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samba-mirror/python/samba/provision/__init__.py
Stefan Metzmacher 3ed1ba6fed s4:provision: use better values for operatingSystem[Version] 
Some clients (e.g. an exchange server) check operatingSystemVersion
in order to check if a domain controller is new enough.

So we better use a value matching the dc functional level.

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
2023-07-19 03:31:30 +00:00

2540 lines
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# Unix SMB/CIFS implementation.
# backend code for provisioning a Samba AD server
# Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2007-2012
# Copyright (C) Andrew Bartlett <abartlet@samba.org> 2008-2009
# Copyright (C) Oliver Liebel <oliver@itc.li> 2008-2009
#
# Based on the original in EJS:
# Copyright (C) Andrew Tridgell <tridge@samba.org> 2005
#
# 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/>.
#
"""Functions for setting up a Samba configuration."""
__docformat__ = "restructuredText"
from base64 import b64encode
import errno
import os
import stat
import re
import pwd
import grp
import logging
import time
import uuid
import socket
import tempfile
import samba.dsdb
import ldb
from samba.auth import system_session, admin_session
from samba.auth_util import system_session_unix
import samba
from samba import auth
from samba.samba3 import smbd, passdb
from samba.samba3 import param as s3param
from samba import (
Ldb,
MAX_NETBIOS_NAME_LEN,
check_all_substituted,
is_valid_netbios_char,
setup_file,
substitute_var,
valid_netbios_name,
version,
is_heimdal_built,
)
from samba.dcerpc import security, misc
from samba.dcerpc.misc import (
SEC_CHAN_BDC,
SEC_CHAN_WKSTA,
)
from samba.dsdb import (
DS_DOMAIN_FUNCTION_2000,
DS_DOMAIN_FUNCTION_2003,
DS_DOMAIN_FUNCTION_2008,
DS_DOMAIN_FUNCTION_2008_R2,
DS_DOMAIN_FUNCTION_2012,
DS_DOMAIN_FUNCTION_2012_R2,
DS_DOMAIN_FUNCTION_2016,
ENC_ALL_TYPES,
)
from samba.idmap import IDmapDB
from samba.ms_display_specifiers import read_ms_ldif
from samba.ntacls import setntacl, getntacl, dsacl2fsacl
from samba.ndr import ndr_pack, ndr_unpack
from samba.provision.backend import (
LDBBackend,
)
from samba.descriptor import (
get_empty_descriptor,
get_config_descriptor,
get_config_partitions_descriptor,
get_config_sites_descriptor,
get_config_ntds_quotas_descriptor,
get_config_delete_protected1_descriptor,
get_config_delete_protected1wd_descriptor,
get_config_delete_protected2_descriptor,
get_domain_descriptor,
get_domain_infrastructure_descriptor,
get_domain_builtin_descriptor,
get_domain_computers_descriptor,
get_domain_users_descriptor,
get_domain_controllers_descriptor,
get_domain_delete_protected1_descriptor,
get_domain_delete_protected2_descriptor,
get_dns_partition_descriptor,
get_dns_forest_microsoft_dns_descriptor,
get_dns_domain_microsoft_dns_descriptor,
get_managed_service_accounts_descriptor,
)
from samba.provision.common import (
setup_path,
setup_add_ldif,
setup_modify_ldif,
FILL_FULL,
FILL_SUBDOMAIN,
FILL_NT4SYNC,
FILL_DRS
)
from samba.provision.sambadns import (
get_dnsadmins_sid,
setup_ad_dns,
create_dns_dir_keytab_link,
create_dns_update_list
)
import samba.param
import samba.registry
from samba.schema import Schema
from samba.samdb import SamDB
from samba.dbchecker import dbcheck
from samba.provision.kerberos import create_kdc_conf
from samba.samdb import get_default_backend_store
from samba import functional_level
DEFAULT_POLICY_GUID = "31B2F340-016D-11D2-945F-00C04FB984F9"
DEFAULT_DC_POLICY_GUID = "6AC1786C-016F-11D2-945F-00C04FB984F9"
DEFAULTSITE = "Default-First-Site-Name"
LAST_PROVISION_USN_ATTRIBUTE = "lastProvisionUSN"
DEFAULT_MIN_PWD_LENGTH = 7
class ProvisionPaths(object):
def __init__(self):
self.shareconf = None
self.hklm = None
self.hkcu = None
self.hkcr = None
self.hku = None
self.hkpd = None
self.hkpt = None
self.samdb = None
self.idmapdb = None
self.secrets = None
self.keytab = None
self.dns_keytab = None
self.dns = None
self.winsdb = None
self.private_dir = None
self.binddns_dir = None
self.state_dir = None
class ProvisionNames(object):
def __init__(self):
self.ncs = None
self.rootdn = None
self.domaindn = None
self.configdn = None
self.schemadn = None
self.dnsforestdn = None
self.dnsdomaindn = None
self.ldapmanagerdn = None
self.dnsdomain = None
self.realm = None
self.netbiosname = None
self.domain = None
self.hostname = None
self.sitename = None
self.smbconf = None
self.domainsid = None
self.forestsid = None
self.domainguid = None
self.name_map = {}
def find_provision_key_parameters(samdb, secretsdb, idmapdb, paths, smbconf,
lp):
"""Get key provision parameters (realm, domain, ...) from a given provision
:param samdb: An LDB object connected to the sam.ldb file
:param secretsdb: An LDB object connected to the secrets.ldb file
:param idmapdb: An LDB object connected to the idmap.ldb file
:param paths: A list of path to provision object
:param smbconf: Path to the smb.conf file
:param lp: A LoadParm object
:return: A list of key provision parameters
"""
names = ProvisionNames()
names.adminpass = None
# NT domain, kerberos realm, root dn, domain dn, domain dns name
names.domain = lp.get("workgroup").upper()
names.realm = lp.get("realm")
names.dnsdomain = names.realm.lower()
basedn = samba.dn_from_dns_name(names.dnsdomain)
names.realm = names.realm.upper()
# netbiosname
# Get the netbiosname first (could be obtained from smb.conf in theory)
res = secretsdb.search(expression="(flatname=%s)" %
names.domain, base="CN=Primary Domains",
scope=ldb.SCOPE_SUBTREE, attrs=["sAMAccountName"])
names.netbiosname = str(res[0]["sAMAccountName"]).replace("$", "")
names.smbconf = smbconf
# That's a bit simplistic but it's ok as long as we have only 3
# partitions
current = samdb.search(expression="(objectClass=*)",
base="", scope=ldb.SCOPE_BASE,
attrs=["defaultNamingContext", "schemaNamingContext",
"configurationNamingContext", "rootDomainNamingContext",
"namingContexts"])
names.configdn = str(current[0]["configurationNamingContext"][0])
names.schemadn = str(current[0]["schemaNamingContext"][0])
if not (ldb.Dn(samdb, basedn) == (ldb.Dn(samdb,
current[0]["defaultNamingContext"][0].decode('utf8')))):
raise ProvisioningError(("basedn in %s (%s) and from %s (%s)"
"is not the same ..." % (paths.samdb,
str(current[0]["defaultNamingContext"][0].decode('utf8')),
paths.smbconf, basedn)))
names.domaindn = str(current[0]["defaultNamingContext"][0])
names.rootdn = str(current[0]["rootDomainNamingContext"][0])
names.ncs = current[0]["namingContexts"]
names.dnsforestdn = None
names.dnsdomaindn = None
for i in range(0, len(names.ncs)):
nc = str(names.ncs[i])
dnsforestdn = "DC=ForestDnsZones,%s" % (str(names.rootdn))
if nc == dnsforestdn:
names.dnsforestdn = dnsforestdn
continue
dnsdomaindn = "DC=DomainDnsZones,%s" % (str(names.domaindn))
if nc == dnsdomaindn:
names.dnsdomaindn = dnsdomaindn
continue
# default site name
res3 = samdb.search(expression="(objectClass=site)",
base="CN=Sites," + str(names.configdn), scope=ldb.SCOPE_ONELEVEL, attrs=["cn"])
names.sitename = str(res3[0]["cn"])
# dns hostname and server dn
res4 = samdb.search(expression="(CN=%s)" % names.netbiosname,
base="OU=Domain Controllers,%s" % basedn,
scope=ldb.SCOPE_ONELEVEL, attrs=["dNSHostName"])
if len(res4) == 0:
raise ProvisioningError("Unable to find DC called CN=%s under OU=Domain Controllers,%s" % (names.netbiosname, basedn))
names.hostname = str(res4[0]["dNSHostName"]).replace("." + names.dnsdomain, "")
server_res = samdb.search(expression="serverReference=%s" % res4[0].dn,
attrs=[], base=names.configdn)
names.serverdn = str(server_res[0].dn)
# invocation id/objectguid
res5 = samdb.search(expression="(objectClass=*)",
base="CN=NTDS Settings,%s" % str(names.serverdn),
scope=ldb.SCOPE_BASE,
attrs=["invocationID", "objectGUID"])
names.invocation = str(ndr_unpack(misc.GUID, res5[0]["invocationId"][0]))
names.ntdsguid = str(ndr_unpack(misc.GUID, res5[0]["objectGUID"][0]))
# domain guid/sid
res6 = samdb.search(expression="(objectClass=*)", base=basedn,
scope=ldb.SCOPE_BASE, attrs=["objectGUID",
"objectSid", "msDS-Behavior-Version"])
names.domainguid = str(ndr_unpack(misc.GUID, res6[0]["objectGUID"][0]))
names.domainsid = ndr_unpack(security.dom_sid, res6[0]["objectSid"][0])
names.forestsid = ndr_unpack(security.dom_sid, res6[0]["objectSid"][0])
if res6[0].get("msDS-Behavior-Version") is None or \
int(res6[0]["msDS-Behavior-Version"][0]) < DS_DOMAIN_FUNCTION_2000:
names.domainlevel = DS_DOMAIN_FUNCTION_2000
else:
names.domainlevel = int(res6[0]["msDS-Behavior-Version"][0])
# policy guid
res7 = samdb.search(expression="(name={%s})" % DEFAULT_POLICY_GUID,
base="CN=Policies,CN=System," + basedn,
scope=ldb.SCOPE_ONELEVEL, attrs=["cn", "displayName"])
names.policyid = str(res7[0]["cn"]).replace("{", "").replace("}", "")
# dc policy guid
res8 = samdb.search(expression="(name={%s})" % DEFAULT_DC_POLICY_GUID,
base="CN=Policies,CN=System," + basedn,
scope=ldb.SCOPE_ONELEVEL,
attrs=["cn", "displayName"])
if len(res8) == 1:
names.policyid_dc = str(res8[0]["cn"]).replace("{", "").replace("}", "")
else:
names.policyid_dc = None
res9 = idmapdb.search(expression="(cn=%s-%s)" %
(str(names.domainsid), security.DOMAIN_RID_ADMINISTRATOR),
attrs=["xidNumber", "type"])
if len(res9) != 1:
raise ProvisioningError("Unable to find uid/gid for Domain Admins rid (%s-%s" % (str(names.domainsid), security.DOMAIN_RID_ADMINISTRATOR))
if str(res9[0]["type"][0]) == "ID_TYPE_BOTH":
names.root_gid = int(res9[0]["xidNumber"][0])
else:
names.root_gid = pwd.getpwuid(int(res9[0]["xidNumber"][0])).pw_gid
res10 = samdb.search(expression="(samaccountname=dns)",
scope=ldb.SCOPE_SUBTREE, attrs=["dn"],
controls=["search_options:1:2"])
if (len(res10) > 0):
has_legacy_dns_account = True
else:
has_legacy_dns_account = False
res11 = samdb.search(expression="(samaccountname=dns-%s)" % names.netbiosname,
scope=ldb.SCOPE_SUBTREE, attrs=["dn"],
controls=["search_options:1:2"])
if (len(res11) > 0):
has_dns_account = True
else:
has_dns_account = False
if names.dnsdomaindn is not None:
if has_dns_account:
names.dns_backend = 'BIND9_DLZ'
else:
names.dns_backend = 'SAMBA_INTERNAL'
elif has_dns_account or has_legacy_dns_account:
names.dns_backend = 'BIND9_FLATFILE'
else:
names.dns_backend = 'NONE'
dns_admins_sid = get_dnsadmins_sid(samdb, names.domaindn)
names.name_map['DnsAdmins'] = str(dns_admins_sid)
return names
def update_provision_usn(samdb, low, high, id, replace=False):
"""Update the field provisionUSN in sam.ldb
This field is used to track range of USN modified by provision and
upgradeprovision.
This value is used afterward by next provision to figure out if
the field have been modified since last provision.
:param samdb: An LDB object connect to sam.ldb
:param low: The lowest USN modified by this upgrade
:param high: The highest USN modified by this upgrade
:param id: The invocation id of the samba's dc
:param replace: A boolean indicating if the range should replace any
existing one or appended (default)
"""
tab = []
if not replace:
entry = samdb.search(base="@PROVISION",
scope=ldb.SCOPE_BASE,
attrs=[LAST_PROVISION_USN_ATTRIBUTE, "dn"])
for e in entry[0][LAST_PROVISION_USN_ATTRIBUTE]:
if not re.search(';', str(e)):
e = "%s;%s" % (str(e), id)
tab.append(str(e))
tab.append("%s-%s;%s" % (low, high, id))
delta = ldb.Message()
delta.dn = ldb.Dn(samdb, "@PROVISION")
delta[LAST_PROVISION_USN_ATTRIBUTE] = \
ldb.MessageElement(tab,
ldb.FLAG_MOD_REPLACE,
LAST_PROVISION_USN_ATTRIBUTE)
entry = samdb.search(expression='provisionnerID=*',
base="@PROVISION", scope=ldb.SCOPE_BASE,
attrs=["provisionnerID"])
if len(entry) == 0 or len(entry[0]) == 0:
delta["provisionnerID"] = ldb.MessageElement(id, ldb.FLAG_MOD_ADD, "provisionnerID")
samdb.modify(delta)
def set_provision_usn(samdb, low, high, id):
"""Set the field provisionUSN in sam.ldb
This field is used to track range of USN modified by provision and
upgradeprovision.
This value is used afterward by next provision to figure out if
the field have been modified since last provision.
:param samdb: An LDB object connect to sam.ldb
:param low: The lowest USN modified by this upgrade
:param high: The highest USN modified by this upgrade
:param id: The invocationId of the provision"""
tab = []
tab.append("%s-%s;%s" % (low, high, id))
delta = ldb.Message()
delta.dn = ldb.Dn(samdb, "@PROVISION")
delta[LAST_PROVISION_USN_ATTRIBUTE] = \
ldb.MessageElement(tab,
ldb.FLAG_MOD_ADD,
LAST_PROVISION_USN_ATTRIBUTE)
samdb.add(delta)
def get_max_usn(samdb, basedn):
""" This function return the biggest USN present in the provision
:param samdb: A LDB object pointing to the sam.ldb
:param basedn: A string containing the base DN of the provision
(ie. DC=foo, DC=bar)
:return: The biggest USN in the provision"""
res = samdb.search(expression="objectClass=*", base=basedn,
scope=ldb.SCOPE_SUBTREE, attrs=["uSNChanged"],
controls=["search_options:1:2",
"server_sort:1:1:uSNChanged",
"paged_results:1:1"])
return res[0]["uSNChanged"]
def get_last_provision_usn(sam):
"""Get USNs ranges modified by a provision or an upgradeprovision
:param sam: An LDB object pointing to the sam.ldb
:return: a dictionary which keys are invocation id and values are an array
of integer representing the different ranges
"""
try:
entry = sam.search(expression="%s=*" % LAST_PROVISION_USN_ATTRIBUTE,
base="@PROVISION", scope=ldb.SCOPE_BASE,
attrs=[LAST_PROVISION_USN_ATTRIBUTE, "provisionnerID"])
except ldb.LdbError as e1:
(ecode, emsg) = e1.args
if ecode == ldb.ERR_NO_SUCH_OBJECT:
return None
raise
if len(entry) > 0:
myids = []
range = {}
p = re.compile(r'-')
if entry[0].get("provisionnerID"):
for e in entry[0]["provisionnerID"]:
myids.append(str(e))
for r in entry[0][LAST_PROVISION_USN_ATTRIBUTE]:
tab1 = str(r).split(';')
if len(tab1) == 2:
id = tab1[1]
else:
id = "default"
if (len(myids) > 0 and id not in myids):
continue
tab2 = p.split(tab1[0])
if range.get(id) is None:
range[id] = []
range[id].append(tab2[0])
range[id].append(tab2[1])
return range
else:
return None
class ProvisionResult(object):
"""Result of a provision.
:ivar server_role: The server role
:ivar paths: ProvisionPaths instance
:ivar domaindn: The domain dn, as string
"""
def __init__(self):
self.server_role = None
self.paths = None
self.domaindn = None
self.lp = None
self.samdb = None
self.idmap = None
self.names = None
self.domainsid = None
self.adminpass_generated = None
self.adminpass = None
self.backend_result = None
def report_logger(self, logger):
"""Report this provision result to a logger."""
logger.info(
"Once the above files are installed, your Samba AD server will "
"be ready to use")
if self.adminpass_generated:
logger.info("Admin password: %s", self.adminpass)
logger.info("Server Role: %s", self.server_role)
logger.info("Hostname: %s", self.names.hostname)
logger.info("NetBIOS Domain: %s", self.names.domain)
logger.info("DNS Domain: %s", self.names.dnsdomain)
logger.info("DOMAIN SID: %s", self.domainsid)
if self.backend_result:
self.backend_result.report_logger(logger)
def findnss(nssfn, names):
"""Find a user or group from a list of possibilities.
:param nssfn: NSS Function to try (should raise KeyError if not found)
:param names: Names to check.
:return: Value return by first names list.
"""
for name in names:
try:
return nssfn(name)
except KeyError:
pass
raise KeyError("Unable to find user/group in %r" % names)
def findnss_uid(names):
return findnss(pwd.getpwnam, names)[2]
def findnss_gid(names):
return findnss(grp.getgrnam, names)[2]
def get_root_uid(root, logger):
try:
root_uid = findnss_uid(root)
except KeyError as e:
logger.info(e)
logger.info("Assuming root user has UID zero")
root_uid = 0
return root_uid
def provision_paths_from_lp(lp, dnsdomain):
"""Set the default paths for provisioning.
:param lp: Loadparm context.
:param dnsdomain: DNS Domain name
"""
paths = ProvisionPaths()
paths.private_dir = lp.get("private dir")
paths.binddns_dir = lp.get("binddns dir")
paths.state_dir = lp.get("state directory")
# This is stored without path prefix for the "privateKeytab" attribute in
# "secrets_dns.ldif".
paths.dns_keytab = "dns.keytab"
paths.keytab = "secrets.keytab"
paths.shareconf = os.path.join(paths.private_dir, "share.ldb")
paths.samdb = os.path.join(paths.private_dir, "sam.ldb")
paths.idmapdb = os.path.join(paths.private_dir, "idmap.ldb")
paths.secrets = os.path.join(paths.private_dir, "secrets.ldb")
paths.privilege = os.path.join(paths.private_dir, "privilege.ldb")
paths.dns_update_list = os.path.join(paths.private_dir, "dns_update_list")
paths.spn_update_list = os.path.join(paths.private_dir, "spn_update_list")
paths.krb5conf = os.path.join(paths.private_dir, "krb5.conf")
paths.kdcconf = os.path.join(paths.private_dir, "kdc.conf")
paths.winsdb = os.path.join(paths.private_dir, "wins.ldb")
paths.s4_ldapi_path = os.path.join(paths.private_dir, "ldapi")
paths.encrypted_secrets_key_path = os.path.join(
paths.private_dir,
"encrypted_secrets.key")
paths.dns = os.path.join(paths.binddns_dir, "dns", dnsdomain + ".zone")
paths.namedconf = os.path.join(paths.binddns_dir, "named.conf")
paths.namedconf_update = os.path.join(paths.binddns_dir, "named.conf.update")
paths.namedtxt = os.path.join(paths.binddns_dir, "named.txt")
paths.hklm = "hklm.ldb"
paths.hkcr = "hkcr.ldb"
paths.hkcu = "hkcu.ldb"
paths.hku = "hku.ldb"
paths.hkpd = "hkpd.ldb"
paths.hkpt = "hkpt.ldb"
paths.sysvol = lp.get("path", "sysvol")
paths.netlogon = lp.get("path", "netlogon")
paths.smbconf = lp.configfile
return paths
def determine_netbios_name(hostname):
"""Determine a netbios name from a hostname."""
# remove forbidden chars and force the length to be <16
netbiosname = "".join([x for x in hostname if is_valid_netbios_char(x)])
return netbiosname[:MAX_NETBIOS_NAME_LEN].upper()
def guess_names(lp=None, hostname=None, domain=None, dnsdomain=None,
serverrole=None, rootdn=None, domaindn=None, configdn=None,
schemadn=None, serverdn=None, sitename=None,
domain_names_forced=False):
"""Guess configuration settings to use."""
if hostname is None:
hostname = socket.gethostname().split(".")[0]
netbiosname = lp.get("netbios name")
if netbiosname is None:
netbiosname = determine_netbios_name(hostname)
netbiosname = netbiosname.upper()
if not valid_netbios_name(netbiosname):
raise InvalidNetbiosName(netbiosname)
if dnsdomain is None:
dnsdomain = lp.get("realm")
if dnsdomain is None or dnsdomain == "":
raise ProvisioningError(
"guess_names: 'realm' not specified in supplied %s!" %
lp.configfile)
dnsdomain = dnsdomain.lower()
if serverrole is None:
serverrole = lp.get("server role")
if serverrole is None:
raise ProvisioningError("guess_names: 'server role' not specified in supplied %s!" % lp.configfile)
serverrole = serverrole.lower()
realm = dnsdomain.upper()
if lp.get("realm") == "":
raise ProvisioningError("guess_names: 'realm =' was not specified in supplied %s. Please remove the smb.conf file and let provision generate it" % lp.configfile)
if lp.get("realm").upper() != realm:
raise ProvisioningError("guess_names: 'realm=%s' in %s must match chosen realm '%s'! Please remove the smb.conf file and let provision generate it" % (lp.get("realm").upper(), lp.configfile, realm))
if lp.get("server role").lower() != serverrole:
raise ProvisioningError("guess_names: 'server role=%s' in %s must match chosen server role '%s'! Please remove the smb.conf file and let provision generate it" % (lp.get("server role"), lp.configfile, serverrole))
if serverrole == "active directory domain controller":
if domain is None:
# This will, for better or worse, default to 'WORKGROUP'
domain = lp.get("workgroup")
domain = domain.upper()
if lp.get("workgroup").upper() != domain:
raise ProvisioningError("guess_names: Workgroup '%s' in smb.conf must match chosen domain '%s'! Please remove the %s file and let provision generate it" % (lp.get("workgroup").upper(), domain, lp.configfile))
if domaindn is None:
domaindn = samba.dn_from_dns_name(dnsdomain)
if domain == netbiosname:
raise ProvisioningError("guess_names: Domain '%s' must not be equal to short host name '%s'!" % (domain, netbiosname))
else:
domain = netbiosname
if domaindn is None:
domaindn = "DC=" + netbiosname
if not valid_netbios_name(domain):
raise InvalidNetbiosName(domain)
if hostname.upper() == realm:
raise ProvisioningError("guess_names: Realm '%s' must not be equal to hostname '%s'!" % (realm, hostname))
if netbiosname.upper() == realm:
raise ProvisioningError("guess_names: Realm '%s' must not be equal to NetBIOS hostname '%s'!" % (realm, netbiosname))
if domain == realm and not domain_names_forced:
raise ProvisioningError("guess_names: Realm '%s' must not be equal to short domain name '%s'!" % (realm, domain))
if serverrole != "active directory domain controller":
#
# This is the code path for a domain member
# where we provision the database as if we where
# on a domain controller, so we should not use
# the same dnsdomain as the domain controllers
# of our primary domain.
#
# This will be important if we start doing
# SID/name filtering and reject the local
# sid and names if they come from a domain
# controller.
#
realm = netbiosname
dnsdomain = netbiosname.lower()
if rootdn is None:
rootdn = domaindn
if configdn is None:
configdn = "CN=Configuration," + rootdn
if schemadn is None:
schemadn = "CN=Schema," + configdn
if sitename is None:
sitename = DEFAULTSITE
names = ProvisionNames()
names.rootdn = rootdn
names.domaindn = domaindn
names.configdn = configdn
names.schemadn = schemadn
names.ldapmanagerdn = "CN=Manager," + rootdn
names.dnsdomain = dnsdomain
names.domain = domain
names.realm = realm
names.netbiosname = netbiosname
names.hostname = hostname
names.sitename = sitename
names.serverdn = "CN=%s,CN=Servers,CN=%s,CN=Sites,%s" % (
netbiosname, sitename, configdn)
return names
def make_smbconf(smbconf, hostname, domain, realm, targetdir,
serverrole=None, eadb=False, use_ntvfs=False, lp=None,
global_param=None):
"""Create a new smb.conf file based on a couple of basic settings.
"""
assert smbconf is not None
if hostname is None:
hostname = socket.gethostname().split(".")[0]
netbiosname = determine_netbios_name(hostname)
if serverrole is None:
serverrole = "standalone server"
assert domain is not None
domain = domain.upper()
assert realm is not None
realm = realm.upper()
global_settings = {
"netbios name": netbiosname,
"workgroup": domain,
"realm": realm,
"server role": serverrole,
}
if lp is None:
lp = samba.param.LoadParm()
# Load non-existent file
if os.path.exists(smbconf):
lp.load(smbconf)
if global_param is not None:
for ent in global_param:
if global_param[ent] is not None:
global_settings[ent] = " ".join(global_param[ent])
if targetdir is not None:
global_settings["private dir"] = os.path.abspath(os.path.join(targetdir, "private"))
global_settings["lock dir"] = os.path.abspath(targetdir)
global_settings["state directory"] = os.path.abspath(os.path.join(targetdir, "state"))
global_settings["cache directory"] = os.path.abspath(os.path.join(targetdir, "cache"))
global_settings["binddns dir"] = os.path.abspath(os.path.join(targetdir, "bind-dns"))
lp.set("lock dir", os.path.abspath(targetdir))
lp.set("state directory", global_settings["state directory"])
lp.set("cache directory", global_settings["cache directory"])
lp.set("binddns dir", global_settings["binddns dir"])
if eadb:
if use_ntvfs:
if targetdir is not None:
privdir = os.path.join(targetdir, "private")
lp.set("posix:eadb",
os.path.abspath(os.path.join(privdir, "eadb.tdb")))
elif not lp.get("posix:eadb"):
privdir = lp.get("private dir")
lp.set("posix:eadb",
os.path.abspath(os.path.join(privdir, "eadb.tdb")))
else:
if targetdir is not None:
statedir = os.path.join(targetdir, "state")
lp.set("xattr_tdb:file",
os.path.abspath(os.path.join(statedir, "xattr.tdb")))
elif not lp.get("xattr_tdb:file"):
statedir = lp.get("state directory")
lp.set("xattr_tdb:file",
os.path.abspath(os.path.join(statedir, "xattr.tdb")))
shares = {}
if serverrole == "active directory domain controller":
shares["sysvol"] = os.path.join(lp.get("state directory"), "sysvol")
shares["netlogon"] = os.path.join(shares["sysvol"], realm.lower(),
"scripts")
else:
global_settings["passdb backend"] = "samba_dsdb"
f = open(smbconf, 'w')
try:
f.write("[globals]\n")
for key, val in global_settings.items():
f.write("\t%s = %s\n" % (key, val))
f.write("\n")
for name, path in shares.items():
f.write("[%s]\n" % name)
f.write("\tpath = %s\n" % path)
f.write("\tread only = no\n")
f.write("\n")
finally:
f.close()
# reload the smb.conf
lp.load(smbconf)
# and dump it without any values that are the default
# this ensures that any smb.conf parameters that were set
# on the provision/join command line are set in the resulting smb.conf
lp.dump(False, smbconf)
def setup_name_mappings(idmap, sid, root_uid, nobody_uid,
users_gid, root_gid):
"""setup reasonable name mappings for sam names to unix names.
:param samdb: SamDB object.
:param idmap: IDmap db object.
:param sid: The domain sid.
:param domaindn: The domain DN.
:param root_uid: uid of the UNIX root user.
:param nobody_uid: uid of the UNIX nobody user.
:param users_gid: gid of the UNIX users group.
:param root_gid: gid of the UNIX root group.
"""
idmap.setup_name_mapping("S-1-5-7", idmap.TYPE_UID, nobody_uid)
idmap.setup_name_mapping(sid + "-500", idmap.TYPE_UID, root_uid)
idmap.setup_name_mapping(sid + "-513", idmap.TYPE_GID, users_gid)
def setup_samdb_partitions(samdb_path, logger, lp, session_info,
provision_backend, names, serverrole,
erase=False, plaintext_secrets=False,
backend_store=None,backend_store_size=None):
"""Setup the partitions for the SAM database.
Alternatively, provision() may call this, and then populate the database.
:note: This will wipe the Sam Database!
:note: This function always removes the local SAM LDB file. The erase
parameter controls whether to erase the existing data, which
may not be stored locally but in LDAP.
"""
assert session_info is not None
# We use options=["modules:"] to stop the modules loading - we
# just want to wipe and re-initialise the database, not start it up
try:
os.unlink(samdb_path)
except OSError:
pass
samdb = Ldb(url=samdb_path, session_info=session_info,
lp=lp, options=["modules:"])
ldap_backend_line = "# No LDAP backend"
if provision_backend.type != "ldb":
ldap_backend_line = "ldapBackend: %s" % provision_backend.ldap_uri
required_features = None
if not plaintext_secrets:
required_features = "requiredFeatures: encryptedSecrets"
if backend_store is None:
backend_store = get_default_backend_store()
backend_store_line = "backendStore: %s" % backend_store
if backend_store == "mdb":
if required_features is not None:
required_features += "\n"
else:
required_features = ""
required_features += "requiredFeatures: lmdbLevelOne"
if required_features is None:
required_features = "# No required features"
samdb.transaction_start()
try:
logger.info("Setting up sam.ldb partitions and settings")
setup_add_ldif(samdb, setup_path("provision_partitions.ldif"), {
"LDAP_BACKEND_LINE": ldap_backend_line,
"BACKEND_STORE": backend_store_line
})
setup_add_ldif(samdb, setup_path("provision_init.ldif"), {
"BACKEND_TYPE": provision_backend.type,
"SERVER_ROLE": serverrole,
"REQUIRED_FEATURES": required_features
})
logger.info("Setting up sam.ldb rootDSE")
setup_samdb_rootdse(samdb, names)
except:
samdb.transaction_cancel()
raise
else:
samdb.transaction_commit()
def secretsdb_self_join(secretsdb, domain,
netbiosname, machinepass, domainsid=None,
realm=None, dnsdomain=None,
keytab_path=None,
key_version_number=1,
secure_channel_type=SEC_CHAN_WKSTA):
"""Add domain join-specific bits to a secrets database.
:param secretsdb: Ldb Handle to the secrets database
:param machinepass: Machine password
"""
attrs = ["whenChanged",
"secret",
"priorSecret",
"priorChanged",
"krb5Keytab",
"privateKeytab"]
if realm is not None:
if dnsdomain is None:
dnsdomain = realm.lower()
dnsname = '%s.%s' % (netbiosname.lower(), dnsdomain.lower())
else:
dnsname = None
shortname = netbiosname.lower()
# We don't need to set msg["flatname"] here, because rdn_name will handle
# it, and it causes problems for modifies anyway
msg = ldb.Message(ldb.Dn(secretsdb, "flatname=%s,cn=Primary Domains" % domain))
msg["secureChannelType"] = [str(secure_channel_type)]
msg["objectClass"] = ["top", "primaryDomain"]
if dnsname is not None:
msg["objectClass"] = ["top", "primaryDomain", "kerberosSecret"]
msg["realm"] = [realm]
msg["saltPrincipal"] = ["host/%s@%s" % (dnsname, realm.upper())]
msg["msDS-KeyVersionNumber"] = [str(key_version_number)]
msg["privateKeytab"] = ["secrets.keytab"]
msg["secret"] = [machinepass.encode('utf-8')]
msg["samAccountName"] = ["%s$" % netbiosname]
msg["secureChannelType"] = [str(secure_channel_type)]
if domainsid is not None:
msg["objectSid"] = [ndr_pack(domainsid)]
# This complex expression tries to ensure that we don't have more
# than one record for this SID, realm or netbios domain at a time,
# but we don't delete the old record that we are about to modify,
# because that would delete the keytab and previous password.
res = secretsdb.search(base="cn=Primary Domains", attrs=attrs,
expression=("(&(|(flatname=%s)(realm=%s)(objectSid=%s))(objectclass=primaryDomain)(!(distinguishedName=%s)))" % (domain, realm, str(domainsid), str(msg.dn))),
scope=ldb.SCOPE_ONELEVEL)
for del_msg in res:
secretsdb.delete(del_msg.dn)
res = secretsdb.search(base=msg.dn, attrs=attrs, scope=ldb.SCOPE_BASE)
if len(res) == 1:
msg["priorSecret"] = [res[0]["secret"][0]]
try:
msg["priorWhenChanged"] = [res[0]["whenChanged"][0]]
except KeyError:
pass
try:
msg["privateKeytab"] = [res[0]["privateKeytab"][0]]
except KeyError:
pass
try:
msg["krb5Keytab"] = [res[0]["krb5Keytab"][0]]
except KeyError:
pass
for el in msg:
if el != 'dn':
msg[el].set_flags(ldb.FLAG_MOD_REPLACE)
secretsdb.modify(msg)
secretsdb.rename(res[0].dn, msg.dn)
else:
spn = ['HOST/%s' % shortname]
if secure_channel_type == SEC_CHAN_BDC and dnsname is not None:
# we are a domain controller then we add servicePrincipalName
# entries for the keytab code to update.
spn.extend(['HOST/%s' % dnsname])
msg["servicePrincipalName"] = spn
secretsdb.add(msg)
def setup_secretsdb(paths, session_info, lp):
"""Setup the secrets database.
:note: This function does not handle exceptions and transaction on purpose,
it's up to the caller to do this job.
:param path: Path to the secrets database.
:param session_info: Session info.
:param credentials: Credentials
:param lp: Loadparm context
:return: LDB handle for the created secrets database
"""
if os.path.exists(paths.secrets):
os.unlink(paths.secrets)
keytab_path = os.path.join(paths.private_dir, paths.keytab)
if os.path.exists(keytab_path):
os.unlink(keytab_path)
bind_dns_keytab_path = os.path.join(paths.binddns_dir, paths.dns_keytab)
if os.path.exists(bind_dns_keytab_path):
os.unlink(bind_dns_keytab_path)
dns_keytab_path = os.path.join(paths.private_dir, paths.dns_keytab)
if os.path.exists(dns_keytab_path):
os.unlink(dns_keytab_path)
path = paths.secrets
secrets_ldb = Ldb(path, session_info=session_info, lp=lp)
secrets_ldb.erase()
secrets_ldb.load_ldif_file_add(setup_path("secrets_init.ldif"))
secrets_ldb = Ldb(path, session_info=session_info, lp=lp)
secrets_ldb.transaction_start()
try:
secrets_ldb.load_ldif_file_add(setup_path("secrets.ldif"))
except:
secrets_ldb.transaction_cancel()
raise
return secrets_ldb
def setup_privileges(path, session_info, lp):
"""Setup the privileges database.
:param path: Path to the privileges database.
:param session_info: Session info.
:param credentials: Credentials
:param lp: Loadparm context
:return: LDB handle for the created secrets database
"""
if os.path.exists(path):
os.unlink(path)
privilege_ldb = Ldb(path, session_info=session_info, lp=lp)
privilege_ldb.erase()
privilege_ldb.load_ldif_file_add(setup_path("provision_privilege.ldif"))
def setup_encrypted_secrets_key(path):
"""Setup the encrypted secrets key file.
Any existing key file will be deleted and a new random key generated.
:param path: Path to the secrets key file.
"""
if os.path.exists(path):
os.unlink(path)
flags = os.O_WRONLY | os.O_CREAT | os.O_EXCL
mode = stat.S_IRUSR | stat.S_IWUSR
umask_original = os.umask(0)
try:
fd = os.open(path, flags, mode)
finally:
os.umask(umask_original)
with os.fdopen(fd, 'wb') as f:
key = samba.generate_random_bytes(16)
f.write(key)
def setup_registry(path, session_info, lp):
"""Setup the registry.
:param path: Path to the registry database
:param session_info: Session information
:param credentials: Credentials
:param lp: Loadparm context
"""
reg = samba.registry.Registry()
hive = samba.registry.open_ldb(path, session_info=session_info, lp_ctx=lp)
reg.mount_hive(hive, samba.registry.HKEY_LOCAL_MACHINE)
provision_reg = setup_path("provision.reg")
assert os.path.exists(provision_reg)
reg.diff_apply(provision_reg)
def setup_idmapdb(path, session_info, lp):
"""Setup the idmap database.
:param path: path to the idmap database
:param session_info: Session information
:param credentials: Credentials
:param lp: Loadparm context
"""
if os.path.exists(path):
os.unlink(path)
idmap_ldb = IDmapDB(path, session_info=session_info, lp=lp)
idmap_ldb.erase()
idmap_ldb.load_ldif_file_add(setup_path("idmap_init.ldif"))
return idmap_ldb
def setup_samdb_rootdse(samdb, names):
"""Setup the SamDB rootdse.
:param samdb: Sam Database handle
"""
setup_add_ldif(samdb, setup_path("provision_rootdse_add.ldif"), {
"SCHEMADN": names.schemadn,
"DOMAINDN": names.domaindn,
"ROOTDN": names.rootdn,
"CONFIGDN": names.configdn,
"SERVERDN": names.serverdn,
})
def setup_self_join(samdb, admin_session_info, names, fill, machinepass,
dns_backend, dnspass, domainsid, next_rid, invocationid,
policyguid, policyguid_dc,
domainControllerFunctionality, ntdsguid=None, dc_rid=None):
"""Join a host to its own domain."""
assert isinstance(invocationid, str)
if ntdsguid is not None:
ntdsguid_line = "objectGUID: %s\n" % ntdsguid
else:
ntdsguid_line = ""
if dc_rid is None:
dc_rid = next_rid
# Some clients/applications (like exchange) make use of
# the operatingSystemVersion attribute in order to
# find if a DC is good enough.
#
# So we better use a value matching a Windows DC
# with the same domainControllerFunctionality level
operatingSystemVersion = samba.dsdb.dc_operatingSystemVersion(domainControllerFunctionality)
setup_add_ldif(samdb, setup_path("provision_self_join.ldif"), {
"CONFIGDN": names.configdn,
"SCHEMADN": names.schemadn,
"DOMAINDN": names.domaindn,
"SERVERDN": names.serverdn,
"INVOCATIONID": invocationid,
"NETBIOSNAME": names.netbiosname,
"DNSNAME": "%s.%s" % (names.hostname, names.dnsdomain),
"MACHINEPASS_B64": b64encode(machinepass.encode('utf-16-le')).decode('utf8'),
"DOMAINSID": str(domainsid),
"DCRID": str(dc_rid),
"OPERATING_SYSTEM": "Samba-%s" % version,
"OPERATING_SYSTEM_VERSION": operatingSystemVersion,
"NTDSGUID": ntdsguid_line,
"DOMAIN_CONTROLLER_FUNCTIONALITY": str(
domainControllerFunctionality),
"RIDALLOCATIONSTART": str(next_rid + 100),
"RIDALLOCATIONEND": str(next_rid + 100 + 499)})
setup_add_ldif(samdb, setup_path("provision_group_policy.ldif"), {
"POLICYGUID": policyguid,
"POLICYGUID_DC": policyguid_dc,
"DNSDOMAIN": names.dnsdomain,
"DOMAINDN": names.domaindn})
# If we are setting up a subdomain, then this has been replicated in, so we
# don't need to add it
if fill == FILL_FULL:
setup_add_ldif(samdb, setup_path("provision_self_join_config.ldif"), {
"CONFIGDN": names.configdn,
"SCHEMADN": names.schemadn,
"DOMAINDN": names.domaindn,
"SERVERDN": names.serverdn,
"INVOCATIONID": invocationid,
"NETBIOSNAME": names.netbiosname,
"DNSNAME": "%s.%s" % (names.hostname, names.dnsdomain),
"MACHINEPASS_B64": b64encode(machinepass.encode('utf-16-le')).decode('utf8'),
"DOMAINSID": str(domainsid),
"DCRID": str(dc_rid),
"SAMBA_VERSION_STRING": version,
"NTDSGUID": ntdsguid_line,
"DOMAIN_CONTROLLER_FUNCTIONALITY": str(
domainControllerFunctionality)})
# Setup fSMORoleOwner entries to point at the newly created DC entry
setup_modify_ldif(samdb,
setup_path("provision_self_join_modify_schema.ldif"), {
"SCHEMADN": names.schemadn,
"SERVERDN": names.serverdn,
},
controls=["provision:0", "relax:0"])
setup_modify_ldif(samdb,
setup_path("provision_self_join_modify_config.ldif"), {
"CONFIGDN": names.configdn,
"DEFAULTSITE": names.sitename,
"NETBIOSNAME": names.netbiosname,
"SERVERDN": names.serverdn,
})
system_session_info = system_session()
samdb.set_session_info(system_session_info)
# Setup fSMORoleOwner entries to point at the newly created DC entry to
# modify a serverReference under cn=config when we are a subdomain, we must
# be system due to ACLs
setup_modify_ldif(samdb, setup_path("provision_self_join_modify.ldif"), {
"DOMAINDN": names.domaindn,
"SERVERDN": names.serverdn,
"NETBIOSNAME": names.netbiosname,
})
samdb.set_session_info(admin_session_info)
if dns_backend != "SAMBA_INTERNAL":
# This is Samba4 specific and should be replaced by the correct
# DNS AD-style setup
setup_add_ldif(samdb, setup_path("provision_dns_add_samba.ldif"), {
"DNSDOMAIN": names.dnsdomain,
"DOMAINDN": names.domaindn,
"DNSPASS_B64": b64encode(dnspass.encode('utf-16-le')).decode('utf8'),
"HOSTNAME": names.hostname,
"DNSNAME": '%s.%s' % (
names.netbiosname.lower(), names.dnsdomain.lower())
})
def getpolicypath(sysvolpath, dnsdomain, guid):
"""Return the physical path of policy given its guid.
:param sysvolpath: Path to the sysvol folder
:param dnsdomain: DNS name of the AD domain
:param guid: The GUID of the policy
:return: A string with the complete path to the policy folder
"""
if guid[0] != "{":
guid = "{%s}" % guid
policy_path = os.path.join(sysvolpath, dnsdomain, "Policies", guid)
return policy_path
def create_gpo_struct(policy_path):
if not os.path.exists(policy_path):
os.makedirs(policy_path, 0o775)
f = open(os.path.join(policy_path, "GPT.INI"), 'w')
try:
f.write("[General]\r\nVersion=0")
finally:
f.close()
p = os.path.join(policy_path, "MACHINE")
if not os.path.exists(p):
os.makedirs(p, 0o775)
p = os.path.join(policy_path, "USER")
if not os.path.exists(p):
os.makedirs(p, 0o775)
def create_default_gpo(sysvolpath, dnsdomain, policyguid, policyguid_dc):
"""Create the default GPO for a domain
:param sysvolpath: Physical path for the sysvol folder
:param dnsdomain: DNS domain name of the AD domain
:param policyguid: GUID of the default domain policy
:param policyguid_dc: GUID of the default domain controller policy
"""
policy_path = getpolicypath(sysvolpath, dnsdomain, policyguid)
create_gpo_struct(policy_path)
policy_path = getpolicypath(sysvolpath, dnsdomain, policyguid_dc)
create_gpo_struct(policy_path)
# Default the database size to 8Gb
DEFAULT_BACKEND_SIZE = 8 * 1024 * 1024 *1024
def setup_samdb(path, session_info, provision_backend, lp, names,
logger, fill, serverrole, schema, am_rodc=False,
plaintext_secrets=False, backend_store=None,
backend_store_size=None, batch_mode=False):
"""Setup a complete SAM Database.
:note: This will wipe the main SAM database file!
"""
# Also wipes the database
setup_samdb_partitions(path, logger=logger, lp=lp,
provision_backend=provision_backend, session_info=session_info,
names=names, serverrole=serverrole, plaintext_secrets=plaintext_secrets,
backend_store=backend_store,
backend_store_size=backend_store_size)
store_size = DEFAULT_BACKEND_SIZE
if backend_store_size:
store_size = backend_store_size
options = []
if backend_store == "mdb":
options.append("lmdb_env_size:" + str(store_size))
if batch_mode:
options.append("batch_mode:1")
if batch_mode:
# Estimate the number of index records in the transaction_index_cache
# Numbers chosen give the prime 202481 for the default backend size,
# which works well for a 100,000 user database
cache_size = int(store_size / 42423) + 1
options.append("transaction_index_cache_size:" + str(cache_size))
# Load the database, but don's load the global schema and don't connect
# quite yet
samdb = SamDB(session_info=session_info, url=None, auto_connect=False,
lp=lp,
global_schema=False, am_rodc=am_rodc, options=options)
logger.info("Pre-loading the Samba 4 and AD schema")
# Load the schema from the one we computed earlier
samdb.set_schema(schema, write_indices_and_attributes=False)
# Set the NTDS settings DN manually - in order to have it already around
# before the provisioned tree exists and we connect
samdb.set_ntds_settings_dn("CN=NTDS Settings,%s" % names.serverdn)
# And now we can connect to the DB - the schema won't be loaded from the
# DB
try:
samdb.connect(path, options=options)
except ldb.LdbError as e2:
(num, string_error) = e2.args
if (num == ldb.ERR_INSUFFICIENT_ACCESS_RIGHTS):
raise ProvisioningError("Permission denied connecting to %s, are you running as root?" % path)
else:
raise
# But we have to give it one more kick to have it use the schema
# during provision - it needs, now that it is connected, to write
# the schema @ATTRIBUTES and @INDEXLIST records to the database.
samdb.set_schema(schema, write_indices_and_attributes=True)
return samdb
def fill_samdb(samdb, lp, names, logger, policyguid,
policyguid_dc, fill, adminpass, krbtgtpass, machinepass, dns_backend,
dnspass, invocationid, ntdsguid, serverrole, am_rodc=False,
dom_for_fun_level=None, schema=None, next_rid=None, dc_rid=None,
backend_store=None,
backend_store_size=None):
if next_rid is None:
next_rid = 1000
# Provision does not make much sense values larger than 1000000000
# as the upper range of the rIDAvailablePool is 1073741823 and
# we don't want to create a domain that cannot allocate rids.
if next_rid < 1000 or next_rid > 1000000000:
error = "You want to run SAMBA 4 with a next_rid of %u, " % (next_rid)
error += "the valid range is %u-%u. The default is %u." % (
1000, 1000000000, 1000)
raise ProvisioningError(error)
domainControllerFunctionality = functional_level.dc_level_from_lp(lp)
# ATTENTION: Do NOT change these default values without discussion with the
# team and/or release manager. They have a big impact on the whole program!
if dom_for_fun_level is None:
dom_for_fun_level = DS_DOMAIN_FUNCTION_2008_R2
if dom_for_fun_level > domainControllerFunctionality:
level = functional_level.level_to_string(domainControllerFunctionality)
raise ProvisioningError(f"You want to run SAMBA 4 on a domain and forest function level which itself is higher than its actual DC function level ({level}). This won't work!")
domainFunctionality = dom_for_fun_level
forestFunctionality = dom_for_fun_level
# Set the NTDS settings DN manually - in order to have it already around
# before the provisioned tree exists and we connect
samdb.set_ntds_settings_dn("CN=NTDS Settings,%s" % names.serverdn)
# Set the domain functionality levels onto the database.
# Various module (the password_hash module in particular) need
# to know what level of AD we are emulating.
# These will be fixed into the database via the database
# modifictions below, but we need them set from the start.
samdb.set_opaque_integer("domainFunctionality", domainFunctionality)
samdb.set_opaque_integer("forestFunctionality", forestFunctionality)
samdb.set_opaque_integer("domainControllerFunctionality",
domainControllerFunctionality)
samdb.set_domain_sid(str(names.domainsid))
samdb.set_invocation_id(invocationid)
logger.info("Adding DomainDN: %s" % names.domaindn)
# impersonate domain admin
admin_session_info = admin_session(lp, str(names.domainsid))
samdb.set_session_info(admin_session_info)
if names.domainguid is not None:
domainguid_line = "objectGUID: %s\n-" % names.domainguid
else:
domainguid_line = ""
descr = b64encode(get_domain_descriptor(names.domainsid)).decode('utf8')
setup_add_ldif(samdb, setup_path("provision_basedn.ldif"), {
"DOMAINDN": names.domaindn,
"DOMAINSID": str(names.domainsid),
"DESCRIPTOR": descr,
"DOMAINGUID": domainguid_line
})
setup_modify_ldif(samdb, setup_path("provision_basedn_modify.ldif"), {
"DOMAINDN": names.domaindn,
"CREATTIME": str(samba.unix2nttime(int(time.time()))),
"NEXTRID": str(next_rid),
"DEFAULTSITE": names.sitename,
"CONFIGDN": names.configdn,
"POLICYGUID": policyguid,
"DOMAIN_FUNCTIONALITY": str(domainFunctionality),
"SAMBA_VERSION_STRING": version,
"MIN_PWD_LENGTH": str(DEFAULT_MIN_PWD_LENGTH)
})
# If we are setting up a subdomain, then this has been replicated in, so we don't need to add it
if fill == FILL_FULL:
logger.info("Adding configuration container")
descr = b64encode(get_config_descriptor(names.domainsid)).decode('utf8')
setup_add_ldif(samdb, setup_path("provision_configuration_basedn.ldif"), {
"CONFIGDN": names.configdn,
"DESCRIPTOR": descr,
})
# The LDIF here was created when the Schema object was constructed
ignore_checks_oid = "local_oid:%s:0" % samba.dsdb.DSDB_CONTROL_SKIP_DUPLICATES_CHECK_OID
schema_controls = [
"provision:0",
"relax:0",
ignore_checks_oid
]
logger.info("Setting up sam.ldb schema")
samdb.add_ldif(schema.schema_dn_add, controls=schema_controls)
samdb.modify_ldif(schema.schema_dn_modify, controls=schema_controls)
samdb.write_prefixes_from_schema()
samdb.add_ldif(schema.schema_data, controls=schema_controls)
setup_add_ldif(samdb, setup_path("aggregate_schema.ldif"),
{"SCHEMADN": names.schemadn},
controls=schema_controls)
# Now register this container in the root of the forest
msg = ldb.Message(ldb.Dn(samdb, names.domaindn))
msg["subRefs"] = ldb.MessageElement(names.configdn, ldb.FLAG_MOD_ADD,
"subRefs")
samdb.invocation_id = invocationid
# If we are setting up a subdomain, then this has been replicated in, so we don't need to add it
if fill == FILL_FULL:
logger.info("Setting up sam.ldb configuration data")
partitions_descr = b64encode(get_config_partitions_descriptor(names.domainsid)).decode('utf8')
sites_descr = b64encode(get_config_sites_descriptor(names.domainsid)).decode('utf8')
ntdsquotas_descr = b64encode(get_config_ntds_quotas_descriptor(names.domainsid)).decode('utf8')
protected1_descr = b64encode(get_config_delete_protected1_descriptor(names.domainsid)).decode('utf8')
protected1wd_descr = b64encode(get_config_delete_protected1wd_descriptor(names.domainsid)).decode('utf8')
protected2_descr = b64encode(get_config_delete_protected2_descriptor(names.domainsid)).decode('utf8')
if "2008" in schema.base_schema:
# exclude 2012-specific changes if we're using a 2008 schema
incl_2012 = "#"
else:
incl_2012 = ""
setup_add_ldif(samdb, setup_path("provision_configuration.ldif"), {
"CONFIGDN": names.configdn,
"NETBIOSNAME": names.netbiosname,
"DEFAULTSITE": names.sitename,
"DNSDOMAIN": names.dnsdomain,
"DOMAIN": names.domain,
"SCHEMADN": names.schemadn,
"DOMAINDN": names.domaindn,
"SERVERDN": names.serverdn,
"FOREST_FUNCTIONALITY": str(forestFunctionality),
"DOMAIN_FUNCTIONALITY": str(domainFunctionality),
"NTDSQUOTAS_DESCRIPTOR": ntdsquotas_descr,
"LOSTANDFOUND_DESCRIPTOR": protected1wd_descr,
"SERVICES_DESCRIPTOR": protected1_descr,
"PHYSICALLOCATIONS_DESCRIPTOR": protected1wd_descr,
"FORESTUPDATES_DESCRIPTOR": protected1wd_descr,
"EXTENDEDRIGHTS_DESCRIPTOR": protected2_descr,
"PARTITIONS_DESCRIPTOR": partitions_descr,
"SITES_DESCRIPTOR": sites_descr,
})
setup_add_ldif(samdb, setup_path("extended-rights.ldif"), {
"CONFIGDN": names.configdn,
"INC2012": incl_2012,
})
logger.info("Setting up display specifiers")
display_specifiers_ldif = read_ms_ldif(
setup_path('display-specifiers/DisplaySpecifiers-Win2k8R2.txt'))
display_specifiers_ldif = substitute_var(display_specifiers_ldif,
{"CONFIGDN": names.configdn})
check_all_substituted(display_specifiers_ldif)
samdb.add_ldif(display_specifiers_ldif)
logger.info("Modifying display specifiers and extended rights")
setup_modify_ldif(samdb,
setup_path("provision_configuration_modify.ldif"), {
"CONFIGDN": names.configdn,
"DISPLAYSPECIFIERS_DESCRIPTOR": protected2_descr
})
logger.info("Adding users container")
users_desc = b64encode(get_domain_users_descriptor(names.domainsid)).decode('utf8')
setup_add_ldif(samdb, setup_path("provision_users_add.ldif"), {
"DOMAINDN": names.domaindn,
"USERS_DESCRIPTOR": users_desc
})
logger.info("Modifying users container")
setup_modify_ldif(samdb, setup_path("provision_users_modify.ldif"), {
"DOMAINDN": names.domaindn})
logger.info("Adding computers container")
computers_desc = b64encode(get_domain_computers_descriptor(names.domainsid)).decode('utf8')
setup_add_ldif(samdb, setup_path("provision_computers_add.ldif"), {
"DOMAINDN": names.domaindn,
"COMPUTERS_DESCRIPTOR": computers_desc
})
logger.info("Modifying computers container")
setup_modify_ldif(samdb,
setup_path("provision_computers_modify.ldif"), {
"DOMAINDN": names.domaindn})
logger.info("Setting up sam.ldb data")
infrastructure_desc = b64encode(get_domain_infrastructure_descriptor(names.domainsid)).decode('utf8')
lostandfound_desc = b64encode(get_domain_delete_protected2_descriptor(names.domainsid)).decode('utf8')
system_desc = b64encode(get_domain_delete_protected1_descriptor(names.domainsid)).decode('utf8')
builtin_desc = b64encode(get_domain_builtin_descriptor(names.domainsid)).decode('utf8')
controllers_desc = b64encode(get_domain_controllers_descriptor(names.domainsid)).decode('utf8')
setup_add_ldif(samdb, setup_path("provision.ldif"), {
"CREATTIME": str(samba.unix2nttime(int(time.time()))),
"DOMAINDN": names.domaindn,
"NETBIOSNAME": names.netbiosname,
"DEFAULTSITE": names.sitename,
"CONFIGDN": names.configdn,
"SERVERDN": names.serverdn,
"RIDAVAILABLESTART": str(next_rid + 600),
"POLICYGUID_DC": policyguid_dc,
"INFRASTRUCTURE_DESCRIPTOR": infrastructure_desc,
"LOSTANDFOUND_DESCRIPTOR": lostandfound_desc,
"SYSTEM_DESCRIPTOR": system_desc,
"BUILTIN_DESCRIPTOR": builtin_desc,
"DOMAIN_CONTROLLERS_DESCRIPTOR": controllers_desc,
})
# If we are setting up a subdomain, then this has been replicated in, so we don't need to add it
if fill == FILL_FULL:
managedservice_descr = b64encode(get_managed_service_accounts_descriptor(names.domainsid)).decode('utf8')
setup_modify_ldif(samdb,
setup_path("provision_configuration_references.ldif"), {
"CONFIGDN": names.configdn,
"SCHEMADN": names.schemadn})
logger.info("Setting up well known security principals")
protected1wd_descr = b64encode(get_config_delete_protected1wd_descriptor(names.domainsid)).decode('utf8')
setup_add_ldif(samdb, setup_path("provision_well_known_sec_princ.ldif"), {
"CONFIGDN": names.configdn,
"WELLKNOWNPRINCIPALS_DESCRIPTOR": protected1wd_descr,
}, controls=["relax:0", "provision:0"])
if fill == FILL_FULL or fill == FILL_SUBDOMAIN:
setup_modify_ldif(samdb,
setup_path("provision_basedn_references.ldif"), {
"DOMAINDN": names.domaindn,
"MANAGEDSERVICE_DESCRIPTOR": managedservice_descr
})
logger.info("Setting up sam.ldb users and groups")
setup_add_ldif(samdb, setup_path("provision_users.ldif"), {
"DOMAINDN": names.domaindn,
"DOMAINSID": str(names.domainsid),
"ADMINPASS_B64": b64encode(adminpass.encode('utf-16-le')).decode('utf8'),
"KRBTGTPASS_B64": b64encode(krbtgtpass.encode('utf-16-le')).decode('utf8')
}, controls=["relax:0", "provision:0"])
logger.info("Setting up self join")
setup_self_join(samdb, admin_session_info, names=names, fill=fill,
invocationid=invocationid,
dns_backend=dns_backend,
dnspass=dnspass,
machinepass=machinepass,
domainsid=names.domainsid,
next_rid=next_rid,
dc_rid=dc_rid,
policyguid=policyguid,
policyguid_dc=policyguid_dc,
domainControllerFunctionality=domainControllerFunctionality,
ntdsguid=ntdsguid)
ntds_dn = "CN=NTDS Settings,%s" % names.serverdn
names.ntdsguid = samdb.searchone(basedn=ntds_dn,
attribute="objectGUID", expression="", scope=ldb.SCOPE_BASE).decode('utf8')
assert isinstance(names.ntdsguid, str)
return samdb
SYSVOL_ACL = "O:LAG:BAD:P(A;OICI;FA;;;BA)(A;OICI;0x1200a9;;;SO)(A;OICI;FA;;;SY)(A;OICI;0x1200a9;;;AU)"
POLICIES_ACL = "O:LAG:BAD:P(A;OICI;FA;;;BA)(A;OICI;0x1200a9;;;SO)(A;OICI;FA;;;SY)(A;OICI;0x1200a9;;;AU)(A;OICI;0x1301bf;;;PA)"
SYSVOL_SERVICE = "sysvol"
def set_dir_acl(path, acl, lp, domsid, use_ntvfs, passdb, service=SYSVOL_SERVICE):
session_info = system_session_unix()
setntacl(lp, path, acl, domsid, session_info, use_ntvfs=use_ntvfs, skip_invalid_chown=True, passdb=passdb, service=service)
for root, dirs, files in os.walk(path, topdown=False):
for name in files:
setntacl(lp, os.path.join(root, name), acl, domsid, session_info,
use_ntvfs=use_ntvfs, skip_invalid_chown=True, passdb=passdb, service=service)
for name in dirs:
setntacl(lp, os.path.join(root, name), acl, domsid, session_info,
use_ntvfs=use_ntvfs, skip_invalid_chown=True, passdb=passdb, service=service)
def set_gpos_acl(sysvol, dnsdomain, domainsid, domaindn, samdb, lp, use_ntvfs, passdb):
"""Set ACL on the sysvol/<dnsname>/Policies folder and the policy
folders beneath.
:param sysvol: Physical path for the sysvol folder
:param dnsdomain: The DNS name of the domain
:param domainsid: The SID of the domain
:param domaindn: The DN of the domain (ie. DC=...)
:param samdb: An LDB object on the SAM db
:param lp: an LP object
"""
# Set ACL for GPO root folder
root_policy_path = os.path.join(sysvol, dnsdomain, "Policies")
session_info = system_session_unix()
setntacl(lp, root_policy_path, POLICIES_ACL, str(domainsid), session_info,
use_ntvfs=use_ntvfs, skip_invalid_chown=True, passdb=passdb, service=SYSVOL_SERVICE)
res = samdb.search(base="CN=Policies,CN=System,%s" %(domaindn),
attrs=["cn", "nTSecurityDescriptor"],
expression="", scope=ldb.SCOPE_ONELEVEL)
for policy in res:
acl = ndr_unpack(security.descriptor,
policy["nTSecurityDescriptor"][0]).as_sddl()
policy_path = getpolicypath(sysvol, dnsdomain, str(policy["cn"]))
set_dir_acl(policy_path, dsacl2fsacl(acl, domainsid), lp,
str(domainsid), use_ntvfs,
passdb=passdb)
def setsysvolacl(samdb, netlogon, sysvol, uid, gid, domainsid, dnsdomain,
domaindn, lp, use_ntvfs):
"""Set the ACL for the sysvol share and the subfolders
:param samdb: An LDB object on the SAM db
:param netlogon: Physical path for the netlogon folder
:param sysvol: Physical path for the sysvol folder
:param uid: The UID of the "Administrator" user
:param gid: The GID of the "Domain administrators" group
:param domainsid: The SID of the domain
:param dnsdomain: The DNS name of the domain
:param domaindn: The DN of the domain (ie. DC=...)
"""
s4_passdb = None
if not use_ntvfs:
s3conf = s3param.get_context()
s3conf.load(lp.configfile)
file = tempfile.NamedTemporaryFile(dir=os.path.abspath(sysvol))
try:
try:
smbd.set_simple_acl(file.name, 0o755, system_session_unix(), gid)
except OSError:
if not smbd.have_posix_acls():
# This clue is only strictly correct for RPM and
# Debian-like Linux systems, but hopefully other users
# will get enough clue from it.
raise ProvisioningError("Samba was compiled without the posix ACL support that s3fs requires. "
"Try installing libacl1-dev or libacl-devel, then re-run configure and make.")
raise ProvisioningError("Your filesystem or build does not support posix ACLs, which s3fs requires. "
"Try the mounting the filesystem with the 'acl' option.")
try:
smbd.chown(file.name, uid, gid, system_session_unix())
except OSError:
raise ProvisioningError("Unable to chown a file on your filesystem. "
"You may not be running provision as root.")
finally:
file.close()
# This will ensure that the smbd code we are running when setting ACLs
# is initialised with the smb.conf
s3conf = s3param.get_context()
s3conf.load(lp.configfile)
# ensure we are using the right samba_dsdb passdb backend, no matter what
s3conf.set("passdb backend", "samba_dsdb:%s" % samdb.url)
passdb.reload_static_pdb()
# ensure that we init the samba_dsdb backend, so the domain sid is
# marked in secrets.tdb
s4_passdb = passdb.PDB(s3conf.get("passdb backend"))
# now ensure everything matches correctly, to avoid weird issues
if passdb.get_global_sam_sid() != domainsid:
raise ProvisioningError('SID as seen by smbd [%s] does not match SID as seen by the provision script [%s]!' % (passdb.get_global_sam_sid(), domainsid))
domain_info = s4_passdb.domain_info()
if domain_info["dom_sid"] != domainsid:
raise ProvisioningError('SID as seen by pdb_samba_dsdb [%s] does not match SID as seen by the provision script [%s]!' % (domain_info["dom_sid"], domainsid))
if domain_info["dns_domain"].upper() != dnsdomain.upper():
raise ProvisioningError('Realm as seen by pdb_samba_dsdb [%s] does not match Realm as seen by the provision script [%s]!' % (domain_info["dns_domain"].upper(), dnsdomain.upper()))
try:
if use_ntvfs:
os.chown(sysvol, -1, gid)
except OSError:
canchown = False
else:
canchown = True
# use admin sid dn as user dn, since admin should own most of the files,
# the operation will be much faster
userdn = '<SID={}-{}>'.format(domainsid, security.DOMAIN_RID_ADMINISTRATOR)
flags = (auth.AUTH_SESSION_INFO_DEFAULT_GROUPS |
auth.AUTH_SESSION_INFO_AUTHENTICATED |
auth.AUTH_SESSION_INFO_SIMPLE_PRIVILEGES)
session_info = auth.user_session(samdb, lp_ctx=lp, dn=userdn,
session_info_flags=flags)
auth.session_info_set_unix(session_info,
lp_ctx=lp,
user_name="Administrator",
uid=uid,
gid=gid)
def _setntacl(path):
"""A helper to reuse args"""
return setntacl(
lp, path, SYSVOL_ACL, str(domainsid), session_info,
use_ntvfs=use_ntvfs, skip_invalid_chown=True, passdb=s4_passdb,
service=SYSVOL_SERVICE)
# Set the SYSVOL_ACL on the sysvol folder and subfolder (first level)
_setntacl(sysvol)
for root, dirs, files in os.walk(sysvol, topdown=False):
for name in files:
if use_ntvfs and canchown:
os.chown(os.path.join(root, name), -1, gid)
_setntacl(os.path.join(root, name))
for name in dirs:
if use_ntvfs and canchown:
os.chown(os.path.join(root, name), -1, gid)
_setntacl(os.path.join(root, name))
# Set acls on Policy folder and policies folders
set_gpos_acl(sysvol, dnsdomain, domainsid, domaindn, samdb, lp, use_ntvfs, passdb=s4_passdb)
def acl_type(direct_db_access):
if direct_db_access:
return "DB"
else:
return "VFS"
def check_dir_acl(path, acl, lp, domainsid, direct_db_access):
session_info = system_session_unix()
fsacl = getntacl(lp, path, session_info, direct_db_access=direct_db_access, service=SYSVOL_SERVICE)
fsacl_sddl = fsacl.as_sddl(domainsid)
if fsacl_sddl != acl:
raise ProvisioningError('%s ACL on GPO directory %s %s does not match expected value %s from GPO object' % (acl_type(direct_db_access), path, fsacl_sddl, acl))
for root, dirs, files in os.walk(path, topdown=False):
for name in files:
fsacl = getntacl(lp, os.path.join(root, name), session_info,
direct_db_access=direct_db_access, service=SYSVOL_SERVICE)
if fsacl is None:
raise ProvisioningError('%s ACL on GPO file %s not found!' %
(acl_type(direct_db_access),
os.path.join(root, name)))
fsacl_sddl = fsacl.as_sddl(domainsid)
if fsacl_sddl != acl:
raise ProvisioningError('%s ACL on GPO file %s %s does not match expected value %s from GPO object' % (acl_type(direct_db_access), os.path.join(root, name), fsacl_sddl, acl))
for name in dirs:
fsacl = getntacl(lp, os.path.join(root, name), session_info,
direct_db_access=direct_db_access, service=SYSVOL_SERVICE)
if fsacl is None:
raise ProvisioningError('%s ACL on GPO directory %s not found!'
% (acl_type(direct_db_access),
os.path.join(root, name)))
fsacl_sddl = fsacl.as_sddl(domainsid)
if fsacl_sddl != acl:
raise ProvisioningError('%s ACL on GPO directory %s %s does not match expected value %s from GPO object' % (acl_type(direct_db_access), os.path.join(root, name), fsacl_sddl, acl))
def check_gpos_acl(sysvol, dnsdomain, domainsid, domaindn, samdb, lp,
direct_db_access):
"""Set ACL on the sysvol/<dnsname>/Policies folder and the policy
folders beneath.
:param sysvol: Physical path for the sysvol folder
:param dnsdomain: The DNS name of the domain
:param domainsid: The SID of the domain
:param domaindn: The DN of the domain (ie. DC=...)
:param samdb: An LDB object on the SAM db
:param lp: an LP object
"""
# Set ACL for GPO root folder
root_policy_path = os.path.join(sysvol, dnsdomain, "Policies")
session_info = system_session_unix()
fsacl = getntacl(lp, root_policy_path, session_info,
direct_db_access=direct_db_access, service=SYSVOL_SERVICE)
if fsacl is None:
raise ProvisioningError('DB ACL on policy root %s %s not found!' % (acl_type(direct_db_access), root_policy_path))
fsacl_sddl = fsacl.as_sddl(domainsid)
if fsacl_sddl != POLICIES_ACL:
raise ProvisioningError('%s ACL on policy root %s %s does not match expected value %s from provision' % (acl_type(direct_db_access), root_policy_path, fsacl_sddl, fsacl))
res = samdb.search(base="CN=Policies,CN=System,%s" %(domaindn),
attrs=["cn", "nTSecurityDescriptor"],
expression="", scope=ldb.SCOPE_ONELEVEL)
for policy in res:
acl = ndr_unpack(security.descriptor,
policy["nTSecurityDescriptor"][0]).as_sddl()
policy_path = getpolicypath(sysvol, dnsdomain, str(policy["cn"]))
check_dir_acl(policy_path, dsacl2fsacl(acl, domainsid), lp,
domainsid, direct_db_access)
def checksysvolacl(samdb, netlogon, sysvol, domainsid, dnsdomain, domaindn,
lp):
"""Set the ACL for the sysvol share and the subfolders
:param samdb: An LDB object on the SAM db
:param netlogon: Physical path for the netlogon folder
:param sysvol: Physical path for the sysvol folder
:param uid: The UID of the "Administrator" user
:param gid: The GID of the "Domain administrators" group
:param domainsid: The SID of the domain
:param dnsdomain: The DNS name of the domain
:param domaindn: The DN of the domain (ie. DC=...)
"""
# This will ensure that the smbd code we are running when setting ACLs is initialised with the smb.conf
s3conf = s3param.get_context()
s3conf.load(lp.configfile)
# ensure we are using the right samba_dsdb passdb backend, no matter what
s3conf.set("passdb backend", "samba_dsdb:%s" % samdb.url)
# ensure that we init the samba_dsdb backend, so the domain sid is marked in secrets.tdb
s4_passdb = passdb.PDB(s3conf.get("passdb backend"))
# now ensure everything matches correctly, to avoid weird issues
if passdb.get_global_sam_sid() != domainsid:
raise ProvisioningError('SID as seen by smbd [%s] does not match SID as seen by the provision script [%s]!' % (passdb.get_global_sam_sid(), domainsid))
domain_info = s4_passdb.domain_info()
if domain_info["dom_sid"] != domainsid:
raise ProvisioningError('SID as seen by pdb_samba_dsdb [%s] does not match SID as seen by the provision script [%s]!' % (domain_info["dom_sid"], domainsid))
if domain_info["dns_domain"].upper() != dnsdomain.upper():
raise ProvisioningError('Realm as seen by pdb_samba_dsdb [%s] does not match Realm as seen by the provision script [%s]!' % (domain_info["dns_domain"].upper(), dnsdomain.upper()))
# Ensure we can read this directly, and via the smbd VFS
session_info = system_session_unix()
for direct_db_access in [True, False]:
# Check the SYSVOL_ACL on the sysvol folder and subfolder (first level)
for dir_path in [os.path.join(sysvol, dnsdomain), netlogon]:
fsacl = getntacl(lp, dir_path, session_info, direct_db_access=direct_db_access, service=SYSVOL_SERVICE)
if fsacl is None:
raise ProvisioningError('%s ACL on sysvol directory %s not found!' % (acl_type(direct_db_access), dir_path))
fsacl_sddl = fsacl.as_sddl(domainsid)
if fsacl_sddl != SYSVOL_ACL:
raise ProvisioningError('%s ACL on sysvol directory %s %s does not match expected value %s from provision' % (acl_type(direct_db_access), dir_path, fsacl_sddl, SYSVOL_ACL))
# Check acls on Policy folder and policies folders
check_gpos_acl(sysvol, dnsdomain, domainsid, domaindn, samdb, lp,
direct_db_access)
def interface_ips_v4(lp, all_interfaces=False):
"""return only IPv4 IPs"""
ips = samba.interface_ips(lp, all_interfaces)
ret = []
for i in ips:
if i.find(':') == -1:
ret.append(i)
return ret
def interface_ips_v6(lp):
"""return only IPv6 IPs"""
ips = samba.interface_ips(lp, False)
ret = []
for i in ips:
if i.find(':') != -1:
ret.append(i)
return ret
def provision_fill(samdb, secrets_ldb, logger, names, paths,
schema=None,
targetdir=None, samdb_fill=FILL_FULL,
hostip=None, hostip6=None,
next_rid=1000, dc_rid=None, adminpass=None, krbtgtpass=None,
domainguid=None, policyguid=None, policyguid_dc=None,
invocationid=None, machinepass=None, ntdsguid=None,
dns_backend=None, dnspass=None,
serverrole=None, dom_for_fun_level=None,
am_rodc=False, lp=None, use_ntvfs=False,
skip_sysvolacl=False, backend_store=None,
backend_store_size=None):
# create/adapt the group policy GUIDs
# Default GUID for default policy are described at
# "How Core Group Policy Works"
# http://technet.microsoft.com/en-us/library/cc784268%28WS.10%29.aspx
if policyguid is None:
policyguid = DEFAULT_POLICY_GUID
policyguid = policyguid.upper()
if policyguid_dc is None:
policyguid_dc = DEFAULT_DC_POLICY_GUID
policyguid_dc = policyguid_dc.upper()
if invocationid is None:
invocationid = str(uuid.uuid4())
if krbtgtpass is None:
# Note that the machinepass value is ignored
# as the backend (password_hash.c) will generate its
# own random values for the krbtgt keys
krbtgtpass = samba.generate_random_machine_password(128, 255)
if machinepass is None:
machinepass = samba.generate_random_machine_password(120, 120)
if dnspass is None:
dnspass = samba.generate_random_password(120, 120)
samdb.transaction_start()
try:
samdb = fill_samdb(samdb, lp, names, logger=logger,
schema=schema,
policyguid=policyguid, policyguid_dc=policyguid_dc,
fill=samdb_fill, adminpass=adminpass, krbtgtpass=krbtgtpass,
invocationid=invocationid, machinepass=machinepass,
dns_backend=dns_backend, dnspass=dnspass,
ntdsguid=ntdsguid, serverrole=serverrole,
dom_for_fun_level=dom_for_fun_level, am_rodc=am_rodc,
next_rid=next_rid, dc_rid=dc_rid,
backend_store=backend_store,
backend_store_size=backend_store_size)
# Set up group policies (domain policy and domain controller
# policy)
if serverrole == "active directory domain controller":
create_default_gpo(paths.sysvol, names.dnsdomain, policyguid,
policyguid_dc)
except:
samdb.transaction_cancel()
raise
else:
samdb.transaction_commit()
if serverrole == "active directory domain controller":
# Continue setting up sysvol for GPO. This appears to require being
# outside a transaction.
if not skip_sysvolacl:
setsysvolacl(samdb, paths.netlogon, paths.sysvol, paths.root_uid,
paths.root_gid, names.domainsid, names.dnsdomain,
names.domaindn, lp, use_ntvfs)
else:
logger.info("Setting acl on sysvol skipped")
secretsdb_self_join(secrets_ldb, domain=names.domain,
realm=names.realm, dnsdomain=names.dnsdomain,
netbiosname=names.netbiosname, domainsid=names.domainsid,
machinepass=machinepass, secure_channel_type=SEC_CHAN_BDC)
# Now set up the right msDS-SupportedEncryptionTypes into the DB
# In future, this might be determined from some configuration
kerberos_enctypes = str(ENC_ALL_TYPES)
try:
msg = ldb.Message(ldb.Dn(samdb,
samdb.searchone("distinguishedName",
expression="samAccountName=%s$" % names.netbiosname,
scope=ldb.SCOPE_SUBTREE).decode('utf8')))
msg["msDS-SupportedEncryptionTypes"] = ldb.MessageElement(
elements=kerberos_enctypes, flags=ldb.FLAG_MOD_REPLACE,
name="msDS-SupportedEncryptionTypes")
samdb.modify(msg)
except ldb.LdbError as e:
(enum, estr) = e.args
if enum != ldb.ERR_NO_SUCH_ATTRIBUTE:
# It might be that this attribute does not exist in this schema
raise
setup_ad_dns(samdb, secrets_ldb, names, paths, lp, logger,
hostip=hostip, hostip6=hostip6, dns_backend=dns_backend,
dnspass=dnspass, os_level=dom_for_fun_level,
targetdir=targetdir, fill_level=samdb_fill,
backend_store=backend_store)
domainguid = samdb.searchone(basedn=samdb.get_default_basedn(),
attribute="objectGUID").decode('utf8')
assert isinstance(domainguid, str)
lastProvisionUSNs = get_last_provision_usn(samdb)
maxUSN = get_max_usn(samdb, str(names.rootdn))
if lastProvisionUSNs is not None:
update_provision_usn(samdb, 0, maxUSN, invocationid, 1)
else:
set_provision_usn(samdb, 0, maxUSN, invocationid)
logger.info("Setting up sam.ldb rootDSE marking as synchronized")
setup_modify_ldif(samdb, setup_path("provision_rootdse_modify.ldif"),
{'NTDSGUID': names.ntdsguid})
# fix any dangling GUIDs from the provision
logger.info("Fixing provision GUIDs")
chk = dbcheck(samdb, samdb_schema=samdb, verbose=False, fix=True, yes=True,
quiet=True)
samdb.transaction_start()
try:
# a small number of GUIDs are missing because of ordering issues in the
# provision code
for schema_obj in ['CN=Domain', 'CN=Organizational-Person', 'CN=Contact', 'CN=inetOrgPerson']:
chk.check_database(DN="%s,%s" % (schema_obj, names.schemadn),
scope=ldb.SCOPE_BASE,
attrs=['defaultObjectCategory'])
chk.check_database(DN="CN=IP Security,CN=System,%s" % names.domaindn,
scope=ldb.SCOPE_ONELEVEL,
attrs=['ipsecOwnersReference',
'ipsecFilterReference',
'ipsecISAKMPReference',
'ipsecNegotiationPolicyReference',
'ipsecNFAReference'])
if chk.check_database(DN=names.schemadn, scope=ldb.SCOPE_SUBTREE,
attrs=['attributeId', 'governsId']) != 0:
raise ProvisioningError("Duplicate attributeId or governsId in schema. Must be fixed manually!!")
except:
samdb.transaction_cancel()
raise
else:
samdb.transaction_commit()
_ROLES_MAP = {
"ROLE_STANDALONE": "standalone server",
"ROLE_DOMAIN_MEMBER": "member server",
"ROLE_DOMAIN_BDC": "active directory domain controller",
"ROLE_DOMAIN_PDC": "active directory domain controller",
"dc": "active directory domain controller",
"member": "member server",
"domain controller": "active directory domain controller",
"active directory domain controller": "active directory domain controller",
"member server": "member server",
"standalone": "standalone server",
"standalone server": "standalone server",
}
def sanitize_server_role(role):
"""Sanitize a server role name.
:param role: Server role
:raise ValueError: If the role can not be interpreted
:return: Sanitized server role (one of "member server",
"active directory domain controller", "standalone server")
"""
try:
return _ROLES_MAP[role]
except KeyError:
raise ValueError(role)
def provision_fake_ypserver(logger, samdb, domaindn, netbiosname, nisdomain,
maxuid, maxgid):
"""Create AD entries for the fake ypserver.
This is needed for being able to manipulate posix attrs via ADUC.
"""
samdb.transaction_start()
try:
logger.info("Setting up fake yp server settings")
setup_add_ldif(samdb, setup_path("ypServ30.ldif"), {
"DOMAINDN": domaindn,
"NETBIOSNAME": netbiosname,
"NISDOMAIN": nisdomain,
})
except:
samdb.transaction_cancel()
raise
else:
samdb.transaction_commit()
def directory_create_or_exists(path, mode=0o755):
if not os.path.exists(path):
try:
os.mkdir(path, mode)
except OSError as e:
if e.errno in [errno.EEXIST]:
pass
else:
raise ProvisioningError("Failed to create directory %s: %s" % (path, e.strerror))
def determine_host_ip(logger, lp, hostip=None):
if hostip is None:
logger.info("Looking up IPv4 addresses")
hostips = interface_ips_v4(lp)
if len(hostips) > 0:
hostip = hostips[0]
if len(hostips) > 1:
logger.warning("More than one IPv4 address found. Using %s",
hostip)
if hostip == "127.0.0.1":
hostip = None
if hostip is None:
logger.warning("No IPv4 address will be assigned")
return hostip
def determine_host_ip6(logger, lp, hostip6=None):
if hostip6 is None:
logger.info("Looking up IPv6 addresses")
hostips = interface_ips_v6(lp)
if hostips:
hostip6 = hostips[0]
if len(hostips) > 1:
logger.warning("More than one IPv6 address found. Using %s", hostip6)
if hostip6 is None:
logger.warning("No IPv6 address will be assigned")
return hostip6
def provision(logger, session_info, smbconf=None,
targetdir=None, samdb_fill=FILL_FULL, realm=None, rootdn=None,
domaindn=None, schemadn=None, configdn=None, serverdn=None,
domain=None, hostname=None, hostip=None, hostip6=None, domainsid=None,
next_rid=1000, dc_rid=None, adminpass=None, ldapadminpass=None,
krbtgtpass=None, domainguid=None, policyguid=None, policyguid_dc=None,
dns_backend=None, dns_forwarder=None, dnspass=None,
invocationid=None, machinepass=None, ntdsguid=None,
root=None, nobody=None, users=None, backup=None,
sitename=None, serverrole=None, dom_for_fun_level=None,
useeadb=False, am_rodc=False, lp=None, use_ntvfs=False,
use_rfc2307=False, maxuid=None, maxgid=None, skip_sysvolacl=True,
base_schema="2019", adprep_level=DS_DOMAIN_FUNCTION_2016,
plaintext_secrets=False, backend_store=None,
backend_store_size=None, batch_mode=False):
"""Provision samba4
:note: caution, this wipes all existing data!
"""
try:
serverrole = sanitize_server_role(serverrole)
except ValueError:
raise ProvisioningError('server role (%s) should be one of "active directory domain controller", "member server", "standalone server"' % serverrole)
if dom_for_fun_level is None:
dom_for_fun_level = DS_DOMAIN_FUNCTION_2008_R2
if base_schema in ["2008_R2", "2008_R2_old"]:
max_adprep_level = DS_DOMAIN_FUNCTION_2008_R2
elif base_schema in ["2012"]:
max_adprep_level = DS_DOMAIN_FUNCTION_2012
elif base_schema in ["2012_R2"]:
max_adprep_level = DS_DOMAIN_FUNCTION_2012_R2
else:
max_adprep_level = DS_DOMAIN_FUNCTION_2016
if max_adprep_level < dom_for_fun_level:
raise ProvisioningError('dom_for_fun_level[%u] incompatible with base_schema[%s]' %
(dom_for_fun_level, base_schema))
if adprep_level is not None and max_adprep_level < adprep_level:
raise ProvisioningError('base_schema[%s] incompatible with adprep_level[%u]' %
(base_schema, adprep_level))
if adprep_level is not None and adprep_level < dom_for_fun_level:
raise ProvisioningError('dom_for_fun_level[%u] incompatible with adprep_level[%u]' %
(dom_for_fun_level, adprep_level))
if ldapadminpass is None:
# Make a new, random password between Samba and it's LDAP server
ldapadminpass = samba.generate_random_password(128, 255)
if backend_store is None:
backend_store = get_default_backend_store()
if domainsid is None:
domainsid = security.random_sid()
root_uid = get_root_uid([root or "root"], logger)
nobody_uid = findnss_uid([nobody or "nobody"])
users_gid = findnss_gid([users or "users", 'users', 'other', 'staff'])
root_gid = pwd.getpwuid(root_uid).pw_gid
try:
bind_gid = findnss_gid(["bind", "named"])
except KeyError:
bind_gid = None
if targetdir is not None:
smbconf = os.path.join(targetdir, "etc", "smb.conf")
elif smbconf is None:
smbconf = samba.param.default_path()
if not os.path.exists(os.path.dirname(smbconf)):
os.makedirs(os.path.dirname(smbconf))
server_services = []
global_param = {}
if use_rfc2307:
global_param["idmap_ldb:use rfc2307"] = ["yes"]
if dns_backend != "SAMBA_INTERNAL":
server_services.append("-dns")
else:
if dns_forwarder is not None:
global_param["dns forwarder"] = [dns_forwarder]
if use_ntvfs:
server_services.append("+smb")
server_services.append("-s3fs")
global_param["dcerpc endpoint servers"] = ["+winreg", "+srvsvc"]
if len(server_services) > 0:
global_param["server services"] = server_services
# only install a new smb.conf if there isn't one there already
if os.path.exists(smbconf):
# if Samba Team members can't figure out the weird errors
# loading an empty smb.conf gives, then we need to be smarter.
# Pretend it just didn't exist --abartlet
f = open(smbconf, 'r')
try:
data = f.read().lstrip()
finally:
f.close()
if data is None or data == "":
make_smbconf(smbconf, hostname, domain, realm,
targetdir, serverrole=serverrole,
eadb=useeadb, use_ntvfs=use_ntvfs,
lp=lp, global_param=global_param)
else:
make_smbconf(smbconf, hostname, domain, realm, targetdir,
serverrole=serverrole,
eadb=useeadb, use_ntvfs=use_ntvfs, lp=lp, global_param=global_param)
if lp is None:
lp = samba.param.LoadParm()
lp.load(smbconf)
names = guess_names(lp=lp, hostname=hostname, domain=domain,
dnsdomain=realm, serverrole=serverrole, domaindn=domaindn,
configdn=configdn, schemadn=schemadn, serverdn=serverdn,
sitename=sitename, rootdn=rootdn, domain_names_forced=(samdb_fill == FILL_DRS))
paths = provision_paths_from_lp(lp, names.dnsdomain)
paths.bind_gid = bind_gid
paths.root_uid = root_uid
paths.root_gid = root_gid
hostip = determine_host_ip(logger, lp, hostip)
hostip6 = determine_host_ip6(logger, lp, hostip6)
names.hostip = hostip
names.hostip6 = hostip6
names.domainguid = domainguid
names.domainsid = domainsid
names.forestsid = domainsid
if serverrole is None:
serverrole = lp.get("server role")
directory_create_or_exists(paths.private_dir, 0o700)
directory_create_or_exists(paths.binddns_dir, 0o770)
directory_create_or_exists(os.path.join(paths.private_dir, "tls"))
directory_create_or_exists(paths.state_dir)
if not plaintext_secrets:
setup_encrypted_secrets_key(paths.encrypted_secrets_key_path)
if paths.sysvol and not os.path.exists(paths.sysvol):
os.makedirs(paths.sysvol, 0o775)
schema = Schema(domainsid, invocationid=invocationid,
schemadn=names.schemadn, base_schema=base_schema)
provision_backend = LDBBackend(paths=paths,
lp=lp,
names=names, logger=logger)
provision_backend.init()
provision_backend.start()
# only install a new shares config db if there is none
if not os.path.exists(paths.shareconf):
logger.info("Setting up share.ldb")
share_ldb = Ldb(paths.shareconf, session_info=session_info, lp=lp)
share_ldb.load_ldif_file_add(setup_path("share.ldif"))
logger.info("Setting up secrets.ldb")
secrets_ldb = setup_secretsdb(paths,
session_info=session_info, lp=lp)
try:
logger.info("Setting up the registry")
setup_registry(paths.hklm, session_info, lp=lp)
logger.info("Setting up the privileges database")
setup_privileges(paths.privilege, session_info, lp=lp)
logger.info("Setting up idmap db")
idmap = setup_idmapdb(paths.idmapdb, session_info=session_info, lp=lp)
setup_name_mappings(idmap, sid=str(domainsid),
root_uid=root_uid, nobody_uid=nobody_uid,
users_gid=users_gid, root_gid=root_gid)
logger.info("Setting up SAM db")
samdb = setup_samdb(paths.samdb, session_info,
provision_backend, lp, names, logger=logger,
serverrole=serverrole,
schema=schema, fill=samdb_fill, am_rodc=am_rodc,
plaintext_secrets=plaintext_secrets,
backend_store=backend_store,
backend_store_size=backend_store_size,
batch_mode=batch_mode)
if serverrole == "active directory domain controller":
if paths.netlogon is None:
raise MissingShareError("netlogon", paths.smbconf)
if paths.sysvol is None:
raise MissingShareError("sysvol", paths.smbconf)
if not os.path.isdir(paths.netlogon):
os.makedirs(paths.netlogon, 0o755)
if adminpass is None:
adminpass = samba.generate_random_password(12, 32)
adminpass_generated = True
else:
if isinstance(adminpass, bytes):
adminpass = adminpass.decode('utf-8')
adminpass_generated = False
if samdb_fill == FILL_FULL:
provision_fill(samdb, secrets_ldb, logger, names, paths,
schema=schema, targetdir=targetdir, samdb_fill=samdb_fill,
hostip=hostip, hostip6=hostip6,
next_rid=next_rid, dc_rid=dc_rid, adminpass=adminpass,
krbtgtpass=krbtgtpass,
policyguid=policyguid, policyguid_dc=policyguid_dc,
invocationid=invocationid, machinepass=machinepass,
ntdsguid=ntdsguid, dns_backend=dns_backend,
dnspass=dnspass, serverrole=serverrole,
dom_for_fun_level=dom_for_fun_level, am_rodc=am_rodc,
lp=lp, use_ntvfs=use_ntvfs,
skip_sysvolacl=skip_sysvolacl,
backend_store=backend_store,
backend_store_size=backend_store_size)
if adprep_level is not None:
updates_allowed_overridden = False
if lp.get("dsdb:schema update allowed") is None:
lp.set("dsdb:schema update allowed", "yes")
print("Temporarily overriding 'dsdb:schema update allowed' setting")
updates_allowed_overridden = True
samdb.transaction_start()
try:
from samba.forest_update import ForestUpdate
forest = ForestUpdate(samdb, fix=True)
forest.check_updates_iterator([11, 54, 79, 80, 81, 82, 83])
forest.check_updates_functional_level(adprep_level,
DS_DOMAIN_FUNCTION_2008_R2,
update_revision=True)
samdb.transaction_commit()
except Exception as e:
samdb.transaction_cancel()
raise e
samdb.transaction_start()
try:
from samba.domain_update import DomainUpdate
DomainUpdate(samdb, fix=True).check_updates_functional_level(
adprep_level,
DS_DOMAIN_FUNCTION_2008,
update_revision=True,
)
samdb.transaction_commit()
except Exception as e:
samdb.transaction_cancel()
raise e
if updates_allowed_overridden:
lp.set("dsdb:schema update allowed", "no")
if not is_heimdal_built():
create_kdc_conf(paths.kdcconf, realm, domain, os.path.dirname(lp.get("log file")))
logger.info("The Kerberos KDC configuration for Samba AD is "
"located at %s", paths.kdcconf)
create_krb5_conf(paths.krb5conf,
dnsdomain=names.dnsdomain, hostname=names.hostname,
realm=names.realm)
logger.info("A Kerberos configuration suitable for Samba AD has been "
"generated at %s", paths.krb5conf)
logger.info("Merge the contents of this file with your system "
"krb5.conf or replace it with this one. Do not create a "
"symlink!")
if serverrole == "active directory domain controller":
create_dns_update_list(lp, logger, paths)
backend_result = provision_backend.post_setup()
provision_backend.shutdown()
except:
secrets_ldb.transaction_cancel()
raise
# Now commit the secrets.ldb to disk
secrets_ldb.transaction_commit()
# the commit creates the dns.keytab in the private directory
create_dns_dir_keytab_link(logger, paths)
result = ProvisionResult()
result.server_role = serverrole
result.domaindn = domaindn
result.paths = paths
result.names = names
result.lp = lp
result.samdb = samdb
result.idmap = idmap
result.domainsid = str(domainsid)
if samdb_fill == FILL_FULL:
result.adminpass_generated = adminpass_generated
result.adminpass = adminpass
else:
result.adminpass_generated = False
result.adminpass = None
result.backend_result = backend_result
if use_rfc2307:
provision_fake_ypserver(logger=logger, samdb=samdb,
domaindn=names.domaindn, netbiosname=names.netbiosname,
nisdomain=names.domain.lower(), maxuid=maxuid, maxgid=maxgid)
return result
def provision_become_dc(smbconf=None, targetdir=None, realm=None,
rootdn=None, domaindn=None, schemadn=None,
configdn=None, serverdn=None, domain=None,
hostname=None, domainsid=None,
machinepass=None, dnspass=None,
dns_backend=None, sitename=None, debuglevel=1,
use_ntvfs=False):
logger = logging.getLogger("provision")
samba.set_debug_level(debuglevel)
res = provision(logger, system_session(),
smbconf=smbconf, targetdir=targetdir, samdb_fill=FILL_DRS,
realm=realm, rootdn=rootdn, domaindn=domaindn, schemadn=schemadn,
configdn=configdn, serverdn=serverdn, domain=domain,
hostname=hostname, hostip=None, domainsid=domainsid,
machinepass=machinepass,
serverrole="active directory domain controller",
sitename=sitename, dns_backend=dns_backend, dnspass=dnspass,
use_ntvfs=use_ntvfs)
res.lp.set("debuglevel", str(debuglevel))
return res
def create_krb5_conf(path, dnsdomain, hostname, realm):
"""Write out a file containing a valid krb5.conf file
:param path: Path of the new krb5.conf file.
:param dnsdomain: DNS Domain name
:param hostname: Local hostname
:param realm: Realm name
"""
setup_file(setup_path("krb5.conf"), path, {
"DNSDOMAIN": dnsdomain,
"HOSTNAME": hostname,
"REALM": realm,
})
class ProvisioningError(Exception):
"""A generic provision error."""
def __init__(self, value):
self.value = value
def __str__(self):
return "ProvisioningError: " + self.value
class InvalidNetbiosName(Exception):
"""A specified name was not a valid NetBIOS name."""
def __init__(self, name):
super(InvalidNetbiosName, self).__init__(
"The name '%r' is not a valid NetBIOS name" % name)
class MissingShareError(ProvisioningError):
def __init__(self, name, smbconf):
super(MissingShareError, self).__init__(
"Existing smb.conf does not have a [%s] share, but you are "
"configuring a DC. Please remove %s or add the share manually." %
(name, smbconf))
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