1 # Unix SMB/CIFS implementation.
2 # backend code for provisioning DNS for a Samba4 server
4 # Copyright (C) Kai Blin <kai@samba.org> 2011
5 # Copyright (C) Amitay Isaacs <amitay@gmail.com> 2011
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.
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.
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/>.
21 """DNS-related provisioning"""
28 from base64 import b64encode
30 from samba.ndr import ndr_pack, ndr_unpack
31 from samba import setup_file
32 from samba.dcerpc import dnsp, misc, security
33 from samba.dsdb import (
34 DS_DOMAIN_FUNCTION_2000,
35 DS_DOMAIN_FUNCTION_2003,
36 DS_DOMAIN_FUNCTION_2008_R2
38 from samba.provision.descriptor import (
39 get_domain_descriptor,
40 get_domain_delete_protected1_descriptor,
41 get_domain_delete_protected2_descriptor,
42 get_dns_partition_descriptor,
43 get_dns_forest_microsoft_dns_descriptor,
44 get_dns_domain_microsoft_dns_descriptor
46 from samba.provision.common import (
54 def get_domainguid(samdb, domaindn):
55 res = samdb.search(base=domaindn, scope=ldb.SCOPE_BASE, attrs=["objectGUID"])
56 domainguid = str(ndr_unpack(misc.GUID, res[0]["objectGUID"][0]))
60 def get_dnsadmins_sid(samdb, domaindn):
61 res = samdb.search(base="CN=DnsAdmins,CN=Users,%s" % domaindn, scope=ldb.SCOPE_BASE,
63 dnsadmins_sid = ndr_unpack(security.dom_sid, res[0]["objectSid"][0])
67 class ARecord(dnsp.DnssrvRpcRecord):
69 def __init__(self, ip_addr, serial=1, ttl=900, rank=dnsp.DNS_RANK_ZONE):
70 super(ARecord, self).__init__()
71 self.wType = dnsp.DNS_TYPE_A
73 self.dwSerial = serial
74 self.dwTtlSeconds = ttl
78 class AAAARecord(dnsp.DnssrvRpcRecord):
80 def __init__(self, ip6_addr, serial=1, ttl=900, rank=dnsp.DNS_RANK_ZONE):
81 super(AAAARecord, self).__init__()
82 self.wType = dnsp.DNS_TYPE_AAAA
84 self.dwSerial = serial
85 self.dwTtlSeconds = ttl
89 class CNameRecord(dnsp.DnssrvRpcRecord):
91 def __init__(self, cname, serial=1, ttl=900, rank=dnsp.DNS_RANK_ZONE):
92 super(CNameRecord, self).__init__()
93 self.wType = dnsp.DNS_TYPE_CNAME
95 self.dwSerial = serial
96 self.dwTtlSeconds = ttl
100 class NSRecord(dnsp.DnssrvRpcRecord):
102 def __init__(self, dns_server, serial=1, ttl=900, rank=dnsp.DNS_RANK_ZONE):
103 super(NSRecord, self).__init__()
104 self.wType = dnsp.DNS_TYPE_NS
106 self.dwSerial = serial
107 self.dwTtlSeconds = ttl
108 self.data = dns_server
111 class SOARecord(dnsp.DnssrvRpcRecord):
113 def __init__(self, mname, rname, serial=1, refresh=900, retry=600,
114 expire=86400, minimum=3600, ttl=3600, rank=dnsp.DNS_RANK_ZONE):
115 super(SOARecord, self).__init__()
116 self.wType = dnsp.DNS_TYPE_SOA
118 self.dwSerial = serial
119 self.dwTtlSeconds = ttl
122 soa.refresh = refresh
130 class SRVRecord(dnsp.DnssrvRpcRecord):
132 def __init__(self, target, port, priority=0, weight=100, serial=1, ttl=900,
133 rank=dnsp.DNS_RANK_ZONE):
134 super(SRVRecord, self).__init__()
135 self.wType = dnsp.DNS_TYPE_SRV
137 self.dwSerial = serial
138 self.dwTtlSeconds = ttl
140 srv.nameTarget = target
142 srv.wPriority = priority
147 class TXTRecord(dnsp.DnssrvRpcRecord):
149 def __init__(self, slist, serial=1, ttl=900, rank=dnsp.DNS_RANK_ZONE):
150 super(TXTRecord, self).__init__()
151 self.wType = dnsp.DNS_TYPE_TXT
153 self.dwSerial = serial
154 self.dwTtlSeconds = ttl
155 stringlist = dnsp.string_list()
156 stringlist.count = len(slist)
157 stringlist.str = slist
158 self.data = stringlist
161 class TypeProperty(dnsp.DnsProperty):
163 def __init__(self, zone_type=dnsp.DNS_ZONE_TYPE_PRIMARY):
164 super(TypeProperty, self).__init__()
167 self.id = dnsp.DSPROPERTY_ZONE_TYPE
168 self.data = zone_type
171 class AllowUpdateProperty(dnsp.DnsProperty):
173 def __init__(self, allow_update=dnsp.DNS_ZONE_UPDATE_SECURE):
174 super(AllowUpdateProperty, self).__init__()
177 self.id = dnsp.DSPROPERTY_ZONE_ALLOW_UPDATE
178 self.data = allow_update
181 class SecureTimeProperty(dnsp.DnsProperty):
183 def __init__(self, secure_time=0):
184 super(SecureTimeProperty, self).__init__()
187 self.id = dnsp.DSPROPERTY_ZONE_SECURE_TIME
188 self.data = secure_time
191 class NorefreshIntervalProperty(dnsp.DnsProperty):
193 def __init__(self, norefresh_interval=0):
194 super(NorefreshIntervalProperty, self).__init__()
197 self.id = dnsp.DSPROPERTY_ZONE_NOREFRESH_INTERVAL
198 self.data = norefresh_interval
201 class RefreshIntervalProperty(dnsp.DnsProperty):
203 def __init__(self, refresh_interval=0):
204 super(RefreshIntervalProperty, self).__init__()
207 self.id = dnsp.DSPROPERTY_ZONE_REFRESH_INTERVAL
208 self.data = refresh_interval
211 class AgingStateProperty(dnsp.DnsProperty):
213 def __init__(self, aging_enabled=0):
214 super(AgingStateProperty, self).__init__()
217 self.id = dnsp.DSPROPERTY_ZONE_AGING_STATE
218 self.data = aging_enabled
221 class AgingEnabledTimeProperty(dnsp.DnsProperty):
223 def __init__(self, next_cycle_hours=0):
224 super(AgingEnabledTimeProperty, self).__init__()
227 self.id = dnsp.DSPROPERTY_ZONE_AGING_ENABLED_TIME
228 self.data = next_cycle_hours
231 def setup_dns_partitions(samdb, domainsid, domaindn, forestdn, configdn,
233 domainzone_dn = "DC=DomainDnsZones,%s" % domaindn
234 forestzone_dn = "DC=ForestDnsZones,%s" % forestdn
235 descriptor = get_dns_partition_descriptor(domainsid)
236 setup_add_ldif(samdb, setup_path("provision_dnszones_partitions.ldif"), {
237 "DOMAINZONE_DN": domainzone_dn,
238 "FORESTZONE_DN": forestzone_dn,
239 "SECDESC" : b64encode(descriptor)
242 domainzone_guid = get_domainguid(samdb, domainzone_dn)
243 forestzone_guid = get_domainguid(samdb, forestzone_dn)
245 domainzone_guid = str(uuid.uuid4())
246 forestzone_guid = str(uuid.uuid4())
248 domainzone_dns = ldb.Dn(samdb, domainzone_dn).canonical_ex_str().strip()
249 forestzone_dns = ldb.Dn(samdb, forestzone_dn).canonical_ex_str().strip()
251 protected1_desc = get_domain_delete_protected1_descriptor(domainsid)
252 protected2_desc = get_domain_delete_protected2_descriptor(domainsid)
253 setup_add_ldif(samdb, setup_path("provision_dnszones_add.ldif"), {
254 "DOMAINZONE_DN": domainzone_dn,
255 "FORESTZONE_DN": forestzone_dn,
256 "DOMAINZONE_GUID": domainzone_guid,
257 "FORESTZONE_GUID": forestzone_guid,
258 "DOMAINZONE_DNS": domainzone_dns,
259 "FORESTZONE_DNS": forestzone_dns,
260 "CONFIGDN": configdn,
261 "SERVERDN": serverdn,
262 "LOSTANDFOUND_DESCRIPTOR": b64encode(protected2_desc),
263 "INFRASTRUCTURE_DESCRIPTOR": b64encode(protected1_desc),
266 setup_modify_ldif(samdb, setup_path("provision_dnszones_modify.ldif"), {
267 "CONFIGDN": configdn,
268 "SERVERDN": serverdn,
269 "DOMAINZONE_DN": domainzone_dn,
270 "FORESTZONE_DN": forestzone_dn,
274 def add_dns_accounts(samdb, domaindn):
275 setup_add_ldif(samdb, setup_path("provision_dns_accounts_add.ldif"), {
276 "DOMAINDN": domaindn,
280 def add_dns_container(samdb, domaindn, prefix, domain_sid, dnsadmins_sid, forest=False):
281 name_map = {'DnsAdmins': str(dnsadmins_sid)}
283 sd_val = get_dns_forest_microsoft_dns_descriptor(domain_sid,
286 sd_val = get_dns_domain_microsoft_dns_descriptor(domain_sid,
288 # CN=MicrosoftDNS,<PREFIX>,<DOMAINDN>
289 msg = ldb.Message(ldb.Dn(samdb, "CN=MicrosoftDNS,%s,%s" % (prefix, domaindn)))
290 msg["objectClass"] = ["top", "container"]
291 msg["nTSecurityDescriptor"] = ldb.MessageElement(sd_val, ldb.FLAG_MOD_ADD,
292 "nTSecurityDescriptor")
296 def add_rootservers(samdb, domaindn, prefix):
298 rootservers["a.root-servers.net"] = "198.41.0.4"
299 rootservers["b.root-servers.net"] = "192.228.79.201"
300 rootservers["c.root-servers.net"] = "192.33.4.12"
301 rootservers["d.root-servers.net"] = "128.8.10.90"
302 rootservers["e.root-servers.net"] = "192.203.230.10"
303 rootservers["f.root-servers.net"] = "192.5.5.241"
304 rootservers["g.root-servers.net"] = "192.112.36.4"
305 rootservers["h.root-servers.net"] = "128.63.2.53"
306 rootservers["i.root-servers.net"] = "192.36.148.17"
307 rootservers["j.root-servers.net"] = "192.58.128.30"
308 rootservers["k.root-servers.net"] = "193.0.14.129"
309 rootservers["l.root-servers.net"] = "199.7.83.42"
310 rootservers["m.root-servers.net"] = "202.12.27.33"
313 rootservers_v6["a.root-servers.net"] = "2001:503:ba3e::2:30"
314 rootservers_v6["f.root-servers.net"] = "2001:500:2f::f"
315 rootservers_v6["h.root-servers.net"] = "2001:500:1::803f:235"
316 rootservers_v6["j.root-servers.net"] = "2001:503:c27::2:30"
317 rootservers_v6["k.root-servers.net"] = "2001:7fd::1"
318 rootservers_v6["m.root-servers.net"] = "2001:dc3::35"
320 container_dn = "DC=RootDNSServers,CN=MicrosoftDNS,%s,%s" % (prefix, domaindn)
322 # Add DC=RootDNSServers,CN=MicrosoftDNS,<PREFIX>,<DOMAINDN>
323 msg = ldb.Message(ldb.Dn(samdb, container_dn))
325 props.append(ndr_pack(TypeProperty(zone_type=dnsp.DNS_ZONE_TYPE_CACHE)))
326 props.append(ndr_pack(AllowUpdateProperty(allow_update=dnsp.DNS_ZONE_UPDATE_OFF)))
327 props.append(ndr_pack(SecureTimeProperty()))
328 props.append(ndr_pack(NorefreshIntervalProperty()))
329 props.append(ndr_pack(RefreshIntervalProperty()))
330 props.append(ndr_pack(AgingStateProperty()))
331 props.append(ndr_pack(AgingEnabledTimeProperty()))
332 msg["objectClass"] = ["top", "dnsZone"]
333 msg["cn"] = ldb.MessageElement("Zone", ldb.FLAG_MOD_ADD, "cn")
334 msg["dNSProperty"] = ldb.MessageElement(props, ldb.FLAG_MOD_ADD, "dNSProperty")
337 # Add DC=@,DC=RootDNSServers,CN=MicrosoftDNS,<PREFIX>,<DOMAINDN>
339 for rserver in rootservers:
340 record.append(ndr_pack(NSRecord(rserver, serial=0, ttl=0, rank=dnsp.DNS_RANK_ROOT_HINT)))
342 msg = ldb.Message(ldb.Dn(samdb, "DC=@,%s" % container_dn))
343 msg["objectClass"] = ["top", "dnsNode"]
344 msg["dnsRecord"] = ldb.MessageElement(record, ldb.FLAG_MOD_ADD, "dnsRecord")
347 # Add DC=<rootserver>,DC=RootDNSServers,CN=MicrosoftDNS,<PREFIX>,<DOMAINDN>
348 for rserver in rootservers:
349 record = [ndr_pack(ARecord(rootservers[rserver], serial=0, ttl=0, rank=dnsp.DNS_RANK_ROOT_HINT))]
350 # Add AAAA record as well (How does W2K* add IPv6 records?)
351 #if rserver in rootservers_v6:
352 # record.append(ndr_pack(AAAARecord(rootservers_v6[rserver], serial=0, ttl=0)))
353 msg = ldb.Message(ldb.Dn(samdb, "DC=%s,%s" % (rserver, container_dn)))
354 msg["objectClass"] = ["top", "dnsNode"]
355 msg["dnsRecord"] = ldb.MessageElement(record, ldb.FLAG_MOD_ADD, "dnsRecord")
358 def add_at_record(samdb, container_dn, prefix, hostname, dnsdomain, hostip, hostip6):
360 fqdn_hostname = "%s.%s" % (hostname, dnsdomain)
365 at_soa_record = SOARecord(fqdn_hostname, "hostmaster.%s" % dnsdomain)
366 at_records.append(ndr_pack(at_soa_record))
369 at_ns_record = NSRecord(fqdn_hostname)
370 at_records.append(ndr_pack(at_ns_record))
372 if hostip is not None:
374 at_a_record = ARecord(hostip)
375 at_records.append(ndr_pack(at_a_record))
377 if hostip6 is not None:
379 at_aaaa_record = AAAARecord(hostip6)
380 at_records.append(ndr_pack(at_aaaa_record))
382 msg = ldb.Message(ldb.Dn(samdb, "DC=@,%s" % container_dn))
383 msg["objectClass"] = ["top", "dnsNode"]
384 msg["dnsRecord"] = ldb.MessageElement(at_records, ldb.FLAG_MOD_ADD, "dnsRecord")
388 def add_srv_record(samdb, container_dn, prefix, host, port):
389 srv_record = SRVRecord(host, port)
390 msg = ldb.Message(ldb.Dn(samdb, "%s,%s" % (prefix, container_dn)))
391 msg["objectClass"] = ["top", "dnsNode"]
392 msg["dnsRecord"] = ldb.MessageElement(ndr_pack(srv_record), ldb.FLAG_MOD_ADD, "dnsRecord")
396 def add_ns_record(samdb, container_dn, prefix, host):
397 ns_record = NSRecord(host)
398 msg = ldb.Message(ldb.Dn(samdb, "%s,%s" % (prefix, container_dn)))
399 msg["objectClass"] = ["top", "dnsNode"]
400 msg["dnsRecord"] = ldb.MessageElement(ndr_pack(ns_record), ldb.FLAG_MOD_ADD, "dnsRecord")
404 def add_ns_glue_record(samdb, container_dn, prefix, host):
405 ns_record = NSRecord(host, rank=dnsp.DNS_RANK_NS_GLUE)
406 msg = ldb.Message(ldb.Dn(samdb, "%s,%s" % (prefix, container_dn)))
407 msg["objectClass"] = ["top", "dnsNode"]
408 msg["dnsRecord"] = ldb.MessageElement(ndr_pack(ns_record), ldb.FLAG_MOD_ADD, "dnsRecord")
412 def add_cname_record(samdb, container_dn, prefix, host):
413 cname_record = CNameRecord(host)
414 msg = ldb.Message(ldb.Dn(samdb, "%s,%s" % (prefix, container_dn)))
415 msg["objectClass"] = ["top", "dnsNode"]
416 msg["dnsRecord"] = ldb.MessageElement(ndr_pack(cname_record), ldb.FLAG_MOD_ADD, "dnsRecord")
420 def add_host_record(samdb, container_dn, prefix, hostip, hostip6):
423 a_record = ARecord(hostip)
424 host_records.append(ndr_pack(a_record))
426 aaaa_record = AAAARecord(hostip6)
427 host_records.append(ndr_pack(aaaa_record))
429 msg = ldb.Message(ldb.Dn(samdb, "%s,%s" % (prefix, container_dn)))
430 msg["objectClass"] = ["top", "dnsNode"]
431 msg["dnsRecord"] = ldb.MessageElement(host_records, ldb.FLAG_MOD_ADD, "dnsRecord")
435 def add_domain_record(samdb, domaindn, prefix, dnsdomain, domainsid, dnsadmins_sid):
436 # DC=<DNSDOMAIN>,CN=MicrosoftDNS,<PREFIX>,<DOMAINDN>
437 sddl = "O:SYG:BAD:AI" \
438 "(A;;RPWPCRCCDCLCLORCWOWDSDDTSW;;;DA)" \
440 "(A;;RPLCLORC;;;WD)" \
441 "(A;;RPWPCRCCDCLCLORCWOWDSDDTSW;;;SY)" \
442 "(A;CI;RPWPCRCCDCLCRCWOWDSDDTSW;;;ED)" \
443 "(A;CIID;RPWPCRCCDCLCRCWOWDSDDTSW;;;%s)" \
444 "(A;CIID;RPWPCRCCDCLCRCWOWDSDDTSW;;;ED)" \
445 "(OA;CIID;RPWPCR;91e647de-d96f-4b70-9557-d63ff4f3ccd8;;PS)" \
446 "(A;CIID;RPWPCRCCDCLCLORCWOWDSDDTSW;;;EA)" \
448 "(A;CIID;RPWPCRCCLCLORCWOWDSDSW;;;BA)" \
449 "S:AI" % dnsadmins_sid
450 sec = security.descriptor.from_sddl(sddl, domainsid)
452 props.append(ndr_pack(TypeProperty()))
453 props.append(ndr_pack(AllowUpdateProperty()))
454 props.append(ndr_pack(SecureTimeProperty()))
455 props.append(ndr_pack(NorefreshIntervalProperty(norefresh_interval=168)))
456 props.append(ndr_pack(RefreshIntervalProperty(refresh_interval=168)))
457 props.append(ndr_pack(AgingStateProperty()))
458 props.append(ndr_pack(AgingEnabledTimeProperty()))
459 msg = ldb.Message(ldb.Dn(samdb, "DC=%s,CN=MicrosoftDNS,%s,%s" % (dnsdomain, prefix, domaindn)))
460 msg["objectClass"] = ["top", "dnsZone"]
461 msg["ntSecurityDescriptor"] = ldb.MessageElement(ndr_pack(sec), ldb.FLAG_MOD_ADD,
462 "nTSecurityDescriptor")
463 msg["dNSProperty"] = ldb.MessageElement(props, ldb.FLAG_MOD_ADD, "dNSProperty")
467 def add_msdcs_record(samdb, forestdn, prefix, dnsforest):
468 # DC=_msdcs.<DNSFOREST>,CN=MicrosoftDNS,<PREFIX>,<FORESTDN>
469 msg = ldb.Message(ldb.Dn(samdb, "DC=_msdcs.%s,CN=MicrosoftDNS,%s,%s" %
470 (dnsforest, prefix, forestdn)))
471 msg["objectClass"] = ["top", "dnsZone"]
475 def add_dc_domain_records(samdb, domaindn, prefix, site, dnsdomain, hostname,
478 fqdn_hostname = "%s.%s" % (hostname, dnsdomain)
480 # Set up domain container - DC=<DNSDOMAIN>,CN=MicrosoftDNS,<PREFIX>,<DOMAINDN>
481 domain_container_dn = ldb.Dn(samdb, "DC=%s,CN=MicrosoftDNS,%s,%s" %
482 (dnsdomain, prefix, domaindn))
485 add_at_record(samdb, domain_container_dn, "DC=@", hostname, dnsdomain,
488 # DC=<HOSTNAME> record
489 add_host_record(samdb, domain_container_dn, "DC=%s" % hostname, hostip,
492 # DC=_kerberos._tcp record
493 add_srv_record(samdb, domain_container_dn, "DC=_kerberos._tcp",
496 # DC=_kerberos._tcp.<SITENAME>._sites record
497 add_srv_record(samdb, domain_container_dn, "DC=_kerberos._tcp.%s._sites" %
498 site, fqdn_hostname, 88)
500 # DC=_kerberos._udp record
501 add_srv_record(samdb, domain_container_dn, "DC=_kerberos._udp",
504 # DC=_kpasswd._tcp record
505 add_srv_record(samdb, domain_container_dn, "DC=_kpasswd._tcp",
508 # DC=_kpasswd._udp record
509 add_srv_record(samdb, domain_container_dn, "DC=_kpasswd._udp",
512 # DC=_ldap._tcp record
513 add_srv_record(samdb, domain_container_dn, "DC=_ldap._tcp", fqdn_hostname,
516 # DC=_ldap._tcp.<SITENAME>._sites record
517 add_srv_record(samdb, domain_container_dn, "DC=_ldap._tcp.%s._sites" %
518 site, fqdn_hostname, 389)
520 # FIXME: The number of SRV records depend on the various roles this DC has.
521 # _gc and _msdcs records are added if the we are the forest dc and not subdomain dc
523 # Assumption: current DC is GC and add all the entries
526 add_srv_record(samdb, domain_container_dn, "DC=_gc._tcp", fqdn_hostname,
529 # DC=_gc._tcp.<SITENAME>,_sites record
530 add_srv_record(samdb, domain_container_dn, "DC=_gc._tcp.%s._sites" % site,
534 add_ns_glue_record(samdb, domain_container_dn, "DC=_msdcs", fqdn_hostname)
536 # FIXME: Following entries are added only if DomainDnsZones and ForestDnsZones partitions
539 # Assumption: Additional entries won't hurt on os_level = 2000
541 # DC=_ldap._tcp.<SITENAME>._sites.DomainDnsZones
542 add_srv_record(samdb, domain_container_dn,
543 "DC=_ldap._tcp.%s._sites.DomainDnsZones" % site, fqdn_hostname,
546 # DC=_ldap._tcp.<SITENAME>._sites.ForestDnsZones
547 add_srv_record(samdb, domain_container_dn,
548 "DC=_ldap._tcp.%s._sites.ForestDnsZones" % site, fqdn_hostname,
551 # DC=_ldap._tcp.DomainDnsZones
552 add_srv_record(samdb, domain_container_dn, "DC=_ldap._tcp.DomainDnsZones",
555 # DC=_ldap._tcp.ForestDnsZones
556 add_srv_record(samdb, domain_container_dn, "DC=_ldap._tcp.ForestDnsZones",
560 add_host_record(samdb, domain_container_dn, "DC=DomainDnsZones", hostip,
564 add_host_record(samdb, domain_container_dn, "DC=ForestDnsZones", hostip,
568 def add_dc_msdcs_records(samdb, forestdn, prefix, site, dnsforest, hostname,
569 hostip, hostip6, domainguid, ntdsguid):
571 fqdn_hostname = "%s.%s" % (hostname, dnsforest)
573 # Set up forest container - DC=<DNSDOMAIN>,CN=MicrosoftDNS,<PREFIX>,<DOMAINDN>
574 forest_container_dn = ldb.Dn(samdb, "DC=_msdcs.%s,CN=MicrosoftDNS,%s,%s" %
575 (dnsforest, prefix, forestdn))
578 add_at_record(samdb, forest_container_dn, "DC=@", hostname, dnsforest,
581 # DC=_kerberos._tcp.dc record
582 add_srv_record(samdb, forest_container_dn, "DC=_kerberos._tcp.dc",
585 # DC=_kerberos._tcp.<SITENAME>._sites.dc record
586 add_srv_record(samdb, forest_container_dn,
587 "DC=_kerberos._tcp.%s._sites.dc" % site, fqdn_hostname, 88)
589 # DC=_ldap._tcp.dc record
590 add_srv_record(samdb, forest_container_dn, "DC=_ldap._tcp.dc",
593 # DC=_ldap._tcp.<SITENAME>._sites.dc record
594 add_srv_record(samdb, forest_container_dn, "DC=_ldap._tcp.%s._sites.dc" %
595 site, fqdn_hostname, 389)
597 # DC=_ldap._tcp.<SITENAME>._sites.gc record
598 add_srv_record(samdb, forest_container_dn, "DC=_ldap._tcp.%s._sites.gc" %
599 site, fqdn_hostname, 3268)
601 # DC=_ldap._tcp.gc record
602 add_srv_record(samdb, forest_container_dn, "DC=_ldap._tcp.gc",
605 # DC=_ldap._tcp.pdc record
606 add_srv_record(samdb, forest_container_dn, "DC=_ldap._tcp.pdc",
610 add_host_record(samdb, forest_container_dn, "DC=gc", hostip, hostip6)
612 # DC=_ldap._tcp.<DOMAINGUID>.domains record
613 add_srv_record(samdb, forest_container_dn,
614 "DC=_ldap._tcp.%s.domains" % domainguid, fqdn_hostname, 389)
617 add_cname_record(samdb, forest_container_dn, "DC=%s" % ntdsguid,
621 def secretsdb_setup_dns(secretsdb, names, private_dir, realm,
622 dnsdomain, dns_keytab_path, dnspass):
623 """Add DNS specific bits to a secrets database.
625 :param secretsdb: Ldb Handle to the secrets database
626 :param names: Names shortcut
627 :param machinepass: Machine password
630 os.unlink(os.path.join(private_dir, dns_keytab_path))
634 setup_ldb(secretsdb, setup_path("secrets_dns.ldif"), {
636 "DNSDOMAIN": dnsdomain,
637 "DNS_KEYTAB": dns_keytab_path,
638 "DNSPASS_B64": b64encode(dnspass),
639 "HOSTNAME": names.hostname,
640 "DNSNAME" : '%s.%s' % (
641 names.netbiosname.lower(), names.dnsdomain.lower())
645 def create_dns_dir(logger, paths):
646 """Write out a DNS zone file, from the info in the current database.
648 :param logger: Logger object
649 :param paths: paths object
651 dns_dir = os.path.dirname(paths.dns)
654 shutil.rmtree(dns_dir, True)
658 os.mkdir(dns_dir, 0770)
660 if paths.bind_gid is not None:
662 os.chown(dns_dir, -1, paths.bind_gid)
663 # chmod needed to cope with umask
664 os.chmod(dns_dir, 0770)
666 if not os.environ.has_key('SAMBA_SELFTEST'):
667 logger.error("Failed to chown %s to bind gid %u" % (
668 dns_dir, paths.bind_gid))
671 def create_zone_file(lp, logger, paths, targetdir, dnsdomain,
672 hostip, hostip6, hostname, realm, domainguid,
674 """Write out a DNS zone file, from the info in the current database.
676 :param paths: paths object
677 :param dnsdomain: DNS Domain name
678 :param domaindn: DN of the Domain
679 :param hostip: Local IPv4 IP
680 :param hostip6: Local IPv6 IP
681 :param hostname: Local hostname
682 :param realm: Realm name
683 :param domainguid: GUID of the domain.
684 :param ntdsguid: GUID of the hosts nTDSDSA record.
686 assert isinstance(domainguid, str)
688 if hostip6 is not None:
689 hostip6_base_line = " IN AAAA " + hostip6
690 hostip6_host_line = hostname + " IN AAAA " + hostip6
691 gc_msdcs_ip6_line = "gc._msdcs IN AAAA " + hostip6
693 hostip6_base_line = ""
694 hostip6_host_line = ""
695 gc_msdcs_ip6_line = ""
697 if hostip is not None:
698 hostip_base_line = " IN A " + hostip
699 hostip_host_line = hostname + " IN A " + hostip
700 gc_msdcs_ip_line = "gc._msdcs IN A " + hostip
702 hostip_base_line = ""
703 hostip_host_line = ""
704 gc_msdcs_ip_line = ""
706 # we need to freeze the zone while we update the contents
707 if targetdir is None:
708 rndc = ' '.join(lp.get("rndc command"))
709 os.system(rndc + " freeze " + lp.get("realm"))
711 setup_file(setup_path("provision.zone"), paths.dns, {
712 "HOSTNAME": hostname,
713 "DNSDOMAIN": dnsdomain,
715 "HOSTIP_BASE_LINE": hostip_base_line,
716 "HOSTIP_HOST_LINE": hostip_host_line,
717 "DOMAINGUID": domainguid,
718 "DATESTRING": time.strftime("%Y%m%d%H"),
720 "NTDSGUID": ntdsguid,
721 "HOSTIP6_BASE_LINE": hostip6_base_line,
722 "HOSTIP6_HOST_LINE": hostip6_host_line,
723 "GC_MSDCS_IP_LINE": gc_msdcs_ip_line,
724 "GC_MSDCS_IP6_LINE": gc_msdcs_ip6_line,
727 if paths.bind_gid is not None:
729 os.chown(paths.dns, -1, paths.bind_gid)
730 # chmod needed to cope with umask
731 os.chmod(paths.dns, 0664)
733 if not os.environ.has_key('SAMBA_SELFTEST'):
734 logger.error("Failed to chown %s to bind gid %u" % (
735 paths.dns, paths.bind_gid))
737 if targetdir is None:
738 os.system(rndc + " unfreeze " + lp.get("realm"))
741 def tdb_copy(logger, file1, file2):
742 """Copy tdb file using tdbbackup utility and rename it
744 # Find the location of tdbbackup tool
745 dirs = ["bin", samba.param.bin_dir()] + os.getenv('PATH').split(os.pathsep)
747 toolpath = os.path.join(d, "tdbbackup")
748 if os.path.exists(toolpath):
750 status = os.system("%s -s '.dns' %s" % (toolpath, file1))
752 os.rename("%s.dns" % file1, file2)
754 raise Exception("Error copying %s" % file1)
757 def create_samdb_copy(samdb, logger, paths, names, domainsid, domainguid):
758 """Create a copy of samdb and give write permissions to named for dns partitions
760 private_dir = paths.private_dir
761 samldb_dir = os.path.join(private_dir, "sam.ldb.d")
762 dns_dir = os.path.dirname(paths.dns)
763 dns_samldb_dir = os.path.join(dns_dir, "sam.ldb.d")
765 # Find the partitions and corresponding filenames
767 res = samdb.search(base="@PARTITION", scope=ldb.SCOPE_BASE, attrs=["partition"])
768 for tmp in res[0]["partition"]:
769 (nc, fname) = tmp.split(':')
770 partfile[nc.upper()] = fname
772 # Create empty domain partition
773 domaindn = names.domaindn.upper()
774 domainpart_file = os.path.join(dns_dir, partfile[domaindn])
776 os.mkdir(dns_samldb_dir)
777 file(domainpart_file, 'w').close()
779 # Fill the basedn and @OPTION records in domain partition
780 dom_ldb = samba.Ldb(domainpart_file)
781 domainguid_line = "objectGUID: %s\n-" % domainguid
782 descr = b64encode(get_domain_descriptor(domainsid))
783 setup_add_ldif(dom_ldb, setup_path("provision_basedn.ldif"), {
784 "DOMAINDN" : names.domaindn,
785 "DOMAINGUID" : domainguid_line,
786 "DOMAINSID" : str(domainsid),
787 "DESCRIPTOR" : descr})
788 setup_add_ldif(dom_ldb,
789 setup_path("provision_basedn_options.ldif"), None)
792 "Failed to setup database for BIND, AD based DNS cannot be used")
794 del partfile[domaindn]
796 # Link dns partitions and metadata
797 domainzonedn = "DC=DOMAINDNSZONES,%s" % names.domaindn.upper()
798 forestzonedn = "DC=FORESTDNSZONES,%s" % names.rootdn.upper()
799 domainzone_file = partfile[domainzonedn]
800 forestzone_file = partfile[forestzonedn]
801 metadata_file = "metadata.tdb"
803 os.link(os.path.join(samldb_dir, metadata_file),
804 os.path.join(dns_samldb_dir, metadata_file))
805 os.link(os.path.join(private_dir, domainzone_file),
806 os.path.join(dns_dir, domainzone_file))
807 os.link(os.path.join(private_dir, forestzone_file),
808 os.path.join(dns_dir, forestzone_file))
811 "Failed to setup database for BIND, AD based DNS cannot be used")
813 del partfile[domainzonedn]
814 del partfile[forestzonedn]
816 # Copy root, config, schema partitions (and any other if any)
817 # Since samdb is open in the current process, copy them in a child process
820 os.path.join(private_dir, "sam.ldb"),
821 os.path.join(dns_dir, "sam.ldb"))
825 os.path.join(private_dir, pfile),
826 os.path.join(dns_dir, pfile))
829 "Failed to setup database for BIND, AD based DNS cannot be used")
832 # Give bind read/write permissions dns partitions
833 if paths.bind_gid is not None:
835 os.chown(samldb_dir, -1, paths.bind_gid)
836 os.chmod(samldb_dir, 0750)
838 for dirname, dirs, files in os.walk(dns_dir):
840 dpath = os.path.join(dirname, d)
841 os.chown(dpath, -1, paths.bind_gid)
842 os.chmod(dpath, 0770)
844 if f.endswith('.ldb') or f.endswith('.tdb'):
845 fpath = os.path.join(dirname, f)
846 os.chown(fpath, -1, paths.bind_gid)
847 os.chmod(fpath, 0660)
849 if not os.environ.has_key('SAMBA_SELFTEST'):
851 "Failed to set permissions to sam.ldb* files, fix manually")
853 if not os.environ.has_key('SAMBA_SELFTEST'):
854 logger.warning("""Unable to find group id for BIND,
855 set permissions to sam.ldb* files manually""")
858 def create_dns_update_list(lp, logger, paths):
859 """Write out a dns_update_list file"""
860 # note that we use no variable substitution on this file
861 # the substitution is done at runtime by samba_dnsupdate, samba_spnupdate
862 setup_file(setup_path("dns_update_list"), paths.dns_update_list, None)
863 setup_file(setup_path("spn_update_list"), paths.spn_update_list, None)
866 def create_named_conf(paths, realm, dnsdomain, dns_backend):
867 """Write out a file containing zone statements suitable for inclusion in a
868 named.conf file (including GSS-TSIG configuration).
870 :param paths: all paths
871 :param realm: Realm name
872 :param dnsdomain: DNS Domain name
873 :param dns_backend: DNS backend type
874 :param keytab_name: File name of DNS keytab file
877 if dns_backend == "BIND9_FLATFILE":
878 setup_file(setup_path("named.conf"), paths.namedconf, {
879 "DNSDOMAIN": dnsdomain,
881 "ZONE_FILE": paths.dns,
882 "REALM_WC": "*." + ".".join(realm.split(".")[1:]),
883 "NAMED_CONF": paths.namedconf,
884 "NAMED_CONF_UPDATE": paths.namedconf_update
887 setup_file(setup_path("named.conf.update"), paths.namedconf_update)
889 elif dns_backend == "BIND9_DLZ":
890 setup_file(setup_path("named.conf.dlz"), paths.namedconf, {
891 "NAMED_CONF": paths.namedconf,
892 "MODULESDIR" : samba.param.modules_dir(),
896 def create_named_txt(path, realm, dnsdomain, dnsname, private_dir,
898 """Write out a file containing zone statements suitable for inclusion in a
899 named.conf file (including GSS-TSIG configuration).
901 :param path: Path of the new named.conf file.
902 :param realm: Realm name
903 :param dnsdomain: DNS Domain name
904 :param private_dir: Path to private directory
905 :param keytab_name: File name of DNS keytab file
907 setup_file(setup_path("named.txt"), path, {
908 "DNSDOMAIN": dnsdomain,
911 "DNS_KEYTAB": keytab_name,
912 "DNS_KEYTAB_ABS": os.path.join(private_dir, keytab_name),
913 "PRIVATE_DIR": private_dir
917 def is_valid_dns_backend(dns_backend):
918 return dns_backend in ("BIND9_FLATFILE", "BIND9_DLZ", "SAMBA_INTERNAL", "NONE")
921 def is_valid_os_level(os_level):
922 return DS_DOMAIN_FUNCTION_2000 <= os_level <= DS_DOMAIN_FUNCTION_2008_R2
925 def create_dns_legacy(samdb, domainsid, forestdn, dnsadmins_sid):
926 # Set up MicrosoftDNS container
927 add_dns_container(samdb, forestdn, "CN=System", domainsid, dnsadmins_sid)
929 add_rootservers(samdb, forestdn, "CN=System")
932 def fill_dns_data_legacy(samdb, domainsid, forestdn, dnsdomain, site, hostname,
933 hostip, hostip6, dnsadmins_sid):
935 add_domain_record(samdb, forestdn, "CN=System", dnsdomain, domainsid,
938 # Add DNS records for a DC in domain
939 add_dc_domain_records(samdb, forestdn, "CN=System", site, dnsdomain,
940 hostname, hostip, hostip6)
943 def create_dns_partitions(samdb, domainsid, names, domaindn, forestdn,
945 # Set up additional partitions (DomainDnsZones, ForstDnsZones)
946 setup_dns_partitions(samdb, domainsid, domaindn, forestdn,
947 names.configdn, names.serverdn)
949 # Set up MicrosoftDNS containers
950 add_dns_container(samdb, domaindn, "DC=DomainDnsZones", domainsid,
952 add_dns_container(samdb, forestdn, "DC=ForestDnsZones", domainsid,
953 dnsadmins_sid, forest=True)
956 def fill_dns_data_partitions(samdb, domainsid, site, domaindn, forestdn,
957 dnsdomain, dnsforest, hostname, hostip, hostip6,
958 domainguid, ntdsguid, dnsadmins_sid, autofill=True):
959 """Fill data in various AD partitions
961 :param samdb: LDB object connected to sam.ldb file
962 :param domainsid: Domain SID (as dom_sid object)
963 :param site: Site name to create hostnames in
964 :param domaindn: DN of the domain
965 :param forestdn: DN of the forest
966 :param dnsdomain: DNS name of the domain
967 :param dnsforest: DNS name of the forest
968 :param hostname: Host name of this DC
969 :param hostip: IPv4 addresses
970 :param hostip6: IPv6 addresses
971 :param domainguid: Domain GUID
972 :param ntdsguid: NTDS GUID
973 :param dnsadmins_sid: SID for DnsAdmins group
974 :param autofill: Create DNS records (using fixed template)
977 ##### Set up DC=DomainDnsZones,<DOMAINDN>
978 # Add rootserver records
979 add_rootservers(samdb, domaindn, "DC=DomainDnsZones")
982 add_domain_record(samdb, domaindn, "DC=DomainDnsZones", dnsdomain,
983 domainsid, dnsadmins_sid)
985 # Add DNS records for a DC in domain
987 add_dc_domain_records(samdb, domaindn, "DC=DomainDnsZones", site,
988 dnsdomain, hostname, hostip, hostip6)
990 ##### Set up DC=ForestDnsZones,<DOMAINDN>
992 add_msdcs_record(samdb, forestdn, "DC=ForestDnsZones", dnsforest)
994 # Add DNS records for a DC in forest
996 add_dc_msdcs_records(samdb, forestdn, "DC=ForestDnsZones", site,
997 dnsforest, hostname, hostip, hostip6,
998 domainguid, ntdsguid)
1001 def setup_ad_dns(samdb, secretsdb, domainsid, names, paths, lp, logger,
1002 dns_backend, os_level, site, dnspass=None, hostip=None, hostip6=None,
1004 """Provision DNS information (assuming GC role)
1006 :param samdb: LDB object connected to sam.ldb file
1007 :param secretsdb: LDB object connected to secrets.ldb file
1008 :param domainsid: Domain SID (as dom_sid object)
1009 :param names: Names shortcut
1010 :param paths: Paths shortcut
1011 :param lp: Loadparm object
1012 :param logger: Logger object
1013 :param dns_backend: Type of DNS backend
1014 :param os_level: Functional level (treated as os level)
1015 :param site: Site to create hostnames in
1016 :param dnspass: Password for bind's DNS account
1017 :param hostip: IPv4 address
1018 :param hostip6: IPv6 address
1019 :param targetdir: Target directory for creating DNS-related files for BIND9
1022 if not is_valid_dns_backend(dns_backend):
1023 raise Exception("Invalid dns backend: %r" % dns_backend)
1025 if not is_valid_os_level(os_level):
1026 raise Exception("Invalid os level: %r" % os_level)
1028 if dns_backend == "NONE":
1029 logger.info("No DNS backend set, not configuring DNS")
1032 # Add dns accounts (DnsAdmins, DnsUpdateProxy) in domain
1033 logger.info("Adding DNS accounts")
1034 add_dns_accounts(samdb, names.domaindn)
1036 # If dns_backend is BIND9_FLATFILE
1037 # Populate only CN=MicrosoftDNS,CN=System,<FORESTDN>
1039 # If dns_backend is SAMBA_INTERNAL or BIND9_DLZ
1040 # Populate DNS partitions
1042 # If os_level < 2003 (DS_DOMAIN_FUNCTION_2000)
1043 # All dns records are in CN=MicrosoftDNS,CN=System,<FORESTDN>
1045 # If os_level >= 2003 (DS_DOMAIN_FUNCTION_2003, DS_DOMAIN_FUNCTION_2008,
1046 # DS_DOMAIN_FUNCTION_2008_R2)
1047 # Root server records are in CN=MicrosoftDNS,CN=System,<FORESTDN>
1048 # Domain records are in CN=MicrosoftDNS,CN=System,<FORESTDN>
1049 # Domain records are in CN=MicrosoftDNS,DC=DomainDnsZones,<DOMAINDN>
1050 # Forest records are in CN=MicrosoftDNS,DC=ForestDnsZones,<FORESTDN>
1051 domaindn = names.domaindn
1052 forestdn = samdb.get_root_basedn().get_linearized()
1054 dnsdomain = names.dnsdomain.lower()
1055 dnsforest = dnsdomain
1057 hostname = names.netbiosname.lower()
1059 dnsadmins_sid = get_dnsadmins_sid(samdb, domaindn)
1060 domainguid = get_domainguid(samdb, domaindn)
1063 logger.info("Creating CN=MicrosoftDNS,CN=System,%s" % forestdn)
1064 create_dns_legacy(samdb, domainsid, forestdn, dnsadmins_sid)
1066 if os_level == DS_DOMAIN_FUNCTION_2000:
1067 # Populating legacy dns
1068 logger.info("Populating CN=MicrosoftDNS,CN=System,%s" % forestdn)
1069 fill_dns_data_legacy(samdb, domainsid, forestdn, dnsdomain, site,
1070 hostname, hostip, hostip6, dnsadmins_sid)
1072 elif dns_backend in ("SAMBA_INTERNAL", "BIND9_DLZ") and \
1073 os_level >= DS_DOMAIN_FUNCTION_2003:
1075 # Create DNS partitions
1076 logger.info("Creating DomainDnsZones and ForestDnsZones partitions")
1077 create_dns_partitions(samdb, domainsid, names, domaindn, forestdn,
1080 # Populating dns partitions
1081 logger.info("Populating DomainDnsZones and ForestDnsZones partitions")
1082 fill_dns_data_partitions(samdb, domainsid, site, domaindn, forestdn,
1083 dnsdomain, dnsforest, hostname, hostip, hostip6,
1084 domainguid, names.ntdsguid, dnsadmins_sid)
1086 if dns_backend.startswith("BIND9_"):
1087 setup_bind9_dns(samdb, secretsdb, domainsid, names, paths, lp, logger,
1088 dns_backend, os_level, site=site, dnspass=dnspass, hostip=hostip,
1089 hostip6=hostip6, targetdir=targetdir)
1092 def setup_bind9_dns(samdb, secretsdb, domainsid, names, paths, lp, logger,
1093 dns_backend, os_level, site=None, dnspass=None, hostip=None,
1094 hostip6=None, targetdir=None):
1095 """Provision DNS information (assuming BIND9 backend in DC role)
1097 :param samdb: LDB object connected to sam.ldb file
1098 :param secretsdb: LDB object connected to secrets.ldb file
1099 :param domainsid: Domain SID (as dom_sid object)
1100 :param names: Names shortcut
1101 :param paths: Paths shortcut
1102 :param lp: Loadparm object
1103 :param logger: Logger object
1104 :param dns_backend: Type of DNS backend
1105 :param os_level: Functional level (treated as os level)
1106 :param site: Site to create hostnames in
1107 :param dnspass: Password for bind's DNS account
1108 :param hostip: IPv4 address
1109 :param hostip6: IPv6 address
1110 :param targetdir: Target directory for creating DNS-related files for BIND9
1113 if (not is_valid_dns_backend(dns_backend) or
1114 not dns_backend.startswith("BIND9_")):
1115 raise Exception("Invalid dns backend: %r" % dns_backend)
1117 if not is_valid_os_level(os_level):
1118 raise Exception("Invalid os level: %r" % os_level)
1120 domaindn = names.domaindn
1122 domainguid = get_domainguid(samdb, domaindn)
1124 secretsdb_setup_dns(secretsdb, names,
1125 paths.private_dir, realm=names.realm,
1126 dnsdomain=names.dnsdomain,
1127 dns_keytab_path=paths.dns_keytab, dnspass=dnspass)
1129 create_dns_dir(logger, paths)
1131 if dns_backend == "BIND9_FLATFILE":
1132 create_zone_file(lp, logger, paths, targetdir, site=site,
1133 dnsdomain=names.dnsdomain, hostip=hostip,
1134 hostip6=hostip6, hostname=names.hostname,
1135 realm=names.realm, domainguid=domainguid,
1136 ntdsguid=names.ntdsguid)
1138 if dns_backend == "BIND9_DLZ" and os_level >= DS_DOMAIN_FUNCTION_2003:
1139 create_samdb_copy(samdb, logger, paths, names, domainsid, domainguid)
1141 create_named_conf(paths, realm=names.realm,
1142 dnsdomain=names.dnsdomain, dns_backend=dns_backend)
1144 create_named_txt(paths.namedtxt,
1145 realm=names.realm, dnsdomain=names.dnsdomain,
1146 dnsname = "%s.%s" % (names.hostname, names.dnsdomain),
1147 private_dir=paths.private_dir,
1148 keytab_name=paths.dns_keytab)
1149 logger.info("See %s for an example configuration include file for BIND",
1151 logger.info("and %s for further documentation required for secure DNS "
1152 "updates", paths.namedtxt)