# Samba4 AD database checker # # Copyright (C) Andrew Tridgell 2011 # Copyright (C) Matthieu Patou 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 . # 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.common 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 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, reset_well_known_acls=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_incorrect_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.reset_well_known_acls = reset_well_known_acls 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.dn_set = set() self.link_id_cache = {} self.name_map = {} try: res = samdb.search(base="CN=DnsAdmins,CN=Users,%s" % samdb.domain_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, (enum, estr): 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), 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)) 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]) # 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]) else: self.rid_set_dn = None 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 (enum, estr): if enum != ldb.ERR_NO_SUCH_OBJECT: raise pass def check_database(self, DN=None, scope=ldb.SCOPE_SUBTREE, controls=[], attrs=['*']): '''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, attrs=attrs) if DN is None: error_count += self.check_rootdse() 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, (enum, estr): 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, (enum, estr): 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, 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(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, 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, 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 modify 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, 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''' 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 errors''' normalised = self.samdb.dsdb_normalise_attributes(self.samdb_schema, attrname, values) 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 list(normalised) == values: return 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 attribute normalisation errors''' self.report("ERROR: Duplicate values for attribute '%s' in '%s'" % (attrname, dn)) self.report("Values contain a duplicate: [%s]/[%s]!" % (','.join(dup_values), ','.join(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 %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) target_nc_root = self.samdb.get_nc_root(dsdb_dn.dn) 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, (enum, estr): 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)) controls=["extended_dn:1:1", "show_recycled:1"] 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""" 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): """handle a DN string being incorrect""" 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 = res[0]["dsServiceName"][0] if not self.confirm_all('Sieze role %s onto current DC by adding fSMORoleOwner=%s' % (obj.dn, serviceName), 'seize_fsmo_role'): self.report("Not Siezing 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 sieze role %s onto current DC by adding fSMORoleOwner=%s" % (obj.dn, serviceName)): self.report("Siezed 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 %s'" % (obj.dn, self.samdb.get_nc_root(obj.dn))) def err_base64_userParameters(self, obj, attrname, value): '''handle a wrong userParameters''' 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 wrong userParameters''' self.report("ERROR: wrongly formatted userParameters on %s, should not be psudo-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 wrong userParameters''' 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'), 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): # This is 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 %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, 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, 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, (enum, estr): 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=)" % (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, (enum, estr): 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: # # ; # ; # ; # ; # ; # ; # ; # ; # ; # 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 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, 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="" % guidstr, scope=ldb.SCOPE_BASE, attrs=attrs, controls=["extended_dn:1:1", "show_recycled:1", "reveal_internals:0" ]) except ldb.LdbError, (enum, estr): 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) != 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 obj['isDeleted'][0].upper() == 'TRUE' target_is_deleted = 'isDeleted' in res[0] and res[0]['isDeleted'][0].upper() == 'TRUE' if is_deleted and not obj.dn 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, str(res[0]['replPropertyMetadata'])) 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 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 # 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) 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).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) 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, str(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, str(val)) obj = repl.ctr 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_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, str(sd_val)) is_deleted = 'isDeleted' in obj and 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, 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 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, sd_old, 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_old_val = ndr_pack(sd_old) 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 has_replmetadata_zero_invocationid(self, dn, repl_meta_data): repl = ndr_unpack(drsblobs.replPropertyMetaDataBlob, str(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, str(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, str(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, str(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 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 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 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 obj['objectClass'][0] != 'top' or 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 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 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, (enum, estr): 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 check_object(self, dn, attrs=['*']): '''check one object''' if self.verbose: self.report("Checking object %s" % dn) # If we modify the pass-by-reference attrs variable, then we get a # replPropertyMetadata for every object that we check. attrs = list(attrs) if "dn" in map(str.lower, attrs): attrs.append("name") if "distinguishedname" in map(str.lower, attrs): attrs.append("name") if str(dn.get_rdn_name()).lower() in map(str.lower, attrs): attrs.append("name") if 'name' in map(str.lower, attrs): attrs.append(dn.get_rdn_name()) attrs.append("isDeleted") attrs.append("systemFlags") need_replPropertyMetaData = False if '*' in 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: attrs.append("replPropertyMetaData") attrs.append("objectGUID") 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=attrs) except ldb.LdbError, (enum, estr): 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 str(attrname).lower() == 'isdeleted': if str(obj[attrname][0]) != "FALSE": isDeleted = True if str(attrname).lower() == 'systemflags': systemFlags = int(obj[attrname][0]) if str(attrname).lower() == 'replpropertymetadata': repl_meta_data_val = obj[attrname][0] for attrname in obj: if attrname == 'dn' or attrname == "distinguishedName": continue if str(attrname).lower() == 'objectclass': got_objectclass = True if str(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 = obj[attrname][0] if str(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 str(attrname).lower() == 'replpropertymetadata': if self.has_replmetadata_zero_invocationid(dn, obj[attrname]): error_count += 1 self.err_replmetadata_zero_invocationid(dn, attrname, obj[attrname]) # 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]) 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], 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 inital attributeID in '%s' on '%s', it should be objectClass" % (attrname, str(dn))) continue if str(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, str(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, current_sd, diff) error_count += 1 continue continue if str(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 str(attrname).lower() == 'userparameters': if len(obj[attrname][0]) == 1 and obj[attrname][0][0] == '\x20': error_count += 1 self.err_short_userParameters(obj, attrname, obj[attrname]) continue elif obj[attrname][0][:16] == '\x20\x00\x20\x00\x20\x00\x20\x00\x20\x00\x20\x00\x20\x00\x20\x00': # This is the correct, normal prefix continue elif obj[attrname][0][:20] == 'IAAgACAAIAAgACAAIAAg': # this is the typical prefix from a windows migration error_count += 1 self.err_base64_userParameters(obj, attrname, obj[attrname]) continue elif obj[attrname][0][1] != '\x00' and obj[attrname][0][3] != '\x00' and obj[attrname][0][5] != '\x00' and obj[attrname][0][7] != '\x00' and obj[attrname][0][9] != '\x00': # 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(obj[attrname][0]) % 2 != 0: # This is a value that isn't even in length error_count += 1 self.err_odd_userParameters(obj, attrname, obj[attrname]) continue elif obj[attrname][0][1] == '\x00' and obj[attrname][0][2] == '\x00' and obj[attrname][0][3] == '\x00' and obj[attrname][0][4] != '\x00' and obj[attrname][0][5] == '\x00': # 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 == '': 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, 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(str(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(str(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 str(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 attrs or "objectclass" in map(str.lower, attrs)): error_count += 1 self.err_missing_objectclass(dn) if ("*" in attrs or "name" in map(str.lower, 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 attrs or "fsmoroleowner" in map(str.lower, 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, (enum, estr): 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 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 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 attrs or "rIDSetReferences" in 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 if dn == self.rid_set_dn: res = self.samdb.search(base=self.rid_set_dn, scope=ldb.SCOPE_BASE, attrs=["rIDAllocationPool", "rIDPreviousAllocationPool", "rIDUsedPool", "rIDNextRID"]) if "rIDAllocationPool" not in res[0]: self.report("No rIDAllocationPool found in %s" % dn) error_count += 1 else: next_pool = int(res[0]["rIDAllocationPool"][0]) high = (0xFFFFFFFF00000000 & next_pool) >> 32 low = 0x00000000FFFFFFFF & next_pool if high <= low: self.report("Invalid RID set %d-%s, %d > %d!" % (low, high, low, high)) error_count += 1 if "rIDNextRID" in res[0]: next_free_rid = int(res[0]["rIDNextRID"][0]) else: next_free_rid = 0 if next_free_rid == 0: next_free_rid = low else: next_free_rid += 1 # 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. while next_free_rid <= high: sid = "%s-%d" % (self.samdb.get_domain_sid(), next_free_rid) try: res = self.samdb.search(base="" % sid, scope=ldb.SCOPE_BASE, attrs=[]) except ldb.LdbError, (enum, estr): 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 not 'dsServiceName' in obj: self.report('ERROR: dsServiceName missing in @ROOTDSE') return error_count+1 if not obj['dsServiceName'][0].startswith('" % 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)