c48b53fc134b838661277c654b0dd1ebc12bc690
[nivanova/samba-autobuild/.git] / source4 / scripting / python / samba / join.py
1 #!/usr/bin/env python
2 #
3 # python join code
4 # Copyright Andrew Tridgell 2010
5 # Copyright Andrew Bartlett 2010
6 #
7 # This program is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 3 of the License, or
10 # (at your option) any later version.
11 #
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 # GNU General Public License for more details.
16 #
17 # You should have received a copy of the GNU General Public License
18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
19 #
20
21 import samba.getopt as options
22 from samba.auth import system_session
23 from samba.samdb import SamDB
24 from samba import gensec, Ldb
25 import ldb, samba, sys
26 from samba.ndr import ndr_pack, ndr_unpack, ndr_print
27 from samba.dcerpc import security
28 from samba.dcerpc import drsuapi, misc, netlogon
29 from samba.credentials import Credentials, DONT_USE_KERBEROS
30 from samba.provision import secretsdb_self_join, provision, FILL_DRS, find_setup_dir
31 from samba.net import Net
32 import logging
33
34 # this makes debugging easier
35 samba.talloc_enable_null_tracking()
36
37 class join_ctx:
38     '''hold join context variables'''
39     pass
40
41 def join_rodc(server=None, creds=None, lp=None, site=None, netbios_name=None,
42               targetdir=None):
43     """join as a RODC"""
44
45     if server is None:
46         raise Exception("You must supply a server for a RODC join")
47
48     def del_noerror(samdb, dn):
49         try:
50             samdb.delete(dn)
51             print "Deleted %s" % dn
52         except:
53             pass
54
55     def cleanup_old_join(ctx):
56         '''remove any DNs from a previous join'''
57         try:
58             # find the krbtgt link
59             res = ctx.samdb.search(base=ctx.acct_dn, scope=ldb.SCOPE_BASE, attrs=["msDS-krbTgtLink"])
60             del_noerror(ctx.samdb, ctx.acct_dn)
61             del_noerror(ctx.samdb, ctx.connection_dn)
62             del_noerror(ctx.samdb, ctx.krbtgt_dn)
63             del_noerror(ctx.samdb, ctx.ntds_dn)
64             del_noerror(ctx.samdb, ctx.server_dn)
65             del_noerror(ctx.samdb, ctx.topology_dn)
66             ctx.new_krbtgt_dn = res[0]["msDS-Krbtgtlink"][0]
67             del_noerror(ctx.samdb, ctx.new_krbtgt_dn)
68         except:
69             pass
70
71     def get_dsServiceName(samdb):
72         res = samdb.search(base="", scope=ldb.SCOPE_BASE, attrs=["dsServiceName"])
73         return res[0]["dsServiceName"][0]
74
75     def get_dnsHostName(samdb):
76         res = samdb.search(base="", scope=ldb.SCOPE_BASE, attrs=["dnsHostName"])
77         return res[0]["dnsHostName"][0]
78
79     def get_mysid(samdb):
80         res = samdb.search(base="", scope=ldb.SCOPE_BASE, attrs=["tokenGroups"])
81         binsid = res[0]["tokenGroups"][0]
82         return samdb.schema_format_value("objectSID", binsid)
83
84     def get_domain_name(samdb):
85         # this should be done via CLDAP
86         res = samdb.search(base=samdb.get_default_basedn(), scope=ldb.SCOPE_BASE, attrs=["name"])
87         return res[0]["name"][0]
88
89     def do_DsBind(drs):
90         '''make a DsBind call, returning the binding handle'''
91         bind_info = drsuapi.DsBindInfoCtr()
92         bind_info.length = 28
93         bind_info.info = drsuapi.DsBindInfo28()
94         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_BASE;
95         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_ASYNC_REPLICATION;
96         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_REMOVEAPI;
97         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_MOVEREQ_V2;
98         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_GETCHG_COMPRESS;
99         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_DCINFO_V1;
100         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_RESTORE_USN_OPTIMIZATION;
101         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_KCC_EXECUTE;
102         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_ADDENTRY_V2;
103         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_LINKED_VALUE_REPLICATION;
104         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_DCINFO_V2;
105         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_INSTANCE_TYPE_NOT_REQ_ON_MOD;
106         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_CRYPTO_BIND;
107         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_GET_REPL_INFO;
108         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_STRONG_ENCRYPTION;
109         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_DCINFO_V01;
110         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_TRANSITIVE_MEMBERSHIP;
111         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_ADD_SID_HISTORY;
112         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_POST_BETA3;
113         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_GET_MEMBERSHIPS2;
114         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_GETCHGREQ_V6;
115         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_NONDOMAIN_NCS;
116         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_GETCHGREQ_V8;
117         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_GETCHGREPLY_V5;
118         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_GETCHGREPLY_V6;
119         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_ADDENTRYREPLY_V3;
120         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_GETCHGREPLY_V7;
121         bind_info.info.supported_extensions     |= drsuapi.DRSUAPI_SUPPORTED_EXTENSION_VERIFY_OBJECT;
122         (info, handle) = drs.DsBind(misc.GUID(drsuapi.DRSUAPI_DS_BIND_GUID), bind_info)
123         return handle
124
125     def get_rodc_partial_attribute_set(ctx):
126         '''get a list of attributes for RODC replication'''
127         partial_attribute_set = drsuapi.DsPartialAttributeSet()
128         partial_attribute_set.version = 1
129
130         ctx.attids = []
131
132         # the exact list of attids we send is quite critical. Note that
133         # we do ask for the secret attributes, but set set SPECIAL_SECRET_PROCESSING
134         # to zero them out
135         res = ctx.local_samdb.search(base=ctx.schema_dn, scope=ldb.SCOPE_SUBTREE,
136                                      expression="objectClass=attributeSchema",
137                                      attrs=["lDAPDisplayName", "systemFlags",
138                                             "searchFlags"])
139
140         for r in res:
141             ldap_display_name = r["lDAPDisplayName"][0]
142             if "systemFlags" in r:
143                 system_flags      = r["systemFlags"][0]
144                 if (int(system_flags) & (samba.dsdb.DS_FLAG_ATTR_NOT_REPLICATED |
145                                          samba.dsdb.DS_FLAG_ATTR_IS_CONSTRUCTED)):
146                     continue
147             search_flags = r["searchFlags"][0]
148             if (int(search_flags) & samba.dsdb.SEARCH_FLAG_RODC_ATTRIBUTE):
149                 continue
150             attid = ctx.local_samdb.get_attid_from_lDAPDisplayName(ldap_display_name)
151             ctx.attids.append(int(attid))
152
153         # the attids do need to be sorted, or windows doesn't return
154         # all the attributes we need
155         ctx.attids.sort()
156         partial_attribute_set.attids         = ctx.attids
157         partial_attribute_set.num_attids = len(ctx.attids)
158         return partial_attribute_set
159
160
161     def replicate_partition(ctx, dn, schema=False, exop=drsuapi.DRSUAPI_EXOP_NONE):
162         '''replicate a partition'''
163
164         # setup for a GetNCChanges call
165         req8 = drsuapi.DsGetNCChangesRequest8()
166
167         req8.destination_dsa_guid           = ctx.ntds_guid
168         req8.source_dsa_invocation_id       = misc.GUID(ctx.samdb.get_invocation_id())
169         req8.naming_context                 = drsuapi.DsReplicaObjectIdentifier()
170         req8.naming_context.dn              = dn.decode("utf-8")
171         req8.highwatermark                  = drsuapi.DsReplicaHighWaterMark()
172         req8.highwatermark.tmp_highest_usn  = 0
173         req8.highwatermark.reserved_usn     = 0
174         req8.highwatermark.highest_usn      = 0
175         req8.uptodateness_vector            = None
176         if exop == drsuapi.DRSUAPI_EXOP_REPL_SECRET:
177             req8.replica_flags              = 0
178         else:
179             req8.replica_flags              =  (drsuapi.DRSUAPI_DRS_INIT_SYNC |
180                                                 drsuapi.DRSUAPI_DRS_PER_SYNC |
181                                                 drsuapi.DRSUAPI_DRS_GET_ANC |
182                                                 drsuapi.DRSUAPI_DRS_NEVER_SYNCED |
183                                                 drsuapi.DRSUAPI_DRS_SPECIAL_SECRET_PROCESSING)
184         req8.max_object_count                = 402
185         req8.max_ndr_size                    = 402116
186         req8.extended_op                     = exop
187         req8.fsmo_info                       = 0
188         req8.partial_attribute_set           = None
189         req8.partial_attribute_set_ex        = None
190         req8.mapping_ctr.num_mappings        = 0
191         req8.mapping_ctr.mappings            = None
192
193         if not schema:
194             req8.partial_attribute_set = get_rodc_partial_attribute_set(ctx)
195
196         while True:
197             (level, ctr) = ctx.drs.DsGetNCChanges(ctx.drs_handle, 8, req8)
198             ctx.net.replicate_chunk(ctx.replication_state, level, ctr, schema=schema)
199             if ctr.more_data == 0:
200                 break
201             req8.highwatermark.tmp_highest_usn = ctr.new_highwatermark.tmp_highest_usn
202
203
204     def join_add_objects(ctx):
205         '''add the various objects needed for the join'''
206         print "Adding %s" % ctx.acct_dn
207         rec = {
208             "dn" : ctx.acct_dn,
209             "objectClass": "computer",
210             "displayname": ctx.samname,
211             "samaccountname" : ctx.samname,
212             "useraccountcontrol" : str(samba.dsdb.UF_WORKSTATION_TRUST_ACCOUNT |
213                                        samba.dsdb.UF_TRUSTED_TO_AUTHENTICATE_FOR_DELEGATION |
214                                        samba.dsdb.UF_PARTIAL_SECRETS_ACCOUNT),
215             "managedby" : ctx.admin_dn,
216             "dnshostname" : ctx.dnshostname,
217             "msDS-NeverRevealGroup" : ctx.never_reveal_sid,
218             "msDS-RevealOnDemandGroup" : ctx.reveal_sid}
219         ctx.samdb.add(rec)
220
221         print "Adding %s" % ctx.krbtgt_dn
222         rec = {
223             "dn" : ctx.krbtgt_dn,
224             "objectclass" : "user",
225             "useraccountcontrol" : str(samba.dsdb.UF_NORMAL_ACCOUNT |
226                                        samba.dsdb.UF_ACCOUNTDISABLE),
227             "showinadvancedviewonly" : "TRUE",
228             "description" : "tricky account"}
229         ctx.samdb.add(rec, ["rodc_join:1:1"])
230
231         # now we need to search for the samAccountName attribute on the krbtgt DN,
232         # as this will have been magically set to the krbtgt number
233         res = ctx.samdb.search(base=ctx.krbtgt_dn, scope=ldb.SCOPE_BASE, attrs=["samAccountName"])
234         ctx.krbtgt_name = res[0]["samAccountName"][0]
235
236         print "Got krbtgt_name=%s" % ctx.krbtgt_name
237
238         m = ldb.Message()
239         m.dn = ldb.Dn(ctx.samdb, ctx.acct_dn)
240         m["msDS-krbTgtLink"] = ldb.MessageElement(ctx.krbtgt_dn,
241                                                   ldb.FLAG_MOD_REPLACE, "msDS-krbTgtLink")
242         ctx.samdb.modify(m)
243
244         ctx.new_krbtgt_dn = "CN=%s,CN=Users,%s" % (ctx.krbtgt_name, ctx.base_dn)
245         print "Renaming %s to %s" % (ctx.krbtgt_dn, ctx.new_krbtgt_dn)
246         ctx.samdb.rename(ctx.krbtgt_dn, ctx.new_krbtgt_dn)
247
248         print "Adding %s" % ctx.server_dn
249         rec = {
250             "dn": ctx.server_dn,
251             "objectclass" : "server",
252             "systemFlags" : str(samba.dsdb.SYSTEM_FLAG_CONFIG_ALLOW_RENAME |
253                                 samba.dsdb.SYSTEM_FLAG_CONFIG_ALLOW_LIMITED_MOVE |
254                                 samba.dsdb.SYSTEM_FLAG_DISALLOW_MOVE_ON_DELETE),
255             "serverReference" : ctx.acct_dn,
256             "dnsHostName" : ctx.dnshostname}
257         ctx.samdb.add(rec)
258
259         print "Adding %s" % ctx.ntds_dn
260         rec = {
261             "dn" : ctx.ntds_dn,
262             "objectclass" : "nTDSDSA",
263             "objectCategory" : "CN=NTDS-DSA-RO,%s" % ctx.schema_dn,
264             "systemFlags" : str(samba.dsdb.SYSTEM_FLAG_DISALLOW_MOVE_ON_DELETE),
265             "dMDLocation" : ctx.schema_dn,
266             "options" : "37",
267             "msDS-Behavior-Version" : "4",
268             "msDS-HasDomainNCs" : ctx.base_dn,
269             "msDS-HasFullReplicaNCs" : [ ctx.base_dn, ctx.config_dn, ctx.schema_dn ]}
270         ctx.samdb.add(rec, ["rodc_join:1:1"])
271
272         # find the GUID of our NTDS DN
273         res = ctx.samdb.search(base=ctx.ntds_dn, scope=ldb.SCOPE_BASE, attrs=["objectGUID"])
274         ctx.ntds_guid = misc.GUID(ctx.samdb.schema_format_value("objectGUID", res[0]["objectGUID"][0]))
275
276         print "Adding %s" % ctx.connection_dn
277         rec = {
278             "dn" : ctx.connection_dn,
279             "objectclass" : "nTDSConnection",
280             "enabledconnection" : "TRUE",
281             "options" : "65",
282             "fromServer" : ctx.dc_ntds_dn}
283         ctx.samdb.add(rec)
284
285         print "Adding %s" % ctx.topology_dn
286         rec = {
287             "dn" : ctx.topology_dn,
288             "objectclass" : "msDFSR-Member",
289             "msDFSR-ComputerReference" : ctx.acct_dn,
290             "serverReference" : ctx.ntds_dn}
291         ctx.samdb.add(rec)
292
293         print "Adding HOST SPNs to %s" % ctx.acct_dn
294         m = ldb.Message()
295         m.dn = ldb.Dn(ctx.samdb, ctx.acct_dn)
296         SPNs = [ "HOST/%s" % ctx.myname,
297                  "HOST/%s" % ctx.dnshostname ]
298         m["servicePrincipalName"] = ldb.MessageElement(SPNs,
299                                                        ldb.FLAG_MOD_ADD,
300                                                        "servicePrincipalName")
301         ctx.samdb.modify(m)
302
303         print "Adding RestrictedKrbHost SPNs to %s" % ctx.acct_dn
304         m = ldb.Message()
305         m.dn = ldb.Dn(ctx.samdb, ctx.acct_dn)
306         SPNs = [ "RestrictedKrbHost/%s" % ctx.myname,
307                  "RestrictedKrbHost/%s" % ctx.dnshostname ]
308         m["servicePrincipalName"] = ldb.MessageElement(SPNs,
309                                                        ldb.FLAG_MOD_ADD,
310                                                        "servicePrincipalName")
311         ctx.samdb.modify(m)
312
313         print "Setting account password for %s" % ctx.samname
314         ctx.samdb.setpassword("(&(objectClass=user)(sAMAccountName=%s))" % ctx.samname,
315                               ctx.acct_pass,
316                               force_change_at_next_login=False,
317                               username=ctx.samname)
318
319
320     def join_drs_connect(ctx):
321         '''connect to DRSUAPI'''
322         print "Doing DsBind as %s" % ctx.samname
323         ctx.acct_creds = Credentials()
324         ctx.acct_creds.guess(ctx.lp)
325         ctx.acct_creds.set_kerberos_state(DONT_USE_KERBEROS)
326         ctx.acct_creds.set_username(ctx.samname)
327         ctx.acct_creds.set_password(ctx.acct_pass)
328
329         ctx.drs = drsuapi.drsuapi("ncacn_ip_tcp:%s[seal,print]" % ctx.server, ctx.lp, ctx.acct_creds)
330         ctx.drs_handle = do_DsBind(ctx.drs)
331
332
333     def join_provision(ctx):
334         '''provision the local SAM'''
335
336         print "Calling bare provision"
337
338         setup_dir = find_setup_dir()
339         logger = logging.getLogger("provision")
340         logger.addHandler(logging.StreamHandler(sys.stdout))
341         smbconf = lp.configfile
342
343         presult = provision(setup_dir, logger, system_session(), None,
344                             smbconf=smbconf, targetdir=targetdir, samdb_fill=FILL_DRS,
345                             realm=ctx.realm, rootdn=ctx.root_dn, domaindn=ctx.base_dn,
346                             schemadn=ctx.schema_dn,
347                             configdn=ctx.config_dn,
348                             serverdn=ctx.server_dn, domain=ctx.domain_name,
349                             hostname=ctx.myname, hostip="127.0.0.1", domainsid=ctx.domsid,
350                             machinepass=ctx.acct_pass, serverrole="domain controller",
351                             sitename=ctx.site)
352         print "Provision OK for domain DN %s" % presult.domaindn
353         ctx.local_samdb = presult.samdb
354         ctx.lp          = presult.lp
355         ctx.paths       = presult.paths
356
357
358     def join_replicate(ctx):
359         '''replicate the SAM'''
360
361         print "Starting replication"
362         ctx.local_samdb.transaction_start()
363
364         ctx.replication_state = ctx.net.replicate_init(ctx.local_samdb, ctx.lp, ctx.drs)
365
366         replicate_partition(ctx, ctx.schema_dn, schema=True)
367         replicate_partition(ctx, ctx.config_dn)
368         replicate_partition(ctx, ctx.base_dn)
369         replicate_partition(ctx, ctx.acct_dn, exop=drsuapi.DRSUAPI_EXOP_REPL_SECRET)
370         replicate_partition(ctx, ctx.new_krbtgt_dn, exop=drsuapi.DRSUAPI_EXOP_REPL_SECRET)
371
372         print "Committing SAM database"
373         ctx.local_samdb.transaction_commit()
374
375
376     def join_finalise(ctx):
377         '''finalise the join, mark us synchronised and setup secrets db'''
378
379         print "Setting isSynchronized"
380         m = ldb.Message()
381         m.dn = ldb.Dn(ctx.samdb, '@ROOTDSE')
382         m["isSynchronized"] = ldb.MessageElement("TRUE", ldb.FLAG_MOD_REPLACE, "isSynchronized")
383         ctx.samdb.modify(m)
384
385         secrets_ldb = Ldb(ctx.paths.secrets, session_info=system_session(), lp=ctx.lp)
386
387         print "Setting up secrets database"
388         secretsdb_self_join(secrets_ldb, domain=ctx.domain_name,
389                             realm=ctx.realm,
390                             dnsdomain=ctx.dnsdomain,
391                             netbiosname=ctx.myname,
392                             domainsid=security.dom_sid(ctx.domsid),
393                             machinepass=ctx.acct_pass,
394                             secure_channel_type=misc.SEC_CHAN_RODC)
395
396
397
398     # main join code
399     ctx = join_ctx()
400     ctx.creds = creds
401     ctx.lp = lp
402     ctx.site = site
403     ctx.netbios_name = netbios_name
404     ctx.targetdir = targetdir
405     ctx.server = server
406
407     ctx.creds.set_gensec_features(creds.get_gensec_features() | gensec.FEATURE_SEAL)
408
409     ctx.samdb = SamDB(url="ldap://%s" % ctx.server,
410                       session_info=system_session(),
411                       credentials=ctx.creds, lp=ctx.lp)
412     ctx.net = Net(creds=ctx.creds, lp=ctx.lp)
413
414     ctx.myname = netbios_name
415     ctx.samname = "%s$" % ctx.myname
416     ctx.base_dn = str(ctx.samdb.get_default_basedn())
417     ctx.root_dn = str(ctx.samdb.get_root_basedn())
418     ctx.schema_dn = str(ctx.samdb.get_schema_basedn())
419     ctx.config_dn = str(ctx.samdb.get_config_basedn())
420     ctx.domsid = ctx.samdb.get_domain_sid()
421     ctx.domain_name = get_domain_name(ctx.samdb)
422
423     ctx.dc_ntds_dn = get_dsServiceName(ctx.samdb)
424     ctx.dc_dnsHostName = get_dnsHostName(ctx.samdb)
425     ctx.acct_pass = samba.generate_random_password(12, 32)
426     ctx.mysid = get_mysid(ctx.samdb)
427
428     # work out the DNs of all the objects we will be adding
429     ctx.admin_dn = "<SID=%s>" % ctx.mysid
430     ctx.krbtgt_dn = "CN=krbtgt_%s,CN=Users,%s" % (ctx.myname, ctx.base_dn)
431     ctx.server_dn = "CN=%s,CN=Servers,CN=%s,CN=Sites,%s" % (ctx.myname, ctx.site, ctx.config_dn)
432     ctx.ntds_dn = "CN=NTDS Settings,%s" % ctx.server_dn
433     ctx.connection_dn = "CN=RODC Connection (FRS),%s" % ctx.ntds_dn
434     ctx.topology_dn = "CN=%s,CN=Topology,CN=Domain System Volume,CN=DFSR-GlobalSettings,CN=System,%s" % (ctx.myname, ctx.base_dn)
435
436     # setup some defaults for accounts that should be replicated to this RODC
437     ctx.never_reveal_sid = [ "<SID=%s-%s>" % (ctx.domsid, security.DOMAIN_RID_RODC_DENY),
438                              "<SID=%s>" % security.SID_BUILTIN_ADMINISTRATORS,
439                              "<SID=%s>" % security.SID_BUILTIN_SERVER_OPERATORS,
440                              "<SID=%s>" % security.SID_BUILTIN_BACKUP_OPERATORS,
441                              "<SID=%s>" % security.SID_BUILTIN_ACCOUNT_OPERATORS ]
442     ctx.reveal_sid = "<SID=%s-%s>" % (ctx.domsid, security.DOMAIN_RID_RODC_ALLOW)
443
444     ctx.dnsdomain = ldb.Dn(ctx.samdb, ctx.base_dn).canonical_str().split('/')[0]
445     ctx.realm = ctx.dnsdomain
446     ctx.dnshostname = "%s.%s" % (ctx.myname, ctx.dnsdomain)
447
448     ctx.acct_dn = "CN=%s,OU=Domain Controllers,%s" % (ctx.myname, ctx.base_dn)
449
450     cleanup_old_join(ctx)
451     try:
452         join_add_objects(ctx)
453         join_drs_connect(ctx)
454         join_provision(ctx)
455         join_replicate(ctx)
456         join_finalise(ctx)
457     except:
458         print "Join failed - cleaning up"
459         cleanup_old_join(ctx)
460         raise
461
462     print "Joined domain %s (SID %s) as an RODC" % (ctx.domain_name, ctx.domsid)
463