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b9c0b59034
don't rely on the netbios domain name being the first part of the realm Pair-Programmed-With: Andrew Bartlett <abartlet@samba.org>
346 lines
14 KiB
Python
346 lines
14 KiB
Python
#!/usr/bin/env python
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#
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# python join code
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# Copyright Andrew Tridgell 2010
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# Copyright Andrew Bartlett 2010
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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import samba.getopt as options
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from samba.auth import system_session
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from samba.samdb import SamDB
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from samba import gensec, Ldb
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import ldb, samba, sys
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from samba.ndr import ndr_pack, ndr_unpack, ndr_print
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from samba.dcerpc import security
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from samba.dcerpc import drsuapi, misc, netlogon
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from samba.credentials import Credentials, DONT_USE_KERBEROS
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from samba.provision import secretsdb_self_join, provision, FILL_DRS, find_setup_dir
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from samba.net import Net
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import logging
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from samba.drs_utils import drs_Replicate
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# this makes debugging easier
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samba.talloc_enable_null_tracking()
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class join_ctx:
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'''hold join context variables'''
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pass
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def join_rodc(server=None, creds=None, lp=None, site=None, netbios_name=None,
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targetdir=None, domain=None):
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"""join as a RODC"""
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if server is None:
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raise Exception("You must supply a server for a RODC join")
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def del_noerror(samdb, dn):
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try:
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samdb.delete(dn)
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print "Deleted %s" % dn
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except:
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pass
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def cleanup_old_join(ctx):
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'''remove any DNs from a previous join'''
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try:
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# find the krbtgt link
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res = ctx.samdb.search(base=ctx.acct_dn, scope=ldb.SCOPE_BASE, attrs=["msDS-krbTgtLink"])
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del_noerror(ctx.samdb, ctx.acct_dn)
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del_noerror(ctx.samdb, ctx.connection_dn)
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del_noerror(ctx.samdb, ctx.krbtgt_dn)
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del_noerror(ctx.samdb, ctx.ntds_dn)
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del_noerror(ctx.samdb, ctx.server_dn)
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del_noerror(ctx.samdb, ctx.topology_dn)
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ctx.new_krbtgt_dn = res[0]["msDS-Krbtgtlink"][0]
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del_noerror(ctx.samdb, ctx.new_krbtgt_dn)
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except:
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pass
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def get_dsServiceName(samdb):
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res = samdb.search(base="", scope=ldb.SCOPE_BASE, attrs=["dsServiceName"])
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return res[0]["dsServiceName"][0]
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def get_dnsHostName(samdb):
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res = samdb.search(base="", scope=ldb.SCOPE_BASE, attrs=["dnsHostName"])
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return res[0]["dnsHostName"][0]
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def get_domain_name(samdb):
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'''get netbios name of the domain from the partitions record'''
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partitions_dn = samdb.get_partitions_dn()
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res = samdb.search(base=partitions_dn, scope=ldb.SCOPE_ONELEVEL, attrs=["nETBIOSName"],
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expression='ncName=%s' % samdb.get_default_basedn())
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return res[0]["nETBIOSName"][0]
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def get_mysid(samdb):
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res = samdb.search(base="", scope=ldb.SCOPE_BASE, attrs=["tokenGroups"])
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binsid = res[0]["tokenGroups"][0]
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return samdb.schema_format_value("objectSID", binsid)
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def join_add_objects(ctx):
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'''add the various objects needed for the join'''
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print "Adding %s" % ctx.acct_dn
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rec = {
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"dn" : ctx.acct_dn,
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"objectClass": "computer",
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"displayname": ctx.samname,
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"samaccountname" : ctx.samname,
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"useraccountcontrol" : str(samba.dsdb.UF_WORKSTATION_TRUST_ACCOUNT |
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samba.dsdb.UF_TRUSTED_TO_AUTHENTICATE_FOR_DELEGATION |
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samba.dsdb.UF_PARTIAL_SECRETS_ACCOUNT),
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"managedby" : ctx.admin_dn,
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"dnshostname" : ctx.dnshostname,
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"msDS-NeverRevealGroup" : ctx.never_reveal_sid,
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"msDS-RevealOnDemandGroup" : ctx.reveal_sid}
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ctx.samdb.add(rec)
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print "Adding %s" % ctx.krbtgt_dn
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rec = {
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"dn" : ctx.krbtgt_dn,
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"objectclass" : "user",
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"useraccountcontrol" : str(samba.dsdb.UF_NORMAL_ACCOUNT |
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samba.dsdb.UF_ACCOUNTDISABLE),
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"showinadvancedviewonly" : "TRUE",
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"description" : "tricky account"}
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ctx.samdb.add(rec, ["rodc_join:1:1"])
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# now we need to search for the samAccountName attribute on the krbtgt DN,
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# as this will have been magically set to the krbtgt number
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res = ctx.samdb.search(base=ctx.krbtgt_dn, scope=ldb.SCOPE_BASE, attrs=["samAccountName"])
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ctx.krbtgt_name = res[0]["samAccountName"][0]
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print "Got krbtgt_name=%s" % ctx.krbtgt_name
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m = ldb.Message()
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m.dn = ldb.Dn(ctx.samdb, ctx.acct_dn)
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m["msDS-krbTgtLink"] = ldb.MessageElement(ctx.krbtgt_dn,
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ldb.FLAG_MOD_REPLACE, "msDS-krbTgtLink")
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ctx.samdb.modify(m)
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ctx.new_krbtgt_dn = "CN=%s,CN=Users,%s" % (ctx.krbtgt_name, ctx.base_dn)
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print "Renaming %s to %s" % (ctx.krbtgt_dn, ctx.new_krbtgt_dn)
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ctx.samdb.rename(ctx.krbtgt_dn, ctx.new_krbtgt_dn)
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print "Adding %s" % ctx.server_dn
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rec = {
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"dn": ctx.server_dn,
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"objectclass" : "server",
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"systemFlags" : str(samba.dsdb.SYSTEM_FLAG_CONFIG_ALLOW_RENAME |
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samba.dsdb.SYSTEM_FLAG_CONFIG_ALLOW_LIMITED_MOVE |
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samba.dsdb.SYSTEM_FLAG_DISALLOW_MOVE_ON_DELETE),
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"serverReference" : ctx.acct_dn,
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"dnsHostName" : ctx.dnshostname}
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ctx.samdb.add(rec)
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print "Adding %s" % ctx.ntds_dn
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rec = {
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"dn" : ctx.ntds_dn,
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"objectclass" : "nTDSDSA",
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"objectCategory" : "CN=NTDS-DSA-RO,%s" % ctx.schema_dn,
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"systemFlags" : str(samba.dsdb.SYSTEM_FLAG_DISALLOW_MOVE_ON_DELETE),
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"dMDLocation" : ctx.schema_dn,
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"options" : "37",
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"msDS-Behavior-Version" : "4",
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"msDS-HasDomainNCs" : ctx.base_dn,
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"msDS-HasFullReplicaNCs" : [ ctx.base_dn, ctx.config_dn, ctx.schema_dn ]}
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ctx.samdb.add(rec, ["rodc_join:1:1"])
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# find the GUID of our NTDS DN
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res = ctx.samdb.search(base=ctx.ntds_dn, scope=ldb.SCOPE_BASE, attrs=["objectGUID"])
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ctx.ntds_guid = misc.GUID(ctx.samdb.schema_format_value("objectGUID", res[0]["objectGUID"][0]))
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print "Adding %s" % ctx.connection_dn
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rec = {
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"dn" : ctx.connection_dn,
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"objectclass" : "nTDSConnection",
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"enabledconnection" : "TRUE",
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"options" : "65",
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"fromServer" : ctx.dc_ntds_dn}
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ctx.samdb.add(rec)
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print "Adding %s" % ctx.topology_dn
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rec = {
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"dn" : ctx.topology_dn,
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"objectclass" : "msDFSR-Member",
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"msDFSR-ComputerReference" : ctx.acct_dn,
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"serverReference" : ctx.ntds_dn}
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ctx.samdb.add(rec)
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print "Adding HOST SPNs to %s" % ctx.acct_dn
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m = ldb.Message()
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m.dn = ldb.Dn(ctx.samdb, ctx.acct_dn)
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SPNs = [ "HOST/%s" % ctx.myname,
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"HOST/%s" % ctx.dnshostname ]
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m["servicePrincipalName"] = ldb.MessageElement(SPNs,
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ldb.FLAG_MOD_ADD,
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"servicePrincipalName")
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ctx.samdb.modify(m)
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print "Adding RestrictedKrbHost SPNs to %s" % ctx.acct_dn
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m = ldb.Message()
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m.dn = ldb.Dn(ctx.samdb, ctx.acct_dn)
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SPNs = [ "RestrictedKrbHost/%s" % ctx.myname,
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"RestrictedKrbHost/%s" % ctx.dnshostname ]
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m["servicePrincipalName"] = ldb.MessageElement(SPNs,
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ldb.FLAG_MOD_ADD,
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"servicePrincipalName")
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ctx.samdb.modify(m)
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print "Setting account password for %s" % ctx.samname
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ctx.samdb.setpassword("(&(objectClass=user)(sAMAccountName=%s))" % ctx.samname,
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ctx.acct_pass,
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force_change_at_next_login=False,
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username=ctx.samname)
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def join_provision(ctx):
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'''provision the local SAM'''
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print "Calling bare provision"
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setup_dir = find_setup_dir()
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logger = logging.getLogger("provision")
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logger.addHandler(logging.StreamHandler(sys.stdout))
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smbconf = lp.configfile
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presult = provision(setup_dir, logger, system_session(), None,
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smbconf=smbconf, targetdir=targetdir, samdb_fill=FILL_DRS,
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realm=ctx.realm, rootdn=ctx.root_dn, domaindn=ctx.base_dn,
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schemadn=ctx.schema_dn,
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configdn=ctx.config_dn,
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serverdn=ctx.server_dn, domain=ctx.domain_name,
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hostname=ctx.myname, hostip="127.0.0.1", domainsid=ctx.domsid,
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machinepass=ctx.acct_pass, serverrole="domain controller",
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sitename=ctx.site)
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print "Provision OK for domain DN %s" % presult.domaindn
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ctx.local_samdb = presult.samdb
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ctx.lp = presult.lp
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ctx.paths = presult.paths
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def join_replicate(ctx):
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'''replicate the SAM'''
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print "Starting replication"
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ctx.local_samdb.transaction_start()
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source_dsa_invocation_id = misc.GUID(ctx.samdb.get_invocation_id())
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acct_creds = Credentials()
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acct_creds.guess(ctx.lp)
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acct_creds.set_kerberos_state(DONT_USE_KERBEROS)
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acct_creds.set_username(ctx.samname)
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acct_creds.set_password(ctx.acct_pass)
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repl = drs_Replicate("ncacn_ip_tcp:%s[seal]" % ctx.server, ctx.lp, acct_creds, ctx.local_samdb)
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repl.replicate(ctx.schema_dn, source_dsa_invocation_id, ctx.ntds_guid, schema=True)
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repl.replicate(ctx.config_dn, source_dsa_invocation_id, ctx.ntds_guid)
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repl.replicate(ctx.base_dn, source_dsa_invocation_id, ctx.ntds_guid)
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repl.replicate(ctx.acct_dn, source_dsa_invocation_id, ctx.ntds_guid, exop=drsuapi.DRSUAPI_EXOP_REPL_SECRET)
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repl.replicate(ctx.new_krbtgt_dn, source_dsa_invocation_id, ctx.ntds_guid, exop=drsuapi.DRSUAPI_EXOP_REPL_SECRET)
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print "Committing SAM database"
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ctx.local_samdb.transaction_commit()
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def join_finalise(ctx):
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'''finalise the join, mark us synchronised and setup secrets db'''
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print "Setting isSynchronized"
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m = ldb.Message()
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m.dn = ldb.Dn(ctx.samdb, '@ROOTDSE')
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m["isSynchronized"] = ldb.MessageElement("TRUE", ldb.FLAG_MOD_REPLACE, "isSynchronized")
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ctx.samdb.modify(m)
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secrets_ldb = Ldb(ctx.paths.secrets, session_info=system_session(), lp=ctx.lp)
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print "Setting up secrets database"
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secretsdb_self_join(secrets_ldb, domain=ctx.domain_name,
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realm=ctx.realm,
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dnsdomain=ctx.dnsdomain,
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netbiosname=ctx.myname,
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domainsid=security.dom_sid(ctx.domsid),
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machinepass=ctx.acct_pass,
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secure_channel_type=misc.SEC_CHAN_RODC)
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# main join code
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ctx = join_ctx()
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ctx.creds = creds
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ctx.lp = lp
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ctx.site = site
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ctx.netbios_name = netbios_name
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ctx.targetdir = targetdir
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ctx.server = server
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ctx.creds.set_gensec_features(creds.get_gensec_features() | gensec.FEATURE_SEAL)
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ctx.samdb = SamDB(url="ldap://%s" % ctx.server,
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session_info=system_session(),
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credentials=ctx.creds, lp=ctx.lp)
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ctx.net = Net(creds=ctx.creds, lp=ctx.lp)
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ctx.myname = netbios_name
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ctx.samname = "%s$" % ctx.myname
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ctx.base_dn = str(ctx.samdb.get_default_basedn())
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ctx.root_dn = str(ctx.samdb.get_root_basedn())
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ctx.schema_dn = str(ctx.samdb.get_schema_basedn())
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ctx.config_dn = str(ctx.samdb.get_config_basedn())
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ctx.domsid = ctx.samdb.get_domain_sid()
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ctx.domain_name = get_domain_name(ctx.samdb)
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ctx.dc_ntds_dn = get_dsServiceName(ctx.samdb)
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ctx.dc_dnsHostName = get_dnsHostName(ctx.samdb)
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ctx.acct_pass = samba.generate_random_password(12, 32)
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ctx.mysid = get_mysid(ctx.samdb)
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# work out the DNs of all the objects we will be adding
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ctx.admin_dn = "<SID=%s>" % ctx.mysid
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ctx.krbtgt_dn = "CN=krbtgt_%s,CN=Users,%s" % (ctx.myname, ctx.base_dn)
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ctx.server_dn = "CN=%s,CN=Servers,CN=%s,CN=Sites,%s" % (ctx.myname, ctx.site, ctx.config_dn)
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ctx.ntds_dn = "CN=NTDS Settings,%s" % ctx.server_dn
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ctx.connection_dn = "CN=RODC Connection (FRS),%s" % ctx.ntds_dn
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ctx.topology_dn = "CN=%s,CN=Topology,CN=Domain System Volume,CN=DFSR-GlobalSettings,CN=System,%s" % (ctx.myname, ctx.base_dn)
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# setup some defaults for accounts that should be replicated to this RODC
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ctx.never_reveal_sid = [ "<SID=%s-%s>" % (ctx.domsid, security.DOMAIN_RID_RODC_DENY),
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"<SID=%s>" % security.SID_BUILTIN_ADMINISTRATORS,
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"<SID=%s>" % security.SID_BUILTIN_SERVER_OPERATORS,
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"<SID=%s>" % security.SID_BUILTIN_BACKUP_OPERATORS,
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"<SID=%s>" % security.SID_BUILTIN_ACCOUNT_OPERATORS ]
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ctx.reveal_sid = "<SID=%s-%s>" % (ctx.domsid, security.DOMAIN_RID_RODC_ALLOW)
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ctx.dnsdomain = ldb.Dn(ctx.samdb, ctx.base_dn).canonical_str().split('/')[0]
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ctx.realm = ctx.dnsdomain
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ctx.dnshostname = "%s.%s" % (ctx.myname, ctx.dnsdomain)
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ctx.acct_dn = "CN=%s,OU=Domain Controllers,%s" % (ctx.myname, ctx.base_dn)
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cleanup_old_join(ctx)
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try:
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join_add_objects(ctx)
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join_provision(ctx)
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join_replicate(ctx)
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join_finalise(ctx)
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except:
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print "Join failed - cleaning up"
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cleanup_old_join(ctx)
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raise
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print "Joined domain %s (SID %s) as an RODC" % (ctx.domain_name, ctx.domsid)
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