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#!/usr/bin/python
import optparse
import sys
import base64
sys.path.insert(0, "bin/python")
import samba.getopt as options
from samba.dcerpc import drsblobs, misc
from samba.ndr import ndr_pack, ndr_unpack
from samba import Ldb
parser = optparse.OptionParser("demodirsync [options]")
sambaopts = options.SambaOptions(parser)
credopts = options.CredentialsOptions(parser)
parser.add_option_group(credopts)
parser.add_option("-b", type="string", metavar="BASE",
help="set base DN for the search")
parser.add_option("--host", type="string", metavar="HOST",
help="Ip of the host")
lp = sambaopts.get_loadparm()
creds = credopts.get_credentials(lp)
opts = parser.parse_args()[0]
if opts.host is None:
print("Usage: demodirsync.py --host HOST [-b BASE]")
sys.exit(1)
def printdirsync(ctl):
arr = ctl.split(':')
if arr[0] == 'dirsync':
print("Need to continue: %s" % arr[1])
cookie = ndr_unpack(drsblobs.ldapControlDirSyncCookie, base64.b64decode(arr[3]))
print("DC's NTDS guid: %s " % cookie.blob.guid1)
print("highest usn %s" % cookie.blob.highwatermark.highest_usn)
print("tmp highest usn %s" % cookie.blob.highwatermark.tmp_highest_usn)
print("reserved usn %s" % cookie.blob.highwatermark.reserved_usn)
if cookie.blob.extra_length > 0:
print("highest usn in extra %s" % cookie.blob.extra.ctr.cursors[0].highest_usn)
return cookie
remote_ldb = Ldb("ldap://" + opts.host + ":389", credentials=creds, lp=lp)
tab = []
if opts.b:
base = opts.b
else:
base = None
guid = None
(msgs, ctrls) = remote_ldb.search(expression="(samaccountname=administrator)", base=base, attrs=["objectClass"], controls=["dirsync:1:1:50"])
if (len(ctrls)):
for ctl in ctrls:
arr = ctl.split(':')
if arr[0] == 'dirsync':
cookie = ndr_unpack(drsblobs.ldapControlDirSyncCookie, base64.b64decode(arr[3]))
guid = cookie.blob.guid1
if not guid:
print("No dirsync control ... strange")
sys.exit(1)
print("")
print("Getting first guest without any cookie")
(msgs, ctrls) = remote_ldb.searchex(expression="(samaccountname=guest)", base=base, attrs=["objectClass"], controls=["dirsync:1:1:50"])
cookie = None
if (len(ctrls)):
for ctl in ctrls:
cookie = printdirsync(ctl)
print("Returned %d entries" % len(msgs))
savedcookie = cookie
print("")
print("Getting allusers with cookie")
controls = ["dirsync:1:1:50:%s" % base64.b64encode(ndr_pack(cookie)).decode('utf8')]
(msgs, ctrls) = remote_ldb.searchex(expression="(samaccountname=*)", base=base, attrs=["objectClass"], controls=controls)
if (len(ctrls)):
for ctl in ctrls:
printdirsync(ctl)
print("Returned %d entries" % len(msgs))
cookie = savedcookie
cookie.blob.guid1 = misc.GUID("128a99bf-e2df-4832-ac0a-1fb625e530db")
if cookie.blob.extra_length > 0:
cookie.blob.extra.ctr.cursors[0].source_dsa_invocation_id = misc.GUID("128a99bf-e2df-4832-ac0a-1fb625e530db")
print("")
print("Getting all the entries")
controls = ["dirsync:1:1:50:%s" % base64.b64encode(ndr_pack(cookie)).decode('utf8')]
(msgs, ctrls) = remote_ldb.searchex(expression="(objectclass=*)", base=base, controls=controls)
cont = 0
if (len(ctrls)):
for ctl in ctrls:
cookie = printdirsync(ctl)
if cookie is not None:
cont = (ctl.split(':'))[1]
print("Returned %d entries" % len(msgs))
usn = cookie.blob.highwatermark.tmp_highest_usn
if cookie.blob.extra_length > 0:
bigusn = cookie.blob.extra.ctr.cursors[0].highest_usn
else:
bigusn = usn + 1000
while (cont == "1"):
print("")
controls = ["dirsync:1:1:50:%s" % base64.b64encode(ndr_pack(cookie)).decode('utf8')]
(msgs, ctrls) = remote_ldb.searchex(expression="(objectclass=*)", base=base, controls=controls)
if (len(ctrls)):
for ctl in ctrls:
cookie = printdirsync(ctl)
if cookie is not None:
cont = (ctl.split(':'))[1]
print("Returned %d entries" % len(msgs))
print("")
print("Getting with cookie but usn changed to %d we should use the one in extra" % (bigusn - 1))
cookie.blob.highwatermark.highest_usn = 0
cookie.blob.highwatermark.tmp_highest_usn = usn - 2
if cookie.blob.extra_length > 0:
print("here")
cookie.blob.extra.ctr.cursors[0].highest_usn = bigusn - 1
controls = ["dirsync:1:1:50:%s" % base64.b64encode(ndr_pack(cookie)).decode('utf8')]
(msgs, ctrls) = remote_ldb.searchex(expression="(objectclass=*)", base=base, controls=controls)
if (len(ctrls)):
for ctl in ctrls:
cookie = printdirsync(ctl)
print("Returned %d entries" % len(msgs))
print("")
print("Getting with cookie but usn %d changed and extra/cursor GUID too" % (usn - 2))
print(" so that it's (tmp)highest_usn that drives the limit")
cookie.blob.highwatermark.highest_usn = 0
cookie.blob.highwatermark.tmp_highest_usn = usn - 2
if cookie.blob.extra_length > 0:
cookie.blob.extra.ctr.cursors[0].source_dsa_invocation_id = misc.GUID("128a99bf-e2df-4832-ac0a-1fb625e530db")
cookie.blob.extra.ctr.cursors[0].highest_usn = bigusn - 1
controls = ["dirsync:1:1:50:%s" % base64.b64encode(ndr_pack(cookie)).decode('utf8')]
(msgs, ctrls) = remote_ldb.searchex(expression="(objectclass=*)", base=base, controls=controls)
if (len(ctrls)):
for ctl in ctrls:
cookie = printdirsync(ctl)
print("Returned %d entries" % len(msgs))
print("")
print("Getting with cookie but usn changed to %d" % (usn - 2))
cookie.blob.highwatermark.highest_usn = 0
cookie.blob.highwatermark.tmp_highest_usn = (usn - 2)
if cookie.blob.extra_length > 0:
cookie.blob.extra.ctr.cursors[0].highest_usn = (usn - 2)
controls = ["dirsync:1:1:50:%s" % base64.b64encode(ndr_pack(cookie)).decode('utf8')]
(msgs, ctrls) = remote_ldb.searchex(expression="(objectclass=*)", base=base, controls=controls)
if (len(ctrls)):
for ctl in ctrls:
cookie = printdirsync(ctl)
print("Returned %d entries" % len(msgs))
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