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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# script to verify cached prefixMap on remote
# server against the prefixMap stored in Schema NC
#
# Copyright (C) Kamen Mazdrashki <kamenim@samba.org> 2010
#
# 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 os
import sys
from optparse import OptionParser
sys.path.insert(0, "bin/python")
import samba
import samba.getopt as options
from ldb import SCOPE_BASE, SCOPE_SUBTREE
from samba.dcerpc import drsuapi, misc, drsblobs
from samba.drs_utils import drs_DsBind
from samba.samdb import SamDB
from samba.auth import system_session
from samba.ndr import ndr_pack, ndr_unpack
def _samdb_fetch_pfm(samdb):
"""Fetch prefixMap stored in SamDB using LDB connection"""
res = samdb.search(base=samdb.get_schema_basedn(), expression="", scope=SCOPE_BASE, attrs=["*"])
assert len(res) == 1
pfm = ndr_unpack(drsblobs.prefixMapBlob,
str(res[0]['prefixMap']))
pfm_schi = _samdb_fetch_schi(samdb)
return (pfm.ctr, pfm_schi)
def _samdb_fetch_schi(samdb):
"""Fetch schemaInfo stored in SamDB using LDB connection"""
res = samdb.search(base=samdb.get_schema_basedn(), expression="", scope=SCOPE_BASE, attrs=["*"])
assert len(res) == 1
if 'schemaInfo' in res[0]:
pfm_schi = ndr_unpack(drsblobs.schemaInfoBlob,
str(res[0]['schemaInfo']))
else:
pfm_schi = drsblobs.schemaInfoBlob()
pfm_schi.marker = 0xFF
return pfm_schi
def _drs_fetch_pfm(server, samdb, creds, lp):
"""Fetch prefixMap using DRS interface"""
binding_str = "ncacn_ip_tcp:%s[print,seal]" % server
drs = drsuapi.drsuapi(binding_str, lp, creds)
(drs_handle, supported_extensions) = drs_DsBind(drs)
print("DRS Handle: %s" % drs_handle)
req8 = drsuapi.DsGetNCChangesRequest8()
dest_dsa = misc.GUID("9c637462-5b8c-4467-aef2-bdb1f57bc4ef")
replica_flags = 0
req8.destination_dsa_guid = dest_dsa
req8.source_dsa_invocation_id = misc.GUID(samdb.get_invocation_id())
req8.naming_context = drsuapi.DsReplicaObjectIdentifier()
req8.naming_context.dn = samdb.get_schema_basedn()
req8.highwatermark = drsuapi.DsReplicaHighWaterMark()
req8.highwatermark.tmp_highest_usn = 0
req8.highwatermark.reserved_usn = 0
req8.highwatermark.highest_usn = 0
req8.uptodateness_vector = None
req8.replica_flags = replica_flags
req8.max_object_count = 0
req8.max_ndr_size = 402116
req8.extended_op = 0
req8.fsmo_info = 0
req8.partial_attribute_set = None
req8.partial_attribute_set_ex = None
req8.mapping_ctr.num_mappings = 0
req8.mapping_ctr.mappings = None
(level, ctr) = drs.DsGetNCChanges(drs_handle, 8, req8)
pfm = ctr.mapping_ctr
# check for schemaInfo element
pfm_it = pfm.mappings[-1]
assert pfm_it.id_prefix == 0
assert pfm_it.oid.length == 21
s = "".join(chr(x) for x in pfm_it.oid.binary_oid)
pfm_schi = ndr_unpack(drsblobs.schemaInfoBlob, s)
assert pfm_schi.marker == 0xFF
# remove schemaInfo element
pfm.num_mappings -= 1
return (pfm, pfm_schi)
def _pfm_verify(drs_pfm, ldb_pfm):
errors = []
if drs_pfm.num_mappings != ldb_pfm.num_mappings:
errors.append("Different count of prefixes: drs = %d, ldb = %d"
% (drs_pfm.num_mappings, ldb_pfm.num_mappings))
count = min(drs_pfm.num_mappings, ldb_pfm.num_mappings)
for i in range(0, count):
it_err = []
drs_it = drs_pfm.mappings[i]
ldb_it = ldb_pfm.mappings[i]
if drs_it.id_prefix != ldb_it.id_prefix:
it_err.append("id_prefix")
if drs_it.oid.length != ldb_it.oid.length:
it_err.append("oid.length")
if drs_it.oid.binary_oid != ldb_it.oid.binary_oid:
it_err.append("oid.binary_oid")
if len(it_err):
errors.append("[%2d] differences in (%s)" % (i, it_err))
return errors
def _pfm_schi_verify(drs_schi, ldb_schi):
errors = []
print(drs_schi.revision)
print(drs_schi.invocation_id)
if drs_schi.marker != ldb_schi.marker:
errors.append("Different marker in schemaInfo: drs = %d, ldb = %d"
% (drs_schi.marker, ldb_schi.marker))
if drs_schi.revision != ldb_schi.revision:
errors.append("Different revision in schemaInfo: drs = %d, ldb = %d"
% (drs_schi.revision, ldb_schi.revision))
if drs_schi.invocation_id != ldb_schi.invocation_id:
errors.append("Different invocation_id in schemaInfo: drs = %s, ldb = %s"
% (drs_schi.invocation_id, ldb_schi.invocation_id))
return errors
########### main code ###########
if __name__ == "__main__":
# command line parsing
parser = OptionParser("pfm_verify.py [options] server")
sambaopts = options.SambaOptions(parser)
parser.add_option_group(sambaopts)
credopts = options.CredentialsOptionsDouble(parser)
parser.add_option_group(credopts)
(opts, args) = parser.parse_args()
lp = sambaopts.get_loadparm()
creds = credopts.get_credentials(lp)
if len(args) != 1:
if "DC_SERVER" not in os.environ.keys():
parser.error("You must supply a server")
args.append(os.environ["DC_SERVER"])
if creds.is_anonymous():
parser.error("You must supply credentials")
server = args[0]
samdb = SamDB(url="ldap://%s" % server,
session_info=system_session(lp),
credentials=creds, lp=lp)
exit_code = 0
(drs_pfm, drs_schi) = _drs_fetch_pfm(server, samdb, creds, lp)
(ldb_pfm, ldb_schi) = _samdb_fetch_pfm(samdb)
# verify prefixMaps
errors = _pfm_verify(drs_pfm, ldb_pfm)
if len(errors):
print("prefixMap verification errors:")
print("%s" % errors)
exit_code = 1
# verify schemaInfos
errors = _pfm_schi_verify(drs_schi, ldb_schi)
if len(errors):
print("schemaInfo verification errors:")
print("%s" % errors)
exit_code = 2
if exit_code != 0:
sys.exit(exit_code)
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