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s4-rodc: next step in RODC join code

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a RODC net join can now replicate the schame, config and base
partitions, by calling the net.replicate*() python hooks, and driving
the GetNCChanges calls from python

Pair-Programmed-With: Andrew Bartlett <abartlet@samba.org>
This commit is contained in:
Andrew Tridgell 2010-08-24 15:42:54 +10:00
parent 4cacdf0002
commit 495bd182f5
1 changed files with 213 additions and 121 deletions
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326
source4/scripting/python/samba/join.py
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@ -22,14 +22,21 @@ import samba.getopt as options
from samba.auth import system_session from samba.auth import system_session
from samba.samdb import SamDB from samba.samdb import SamDB
from samba import gensec from samba import gensec
import ldb, samba import ldb, samba, sys
from samba.ndr import ndr_pack, ndr_unpack, ndr_print from samba.ndr import ndr_pack, ndr_unpack, ndr_print
from samba.dcerpc import security from samba.dcerpc import security
from samba.dcerpc import drsuapi, misc, netlogon from samba.dcerpc import drsuapi, misc, netlogon
from samba.credentials import Credentials, DONT_USE_KERBEROS from samba.credentials import Credentials, DONT_USE_KERBEROS
from samba.provision import secretsdb_self_join from samba.provision import secretsdb_self_join, provision, FILL_DRS, find_setup_dir
from samba.net import Net
import logging
def join_rodc(server=None, creds=None, lp=None, site=None, netbios_name=None): class join_ctx:
'''hold join context variables'''
pass
def join_rodc(server=None, creds=None, lp=None, site=None, netbios_name=None,
targetdir=None):
"""join as a RODC""" """join as a RODC"""
if server is None: if server is None:
@ -42,19 +49,19 @@ def join_rodc(server=None, creds=None, lp=None, site=None, netbios_name=None):
except: except:
pass pass
def cleanup_old_join(samdb, acct_dn, server_dn, ntds_dn, def cleanup_old_join(ctx):
krbtgt_dn, connection_dn, topology_dn): '''remove any DNs from a previous join'''
try: try:
# find the krbtgt link # find the krbtgt link
res = samdb.search(base=acct_dn, scope=ldb.SCOPE_BASE, attrs=["msDS-krbTgtLink"]) res = ctx.samdb.search(base=ctx.acct_dn, scope=ldb.SCOPE_BASE, attrs=["msDS-krbTgtLink"])
del_noerror(samdb, acct_dn) del_noerror(ctx.samdb, ctx.acct_dn)
del_noerror(samdb, connection_dn) del_noerror(ctx.samdb, ctx.connection_dn)
del_noerror(samdb, krbtgt_dn) del_noerror(ctx.samdb, ctx.krbtgt_dn)
del_noerror(samdb, ntds_dn) del_noerror(ctx.samdb, ctx.ntds_dn)
del_noerror(samdb, server_dn) del_noerror(ctx.samdb, ctx.server_dn)
del_noerror(samdb, topology_dn) del_noerror(ctx.samdb, ctx.topology_dn)
new_krbtgt_dn = res[0]["msDS-Krbtgtlink"][0] ctx.new_krbtgt_dn = res[0]["msDS-Krbtgtlink"][0]
del_noerror(samdb, new_krbtgt_dn) del_noerror(ctx.samdb, ctx.new_krbtgt_dn)
except: except:
pass pass
@ -71,6 +78,11 @@ def join_rodc(server=None, creds=None, lp=None, site=None, netbios_name=None):
binsid = res[0]["tokenGroups"][0] binsid = res[0]["tokenGroups"][0]
return samdb.schema_format_value("objectSID", binsid) return samdb.schema_format_value("objectSID", binsid)
def get_domain_name(samdb):
# this should be done via CLDAP
res = samdb.search(base=samdb.get_default_basedn(), scope=ldb.SCOPE_BASE, attrs=["name"])
return res[0]["name"][0]
def do_DsBind(drs): def do_DsBind(drs):
'''make a DsBind call, returning the binding handle''' '''make a DsBind call, returning the binding handle'''
bind_info = drsuapi.DsBindInfoCtr() bind_info = drsuapi.DsBindInfoCtr()
@ -107,183 +119,263 @@ def join_rodc(server=None, creds=None, lp=None, site=None, netbios_name=None):
(info, handle) = drs.DsBind(misc.GUID(drsuapi.DRSUAPI_DS_BIND_GUID), bind_info) (info, handle) = drs.DsBind(misc.GUID(drsuapi.DRSUAPI_DS_BIND_GUID), bind_info)
return handle return handle
def replicate_partition(ctx, dn, schema=False):
'''replicate a partition'''
creds.set_gensec_features(creds.get_gensec_features() | gensec.FEATURE_SEAL) # setup for a GetNCChanges call
req8 = drsuapi.DsGetNCChangesRequest8()
samdb = SamDB(url="ldap://%s" % server, exop = drsuapi.DRSUAPI_EXOP_NONE
null_guid = misc.GUID()
req8.destination_dsa_guid = misc.GUID("9c637462-5b8c-4467-aef2-bdb1f57bc4ef")
req8.source_dsa_invocation_id = misc.GUID(ctx.samdb.get_invocation_id())
req8.naming_context = drsuapi.DsReplicaObjectIdentifier()
req8.naming_context.dn = dn.decode("utf-8")
req8.highwatermark = drsuapi.DsReplicaHighWaterMark()
req8.highwatermark.tmp_highest_usn = 0
req8.highwatermark.reserved_usn = 0
req8.highwatermark.highest_usn = 0
req8.uptodateness_vector = None
req8.replica_flags = 0
req8.replica_flags |= (drsuapi.DRSUAPI_DRS_INIT_SYNC |
drsuapi.DRSUAPI_DRS_PER_SYNC |
drsuapi.DRSUAPI_DRS_GET_ANC |
drsuapi.DRSUAPI_DRS_NEVER_SYNCED)
req8.max_object_count = 402
req8.max_ndr_size = 402116
req8.extended_op = exop
req8.fsmo_info = 0
req8.partial_attribute_set = None
req8.partial_attribute_set_ex = None
req8.mapping_ctr.num_mappings = 0
req8.mapping_ctr.mappings = None
while True:
(level, ctr) = ctx.drs.DsGetNCChanges(ctx.drs_handle, 8, req8)
net.replicate_chunk(ctx.replication_state, level, ctr, schema=schema)
if ctr.more_data == 0:
break
req8.highwatermark.tmp_highest_usn = ctr.new_highwatermark.tmp_highest_usn
# main join code
ctx = join_ctx()
ctx.creds = creds
ctx.lp = lp
ctx.site = site
ctx.netbios_name = netbios_name
ctx.targetdir = targetdir
ctx.server = server
ctx.creds.set_gensec_features(creds.get_gensec_features() | gensec.FEATURE_SEAL)
ctx.samdb = SamDB(url="ldap://%s" % ctx.server,
session_info=system_session(), session_info=system_session(),
credentials=creds, lp=lp) credentials=ctx.creds, lp=ctx.lp)
myname = netbios_name ctx.myname = netbios_name
samname = "%s$" % myname ctx.samname = "%s$" % ctx.myname
base_dn = str(samdb.get_default_basedn()) ctx.base_dn = str(ctx.samdb.get_default_basedn())
domsid = samdb.get_domain_sid() ctx.root_dn = str(ctx.samdb.get_root_basedn())
dc_ntds_dn = get_dsServiceName(samdb) ctx.schema_dn = str(ctx.samdb.get_schema_basedn())
dc_dnsHostName = get_dnsHostName(samdb) ctx.config_dn = str(ctx.samdb.get_config_basedn())
acct_pass = samba.generate_random_password(12, 32) ctx.domsid = ctx.samdb.get_domain_sid()
mysid = get_mysid(samdb)
ctx.dc_ntds_dn = get_dsServiceName(ctx.samdb)
ctx.dc_dnsHostName = get_dnsHostName(ctx.samdb)
ctx.acct_pass = samba.generate_random_password(12, 32)
ctx.mysid = get_mysid(ctx.samdb)
# work out the DNs of all the objects we will be adding # work out the DNs of all the objects we will be adding
admin_dn = "<SID=%s>" % mysid ctx.admin_dn = "<SID=%s>" % ctx.mysid
krbtgt_dn = "CN=krbtgt_%s,CN=Users,%s" % (myname, base_dn) ctx.krbtgt_dn = "CN=krbtgt_%s,CN=Users,%s" % (ctx.myname, ctx.base_dn)
server_dn = "CN=%s,CN=Servers,CN=%s,CN=Sites,%s" % (myname, site, samdb.get_config_basedn()) ctx.server_dn = "CN=%s,CN=Servers,CN=%s,CN=Sites,%s" % (ctx.myname, ctx.site, ctx.config_dn)
ntds_dn = "CN=NTDS Settings,%s" % server_dn ctx.ntds_dn = "CN=NTDS Settings,%s" % ctx.server_dn
connection_dn = "CN=RODC Connection (FRS),%s" % ntds_dn ctx.connection_dn = "CN=RODC Connection (FRS),%s" % ctx.ntds_dn
topology_dn = "CN=%s,CN=Topology,CN=Domain System Volume,CN=DFSR-GlobalSettings,CN=System,%s" % (myname, base_dn) ctx.topology_dn = "CN=%s,CN=Topology,CN=Domain System Volume,CN=DFSR-GlobalSettings,CN=System,%s" % (ctx.myname, ctx.base_dn)
never_reveal_sid = "%s-572" % domsid; # we should lookup these SIDs, and have far more never reveal SIDs
reveal_sid = "%s-571" % domsid; ctx.never_reveal_sid = "%s-572" % ctx.domsid;
ctx.reveal_sid = "%s-571" % ctx.domsid;
dnsdomain = ldb.Dn(samdb, base_dn).canonical_str().split('/')[0] ctx.dnsdomain = ldb.Dn(ctx.samdb, ctx.base_dn).canonical_str().split('/')[0]
dnshostname = "%s.%s" % (myname, dnsdomain) ctx.realm = ctx.dnsdomain
ctx.dnshostname = "%s.%s" % (ctx.myname, ctx.dnsdomain)
acct_dn = "CN=%s,OU=Domain Controllers,%s" % (myname, base_dn) ctx.acct_dn = "CN=%s,OU=Domain Controllers,%s" % (ctx.myname, ctx.base_dn)
cleanup_old_join(samdb, acct_dn, server_dn, ntds_dn, cleanup_old_join(ctx)
krbtgt_dn, connection_dn, topology_dn)
print "Adding %s" % acct_dn print "Adding %s" % ctx.acct_dn
rec = { rec = {
"dn" : acct_dn, "dn" : ctx.acct_dn,
"objectClass": "computer", "objectClass": "computer",
"displayname": samname, "displayname": ctx.samname,
"samaccountname" : samname, "samaccountname" : ctx.samname,
"useraccountcontrol" : "83890176", "useraccountcontrol" : "83890176",
"managedby" : admin_dn, "managedby" : ctx.admin_dn,
"dnshostname" : dnshostname, "dnshostname" : ctx.dnshostname,
"msDS-NeverRevealGroup" : "<SID=%s>" % never_reveal_sid, "msDS-NeverRevealGroup" : "<SID=%s>" % ctx.never_reveal_sid,
"msDS-RevealOnDemandGroup" : "<SID=%s>" % reveal_sid} "msDS-RevealOnDemandGroup" : "<SID=%s>" % ctx.reveal_sid}
samdb.add(rec) ctx.samdb.add(rec)
print "Adding %s" % krbtgt_dn print "Adding %s" % ctx.krbtgt_dn
rec = { rec = {
"dn" : krbtgt_dn, "dn" : ctx.krbtgt_dn,
"objectclass" : "user", "objectclass" : "user",
"useraccountcontrol" : "514", "useraccountcontrol" : "514",
"showinadvancedviewonly" : "TRUE", "showinadvancedviewonly" : "TRUE",
"description" : "tricky account"} "description" : "tricky account"}
samdb.add(rec, ["rodc_join:1:1"]) ctx.samdb.add(rec, ["rodc_join:1:1"])
# now we need to search for the samAccountName attribute on the krbtgt DN, # now we need to search for the samAccountName attribute on the krbtgt DN,
# as this will have been magically set to the krbtgt number # as this will have been magically set to the krbtgt number
res = samdb.search(base=krbtgt_dn, scope=ldb.SCOPE_BASE, attrs=["samAccountName"]) res = ctx.samdb.search(base=ctx.krbtgt_dn, scope=ldb.SCOPE_BASE, attrs=["samAccountName"])
krbtgt_name = res[0]["samAccountName"][0] ctx.krbtgt_name = res[0]["samAccountName"][0]
print "Got krbtgt_name=%s" % krbtgt_name print "Got krbtgt_name=%s" % ctx.krbtgt_name
m = ldb.Message() m = ldb.Message()
m.dn = ldb.Dn(samdb, acct_dn) m.dn = ldb.Dn(ctx.samdb, ctx.acct_dn)
m["msDS-krbTgtLink"] = ldb.MessageElement(krbtgt_dn, m["msDS-krbTgtLink"] = ldb.MessageElement(ctx.krbtgt_dn,
ldb.FLAG_MOD_REPLACE, "msDS-krbTgtLink") ldb.FLAG_MOD_REPLACE, "msDS-krbTgtLink")
samdb.modify(m) ctx.samdb.modify(m)
new_krbtgt_dn = "CN=%s,CN=Users,%s" % (krbtgt_name, base_dn) ctx.new_krbtgt_dn = "CN=%s,CN=Users,%s" % (ctx.krbtgt_name, ctx.base_dn)
print "Renaming %s to %s" % (krbtgt_dn, new_krbtgt_dn) print "Renaming %s to %s" % (ctx.krbtgt_dn, ctx.new_krbtgt_dn)
samdb.rename(krbtgt_dn, new_krbtgt_dn) ctx.samdb.rename(ctx.krbtgt_dn, ctx.new_krbtgt_dn)
print "Adding %s" % server_dn print "Adding %s" % ctx.server_dn
rec = { rec = {
"dn": server_dn, "dn": ctx.server_dn,
"objectclass" : "server", "objectclass" : "server",
"systemFlags" : "1375731712", "systemFlags" : "1375731712",
"serverReference" : acct_dn, "serverReference" : ctx.acct_dn,
"dnsHostName" : dnshostname} "dnsHostName" : ctx.dnshostname}
samdb.add(rec) ctx.samdb.add(rec)
print "Adding %s" % ntds_dn print "Adding %s" % ctx.ntds_dn
rec = { rec = {
"dn" : ntds_dn, "dn" : ctx.ntds_dn,
"objectclass" : "nTDSDSA", "objectclass" : "nTDSDSA",
"objectCategory" : "CN=NTDS-DSA-RO,%s" % samdb.get_schema_basedn(), "objectCategory" : "CN=NTDS-DSA-RO,%s" % ctx.schema_dn,
"systemFlags" : "33554432", "systemFlags" : "33554432",
"dMDLocation" : str(samdb.get_schema_basedn()), "dMDLocation" : ctx.schema_dn,
"options" : "37", "options" : "37",
"msDS-Behavior-Version" : "4", "msDS-Behavior-Version" : "4",
"msDS-HasDomainNCs" : str(samdb.get_default_basedn()), "msDS-HasDomainNCs" : ctx.base_dn,
"msDS-HasFullReplicaNCs" : [ str(samdb.get_default_basedn()), "msDS-HasFullReplicaNCs" : [ ctx.base_dn, ctx.config_dn, ctx.schema_dn ]}
str(samdb.get_config_basedn()), ctx.samdb.add(rec, ["rodc_join:1:1"])
str(samdb.get_schema_basedn()) ]}
samdb.add(rec, ["rodc_join:1:1"])
print "Adding %s" % connection_dn print "Adding %s" % ctx.connection_dn
rec = { rec = {
"dn" : connection_dn, "dn" : ctx.connection_dn,
"objectclass" : "nTDSConnection", "objectclass" : "nTDSConnection",
"enabledconnection" : "TRUE", "enabledconnection" : "TRUE",
"options" : "65", "options" : "65",
"fromServer" : dc_ntds_dn} "fromServer" : ctx.dc_ntds_dn}
samdb.add(rec) ctx.samdb.add(rec)
print "Adding %s" % topology_dn print "Adding %s" % ctx.topology_dn
rec = { rec = {
"dn" : topology_dn, "dn" : ctx.topology_dn,
"objectclass" : "msDFSR-Member", "objectclass" : "msDFSR-Member",
"msDFSR-ComputerReference" : acct_dn, "msDFSR-ComputerReference" : ctx.acct_dn,
"serverReference" : ntds_dn} "serverReference" : ctx.ntds_dn}
samdb.add(rec) ctx.samdb.add(rec)
print "Adding HOST SPNs to %s" % acct_dn print "Adding HOST SPNs to %s" % ctx.acct_dn
m = ldb.Message() m = ldb.Message()
m.dn = ldb.Dn(samdb, acct_dn) m.dn = ldb.Dn(ctx.samdb, ctx.acct_dn)
SPNs = [ "HOST/%s" % myname, SPNs = [ "HOST/%s" % ctx.myname,
"HOST/%s" % dnshostname ] "HOST/%s" % ctx.dnshostname ]
m["servicePrincipalName"] = ldb.MessageElement(SPNs, m["servicePrincipalName"] = ldb.MessageElement(SPNs,
ldb.FLAG_MOD_ADD, ldb.FLAG_MOD_ADD,
"servicePrincipalName") "servicePrincipalName")
samdb.modify(m) ctx.samdb.modify(m)
print "Adding RestrictedKrbHost SPNs to %s" % acct_dn print "Adding RestrictedKrbHost SPNs to %s" % ctx.acct_dn
m = ldb.Message() m = ldb.Message()
m.dn = ldb.Dn(samdb, acct_dn) m.dn = ldb.Dn(ctx.samdb, ctx.acct_dn)
SPNs = [ "RestrictedKrbHost/%s" % myname, SPNs = [ "RestrictedKrbHost/%s" % ctx.myname,
"RestrictedKrbHost/%s" % dnshostname ] "RestrictedKrbHost/%s" % ctx.dnshostname ]
m["servicePrincipalName"] = ldb.MessageElement(SPNs, m["servicePrincipalName"] = ldb.MessageElement(SPNs,
ldb.FLAG_MOD_ADD, ldb.FLAG_MOD_ADD,
"servicePrincipalName") "servicePrincipalName")
samdb.modify(m) ctx.samdb.modify(m)
print "Setting account password for %s" % samname print "Setting account password for %s" % ctx.samname
samdb.setpassword("(&(objectClass=user)(sAMAccountName=%s))" % samname, ctx.samdb.setpassword("(&(objectClass=user)(sAMAccountName=%s))" % ctx.samname,
acct_pass, ctx.acct_pass,
force_change_at_next_login=False, force_change_at_next_login=False,
username=samname) username=ctx.samname)
print "Enabling account %s" % acct_dn print "Enabling account %s" % ctx.acct_dn
# weird, its already enabled, but w2k8r2 disables then re-enables again # weird, its already enabled, but w2k8r2 disables then re-enables again
m = ldb.Message() m = ldb.Message()
m.dn = ldb.Dn(samdb, acct_dn) m.dn = ldb.Dn(ctx.samdb, ctx.acct_dn)
m["userAccountControl"] = ldb.MessageElement("83890178", m["userAccountControl"] = ldb.MessageElement("83890178",
ldb.FLAG_MOD_REPLACE, ldb.FLAG_MOD_REPLACE,
"userAccountControl") "userAccountControl")
samdb.modify(m) ctx.samdb.modify(m)
m["userAccountControl"] = ldb.MessageElement("83890176", m["userAccountControl"] = ldb.MessageElement("83890176",
ldb.FLAG_MOD_REPLACE, ldb.FLAG_MOD_REPLACE,
"userAccountControl") "userAccountControl")
samdb.modify(m) ctx.samdb.modify(m)
print "Doing DsBind as %s" % samname print "Doing DsBind as %s" % ctx.samname
acct_creds = Credentials() ctx.acct_creds = Credentials()
acct_creds.guess(lp) ctx.acct_creds.guess(ctx.lp)
acct_creds.set_kerberos_state(DONT_USE_KERBEROS) ctx.acct_creds.set_kerberos_state(DONT_USE_KERBEROS)
acct_creds.set_username(samname) ctx.acct_creds.set_username(ctx.samname)
acct_creds.set_password(acct_pass) ctx.acct_creds.set_password(ctx.acct_pass)
drs = drsuapi.drsuapi("ncacn_ip_tcp:w2k8[seal,print]", lp, acct_creds) ctx.drs = drsuapi.drsuapi("ncacn_ip_tcp:%s[seal,print]" % ctx.server, ctx.lp, ctx.creds)
drs_handle = do_DsBind(drs) ctx.drs_handle = do_DsBind(ctx.drs)
print "DRS Handle: %s" % drs_handle print "DRS Handle: %s" % ctx.drs_handle
print "Calling DsRGetDCNameEx2" print "Calling DsRGetDCNameEx2"
netr = netlogon.netlogon("ncacn_np:w2k8[print]", lp, acct_creds) netr = netlogon.netlogon("ncacn_np:%s[print]" % ctx.server, ctx.lp, ctx.acct_creds)
dcname = netr.netr_DsRGetDCNameEx2(server_unc=dc_dnsHostName.decode("utf-8"), dcname = netr.netr_DsRGetDCNameEx2(server_unc=ctx.dc_dnsHostName.decode("utf-8"),
client_account=None, client_account=None,
mask=0, mask=0,
domain_name=dnsdomain.decode("utf-8"), domain_name=ctx.dnsdomain.decode("utf-8"),
domain_guid=None, site_name=None, flags=0x40001020) domain_guid=None, site_name=None,
flags=0x40001020)
print "Calling secrets self join" print ndr_print(dcname)
secretsdb_self_join() print "Calling bare provision"
print "Note: RODC join is a work in progress - replication not done" setup_dir = find_setup_dir()
#print ndr_print(dcname) logger = logging.getLogger("provision")
logger.addHandler(logging.StreamHandler(sys.stdout))
smbconf = lp.configfile
presult = provision(setup_dir, logger, system_session(), None,
smbconf=smbconf, targetdir=targetdir, samdb_fill=FILL_DRS,
realm=ctx.realm, rootdn=ctx.root_dn, domaindn=ctx.base_dn,
schemadn=ctx.schema_dn,
configdn=ctx.config_dn,
serverdn=ctx.server_dn, domain=get_domain_name(ctx.samdb),
hostname=ctx.myname, hostip="127.0.0.1", domainsid=ctx.domsid,
machinepass=ctx.acct_pass, serverrole="domain controller",
sitename=ctx.site)
print "Provision OK for domain DN %s" % presult.domaindn
ctx.local_samdb = presult.samdb
ctx.lp = presult.lp
print "Starting replication"
ctx.local_samdb.transaction_start()
net = Net(creds=ctx.creds, lp=ctx.lp)
ctx.replication_state = net.replicate_init(ctx.local_samdb, ctx.lp, ctx.drs)
replicate_partition(ctx, ctx.schema_dn, schema=True)
replicate_partition(ctx, ctx.config_dn)
replicate_partition(ctx, ctx.base_dn)
print "Committing"
ctx.local_samdb.transaction_commit()