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d769b124b0
freeipa/ipaserver/install/adtrustinstance.py
Tomas Babej d769b124b0 adtrustinstance: Properly handle uninstall of AD trust instance 
The uninstall method of the AD trust instance was not called upon
at all in the ipa-server-install --uninstall phase.

This patch makes sure that AD trust instance is unconfigured when
the server is uninstalled.

The following steps are undertaken:
  * Remove /var/run/samba/krb5cc_samba
  * Remove our keys from /etc/samba/samba.keytab using ipa-rmkeytab
  * Remove /var/lib/samba/*.tdb files

Additionally, we make sure winbind service is stopped from within the
stop() method.

Part of: https://fedorahosted.org/freeipa/ticket/3479
2013-10-14 11:11:17 +02:00

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# Authors: Sumit Bose <sbose@redhat.com>
#
# Copyright (C) 2011 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/>.
#
import os
import errno
import ldap
import tempfile
import uuid
import string
import struct
import re
from ipaserver.install import service
from ipaserver.install import installutils
from ipaserver.install.dsinstance import realm_to_serverid
from ipaserver.install.bindinstance import get_rr, add_rr, del_rr, \
dns_zone_exists
from ipalib import errors, api
from ipalib.util import normalize_zone
from ipapython.dn import DN
from ipapython import sysrestore
from ipapython import ipautil
from ipapython.ipa_log_manager import *
from ipapython import services as ipaservices
import ipaclient.ipachangeconf
ALLOWED_NETBIOS_CHARS = string.ascii_uppercase + string.digits
SELINUX_WARNING = """
WARNING: could not set selinux boolean(s) %(var)s to true. The adtrust
service may not function correctly until this boolean is successfully
change with the command:
/usr/sbin/setsebool -P %(var)s true
Try updating the policycoreutils and selinux-policy packages.
"""
UPGRADE_ERROR = """
Entry %(dn)s does not exist.
This means upgrade from IPA 2.x to 3.x did not went well and required S4U2Proxy
configuration was not set up properly. Please run ipa-ldap-updater manually
and re-run ipa-adtrust-instal again afterwards.
"""
def check_inst():
for smbfile in ['/usr/sbin/smbd', '/usr/bin/net']:
if not os.path.exists(smbfile):
print "%s was not found on this system" % smbfile
print "Please install the 'samba' packages and " \
"start the installation again"
return False
#TODO: Add check for needed samba4 libraries
return True
def ipa_smb_conf_exists():
try:
conf_fd = open('/etc/samba/smb.conf', 'r')
except IOError, err:
if err.errno == errno.ENOENT:
return False
lines = conf_fd.readlines()
conf_fd.close()
for line in lines:
if line.startswith('### Added by IPA Installer ###'):
return True
return False
def check_netbios_name(s):
# NetBIOS names may not be longer than 15 allowed characters
if not s or len(s) > 15 or \
''.join([c for c in s if c not in ALLOWED_NETBIOS_CHARS]):
return False
return True
def make_netbios_name(s):
return ''.join([c for c in s.split('.')[0].upper() \
if c in ALLOWED_NETBIOS_CHARS])[:15]
class ADTRUSTInstance(service.Service):
ATTR_SID = "ipaNTSecurityIdentifier"
ATTR_FLAT_NAME = "ipaNTFlatName"
ATTR_GUID = "ipaNTDomainGUID"
ATTR_FALLBACK_GROUP = "ipaNTFallbackPrimaryGroup"
OBJC_USER = "ipaNTUserAttrs"
OBJC_GROUP = "ipaNTGroupAttrs"
OBJC_DOMAIN = "ipaNTDomainAttrs"
FALLBACK_GROUP_NAME = u'Default SMB Group'
def __init__(self, fstore=None):
self.fqdn = None
self.ip_address = None
self.realm = None
self.domain_name = None
self.netbios_name = None
self.reset_netbios_name = None
self.no_msdcs = None
self.add_sids = None
self.smbd_user = None
self.suffix = DN()
self.ldapi_socket = None
self.smb_conf = None
self.smb_dn = None
self.smb_dn_pwd = None
self.trust_dn = None
self.smb_dom_dn = None
self.sub_dict = None
self.cifs_principal = None
self.cifs_agent = None
self.selinux_booleans = None
self.rid_base = None
self.secondary_rid_base = None
service.Service.__init__(self, "smb", service_desc="CIFS", dm_password=None, ldapi=True)
if fstore:
self.fstore = fstore
else:
self.fstore = sysrestore.FileStore('/var/lib/ipa/sysrestore')
def __gen_sid_string(self):
sub_ids = struct.unpack("<LLL", os.urandom(12))
return "S-1-5-21-%d-%d-%d" % (sub_ids[0], sub_ids[1], sub_ids[2])
def __add_admin_sids(self):
"""
The IPA admin and the IPA admins group with get the well knows SIDs
used by AD for the administrator and the administrator group.
By default new users belong only to a user private group (UPG) and no
other Posix group since ipausers is not a Posix group anymore. To be
able to add a RID to the primary RID attribute in a PAC a fallback
group is added.
"""
admin_dn = DN(('uid', 'admin'), api.env.container_user,
self.suffix)
admin_group_dn = DN(('cn', 'admins'), api.env.container_group,
self.suffix)
try:
dom_entry = self.admin_conn.get_entry(self.smb_dom_dn)
except errors.NotFound:
self.print_msg("Samba domain object not found")
return
dom_sid = dom_entry.single_value(self.ATTR_SID, None)
if not dom_sid:
self.print_msg("Samba domain object does not have a SID")
return
try:
admin_entry = self.admin_conn.get_entry(admin_dn)
except:
self.print_msg("IPA admin object not found")
return
try:
admin_group_entry = self.admin_conn.get_entry(admin_group_dn)
except:
self.print_msg("IPA admin group object not found")
return
if admin_entry.single_value(self.ATTR_SID, None):
self.print_msg("Admin SID already set, nothing to do")
else:
try:
self.admin_conn.modify_s(admin_dn, \
[(ldap.MOD_ADD, "objectclass", self.OBJC_USER), \
(ldap.MOD_ADD, self.ATTR_SID, dom_sid + "-500")])
except:
self.print_msg("Failed to modify IPA admin object")
if admin_group_entry.single_value(self.ATTR_SID, None):
self.print_msg("Admin group SID already set, nothing to do")
else:
try:
self.admin_conn.modify_s(admin_group_dn, \
[(ldap.MOD_ADD, "objectclass", self.OBJC_GROUP), \
(ldap.MOD_ADD, self.ATTR_SID, dom_sid + "-512")])
except:
self.print_msg("Failed to modify IPA admin group object")
def __add_fallback_group(self):
"""
By default new users belong only to a user private group (UPG) and no
other Posix group since ipausers is not a Posix group anymore. To be
able to add a RID to the primary RID attribute in a PAC a fallback
group is added.
Since this method must be run after a restart of the directory server
to enable the sidgen plugin we have to reconnect to the directory
server.
"""
self.ldap_connect()
try:
dom_entry = self.admin_conn.get_entry(self.smb_dom_dn)
except errors.NotFound:
self.print_msg("Samba domain object not found")
return
if dom_entry.single_value(self.ATTR_FALLBACK_GROUP, None):
self.print_msg("Fallback group already set, nothing to do")
return
fb_group_dn = DN(('cn', self.FALLBACK_GROUP_NAME),
api.env.container_group, self.suffix)
try:
self.admin_conn.get_entry(fb_group_dn)
except errors.NotFound:
try:
self._ldap_mod('default-smb-group.ldif', self.sub_dict)
except Exception, e:
self.print_msg("Failed to add fallback group.")
raise e
# _ldap_mod does not return useful error codes, so we must check again
# if the fallback group was created properly.
try:
self.admin_conn.get_entry(fb_group_dn)
except errors.NotFound:
self.print_msg("Failed to add fallback group.")
return
try:
mod = [(ldap.MOD_ADD, self.ATTR_FALLBACK_GROUP, fb_group_dn)]
self.admin_conn.modify_s(self.smb_dom_dn, mod)
except:
self.print_msg("Failed to add fallback group to domain object")
def __add_rid_bases(self):
"""
Add RID bases to the range object for the local ID range.
TODO: handle missing or multiple ranges more gracefully.
"""
try:
# Get the ranges
ranges = self.admin_conn.get_entries(
DN(api.env.container_ranges, self.suffix),
ldap.SCOPE_ONELEVEL, "(objectclass=ipaDomainIDRange)")
# Filter out ranges where RID base is already set
no_rid_base_set = lambda r: not any((
r.single_value('ipaBaseRID', None),
r.single_value('ipaSecondaryBaseRID', None)))
ranges_with_no_rid_base = filter(no_rid_base_set, ranges)
# Return if no range is without RID base
if len(ranges_with_no_rid_base) == 0:
self.print_msg("RID bases already set, nothing to do")
return
# Abort if RID base needs to be added to more than one range
if len(ranges_with_no_rid_base) != 1:
root_logger.critical("Found more than one local domain ID "
"range with no RID base set.")
raise RuntimeError("Too many ID ranges\n")
# Abort if RID bases are too close
local_range = ranges_with_no_rid_base[0]
size = local_range.single_value('ipaIDRangeSize', None)
if abs(self.rid_base - self.secondary_rid_base) > size:
self.print_msg("Primary and secondary RID base are too close. "
"They have to differ at least by %d." % size)
raise RuntimeError("RID bases too close.\n")
# Modify the range
# If the RID bases would cause overlap with some other range,
# this will be detected by ipa-range-check DS plugin
try:
self.admin_conn.modify_s(local_range.dn,
[(ldap.MOD_ADD, "ipaBaseRID",
str(self.rid_base)),
(ldap.MOD_ADD, "ipaSecondaryBaseRID",
str(self.secondary_rid_base))])
except ldap.CONSTRAINT_VIOLATION, e:
self.print_msg("Failed to add RID bases to the local range "
"object:\n %s" % e[0]['info'])
raise RuntimeError("Constraint violation.\n")
except errors.NotFound as e:
root_logger.critical("ID range of the local domain not found, "
"define it and run again.")
raise e
def __reset_netbios_name(self):
"""
Set the NetBIOS domain name to a new value.
"""
self.print_msg("Reset NetBIOS domain name")
try:
self.admin_conn.modify_s(self.smb_dom_dn,
[(ldap.MOD_REPLACE, self.ATTR_FLAT_NAME,
self.netbios_name)])
except ldap.LDAPError:
self.print_msg("Failed to reset the NetBIOS domain name")
def __create_samba_domain_object(self):
try:
self.admin_conn.get_entry(self.smb_dom_dn)
if self.reset_netbios_name:
self.__reset_netbios_name()
else :
self.print_msg("Samba domain object already exists")
return
except errors.NotFound:
pass
for new_dn in (self.trust_dn, \
DN(('cn', 'ad'), self.trust_dn), \
DN(api.env.container_cifsdomains, self.suffix)):
try:
self.admin_conn.get_entry(new_dn)
except errors.NotFound:
try:
name = new_dn[1].attr
except Exception, e:
self.print_msg('Cannot extract RDN attribute value from "%s": %s' % \
(new_dn, e))
return
entry = self.admin_conn.make_entry(
new_dn, objectclass=['nsContainer'], cn=[name])
self.admin_conn.add_entry(entry)
entry = self.admin_conn.make_entry(
self.smb_dom_dn,
{
'objectclass': [self.OBJC_DOMAIN, "nsContainer"],
'cn': [self.domain_name],
self.ATTR_FLAT_NAME: [self.netbios_name],
self.ATTR_SID: [self.__gen_sid_string()],
self.ATTR_GUID: [str(uuid.uuid4())],
}
)
#TODO: which MAY attributes do we want to set ?
self.admin_conn.add_entry(entry)
def __write_smb_conf(self):
conf_fd = open(self.smb_conf, "w")
conf_fd.write('### Added by IPA Installer ###\n')
conf_fd.write('[global]\n')
conf_fd.write('config backend = registry\n')
conf_fd.close()
def __add_plugin_conf(self, name, plugin_cn, ldif_file):
"""
Add directory server plugin configuration if it not already
exists.
"""
try:
plugin_dn = DN(('cn', plugin_cn), ('cn', 'plugins'),
('cn', 'config'))
self.admin_conn.get_entry(plugin_dn)
self.print_msg('%s plugin already configured, nothing to do' % name)
except errors.NotFound:
try:
self._ldap_mod(ldif_file, self.sub_dict)
except Exception:
pass
def __add_cldap_module(self):
"""
Add cldap directory server plugin configuration if it not already
exists.
"""
self.__add_plugin_conf('CLDAP', 'ipa_cldap', 'ipa-cldap-conf.ldif')
def __add_sidgen_module(self):
"""
Add sidgen directory server plugin configuration and the related task
if they not already exist.
"""
self.__add_plugin_conf('Sidgen', 'IPA SIDGEN', 'ipa-sidgen-conf.ldif')
self.__add_plugin_conf('Sidgen task', 'ipa-sidgen-task',
'ipa-sidgen-task-conf.ldif')
def __add_sids(self):
"""
Add SIDs for existing users and groups
"""
try:
self._ldap_mod("ipa-sidgen-task-run.ldif", self.sub_dict)
except:
pass
def __add_extdom_module(self):
"""
Add directory server configuration for the extdom extended operation
if it not already exists.
"""
self.__add_plugin_conf('Extdom', 'ipa_extdom_extop',
'ipa-extdom-extop-conf.ldif')
def __add_s4u2proxy_target(self):
"""
Add CIFS principal to S4U2Proxy target
"""
targets_dn = DN(('cn', 'ipa-cifs-delegation-targets'), ('cn', 's4u2proxy'),
('cn', 'etc'), self.suffix)
try:
current = self.admin_conn.get_entry(targets_dn)
members = current.get('memberPrincipal', [])
if not(self.cifs_principal in members):
current["memberPrincipal"] = members + [self.cifs_principal]
self.admin_conn.update_entry(targets_dn, current)
else:
self.print_msg('cifs principal already targeted, nothing to do.')
except errors.NotFound:
self.print_msg(UPGRADE_ERROR % dict(dn=targets_dn))
def __write_smb_registry(self):
template = os.path.join(ipautil.SHARE_DIR, "smb.conf.template")
conf = ipautil.template_file(template, self.sub_dict)
[tmp_fd, tmp_name] = tempfile.mkstemp()
os.write(tmp_fd, conf)
os.close(tmp_fd)
args = ["/usr/bin/net", "conf", "import", tmp_name]
try:
ipautil.run(args)
finally:
os.remove(tmp_name)
def __setup_principal(self):
try:
api.Command.service_add(unicode(self.cifs_principal))
# Add the principal to the 'adtrust agents' group
# as 389-ds only operates with GroupOfNames, we have to use
# the principal's proper dn as defined in self.cifs_agent
try:
current = self.admin_conn.get_entry(self.smb_dn)
members = current.get('member', [])
if not(self.cifs_agent in members):
current["member"] = members + [self.cifs_agent]
self.admin_conn.update_entry(self.smb_dn, current)
except errors.NotFound:
entry = self.admin_conn.make_entry(
self.smb_dn,
objectclass=["top", "GroupOfNames"],
cn=[self.smb_dn['cn']],
member=[self.cifs_agent],
)
self.admin_conn.add_entry(entry)
except Exception:
# CIFS principal already exists, it is not the first time
# adtrustinstance is managed
# That's fine, we we'll re-extract the key again.
pass
self.clean_samba_keytab()
try:
ipautil.run(["ipa-getkeytab", "--server", self.fqdn,
"--principal", self.cifs_principal,
"-k", self.samba_keytab])
except ipautil.CalledProcessError:
root_logger.critical("Failed to add key for %s"
% self.cifs_principal)
def clean_samba_keytab(self):
if os.path.exists(self.samba_keytab):
try:
ipautil.run(["ipa-rmkeytab", "--principal", self.cifs_principal,
"-k", self.samba_keytab])
except ipautil.CalledProcessError, e:
if e.returncode != 5:
root_logger.critical("Failed to remove old key for %s"
% self.cifs_principal)
def srv_rec(self, host, port, prio):
return "%(prio)d 100 %(port)d %(host)s" % dict(host=host,prio=prio,port=port)
def __add_dns_service_records(self):
"""
Add DNS service records for Windows if DNS is enabled and the DNS zone
is managed. If there are already service records for LDAP and Kerberos
their values are used. Otherwise default values are used.
"""
zone = self.domain_name
host, host_domain = self.fqdn.split(".", 1)
if normalize_zone(zone) == normalize_zone(host_domain):
host_in_rr = host
else:
host_in_rr = normalize_zone(self.fqdn)
priority = 0
ipa_srv_rec = (
("_ldap._tcp", [self.srv_rec(host_in_rr, 389, priority)], 389),
("_kerberos._tcp", [self.srv_rec(host_in_rr, 88, priority)], 88),
("_kerberos._udp", [self.srv_rec(host_in_rr, 88, priority)], 88),
)
win_srv_suffix = (".Default-First-Site-Name._sites.dc._msdcs",
".dc._msdcs")
err_msg = None
if self.no_msdcs:
err_msg = '--no-msdcs was given, special DNS service records ' \
'are not added to local DNS server'
else:
ret = api.Command['dns_is_enabled']()
if not ret['result']:
err_msg = "DNS management was not enabled at install time."
else:
if not dns_zone_exists(zone):
err_msg = "DNS zone %s cannot be managed " \
"as it is not defined in IPA" % zone
if err_msg:
self.print_msg(err_msg)
self.print_msg("Add the following service records to your DNS " \
"server for DNS zone %s: " % zone)
for srv in ipa_srv_rec:
for suff in win_srv_suffix:
self.print_msg(" - %s%s" % (srv[0], suff))
return
for (srv, rdata, port) in ipa_srv_rec:
cifs_rdata = list()
for fqdn in self.cifs_hosts:
cifs_srv = self.srv_rec(fqdn, port, priority)
cifs_rdata.append(cifs_srv)
cifs_rdata.extend(rdata)
for suff in win_srv_suffix:
win_srv = srv+suff
win_rdata = get_rr(zone, win_srv, "SRV")
if win_rdata:
for rec in win_rdata:
del_rr(zone, win_srv, "SRV", rec)
for rec in cifs_rdata:
add_rr(zone, win_srv, "SRV", rec)
def __configure_selinux_for_smbd(self):
selinux = False
try:
if (os.path.exists('/usr/sbin/selinuxenabled')):
ipautil.run(["/usr/sbin/selinuxenabled"])
selinux = True
except ipautil.CalledProcessError:
# selinuxenabled returns 1 if not enabled
pass
if selinux:
# Don't assume all booleans are available
sebools = []
for var in self.selinux_booleans:
try:
(stdout, stderr, returncode) = ipautil.run(["/usr/sbin/getsebool", var])
if stdout and not stderr and returncode == 0:
self.backup_state(var, stdout.split()[2])
sebools.append(var)
except:
pass
if sebools:
bools = [var + "=true" for var in sebools]
args = ["/usr/sbin/setsebool", "-P"]
args.extend(bools);
try:
ipautil.run(args)
except:
self.print_msg(SELINUX_WARNING % dict(var=','.join(sebools)))
def __mod_krb5_conf(self):
"""
Set dns_lookup_kdc to true and master_kdc in /etc/krb5.conf
"""
if not self.fqdn or not self.realm:
self.print_msg("Cannot modify /etc/krb5.conf")
krbconf = ipaclient.ipachangeconf.IPAChangeConf("IPA Installer")
krbconf.setOptionAssignment((" = ", " "))
krbconf.setSectionNameDelimiters(("[", "]"))
krbconf.setSubSectionDelimiters(("{", "}"))
krbconf.setIndent(("", " ", " "))
libopts = [{'name':'dns_lookup_kdc', 'type':'option', 'action':'set',
'value':'true'}]
master_kdc = self.fqdn + ":88"
kropts = [{'name':'master_kdc', 'type':'option', 'action':'set',
'value':master_kdc}]
ropts = [{'name':self.realm, 'type':'subsection', 'action':'set',
'value':kropts}]
opts = [{'name':'libdefaults', 'type':'section', 'action':'set',
'value':libopts},
{'name':'realms', 'type':'section', 'action':'set',
'value':ropts}]
krbconf.changeConf("/etc/krb5.conf", opts)
def __update_krb5_conf(self):
"""
Update /etc/krb5.conf if needed
"""
try:
krb5conf = open("/etc/krb5.conf", 'r')
except IOError, e:
self.print_msg("Cannot open /etc/krb5.conf (%s)\n" % str(e))
return
has_dns_lookup_kdc_true = False
for line in krb5conf:
if re.match("^\s*dns_lookup_kdc\s*=\s*[Tt][Rr][Uu][Ee]\s*$", line):
has_dns_lookup_kdc_true = True
break
krb5conf.close()
if not has_dns_lookup_kdc_true:
self.__mod_krb5_conf()
else:
self.print_msg("'dns_lookup_kdc' already set to 'true', "
"nothing to do.")
def __check_replica(self):
try:
cifs_services = DN(api.env.container_service, self.suffix)
# Search for cifs services which also belong to adtrust agents, these are our DCs
res = self.admin_conn.get_entries(cifs_services,
ldap.SCOPE_ONELEVEL,
"(&(krbprincipalname=cifs/*@%s)(memberof=%s))" % (self.realm, str(self.smb_dn)))
if len(res) > 1:
# there are other CIFS services defined, we are not alone
for entry in res:
managedBy = entry.single_value('managedBy', None)
if managedBy:
fqdn = DN(managedBy)['fqdn']
if fqdn != unicode(self.fqdn):
# this is CIFS service of a different host in our
# REALM, we need to remember it to announce via
# SRV records for _msdcs
self.cifs_hosts.append(fqdn.split(".")[0])
except Exception, e:
root_logger.critical("Checking replicas for cifs principals failed with error '%s'" % e)
def __enable_compat_tree(self):
try:
compat_plugin_dn = DN("cn=Schema Compatibility,cn=plugins,cn=config")
lookup_nsswitch_name = "schema-compat-lookup-nsswitch"
for config in (("cn=users", "user"), ("cn=groups", "group")):
entry_dn = DN(config[0], compat_plugin_dn)
current = self.admin_conn.get_entry(entry_dn)
lookup_nsswitch = current.get(lookup_nsswitch_name, [])
if not(config[1] in lookup_nsswitch):
current[lookup_nsswitch_name] = [config[1]]
self.admin_conn.update_entry(entry_dn, current)
except Exception, e:
root_logger.critical("Enabling nsswitch support in slapi-nis failed with error '%s'" % e)
def __start(self):
try:
self.start()
ipaservices.service('winbind').start()
except:
root_logger.critical("CIFS services failed to start")
def __stop(self):
self.backup_state("running", self.is_running())
try:
ipaservices.service('winbind').stop()
self.stop()
except:
pass
def __restart_dirsrv(self):
try:
ipaservices.knownservices.dirsrv.restart()
except:
pass
def __enable(self):
self.backup_state("enabled", self.is_enabled())
# We do not let the system start IPA components on its own,
# Instead we reply on the IPA init script to start only enabled
# components as found in our LDAP configuration tree
# Note that self.dm_password is None for ADTrustInstance because
# we ensure to be called as root and using ldapi to use autobind
try:
self.ldap_enable('ADTRUST', self.fqdn, self.dm_password, \
self.suffix)
except (ldap.ALREADY_EXISTS, errors.DuplicateEntry), e:
root_logger.info("ADTRUST Service startup entry already exists.")
try:
self.ldap_enable('EXTID', self.fqdn, self.dm_password, \
self.suffix)
except (ldap.ALREADY_EXISTS, errors.DuplicateEntry), e:
root_logger.info("EXTID Service startup entry already exists.")
def __setup_sub_dict(self):
self.sub_dict = dict(REALM = self.realm,
SUFFIX = self.suffix,
NETBIOS_NAME = self.netbios_name,
SMB_DN = self.smb_dn,
LDAPI_SOCKET = self.ldapi_socket,
FQDN = self.fqdn)
def setup(self, fqdn, ip_address, realm_name, domain_name, netbios_name,
reset_netbios_name, rid_base, secondary_rid_base,
no_msdcs=False, add_sids=False, smbd_user="samba", enable_compat=False):
self.fqdn = fqdn
self.ip_address = ip_address
self.realm = realm_name
self.domain_name = domain_name
self.netbios_name = netbios_name
self.reset_netbios_name = reset_netbios_name
self.rid_base = rid_base
self.secondary_rid_base = secondary_rid_base
self.no_msdcs = no_msdcs
self.add_sids = add_sids
self.enable_compat = enable_compat
self.smbd_user = smbd_user
self.suffix = ipautil.realm_to_suffix(self.realm)
self.ldapi_socket = "%%2fvar%%2frun%%2fslapd-%s.socket" % \
realm_to_serverid(self.realm)
self.smb_conf = "/etc/samba/smb.conf"
self.samba_keytab = "/etc/samba/samba.keytab"
self.smb_dn = DN(('cn', 'adtrust agents'), ('cn', 'sysaccounts'),
('cn', 'etc'), self.suffix)
self.trust_dn = DN(api.env.container_trusts, self.suffix)
self.smb_dom_dn = DN(('cn', self.domain_name),
api.env.container_cifsdomains, self.suffix)
self.cifs_principal = "cifs/" + self.fqdn + "@" + self.realm
self.cifs_agent = DN(('krbprincipalname', self.cifs_principal.lower()),
api.env.container_service,
self.suffix)
self.selinux_booleans = ["samba_portmapper"]
self.cifs_hosts = list()
self.__setup_sub_dict()
def find_local_id_range(self):
self.ldap_connect()
if self.admin_conn.get_entries(
DN(api.env.container_ranges, self.suffix),
ldap.SCOPE_ONELEVEL,
"(objectclass=ipaDomainIDRange)"):
return
try:
entry = self.admin_conn.get_entry(
DN(('cn', 'admins'), api.env.container_group, self.suffix))
except errors.NotFound:
raise ValueError("No local ID range and no admins group found.\n" \
"Add local ID range manually and try again!")
base_id = int(entry.single_value('gidNumber'))
id_range_size = 200000
id_filter = "(&" \
"(|(objectclass=posixAccount)" \
"(objectclass=posixGroup)" \
"(objectclass=ipaIDObject))" \
"(|(uidNumber<=%d)(uidNumber>=%d)" \
"(gidNumber<=%d)(gidNumner>=%d)))" % \
((base_id - 1), (base_id + id_range_size),
(base_id - 1), (base_id + id_range_size))
if self.admin_conn.get_entries(DN(('cn', 'accounts'), self.suffix),
ldap.SCOPE_SUBTREE, id_filter):
raise ValueError("There are objects with IDs out of the expected" \
"range.\nAdd local ID range manually and try " \
"again!")
entry = self.admin_conn.make_entry(
DN(
('cn', ('%s_id_range' % self.realm)),
api.env.container_ranges, self.suffix),
objectclass=['ipaDomainIDRange'],
cn=['%s_id_range' % self.realm],
ipaBaseID=[str(base_id)],
ipaIDRangeSize=[str(id_range_size)],
)
self.admin_conn.add_entry(entry)
def create_instance(self):
self.ldap_connect()
self.step("stopping smbd", self.__stop)
self.step("creating samba domain object", \
self.__create_samba_domain_object)
self.step("creating samba config registry", self.__write_smb_registry)
self.step("writing samba config file", self.__write_smb_conf)
self.step("adding cifs Kerberos principal", self.__setup_principal)
self.step("check for cifs services defined on other replicas", self.__check_replica)
self.step("adding cifs principal to S4U2Proxy targets", self.__add_s4u2proxy_target)
self.step("adding admin(group) SIDs", self.__add_admin_sids)
self.step("adding RID bases", self.__add_rid_bases)
self.step("updating Kerberos config", self.__update_krb5_conf)
self.step("activating CLDAP plugin", self.__add_cldap_module)
self.step("activating sidgen plugin and task", self.__add_sidgen_module)
self.step("activating extdom plugin", self.__add_extdom_module)
self.step("configuring smbd to start on boot", self.__enable)
self.step("adding special DNS service records", \
self.__add_dns_service_records)
if self.enable_compat:
self.step("enabling trusted domains support for older clients via Schema Compatibility plugin",
self.__enable_compat_tree)
self.step("restarting Directory Server to take MS PAC and LDAP plugins changes into account", \
self.__restart_dirsrv)
self.step("adding fallback group", self.__add_fallback_group)
self.step("setting SELinux booleans", \
self.__configure_selinux_for_smbd)
self.step("starting CIFS services", self.__start)
if self.add_sids:
self.step("adding SIDs to existing users and groups",
self.__add_sids)
self.start_creation(show_service_name=False)
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")
try:
self.stop()
except:
pass
# Since we do not guarantee restoring back to working samba state,
# we should not restore smb.conf
# Restore the state of affected selinux booleans
for var in self.selinux_booleans:
sebool_state = self.restore_state(var)
if not sebool_state is None:
try:
ipautil.run(["/usr/sbin/setsebool",
"-P", var, sebool_state])
except:
self.print_msg(SELINUX_WARNING % dict(var=var))
# Remove samba's credentials cache
krb5cc_samba = '/var/run/samba/krb5cc_samba'
installutils.remove_file(krb5cc_samba)
# Remove samba's configuration file
installutils.remove_file(self.smb_conf)
# Remove samba's persistent and temporary tdb files
tdb_files = [tdb_file for tdb_file in os.listdir("/var/lib/samba/")
if tdb_file.endswith(".tdb")]
for tdb_file in tdb_files:
installutils.remove_file(tdb_file)
# Remove our keys from samba's keytab
self.clean_samba_keytab()
if not enabled is None and not enabled:
self.disable()
if not running is None and running:
self.start()
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