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
31 from samba.tdb_util import tdb_copy
32 from samba.ndr import ndr_pack, ndr_unpack
33 from samba import setup_file
34 from samba.dcerpc import dnsp, misc, security
35 from samba.dsdb import (
36 DS_DOMAIN_FUNCTION_2000,
37 DS_DOMAIN_FUNCTION_2003,
38 DS_DOMAIN_FUNCTION_2008_R2
40 from samba.descriptor import (
41 get_domain_descriptor,
42 get_domain_delete_protected1_descriptor,
43 get_domain_delete_protected2_descriptor,
44 get_dns_partition_descriptor,
45 get_dns_forest_microsoft_dns_descriptor,
46 get_dns_domain_microsoft_dns_descriptor
48 from samba.provision.common import (
60 def get_domainguid(samdb, domaindn):
61 res = samdb.search(base=domaindn, scope=ldb.SCOPE_BASE, attrs=["objectGUID"])
62 domainguid = str(ndr_unpack(misc.GUID, res[0]["objectGUID"][0]))
66 def get_dnsadmins_sid(samdb, domaindn):
67 res = samdb.search(base="CN=DnsAdmins,CN=Users,%s" % domaindn, scope=ldb.SCOPE_BASE,
69 dnsadmins_sid = ndr_unpack(security.dom_sid, res[0]["objectSid"][0])
73 class ARecord(dnsp.DnssrvRpcRecord):
75 def __init__(self, ip_addr, serial=1, ttl=900, rank=dnsp.DNS_RANK_ZONE):
76 super(ARecord, self).__init__()
77 self.wType = dnsp.DNS_TYPE_A
79 self.dwSerial = serial
80 self.dwTtlSeconds = ttl
84 class AAAARecord(dnsp.DnssrvRpcRecord):
86 def __init__(self, ip6_addr, serial=1, ttl=900, rank=dnsp.DNS_RANK_ZONE):
87 super(AAAARecord, self).__init__()
88 self.wType = dnsp.DNS_TYPE_AAAA
90 self.dwSerial = serial
91 self.dwTtlSeconds = ttl
95 class CNameRecord(dnsp.DnssrvRpcRecord):
97 def __init__(self, cname, serial=1, ttl=900, rank=dnsp.DNS_RANK_ZONE):
98 super(CNameRecord, self).__init__()
99 self.wType = dnsp.DNS_TYPE_CNAME
101 self.dwSerial = serial
102 self.dwTtlSeconds = ttl
106 class NSRecord(dnsp.DnssrvRpcRecord):
108 def __init__(self, dns_server, serial=1, ttl=900, rank=dnsp.DNS_RANK_ZONE):
109 super(NSRecord, self).__init__()
110 self.wType = dnsp.DNS_TYPE_NS
112 self.dwSerial = serial
113 self.dwTtlSeconds = ttl
114 self.data = dns_server
117 class SOARecord(dnsp.DnssrvRpcRecord):
119 def __init__(self, mname, rname, serial=1, refresh=900, retry=600,
120 expire=86400, minimum=3600, ttl=3600, rank=dnsp.DNS_RANK_ZONE):
121 super(SOARecord, self).__init__()
122 self.wType = dnsp.DNS_TYPE_SOA
124 self.dwSerial = serial
125 self.dwTtlSeconds = ttl
128 soa.refresh = refresh
133 soa.minimum = minimum
137 class SRVRecord(dnsp.DnssrvRpcRecord):
139 def __init__(self, target, port, priority=0, weight=100, serial=1, ttl=900,
140 rank=dnsp.DNS_RANK_ZONE):
141 super(SRVRecord, self).__init__()
142 self.wType = dnsp.DNS_TYPE_SRV
144 self.dwSerial = serial
145 self.dwTtlSeconds = ttl
147 srv.nameTarget = target
149 srv.wPriority = priority
154 class TXTRecord(dnsp.DnssrvRpcRecord):
156 def __init__(self, slist, serial=1, ttl=900, rank=dnsp.DNS_RANK_ZONE):
157 super(TXTRecord, self).__init__()
158 self.wType = dnsp.DNS_TYPE_TXT
160 self.dwSerial = serial
161 self.dwTtlSeconds = ttl
162 stringlist = dnsp.string_list()
163 stringlist.count = len(slist)
164 stringlist.str = slist
165 self.data = stringlist
168 class TypeProperty(dnsp.DnsProperty):
170 def __init__(self, zone_type=dnsp.DNS_ZONE_TYPE_PRIMARY):
171 super(TypeProperty, self).__init__()
174 self.id = dnsp.DSPROPERTY_ZONE_TYPE
175 self.data = zone_type
178 class AllowUpdateProperty(dnsp.DnsProperty):
180 def __init__(self, allow_update=dnsp.DNS_ZONE_UPDATE_SECURE):
181 super(AllowUpdateProperty, self).__init__()
184 self.id = dnsp.DSPROPERTY_ZONE_ALLOW_UPDATE
185 self.data = allow_update
188 class SecureTimeProperty(dnsp.DnsProperty):
190 def __init__(self, secure_time=0):
191 super(SecureTimeProperty, self).__init__()
194 self.id = dnsp.DSPROPERTY_ZONE_SECURE_TIME
195 self.data = secure_time
198 class NorefreshIntervalProperty(dnsp.DnsProperty):
200 def __init__(self, norefresh_interval=0):
201 super(NorefreshIntervalProperty, self).__init__()
204 self.id = dnsp.DSPROPERTY_ZONE_NOREFRESH_INTERVAL
205 self.data = norefresh_interval
208 class RefreshIntervalProperty(dnsp.DnsProperty):
210 def __init__(self, refresh_interval=0):
211 super(RefreshIntervalProperty, self).__init__()
214 self.id = dnsp.DSPROPERTY_ZONE_REFRESH_INTERVAL
215 self.data = refresh_interval
218 class AgingStateProperty(dnsp.DnsProperty):
220 def __init__(self, aging_enabled=0):
221 super(AgingStateProperty, self).__init__()
224 self.id = dnsp.DSPROPERTY_ZONE_AGING_STATE
225 self.data = aging_enabled
228 class AgingEnabledTimeProperty(dnsp.DnsProperty):
230 def __init__(self, next_cycle_hours=0):
231 super(AgingEnabledTimeProperty, self).__init__()
234 self.id = dnsp.DSPROPERTY_ZONE_AGING_ENABLED_TIME
235 self.data = next_cycle_hours
238 def setup_dns_partitions(samdb, domainsid, domaindn, forestdn, configdn,
239 serverdn, fill_level):
240 domainzone_dn = "DC=DomainDnsZones,%s" % domaindn
241 forestzone_dn = "DC=ForestDnsZones,%s" % forestdn
242 descriptor = get_dns_partition_descriptor(domainsid)
244 setup_add_ldif(samdb, setup_path("provision_dnszones_partitions.ldif"), {
245 "ZONE_DN": domainzone_dn,
246 "SECDESC" : b64encode(descriptor)
248 if fill_level != FILL_SUBDOMAIN:
249 setup_add_ldif(samdb, setup_path("provision_dnszones_partitions.ldif"), {
250 "ZONE_DN": forestzone_dn,
251 "SECDESC" : b64encode(descriptor)
254 domainzone_guid = get_domainguid(samdb, domainzone_dn)
255 forestzone_guid = get_domainguid(samdb, forestzone_dn)
257 domainzone_guid = str(uuid.uuid4())
258 forestzone_guid = str(uuid.uuid4())
260 domainzone_dns = ldb.Dn(samdb, domainzone_dn).canonical_ex_str().strip()
261 forestzone_dns = ldb.Dn(samdb, forestzone_dn).canonical_ex_str().strip()
263 protected1_desc = get_domain_delete_protected1_descriptor(domainsid)
264 protected2_desc = get_domain_delete_protected2_descriptor(domainsid)
265 setup_add_ldif(samdb, setup_path("provision_dnszones_add.ldif"), {
266 "ZONE_DN": domainzone_dn,
267 "ZONE_GUID": domainzone_guid,
268 "ZONE_DNS": domainzone_dns,
269 "CONFIGDN": configdn,
270 "SERVERDN": serverdn,
271 "LOSTANDFOUND_DESCRIPTOR": b64encode(protected2_desc),
272 "INFRASTRUCTURE_DESCRIPTOR": b64encode(protected1_desc),
274 setup_modify_ldif(samdb, setup_path("provision_dnszones_modify.ldif"), {
275 "CONFIGDN": configdn,
276 "SERVERDN": serverdn,
277 "ZONE_DN": domainzone_dn,
280 if fill_level != FILL_SUBDOMAIN:
281 setup_add_ldif(samdb, setup_path("provision_dnszones_add.ldif"), {
282 "ZONE_DN": forestzone_dn,
283 "ZONE_GUID": forestzone_guid,
284 "ZONE_DNS": forestzone_dns,
285 "CONFIGDN": configdn,
286 "SERVERDN": serverdn,
287 "LOSTANDFOUND_DESCRIPTOR": b64encode(protected2_desc),
288 "INFRASTRUCTURE_DESCRIPTOR": b64encode(protected1_desc),
290 setup_modify_ldif(samdb, setup_path("provision_dnszones_modify.ldif"), {
291 "CONFIGDN": configdn,
292 "SERVERDN": serverdn,
293 "ZONE_DN": forestzone_dn,
297 def add_dns_accounts(samdb, domaindn):
298 setup_add_ldif(samdb, setup_path("provision_dns_accounts_add.ldif"), {
299 "DOMAINDN": domaindn,
303 def add_dns_container(samdb, domaindn, prefix, domain_sid, dnsadmins_sid, forest=False):
304 name_map = {'DnsAdmins': str(dnsadmins_sid)}
306 sd_val = get_dns_forest_microsoft_dns_descriptor(domain_sid,
309 sd_val = get_dns_domain_microsoft_dns_descriptor(domain_sid,
311 # CN=MicrosoftDNS,<PREFIX>,<DOMAINDN>
312 msg = ldb.Message(ldb.Dn(samdb, "CN=MicrosoftDNS,%s,%s" % (prefix, domaindn)))
313 msg["objectClass"] = ["top", "container"]
314 msg["nTSecurityDescriptor"] = ldb.MessageElement(sd_val, ldb.FLAG_MOD_ADD,
315 "nTSecurityDescriptor")
319 def add_rootservers(samdb, domaindn, prefix):
321 rootservers["a.root-servers.net"] = "198.41.0.4"
322 rootservers["b.root-servers.net"] = "192.228.79.201"
323 rootservers["c.root-servers.net"] = "192.33.4.12"
324 rootservers["d.root-servers.net"] = "128.8.10.90"
325 rootservers["e.root-servers.net"] = "192.203.230.10"
326 rootservers["f.root-servers.net"] = "192.5.5.241"
327 rootservers["g.root-servers.net"] = "192.112.36.4"
328 rootservers["h.root-servers.net"] = "128.63.2.53"
329 rootservers["i.root-servers.net"] = "192.36.148.17"
330 rootservers["j.root-servers.net"] = "192.58.128.30"
331 rootservers["k.root-servers.net"] = "193.0.14.129"
332 rootservers["l.root-servers.net"] = "199.7.83.42"
333 rootservers["m.root-servers.net"] = "202.12.27.33"
336 rootservers_v6["a.root-servers.net"] = "2001:503:ba3e::2:30"
337 rootservers_v6["f.root-servers.net"] = "2001:500:2f::f"
338 rootservers_v6["h.root-servers.net"] = "2001:500:1::803f:235"
339 rootservers_v6["j.root-servers.net"] = "2001:503:c27::2:30"
340 rootservers_v6["k.root-servers.net"] = "2001:7fd::1"
341 rootservers_v6["m.root-servers.net"] = "2001:dc3::35"
343 container_dn = "DC=RootDNSServers,CN=MicrosoftDNS,%s,%s" % (prefix, domaindn)
345 # Add DC=RootDNSServers,CN=MicrosoftDNS,<PREFIX>,<DOMAINDN>
346 msg = ldb.Message(ldb.Dn(samdb, container_dn))
348 props.append(ndr_pack(TypeProperty(zone_type=dnsp.DNS_ZONE_TYPE_CACHE)))
349 props.append(ndr_pack(AllowUpdateProperty(allow_update=dnsp.DNS_ZONE_UPDATE_OFF)))
350 props.append(ndr_pack(SecureTimeProperty()))
351 props.append(ndr_pack(NorefreshIntervalProperty()))
352 props.append(ndr_pack(RefreshIntervalProperty()))
353 props.append(ndr_pack(AgingStateProperty()))
354 props.append(ndr_pack(AgingEnabledTimeProperty()))
355 msg["objectClass"] = ["top", "dnsZone"]
356 msg["cn"] = ldb.MessageElement("Zone", ldb.FLAG_MOD_ADD, "cn")
357 msg["dNSProperty"] = ldb.MessageElement(props, ldb.FLAG_MOD_ADD, "dNSProperty")
360 # Add DC=@,DC=RootDNSServers,CN=MicrosoftDNS,<PREFIX>,<DOMAINDN>
362 for rserver in rootservers:
363 record.append(ndr_pack(NSRecord(rserver, serial=0, ttl=0, rank=dnsp.DNS_RANK_ROOT_HINT)))
365 msg = ldb.Message(ldb.Dn(samdb, "DC=@,%s" % container_dn))
366 msg["objectClass"] = ["top", "dnsNode"]
367 msg["dnsRecord"] = ldb.MessageElement(record, ldb.FLAG_MOD_ADD, "dnsRecord")
370 # Add DC=<rootserver>,DC=RootDNSServers,CN=MicrosoftDNS,<PREFIX>,<DOMAINDN>
371 for rserver in rootservers:
372 record = [ndr_pack(ARecord(rootservers[rserver], serial=0, ttl=0, rank=dnsp.DNS_RANK_ROOT_HINT))]
373 # Add AAAA record as well (How does W2K* add IPv6 records?)
374 #if rserver in rootservers_v6:
375 # record.append(ndr_pack(AAAARecord(rootservers_v6[rserver], serial=0, ttl=0)))
376 msg = ldb.Message(ldb.Dn(samdb, "DC=%s,%s" % (rserver, container_dn)))
377 msg["objectClass"] = ["top", "dnsNode"]
378 msg["dnsRecord"] = ldb.MessageElement(record, ldb.FLAG_MOD_ADD, "dnsRecord")
381 def add_at_record(samdb, container_dn, prefix, hostname, dnsdomain, hostip, hostip6):
383 fqdn_hostname = "%s.%s" % (hostname, dnsdomain)
388 at_soa_record = SOARecord(fqdn_hostname, "hostmaster.%s" % dnsdomain)
389 at_records.append(ndr_pack(at_soa_record))
392 at_ns_record = NSRecord(fqdn_hostname)
393 at_records.append(ndr_pack(at_ns_record))
395 if hostip is not None:
397 at_a_record = ARecord(hostip)
398 at_records.append(ndr_pack(at_a_record))
400 if hostip6 is not None:
402 at_aaaa_record = AAAARecord(hostip6)
403 at_records.append(ndr_pack(at_aaaa_record))
405 msg = ldb.Message(ldb.Dn(samdb, "DC=@,%s" % container_dn))
406 msg["objectClass"] = ["top", "dnsNode"]
407 msg["dnsRecord"] = ldb.MessageElement(at_records, ldb.FLAG_MOD_ADD, "dnsRecord")
411 def add_srv_record(samdb, container_dn, prefix, host, port):
412 srv_record = SRVRecord(host, port)
413 msg = ldb.Message(ldb.Dn(samdb, "%s,%s" % (prefix, container_dn)))
414 msg["objectClass"] = ["top", "dnsNode"]
415 msg["dnsRecord"] = ldb.MessageElement(ndr_pack(srv_record), ldb.FLAG_MOD_ADD, "dnsRecord")
419 def add_ns_record(samdb, container_dn, prefix, host):
420 ns_record = NSRecord(host)
421 msg = ldb.Message(ldb.Dn(samdb, "%s,%s" % (prefix, container_dn)))
422 msg["objectClass"] = ["top", "dnsNode"]
423 msg["dnsRecord"] = ldb.MessageElement(ndr_pack(ns_record), ldb.FLAG_MOD_ADD, "dnsRecord")
427 def add_ns_glue_record(samdb, container_dn, prefix, host):
428 ns_record = NSRecord(host, rank=dnsp.DNS_RANK_NS_GLUE)
429 msg = ldb.Message(ldb.Dn(samdb, "%s,%s" % (prefix, container_dn)))
430 msg["objectClass"] = ["top", "dnsNode"]
431 msg["dnsRecord"] = ldb.MessageElement(ndr_pack(ns_record), ldb.FLAG_MOD_ADD, "dnsRecord")
435 def add_cname_record(samdb, container_dn, prefix, host):
436 cname_record = CNameRecord(host)
437 msg = ldb.Message(ldb.Dn(samdb, "%s,%s" % (prefix, container_dn)))
438 msg["objectClass"] = ["top", "dnsNode"]
439 msg["dnsRecord"] = ldb.MessageElement(ndr_pack(cname_record), ldb.FLAG_MOD_ADD, "dnsRecord")
443 def add_host_record(samdb, container_dn, prefix, hostip, hostip6):
446 a_record = ARecord(hostip)
447 host_records.append(ndr_pack(a_record))
449 aaaa_record = AAAARecord(hostip6)
450 host_records.append(ndr_pack(aaaa_record))
452 msg = ldb.Message(ldb.Dn(samdb, "%s,%s" % (prefix, container_dn)))
453 msg["objectClass"] = ["top", "dnsNode"]
454 msg["dnsRecord"] = ldb.MessageElement(host_records, ldb.FLAG_MOD_ADD, "dnsRecord")
458 def add_domain_record(samdb, domaindn, prefix, dnsdomain, domainsid, dnsadmins_sid):
459 # DC=<DNSDOMAIN>,CN=MicrosoftDNS,<PREFIX>,<DOMAINDN>
460 sddl = "O:SYG:BAD:AI" \
461 "(A;;RPWPCRCCDCLCLORCWOWDSDDTSW;;;DA)" \
463 "(A;;RPLCLORC;;;WD)" \
464 "(A;;RPWPCRCCDCLCLORCWOWDSDDTSW;;;SY)" \
465 "(A;CI;RPWPCRCCDCLCRCWOWDSDDTSW;;;ED)" \
466 "(A;CIID;RPWPCRCCDCLCRCWOWDSDDTSW;;;%s)" \
467 "(A;CIID;RPWPCRCCDCLCRCWOWDSDDTSW;;;ED)" \
468 "(OA;CIID;RPWPCR;91e647de-d96f-4b70-9557-d63ff4f3ccd8;;PS)" \
469 "(A;CIID;RPWPCRCCDCLCLORCWOWDSDDTSW;;;EA)" \
471 "(A;CIID;RPWPCRCCLCLORCWOWDSDSW;;;BA)" \
472 "S:AI" % dnsadmins_sid
473 sec = security.descriptor.from_sddl(sddl, domainsid)
475 props.append(ndr_pack(TypeProperty()))
476 props.append(ndr_pack(AllowUpdateProperty()))
477 props.append(ndr_pack(SecureTimeProperty()))
478 props.append(ndr_pack(NorefreshIntervalProperty(norefresh_interval=168)))
479 props.append(ndr_pack(RefreshIntervalProperty(refresh_interval=168)))
480 props.append(ndr_pack(AgingStateProperty()))
481 props.append(ndr_pack(AgingEnabledTimeProperty()))
482 msg = ldb.Message(ldb.Dn(samdb, "DC=%s,CN=MicrosoftDNS,%s,%s" % (dnsdomain, prefix, domaindn)))
483 msg["objectClass"] = ["top", "dnsZone"]
484 msg["ntSecurityDescriptor"] = ldb.MessageElement(ndr_pack(sec), ldb.FLAG_MOD_ADD,
485 "nTSecurityDescriptor")
486 msg["dNSProperty"] = ldb.MessageElement(props, ldb.FLAG_MOD_ADD, "dNSProperty")
490 def add_msdcs_record(samdb, forestdn, prefix, dnsforest):
491 # DC=_msdcs.<DNSFOREST>,CN=MicrosoftDNS,<PREFIX>,<FORESTDN>
492 msg = ldb.Message(ldb.Dn(samdb, "DC=_msdcs.%s,CN=MicrosoftDNS,%s,%s" %
493 (dnsforest, prefix, forestdn)))
494 msg["objectClass"] = ["top", "dnsZone"]
498 def add_dc_domain_records(samdb, domaindn, prefix, site, dnsdomain, hostname,
501 fqdn_hostname = "%s.%s" % (hostname, dnsdomain)
503 # Set up domain container - DC=<DNSDOMAIN>,CN=MicrosoftDNS,<PREFIX>,<DOMAINDN>
504 domain_container_dn = ldb.Dn(samdb, "DC=%s,CN=MicrosoftDNS,%s,%s" %
505 (dnsdomain, prefix, domaindn))
508 add_at_record(samdb, domain_container_dn, "DC=@", hostname, dnsdomain,
511 # DC=<HOSTNAME> record
512 add_host_record(samdb, domain_container_dn, "DC=%s" % hostname, hostip,
515 # DC=_kerberos._tcp record
516 add_srv_record(samdb, domain_container_dn, "DC=_kerberos._tcp",
519 # DC=_kerberos._tcp.<SITENAME>._sites record
520 add_srv_record(samdb, domain_container_dn, "DC=_kerberos._tcp.%s._sites" %
521 site, fqdn_hostname, 88)
523 # DC=_kerberos._udp record
524 add_srv_record(samdb, domain_container_dn, "DC=_kerberos._udp",
527 # DC=_kpasswd._tcp record
528 add_srv_record(samdb, domain_container_dn, "DC=_kpasswd._tcp",
531 # DC=_kpasswd._udp record
532 add_srv_record(samdb, domain_container_dn, "DC=_kpasswd._udp",
535 # DC=_ldap._tcp record
536 add_srv_record(samdb, domain_container_dn, "DC=_ldap._tcp", fqdn_hostname,
539 # DC=_ldap._tcp.<SITENAME>._sites record
540 add_srv_record(samdb, domain_container_dn, "DC=_ldap._tcp.%s._sites" %
541 site, fqdn_hostname, 389)
543 # FIXME: The number of SRV records depend on the various roles this DC has.
544 # _gc and _msdcs records are added if the we are the forest dc and not subdomain dc
546 # Assumption: current DC is GC and add all the entries
549 add_srv_record(samdb, domain_container_dn, "DC=_gc._tcp", fqdn_hostname,
552 # DC=_gc._tcp.<SITENAME>,_sites record
553 add_srv_record(samdb, domain_container_dn, "DC=_gc._tcp.%s._sites" % site,
557 add_ns_glue_record(samdb, domain_container_dn, "DC=_msdcs", fqdn_hostname)
559 # FIXME: Following entries are added only if DomainDnsZones and ForestDnsZones partitions
562 # Assumption: Additional entries won't hurt on os_level = 2000
564 # DC=_ldap._tcp.<SITENAME>._sites.DomainDnsZones
565 add_srv_record(samdb, domain_container_dn,
566 "DC=_ldap._tcp.%s._sites.DomainDnsZones" % site, fqdn_hostname,
569 # DC=_ldap._tcp.<SITENAME>._sites.ForestDnsZones
570 add_srv_record(samdb, domain_container_dn,
571 "DC=_ldap._tcp.%s._sites.ForestDnsZones" % site, fqdn_hostname,
574 # DC=_ldap._tcp.DomainDnsZones
575 add_srv_record(samdb, domain_container_dn, "DC=_ldap._tcp.DomainDnsZones",
578 # DC=_ldap._tcp.ForestDnsZones
579 add_srv_record(samdb, domain_container_dn, "DC=_ldap._tcp.ForestDnsZones",
583 add_host_record(samdb, domain_container_dn, "DC=DomainDnsZones", hostip,
587 add_host_record(samdb, domain_container_dn, "DC=ForestDnsZones", hostip,
591 def add_dc_msdcs_records(samdb, forestdn, prefix, site, dnsforest, hostname,
592 hostip, hostip6, domainguid, ntdsguid):
594 fqdn_hostname = "%s.%s" % (hostname, dnsforest)
596 # Set up forest container - DC=<DNSDOMAIN>,CN=MicrosoftDNS,<PREFIX>,<DOMAINDN>
597 forest_container_dn = ldb.Dn(samdb, "DC=_msdcs.%s,CN=MicrosoftDNS,%s,%s" %
598 (dnsforest, prefix, forestdn))
601 add_at_record(samdb, forest_container_dn, "DC=@", hostname, dnsforest,
604 # DC=_kerberos._tcp.dc record
605 add_srv_record(samdb, forest_container_dn, "DC=_kerberos._tcp.dc",
608 # DC=_kerberos._tcp.<SITENAME>._sites.dc record
609 add_srv_record(samdb, forest_container_dn,
610 "DC=_kerberos._tcp.%s._sites.dc" % site, fqdn_hostname, 88)
612 # DC=_ldap._tcp.dc record
613 add_srv_record(samdb, forest_container_dn, "DC=_ldap._tcp.dc",
616 # DC=_ldap._tcp.<SITENAME>._sites.dc record
617 add_srv_record(samdb, forest_container_dn, "DC=_ldap._tcp.%s._sites.dc" %
618 site, fqdn_hostname, 389)
620 # DC=_ldap._tcp.<SITENAME>._sites.gc record
621 add_srv_record(samdb, forest_container_dn, "DC=_ldap._tcp.%s._sites.gc" %
622 site, fqdn_hostname, 3268)
624 # DC=_ldap._tcp.gc record
625 add_srv_record(samdb, forest_container_dn, "DC=_ldap._tcp.gc",
628 # DC=_ldap._tcp.pdc record
629 add_srv_record(samdb, forest_container_dn, "DC=_ldap._tcp.pdc",
633 add_host_record(samdb, forest_container_dn, "DC=gc", hostip, hostip6)
635 # DC=_ldap._tcp.<DOMAINGUID>.domains record
636 add_srv_record(samdb, forest_container_dn,
637 "DC=_ldap._tcp.%s.domains" % domainguid, fqdn_hostname, 389)
640 add_cname_record(samdb, forest_container_dn, "DC=%s" % ntdsguid,
644 def secretsdb_setup_dns(secretsdb, names, private_dir, realm,
645 dnsdomain, dns_keytab_path, dnspass, key_version_number):
646 """Add DNS specific bits to a secrets database.
648 :param secretsdb: Ldb Handle to the secrets database
649 :param names: Names shortcut
650 :param machinepass: Machine password
653 os.unlink(os.path.join(private_dir, dns_keytab_path))
657 if key_version_number is None:
658 key_version_number = 1
660 setup_ldb(secretsdb, setup_path("secrets_dns.ldif"), {
662 "DNSDOMAIN": dnsdomain,
663 "DNS_KEYTAB": dns_keytab_path,
664 "DNSPASS_B64": b64encode(dnspass),
665 "KEY_VERSION_NUMBER": str(key_version_number),
666 "HOSTNAME": names.hostname,
667 "DNSNAME" : '%s.%s' % (
668 names.netbiosname.lower(), names.dnsdomain.lower())
672 def create_dns_dir(logger, paths):
673 """Write out a DNS zone file, from the info in the current database.
675 :param logger: Logger object
676 :param paths: paths object
678 dns_dir = os.path.dirname(paths.dns)
681 shutil.rmtree(dns_dir, True)
685 os.mkdir(dns_dir, 0770)
687 if paths.bind_gid is not None:
689 os.chown(dns_dir, -1, paths.bind_gid)
690 # chmod needed to cope with umask
691 os.chmod(dns_dir, 0770)
693 if not os.environ.has_key('SAMBA_SELFTEST'):
694 logger.error("Failed to chown %s to bind gid %u" % (
695 dns_dir, paths.bind_gid))
698 def create_zone_file(lp, logger, paths, targetdir, dnsdomain,
699 hostip, hostip6, hostname, realm, domainguid,
701 """Write out a DNS zone file, from the info in the current database.
703 :param paths: paths object
704 :param dnsdomain: DNS Domain name
705 :param domaindn: DN of the Domain
706 :param hostip: Local IPv4 IP
707 :param hostip6: Local IPv6 IP
708 :param hostname: Local hostname
709 :param realm: Realm name
710 :param domainguid: GUID of the domain.
711 :param ntdsguid: GUID of the hosts nTDSDSA record.
713 assert isinstance(domainguid, str)
715 if hostip6 is not None:
716 hostip6_base_line = " IN AAAA " + hostip6
717 hostip6_host_line = hostname + " IN AAAA " + hostip6
718 gc_msdcs_ip6_line = "gc._msdcs IN AAAA " + hostip6
720 hostip6_base_line = ""
721 hostip6_host_line = ""
722 gc_msdcs_ip6_line = ""
724 if hostip is not None:
725 hostip_base_line = " IN A " + hostip
726 hostip_host_line = hostname + " IN A " + hostip
727 gc_msdcs_ip_line = "gc._msdcs IN A " + hostip
729 hostip_base_line = ""
730 hostip_host_line = ""
731 gc_msdcs_ip_line = ""
733 # we need to freeze the zone while we update the contents
734 if targetdir is None:
735 rndc = ' '.join(lp.get("rndc command"))
736 os.system(rndc + " freeze " + lp.get("realm"))
738 setup_file(setup_path("provision.zone"), paths.dns, {
739 "HOSTNAME": hostname,
740 "DNSDOMAIN": dnsdomain,
742 "HOSTIP_BASE_LINE": hostip_base_line,
743 "HOSTIP_HOST_LINE": hostip_host_line,
744 "DOMAINGUID": domainguid,
745 "DATESTRING": time.strftime("%Y%m%d%H"),
747 "NTDSGUID": ntdsguid,
748 "HOSTIP6_BASE_LINE": hostip6_base_line,
749 "HOSTIP6_HOST_LINE": hostip6_host_line,
750 "GC_MSDCS_IP_LINE": gc_msdcs_ip_line,
751 "GC_MSDCS_IP6_LINE": gc_msdcs_ip6_line,
754 if paths.bind_gid is not None:
756 os.chown(paths.dns, -1, paths.bind_gid)
757 # chmod needed to cope with umask
758 os.chmod(paths.dns, 0664)
760 if not os.environ.has_key('SAMBA_SELFTEST'):
761 logger.error("Failed to chown %s to bind gid %u" % (
762 paths.dns, paths.bind_gid))
764 if targetdir is None:
765 os.system(rndc + " unfreeze " + lp.get("realm"))
768 def create_samdb_copy(samdb, logger, paths, names, domainsid, domainguid):
769 """Create a copy of samdb and give write permissions to named for dns partitions
771 private_dir = paths.private_dir
772 samldb_dir = os.path.join(private_dir, "sam.ldb.d")
773 dns_dir = os.path.dirname(paths.dns)
774 dns_samldb_dir = os.path.join(dns_dir, "sam.ldb.d")
776 # Find the partitions and corresponding filenames
778 res = samdb.search(base="@PARTITION", scope=ldb.SCOPE_BASE, attrs=["partition"])
779 for tmp in res[0]["partition"]:
780 (nc, fname) = tmp.split(':')
781 partfile[nc.upper()] = fname
783 # Create empty domain partition
784 domaindn = names.domaindn.upper()
785 domainpart_file = os.path.join(dns_dir, partfile[domaindn])
787 os.mkdir(dns_samldb_dir)
788 file(domainpart_file, 'w').close()
790 # Fill the basedn and @OPTION records in domain partition
791 dom_ldb = samba.Ldb(domainpart_file)
792 domainguid_line = "objectGUID: %s\n-" % domainguid
793 descr = b64encode(get_domain_descriptor(domainsid))
794 setup_add_ldif(dom_ldb, setup_path("provision_basedn.ldif"), {
795 "DOMAINDN" : names.domaindn,
796 "DOMAINGUID" : domainguid_line,
797 "DOMAINSID" : str(domainsid),
798 "DESCRIPTOR" : descr})
799 setup_add_ldif(dom_ldb,
800 setup_path("provision_basedn_options.ldif"), None)
803 "Failed to setup database for BIND, AD based DNS cannot be used")
805 del partfile[domaindn]
807 # Link dns partitions and metadata
808 domainzonedn = "DC=DOMAINDNSZONES,%s" % names.domaindn.upper()
809 forestzonedn = "DC=FORESTDNSZONES,%s" % names.rootdn.upper()
810 domainzone_file = partfile[domainzonedn]
811 forestzone_file = partfile[forestzonedn]
812 metadata_file = "metadata.tdb"
814 os.link(os.path.join(samldb_dir, metadata_file),
815 os.path.join(dns_samldb_dir, metadata_file))
816 os.link(os.path.join(private_dir, domainzone_file),
817 os.path.join(dns_dir, domainzone_file))
818 os.link(os.path.join(private_dir, forestzone_file),
819 os.path.join(dns_dir, forestzone_file))
822 "Failed to setup database for BIND, AD based DNS cannot be used")
824 del partfile[domainzonedn]
825 del partfile[forestzonedn]
827 # Copy root, config, schema partitions (and any other if any)
828 # Since samdb is open in the current process, copy them in a child process
830 tdb_copy(os.path.join(private_dir, "sam.ldb"),
831 os.path.join(dns_dir, "sam.ldb"))
834 tdb_copy(os.path.join(private_dir, pfile),
835 os.path.join(dns_dir, pfile))
838 "Failed to setup database for BIND, AD based DNS cannot be used")
841 # Give bind read/write permissions dns partitions
842 if paths.bind_gid is not None:
844 os.chown(samldb_dir, -1, paths.bind_gid)
845 os.chmod(samldb_dir, 0750)
847 for dirname, dirs, files in os.walk(dns_dir):
849 dpath = os.path.join(dirname, d)
850 os.chown(dpath, -1, paths.bind_gid)
851 os.chmod(dpath, 0770)
853 if f.endswith('.ldb') or f.endswith('.tdb'):
854 fpath = os.path.join(dirname, f)
855 os.chown(fpath, -1, paths.bind_gid)
856 os.chmod(fpath, 0660)
858 if not os.environ.has_key('SAMBA_SELFTEST'):
860 "Failed to set permissions to sam.ldb* files, fix manually")
862 if not os.environ.has_key('SAMBA_SELFTEST'):
863 logger.warning("""Unable to find group id for BIND,
864 set permissions to sam.ldb* files manually""")
867 def create_dns_update_list(lp, logger, paths):
868 """Write out a dns_update_list file"""
869 # note that we use no variable substitution on this file
870 # the substitution is done at runtime by samba_dnsupdate, samba_spnupdate
871 setup_file(setup_path("dns_update_list"), paths.dns_update_list, None)
872 setup_file(setup_path("spn_update_list"), paths.spn_update_list, None)
875 def create_named_conf(paths, realm, dnsdomain, dns_backend, logger):
876 """Write out a file containing zone statements suitable for inclusion in a
877 named.conf file (including GSS-TSIG configuration).
879 :param paths: all paths
880 :param realm: Realm name
881 :param dnsdomain: DNS Domain name
882 :param dns_backend: DNS backend type
883 :param keytab_name: File name of DNS keytab file
884 :param logger: Logger object
887 # TODO: This really should have been done as a top level import.
888 # It is done here to avoid a depencency loop. That is, we move
889 # ProvisioningError to another file, and have all the provision
890 # scripts import it from there.
892 from samba.provision import ProvisioningError
894 if dns_backend == "BIND9_FLATFILE":
895 setup_file(setup_path("named.conf"), paths.namedconf, {
896 "DNSDOMAIN": dnsdomain,
898 "ZONE_FILE": paths.dns,
899 "REALM_WC": "*." + ".".join(realm.split(".")[1:]),
900 "NAMED_CONF": paths.namedconf,
901 "NAMED_CONF_UPDATE": paths.namedconf_update
904 setup_file(setup_path("named.conf.update"), paths.namedconf_update)
906 elif dns_backend == "BIND9_DLZ":
907 bind_info = subprocess.Popen(['named -V'], shell=True,
908 stdout=subprocess.PIPE,
909 stderr=subprocess.STDOUT,
910 cwd='.').communicate()[0]
913 if bind_info.upper().find('BIND 9.8') != -1:
915 elif bind_info.upper().find('BIND 9.9') != -1:
917 elif bind_info.upper().find('BIND 9.7') != -1:
918 raise ProvisioningError("DLZ option incompatible with BIND 9.7.")
920 logger.warning("BIND version unknown, please modify %s manually." % paths.namedconf)
921 setup_file(setup_path("named.conf.dlz"), paths.namedconf, {
922 "NAMED_CONF": paths.namedconf,
923 "MODULESDIR" : samba.param.modules_dir(),
929 def create_named_txt(path, realm, dnsdomain, dnsname, private_dir,
931 """Write out a file containing zone statements suitable for inclusion in a
932 named.conf file (including GSS-TSIG configuration).
934 :param path: Path of the new named.conf file.
935 :param realm: Realm name
936 :param dnsdomain: DNS Domain name
937 :param private_dir: Path to private directory
938 :param keytab_name: File name of DNS keytab file
940 setup_file(setup_path("named.txt"), path, {
941 "DNSDOMAIN": dnsdomain,
944 "DNS_KEYTAB": keytab_name,
945 "DNS_KEYTAB_ABS": os.path.join(private_dir, keytab_name),
946 "PRIVATE_DIR": private_dir
950 def is_valid_dns_backend(dns_backend):
951 return dns_backend in ("BIND9_FLATFILE", "BIND9_DLZ", "SAMBA_INTERNAL", "NONE")
954 def is_valid_os_level(os_level):
955 return DS_DOMAIN_FUNCTION_2000 <= os_level <= DS_DOMAIN_FUNCTION_2008_R2
958 def create_dns_legacy(samdb, domainsid, forestdn, dnsadmins_sid):
959 # Set up MicrosoftDNS container
960 add_dns_container(samdb, forestdn, "CN=System", domainsid, dnsadmins_sid)
962 add_rootservers(samdb, forestdn, "CN=System")
965 def fill_dns_data_legacy(samdb, domainsid, forestdn, dnsdomain, site, hostname,
966 hostip, hostip6, dnsadmins_sid):
968 add_domain_record(samdb, forestdn, "CN=System", dnsdomain, domainsid,
971 # Add DNS records for a DC in domain
972 add_dc_domain_records(samdb, forestdn, "CN=System", site, dnsdomain,
973 hostname, hostip, hostip6)
976 def create_dns_partitions(samdb, domainsid, names, domaindn, forestdn,
977 dnsadmins_sid, fill_level):
978 # Set up additional partitions (DomainDnsZones, ForstDnsZones)
979 setup_dns_partitions(samdb, domainsid, domaindn, forestdn,
980 names.configdn, names.serverdn, fill_level)
982 # Set up MicrosoftDNS containers
983 add_dns_container(samdb, domaindn, "DC=DomainDnsZones", domainsid,
985 if fill_level != FILL_SUBDOMAIN:
986 add_dns_container(samdb, forestdn, "DC=ForestDnsZones", domainsid,
987 dnsadmins_sid, forest=True)
990 def fill_dns_data_partitions(samdb, domainsid, site, domaindn, forestdn,
991 dnsdomain, dnsforest, hostname, hostip, hostip6,
992 domainguid, ntdsguid, dnsadmins_sid, autofill=True,
993 fill_level=FILL_FULL):
994 """Fill data in various AD partitions
996 :param samdb: LDB object connected to sam.ldb file
997 :param domainsid: Domain SID (as dom_sid object)
998 :param site: Site name to create hostnames in
999 :param domaindn: DN of the domain
1000 :param forestdn: DN of the forest
1001 :param dnsdomain: DNS name of the domain
1002 :param dnsforest: DNS name of the forest
1003 :param hostname: Host name of this DC
1004 :param hostip: IPv4 addresses
1005 :param hostip6: IPv6 addresses
1006 :param domainguid: Domain GUID
1007 :param ntdsguid: NTDS GUID
1008 :param dnsadmins_sid: SID for DnsAdmins group
1009 :param autofill: Create DNS records (using fixed template)
1012 ##### Set up DC=DomainDnsZones,<DOMAINDN>
1013 # Add rootserver records
1014 add_rootservers(samdb, domaindn, "DC=DomainDnsZones")
1017 add_domain_record(samdb, domaindn, "DC=DomainDnsZones", dnsdomain,
1018 domainsid, dnsadmins_sid)
1020 # Add DNS records for a DC in domain
1022 add_dc_domain_records(samdb, domaindn, "DC=DomainDnsZones", site,
1023 dnsdomain, hostname, hostip, hostip6)
1025 if fill_level != FILL_SUBDOMAIN:
1026 ##### Set up DC=ForestDnsZones,<FORESTDN>
1028 add_msdcs_record(samdb, forestdn, "DC=ForestDnsZones", dnsforest)
1030 # Add DNS records for a DC in forest
1032 add_dc_msdcs_records(samdb, forestdn, "DC=ForestDnsZones", site,
1033 dnsforest, hostname, hostip, hostip6,
1034 domainguid, ntdsguid)
1037 def setup_ad_dns(samdb, secretsdb, domainsid, names, paths, lp, logger,
1038 dns_backend, os_level, site, dnspass=None, hostip=None, hostip6=None,
1039 targetdir=None, fill_level=FILL_FULL):
1040 """Provision DNS information (assuming GC role)
1042 :param samdb: LDB object connected to sam.ldb file
1043 :param secretsdb: LDB object connected to secrets.ldb file
1044 :param domainsid: Domain SID (as dom_sid object)
1045 :param names: Names shortcut
1046 :param paths: Paths shortcut
1047 :param lp: Loadparm object
1048 :param logger: Logger object
1049 :param dns_backend: Type of DNS backend
1050 :param os_level: Functional level (treated as os level)
1051 :param site: Site to create hostnames in
1052 :param dnspass: Password for bind's DNS account
1053 :param hostip: IPv4 address
1054 :param hostip6: IPv6 address
1055 :param targetdir: Target directory for creating DNS-related files for BIND9
1058 if not is_valid_dns_backend(dns_backend):
1059 raise Exception("Invalid dns backend: %r" % dns_backend)
1061 if not is_valid_os_level(os_level):
1062 raise Exception("Invalid os level: %r" % os_level)
1064 if dns_backend == "NONE":
1065 logger.info("No DNS backend set, not configuring DNS")
1068 # Add dns accounts (DnsAdmins, DnsUpdateProxy) in domain
1069 logger.info("Adding DNS accounts")
1070 add_dns_accounts(samdb, names.domaindn)
1072 # If dns_backend is BIND9_FLATFILE
1073 # Populate only CN=MicrosoftDNS,CN=System,<DOMAINDN>
1075 # If dns_backend is SAMBA_INTERNAL or BIND9_DLZ
1076 # Populate DNS partitions
1078 # If os_level < 2003 (DS_DOMAIN_FUNCTION_2000)
1079 # All dns records are in CN=MicrosoftDNS,CN=System,<DOMAINDN>
1081 # If os_level >= 2003 (DS_DOMAIN_FUNCTION_2003, DS_DOMAIN_FUNCTION_2008,
1082 # DS_DOMAIN_FUNCTION_2008_R2)
1083 # Root server records are in CN=MicrosoftDNS,CN=System,<DOMAINDN>
1084 # Domain records are in CN=MicrosoftDNS,CN=System,<DOMAINDN>
1085 # Domain records are in CN=MicrosoftDNS,DC=DomainDnsZones,<DOMAINDN>
1086 # Forest records are in CN=MicrosoftDNS,DC=ForestDnsZones,<FORESTDN>
1087 domaindn = names.domaindn
1088 forestdn = samdb.get_root_basedn().get_linearized()
1090 dnsdomain = names.dnsdomain.lower()
1091 dnsforest = dnsdomain
1093 hostname = names.netbiosname.lower()
1095 dnsadmins_sid = get_dnsadmins_sid(samdb, domaindn)
1096 domainguid = get_domainguid(samdb, domaindn)
1099 logger.info("Creating CN=MicrosoftDNS,CN=System,%s" % domaindn)
1100 create_dns_legacy(samdb, domainsid, domaindn, dnsadmins_sid)
1102 if os_level == DS_DOMAIN_FUNCTION_2000:
1103 # Populating legacy dns
1104 logger.info("Populating CN=MicrosoftDNS,CN=System,%s" % domaindn)
1105 fill_dns_data_legacy(samdb, domainsid, domaindn, dnsdomain, site,
1106 hostname, hostip, hostip6, dnsadmins_sid)
1108 elif dns_backend in ("SAMBA_INTERNAL", "BIND9_DLZ") and \
1109 os_level >= DS_DOMAIN_FUNCTION_2003:
1111 # Create DNS partitions
1112 logger.info("Creating DomainDnsZones and ForestDnsZones partitions")
1113 create_dns_partitions(samdb, domainsid, names, domaindn, forestdn,
1114 dnsadmins_sid, fill_level)
1116 # Populating dns partitions
1117 logger.info("Populating DomainDnsZones and ForestDnsZones partitions")
1118 fill_dns_data_partitions(samdb, domainsid, site, domaindn, forestdn,
1119 dnsdomain, dnsforest, hostname, hostip, hostip6,
1120 domainguid, names.ntdsguid, dnsadmins_sid,
1121 fill_level=fill_level)
1123 if dns_backend.startswith("BIND9_"):
1124 setup_bind9_dns(samdb, secretsdb, domainsid, names, paths, lp, logger,
1125 dns_backend, os_level, site=site, dnspass=dnspass, hostip=hostip,
1126 hostip6=hostip6, targetdir=targetdir)
1129 def setup_bind9_dns(samdb, secretsdb, domainsid, names, paths, lp, logger,
1130 dns_backend, os_level, site=None, dnspass=None, hostip=None,
1131 hostip6=None, targetdir=None, key_version_number=None):
1132 """Provision DNS information (assuming BIND9 backend in DC role)
1134 :param samdb: LDB object connected to sam.ldb file
1135 :param secretsdb: LDB object connected to secrets.ldb file
1136 :param domainsid: Domain SID (as dom_sid object)
1137 :param names: Names shortcut
1138 :param paths: Paths shortcut
1139 :param lp: Loadparm object
1140 :param logger: Logger object
1141 :param dns_backend: Type of DNS backend
1142 :param os_level: Functional level (treated as os level)
1143 :param site: Site to create hostnames in
1144 :param dnspass: Password for bind's DNS account
1145 :param hostip: IPv4 address
1146 :param hostip6: IPv6 address
1147 :param targetdir: Target directory for creating DNS-related files for BIND9
1150 if (not is_valid_dns_backend(dns_backend) or
1151 not dns_backend.startswith("BIND9_")):
1152 raise Exception("Invalid dns backend: %r" % dns_backend)
1154 if not is_valid_os_level(os_level):
1155 raise Exception("Invalid os level: %r" % os_level)
1157 domaindn = names.domaindn
1159 domainguid = get_domainguid(samdb, domaindn)
1161 secretsdb_setup_dns(secretsdb, names,
1162 paths.private_dir, realm=names.realm,
1163 dnsdomain=names.dnsdomain,
1164 dns_keytab_path=paths.dns_keytab, dnspass=dnspass,
1165 key_version_number=key_version_number)
1167 create_dns_dir(logger, paths)
1169 if dns_backend == "BIND9_FLATFILE":
1170 create_zone_file(lp, logger, paths, targetdir, site=site,
1171 dnsdomain=names.dnsdomain, hostip=hostip,
1172 hostip6=hostip6, hostname=names.hostname,
1173 realm=names.realm, domainguid=domainguid,
1174 ntdsguid=names.ntdsguid)
1176 if dns_backend == "BIND9_DLZ" and os_level >= DS_DOMAIN_FUNCTION_2003:
1177 create_samdb_copy(samdb, logger, paths, names, domainsid, domainguid)
1179 create_named_conf(paths, realm=names.realm,
1180 dnsdomain=names.dnsdomain, dns_backend=dns_backend,
1183 create_named_txt(paths.namedtxt,
1184 realm=names.realm, dnsdomain=names.dnsdomain,
1185 dnsname = "%s.%s" % (names.hostname, names.dnsdomain),
1186 private_dir=paths.private_dir,
1187 keytab_name=paths.dns_keytab)
1188 logger.info("See %s for an example configuration include file for BIND",
1190 logger.info("and %s for further documentation required for secure DNS "
1191 "updates", paths.namedtxt)