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samba-mirror/source4/scripting/python/samba/join.py

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#!/usr/bin/env python
#
# python join code
# Copyright Andrew Tridgell 2010
# Copyright Andrew Bartlett 2010
#
# 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 samba.getopt as options
from samba.auth import system_session
from samba.samdb import SamDB
from samba import gensec, Ldb
import ldb, samba, sys
from samba.ndr import ndr_pack, ndr_unpack, ndr_print
from samba.dcerpc import security
from samba.dcerpc import drsuapi, misc, netlogon, nbt
from samba.credentials import Credentials, DONT_USE_KERBEROS
from samba.provision import secretsdb_self_join, provision, FILL_DRS, find_setup_dir
from samba.net import Net
import logging
from samba.drs_utils import drs_Replicate
# this makes debugging easier
samba.talloc_enable_null_tracking()
class join_ctx:
'''hold join context variables'''
pass
def join_rodc(server=None, creds=None, lp=None, site=None, netbios_name=None,
targetdir=None, domain=None):
"""join as a RODC"""
def del_noerror(samdb, dn):
try:
samdb.delete(dn)
print "Deleted %s" % dn
except:
pass
def cleanup_old_join(ctx):
'''remove any DNs from a previous join'''
try:
# find the krbtgt link
res = ctx.samdb.search(base=ctx.acct_dn, scope=ldb.SCOPE_BASE, attrs=["msDS-krbTgtLink"])
del_noerror(ctx.samdb, ctx.acct_dn)
del_noerror(ctx.samdb, ctx.connection_dn)
del_noerror(ctx.samdb, ctx.krbtgt_dn)
del_noerror(ctx.samdb, ctx.ntds_dn)
del_noerror(ctx.samdb, ctx.server_dn)
del_noerror(ctx.samdb, ctx.topology_dn)
ctx.new_krbtgt_dn = res[0]["msDS-Krbtgtlink"][0]
del_noerror(ctx.samdb, ctx.new_krbtgt_dn)
except:
pass
def find_dc(ctx, domain):
'''find a writeable DC for the given domain'''
return ctx.net.finddc(domain, nbt.NBT_SERVER_LDAP | nbt.NBT_SERVER_DS | nbt.NBT_SERVER_WRITABLE)
def get_dsServiceName(samdb):
res = samdb.search(base="", scope=ldb.SCOPE_BASE, attrs=["dsServiceName"])
return res[0]["dsServiceName"][0]
def get_dnsHostName(samdb):
res = samdb.search(base="", scope=ldb.SCOPE_BASE, attrs=["dnsHostName"])
return res[0]["dnsHostName"][0]
def get_domain_name(samdb):
'''get netbios name of the domain from the partitions record'''
partitions_dn = samdb.get_partitions_dn()
res = samdb.search(base=partitions_dn, scope=ldb.SCOPE_ONELEVEL, attrs=["nETBIOSName"],
expression='ncName=%s' % samdb.get_default_basedn())
return res[0]["nETBIOSName"][0]
def get_mysid(samdb):
res = samdb.search(base="", scope=ldb.SCOPE_BASE, attrs=["tokenGroups"])
binsid = res[0]["tokenGroups"][0]
return samdb.schema_format_value("objectSID", binsid)
def join_add_objects(ctx):
'''add the various objects needed for the join'''
print "Adding %s" % ctx.acct_dn
rec = {
"dn" : ctx.acct_dn,
"objectClass": "computer",
"displayname": ctx.samname,
"samaccountname" : ctx.samname,
"useraccountcontrol" : str(samba.dsdb.UF_WORKSTATION_TRUST_ACCOUNT |
samba.dsdb.UF_TRUSTED_TO_AUTHENTICATE_FOR_DELEGATION |
samba.dsdb.UF_PARTIAL_SECRETS_ACCOUNT),
"managedby" : ctx.admin_dn,
"dnshostname" : ctx.dnshostname,
"msDS-NeverRevealGroup" : ctx.never_reveal_sid,
"msDS-RevealOnDemandGroup" : ctx.reveal_sid}
ctx.samdb.add(rec)
print "Adding %s" % ctx.krbtgt_dn
rec = {
"dn" : ctx.krbtgt_dn,
"objectclass" : "user",
"useraccountcontrol" : str(samba.dsdb.UF_NORMAL_ACCOUNT |
samba.dsdb.UF_ACCOUNTDISABLE),
"showinadvancedviewonly" : "TRUE",
"description" : "tricky account"}
ctx.samdb.add(rec, ["rodc_join:1:1"])
# now we need to search for the samAccountName attribute on the krbtgt DN,
# as this will have been magically set to the krbtgt number
res = ctx.samdb.search(base=ctx.krbtgt_dn, scope=ldb.SCOPE_BASE, attrs=["samAccountName"])
ctx.krbtgt_name = res[0]["samAccountName"][0]
print "Got krbtgt_name=%s" % ctx.krbtgt_name
m = ldb.Message()
m.dn = ldb.Dn(ctx.samdb, ctx.acct_dn)
m["msDS-krbTgtLink"] = ldb.MessageElement(ctx.krbtgt_dn,
ldb.FLAG_MOD_REPLACE, "msDS-krbTgtLink")
ctx.samdb.modify(m)
ctx.new_krbtgt_dn = "CN=%s,CN=Users,%s" % (ctx.krbtgt_name, ctx.base_dn)
print "Renaming %s to %s" % (ctx.krbtgt_dn, ctx.new_krbtgt_dn)
ctx.samdb.rename(ctx.krbtgt_dn, ctx.new_krbtgt_dn)
print "Adding %s" % ctx.server_dn
rec = {
"dn": ctx.server_dn,
"objectclass" : "server",
"systemFlags" : str(samba.dsdb.SYSTEM_FLAG_CONFIG_ALLOW_RENAME |
samba.dsdb.SYSTEM_FLAG_CONFIG_ALLOW_LIMITED_MOVE |
samba.dsdb.SYSTEM_FLAG_DISALLOW_MOVE_ON_DELETE),
"serverReference" : ctx.acct_dn,
"dnsHostName" : ctx.dnshostname}
ctx.samdb.add(rec)
print "Adding %s" % ctx.ntds_dn
rec = {
"dn" : ctx.ntds_dn,
"objectclass" : "nTDSDSA",
"objectCategory" : "CN=NTDS-DSA-RO,%s" % ctx.schema_dn,
"systemFlags" : str(samba.dsdb.SYSTEM_FLAG_DISALLOW_MOVE_ON_DELETE),
"dMDLocation" : ctx.schema_dn,
"options" : "37",
"msDS-Behavior-Version" : "4",
"msDS-HasDomainNCs" : ctx.base_dn,
"msDS-HasFullReplicaNCs" : [ ctx.base_dn, ctx.config_dn, ctx.schema_dn ]}
ctx.samdb.add(rec, ["rodc_join:1:1"])
# find the GUID of our NTDS DN
res = ctx.samdb.search(base=ctx.ntds_dn, scope=ldb.SCOPE_BASE, attrs=["objectGUID"])
ctx.ntds_guid = misc.GUID(ctx.samdb.schema_format_value("objectGUID", res[0]["objectGUID"][0]))
print "Adding %s" % ctx.connection_dn
rec = {
"dn" : ctx.connection_dn,
"objectclass" : "nTDSConnection",
"enabledconnection" : "TRUE",
"options" : "65",
"fromServer" : ctx.dc_ntds_dn}
ctx.samdb.add(rec)
print "Adding %s" % ctx.topology_dn
rec = {
"dn" : ctx.topology_dn,
"objectclass" : "msDFSR-Member",
"msDFSR-ComputerReference" : ctx.acct_dn,
"serverReference" : ctx.ntds_dn}
ctx.samdb.add(rec)
print "Adding HOST SPNs to %s" % ctx.acct_dn
m = ldb.Message()
m.dn = ldb.Dn(ctx.samdb, ctx.acct_dn)
SPNs = [ "HOST/%s" % ctx.myname,
"HOST/%s" % ctx.dnshostname ]
m["servicePrincipalName"] = ldb.MessageElement(SPNs,
ldb.FLAG_MOD_ADD,
"servicePrincipalName")
ctx.samdb.modify(m)
print "Adding RestrictedKrbHost SPNs to %s" % ctx.acct_dn
m = ldb.Message()
m.dn = ldb.Dn(ctx.samdb, ctx.acct_dn)
SPNs = [ "RestrictedKrbHost/%s" % ctx.myname,
"RestrictedKrbHost/%s" % ctx.dnshostname ]
m["servicePrincipalName"] = ldb.MessageElement(SPNs,
ldb.FLAG_MOD_ADD,
"servicePrincipalName")
ctx.samdb.modify(m)
print "Setting account password for %s" % ctx.samname
ctx.samdb.setpassword("(&(objectClass=user)(sAMAccountName=%s))" % ctx.samname,
ctx.acct_pass,
force_change_at_next_login=False,
username=ctx.samname)
def join_provision(ctx):
'''provision the local SAM'''
print "Calling bare provision"
setup_dir = find_setup_dir()
logger = logging.getLogger("provision")
logger.addHandler(logging.StreamHandler(sys.stdout))
smbconf = lp.configfile
presult = provision(setup_dir, logger, system_session(), None,
smbconf=smbconf, targetdir=targetdir, samdb_fill=FILL_DRS,
realm=ctx.realm, rootdn=ctx.root_dn, domaindn=ctx.base_dn,
schemadn=ctx.schema_dn,
configdn=ctx.config_dn,
serverdn=ctx.server_dn, domain=ctx.domain_name,
hostname=ctx.myname, hostip="127.0.0.1", domainsid=ctx.domsid,
machinepass=ctx.acct_pass, serverrole="domain controller",
sitename=ctx.site)
print "Provision OK for domain DN %s" % presult.domaindn
ctx.local_samdb = presult.samdb
ctx.lp = presult.lp
ctx.paths = presult.paths
def join_replicate(ctx):
'''replicate the SAM'''
print "Starting replication"
ctx.local_samdb.transaction_start()
source_dsa_invocation_id = misc.GUID(ctx.samdb.get_invocation_id())
acct_creds = Credentials()
acct_creds.guess(ctx.lp)
acct_creds.set_kerberos_state(DONT_USE_KERBEROS)
acct_creds.set_username(ctx.samname)
acct_creds.set_password(ctx.acct_pass)
repl = drs_Replicate("ncacn_ip_tcp:%s[seal]" % ctx.server, ctx.lp, acct_creds, ctx.local_samdb)
repl.replicate(ctx.schema_dn, source_dsa_invocation_id, ctx.ntds_guid, schema=True)
repl.replicate(ctx.config_dn, source_dsa_invocation_id, ctx.ntds_guid)
repl.replicate(ctx.base_dn, source_dsa_invocation_id, ctx.ntds_guid)
repl.replicate(ctx.acct_dn, source_dsa_invocation_id, ctx.ntds_guid, exop=drsuapi.DRSUAPI_EXOP_REPL_SECRET)
repl.replicate(ctx.new_krbtgt_dn, source_dsa_invocation_id, ctx.ntds_guid, exop=drsuapi.DRSUAPI_EXOP_REPL_SECRET)
print "Committing SAM database"
ctx.local_samdb.transaction_commit()
def join_finalise(ctx):
'''finalise the join, mark us synchronised and setup secrets db'''
print "Setting isSynchronized"
m = ldb.Message()
m.dn = ldb.Dn(ctx.samdb, '@ROOTDSE')
m["isSynchronized"] = ldb.MessageElement("TRUE", ldb.FLAG_MOD_REPLACE, "isSynchronized")
ctx.samdb.modify(m)
secrets_ldb = Ldb(ctx.paths.secrets, session_info=system_session(), lp=ctx.lp)
print "Setting up secrets database"
secretsdb_self_join(secrets_ldb, domain=ctx.domain_name,
realm=ctx.realm,
dnsdomain=ctx.dnsdomain,
netbiosname=ctx.myname,
domainsid=security.dom_sid(ctx.domsid),
machinepass=ctx.acct_pass,
secure_channel_type=misc.SEC_CHAN_RODC)
# main join code
ctx = join_ctx()
ctx.creds = creds
ctx.lp = lp
ctx.site = site
ctx.netbios_name = netbios_name
ctx.targetdir = targetdir
ctx.creds.set_gensec_features(creds.get_gensec_features() | gensec.FEATURE_SEAL)
ctx.net = Net(creds=ctx.creds, lp=ctx.lp)
if server is not None:
ctx.server = server
else:
ctx.server = find_dc(ctx, domain)
ctx.samdb = SamDB(url="ldap://%s" % ctx.server,
session_info=system_session(),
credentials=ctx.creds, lp=ctx.lp)
ctx.myname = netbios_name
ctx.samname = "%s$" % ctx.myname
ctx.base_dn = str(ctx.samdb.get_default_basedn())
ctx.root_dn = str(ctx.samdb.get_root_basedn())
ctx.schema_dn = str(ctx.samdb.get_schema_basedn())
ctx.config_dn = str(ctx.samdb.get_config_basedn())
ctx.domsid = ctx.samdb.get_domain_sid()
ctx.domain_name = get_domain_name(ctx.samdb)
ctx.dc_ntds_dn = get_dsServiceName(ctx.samdb)
ctx.dc_dnsHostName = get_dnsHostName(ctx.samdb)
ctx.acct_pass = samba.generate_random_password(12, 32)
ctx.mysid = get_mysid(ctx.samdb)
# work out the DNs of all the objects we will be adding
ctx.admin_dn = "<SID=%s>" % ctx.mysid
ctx.krbtgt_dn = "CN=krbtgt_%s,CN=Users,%s" % (ctx.myname, ctx.base_dn)
ctx.server_dn = "CN=%s,CN=Servers,CN=%s,CN=Sites,%s" % (ctx.myname, ctx.site, ctx.config_dn)
ctx.ntds_dn = "CN=NTDS Settings,%s" % ctx.server_dn
ctx.connection_dn = "CN=RODC Connection (FRS),%s" % ctx.ntds_dn
ctx.topology_dn = "CN=%s,CN=Topology,CN=Domain System Volume,CN=DFSR-GlobalSettings,CN=System,%s" % (ctx.myname, ctx.base_dn)
# setup some defaults for accounts that should be replicated to this RODC
ctx.never_reveal_sid = [ "<SID=%s-%s>" % (ctx.domsid, security.DOMAIN_RID_RODC_DENY),
"<SID=%s>" % security.SID_BUILTIN_ADMINISTRATORS,
"<SID=%s>" % security.SID_BUILTIN_SERVER_OPERATORS,
"<SID=%s>" % security.SID_BUILTIN_BACKUP_OPERATORS,
"<SID=%s>" % security.SID_BUILTIN_ACCOUNT_OPERATORS ]
ctx.reveal_sid = "<SID=%s-%s>" % (ctx.domsid, security.DOMAIN_RID_RODC_ALLOW)
ctx.dnsdomain = ldb.Dn(ctx.samdb, ctx.base_dn).canonical_str().split('/')[0]
ctx.realm = ctx.dnsdomain
ctx.dnshostname = "%s.%s" % (ctx.myname, ctx.dnsdomain)
ctx.acct_dn = "CN=%s,OU=Domain Controllers,%s" % (ctx.myname, ctx.base_dn)
cleanup_old_join(ctx)
try:
join_add_objects(ctx)
join_provision(ctx)
join_replicate(ctx)
join_finalise(ctx)
except:
print "Join failed - cleaning up"
cleanup_old_join(ctx)
raise
print "Joined domain %s (SID %s) as an RODC" % (ctx.domain_name, ctx.domsid)