cert:", existing_ca_cert))
root_logger.warning(
cert_summary("Retrieved CA cert:", new_ca_cert))
if override:
root_logger.warning("Overriding existing CA cert\n")
elif not ask or not user_input(
"Do you want to replace the local certificate with the CA\n"
"certificate retrieved from the IPA server?", True):
raise errors.CertificateInvalidError(name='Retrieved CA')
else:
root_logger.debug(
"Existing CA cert and Retrieved CA cert are identical")
os.remove(ca_file)
del(existing_ca_cert)
del(new_ca_cert)
def get_ca_cert(fstore, options, server, basedn):
'''
Examine the different options and determine a method for obtaining
the CA cert.
If successful the CA cert will have been written into CACERT.
Raises errors.NoCertificateError if not successful.
The logic for determining how to load the CA cert is as follow:
In the OTP case (not -p and -w):
1. load from user supplied cert file
2. else load from HTTP
In the 'user_auth' case ((-p and -w) or interactive):
1. load from user supplied cert file
2. load from LDAP using SASL/GSS/Krb5 auth
(provides mutual authentication, integrity and security)
3. if LDAP failed and interactive ask for permission to
use insecure HTTP (default: No)
In the unattended case:
1. load from user supplied cert file
2. load from HTTP if --force specified else fail
In all cases if HTTP is used emit warning message
'''
ca_file = CACERT + ".new"
def ldap_url():
return urlparse.urlunparse(('ldap', ipautil.format_netloc(server),
'', '', '', ''))
def file_url():
return urlparse.urlunparse(('file', '', options.ca_cert_file,
'', '', ''))
def http_url():
return urlparse.urlunparse(('http', ipautil.format_netloc(server),
'/ipa/config/ca.crt', '', '', ''))
interactive = not options.unattended
otp_auth = options.principal is None and options.password is not None
existing_ca_cert = None
if options.ca_cert_file:
url = file_url()
try:
get_ca_cert_from_file(url)
except Exception, e:
root_logger.debug(e)
raise errors.NoCertificateError(entry=url)
root_logger.debug("CA cert provided by user, use it!")
else:
if os.path.exists(CACERT):
if os.path.isfile(CACERT):
try:
existing_ca_cert = x509.load_certificate_from_file(CACERT)
except Exception, e:
raise errors.FileError(reason=u"Unable to load existing" +
" CA cert '%s': %s" % (CACERT, e))
else:
raise errors.FileError(reason=u"Existing ca cert '%s' is " +
"not a plain file" % (CACERT))
if otp_auth:
if existing_ca_cert:
root_logger.info("OTP case, CA cert preexisted, use it")
else:
url = http_url()
override = not interactive
if interactive and not user_input(
"Do you want download the CA cert from " + url + " ?\n"
"(this is INSECURE)", False):
raise errors.NoCertificateError(message=u"HTTP certificate"
" download declined by user")
try:
get_ca_cert_from_http(url, ca_file, override)
except Exception, e:
root_logger.debug(e)
raise errors.NoCertificateError(entry=url)
try:
validate_new_ca_cert(existing_ca_cert, ca_file,
False, override)
except Exception, e:
os.unlink(ca_file)
raise
else:
# Auth with user credentials
url = ldap_url()
try:
get_ca_cert_from_ldap(url, basedn, ca_file)
try:
validate_new_ca_cert(existing_ca_cert,
ca_file, interactive)
except Exception, e:
os.unlink(ca_file)
raise
except (errors.NoCertificateError, errors.LDAPError), e:
root_logger.debug(str(e))
url = http_url()
if existing_ca_cert:
root_logger.warning(
"Unable to download CA cert from LDAP\n"
"but found preexisting cert, using it.\n")
elif interactive and not user_input(
"Unable to download CA cert from LDAP.\n"
"Do you want to download the CA cert from " + url + "?\n"
"(this is INSECURE)", False):
raise errors.NoCertificateError(message=u"HTTP "
"certificate download declined by user")
elif not interactive and not options.force:
root_logger.error(
"In unattended mode without a One Time Password "
"(OTP) or without --ca-cert-file\nYou must specify"
" --force to retrieve the CA cert using HTTP")
raise errors.NoCertificateError(message=u"HTTP "
"certificate download requires --force")
else:
try:
get_ca_cert_from_http(url, ca_file)
except Exception, e:
root_logger.debug(e)
raise errors.NoCertificateError(entry=url)
try:
validate_new_ca_cert(existing_ca_cert,
ca_file, interactive)
except Exception, e:
os.unlink(ca_file)
raise
except Exception, e:
root_logger.debug(str(e))
raise errors.NoCertificateError(entry=url)
# We should have a cert now, move it to the canonical place
if os.path.exists(ca_file):
os.rename(ca_file, CACERT)
elif existing_ca_cert is None:
raise errors.InternalError(u"expected CA cert file '%s' to "
u"exist, but it's absent" % (ca_file))
# Make sure the file permissions are correct
try:
os.chmod(CACERT, 0644)
except Exception, e:
raise errors.FileError(reason=u"Unable set permissions on ca "
u"cert '%s': %s" % (CACERT, e))
def install(options, env, fstore, statestore):
dnsok = False
cli_domain = None
cli_server = None
subject_base = None
cli_domain_source = 'Unknown source'
cli_server_source = 'Unknown source'
if options.unattended and (options.password is None and options.principal is None and options.prompt_password is False) and not options.on_master:
root_logger.error("One of password and principal are required.")
return CLIENT_INSTALL_ERROR
if options.hostname:
hostname = options.hostname
hostname_source = 'Provided as option'
else:
hostname = socket.getfqdn()
hostname_source = "Machine's FQDN"
if hostname != hostname.lower():
root_logger.error(
"Invalid hostname '%s', must be lower-case.", hostname)
return CLIENT_INSTALL_ERROR
if (hostname == 'localhost') or (hostname == 'localhost.localdomain'):
root_logger.error("Invalid hostname, '%s' must not be used.", hostname)
return CLIENT_INSTALL_ERROR
# when installing with '--no-sssd' option, check whether nss-ldap is installed
if not options.sssd:
(nssldap_installed, nosssd_files) = nssldap_exists()
if not nssldap_installed:
root_logger.error("One of these packages must be installed: " +
"nss_ldap or nss-pam-ldapd")
return CLIENT_INSTALL_ERROR
# Create the discovery instance
ds = ipadiscovery.IPADiscovery()
ret = ds.search(domain=options.domain, servers=options.server, realm=options.realm_name, hostname=hostname, ca_cert_path=get_cert_path(options.ca_cert_file))
if ret == ipadiscovery.BAD_HOST_CONFIG:
root_logger.error("Can't get the fully qualified name of this host")
root_logger.info("Check that the client is properly configured")
return CLIENT_INSTALL_ERROR
if ret == ipadiscovery.NOT_FQDN:
root_logger.error("%s is not a fully-qualified hostname", hostname)
return CLIENT_INSTALL_ERROR
if ret in (ipadiscovery.NO_LDAP_SERVER, ipadiscovery.NOT_IPA_SERVER) \
or not ds.domain:
if ret == ipadiscovery.NO_LDAP_SERVER:
if ds.server:
root_logger.debug("%s is not an LDAP server" % ds.server)
else:
root_logger.debug("No LDAP server found")
elif ret == ipadiscovery.NOT_IPA_SERVER:
if ds.server:
root_logger.debug("%s is not an IPA server" % ds.server)
else:
root_logger.debug("No IPA server found")
else:
root_logger.debug("Domain not found")
if options.domain:
cli_domain = options.domain
cli_domain_source = 'Provided as option'
elif options.unattended:
root_logger.error(
"Unable to discover domain, not provided on command line")
return CLIENT_INSTALL_ERROR
else:
root_logger.info(
"DNS discovery failed to determine your DNS domain")
cli_domain = user_input("Provide the domain name of your IPA server (ex: example.com)", allow_empty = False)
cli_domain_source = 'Provided interactively'
root_logger.debug(
"will use interactively provided domain: %s", cli_domain)
ret = ds.search(domain=cli_domain, servers=options.server, hostname=hostname, ca_cert_path=get_cert_path(options.ca_cert_file))
if not cli_domain:
if ds.domain:
cli_domain = ds.domain
cli_domain_source = ds.domain_source
root_logger.debug("will use discovered domain: %s", cli_domain)
client_domain = hostname[hostname.find(".")+1:]
if ret in (ipadiscovery.NO_LDAP_SERVER, ipadiscovery.NOT_IPA_SERVER) \
or not ds.server:
root_logger.debug("IPA Server not found")
if options.server:
cli_server = options.server
cli_server_source = 'Provided as option'
elif options.unattended:
root_logger.error("Unable to find IPA Server to join")
return CLIENT_INSTALL_ERROR
else:
root_logger.debug("DNS discovery failed to find the IPA Server")
cli_server = [user_input("Provide your IPA server name (ex: ipa.example.com)", allow_empty = False)]
cli_server_source = 'Provided interactively'
root_logger.debug("will use interactively provided server: %s", cli_server[0])
ret = ds.search(domain=cli_domain, servers=cli_server, hostname=hostname, ca_cert_path=get_cert_path(options.ca_cert_file))
else:
# Only set dnsok to True if we were not passed in one or more servers
# and if DNS discovery actually worked.
if not options.server:
(server, domain) = ds.check_domain(ds.domain, set(), "Validating DNS Discovery")
if server and domain:
root_logger.debug("DNS validated, enabling discovery")
dnsok = True
else:
root_logger.debug("DNS discovery failed, disabling discovery")
else:
root_logger.debug("Using servers from command line, disabling DNS discovery")
if not cli_server:
if options.server:
cli_server = ds.servers
cli_server_source = 'Provided as option'
root_logger.debug("will use provided server: %s", ', '.join(options.server))
elif ds.server:
cli_server = ds.servers
cli_server_source = ds.server_source
root_logger.debug("will use discovered server: %s", cli_server[0])
if ret == ipadiscovery.NOT_IPA_SERVER:
root_logger.error("%s is not an IPA v2 Server.", cli_server[0])
print_port_conf_info()
root_logger.debug("(%s: %s)", cli_server[0], cli_server_source)
return CLIENT_INSTALL_ERROR
if ret == ipadiscovery.NO_ACCESS_TO_LDAP:
root_logger.warning("Anonymous access to the LDAP server is disabled.")
root_logger.info("Proceeding without strict verification.")
root_logger.info("Note: This is not an error if anonymous access " +
"has been explicitly restricted.")
ret = 0
if ret == ipadiscovery.NO_TLS_LDAP:
root_logger.warning("The LDAP server requires TLS is but we do not " +
"have the CA.")
root_logger.info("Proceeding without strict verification.")
ret = 0
if ret != 0:
root_logger.error("Failed to verify that %s is an IPA Server.",
cli_server[0])
root_logger.error("This may mean that the remote server is not up "
"or is not reachable due to network or firewall settings.")
print_port_conf_info()
root_logger.debug("(%s: %s)", cli_server[0], cli_server_source)
return CLIENT_INSTALL_ERROR
cli_kdc = ds.kdc
if dnsok and not cli_kdc:
root_logger.error("DNS domain '%s' is not configured for automatic " +
"KDC address lookup.", ds.realm.lower())
root_logger.debug("(%s: %s)", ds.realm, ds.realm_source)
root_logger.error("KDC address will be set to fixed value.")
if dnsok:
root_logger.info("Discovery was successful!")
elif not options.unattended:
if not options.server:
root_logger.warning("The failure to use DNS to find your IPA" +
" server indicates that your resolv.conf file is not properly" +
" configured.")
root_logger.info("Autodiscovery of servers for failover cannot work " +
"with this configuration.")
root_logger.info("If you proceed with the installation, services " +
"will be configured to always access the discovered server for " +
"all operations and will not fail over to other servers in case " +
"of failure.")
if not user_input("Proceed with fixed values and no DNS discovery?", False):
return CLIENT_INSTALL_ERROR
cli_realm = ds.realm
cli_realm_source = ds.realm_source
root_logger.debug("will use discovered realm: %s", cli_realm)
if options.realm_name and options.realm_name != cli_realm:
root_logger.error(
"The provided realm name [%s] does not match discovered one [%s]",
options.realm_name, cli_realm)
root_logger.debug("(%s: %s)", cli_realm, cli_realm_source)
return CLIENT_INSTALL_ERROR
cli_basedn = ds.basedn
cli_basedn_source = ds.basedn_source
root_logger.debug("will use discovered basedn: %s", cli_basedn)
subject_base = DN(('O', cli_realm))
root_logger.info("Hostname: %s", hostname)
root_logger.debug("Hostname source: %s", hostname_source)
root_logger.info("Realm: %s", cli_realm)
root_logger.debug("Realm source: %s", cli_realm_source)
root_logger.info("DNS Domain: %s", cli_domain)
root_logger.debug("DNS Domain source: %s", cli_domain_source)
root_logger.info("IPA Server: %s", ', '.join(cli_server))
root_logger.debug("IPA Server source: %s", cli_server_source)
root_logger.info("BaseDN: %s", cli_basedn)
root_logger.debug("BaseDN source: %s", cli_basedn_source)
print
if not options.unattended and not user_input("Continue to configure the system with these values?", False):
return CLIENT_INSTALL_ERROR
if not options.on_master:
# Try removing old principals from the keytab
try:
ipautil.run(['/usr/sbin/ipa-rmkeytab',
'-k', '/etc/krb5.keytab', '-r', cli_realm])
except CalledProcessError, e:
if e.returncode not in (3, 5):
# 3 - Unable to open keytab
# 5 - Principal name or realm not found in keytab
root_logger.error("Error trying to clean keytab: " +
"/usr/sbin/ipa-rmkeytab returned %s" % e.returncode)
else:
root_logger.info("Removed old keys for realm %s from %s" % (
cli_realm, '/etc/krb5.keytab'))
if options.hostname and not options.on_master and options.conf_ntp:
# configure /etc/sysconfig/network to contain the hostname we set.
# skip this step when run by ipa-server-install as it always configures
# hostname if different from system hostname
ipaservices.backup_and_replace_hostname(fstore, statestore, options.hostname)
if not options.unattended:
if options.principal is None and options.password is None and options.prompt_password is False:
options.principal = user_input("User authorized to enroll computers", allow_empty=False)
root_logger.debug(
"will use principal provided as option: %s", options.principal)
if not options.on_master:
nolog = tuple()
# First test out the kerberos configuration
try:
# Attempt to sync time with IPA server.
# We assume that NTP servers are discoverable through SRV records in the DNS
# If that fails, we try to sync directly with IPA server, assuming it runs NTP
root_logger.info('Synchronizing time with KDC...')
ntp_servers = ds.ipadns_search_srv(cli_domain, '_ntp._udp', None, break_on_first=False)
synced_ntp = False
if ntp_servers:
for s in ntp_servers:
synced_ntp = ipaclient.ntpconf.synconce_ntp(s)
if synced_ntp:
break
if not synced_ntp:
synced_ntp = ipaclient.ntpconf.synconce_ntp(cli_server[0])
if not synced_ntp:
root_logger.warning("Unable to sync time with IPA NTP " +
"server, assuming the time is in sync. Please check " +
"that 123 UDP port is opened.")
(krb_fd, krb_name) = tempfile.mkstemp()
os.close(krb_fd)
if configure_krb5_conf(
cli_realm=cli_realm,
cli_domain=cli_domain,
cli_server=cli_server,
cli_kdc=cli_kdc,
dnsok=False,
options=options,
filename=krb_name,
client_domain=client_domain):
root_logger.error("Test kerberos configuration failed")
return CLIENT_INSTALL_ERROR
env['KRB5_CONFIG'] = krb_name
(ccache_fd, ccache_name) = tempfile.mkstemp()
os.close(ccache_fd)
env['KRB5CCNAME'] = os.environ['KRB5CCNAME'] = ccache_name
join_args = ["/usr/sbin/ipa-join", "-s", cli_server[0], "-b", str(realm_to_suffix(cli_realm))]
if options.debug:
join_args.append("-d")
env['XMLRPC_TRACE_CURL'] = 'yes'
if options.hostname:
join_args.append("-h")
join_args.append(options.hostname)
if options.force_join:
join_args.append("-f")
if options.principal is not None:
stdin = None
principal = options.principal
if principal.find('@') == -1:
principal = '%s@%s' % (principal, cli_realm)
if options.password is not None:
stdin = options.password
else:
if not options.unattended:
try:
stdin = getpass.getpass("Password for %s: " % principal)
except EOFError:
stdin = None
if not stdin:
root_logger.error(
"Password must be provided for %s.", principal)
return CLIENT_INSTALL_ERROR
else:
if sys.stdin.isatty():
root_logger.error("Password must be provided in " +
"non-interactive mode.")
root_logger.info("This can be done via " +
"echo password | ipa-client-install ... " +
"or with the -w option.")
return CLIENT_INSTALL_ERROR
else:
stdin = sys.stdin.readline()
(stderr, stdout, returncode) = run(["kinit", principal], raiseonerr=False, stdin=stdin, env=env)
if returncode != 0:
root_logger.error("Kerberos authentication failed")
root_logger.info("%s", stdout)
print_port_conf_info()
return CLIENT_INSTALL_ERROR
elif options.password:
nolog = (options.password,)
join_args.append("-w")
join_args.append(options.password)
elif options.prompt_password:
if options.unattended:
root_logger.error(
"Password must be provided in non-interactive mode")
return CLIENT_INSTALL_ERROR
try:
password = getpass.getpass("Password: ")
except EOFError:
password = None
if not password:
root_logger.error("Password must be provided.")
return CLIENT_INSTALL_ERROR
join_args.append("-w")
join_args.append(password)
nolog = (password,)
# Get the CA certificate
try:
os.environ['KRB5_CONFIG'] = env['KRB5_CONFIG']
get_ca_cert(fstore, options, cli_server[0], cli_basedn)
del os.environ['KRB5_CONFIG']
except Exception, e:
root_logger.error("Cannot obtain CA certificate\n%s", e)
return CLIENT_INSTALL_ERROR
# Now join the domain
(stdout, stderr, returncode) = run(join_args, raiseonerr=False, env=env, nolog=nolog)
if returncode != 0:
root_logger.error("Joining realm failed: %s", stderr)
if not options.force:
return CLIENT_INSTALL_ERROR
root_logger.info("Use ipa-getkeytab to obtain a host " +
"principal for this server.")
else:
root_logger.info("Enrolled in IPA realm %s", cli_realm)
start = stderr.find('Certificate subject base is: ')
if start >= 0:
start = start + 29
subject_base = stderr[start:]
subject_base = subject_base.strip()
subject_base = DN(subject_base)
if options.principal is not None:
stderr, stdout, returncode = run(
["kdestroy"], raiseonerr=False, env=env)
# Obtain the TGT. We do it with the temporary krb5.conf, so that
# only the KDC we're installing under is contacted.
# Other KDCs might not have replicated the principal yet.
# Once we have the TGT, it's usable on any server.
env['KRB5CCNAME'] = os.environ['KRB5CCNAME'] = CCACHE_FILE
try:
get_host_tgt(hostname, cli_realm, '/etc/krb5.keytab',
options.kinit_attempts, env)
except CalledProcessError:
print_port_conf_info()
root_logger.error("Failed to obtain host TGT.")
# failure to get ticket makes it impossible to login and bind
# from sssd to LDAP, abort installation and rollback changes
return CLIENT_INSTALL_ERROR
finally:
try:
os.remove(krb_name)
except OSError:
root_logger.error("Could not remove %s", krb_name)
try:
os.remove(ccache_name)
except OSError:
pass
try:
os.remove(krb_name + ".ipabkp")
except OSError:
root_logger.error("Could not remove %s.ipabkp", krb_name)
# Configure ipa.conf
if not options.on_master:
configure_ipa_conf(fstore, cli_basedn, cli_realm, cli_domain, cli_server)
root_logger.info("Created /etc/ipa/default.conf")
api.bootstrap(context='cli_installer', debug=options.debug)
api.finalize()
if 'config_loaded' not in api.env:
root_logger.error("Failed to initialize IPA API.")
return CLIENT_INSTALL_ERROR
# Always back up sssd.conf. It gets updated by authconfig --enablekrb5.
fstore.backup_file("/etc/sssd/sssd.conf")
if options.sssd:
if configure_sssd_conf(fstore, cli_realm, cli_domain, cli_server, options, client_domain, hostname):
return CLIENT_INSTALL_ERROR
root_logger.info("Configured /etc/sssd/sssd.conf")
# Add the CA to the default NSS database and trust it
try:
run(["/usr/bin/certutil", "-A", "-d", "/etc/pki/nssdb", "-n", "IPA CA", "-t", "CT,C,C", "-a", "-i", CACERT])
except CalledProcessError, e:
root_logger.info("Failed to add CA to the default NSS database.")
return CLIENT_INSTALL_ERROR
host_principal = 'host/%s@%s' % (hostname, cli_realm)
if options.on_master:
# If on master assume kerberos is already configured properly.
# Get the host TGT.
os.environ['KRB5CCNAME'] = CCACHE_FILE
try:
run(['/usr/bin/kinit', '-k', '-t', '/etc/krb5.keytab',
host_principal])
except CalledProcessError, e:
root_logger.error("Failed to obtain host TGT.")
return CLIENT_INSTALL_ERROR
else:
# Configure krb5.conf
fstore.backup_file("/etc/krb5.conf")
if configure_krb5_conf(
cli_realm=cli_realm,
cli_domain=cli_domain,
cli_server=cli_server,
cli_kdc=cli_kdc,
dnsok=dnsok,
options=options,
filename="/etc/krb5.conf",
client_domain=client_domain):
return CLIENT_INSTALL_ERROR
root_logger.info(
"Configured /etc/krb5.conf for IPA realm %s", cli_realm)
# Clear out any current session keyring information
try:
delete_persistent_client_session_data(host_principal)
except ValueError:
pass
# Now, let's try to connect to the server's XML-RPC interface
try:
api.Backend.xmlclient.connect()
except errors.KerberosError, e:
root_logger.info('Cannot connect to the server due to ' +
'Kerberos error: %s. Trying with delegate=True', str(e))
try:
api.Backend.xmlclient.connect(delegate=True)
root_logger.info('Connection with delegate=True successful')
# The remote server is not capable of Kerberos S4U2Proxy delegation
# This features is implemented in IPA server version 2.2 and higher
root_logger.warning("Target IPA server has a lower version than " +
"the enrolled client")
root_logger.warning("Some capabilities including the ipa " +
"command capability may not be available")
except errors.PublicError, e2:
root_logger.warning(
'Second connect with delegate=True also failed: %s', str(e2))
root_logger.error(
"Cannot connect to the IPA server XML-RPC interface: %s",
str(e2))
return CLIENT_INSTALL_ERROR
except errors.PublicError, e:
root_logger.error(
'Cannot connect to the server due to generic error: %s', str(e))
return CLIENT_INSTALL_ERROR
remote_env = api.Command['env'](server=True)['result']
if not remote_env['enable_ra']:
disable_ra()
if not options.on_master:
client_dns(cli_server[0], hostname, options.dns_updates)
configure_certmonger(fstore, subject_base, cli_realm, hostname,
options, remote_env)
update_ssh_keys(cli_server[0], hostname, ipaservices.knownservices.sshd.get_config_dir(), options.create_sshfp)
try:
os.remove(CCACHE_FILE)
except Exception:
pass
#Name Server Caching Daemon. Disable for SSSD, use otherwise (if installed)
nscd = ipaservices.knownservices.nscd
if nscd.is_installed():
try:
if options.sssd:
nscd_service_action = 'stop'
nscd.stop()
else:
nscd_service_action = 'restart'
nscd.restart()
except Exception:
root_logger.warning("Failed to %s the %s daemon",
nscd_service_action, nscd.service_name)
if not options.sssd:
root_logger.warning(
"Caching of users/groups will not be available")
try:
if options.sssd:
nscd.disable()
else:
nscd.enable()
except Exception:
if not options.sssd:
root_logger.warning(
"Failed to configure automatic startup of the %s daemon",
nscd.service_name)
root_logger.info("Caching of users/groups will not be " +
"available after reboot")
else:
root_logger.warning(
"Failed to disable %s daemon. Disable it manually.",
nscd.service_name)
else:
# this is optional service, just log
if not options.sssd:
root_logger.info("%s daemon is not installed, skip configuration",
nscd.service_name)
retcode, conf, filename = (0, None, None)
if not options.no_ac:
# Modify nsswitch/pam stack
auth_config = ipaservices.authconfig()
if options.sssd:
statestore.backup_state('authconfig', 'sssd', True)
statestore.backup_state('authconfig', 'sssdauth', True)
auth_config.enable("sssd").\
enable("sssdauth")
message = "SSSD enabled"
conf = 'SSSD'
else:
statestore.backup_state('authconfig', 'ldap', True)
auth_config.enable("ldap").\
enable("forcelegacy")
message = "LDAP enabled"
if options.mkhomedir:
statestore.backup_state('authconfig', 'mkhomedir', True)
auth_config.enable("mkhomedir")
auth_config.add_option("update")
auth_config.execute()
root_logger.info("%s", message)
if not options.no_nisdomain:
# Configure NIS domain before SSSD is started as authconfig could
# stop it otherwise
configure_nisdomain(options=options, domain=cli_domain)
if not options.no_ac:
if options.sssd:
sssd = ipaservices.service('sssd')
try:
sssd.restart()
except CalledProcessError:
root_logger.warning("SSSD service restart was unsuccessful.")
try:
sssd.enable()
except CalledProcessError, e:
root_logger.warning(
"Failed to enable automatic startup of the SSSD daemon: %s", e)
if not options.sssd:
#Modify pam to add pam_krb5 only when sssd is not in use
auth_config.reset()
statestore.backup_state('authconfig', 'krb5', True)
auth_config.enable("krb5").\
add_option("update").\
add_option("nostart")
auth_config.execute()
root_logger.info("Kerberos 5 enabled")
# Update non-SSSD LDAP configuration after authconfig calls as it would
# change its configuration otherways
if not options.sssd:
for configurer in [configure_ldap_conf, configure_nslcd_conf]:
(retcode, conf, filenames) = configurer(fstore, cli_basedn, cli_realm, cli_domain, cli_server, dnsok, options, nosssd_files[configurer.__name__])
if retcode:
return CLIENT_INSTALL_ERROR
if conf:
root_logger.info(
"%s configured using configuration file(s) %s",
conf, filenames)
configure_openldap_conf(fstore, cli_basedn, cli_server)
root_logger.info("Configured /etc/openldap/ldap.conf")
#Check that nss is working properly
if not options.on_master:
n = 0
found = False
# Loop for up to 10 seconds to see if nss is working properly.
# It can sometimes take a few seconds to connect to the remote provider.
# Particulary, SSSD might take longer than 6-8 seconds.
while n < 10 and not found:
try:
ipautil.run(["getent", "passwd", "admin"])
found = True
except Exception, e:
time.sleep(1)
n = n + 1
if not found:
root_logger.error(
"Unable to find 'admin' user with 'getent passwd admin'!")
if conf:
root_logger.info("Recognized configuration: %s", conf)
else:
root_logger.error("Unable to reliably detect " +
"configuration. Check NSS setup manually.")
try:
hardcode_ldap_server(cli_server)
except Exception, e:
root_logger.error("Adding hardcoded server name to " +
"/etc/ldap.conf failed: %s", str(e))
if options.conf_ntp and not options.on_master:
if options.ntp_server:
ntp_server = options.ntp_server
else:
ntp_server = cli_server[0]
ipaclient.ntpconf.config_ntp(ntp_server, fstore, statestore)
root_logger.info("NTP enabled")
if options.conf_ssh:
configure_ssh_config(fstore, options)
if options.conf_sshd:
configure_sshd_config(fstore, options)
root_logger.info('Client configuration complete.')
return 0
def main():
safe_options, options = parse_options()
if not os.getegid() == 0:
sys.exit("\nYou must be root to run ipa-client-install.\n")
if os.path.exists('/proc/sys/crypto/fips_enabled'):
with open('/proc/sys/crypto/fips_enabled', 'r') as f:
if f.read().strip() != '0':
sys.exit("Cannot install IPA client in FIPS mode")
ipaservices.check_selinux_status()
logging_setup(options)
root_logger.debug(
'%s was invoked with options: %s', sys.argv[0], safe_options)
root_logger.debug("missing options might be asked for interactively later")
env={"PATH":"/bin:/sbin:/usr/kerberos/bin:/usr/kerberos/sbin:/usr/bin:/usr/sbin"}
global fstore
fstore = sysrestore.FileStore('/var/lib/ipa-client/sysrestore')
global statestore
statestore = sysrestore.StateFile('/var/lib/ipa-client/sysrestore')
if options.uninstall:
return uninstall(options, env)
if is_ipa_client_installed(on_master=options.on_master):
root_logger.error("IPA client is already configured on this system.")
root_logger.info(
"If you want to reinstall the IPA client, uninstall it first " +
"using 'ipa-client-install --uninstall'.")
return CLIENT_ALREADY_CONFIGURED
rval = install(options, env, fstore, statestore)
if rval == CLIENT_INSTALL_ERROR:
if options.force:
root_logger.warning(
"Installation failed. Force set so not rolling back changes.")
else:
root_logger.error("Installation failed. Rolling back changes.")
options.unattended = True
uninstall(options, env)
return rval
try:
if __name__ == "__main__":
sys.exit(main())
except SystemExit, e:
sys.exit(e)
except KeyboardInterrupt:
sys.exit(1)
except RuntimeError, e:
sys.exit(e)
finally:
try:
os.remove(CCACHE_FILE)
except Exception:
pass