Current File : //lib/python3/dist-packages/samba/dbchecker.py
# Samba4 AD database checker
#
# Copyright (C) Andrew Tridgell 2011
# Copyright (C) Matthieu Patou <mat@matws.net> 2011
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
import ldb
import samba
import time
from base64 import b64decode
from samba import dsdb
from samba import common
from samba.dcerpc import misc
from samba.dcerpc import drsuapi
from samba.ndr import ndr_unpack, ndr_pack
from samba.dcerpc import drsblobs
from samba.samdb import dsdb_Dn
from samba.dcerpc import security
from samba.descriptor import get_wellknown_sds, get_diff_sds
from samba.auth import system_session, admin_session
from samba.netcmd import CommandError
from samba.netcmd.fsmo import get_fsmo_roleowner
def dump_attr_values(vals):
"""Stringify a value list, using utf-8 if possible (which some tests
want), or the python bytes representation otherwise (with leading
'b' and escapes like b'\x00').
"""
result = []
for value in vals:
try:
result.append(value.decode('utf-8'))
except UnicodeDecodeError:
result.append(repr(value))
return ','.join(result)
class dbcheck(object):
"""check a SAM database for errors"""
def __init__(self, samdb, samdb_schema=None, verbose=False, fix=False,
yes=False, quiet=False, in_transaction=False,
quick_membership_checks=False,
reset_well_known_acls=False,
check_expired_tombstones=False):
self.samdb = samdb
self.dict_oid_name = None
self.samdb_schema = (samdb_schema or samdb)
self.verbose = verbose
self.fix = fix
self.yes = yes
self.quiet = quiet
self.remove_all_unknown_attributes = False
self.remove_all_empty_attributes = False
self.fix_all_normalisation = False
self.fix_all_duplicates = False
self.fix_all_DN_GUIDs = False
self.fix_all_binary_dn = False
self.remove_implausible_deleted_DN_links = False
self.remove_plausible_deleted_DN_links = False
self.fix_all_string_dn_component_mismatch = False
self.fix_all_GUID_dn_component_mismatch = False
self.fix_all_SID_dn_component_mismatch = False
self.fix_all_SID_dn_component_missing = False
self.fix_all_old_dn_string_component_mismatch = False
self.fix_all_metadata = False
self.fix_time_metadata = False
self.fix_undead_linked_attributes = False
self.fix_all_missing_backlinks = False
self.fix_all_orphaned_backlinks = False
self.fix_all_missing_forward_links = False
self.duplicate_link_cache = dict()
self.recover_all_forward_links = False
self.fix_rmd_flags = False
self.fix_ntsecuritydescriptor = False
self.fix_ntsecuritydescriptor_owner_group = False
self.seize_fsmo_role = False
self.move_to_lost_and_found = False
self.fix_instancetype = False
self.fix_replmetadata_zero_invocationid = False
self.fix_replmetadata_duplicate_attid = False
self.fix_replmetadata_wrong_attid = False
self.fix_replmetadata_unsorted_attid = False
self.fix_deleted_deleted_objects = False
self.fix_dn = False
self.fix_base64_userparameters = False
self.fix_utf8_userparameters = False
self.fix_doubled_userparameters = False
self.fix_sid_rid_set_conflict = False
self.quick_membership_checks = quick_membership_checks
self.reset_well_known_acls = reset_well_known_acls
self.check_expired_tombstones = check_expired_tombstones
self.expired_tombstones = 0
self.reset_all_well_known_acls = False
self.in_transaction = in_transaction
self.infrastructure_dn = ldb.Dn(samdb, "CN=Infrastructure," + samdb.domain_dn())
self.naming_dn = ldb.Dn(samdb, "CN=Partitions,%s" % samdb.get_config_basedn())
self.schema_dn = samdb.get_schema_basedn()
self.rid_dn = ldb.Dn(samdb, "CN=RID Manager$,CN=System," + samdb.domain_dn())
self.ntds_dsa = ldb.Dn(samdb, samdb.get_dsServiceName())
self.class_schemaIDGUID = {}
self.wellknown_sds = get_wellknown_sds(self.samdb)
self.fix_all_missing_objectclass = False
self.fix_missing_deleted_objects = False
self.fix_replica_locations = False
self.fix_missing_rid_set_master = False
self.fix_changes_after_deletion_bug = False
self.dn_set = set()
self.link_id_cache = {}
self.name_map = {}
try:
base_dn = "CN=DnsAdmins,%s" % samdb.get_wellknown_dn(
samdb.get_default_basedn(),
dsdb.DS_GUID_USERS_CONTAINER)
res = samdb.search(base=base_dn, scope=ldb.SCOPE_BASE,
attrs=["objectSid"])
dnsadmins_sid = ndr_unpack(security.dom_sid, res[0]["objectSid"][0])
self.name_map['DnsAdmins'] = str(dnsadmins_sid)
except ldb.LdbError as e5:
(enum, estr) = e5.args
if enum != ldb.ERR_NO_SUCH_OBJECT:
raise
pass
self.system_session_info = system_session()
self.admin_session_info = admin_session(None, samdb.get_domain_sid())
res = self.samdb.search(base=self.ntds_dsa, scope=ldb.SCOPE_BASE, attrs=['msDS-hasMasterNCs', 'hasMasterNCs'])
if "msDS-hasMasterNCs" in res[0]:
self.write_ncs = res[0]["msDS-hasMasterNCs"]
else:
# If the Forest Level is less than 2003 then there is no
# msDS-hasMasterNCs, so we fall back to hasMasterNCs
# no need to merge as all the NCs that are in hasMasterNCs must
# also be in msDS-hasMasterNCs (but not the opposite)
if "hasMasterNCs" in res[0]:
self.write_ncs = res[0]["hasMasterNCs"]
else:
self.write_ncs = None
res = self.samdb.search(base="", scope=ldb.SCOPE_BASE, attrs=['namingContexts'])
self.deleted_objects_containers = []
self.ncs_lacking_deleted_containers = []
self.dns_partitions = []
try:
self.ncs = res[0]["namingContexts"]
except KeyError:
pass
except IndexError:
pass
for nc in self.ncs:
try:
dn = self.samdb.get_wellknown_dn(ldb.Dn(self.samdb, nc.decode('utf8')),
dsdb.DS_GUID_DELETED_OBJECTS_CONTAINER)
self.deleted_objects_containers.append(dn)
except KeyError:
self.ncs_lacking_deleted_containers.append(ldb.Dn(self.samdb, nc.decode('utf8')))
domaindns_zone = 'DC=DomainDnsZones,%s' % self.samdb.get_default_basedn()
forestdns_zone = 'DC=ForestDnsZones,%s' % self.samdb.get_root_basedn()
domain = self.samdb.search(scope=ldb.SCOPE_ONELEVEL,
attrs=["msDS-NC-Replica-Locations", "msDS-NC-RO-Replica-Locations"],
base=self.samdb.get_partitions_dn(),
expression="(&(objectClass=crossRef)(ncName=%s))" % domaindns_zone)
if len(domain) == 1:
self.dns_partitions.append((ldb.Dn(self.samdb, forestdns_zone), domain[0]))
forest = self.samdb.search(scope=ldb.SCOPE_ONELEVEL,
attrs=["msDS-NC-Replica-Locations", "msDS-NC-RO-Replica-Locations"],
base=self.samdb.get_partitions_dn(),
expression="(&(objectClass=crossRef)(ncName=%s))" % forestdns_zone)
if len(forest) == 1:
self.dns_partitions.append((ldb.Dn(self.samdb, domaindns_zone), forest[0]))
fsmo_dn = ldb.Dn(self.samdb, "CN=RID Manager$,CN=System," + self.samdb.domain_dn())
rid_master = get_fsmo_roleowner(self.samdb, fsmo_dn, "rid")
if ldb.Dn(self.samdb, self.samdb.get_dsServiceName()) == rid_master:
self.is_rid_master = True
else:
self.is_rid_master = False
# To get your rid set
# 1. Get server name
res = self.samdb.search(base=ldb.Dn(self.samdb, self.samdb.get_serverName()),
scope=ldb.SCOPE_BASE, attrs=["serverReference"])
# 2. Get server reference
self.server_ref_dn = ldb.Dn(self.samdb, res[0]['serverReference'][0].decode('utf8'))
# 3. Get RID Set
res = self.samdb.search(base=self.server_ref_dn,
scope=ldb.SCOPE_BASE, attrs=['rIDSetReferences'])
if "rIDSetReferences" in res[0]:
self.rid_set_dn = ldb.Dn(self.samdb, res[0]['rIDSetReferences'][0].decode('utf8'))
else:
self.rid_set_dn = None
ntds_service_dn = "CN=Directory Service,CN=Windows NT,CN=Services,%s" % \
self.samdb.get_config_basedn().get_linearized()
res = samdb.search(base=ntds_service_dn,
scope=ldb.SCOPE_BASE,
expression="(objectClass=nTDSService)",
attrs=["tombstoneLifetime"])
if "tombstoneLifetime" in res[0]:
self.tombstoneLifetime = int(res[0]["tombstoneLifetime"][0])
else:
self.tombstoneLifetime = 180
self.compatibleFeatures = []
self.requiredFeatures = []
try:
res = self.samdb.search(scope=ldb.SCOPE_BASE,
base="@SAMBA_DSDB",
attrs=["compatibleFeatures",
"requiredFeatures"])
if "compatibleFeatures" in res[0]:
self.compatibleFeatures = res[0]["compatibleFeatures"]
if "requiredFeatures" in res[0]:
self.requiredFeatures = res[0]["requiredFeatures"]
except ldb.LdbError as e6:
(enum, estr) = e6.args
if enum != ldb.ERR_NO_SUCH_OBJECT:
raise
pass
def check_database(self, DN=None, scope=ldb.SCOPE_SUBTREE, controls=None,
attrs=None):
'''perform a database check, returning the number of errors found'''
res = self.samdb.search(base=DN, scope=scope, attrs=['dn'], controls=controls)
self.report('Checking %u objects' % len(res))
error_count = 0
error_count += self.check_deleted_objects_containers()
self.attribute_or_class_ids = set()
for object in res:
self.dn_set.add(str(object.dn))
error_count += self.check_object(object.dn, requested_attrs=attrs)
if DN is None:
error_count += self.check_rootdse()
if self.expired_tombstones > 0:
self.report("NOTICE: found %d expired tombstones, "
"'samba' will remove them daily, "
"'samba-tool domain tombstones expunge' "
"would do that immediately." % (
self.expired_tombstones))
if error_count != 0 and not self.fix:
self.report("Please use --fix to fix these errors")
self.report('Checked %u objects (%u errors)' % (len(res), error_count))
return error_count
def check_deleted_objects_containers(self):
"""This function only fixes conflicts on the Deleted Objects
containers, not the attributes"""
error_count = 0
for nc in self.ncs_lacking_deleted_containers:
if nc == self.schema_dn:
continue
error_count += 1
self.report("ERROR: NC %s lacks a reference to a Deleted Objects container" % nc)
if not self.confirm_all('Fix missing Deleted Objects container for %s?' % (nc), 'fix_missing_deleted_objects'):
continue
dn = ldb.Dn(self.samdb, "CN=Deleted Objects")
dn.add_base(nc)
conflict_dn = None
try:
# If something already exists here, add a conflict
res = self.samdb.search(base=dn, scope=ldb.SCOPE_BASE, attrs=[],
controls=["show_deleted:1", "extended_dn:1:1",
"show_recycled:1", "reveal_internals:0"])
if len(res) != 0:
guid = res[0].dn.get_extended_component("GUID")
conflict_dn = ldb.Dn(self.samdb,
"CN=Deleted Objects\\0ACNF:%s" % str(misc.GUID(guid)))
conflict_dn.add_base(nc)
except ldb.LdbError as e2:
(enum, estr) = e2.args
if enum == ldb.ERR_NO_SUCH_OBJECT:
pass
else:
self.report("Couldn't check for conflicting Deleted Objects container: %s" % estr)
return 1
if conflict_dn is not None:
try:
self.samdb.rename(dn, conflict_dn, ["show_deleted:1", "relax:0", "show_recycled:1"])
except ldb.LdbError as e1:
(enum, estr) = e1.args
self.report("Couldn't move old Deleted Objects placeholder: %s to %s: %s" % (dn, conflict_dn, estr))
return 1
# Refresh wellKnownObjects links
res = self.samdb.search(base=nc, scope=ldb.SCOPE_BASE,
attrs=['wellKnownObjects'],
controls=["show_deleted:1", "extended_dn:0",
"show_recycled:1", "reveal_internals:0"])
if len(res) != 1:
self.report("wellKnownObjects was not found for NC %s" % nc)
return 1
# Prevent duplicate deleted objects containers just in case
wko = res[0]["wellKnownObjects"]
listwko = []
proposed_objectguid = None
for o in wko:
dsdb_dn = dsdb_Dn(self.samdb, o.decode('utf8'), dsdb.DSDB_SYNTAX_BINARY_DN)
if self.is_deleted_objects_dn(dsdb_dn):
self.report("wellKnownObjects had duplicate Deleted Objects value %s" % o)
# We really want to put this back in the same spot
# as the original one, so that on replication we
# merge, rather than conflict.
proposed_objectguid = dsdb_dn.dn.get_extended_component("GUID")
listwko.append(str(o))
if proposed_objectguid is not None:
guid_suffix = "\nobjectGUID: %s" % str(misc.GUID(proposed_objectguid))
else:
wko_prefix = "B:32:%s" % dsdb.DS_GUID_DELETED_OBJECTS_CONTAINER
listwko.append('%s:%s' % (wko_prefix, dn))
guid_suffix = ""
# Insert a brand new Deleted Objects container
self.samdb.add_ldif("""dn: %s
objectClass: top
objectClass: container
description: Container for deleted objects
isDeleted: TRUE
isCriticalSystemObject: TRUE
showInAdvancedViewOnly: TRUE
systemFlags: -1946157056%s""" % (dn, guid_suffix),
controls=["relax:0", "provision:0"])
delta = ldb.Message()
delta.dn = ldb.Dn(self.samdb, str(res[0]["dn"]))
delta["wellKnownObjects"] = ldb.MessageElement(listwko,
ldb.FLAG_MOD_REPLACE,
"wellKnownObjects")
# Insert the link to the brand new container
if self.do_modify(delta, ["relax:0"],
"NC %s lacks Deleted Objects WKGUID" % nc,
validate=False):
self.report("Added %s well known guid link" % dn)
self.deleted_objects_containers.append(dn)
return error_count
def report(self, msg):
'''print a message unless quiet is set'''
if not self.quiet:
print(msg)
def confirm(self, msg, allow_all=False, forced=False):
'''confirm a change'''
if not self.fix:
return False
if self.quiet:
return self.yes
if self.yes:
forced = True
return common.confirm(msg, forced=forced, allow_all=allow_all)
################################################################
# a local confirm function with support for 'all'
def confirm_all(self, msg, all_attr):
'''confirm a change with support for "all" '''
if not self.fix:
return False
if getattr(self, all_attr) == 'NONE':
return False
if getattr(self, all_attr) == 'ALL':
forced = True
else:
forced = self.yes
if self.quiet:
return forced
c = common.confirm(msg, forced=forced, allow_all=True)
if c == 'ALL':
setattr(self, all_attr, 'ALL')
return True
if c == 'NONE':
setattr(self, all_attr, 'NONE')
return False
return c
def do_delete(self, dn, controls, msg):
'''delete dn with optional verbose output'''
if self.verbose:
self.report("delete DN %s" % dn)
try:
controls = controls + ["local_oid:%s:0" % dsdb.DSDB_CONTROL_DBCHECK]
self.samdb.delete(dn, controls=controls)
except Exception as err:
if self.in_transaction:
raise CommandError("%s : %s" % (msg, err))
self.report("%s : %s" % (msg, err))
return False
return True
def do_modify(self, m, controls, msg, validate=True):
'''perform a modify with optional verbose output'''
controls = controls + ["local_oid:%s:0" % dsdb.DSDB_CONTROL_DBCHECK]
if self.verbose:
self.report(self.samdb.write_ldif(m, ldb.CHANGETYPE_MODIFY))
self.report("controls: %r" % controls)
try:
self.samdb.modify(m, controls=controls, validate=validate)
except Exception as err:
if self.in_transaction:
raise CommandError("%s : %s" % (msg, err))
self.report("%s : %s" % (msg, err))
return False
return True
def do_rename(self, from_dn, to_rdn, to_base, controls, msg):
'''perform a rename with optional verbose output'''
if self.verbose:
self.report("""dn: %s
changeType: modrdn
newrdn: %s
deleteOldRdn: 1
newSuperior: %s""" % (str(from_dn), str(to_rdn), str(to_base)))
try:
to_dn = to_rdn + to_base
controls = controls + ["local_oid:%s:0" % dsdb.DSDB_CONTROL_DBCHECK]
self.samdb.rename(from_dn, to_dn, controls=controls)
except Exception as err:
if self.in_transaction:
raise CommandError("%s : %s" % (msg, err))
self.report("%s : %s" % (msg, err))
return False
return True
def get_attr_linkID_and_reverse_name(self, attrname):
if attrname in self.link_id_cache:
return self.link_id_cache[attrname]
linkID = self.samdb_schema.get_linkId_from_lDAPDisplayName(attrname)
if linkID:
revname = self.samdb_schema.get_backlink_from_lDAPDisplayName(attrname)
else:
revname = None
self.link_id_cache[attrname] = (linkID, revname)
return linkID, revname
def err_empty_attribute(self, dn, attrname):
'''fix empty attributes'''
self.report("ERROR: Empty attribute %s in %s" % (attrname, dn))
if not self.confirm_all('Remove empty attribute %s from %s?' % (attrname, dn), 'remove_all_empty_attributes'):
self.report("Not fixing empty attribute %s" % attrname)
return
m = ldb.Message()
m.dn = dn
m[attrname] = ldb.MessageElement('', ldb.FLAG_MOD_DELETE, attrname)
if self.do_modify(m, ["relax:0", "show_recycled:1"],
"Failed to remove empty attribute %s" % attrname, validate=False):
self.report("Removed empty attribute %s" % attrname)
def err_normalise_mismatch(self, dn, attrname, values):
'''fix attribute normalisation errors, without altering sort order'''
self.report("ERROR: Normalisation error for attribute %s in %s" % (attrname, dn))
mod_list = []
for val in values:
normalised = self.samdb.dsdb_normalise_attributes(
self.samdb_schema, attrname, [val])
if len(normalised) != 1:
self.report("Unable to normalise value '%s'" % val)
mod_list.append((val, ''))
elif (normalised[0] != val):
self.report("value '%s' should be '%s'" % (val, normalised[0]))
mod_list.append((val, normalised[0]))
if not self.confirm_all('Fix normalisation for %s from %s?' % (attrname, dn), 'fix_all_normalisation'):
self.report("Not fixing attribute %s" % attrname)
return
m = ldb.Message()
m.dn = dn
for i in range(0, len(mod_list)):
(val, nval) = mod_list[i]
m['value_%u' % i] = ldb.MessageElement(val, ldb.FLAG_MOD_DELETE, attrname)
if nval != '':
m['normv_%u' % i] = ldb.MessageElement(nval, ldb.FLAG_MOD_ADD,
attrname)
if self.do_modify(m, ["relax:0", "show_recycled:1"],
"Failed to normalise attribute %s" % attrname,
validate=False):
self.report("Normalised attribute %s" % attrname)
def err_normalise_mismatch_replace(self, dn, attrname, values):
'''fix attribute normalisation and/or sort errors'''
normalised = self.samdb.dsdb_normalise_attributes(self.samdb_schema, attrname, values)
if list(normalised) == values:
# how we got here is a mystery.
return
self.report("ERROR: Normalisation error for attribute '%s' in '%s'" % (attrname, dn))
self.report("Values/Order of values do/does not match: %s/%s!" % (values, list(normalised)))
if not self.confirm_all("Fix normalisation for '%s' from '%s'?" % (attrname, dn), 'fix_all_normalisation'):
self.report("Not fixing attribute '%s'" % attrname)
return
m = ldb.Message()
m.dn = dn
m[attrname] = ldb.MessageElement(normalised, ldb.FLAG_MOD_REPLACE, attrname)
if self.do_modify(m, ["relax:0", "show_recycled:1"],
"Failed to normalise attribute %s" % attrname,
validate=False):
self.report("Normalised attribute %s" % attrname)
def err_duplicate_values(self, dn, attrname, dup_values, values):
'''fix duplicate attribute values'''
self.report("ERROR: Duplicate values for attribute '%s' in '%s'" % (attrname, dn))
self.report("Values contain a duplicate: [%s]/[%s]!" %
(dump_attr_values(dup_values), dump_attr_values(values)))
if not self.confirm_all("Fix duplicates for '%s' from '%s'?" % (attrname, dn), 'fix_all_duplicates'):
self.report("Not fixing attribute '%s'" % attrname)
return
m = ldb.Message()
m.dn = dn
m[attrname] = ldb.MessageElement(values, ldb.FLAG_MOD_REPLACE, attrname)
if self.do_modify(m, ["relax:0", "show_recycled:1"],
"Failed to remove duplicate value on attribute %s" % attrname,
validate=False):
self.report("Removed duplicate value on attribute %s" % attrname)
def is_deleted_objects_dn(self, dsdb_dn):
'''see if a dsdb_Dn is the special Deleted Objects DN'''
return dsdb_dn.prefix == "B:32:%s:" % dsdb.DS_GUID_DELETED_OBJECTS_CONTAINER
def err_missing_objectclass(self, dn):
"""handle object without objectclass"""
self.report("ERROR: missing objectclass in object %s. If you have another working DC, please run 'samba-tool drs replicate --full-sync --local <destinationDC> <sourceDC> %s'" % (dn, self.samdb.get_nc_root(dn)))
if not self.confirm_all("If you cannot re-sync from another DC, do you wish to delete object '%s'?" % dn, 'fix_all_missing_objectclass'):
self.report("Not deleting object with missing objectclass '%s'" % dn)
return
if self.do_delete(dn, ["relax:0"],
"Failed to remove DN %s" % dn):
self.report("Removed DN %s" % dn)
def err_deleted_dn(self, dn, attrname, val, dsdb_dn, correct_dn, remove_plausible=False):
"""handle a DN pointing to a deleted object"""
if not remove_plausible:
self.report("ERROR: target DN is deleted for %s in object %s - %s" % (attrname, dn, val))
self.report("Target GUID points at deleted DN %r" % str(correct_dn))
if not self.confirm_all('Remove DN link?', 'remove_implausible_deleted_DN_links'):
self.report("Not removing")
return
else:
self.report("WARNING: target DN is deleted for %s in object %s - %s" % (attrname, dn, val))
self.report("Target GUID points at deleted DN %r" % str(correct_dn))
if not self.confirm_all('Remove stale DN link?', 'remove_plausible_deleted_DN_links'):
self.report("Not removing")
return
m = ldb.Message()
m.dn = dn
m['old_value'] = ldb.MessageElement(val, ldb.FLAG_MOD_DELETE, attrname)
if self.do_modify(m, ["show_recycled:1",
"local_oid:%s:0" % dsdb.DSDB_CONTROL_REPLMD_VANISH_LINKS],
"Failed to remove deleted DN attribute %s" % attrname):
self.report("Removed deleted DN on attribute %s" % attrname)
def err_missing_target_dn_or_GUID(self, dn, attrname, val, dsdb_dn):
"""handle a missing target DN (if specified, GUID form can't be found,
and otherwise DN string form can't be found)"""
# Don't change anything if the object itself is deleted
if str(dn).find('\\0ADEL') != -1:
# We don't bump the error count as Samba produces these
# in normal operation
self.report("WARNING: no target object found for GUID "
"component link %s in deleted object "
"%s - %s" % (attrname, dn, val))
self.report("Not removing dangling one-way "
"link on deleted object "
"(tombstone garbage collection in progress?)")
return 0
# check if its a backlink
linkID, _ = self.get_attr_linkID_and_reverse_name(attrname)
if (linkID & 1 == 0) and str(dsdb_dn).find('\\0ADEL') == -1:
linkID, reverse_link_name \
= self.get_attr_linkID_and_reverse_name(attrname)
if reverse_link_name is not None:
self.report("WARNING: no target object found for GUID "
"component for one-way forward link "
"%s in object "
"%s - %s" % (attrname, dn, val))
self.report("Not removing dangling forward link")
return 0
nc_root = self.samdb.get_nc_root(dn)
try:
target_nc_root = self.samdb.get_nc_root(dsdb_dn.dn)
except ldb.LdbError as e:
(enum, estr) = e.args
if enum != ldb.ERR_NO_SUCH_OBJECT:
raise
target_nc_root = None
if target_nc_root is None:
# We don't bump the error count as Samba produces
# these in normal operation creating a lab domain (due
# to the way the rename is handled, links to
# now-expunged objects will never be fixed to stay
# inside the NC
self.report("WARNING: no target object found for GUID "
"component for link "
"%s in object to %s outside our NCs"
"%s - %s" % (attrname, dsdb_dn.dn, dn, val))
self.report("Not removing dangling one-way "
"left-over link outside our NCs "
"(we might be building a renamed/lab domain)")
return 0
if nc_root != target_nc_root:
# We don't bump the error count as Samba produces these
# in normal operation
self.report("WARNING: no target object found for GUID "
"component for cross-partition link "
"%s in object "
"%s - %s" % (attrname, dn, val))
self.report("Not removing dangling one-way "
"cross-partition link "
"(we might be mid-replication)")
return 0
# Due to our link handling one-way links pointing to
# missing objects are plausible.
#
# We don't bump the error count as Samba produces these
# in normal operation
self.report("WARNING: no target object found for GUID "
"component for DN value %s in object "
"%s - %s" % (attrname, dn, val))
self.err_deleted_dn(dn, attrname, val,
dsdb_dn, dsdb_dn, True)
return 0
# We bump the error count here, as we should have deleted this
self.report("ERROR: no target object found for GUID "
"component for link %s in object "
"%s - %s" % (attrname, dn, val))
self.err_deleted_dn(dn, attrname, val, dsdb_dn, dsdb_dn, False)
return 1
def err_missing_dn_GUID_component(self, dn, attrname, val, dsdb_dn, errstr):
"""handle a missing GUID extended DN component"""
self.report("ERROR: %s component for %s in object %s - %s" % (errstr, attrname, dn, val))
controls = ["extended_dn:1:1", "show_recycled:1"]
try:
res = self.samdb.search(base=str(dsdb_dn.dn), scope=ldb.SCOPE_BASE,
attrs=[], controls=controls)
except ldb.LdbError as e7:
(enum, estr) = e7.args
self.report("unable to find object for DN %s - (%s)" % (dsdb_dn.dn, estr))
if enum != ldb.ERR_NO_SUCH_OBJECT:
raise
self.err_missing_target_dn_or_GUID(dn, attrname, val, dsdb_dn)
return
if len(res) == 0:
self.report("unable to find object for DN %s" % dsdb_dn.dn)
self.err_missing_target_dn_or_GUID(dn, attrname, val, dsdb_dn)
return
dsdb_dn.dn = res[0].dn
if not self.confirm_all('Change DN to %s?' % str(dsdb_dn), 'fix_all_DN_GUIDs'):
self.report("Not fixing %s" % errstr)
return
m = ldb.Message()
m.dn = dn
m['old_value'] = ldb.MessageElement(val, ldb.FLAG_MOD_DELETE, attrname)
m['new_value'] = ldb.MessageElement(str(dsdb_dn), ldb.FLAG_MOD_ADD, attrname)
if self.do_modify(m, ["show_recycled:1"],
"Failed to fix %s on attribute %s" % (errstr, attrname)):
self.report("Fixed %s on attribute %s" % (errstr, attrname))
def err_incorrect_binary_dn(self, dn, attrname, val, dsdb_dn, errstr):
"""handle an incorrect binary DN component"""
self.report("ERROR: %s binary component for %s in object %s - %s" % (errstr, attrname, dn, val))
if not self.confirm_all('Change DN to %s?' % str(dsdb_dn), 'fix_all_binary_dn'):
self.report("Not fixing %s" % errstr)
return
m = ldb.Message()
m.dn = dn
m['old_value'] = ldb.MessageElement(val, ldb.FLAG_MOD_DELETE, attrname)
m['new_value'] = ldb.MessageElement(str(dsdb_dn), ldb.FLAG_MOD_ADD, attrname)
if self.do_modify(m, ["show_recycled:1"],
"Failed to fix %s on attribute %s" % (errstr, attrname)):
self.report("Fixed %s on attribute %s" % (errstr, attrname))
def err_dn_string_component_old(self, dn, attrname, val, dsdb_dn, correct_dn):
"""handle a DN string being incorrect due to a rename or delete"""
self.report("NOTE: old (due to rename or delete) DN string component for %s in object %s - %s" % (attrname, dn, val))
dsdb_dn.dn = correct_dn
if not self.confirm_all('Change DN to %s?' % str(dsdb_dn),
'fix_all_old_dn_string_component_mismatch'):
self.report("Not fixing old string component")
return
m = ldb.Message()
m.dn = dn
m['old_value'] = ldb.MessageElement(val, ldb.FLAG_MOD_DELETE, attrname)
m['new_value'] = ldb.MessageElement(str(dsdb_dn), ldb.FLAG_MOD_ADD, attrname)
if self.do_modify(m, ["show_recycled:1",
"local_oid:%s:1" % dsdb.DSDB_CONTROL_DBCHECK_FIX_LINK_DN_NAME],
"Failed to fix old DN string on attribute %s" % (attrname)):
self.report("Fixed old DN string on attribute %s" % (attrname))
def err_dn_component_target_mismatch(self, dn, attrname, val, dsdb_dn, correct_dn, mismatch_type):
"""handle a DN string being incorrect"""
self.report("ERROR: incorrect DN %s component for %s in object %s - %s" % (mismatch_type, attrname, dn, val))
dsdb_dn.dn = correct_dn
if not self.confirm_all('Change DN to %s?' % str(dsdb_dn),
'fix_all_%s_dn_component_mismatch' % mismatch_type):
self.report("Not fixing %s component mismatch" % mismatch_type)
return
m = ldb.Message()
m.dn = dn
m['old_value'] = ldb.MessageElement(val, ldb.FLAG_MOD_DELETE, attrname)
m['new_value'] = ldb.MessageElement(str(dsdb_dn), ldb.FLAG_MOD_ADD, attrname)
if self.do_modify(m, ["show_recycled:1"],
"Failed to fix incorrect DN %s on attribute %s" % (mismatch_type, attrname)):
self.report("Fixed incorrect DN %s on attribute %s" % (mismatch_type, attrname))
def err_dn_component_missing_target_sid(self, dn, attrname, val, dsdb_dn, target_sid_blob):
"""fix missing <SID=...> on linked attributes"""
self.report("ERROR: missing DN SID component for %s in object %s - %s" % (attrname, dn, val))
if len(dsdb_dn.prefix) != 0:
self.report("Not fixing missing DN SID on DN+BINARY or DN+STRING")
return
correct_dn = ldb.Dn(self.samdb, dsdb_dn.dn.extended_str())
correct_dn.set_extended_component("SID", target_sid_blob)
if not self.confirm_all('Change DN to %s?' % correct_dn.extended_str(),
'fix_all_SID_dn_component_missing'):
self.report("Not fixing missing DN SID component")
return
target_guid_blob = correct_dn.get_extended_component("GUID")
guid_sid_dn = ldb.Dn(self.samdb, "")
guid_sid_dn.set_extended_component("GUID", target_guid_blob)
guid_sid_dn.set_extended_component("SID", target_sid_blob)
m = ldb.Message()
m.dn = dn
m['new_value'] = ldb.MessageElement(guid_sid_dn.extended_str(), ldb.FLAG_MOD_ADD, attrname)
controls = [
"show_recycled:1",
"local_oid:%s:1" % dsdb.DSDB_CONTROL_DBCHECK_FIX_LINK_DN_SID
]
if self.do_modify(m, controls,
"Failed to ADD missing DN SID on attribute %s" % (attrname)):
self.report("Fixed missing DN SID on attribute %s" % (attrname))
def err_unknown_attribute(self, obj, attrname):
'''handle an unknown attribute error'''
self.report("ERROR: unknown attribute '%s' in %s" % (attrname, obj.dn))
if not self.confirm_all('Remove unknown attribute %s' % attrname, 'remove_all_unknown_attributes'):
self.report("Not removing %s" % attrname)
return
m = ldb.Message()
m.dn = obj.dn
m['old_value'] = ldb.MessageElement([], ldb.FLAG_MOD_DELETE, attrname)
if self.do_modify(m, ["relax:0", "show_recycled:1"],
"Failed to remove unknown attribute %s" % attrname):
self.report("Removed unknown attribute %s" % (attrname))
def err_undead_linked_attribute(self, obj, attrname, val):
'''handle a link that should not be there on a deleted object'''
self.report("ERROR: linked attribute '%s' to '%s' is present on "
"deleted object %s" % (attrname, val, obj.dn))
if not self.confirm_all('Remove linked attribute %s' % attrname, 'fix_undead_linked_attributes'):
self.report("Not removing linked attribute %s" % attrname)
return
m = ldb.Message()
m.dn = obj.dn
m['old_value'] = ldb.MessageElement(val, ldb.FLAG_MOD_DELETE, attrname)
if self.do_modify(m, ["show_recycled:1", "show_deleted:1", "reveal_internals:0",
"local_oid:%s:0" % dsdb.DSDB_CONTROL_REPLMD_VANISH_LINKS],
"Failed to delete forward link %s" % attrname):
self.report("Fixed undead forward link %s" % (attrname))
def err_missing_backlink(self, obj, attrname, val, backlink_name, target_dn):
'''handle a missing backlink value'''
self.report("ERROR: missing backlink attribute '%s' in %s for link %s in %s" % (backlink_name, target_dn, attrname, obj.dn))
if not self.confirm_all('Fix missing backlink %s' % backlink_name, 'fix_all_missing_backlinks'):
self.report("Not fixing missing backlink %s" % backlink_name)
return
m = ldb.Message()
m.dn = target_dn
m['new_value'] = ldb.MessageElement(val, ldb.FLAG_MOD_ADD, backlink_name)
if self.do_modify(m, ["show_recycled:1", "relax:0"],
"Failed to fix missing backlink %s" % backlink_name):
self.report("Fixed missing backlink %s" % (backlink_name))
def err_incorrect_rmd_flags(self, obj, attrname, revealed_dn):
'''handle a incorrect RMD_FLAGS value'''
rmd_flags = int(revealed_dn.dn.get_extended_component("RMD_FLAGS"))
self.report("ERROR: incorrect RMD_FLAGS value %u for attribute '%s' in %s for link %s" % (rmd_flags, attrname, obj.dn, revealed_dn.dn.extended_str()))
if not self.confirm_all('Fix incorrect RMD_FLAGS %u' % rmd_flags, 'fix_rmd_flags'):
self.report("Not fixing incorrect RMD_FLAGS %u" % rmd_flags)
return
m = ldb.Message()
m.dn = obj.dn
m['old_value'] = ldb.MessageElement(str(revealed_dn), ldb.FLAG_MOD_DELETE, attrname)
if self.do_modify(m, ["show_recycled:1", "reveal_internals:0", "show_deleted:0"],
"Failed to fix incorrect RMD_FLAGS %u" % rmd_flags):
self.report("Fixed incorrect RMD_FLAGS %u" % (rmd_flags))
def err_orphaned_backlink(self, obj_dn, backlink_attr, backlink_val,
target_dn, forward_attr, forward_syntax,
check_duplicates=True):
'''handle a orphaned backlink value'''
if check_duplicates is True and self.has_duplicate_links(target_dn, forward_attr, forward_syntax):
self.report("WARNING: Keep orphaned backlink attribute " +
"'%s' in '%s' for link '%s' in '%s'" % (
backlink_attr, obj_dn, forward_attr, target_dn))
return
self.report("ERROR: orphaned backlink attribute '%s' in %s for link %s in %s" % (backlink_attr, obj_dn, forward_attr, target_dn))
if not self.confirm_all('Remove orphaned backlink %s' % backlink_attr, 'fix_all_orphaned_backlinks'):
self.report("Not removing orphaned backlink %s" % backlink_attr)
return
m = ldb.Message()
m.dn = obj_dn
m['value'] = ldb.MessageElement(backlink_val, ldb.FLAG_MOD_DELETE, backlink_attr)
if self.do_modify(m, ["show_recycled:1", "relax:0"],
"Failed to fix orphaned backlink %s" % backlink_attr):
self.report("Fixed orphaned backlink %s" % (backlink_attr))
def err_recover_forward_links(self, obj, forward_attr, forward_vals):
'''handle a duplicate links value'''
self.report("RECHECK: 'Missing/Duplicate/Correct link' lines above for attribute '%s' in '%s'" % (forward_attr, obj.dn))
if not self.confirm_all("Commit fixes for (missing/duplicate) forward links in attribute '%s'" % forward_attr, 'recover_all_forward_links'):
self.report("Not fixing corrupted (missing/duplicate) forward links in attribute '%s' of '%s'" % (
forward_attr, obj.dn))
return
m = ldb.Message()
m.dn = obj.dn
m['value'] = ldb.MessageElement(forward_vals, ldb.FLAG_MOD_REPLACE, forward_attr)
if self.do_modify(m, ["local_oid:%s:1" % dsdb.DSDB_CONTROL_DBCHECK_FIX_DUPLICATE_LINKS],
"Failed to fix duplicate links in attribute '%s'" % forward_attr):
self.report("Fixed duplicate links in attribute '%s'" % (forward_attr))
duplicate_cache_key = "%s:%s" % (str(obj.dn), forward_attr)
assert duplicate_cache_key in self.duplicate_link_cache
self.duplicate_link_cache[duplicate_cache_key] = False
def err_no_fsmoRoleOwner(self, obj):
'''handle a missing fSMORoleOwner'''
self.report("ERROR: fSMORoleOwner not found for role %s" % (obj.dn))
res = self.samdb.search("",
scope=ldb.SCOPE_BASE, attrs=["dsServiceName"])
assert len(res) == 1
serviceName = str(res[0]["dsServiceName"][0])
if not self.confirm_all('Seize role %s onto current DC by adding fSMORoleOwner=%s' % (obj.dn, serviceName), 'seize_fsmo_role'):
self.report("Not Seizing role %s onto current DC by adding fSMORoleOwner=%s" % (obj.dn, serviceName))
return
m = ldb.Message()
m.dn = obj.dn
m['value'] = ldb.MessageElement(serviceName, ldb.FLAG_MOD_ADD, 'fSMORoleOwner')
if self.do_modify(m, [],
"Failed to seize role %s onto current DC by adding fSMORoleOwner=%s" % (obj.dn, serviceName)):
self.report("Seized role %s onto current DC by adding fSMORoleOwner=%s" % (obj.dn, serviceName))
def err_missing_parent(self, obj):
'''handle a missing parent'''
self.report("ERROR: parent object not found for %s" % (obj.dn))
if not self.confirm_all('Move object %s into LostAndFound?' % (obj.dn), 'move_to_lost_and_found'):
self.report('Not moving object %s into LostAndFound' % (obj.dn))
return
keep_transaction = False
self.samdb.transaction_start()
try:
nc_root = self.samdb.get_nc_root(obj.dn)
lost_and_found = self.samdb.get_wellknown_dn(nc_root, dsdb.DS_GUID_LOSTANDFOUND_CONTAINER)
new_dn = ldb.Dn(self.samdb, str(obj.dn))
new_dn.remove_base_components(len(new_dn) - 1)
if self.do_rename(obj.dn, new_dn, lost_and_found, ["show_deleted:0", "relax:0"],
"Failed to rename object %s into lostAndFound at %s" % (obj.dn, new_dn + lost_and_found)):
self.report("Renamed object %s into lostAndFound at %s" % (obj.dn, new_dn + lost_and_found))
m = ldb.Message()
m.dn = obj.dn
m['lastKnownParent'] = ldb.MessageElement(str(obj.dn.parent()), ldb.FLAG_MOD_REPLACE, 'lastKnownParent')
if self.do_modify(m, [],
"Failed to set lastKnownParent on lostAndFound object at %s" % (new_dn + lost_and_found)):
self.report("Set lastKnownParent on lostAndFound object at %s" % (new_dn + lost_and_found))
keep_transaction = True
except:
self.samdb.transaction_cancel()
raise
if keep_transaction:
self.samdb.transaction_commit()
else:
self.samdb.transaction_cancel()
def err_wrong_dn(self, obj, new_dn, rdn_attr, rdn_val, name_val, controls):
'''handle a wrong dn'''
new_rdn = ldb.Dn(self.samdb, str(new_dn))
new_rdn.remove_base_components(len(new_rdn) - 1)
new_parent = new_dn.parent()
attributes = ""
if rdn_val != name_val:
attributes += "%s=%r " % (rdn_attr, rdn_val)
attributes += "name=%r" % (name_val)
self.report("ERROR: wrong dn[%s] %s new_dn[%s]" % (obj.dn, attributes, new_dn))
if not self.confirm_all("Rename %s to %s?" % (obj.dn, new_dn), 'fix_dn'):
self.report("Not renaming %s to %s" % (obj.dn, new_dn))
return
if self.do_rename(obj.dn, new_rdn, new_parent, controls,
"Failed to rename object %s into %s" % (obj.dn, new_dn)):
self.report("Renamed %s into %s" % (obj.dn, new_dn))
def err_wrong_instancetype(self, obj, calculated_instancetype):
'''handle a wrong instanceType'''
self.report("ERROR: wrong instanceType %s on %s, should be %d" % (obj["instanceType"], obj.dn, calculated_instancetype))
if not self.confirm_all('Change instanceType from %s to %d on %s?' % (obj["instanceType"], calculated_instancetype, obj.dn), 'fix_instancetype'):
self.report('Not changing instanceType from %s to %d on %s' % (obj["instanceType"], calculated_instancetype, obj.dn))
return
m = ldb.Message()
m.dn = obj.dn
m['value'] = ldb.MessageElement(str(calculated_instancetype), ldb.FLAG_MOD_REPLACE, 'instanceType')
if self.do_modify(m, ["local_oid:%s:0" % dsdb.DSDB_CONTROL_DBCHECK_MODIFY_RO_REPLICA],
"Failed to correct missing instanceType on %s by setting instanceType=%d" % (obj.dn, calculated_instancetype)):
self.report("Corrected instancetype on %s by setting instanceType=%d" % (obj.dn, calculated_instancetype))
def err_short_userParameters(self, obj, attrname, value):
# This is a truncated userParameters due to a pre 4.1 replication bug
self.report("ERROR: incorrect userParameters value on object %s. If you have another working DC that does not give this warning, please run 'samba-tool drs replicate --full-sync --local <destinationDC> <sourceDC> %s'" % (obj.dn, self.samdb.get_nc_root(obj.dn)))
def err_base64_userParameters(self, obj, attrname, value):
'''handle a userParameters that is wrongly base64 encoded'''
self.report("ERROR: wrongly formatted userParameters %s on %s, should not be base64-encoded" % (value, obj.dn))
if not self.confirm_all('Convert userParameters from base64 encoding on %s?' % (obj.dn), 'fix_base64_userparameters'):
self.report('Not changing userParameters from base64 encoding on %s' % (obj.dn))
return
m = ldb.Message()
m.dn = obj.dn
m['value'] = ldb.MessageElement(b64decode(obj[attrname][0]), ldb.FLAG_MOD_REPLACE, 'userParameters')
if self.do_modify(m, [],
"Failed to correct base64-encoded userParameters on %s by converting from base64" % (obj.dn)):
self.report("Corrected base64-encoded userParameters on %s by converting from base64" % (obj.dn))
def err_utf8_userParameters(self, obj, attrname, value):
'''handle a userParameters that is wrongly utf-8 encoded'''
self.report("ERROR: wrongly formatted userParameters on %s, "
"should not be pseudo-UTF8 encoded" % (obj.dn))
if not self.confirm_all('Convert userParameters from UTF8 encoding on %s?' % (obj.dn), 'fix_utf8_userparameters'):
self.report('Not changing userParameters from UTF8 encoding on %s' % (obj.dn))
return
m = ldb.Message()
m.dn = obj.dn
m['value'] = ldb.MessageElement(obj[attrname][0].decode('utf8').encode('utf-16-le'),
ldb.FLAG_MOD_REPLACE, 'userParameters')
if self.do_modify(m, [],
"Failed to correct psudo-UTF8 encoded userParameters on %s by converting from UTF8" % (obj.dn)):
self.report("Corrected psudo-UTF8 encoded userParameters on %s by converting from UTF8" % (obj.dn))
def err_doubled_userParameters(self, obj, attrname, value):
'''handle a userParameters that has been utf-16 encoded twice'''
self.report("ERROR: wrongly formatted userParameters on %s, should not be double UTF16 encoded" % (obj.dn))
if not self.confirm_all('Convert userParameters from doubled UTF-16 encoding on %s?' % (obj.dn), 'fix_doubled_userparameters'):
self.report('Not changing userParameters from doubled UTF-16 encoding on %s' % (obj.dn))
return
m = ldb.Message()
m.dn = obj.dn
# m['value'] = ldb.MessageElement(obj[attrname][0].decode('utf-16-le').decode('utf-16-le').encode('utf-16-le'),
# hmm the above old python2 code doesn't make sense to me and cannot
# work in python3 because a string doesn't have a decode method.
# However in python2 for some unknown reason this double decode
# followed by encode seems to result in what looks like utf8.
# In python2 just .decode('utf-16-le').encode('utf-16-le') does nothing
# but trigger the 'double UTF16 encoded' condition again :/
#
# In python2 and python3 value.decode('utf-16-le').encode('utf8') seems
# to do the trick and work as expected.
m['value'] = ldb.MessageElement(obj[attrname][0].decode('utf-16-le').encode('utf8'),
ldb.FLAG_MOD_REPLACE, 'userParameters')
if self.do_modify(m, [],
"Failed to correct doubled-UTF16 encoded userParameters on %s by converting" % (obj.dn)):
self.report("Corrected doubled-UTF16 encoded userParameters on %s by converting" % (obj.dn))
def err_odd_userParameters(self, obj, attrname):
"""Fix a truncated userParameters due to a pre 4.1 replication bug"""
self.report("ERROR: incorrect userParameters value on object %s (odd length). If you have another working DC that does not give this warning, please run 'samba-tool drs replicate --full-sync --local <destinationDC> <sourceDC> %s'" % (obj.dn, self.samdb.get_nc_root(obj.dn)))
def find_revealed_link(self, dn, attrname, guid):
'''return a revealed link in an object'''
res = self.samdb.search(base=dn, scope=ldb.SCOPE_BASE, attrs=[attrname],
controls=["show_deleted:0", "extended_dn:0", "reveal_internals:0"])
syntax_oid = self.samdb_schema.get_syntax_oid_from_lDAPDisplayName(attrname)
for val in res[0][attrname]:
dsdb_dn = dsdb_Dn(self.samdb, val.decode('utf8'), syntax_oid)
guid2 = dsdb_dn.dn.get_extended_component("GUID")
if guid == guid2:
return dsdb_dn
return None
def check_duplicate_links(self, obj, forward_attr, forward_syntax, forward_linkID, backlink_attr):
'''check a linked values for duplicate forward links'''
error_count = 0
duplicate_dict = dict()
unique_dict = dict()
# Only forward links can have this problem
if forward_linkID & 1:
# If we got the reverse, skip it
return (error_count, duplicate_dict, unique_dict)
if backlink_attr is None:
return (error_count, duplicate_dict, unique_dict)
duplicate_cache_key = "%s:%s" % (str(obj.dn), forward_attr)
if duplicate_cache_key not in self.duplicate_link_cache:
self.duplicate_link_cache[duplicate_cache_key] = False
for val in obj[forward_attr]:
dsdb_dn = dsdb_Dn(self.samdb, val.decode('utf8'), forward_syntax)
# all DNs should have a GUID component
guid = dsdb_dn.dn.get_extended_component("GUID")
if guid is None:
continue
guidstr = str(misc.GUID(guid))
keystr = guidstr + dsdb_dn.prefix
if keystr not in unique_dict:
unique_dict[keystr] = dsdb_dn
continue
error_count += 1
if keystr not in duplicate_dict:
duplicate_dict[keystr] = dict()
duplicate_dict[keystr]["keep"] = None
duplicate_dict[keystr]["delete"] = list()
# Now check for the highest RMD_VERSION
v1 = int(unique_dict[keystr].dn.get_extended_component("RMD_VERSION"))
v2 = int(dsdb_dn.dn.get_extended_component("RMD_VERSION"))
if v1 > v2:
duplicate_dict[keystr]["keep"] = unique_dict[keystr]
duplicate_dict[keystr]["delete"].append(dsdb_dn)
continue
if v1 < v2:
duplicate_dict[keystr]["keep"] = dsdb_dn
duplicate_dict[keystr]["delete"].append(unique_dict[keystr])
unique_dict[keystr] = dsdb_dn
continue
# Fallback to the highest RMD_LOCAL_USN
u1 = int(unique_dict[keystr].dn.get_extended_component("RMD_LOCAL_USN"))
u2 = int(dsdb_dn.dn.get_extended_component("RMD_LOCAL_USN"))
if u1 >= u2:
duplicate_dict[keystr]["keep"] = unique_dict[keystr]
duplicate_dict[keystr]["delete"].append(dsdb_dn)
continue
duplicate_dict[keystr]["keep"] = dsdb_dn
duplicate_dict[keystr]["delete"].append(unique_dict[keystr])
unique_dict[keystr] = dsdb_dn
if error_count != 0:
self.duplicate_link_cache[duplicate_cache_key] = True
return (error_count, duplicate_dict, unique_dict)
def has_duplicate_links(self, dn, forward_attr, forward_syntax):
'''check a linked values for duplicate forward links'''
error_count = 0
duplicate_cache_key = "%s:%s" % (str(dn), forward_attr)
if duplicate_cache_key in self.duplicate_link_cache:
return self.duplicate_link_cache[duplicate_cache_key]
forward_linkID, backlink_attr = self.get_attr_linkID_and_reverse_name(forward_attr)
attrs = [forward_attr]
controls = ["extended_dn:1:1", "reveal_internals:0"]
# check its the right GUID
try:
res = self.samdb.search(base=str(dn), scope=ldb.SCOPE_BASE,
attrs=attrs, controls=controls)
except ldb.LdbError as e8:
(enum, estr) = e8.args
if enum != ldb.ERR_NO_SUCH_OBJECT:
raise
return False
obj = res[0]
error_count, duplicate_dict, unique_dict = \
self.check_duplicate_links(obj, forward_attr, forward_syntax, forward_linkID, backlink_attr)
if duplicate_cache_key in self.duplicate_link_cache:
return self.duplicate_link_cache[duplicate_cache_key]
return False
def find_missing_forward_links_from_backlinks(self, obj,
forward_attr,
forward_syntax,
backlink_attr,
forward_unique_dict):
'''Find all backlinks linking to obj_guid_str not already in forward_unique_dict'''
missing_forward_links = []
error_count = 0
if backlink_attr is None:
return (missing_forward_links, error_count)
if forward_syntax != ldb.SYNTAX_DN:
self.report("Not checking for missing forward links for syntax: %s" %
forward_syntax)
return (missing_forward_links, error_count)
if "sortedLinks" in self.compatibleFeatures:
self.report("Not checking for missing forward links because the db " +
"has the sortedLinks feature")
return (missing_forward_links, error_count)
try:
obj_guid = obj['objectGUID'][0]
obj_guid_str = str(ndr_unpack(misc.GUID, obj_guid))
filter = "(%s=<GUID=%s>)" % (backlink_attr, obj_guid_str)
res = self.samdb.search(expression=filter,
scope=ldb.SCOPE_SUBTREE, attrs=["objectGUID"],
controls=["extended_dn:1:1",
"search_options:1:2",
"paged_results:1:1000"])
except ldb.LdbError as e9:
(enum, estr) = e9.args
raise
for r in res:
target_dn = dsdb_Dn(self.samdb, r.dn.extended_str(), forward_syntax)
guid = target_dn.dn.get_extended_component("GUID")
guidstr = str(misc.GUID(guid))
if guidstr in forward_unique_dict:
continue
# A valid forward link looks like this:
#
# <GUID=9f92d30a-fc23-11e4-a5f6-30be15454808>;
# <RMD_ADDTIME=131607546230000000>;
# <RMD_CHANGETIME=131607546230000000>;
# <RMD_FLAGS=0>;
# <RMD_INVOCID=4e4496a3-7fb8-4f97-8a33-d238db8b5e2d>;
# <RMD_LOCAL_USN=3765>;
# <RMD_ORIGINATING_USN=3765>;
# <RMD_VERSION=1>;
# <SID=S-1-5-21-4177067393-1453636373-93818738-1124>;
# CN=unsorted-u8,CN=Users,DC=release-4-5-0-pre1,DC=samba,DC=corp
#
# Note that versions older than Samba 4.8 create
# links with RMD_VERSION=0.
#
# Try to get the local_usn and time from objectClass
# if possible and fallback to any other one.
repl = ndr_unpack(drsblobs.replPropertyMetaDataBlob,
obj['replPropertyMetadata'][0])
for o in repl.ctr.array:
local_usn = o.local_usn
t = o.originating_change_time
if o.attid == drsuapi.DRSUAPI_ATTID_objectClass:
break
# We use a magic invocationID for restoring missing
# forward links to recover from bug #13228.
# This should allow some more future magic to fix the
# problem.
#
# It also means it looses the conflict resolution
# against almost every real invocation, if the
# version is also 0.
originating_invocid = misc.GUID("ffffffff-4700-4700-4700-000000b13228")
originating_usn = 1
rmd_addtime = t
rmd_changetime = t
rmd_flags = 0
rmd_invocid = originating_invocid
rmd_originating_usn = originating_usn
rmd_local_usn = local_usn
rmd_version = 0
target_dn.dn.set_extended_component("RMD_ADDTIME", str(rmd_addtime))
target_dn.dn.set_extended_component("RMD_CHANGETIME", str(rmd_changetime))
target_dn.dn.set_extended_component("RMD_FLAGS", str(rmd_flags))
target_dn.dn.set_extended_component("RMD_INVOCID", ndr_pack(rmd_invocid))
target_dn.dn.set_extended_component("RMD_ORIGINATING_USN", str(rmd_originating_usn))
target_dn.dn.set_extended_component("RMD_LOCAL_USN", str(rmd_local_usn))
target_dn.dn.set_extended_component("RMD_VERSION", str(rmd_version))
error_count += 1
missing_forward_links.append(target_dn)
return (missing_forward_links, error_count)
def check_dn(self, obj, attrname, syntax_oid):
'''check a DN attribute for correctness'''
error_count = 0
obj_guid = obj['objectGUID'][0]
linkID, reverse_link_name = self.get_attr_linkID_and_reverse_name(attrname)
if reverse_link_name is not None:
reverse_syntax_oid = self.samdb_schema.get_syntax_oid_from_lDAPDisplayName(reverse_link_name)
else:
reverse_syntax_oid = None
is_member_link = attrname in ("member", "memberOf")
if is_member_link and self.quick_membership_checks:
duplicate_dict = {}
else:
error_count, duplicate_dict, unique_dict = \
self.check_duplicate_links(obj, attrname, syntax_oid,
linkID, reverse_link_name)
if len(duplicate_dict) != 0:
missing_forward_links, missing_error_count = \
self.find_missing_forward_links_from_backlinks(obj,
attrname, syntax_oid,
reverse_link_name,
unique_dict)
error_count += missing_error_count
forward_links = [dn for dn in unique_dict.values()]
if missing_error_count != 0:
self.report("ERROR: Missing and duplicate forward link values for attribute '%s' in '%s'" % (
attrname, obj.dn))
else:
self.report("ERROR: Duplicate forward link values for attribute '%s' in '%s'" % (attrname, obj.dn))
for m in missing_forward_links:
self.report("Missing link '%s'" % (m))
if not self.confirm_all("Schedule readding missing forward link for attribute %s" % attrname,
'fix_all_missing_forward_links'):
self.err_orphaned_backlink(m.dn, reverse_link_name,
obj.dn.extended_str(), obj.dn,
attrname, syntax_oid,
check_duplicates=False)
continue
forward_links += [m]
for keystr in duplicate_dict.keys():
d = duplicate_dict[keystr]
for dd in d["delete"]:
self.report("Duplicate link '%s'" % dd)
self.report("Correct link '%s'" % d["keep"])
# We now construct the sorted dn values.
# They're sorted by the objectGUID of the target
# See dsdb_Dn.__cmp__()
vals = [str(dn) for dn in sorted(forward_links)]
self.err_recover_forward_links(obj, attrname, vals)
# We should continue with the fixed values
obj[attrname] = ldb.MessageElement(vals, 0, attrname)
for val in obj[attrname]:
dsdb_dn = dsdb_Dn(self.samdb, val.decode('utf8'), syntax_oid)
# all DNs should have a GUID component
guid = dsdb_dn.dn.get_extended_component("GUID")
if guid is None:
error_count += 1
self.err_missing_dn_GUID_component(obj.dn, attrname, val, dsdb_dn,
"missing GUID")
continue
guidstr = str(misc.GUID(guid))
attrs = ['isDeleted', 'replPropertyMetaData']
if (str(attrname).lower() == 'msds-hasinstantiatedncs') and (obj.dn == self.ntds_dsa):
fixing_msDS_HasInstantiatedNCs = True
attrs.append("instanceType")
else:
fixing_msDS_HasInstantiatedNCs = False
if reverse_link_name is not None:
attrs.append(reverse_link_name)
# check its the right GUID
try:
res = self.samdb.search(base="<GUID=%s>" % guidstr, scope=ldb.SCOPE_BASE,
attrs=attrs, controls=["extended_dn:1:1", "show_recycled:1",
"reveal_internals:0"
])
except ldb.LdbError as e3:
(enum, estr) = e3.args
if enum != ldb.ERR_NO_SUCH_OBJECT:
raise
# We don't always want to
error_count += self.err_missing_target_dn_or_GUID(obj.dn,
attrname,
val,
dsdb_dn)
continue
if fixing_msDS_HasInstantiatedNCs:
dsdb_dn.prefix = "B:8:%08X:" % int(res[0]['instanceType'][0])
dsdb_dn.binary = "%08X" % int(res[0]['instanceType'][0])
if str(dsdb_dn) != str(val):
error_count += 1
self.err_incorrect_binary_dn(obj.dn, attrname, val, dsdb_dn, "incorrect instanceType part of Binary DN")
continue
# now we have two cases - the source object might or might not be deleted
is_deleted = 'isDeleted' in obj and str(obj['isDeleted'][0]).upper() == 'TRUE'
target_is_deleted = 'isDeleted' in res[0] and str(res[0]['isDeleted'][0]).upper() == 'TRUE'
if is_deleted and obj.dn not in self.deleted_objects_containers and linkID:
# A fully deleted object should not have any linked
# attributes. (MS-ADTS 3.1.1.5.5.1.1 Tombstone
# Requirements and 3.1.1.5.5.1.3 Recycled-Object
# Requirements)
self.err_undead_linked_attribute(obj, attrname, val)
error_count += 1
continue
elif target_is_deleted and not self.is_deleted_objects_dn(dsdb_dn) and linkID:
# the target DN is not allowed to be deleted, unless the target DN is the
# special Deleted Objects container
error_count += 1
local_usn = dsdb_dn.dn.get_extended_component("RMD_LOCAL_USN")
if local_usn:
if 'replPropertyMetaData' in res[0]:
repl = ndr_unpack(drsblobs.replPropertyMetaDataBlob,
res[0]['replPropertyMetadata'][0])
found_data = False
for o in repl.ctr.array:
if o.attid == drsuapi.DRSUAPI_ATTID_isDeleted:
deleted_usn = o.local_usn
if deleted_usn >= int(local_usn):
# If the object was deleted after the link
# was last modified then, clean it up here
found_data = True
break
if found_data:
self.err_deleted_dn(obj.dn, attrname,
val, dsdb_dn, res[0].dn, True)
continue
self.err_deleted_dn(obj.dn, attrname, val, dsdb_dn, res[0].dn, False)
continue
# We should not check for incorrect
# components on deleted links, as these are allowed to
# go stale (we just need the GUID, not the name)
rmd_blob = dsdb_dn.dn.get_extended_component("RMD_FLAGS")
rmd_flags = 0
if rmd_blob is not None:
rmd_flags = int(rmd_blob)
# assert the DN matches in string form, where a reverse
# link exists, otherwise (below) offer to fix it as a non-error.
# The string form is essentially only kept for forensics,
# as we always re-resolve by GUID in normal operations.
if not rmd_flags & 1 and reverse_link_name is not None:
if str(res[0].dn) != str(dsdb_dn.dn):
error_count += 1
self.err_dn_component_target_mismatch(obj.dn, attrname, val, dsdb_dn,
res[0].dn, "string")
continue
if res[0].dn.get_extended_component("GUID") != dsdb_dn.dn.get_extended_component("GUID"):
error_count += 1
self.err_dn_component_target_mismatch(obj.dn, attrname, val, dsdb_dn,
res[0].dn, "GUID")
continue
target_sid = res[0].dn.get_extended_component("SID")
link_sid = dsdb_dn.dn.get_extended_component("SID")
if link_sid is None and target_sid is not None:
error_count += 1
self.err_dn_component_missing_target_sid(obj.dn, attrname, val,
dsdb_dn, target_sid)
continue
if link_sid != target_sid:
error_count += 1
self.err_dn_component_target_mismatch(obj.dn, attrname, val, dsdb_dn,
res[0].dn, "SID")
continue
# Only for non-links, not even forward-only links
# (otherwise this breaks repl_meta_data):
#
# Now we have checked the GUID and SID, offer to fix old
# DN strings as a non-error (DNs, not links so no
# backlink). Samba does not maintain this string
# otherwise, so we don't increment error_count.
if reverse_link_name is None:
if linkID == 0 and str(res[0].dn) != str(dsdb_dn.dn):
# Pass in the old/bad DN without the <GUID=...> part,
# otherwise the LDB code will correct it on the way through
# (Note: we still want to preserve the DSDB DN prefix in the
# case of binary DNs)
bad_dn = dsdb_dn.prefix + dsdb_dn.dn.get_linearized()
self.err_dn_string_component_old(obj.dn, attrname, bad_dn,
dsdb_dn, res[0].dn)
continue
if is_member_link and self.quick_membership_checks:
continue
# check the reverse_link is correct if there should be one
match_count = 0
if reverse_link_name in res[0]:
for v in res[0][reverse_link_name]:
v_dn = dsdb_Dn(self.samdb, v.decode('utf8'))
v_guid = v_dn.dn.get_extended_component("GUID")
v_blob = v_dn.dn.get_extended_component("RMD_FLAGS")
v_rmd_flags = 0
if v_blob is not None:
v_rmd_flags = int(v_blob)
if v_rmd_flags & 1:
continue
if v_guid == obj_guid:
match_count += 1
if match_count != 1:
if syntax_oid == dsdb.DSDB_SYNTAX_BINARY_DN or reverse_syntax_oid == dsdb.DSDB_SYNTAX_BINARY_DN:
if not linkID & 1:
# Forward binary multi-valued linked attribute
forward_count = 0
for w in obj[attrname]:
w_guid = dsdb_Dn(self.samdb, w.decode('utf8')).dn.get_extended_component("GUID")
if w_guid == guid:
forward_count += 1
if match_count == forward_count:
continue
expected_count = 0
for v in obj[attrname]:
v_dn = dsdb_Dn(self.samdb, v.decode('utf8'))
v_guid = v_dn.dn.get_extended_component("GUID")
v_blob = v_dn.dn.get_extended_component("RMD_FLAGS")
v_rmd_flags = 0
if v_blob is not None:
v_rmd_flags = int(v_blob)
if v_rmd_flags & 1:
continue
if v_guid == guid:
expected_count += 1
if match_count == expected_count:
continue
diff_count = expected_count - match_count
if linkID & 1:
# If there's a backward link on binary multi-valued linked attribute,
# let the check on the forward link remedy the value.
# UNLESS, there is no forward link detected.
if match_count == 0:
error_count += 1
self.err_orphaned_backlink(obj.dn, attrname,
val, dsdb_dn.dn,
reverse_link_name,
reverse_syntax_oid)
continue
# Only warn here and let the forward link logic fix it.
self.report("WARNING: Link (back) mismatch for '%s' (%d) on '%s' to '%s' (%d) on '%s'" % (
attrname, expected_count, str(obj.dn),
reverse_link_name, match_count, str(dsdb_dn.dn)))
continue
assert not target_is_deleted
self.report("ERROR: Link (forward) mismatch for '%s' (%d) on '%s' to '%s' (%d) on '%s'" % (
attrname, expected_count, str(obj.dn),
reverse_link_name, match_count, str(dsdb_dn.dn)))
# Loop until the difference between the forward and
# the backward links is resolved.
while diff_count != 0:
error_count += 1
if diff_count > 0:
if match_count > 0 or diff_count > 1:
# TODO no method to fix these right now
self.report("ERROR: Can't fix missing "
"multi-valued backlinks on %s" % str(dsdb_dn.dn))
break
self.err_missing_backlink(obj, attrname,
obj.dn.extended_str(),
reverse_link_name,
dsdb_dn.dn)
diff_count -= 1
else:
self.err_orphaned_backlink(res[0].dn, reverse_link_name,
obj.dn.extended_str(), obj.dn,
attrname, syntax_oid)
diff_count += 1
return error_count
def find_repl_attid(self, repl, attid):
for o in repl.ctr.array:
if o.attid == attid:
return o
return None
def get_originating_time(self, val, attid):
'''Read metadata properties and return the originating time for
a given attributeId.
:return: the originating time or 0 if not found
'''
repl = ndr_unpack(drsblobs.replPropertyMetaDataBlob, val)
o = self.find_repl_attid(repl, attid)
if o is not None:
return o.originating_change_time
return 0
def process_metadata(self, dn, val):
'''Read metadata properties and list attributes in it.
raises KeyError if the attid is unknown.'''
set_att = set()
wrong_attids = set()
list_attid = []
in_schema_nc = dn.is_child_of(self.schema_dn)
repl = ndr_unpack(drsblobs.replPropertyMetaDataBlob, val)
for o in repl.ctr.array:
att = self.samdb_schema.get_lDAPDisplayName_by_attid(o.attid)
set_att.add(att.lower())
list_attid.append(o.attid)
correct_attid = self.samdb_schema.get_attid_from_lDAPDisplayName(att,
is_schema_nc=in_schema_nc)
if correct_attid != o.attid:
wrong_attids.add(o.attid)
return (set_att, list_attid, wrong_attids)
def fix_metadata(self, obj, attr):
'''re-write replPropertyMetaData elements for a single attribute for a
object. This is used to fix missing replPropertyMetaData elements'''
guid_str = str(ndr_unpack(misc.GUID, obj['objectGUID'][0]))
dn = ldb.Dn(self.samdb, "<GUID=%s>" % guid_str)
res = self.samdb.search(base=dn, scope=ldb.SCOPE_BASE, attrs=[attr],
controls=["search_options:1:2",
"show_recycled:1"])
msg = res[0]
nmsg = ldb.Message()
nmsg.dn = dn
nmsg[attr] = ldb.MessageElement(msg[attr], ldb.FLAG_MOD_REPLACE, attr)
if self.do_modify(nmsg, ["relax:0", "provision:0", "show_recycled:1"],
"Failed to fix metadata for attribute %s" % attr):
self.report("Fixed metadata for attribute %s" % attr)
def ace_get_effective_inherited_type(self, ace):
if ace.flags & security.SEC_ACE_FLAG_INHERIT_ONLY:
return None
check = False
if ace.type == security.SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT:
check = True
elif ace.type == security.SEC_ACE_TYPE_ACCESS_DENIED_OBJECT:
check = True
elif ace.type == security.SEC_ACE_TYPE_SYSTEM_AUDIT_OBJECT:
check = True
elif ace.type == security.SEC_ACE_TYPE_SYSTEM_ALARM_OBJECT:
check = True
if not check:
return None
if not ace.object.flags & security.SEC_ACE_INHERITED_OBJECT_TYPE_PRESENT:
return None
return str(ace.object.inherited_type)
def lookup_class_schemaIDGUID(self, cls):
if cls in self.class_schemaIDGUID:
return self.class_schemaIDGUID[cls]
flt = "(&(ldapDisplayName=%s)(objectClass=classSchema))" % cls
res = self.samdb.search(base=self.schema_dn,
expression=flt,
attrs=["schemaIDGUID"])
t = str(ndr_unpack(misc.GUID, res[0]["schemaIDGUID"][0]))
self.class_schemaIDGUID[cls] = t
return t
def process_sd(self, dn, obj):
sd_attr = "nTSecurityDescriptor"
sd_val = obj[sd_attr]
sd = ndr_unpack(security.descriptor, sd_val[0])
is_deleted = 'isDeleted' in obj and str(obj['isDeleted'][0]).upper() == 'TRUE'
if is_deleted:
# we don't fix deleted objects
return (sd, None)
sd_clean = security.descriptor()
sd_clean.owner_sid = sd.owner_sid
sd_clean.group_sid = sd.group_sid
sd_clean.type = sd.type
sd_clean.revision = sd.revision
broken = False
last_inherited_type = None
aces = []
if sd.sacl is not None:
aces = sd.sacl.aces
for i in range(0, len(aces)):
ace = aces[i]
if not ace.flags & security.SEC_ACE_FLAG_INHERITED_ACE:
sd_clean.sacl_add(ace)
continue
t = self.ace_get_effective_inherited_type(ace)
if t is None:
continue
if last_inherited_type is not None:
if t != last_inherited_type:
# if it inherited from more than
# one type it's very likely to be broken
#
# If not the recalculation will calculate
# the same result.
broken = True
continue
last_inherited_type = t
aces = []
if sd.dacl is not None:
aces = sd.dacl.aces
for i in range(0, len(aces)):
ace = aces[i]
if not ace.flags & security.SEC_ACE_FLAG_INHERITED_ACE:
sd_clean.dacl_add(ace)
continue
t = self.ace_get_effective_inherited_type(ace)
if t is None:
continue
if last_inherited_type is not None:
if t != last_inherited_type:
# if it inherited from more than
# one type it's very likely to be broken
#
# If not the recalculation will calculate
# the same result.
broken = True
continue
last_inherited_type = t
if broken:
return (sd_clean, sd)
if last_inherited_type is None:
# ok
return (sd, None)
cls = None
try:
cls = obj["objectClass"][-1]
except KeyError as e:
pass
if cls is None:
res = self.samdb.search(base=dn, scope=ldb.SCOPE_BASE,
attrs=["isDeleted", "objectClass"],
controls=["show_recycled:1"])
o = res[0]
is_deleted = 'isDeleted' in o and str(o['isDeleted'][0]).upper() == 'TRUE'
if is_deleted:
# we don't fix deleted objects
return (sd, None)
cls = o["objectClass"][-1]
t = self.lookup_class_schemaIDGUID(cls)
if t != last_inherited_type:
# broken
return (sd_clean, sd)
# ok
return (sd, None)
def err_wrong_sd(self, dn, sd, sd_broken):
'''re-write the SD due to incorrect inherited ACEs'''
sd_attr = "nTSecurityDescriptor"
sd_val = ndr_pack(sd)
sd_flags = security.SECINFO_DACL | security.SECINFO_SACL
if not self.confirm_all('Fix %s on %s?' % (sd_attr, dn), 'fix_ntsecuritydescriptor'):
self.report('Not fixing %s on %s\n' % (sd_attr, dn))
return
nmsg = ldb.Message()
nmsg.dn = dn
nmsg[sd_attr] = ldb.MessageElement(sd_val, ldb.FLAG_MOD_REPLACE, sd_attr)
if self.do_modify(nmsg, ["sd_flags:1:%d" % sd_flags],
"Failed to fix attribute %s" % sd_attr):
self.report("Fixed attribute '%s' of '%s'\n" % (sd_attr, dn))
def err_wrong_default_sd(self, dn, sd, diff):
'''re-write the SD due to not matching the default (optional mode for fixing an incorrect provision)'''
sd_attr = "nTSecurityDescriptor"
sd_val = ndr_pack(sd)
sd_flags = security.SECINFO_DACL | security.SECINFO_SACL
if sd.owner_sid is not None:
sd_flags |= security.SECINFO_OWNER
if sd.group_sid is not None:
sd_flags |= security.SECINFO_GROUP
if not self.confirm_all('Reset %s on %s back to provision default?\n%s' % (sd_attr, dn, diff), 'reset_all_well_known_acls'):
self.report('Not resetting %s on %s\n' % (sd_attr, dn))
return
m = ldb.Message()
m.dn = dn
m[sd_attr] = ldb.MessageElement(sd_val, ldb.FLAG_MOD_REPLACE, sd_attr)
if self.do_modify(m, ["sd_flags:1:%d" % sd_flags],
"Failed to reset attribute %s" % sd_attr):
self.report("Fixed attribute '%s' of '%s'\n" % (sd_attr, dn))
def err_missing_sd_owner(self, dn, sd):
'''re-write the SD due to a missing owner or group'''
sd_attr = "nTSecurityDescriptor"
sd_val = ndr_pack(sd)
sd_flags = security.SECINFO_OWNER | security.SECINFO_GROUP
if not self.confirm_all('Fix missing owner or group in %s on %s?' % (sd_attr, dn), 'fix_ntsecuritydescriptor_owner_group'):
self.report('Not fixing missing owner or group %s on %s\n' % (sd_attr, dn))
return
nmsg = ldb.Message()
nmsg.dn = dn
nmsg[sd_attr] = ldb.MessageElement(sd_val, ldb.FLAG_MOD_REPLACE, sd_attr)
# By setting the session_info to admin_session_info and
# setting the security.SECINFO_OWNER | security.SECINFO_GROUP
# flags we cause the descriptor module to set the correct
# owner and group on the SD, replacing the None/NULL values
# for owner_sid and group_sid currently present.
#
# The admin_session_info matches that used in provision, and
# is the best guess we can make for an existing object that
# hasn't had something specifically set.
#
# This is important for the dns related naming contexts.
self.samdb.set_session_info(self.admin_session_info)
if self.do_modify(nmsg, ["sd_flags:1:%d" % sd_flags],
"Failed to fix metadata for attribute %s" % sd_attr):
self.report("Fixed attribute '%s' of '%s'\n" % (sd_attr, dn))
self.samdb.set_session_info(self.system_session_info)
def is_expired_tombstone(self, dn, repl_val):
if self.check_expired_tombstones:
# This is not the default, it's just
# used to keep dbcheck tests work with
# old static provision dumps
return False
if dn in self.deleted_objects_containers:
# The Deleted Objects container will look like an expired
# tombstone
return False
repl = ndr_unpack(drsblobs.replPropertyMetaDataBlob, repl_val)
isDeleted = self.find_repl_attid(repl, drsuapi.DRSUAPI_ATTID_isDeleted)
delete_time = samba.nttime2unix(isDeleted.originating_change_time)
current_time = time.time()
tombstone_delta = self.tombstoneLifetime * (24 * 60 * 60)
delta = current_time - delete_time
if delta <= tombstone_delta:
return False
expunge_time = delete_time + tombstone_delta
delta_days = delta / (24 * 60 * 60)
if delta_days <= 2:
self.report("SKIPPING additional checks on object "
"%s which very recently "
"became an expired tombstone (normal)" % dn)
self.report("INFO: it is expected this will be expunged "
"by the next daily task some time after %s, "
"%d hours ago"
% (time.ctime(expunge_time), delta // (60 * 60)))
else:
self.report("SKIPPING: object %s is an expired tombstone" % dn)
self.report("INFO: it was expected this object would have "
"been expunged soon after"
"%s, %d days ago"
% (time.ctime(expunge_time), delta_days))
self.report("isDeleted: attid=0x%08x version=%d invocation=%s usn=%s (local=%s) at %s" % (
isDeleted.attid,
isDeleted.version,
isDeleted.originating_invocation_id,
isDeleted.originating_usn,
isDeleted.local_usn,
time.ctime(samba.nttime2unix(isDeleted.originating_change_time))))
self.expired_tombstones += 1
return True
def find_changes_after_deletion(self, repl_val):
repl = ndr_unpack(drsblobs.replPropertyMetaDataBlob, repl_val)
isDeleted = self.find_repl_attid(repl, drsuapi.DRSUAPI_ATTID_isDeleted)
delete_time = samba.nttime2unix(isDeleted.originating_change_time)
tombstone_delta = self.tombstoneLifetime * (24 * 60 * 60)
found = []
for o in repl.ctr.array:
if o.attid == drsuapi.DRSUAPI_ATTID_isDeleted:
continue
if o.local_usn <= isDeleted.local_usn:
continue
if o.originating_change_time <= isDeleted.originating_change_time:
continue
change_time = samba.nttime2unix(o.originating_change_time)
delta = change_time - delete_time
if delta <= tombstone_delta:
continue
# If the modification happened after the tombstone lifetime
# has passed, we have a bug as the object might be deleted
# already on other DCs and won't be able to replicate
# back
found.append(o)
return found, isDeleted
def has_changes_after_deletion(self, dn, repl_val):
found, isDeleted = self.find_changes_after_deletion(repl_val)
if len(found) == 0:
return False
def report_attid(o):
try:
attname = self.samdb_schema.get_lDAPDisplayName_by_attid(o.attid)
except KeyError:
attname = "<unknown:0x%x08x>" % o.attid
self.report("%s: attid=0x%08x version=%d invocation=%s usn=%s (local=%s) at %s" % (
attname, o.attid, o.version,
o.originating_invocation_id,
o.originating_usn,
o.local_usn,
time.ctime(samba.nttime2unix(o.originating_change_time))))
self.report("ERROR: object %s, has changes after deletion" % dn)
report_attid(isDeleted)
for o in found:
report_attid(o)
return True
def err_changes_after_deletion(self, dn, repl_val):
found, isDeleted = self.find_changes_after_deletion(repl_val)
in_schema_nc = dn.is_child_of(self.schema_dn)
rdn_attr = dn.get_rdn_name()
rdn_attid = self.samdb_schema.get_attid_from_lDAPDisplayName(rdn_attr,
is_schema_nc=in_schema_nc)
unexpected = []
for o in found:
if o.attid == rdn_attid:
continue
if o.attid == drsuapi.DRSUAPI_ATTID_name:
continue
if o.attid == drsuapi.DRSUAPI_ATTID_lastKnownParent:
continue
try:
attname = self.samdb_schema.get_lDAPDisplayName_by_attid(o.attid)
except KeyError:
attname = "<unknown:0x%x08x>" % o.attid
unexpected.append(attname)
if len(unexpected) > 0:
self.report('Unexpeted attributes: %s' % ",".join(unexpected))
self.report('Not fixing changes after deletion bug')
return
if not self.confirm_all('Delete broken tombstone object %s deleted %s days ago?' % (
dn, self.tombstoneLifetime), 'fix_changes_after_deletion_bug'):
self.report('Not fixing changes after deletion bug')
return
if self.do_delete(dn, ["relax:0"],
"Failed to remove DN %s" % dn):
self.report("Removed DN %s" % dn)
def has_replmetadata_zero_invocationid(self, dn, repl_meta_data):
repl = ndr_unpack(drsblobs.replPropertyMetaDataBlob,
repl_meta_data)
ctr = repl.ctr
found = False
for o in ctr.array:
# Search for a zero invocationID
if o.originating_invocation_id != misc.GUID("00000000-0000-0000-0000-000000000000"):
continue
found = True
self.report('''ERROR: on replPropertyMetaData of %s, the instanceType on attribute 0x%08x,
version %d changed at %s is 00000000-0000-0000-0000-000000000000,
but should be non-zero. Proposed fix is to set to our invocationID (%s).'''
% (dn, o.attid, o.version,
time.ctime(samba.nttime2unix(o.originating_change_time)),
self.samdb.get_invocation_id()))
return found
def err_replmetadata_zero_invocationid(self, dn, attr, repl_meta_data):
repl = ndr_unpack(drsblobs.replPropertyMetaDataBlob,
repl_meta_data)
ctr = repl.ctr
now = samba.unix2nttime(int(time.time()))
found = False
for o in ctr.array:
# Search for a zero invocationID
if o.originating_invocation_id != misc.GUID("00000000-0000-0000-0000-000000000000"):
continue
found = True
seq = self.samdb.sequence_number(ldb.SEQ_NEXT)
o.version = o.version + 1
o.originating_change_time = now
o.originating_invocation_id = misc.GUID(self.samdb.get_invocation_id())
o.originating_usn = seq
o.local_usn = seq
if found:
replBlob = ndr_pack(repl)
msg = ldb.Message()
msg.dn = dn
if not self.confirm_all('Fix %s on %s by setting originating_invocation_id on some elements to our invocationID %s?'
% (attr, dn, self.samdb.get_invocation_id()), 'fix_replmetadata_zero_invocationid'):
self.report('Not fixing zero originating_invocation_id in %s on %s\n' % (attr, dn))
return
nmsg = ldb.Message()
nmsg.dn = dn
nmsg[attr] = ldb.MessageElement(replBlob, ldb.FLAG_MOD_REPLACE, attr)
if self.do_modify(nmsg, ["local_oid:%s:0" % dsdb.DSDB_CONTROL_DBCHECK_MODIFY_RO_REPLICA,
"local_oid:1.3.6.1.4.1.7165.4.3.14:0"],
"Failed to fix attribute %s" % attr):
self.report("Fixed attribute '%s' of '%s'\n" % (attr, dn))
def err_replmetadata_unknown_attid(self, dn, attr, repl_meta_data):
repl = ndr_unpack(drsblobs.replPropertyMetaDataBlob,
repl_meta_data)
ctr = repl.ctr
for o in ctr.array:
# Search for an invalid attid
try:
att = self.samdb_schema.get_lDAPDisplayName_by_attid(o.attid)
except KeyError:
self.report('ERROR: attributeID 0X%0X is not known in our schema, not fixing %s on %s\n' % (o.attid, attr, dn))
return
def err_replmetadata_incorrect_attid(self, dn, attr, repl_meta_data, wrong_attids):
repl = ndr_unpack(drsblobs.replPropertyMetaDataBlob,
repl_meta_data)
fix = False
set_att = set()
remove_attid = set()
hash_att = {}
in_schema_nc = dn.is_child_of(self.schema_dn)
ctr = repl.ctr
# Sort the array, except for the last element. This strange
# construction, creating a new list, due to bugs in samba's
# array handling in IDL generated objects.
ctr.array = sorted(ctr.array[:], key=lambda o: o.attid)
# Now walk it in reverse, so we see the low (and so incorrect,
# the correct values are above 0x80000000) values first and
# remove the 'second' value we see.
for o in reversed(ctr.array):
print("%s: 0x%08x" % (dn, o.attid))
att = self.samdb_schema.get_lDAPDisplayName_by_attid(o.attid)
if att.lower() in set_att:
self.report('ERROR: duplicate attributeID values for %s in %s on %s\n' % (att, attr, dn))
if not self.confirm_all('Fix %s on %s by removing the duplicate value 0x%08x for %s (keeping 0x%08x)?'
% (attr, dn, o.attid, att, hash_att[att].attid),
'fix_replmetadata_duplicate_attid'):
self.report('Not fixing duplicate value 0x%08x for %s in %s on %s\n'
% (o.attid, att, attr, dn))
return
fix = True
remove_attid.add(o.attid)
# We want to set the metadata for the most recent
# update to have been applied locally, that is the metadata
# matching the (eg string) value in the attribute
if o.local_usn > hash_att[att].local_usn:
# This is always what we would have sent over DRS,
# because the DRS server will have sent the
# msDS-IntID, but with the values from both
# attribute entries.
hash_att[att].version = o.version
hash_att[att].originating_change_time = o.originating_change_time
hash_att[att].originating_invocation_id = o.originating_invocation_id
hash_att[att].originating_usn = o.originating_usn
hash_att[att].local_usn = o.local_usn
# Do not re-add the value to the set or overwrite the hash value
continue
hash_att[att] = o
set_att.add(att.lower())
# Generate a real list we can sort on properly
new_list = [o for o in ctr.array if o.attid not in remove_attid]
if (len(wrong_attids) > 0):
for o in new_list:
if o.attid in wrong_attids:
att = self.samdb_schema.get_lDAPDisplayName_by_attid(o.attid)
correct_attid = self.samdb_schema.get_attid_from_lDAPDisplayName(att, is_schema_nc=in_schema_nc)
self.report('ERROR: incorrect attributeID values in %s on %s\n' % (attr, dn))
if not self.confirm_all('Fix %s on %s by replacing incorrect value 0x%08x for %s (new 0x%08x)?'
% (attr, dn, o.attid, att, hash_att[att].attid), 'fix_replmetadata_wrong_attid'):
self.report('Not fixing incorrect value 0x%08x with 0x%08x for %s in %s on %s\n'
% (o.attid, correct_attid, att, attr, dn))
return
fix = True
o.attid = correct_attid
if fix:
# Sort the array, (we changed the value so must re-sort)
new_list[:] = sorted(new_list[:], key=lambda o: o.attid)
# If we did not already need to fix it, then ask about sorting
if not fix:
self.report('ERROR: unsorted attributeID values in %s on %s\n' % (attr, dn))
if not self.confirm_all('Fix %s on %s by sorting the attribute list?'
% (attr, dn), 'fix_replmetadata_unsorted_attid'):
self.report('Not fixing %s on %s\n' % (attr, dn))
return
# The actual sort done is done at the top of the function
ctr.count = len(new_list)
ctr.array = new_list
replBlob = ndr_pack(repl)
nmsg = ldb.Message()
nmsg.dn = dn
nmsg[attr] = ldb.MessageElement(replBlob, ldb.FLAG_MOD_REPLACE, attr)
if self.do_modify(nmsg, ["local_oid:%s:0" % dsdb.DSDB_CONTROL_DBCHECK_MODIFY_RO_REPLICA,
"local_oid:1.3.6.1.4.1.7165.4.3.14:0",
"local_oid:1.3.6.1.4.1.7165.4.3.25:0"],
"Failed to fix attribute %s" % attr):
self.report("Fixed attribute '%s' of '%s'\n" % (attr, dn))
def is_deleted_deleted_objects(self, obj):
faulty = False
if "description" not in obj:
self.report("ERROR: description not present on Deleted Objects container %s" % obj.dn)
faulty = True
if "showInAdvancedViewOnly" not in obj or str(obj['showInAdvancedViewOnly'][0]).upper() == 'FALSE':
self.report("ERROR: showInAdvancedViewOnly not present on Deleted Objects container %s" % obj.dn)
faulty = True
if "objectCategory" not in obj:
self.report("ERROR: objectCategory not present on Deleted Objects container %s" % obj.dn)
faulty = True
if "isCriticalSystemObject" not in obj or str(obj['isCriticalSystemObject'][0]).upper() == 'FALSE':
self.report("ERROR: isCriticalSystemObject not present on Deleted Objects container %s" % obj.dn)
faulty = True
if "isRecycled" in obj:
self.report("ERROR: isRecycled present on Deleted Objects container %s" % obj.dn)
faulty = True
if "isDeleted" in obj and str(obj['isDeleted'][0]).upper() == 'FALSE':
self.report("ERROR: isDeleted not set on Deleted Objects container %s" % obj.dn)
faulty = True
if "objectClass" not in obj or (len(obj['objectClass']) != 2 or
str(obj['objectClass'][0]) != 'top' or
str(obj['objectClass'][1]) != 'container'):
self.report("ERROR: objectClass incorrectly set on Deleted Objects container %s" % obj.dn)
faulty = True
if "systemFlags" not in obj or str(obj['systemFlags'][0]) != '-1946157056':
self.report("ERROR: systemFlags incorrectly set on Deleted Objects container %s" % obj.dn)
faulty = True
return faulty
def err_deleted_deleted_objects(self, obj):
nmsg = ldb.Message()
nmsg.dn = dn = obj.dn
if "description" not in obj:
nmsg["description"] = ldb.MessageElement("Container for deleted objects", ldb.FLAG_MOD_REPLACE, "description")
if "showInAdvancedViewOnly" not in obj:
nmsg["showInAdvancedViewOnly"] = ldb.MessageElement("TRUE", ldb.FLAG_MOD_REPLACE, "showInAdvancedViewOnly")
if "objectCategory" not in obj:
nmsg["objectCategory"] = ldb.MessageElement("CN=Container,%s" % self.schema_dn, ldb.FLAG_MOD_REPLACE, "objectCategory")
if "isCriticalSystemObject" not in obj:
nmsg["isCriticalSystemObject"] = ldb.MessageElement("TRUE", ldb.FLAG_MOD_REPLACE, "isCriticalSystemObject")
if "isRecycled" in obj:
nmsg["isRecycled"] = ldb.MessageElement("TRUE", ldb.FLAG_MOD_DELETE, "isRecycled")
nmsg["isDeleted"] = ldb.MessageElement("TRUE", ldb.FLAG_MOD_REPLACE, "isDeleted")
nmsg["systemFlags"] = ldb.MessageElement("-1946157056", ldb.FLAG_MOD_REPLACE, "systemFlags")
nmsg["objectClass"] = ldb.MessageElement(["top", "container"], ldb.FLAG_MOD_REPLACE, "objectClass")
if not self.confirm_all('Fix Deleted Objects container %s by restoring default attributes?'
% (dn), 'fix_deleted_deleted_objects'):
self.report('Not fixing missing/incorrect attributes on %s\n' % (dn))
return
if self.do_modify(nmsg, ["relax:0"],
"Failed to fix Deleted Objects container %s" % dn):
self.report("Fixed Deleted Objects container '%s'\n" % (dn))
def err_replica_locations(self, obj, cross_ref, attr):
nmsg = ldb.Message()
nmsg.dn = cross_ref
target = self.samdb.get_dsServiceName()
if self.samdb.am_rodc():
self.report('Not fixing %s %s for the RODC' % (attr, obj.dn))
return
if not self.confirm_all('Add yourself to the replica locations for %s?'
% (obj.dn), 'fix_replica_locations'):
self.report('Not fixing missing/incorrect attributes on %s\n' % (obj.dn))
return
nmsg[attr] = ldb.MessageElement(target, ldb.FLAG_MOD_ADD, attr)
if self.do_modify(nmsg, [], "Failed to add %s for %s" % (attr, obj.dn)):
self.report("Fixed %s for %s" % (attr, obj.dn))
def is_fsmo_role(self, dn):
if dn == self.samdb.domain_dn:
return True
if dn == self.infrastructure_dn:
return True
if dn == self.naming_dn:
return True
if dn == self.schema_dn:
return True
if dn == self.rid_dn:
return True
return False
def calculate_instancetype(self, dn):
instancetype = 0
nc_root = self.samdb.get_nc_root(dn)
if dn == nc_root:
instancetype |= dsdb.INSTANCE_TYPE_IS_NC_HEAD
try:
self.samdb.search(base=dn.parent(), scope=ldb.SCOPE_BASE, attrs=[], controls=["show_recycled:1"])
except ldb.LdbError as e4:
(enum, estr) = e4.args
if enum != ldb.ERR_NO_SUCH_OBJECT:
raise
else:
instancetype |= dsdb.INSTANCE_TYPE_NC_ABOVE
if self.write_ncs is not None and str(nc_root) in [str(x) for x in self.write_ncs]:
instancetype |= dsdb.INSTANCE_TYPE_WRITE
return instancetype
def get_wellknown_sd(self, dn):
for [sd_dn, descriptor_fn] in self.wellknown_sds:
if dn == sd_dn:
domain_sid = security.dom_sid(self.samdb.get_domain_sid())
return ndr_unpack(security.descriptor,
descriptor_fn(domain_sid,
name_map=self.name_map))
raise KeyError
def find_checkable_attrs(self, dn, requested_attrs):
"""A helper function for check_object() that calculates the list of
attributes that need to be checked, and returns that as a list
in the original case, and a set normalised to lowercase (for
easy existence checks).
"""
if requested_attrs is None:
attrs = ['*']
else:
attrs = list(requested_attrs)
lc_attrs = set(x.lower() for x in attrs)
def add_attr(a):
if a.lower() not in lc_attrs:
attrs.append(a)
lc_attrs.add(a.lower())
if ("dn" in lc_attrs or
"distinguishedname" in lc_attrs or
dn.get_rdn_name().lower() in lc_attrs):
attrs.append("name")
lc_attrs.add('name')
if 'name' in lc_attrs:
for a in (dn.get_rdn_name(),
"isDeleted",
"systemFlags"):
add_attr(a)
need_replPropertyMetaData = False
if '*' in lc_attrs:
need_replPropertyMetaData = True
else:
for a in attrs:
linkID, _ = self.get_attr_linkID_and_reverse_name(a)
if linkID == 0:
continue
if linkID & 1:
continue
need_replPropertyMetaData = True
break
if need_replPropertyMetaData:
add_attr("replPropertyMetaData")
add_attr("objectGUID")
return attrs, lc_attrs
def check_object(self, dn, requested_attrs=None):
'''check one object'''
if self.verbose:
self.report("Checking object %s" % dn)
# search attrs are used to find the attributes, lc_attrs are
# used for existence checks
search_attrs, lc_attrs = self.find_checkable_attrs(dn, requested_attrs)
try:
sd_flags = 0
sd_flags |= security.SECINFO_OWNER
sd_flags |= security.SECINFO_GROUP
sd_flags |= security.SECINFO_DACL
sd_flags |= security.SECINFO_SACL
res = self.samdb.search(base=dn, scope=ldb.SCOPE_BASE,
controls=[
"extended_dn:1:1",
"show_recycled:1",
"show_deleted:1",
"sd_flags:1:%d" % sd_flags,
"reveal_internals:0",
],
attrs=search_attrs)
except ldb.LdbError as e10:
(enum, estr) = e10.args
if enum == ldb.ERR_NO_SUCH_OBJECT:
if self.in_transaction:
self.report("ERROR: Object %s disappeared during check" % dn)
return 1
return 0
raise
if len(res) != 1:
self.report("ERROR: Object %s failed to load during check" % dn)
return 1
obj = res[0]
error_count = 0
set_attrs_from_md = set()
set_attrs_seen = set()
got_objectclass = False
nc_dn = self.samdb.get_nc_root(obj.dn)
try:
deleted_objects_dn = self.samdb.get_wellknown_dn(nc_dn,
samba.dsdb.DS_GUID_DELETED_OBJECTS_CONTAINER)
except KeyError:
# We have no deleted objects DN for schema, and we check for this above for the other
# NCs
deleted_objects_dn = None
object_rdn_attr = None
object_rdn_val = None
name_val = None
isDeleted = False
systemFlags = 0
repl_meta_data_val = None
for attrname in obj:
if attrname.lower() == 'isdeleted':
if str(obj[attrname][0]) != "FALSE":
isDeleted = True
if attrname.lower() == 'systemflags':
systemFlags = int(obj[attrname][0])
if attrname.lower() == 'replpropertymetadata':
repl_meta_data_val = obj[attrname][0]
if isDeleted and repl_meta_data_val:
if self.has_changes_after_deletion(dn, repl_meta_data_val):
error_count += 1
self.err_changes_after_deletion(dn, repl_meta_data_val)
return error_count
if self.is_expired_tombstone(dn, repl_meta_data_val):
return error_count
for attrname in obj:
if attrname == 'dn' or attrname == "distinguishedName":
continue
if attrname.lower() == 'objectclass':
got_objectclass = True
if attrname.lower() == "name":
if len(obj[attrname]) != 1:
error_count += 1
self.report("ERROR: Not fixing num_values(%d) for '%s' on '%s'" %
(len(obj[attrname]), attrname, str(obj.dn)))
else:
name_val = str(obj[attrname][0])
if attrname.lower() == str(obj.dn.get_rdn_name()).lower():
object_rdn_attr = attrname
if len(obj[attrname]) != 1:
error_count += 1
self.report("ERROR: Not fixing num_values(%d) for '%s' on '%s'" %
(len(obj[attrname]), attrname, str(obj.dn)))
else:
object_rdn_val = str(obj[attrname][0])
if attrname.lower() == 'replpropertymetadata':
if self.has_replmetadata_zero_invocationid(dn, obj[attrname][0]):
error_count += 1
self.err_replmetadata_zero_invocationid(dn, attrname, obj[attrname][0])
# We don't continue, as we may also have other fixes for this attribute
# based on what other attributes we see.
try:
(set_attrs_from_md, list_attid_from_md, wrong_attids) \
= self.process_metadata(dn, obj[attrname][0])
except KeyError:
error_count += 1
self.err_replmetadata_unknown_attid(dn, attrname, obj[attrname])
continue
if len(set_attrs_from_md) < len(list_attid_from_md) \
or len(wrong_attids) > 0 \
or sorted(list_attid_from_md) != list_attid_from_md:
error_count += 1
self.err_replmetadata_incorrect_attid(dn, attrname, obj[attrname][0], wrong_attids)
else:
# Here we check that the first attid is 0
# (objectClass).
if list_attid_from_md[0] != 0:
error_count += 1
self.report("ERROR: Not fixing incorrect initial attributeID in '%s' on '%s', it should be objectClass" %
(attrname, str(dn)))
continue
if attrname.lower() == 'ntsecuritydescriptor':
(sd, sd_broken) = self.process_sd(dn, obj)
if sd_broken is not None:
self.err_wrong_sd(dn, sd, sd_broken)
error_count += 1
continue
if sd.owner_sid is None or sd.group_sid is None:
self.err_missing_sd_owner(dn, sd)
error_count += 1
continue
if self.reset_well_known_acls:
try:
well_known_sd = self.get_wellknown_sd(dn)
except KeyError:
continue
current_sd = ndr_unpack(security.descriptor,
obj[attrname][0])
diff = get_diff_sds(well_known_sd, current_sd, security.dom_sid(self.samdb.get_domain_sid()))
if diff != "":
self.err_wrong_default_sd(dn, well_known_sd, diff)
error_count += 1
continue
continue
if attrname.lower() == 'objectclass':
normalised = self.samdb.dsdb_normalise_attributes(self.samdb_schema, attrname, obj[attrname])
# Do not consider the attribute incorrect if:
# - The sorted (alphabetically) list is the same, inclding case
# - The first and last elements are the same
#
# This avoids triggering an error due to
# non-determinism in the sort routine in (at least)
# 4.3 and earlier, and the fact that any AUX classes
# in these attributes are also not sorted when
# imported from Windows (they are just in the reverse
# order of last set)
if sorted(normalised) != sorted(obj[attrname]) \
or normalised[0] != obj[attrname][0] \
or normalised[-1] != obj[attrname][-1]:
self.err_normalise_mismatch_replace(dn, attrname, list(obj[attrname]))
error_count += 1
continue
if attrname.lower() == 'userparameters':
userparams = obj[attrname][0]
if userparams == b' ':
error_count += 1
self.err_short_userParameters(obj, attrname, obj[attrname])
continue
elif userparams[:16] == b'\x20\x00' * 8:
# This is the correct, normal prefix
continue
elif userparams[:20] == b'IAAgACAAIAAgACAAIAAg':
# this is the typical prefix from a windows migration
error_count += 1
self.err_base64_userParameters(obj, attrname, obj[attrname])
continue
#43:00:00:00:74:00:00:00:78
elif (userparams[1] != 0 and
userparams[3] != 0 and
userparams[5] != 0 and
userparams[7] != 0 and
userparams[9] != 0):
# This is a prefix that is not in UTF-16 format
# for the space or munged dialback prefix
error_count += 1
self.err_utf8_userParameters(obj, attrname, obj[attrname])
continue
elif len(userparams) % 2 != 0:
# This is a value that isn't even in length
error_count += 1
self.err_odd_userParameters(obj, attrname)
continue
elif (userparams[1] == 0 and
userparams[2] == 0 and
userparams[3] == 0 and
userparams[4] != 0 and
userparams[5] == 0):
# This is a prefix that would happen if a
# SAMR-written value was replicated from a Samba
# 4.1 server to a working server
error_count += 1
self.err_doubled_userParameters(obj, attrname, obj[attrname])
continue
if attrname.lower() == 'attributeid' or attrname.lower() == 'governsid':
if obj[attrname][0] in self.attribute_or_class_ids:
error_count += 1
self.report('Error: %s %s on %s already exists as an attributeId or governsId'
% (attrname, obj.dn, obj[attrname][0]))
else:
self.attribute_or_class_ids.add(obj[attrname][0])
# check for empty attributes
for val in obj[attrname]:
if val == b'':
self.err_empty_attribute(dn, attrname)
error_count += 1
continue
# get the syntax oid for the attribute, so we can can have
# special handling for some specific attribute types
try:
syntax_oid = self.samdb_schema.get_syntax_oid_from_lDAPDisplayName(attrname)
except Exception as msg:
self.err_unknown_attribute(obj, attrname)
error_count += 1
continue
linkID, reverse_link_name = self.get_attr_linkID_and_reverse_name(attrname)
flag = self.samdb_schema.get_systemFlags_from_lDAPDisplayName(attrname)
if (not flag & dsdb.DS_FLAG_ATTR_NOT_REPLICATED
and not flag & dsdb.DS_FLAG_ATTR_IS_CONSTRUCTED
and not linkID):
set_attrs_seen.add(attrname.lower())
if syntax_oid in [dsdb.DSDB_SYNTAX_BINARY_DN, dsdb.DSDB_SYNTAX_OR_NAME,
dsdb.DSDB_SYNTAX_STRING_DN, ldb.SYNTAX_DN]:
# it's some form of DN, do specialised checking on those
error_count += self.check_dn(obj, attrname, syntax_oid)
else:
values = set()
# check for incorrectly normalised attributes
for val in obj[attrname]:
values.add(val)
normalised = self.samdb.dsdb_normalise_attributes(self.samdb_schema, attrname, [val])
if len(normalised) != 1 or normalised[0] != val:
self.err_normalise_mismatch(dn, attrname, obj[attrname])
error_count += 1
break
if len(obj[attrname]) != len(values):
self.err_duplicate_values(dn, attrname, obj[attrname], list(values))
error_count += 1
break
if attrname.lower() == "instancetype":
calculated_instancetype = self.calculate_instancetype(dn)
if len(obj["instanceType"]) != 1 or int(obj["instanceType"][0]) != calculated_instancetype:
error_count += 1
self.err_wrong_instancetype(obj, calculated_instancetype)
if not got_objectclass and ("*" in lc_attrs or "objectclass" in lc_attrs):
error_count += 1
self.err_missing_objectclass(dn)
if ("*" in lc_attrs or "name" in lc_attrs):
if name_val is None:
error_count += 1
self.report("ERROR: Not fixing missing 'name' on '%s'" % (str(obj.dn)))
if object_rdn_attr is None:
error_count += 1
self.report("ERROR: Not fixing missing '%s' on '%s'" % (obj.dn.get_rdn_name(), str(obj.dn)))
if name_val is not None:
parent_dn = None
controls = ["show_recycled:1", "relax:0"]
if isDeleted:
if not (systemFlags & samba.dsdb.SYSTEM_FLAG_DISALLOW_MOVE_ON_DELETE):
parent_dn = deleted_objects_dn
controls += ["local_oid:%s:1" % dsdb.DSDB_CONTROL_DBCHECK_FIX_LINK_DN_NAME]
if parent_dn is None:
parent_dn = obj.dn.parent()
expected_dn = ldb.Dn(self.samdb, "RDN=RDN,%s" % (parent_dn))
expected_dn.set_component(0, obj.dn.get_rdn_name(), name_val)
if obj.dn == deleted_objects_dn:
expected_dn = obj.dn
if expected_dn != obj.dn:
error_count += 1
self.err_wrong_dn(obj, expected_dn, object_rdn_attr,
object_rdn_val, name_val, controls)
elif obj.dn.get_rdn_value() != object_rdn_val:
error_count += 1
self.report("ERROR: Not fixing %s=%r on '%s'" % (object_rdn_attr, object_rdn_val, str(obj.dn)))
show_dn = True
if repl_meta_data_val:
if obj.dn == deleted_objects_dn:
isDeletedAttId = 131120
# It's 29/12/9999 at 23:59:59 UTC as specified in MS-ADTS 7.1.1.4.2 Deleted Objects Container
expectedTimeDo = 2650466015990000000
originating = self.get_originating_time(repl_meta_data_val, isDeletedAttId)
if originating != expectedTimeDo:
if self.confirm_all("Fix isDeleted originating_change_time on '%s'" % str(dn), 'fix_time_metadata'):
nmsg = ldb.Message()
nmsg.dn = dn
nmsg["isDeleted"] = ldb.MessageElement("TRUE", ldb.FLAG_MOD_REPLACE, "isDeleted")
error_count += 1
self.samdb.modify(nmsg, controls=["provision:0"])
else:
self.report("Not fixing isDeleted originating_change_time on '%s'" % str(dn))
for att in set_attrs_seen.difference(set_attrs_from_md):
if show_dn:
self.report("On object %s" % dn)
show_dn = False
error_count += 1
self.report("ERROR: Attribute %s not present in replication metadata" % att)
if not self.confirm_all("Fix missing replPropertyMetaData element '%s'" % att, 'fix_all_metadata'):
self.report("Not fixing missing replPropertyMetaData element '%s'" % att)
continue
self.fix_metadata(obj, att)
if self.is_fsmo_role(dn):
if "fSMORoleOwner" not in obj and ("*" in lc_attrs or "fsmoroleowner" in lc_attrs):
self.err_no_fsmoRoleOwner(obj)
error_count += 1
try:
if dn != self.samdb.get_root_basedn() and str(dn.parent()) not in self.dn_set:
res = self.samdb.search(base=dn.parent(), scope=ldb.SCOPE_BASE,
controls=["show_recycled:1", "show_deleted:1"])
except ldb.LdbError as e11:
(enum, estr) = e11.args
if enum == ldb.ERR_NO_SUCH_OBJECT:
if isDeleted:
self.report("WARNING: parent object not found for %s" % (obj.dn))
self.report("Not moving to LostAndFound "
"(tombstone garbage collection in progress?)")
else:
self.err_missing_parent(obj)
error_count += 1
else:
raise
if dn in self.deleted_objects_containers and '*' in lc_attrs:
if self.is_deleted_deleted_objects(obj):
self.err_deleted_deleted_objects(obj)
error_count += 1
for (dns_part, msg) in self.dns_partitions:
if dn == dns_part and 'repsFrom' in obj:
location = "msDS-NC-Replica-Locations"
if self.samdb.am_rodc():
location = "msDS-NC-RO-Replica-Locations"
if location not in msg:
# There are no replica locations!
self.err_replica_locations(obj, msg.dn, location)
error_count += 1
continue
found = False
for loc in msg[location]:
if str(loc) == self.samdb.get_dsServiceName():
found = True
if not found:
# This DC is not in the replica locations
self.err_replica_locations(obj, msg.dn, location)
error_count += 1
if dn == self.server_ref_dn:
# Check we have a valid RID Set
if "*" in lc_attrs or "ridsetreferences" in lc_attrs:
if "rIDSetReferences" not in obj:
# NO RID SET reference
# We are RID master, allocate it.
error_count += 1
if self.is_rid_master:
# Allocate a RID Set
if self.confirm_all('Allocate the missing RID set for '
'RID master?',
'fix_missing_rid_set_master'):
# We don't have auto-transaction logic on
# extended operations, so we have to do it
# here.
self.samdb.transaction_start()
try:
self.samdb.create_own_rid_set()
except:
self.samdb.transaction_cancel()
raise
self.samdb.transaction_commit()
elif not self.samdb.am_rodc():
self.report("No RID Set found for this server: %s, "
"and we are not the RID Master (so can "
"not self-allocate)" % dn)
# Check some details of our own RID Set
#
# Note that the attributes have very bad names. From ridalloc.c:
#
# Note: the RID allocation attributes in AD are very badly named.
# Here is what we think they really do:
#
# in RID Set object:
# - rIDPreviousAllocationPool: the pool which a DC is currently
# pulling RIDs from. Managed by client DC
#
# - rIDAllocationPool: the pool that the DC will switch to next,
# when rIDPreviousAllocationPool is exhausted. Managed by RID
# Manager.
#
# - rIDNextRID: the last RID allocated by this DC. Managed by
# client DC
#
# in RID Manager object:
# - rIDAvailablePool: the pool where the RID Manager gets new rID
# pools from when it gets a EXOP_RID_ALLOC getncchanges call
# (or locally when the DC is the RID Manager)
if dn == self.rid_set_dn:
pool_attrs = ["rIDAllocationPool", "rIDPreviousAllocationPool"]
res = self.samdb.search(base=self.rid_set_dn, scope=ldb.SCOPE_BASE,
attrs=pool_attrs)
for pool_attr in pool_attrs:
if pool_attr not in res[0]:
continue
pool = int(res[0][pool_attr][0])
high = pool >> 32
low = 0xFFFFFFFF & pool
if pool != 0 and low >= high:
self.report("Invalid RID pool %d-%d, %d >= %d!" %
(low, high, low, high))
error_count += 1
if "rIDAllocationPool" not in res[0]:
self.report("No rIDAllocationPool found in %s" % dn)
error_count += 1
try:
next_free_rid, high = self.samdb.free_rid_bounds()
except ldb.LdbError as err:
enum, estr = err.args
self.report("Couldn't get available RIDs: %s" % estr)
error_count += 1
else:
# Check the remainder of this pool for conflicts. If
# ridalloc_allocate_rid() moves to a new pool, this
# will be above high, so we will stop.
domain_sid = self.samdb.get_domain_sid()
while next_free_rid <= high:
sid = "%s-%d" % (domain_sid, next_free_rid)
try:
res = self.samdb.search(base="<SID=%s>" % sid,
scope=ldb.SCOPE_BASE,
attrs=[])
except ldb.LdbError as e:
(enum, estr) = e.args
if enum != ldb.ERR_NO_SUCH_OBJECT:
raise
res = None
if res is not None:
self.report("SID %s for %s conflicts with our current "
"RID set in %s" % (sid, res[0].dn, dn))
error_count += 1
if self.confirm_all('Fix conflict between SID %s and '
'RID pool in %s by allocating a '
'new RID?'
% (sid, dn),
'fix_sid_rid_set_conflict'):
self.samdb.transaction_start()
# This will burn RIDs, which will move
# past the conflict. We then check again
# to see if the new RID conflicts, until
# the end of the current pool. We don't
# look at the next pool to avoid burning
# all RIDs in one go in some strange
# failure case.
try:
while True:
allocated_rid = self.samdb.allocate_rid()
if allocated_rid >= next_free_rid:
next_free_rid = allocated_rid + 1
break
except:
self.samdb.transaction_cancel()
raise
self.samdb.transaction_commit()
else:
break
else:
next_free_rid += 1
return error_count
################################################################
# check special @ROOTDSE attributes
def check_rootdse(self):
'''check the @ROOTDSE special object'''
dn = ldb.Dn(self.samdb, '@ROOTDSE')
if self.verbose:
self.report("Checking object %s" % dn)
res = self.samdb.search(base=dn, scope=ldb.SCOPE_BASE)
if len(res) != 1:
self.report("Object %s disappeared during check" % dn)
return 1
obj = res[0]
error_count = 0
# check that the dsServiceName is in GUID form
if 'dsServiceName' not in obj:
self.report('ERROR: dsServiceName missing in @ROOTDSE')
return error_count + 1
if not str(obj['dsServiceName'][0]).startswith('<GUID='):
self.report('ERROR: dsServiceName not in GUID form in @ROOTDSE')
error_count += 1
if not self.confirm('Change dsServiceName to GUID form?'):
return error_count
res = self.samdb.search(base=ldb.Dn(self.samdb, obj['dsServiceName'][0].decode('utf8')),
scope=ldb.SCOPE_BASE, attrs=['objectGUID'])
guid_str = str(ndr_unpack(misc.GUID, res[0]['objectGUID'][0]))
m = ldb.Message()
m.dn = dn
m['dsServiceName'] = ldb.MessageElement("<GUID=%s>" % guid_str,
ldb.FLAG_MOD_REPLACE, 'dsServiceName')
if self.do_modify(m, [], "Failed to change dsServiceName to GUID form", validate=False):
self.report("Changed dsServiceName to GUID form")
return error_count
###############################################
# re-index the database
def reindex_database(self):
'''re-index the whole database'''
m = ldb.Message()
m.dn = ldb.Dn(self.samdb, "@ATTRIBUTES")
m['add'] = ldb.MessageElement('NONE', ldb.FLAG_MOD_ADD, 'force_reindex')
m['delete'] = ldb.MessageElement('NONE', ldb.FLAG_MOD_DELETE, 'force_reindex')
return self.do_modify(m, [], 're-indexed database', validate=False)
###############################################
# reset @MODULES
def reset_modules(self):
'''reset @MODULES to that needed for current sam.ldb (to read a very old database)'''
m = ldb.Message()
m.dn = ldb.Dn(self.samdb, "@MODULES")
m['@LIST'] = ldb.MessageElement('samba_dsdb', ldb.FLAG_MOD_REPLACE, '@LIST')
return self.do_modify(m, [], 'reset @MODULES on database', validate=False)
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