source4/dsdb/tests/python/user_account_control.py

   1 #!/usr/bin/env python
   2 # -*- coding: utf-8 -*-
   3 # This tests the restrictions on userAccountControl that apply even if write access is permitted
   4 #
   5 # Copyright Samuel Cabrero 2014 <samuelcabrero@kernevil.me>
   6 # Copyright Andrew Bartlett 2014 <abartlet@samba.org>
   7 #
   8 # Licenced under the GPLv3
   9 #
  10
  11 import optparse
  12 import sys
  13 import unittest
  14 import samba
  15 import samba.getopt as options
  16 import samba.tests
  17 import ldb
  18 import base64
  19
  20 sys.path.insert(0, "bin/python")
  21 from samba.tests.subunitrun import TestProgram, SubunitOptions
  22
  23 from subunit.run import SubunitTestRunner
  24 from samba.auth import system_session
  25 from samba.samdb import SamDB
  26 from samba.dcerpc import samr, security, lsa
  27 from samba.credentials import Credentials
  28 from samba.ndr import ndr_unpack, ndr_pack
  29 from samba.tests import delete_force
  30 from samba import gensec, sd_utils
  31 from samba.credentials import DONT_USE_KERBEROS
  32 from ldb import SCOPE_SUBTREE, SCOPE_BASE, LdbError
  33 from ldb import Message, MessageElement, Dn
  34 from ldb import FLAG_MOD_ADD, FLAG_MOD_REPLACE, FLAG_MOD_DELETE
  35 from samba.dsdb import UF_SCRIPT, UF_ACCOUNTDISABLE, UF_00000004, UF_HOMEDIR_REQUIRED, \
  36     UF_LOCKOUT,UF_PASSWD_NOTREQD, UF_PASSWD_CANT_CHANGE, UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED,\
  37     UF_TEMP_DUPLICATE_ACCOUNT, UF_NORMAL_ACCOUNT, UF_00000400, UF_INTERDOMAIN_TRUST_ACCOUNT, \
  38     UF_WORKSTATION_TRUST_ACCOUNT, UF_SERVER_TRUST_ACCOUNT, UF_00004000, \
  39     UF_00008000, UF_DONT_EXPIRE_PASSWD, UF_MNS_LOGON_ACCOUNT, UF_SMARTCARD_REQUIRED, \
  40     UF_TRUSTED_FOR_DELEGATION, UF_NOT_DELEGATED, UF_USE_DES_KEY_ONLY, UF_DONT_REQUIRE_PREAUTH, \
  41     UF_PASSWORD_EXPIRED, UF_TRUSTED_TO_AUTHENTICATE_FOR_DELEGATION, UF_NO_AUTH_DATA_REQUIRED, \
  42     UF_PARTIAL_SECRETS_ACCOUNT, UF_USE_AES_KEYS
  43
  44
  45 parser = optparse.OptionParser("machine_account_privilege.py [options] <host>")
  46 sambaopts = options.SambaOptions(parser)
  47 parser.add_option_group(sambaopts)
  48 parser.add_option_group(options.VersionOptions(parser))
  49
  50 # use command line creds if available
  51 credopts = options.CredentialsOptions(parser)
  52 parser.add_option_group(credopts)
  53 opts, args = parser.parse_args()
  54
  55 if len(args) < 1:
  56     parser.print_usage()
  57     sys.exit(1)
  58 host = args[0]
  59
  60 if not "://" in host:
  61     ldaphost = "ldap://%s" % host
  62 else:
  63     ldaphost = host
  64     start = host.rindex("://")
  65     host = host.lstrip(start+3)
  66
  67 lp = sambaopts.get_loadparm()
  68 creds = credopts.get_credentials(lp)
  69 creds.set_gensec_features(creds.get_gensec_features() | gensec.FEATURE_SEAL)
  70
  71 bits = [UF_SCRIPT, UF_ACCOUNTDISABLE, UF_00000004, UF_HOMEDIR_REQUIRED,
  72         UF_LOCKOUT,UF_PASSWD_NOTREQD, UF_PASSWD_CANT_CHANGE,
  73         UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED,
  74         UF_TEMP_DUPLICATE_ACCOUNT, UF_NORMAL_ACCOUNT, UF_00000400,
  75         UF_INTERDOMAIN_TRUST_ACCOUNT,
  76         UF_WORKSTATION_TRUST_ACCOUNT, UF_SERVER_TRUST_ACCOUNT, UF_00004000,
  77         UF_00008000, UF_DONT_EXPIRE_PASSWD, UF_MNS_LOGON_ACCOUNT, UF_SMARTCARD_REQUIRED,
  78         UF_TRUSTED_FOR_DELEGATION, UF_NOT_DELEGATED, UF_USE_DES_KEY_ONLY,
  79         UF_DONT_REQUIRE_PREAUTH,
  80         UF_PASSWORD_EXPIRED, UF_TRUSTED_TO_AUTHENTICATE_FOR_DELEGATION,
  81         UF_NO_AUTH_DATA_REQUIRED,
  82         UF_PARTIAL_SECRETS_ACCOUNT, UF_USE_AES_KEYS,
  83         int("0x10000000", 16), int("0x20000000", 16), int("0x40000000", 16), int("0x80000000", 16)]
  84
  85 account_types = set([UF_NORMAL_ACCOUNT, UF_WORKSTATION_TRUST_ACCOUNT, UF_SERVER_TRUST_ACCOUNT])
  86
  87
  88 class UserAccountControlTests(samba.tests.TestCase):
  89     def add_computer_ldap(self, computername, others=None, samdb=None):
  90         if samdb is None:
  91             samdb = self.samdb
  92         dn = "CN=%s,OU=test_computer_ou1,%s" % (computername, self.base_dn)
  93         domainname = ldb.Dn(self.samdb, self.samdb.domain_dn()).canonical_str().replace("/", "")
  94         samaccountname = "%s$" % computername
  95         dnshostname = "%s.%s" % (computername, domainname)
  96         msg_dict = {
  97             "dn": dn,
  98             "objectclass": "computer"}
  99         if others is not None:
 100             msg_dict = dict(msg_dict.items() + others.items())
 101
 102         msg = ldb.Message.from_dict(self.samdb, msg_dict )
 103         msg["sAMAccountName"] = samaccountname
 104
 105         print "Adding computer account %s" % computername
 106         samdb.add(msg)
 107
 108     def get_creds(self, target_username, target_password):
 109         creds_tmp = Credentials()
 110         creds_tmp.set_username(target_username)
 111         creds_tmp.set_password(target_password)
 112         creds_tmp.set_domain(creds.get_domain())
 113         creds_tmp.set_realm(creds.get_realm())
 114         creds_tmp.set_workstation(creds.get_workstation())
 115         creds_tmp.set_gensec_features(creds_tmp.get_gensec_features()
 116                                       | gensec.FEATURE_SEAL)
 117         creds_tmp.set_kerberos_state(DONT_USE_KERBEROS) # kinit is too expensive to use in a tight loop
 118         return creds_tmp
 119
 120     def setUp(self):
 121         super(UserAccountControlTests, self).setUp()
 122         self.admin_creds = creds
 123         self.admin_samdb = SamDB(url=ldaphost,
 124                                  session_info=system_session(),
 125                                  credentials=self.admin_creds, lp=lp)
 126
 127         self.unpriv_user = "testuser1"
 128         self.unpriv_user_pw = "samba123@"
 129         self.unpriv_creds = self.get_creds(self.unpriv_user, self.unpriv_user_pw)
 130
 131         self.admin_samdb.newuser(self.unpriv_user, self.unpriv_user_pw)
 132         res = self.admin_samdb.search("CN=%s,CN=Users,%s" % (self.unpriv_user, self.admin_samdb.domain_dn()),
 133                                       scope=SCOPE_BASE,
 134                                       attrs=["objectSid"])
 135         self.assertEqual(1, len(res))
 136
 137         self.unpriv_user_sid = ndr_unpack(security.dom_sid, res[0]["objectSid"][0])
 138         self.unpriv_user_dn = res[0].dn
 139
 140         self.samdb = SamDB(url=ldaphost, credentials=self.unpriv_creds, lp=lp)
 141         self.domain_sid = security.dom_sid(self.samdb.get_domain_sid())
 142         self.base_dn = self.samdb.domain_dn()
 143
 144         self.samr = samr.samr("ncacn_ip_tcp:%s[sign]" % host, lp, self.unpriv_creds)
 145         self.samr_handle = self.samr.Connect2(None, security.SEC_FLAG_MAXIMUM_ALLOWED)
 146         self.samr_domain = self.samr.OpenDomain(self.samr_handle, security.SEC_FLAG_MAXIMUM_ALLOWED, self.domain_sid)
 147
 148         self.sd_utils = sd_utils.SDUtils(self.admin_samdb)
 149
 150         self.admin_samdb.create_ou("OU=test_computer_ou1," + self.base_dn)
 151         self.unpriv_user_sid = self.sd_utils.get_object_sid(self.unpriv_user_dn)
 152         mod = "(OA;;CC;bf967a86-0de6-11d0-a285-00aa003049e2;;%s)" % str(self.unpriv_user_sid)
 153
 154         old_sd = self.sd_utils.read_sd_on_dn("OU=test_computer_ou1," + self.base_dn)
 155
 156         self.sd_utils.dacl_add_ace("OU=test_computer_ou1," + self.base_dn, mod)
 157
 158         self.add_computer_ldap("testcomputer-t")
 159
 160         self.sd_utils.modify_sd_on_dn("OU=test_computer_ou1," + self.base_dn, old_sd)
 161
 162         self.computernames = ["testcomputer-0"]
 163
 164         # Get the SD of the template account, then force it to match
 165         # what we expect for SeMachineAccountPrivilege accounts, so we
 166         # can confirm we created the accounts correctly
 167         self.sd_reference_cc = self.sd_utils.read_sd_on_dn("CN=testcomputer-t,OU=test_computer_ou1,%s" % (self.base_dn))
 168
 169         self.sd_reference_modify = self.sd_utils.read_sd_on_dn("CN=testcomputer-t,OU=test_computer_ou1,%s" % (self.base_dn))
 170         for ace in self.sd_reference_modify.dacl.aces:
 171             if ace.type == security.SEC_ACE_TYPE_ACCESS_ALLOWED and ace.trustee == self.unpriv_user_sid:
 172                 ace.access_mask = ace.access_mask | security.SEC_ADS_SELF_WRITE | security.SEC_ADS_WRITE_PROP
 173
 174         # Now reconnect without domain admin rights
 175         self.samdb = SamDB(url=ldaphost, credentials=self.unpriv_creds, lp=lp)
 176
 177
 178     def tearDown(self):
 179         super(UserAccountControlTests, self).tearDown()
 180         for computername in self.computernames:
 181             delete_force(self.admin_samdb, "CN=%s,OU=test_computer_ou1,%s" % (computername, self.base_dn))
 182         delete_force(self.admin_samdb, "CN=testcomputer-t,OU=test_computer_ou1,%s" % (self.base_dn))
 183         delete_force(self.admin_samdb, "OU=test_computer_ou1,%s" % (self.base_dn))
 184         delete_force(self.admin_samdb, "CN=%s,CN=Users,%s" % (self.unpriv_user, self.base_dn))
 185
 186     def test_add_computer_sd_cc(self):
 187         user_sid = self.sd_utils.get_object_sid(self.unpriv_user_dn)
 188         mod = "(OA;;CC;bf967a86-0de6-11d0-a285-00aa003049e2;;%s)" % str(user_sid)
 189
 190         old_sd = self.sd_utils.read_sd_on_dn("OU=test_computer_ou1," + self.base_dn)
 191
 192         self.sd_utils.dacl_add_ace("OU=test_computer_ou1," + self.base_dn, mod)
 193
 194         computername=self.computernames[0]
 195         sd = ldb.MessageElement((ndr_pack(self.sd_reference_modify)),
 196                                 ldb.FLAG_MOD_ADD,
 197                                 "nTSecurityDescriptor")
 198         self.add_computer_ldap(computername,
 199                                others={"nTSecurityDescriptor": sd})
 200
 201         res = self.admin_samdb.search("%s" % self.base_dn,
 202                                       expression="(&(objectClass=computer)(samAccountName=%s$))" % computername,
 203                                       scope=SCOPE_SUBTREE,
 204                                       attrs=["ntSecurityDescriptor"])
 205
 206         desc = res[0]["nTSecurityDescriptor"][0]
 207         desc = ndr_unpack(security.descriptor, desc, allow_remaining=True)
 208
 209         sddl = desc.as_sddl(self.domain_sid)
 210         self.assertEqual(self.sd_reference_modify.as_sddl(self.domain_sid), sddl)
 211
 212         m = ldb.Message()
 213         m.dn = res[0].dn
 214         m["description"]= ldb.MessageElement(
 215             ("A description"), ldb.FLAG_MOD_REPLACE,
 216             "description")
 217         self.samdb.modify(m)
 218
 219         m = ldb.Message()
 220         m.dn = res[0].dn
 221         m["userAccountControl"] = ldb.MessageElement(str(samba.dsdb.UF_SERVER_TRUST_ACCOUNT),
 222                                                      ldb.FLAG_MOD_REPLACE, "userAccountControl")
 223         try:
 224             self.samdb.modify(m)
 225             self.fail("Unexpectedly able to set userAccountControl to be a DC on %s" % m.dn)
 226         except LdbError, (enum, estr):
 227             self.assertEqual(ldb.ERR_INSUFFICIENT_ACCESS_RIGHTS, enum)
 228
 229         m = ldb.Message()
 230         m.dn = res[0].dn
 231         m["userAccountControl"] = ldb.MessageElement(str(samba.dsdb.UF_WORKSTATION_TRUST_ACCOUNT|samba.dsdb.UF_PARTIAL_SECRETS_ACCOUNT),
 232                                                      ldb.FLAG_MOD_REPLACE, "userAccountControl")
 233         try:
 234             self.samdb.modify(m)
 235             self.fail("Unexpectedly able to set userAccountControl to be an RODC on %s" % m.dn)
 236         except LdbError, (enum, estr):
 237             self.assertEqual(ldb.ERR_INSUFFICIENT_ACCESS_RIGHTS, enum)
 238
 239         m = ldb.Message()
 240         m.dn = res[0].dn
 241         m["userAccountControl"] = ldb.MessageElement(str(samba.dsdb.UF_WORKSTATION_TRUST_ACCOUNT),
 242                                                      ldb.FLAG_MOD_REPLACE, "userAccountControl")
 243         self.samdb.modify(m)
 244
 245         m = ldb.Message()
 246         m.dn = res[0].dn
 247         m["primaryGroupID"] = ldb.MessageElement(str(security.DOMAIN_RID_ADMINS),
 248                                                  ldb.FLAG_MOD_REPLACE, "primaryGroupID")
 249         try:
 250             self.samdb.modify(m)
 251         except LdbError, (enum, estr):
 252             self.assertEqual(ldb.ERR_UNWILLING_TO_PERFORM, enum)
 253             return
 254         self.fail()
 255
 256     def test_mod_computer_cc(self):
 257         user_sid = self.sd_utils.get_object_sid(self.unpriv_user_dn)
 258         mod = "(OA;;CC;bf967a86-0de6-11d0-a285-00aa003049e2;;%s)" % str(user_sid)
 259
 260         old_sd = self.sd_utils.read_sd_on_dn("OU=test_computer_ou1," + self.base_dn)
 261
 262         self.sd_utils.dacl_add_ace("OU=test_computer_ou1," + self.base_dn, mod)
 263
 264         computername=self.computernames[0]
 265         self.add_computer_ldap(computername)
 266
 267         res = self.admin_samdb.search("%s" % self.base_dn,
 268                                       expression="(&(objectClass=computer)(samAccountName=%s$))" % computername,
 269                                       scope=SCOPE_SUBTREE,
 270                                       attrs=[])
 271
 272         m = ldb.Message()
 273         m.dn = res[0].dn
 274         m["description"]= ldb.MessageElement(
 275             ("A description"), ldb.FLAG_MOD_REPLACE,
 276             "description")
 277         self.samdb.modify(m)
 278
 279         m = ldb.Message()
 280         m.dn = res[0].dn
 281         m["userAccountControl"] = ldb.MessageElement(str(samba.dsdb.UF_WORKSTATION_TRUST_ACCOUNT|samba.dsdb.UF_PARTIAL_SECRETS_ACCOUNT),
 282                                                      ldb.FLAG_MOD_REPLACE, "userAccountControl")
 283         try:
 284             self.samdb.modify(m)
 285             self.fail("Unexpectedly able to set userAccountControl on %s" % m.dn)
 286         except LdbError, (enum, estr):
 287             self.assertEqual(ldb.ERR_INSUFFICIENT_ACCESS_RIGHTS, enum)
 288
 289         m = ldb.Message()
 290         m.dn = res[0].dn
 291         m["userAccountControl"] = ldb.MessageElement(str(samba.dsdb.UF_SERVER_TRUST_ACCOUNT),
 292                                                      ldb.FLAG_MOD_REPLACE, "userAccountControl")
 293         try:
 294              self.samdb.modify(m)
 295              self.fail()
 296         except LdbError, (enum, estr):
 297              self.assertEqual(ldb.ERR_INSUFFICIENT_ACCESS_RIGHTS, enum)
 298
 299         m = ldb.Message()
 300         m.dn = res[0].dn
 301         m["userAccountControl"] = ldb.MessageElement(str(samba.dsdb.UF_NORMAL_ACCOUNT),
 302                                                      ldb.FLAG_MOD_REPLACE, "userAccountControl")
 303         self.samdb.modify(m)
 304
 305         m = ldb.Message()
 306         m.dn = res[0].dn
 307         m["userAccountControl"] = ldb.MessageElement(str(samba.dsdb.UF_WORKSTATION_TRUST_ACCOUNT),
 308                                                      ldb.FLAG_MOD_REPLACE, "userAccountControl")
 309         self.samdb.modify(m)
 310
 311     def test_admin_mod_uac(self):
 312         computername=self.computernames[0]
 313         self.add_computer_ldap(computername, samdb=self.admin_samdb)
 314
 315         res = self.admin_samdb.search("%s" % self.base_dn,
 316                                       expression="(&(objectClass=computer)(samAccountName=%s$))" % computername,
 317                                       scope=SCOPE_SUBTREE,
 318                                       attrs=["userAccountControl"])
 319
 320         self.assertEqual(int(res[0]["userAccountControl"][0]), UF_NORMAL_ACCOUNT|UF_ACCOUNTDISABLE|UF_PASSWD_NOTREQD)
 321
 322         m = ldb.Message()
 323         m.dn = res[0].dn
 324         m["userAccountControl"] = ldb.MessageElement(str(UF_WORKSTATION_TRUST_ACCOUNT|UF_PARTIAL_SECRETS_ACCOUNT|UF_TRUSTED_FOR_DELEGATION),
 325                                                      ldb.FLAG_MOD_REPLACE, "userAccountControl")
 326         try:
 327             self.admin_samdb.modify(m)
 328             self.fail("Unexpectedly able to set userAccountControl to UF_WORKSTATION_TRUST_ACCOUNT|UF_PARTIAL_SECRETS_ACCOUNT|UF_TRUSTED_FOR_DELEGATION on %s" % m.dn)
 329         except LdbError, (enum, estr):
 330             self.assertEqual(ldb.ERR_OTHER, enum)
 331
 332         m = ldb.Message()
 333         m.dn = res[0].dn
 334         m["userAccountControl"] = ldb.MessageElement(str(UF_WORKSTATION_TRUST_ACCOUNT|UF_PARTIAL_SECRETS_ACCOUNT),
 335                                                      ldb.FLAG_MOD_REPLACE, "userAccountControl")
 336         self.admin_samdb.modify(m)
 337
 338         res = self.admin_samdb.search("%s" % self.base_dn,
 339                                       expression="(&(objectClass=computer)(samAccountName=%s$))" % computername,
 340                                       scope=SCOPE_SUBTREE,
 341                                       attrs=["userAccountControl"])
 342
 343         self.assertEqual(int(res[0]["userAccountControl"][0]), UF_WORKSTATION_TRUST_ACCOUNT|UF_PARTIAL_SECRETS_ACCOUNT)
 344         m = ldb.Message()
 345         m.dn = res[0].dn
 346         m["userAccountControl"] = ldb.MessageElement(str(UF_ACCOUNTDISABLE),
 347                                                      ldb.FLAG_MOD_REPLACE, "userAccountControl")
 348         self.admin_samdb.modify(m)
 349
 350         res = self.admin_samdb.search("%s" % self.base_dn,
 351                                       expression="(&(objectClass=computer)(samAccountName=%s$))" % computername,
 352                                       scope=SCOPE_SUBTREE,
 353                                       attrs=["userAccountControl"])
 354
 355         self.assertEqual(int(res[0]["userAccountControl"][0]), UF_NORMAL_ACCOUNT| UF_ACCOUNTDISABLE)
 356
 357
 358     def test_uac_bits_set(self):
 359         user_sid = self.sd_utils.get_object_sid(self.unpriv_user_dn)
 360         mod = "(OA;;CC;bf967a86-0de6-11d0-a285-00aa003049e2;;%s)" % str(user_sid)
 361
 362         old_sd = self.sd_utils.read_sd_on_dn("OU=test_computer_ou1," + self.base_dn)
 363
 364         self.sd_utils.dacl_add_ace("OU=test_computer_ou1," + self.base_dn, mod)
 365
 366         computername=self.computernames[0]
 367         self.add_computer_ldap(computername)
 368
 369         res = self.admin_samdb.search("%s" % self.base_dn,
 370                                       expression="(&(objectClass=computer)(samAccountName=%s$))" % computername,
 371                                       scope=SCOPE_SUBTREE,
 372                                       attrs=[])
 373
 374         m = ldb.Message()
 375         m.dn = res[0].dn
 376         m["description"]= ldb.MessageElement(
 377             ("A description"), ldb.FLAG_MOD_REPLACE,
 378             "description")
 379         self.samdb.modify(m)
 380
 381         # These bits are privileged, but authenticated users have that CAR by default, so this is a pain to test
 382         priv_to_auth_users_bits = set([UF_PASSWD_NOTREQD, UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED,
 383                                        UF_DONT_EXPIRE_PASSWD])
 384
 385         # These bits really are privileged
 386         priv_bits = set([UF_INTERDOMAIN_TRUST_ACCOUNT, UF_SERVER_TRUST_ACCOUNT,
 387                          UF_TRUSTED_FOR_DELEGATION, UF_TRUSTED_TO_AUTHENTICATE_FOR_DELEGATION])
 388
 389         invalid_bits = set([UF_TEMP_DUPLICATE_ACCOUNT, UF_PARTIAL_SECRETS_ACCOUNT])
 390
 391         for bit in bits:
 392             m = ldb.Message()
 393             m.dn = res[0].dn
 394             m["userAccountControl"] = ldb.MessageElement(str(bit|UF_PASSWD_NOTREQD),
 395                                                          ldb.FLAG_MOD_REPLACE, "userAccountControl")
 396             try:
 397                 self.samdb.modify(m)
 398                 if (bit in priv_bits):
 399                     self.fail("Unexpectedly able to set userAccountControl bit 0x%08X on %s" % (bit, m.dn))
 400             except LdbError, (enum, estr):
 401                 if bit in invalid_bits:
 402                     self.assertEqual(enum, ldb.ERR_OTHER, "was not able to set 0x%08X on %s" % (bit, m.dn))
 403                     # No point going on, try the next bit
 404                     continue
 405                 elif (bit in priv_bits):
 406                     self.assertEqual(ldb.ERR_INSUFFICIENT_ACCESS_RIGHTS, enum)
 407                 else:
 408                     self.fail("Unable to set userAccountControl bit 0x%08X on %s: %s" % (bit, m.dn, estr))
 409
 410
 411     def uac_bits_unrelated_modify_helper(self, account_type):
 412         user_sid = self.sd_utils.get_object_sid(self.unpriv_user_dn)
 413         mod = "(OA;;CC;bf967a86-0de6-11d0-a285-00aa003049e2;;%s)" % str(user_sid)
 414
 415         old_sd = self.sd_utils.read_sd_on_dn("OU=test_computer_ou1," + self.base_dn)
 416
 417         self.sd_utils.dacl_add_ace("OU=test_computer_ou1," + self.base_dn, mod)
 418
 419         computername=self.computernames[0]
 420         self.add_computer_ldap(computername, others={"userAccountControl": [str(account_type)]})
 421
 422         res = self.admin_samdb.search("%s" % self.base_dn,
 423                                       expression="(&(objectClass=computer)(samAccountName=%s$))" % computername,
 424                                       scope=SCOPE_SUBTREE,
 425                                       attrs=["userAccountControl"])
 426         self.assertEqual(int(res[0]["userAccountControl"][0]), account_type)
 427
 428         m = ldb.Message()
 429         m.dn = res[0].dn
 430         m["description"]= ldb.MessageElement(
 431             ("A description"), ldb.FLAG_MOD_REPLACE,
 432             "description")
 433         self.samdb.modify(m)
 434
 435         invalid_bits = set([UF_TEMP_DUPLICATE_ACCOUNT, UF_PARTIAL_SECRETS_ACCOUNT])
 436
 437         # UF_LOCKOUT isn't actually ignored, it changes other
 438         # attributes but does not stick here.  See MS-SAMR 2.2.1.13
 439         # UF_FLAG Codes clarification that UF_SCRIPT and
 440         # UF_PASSWD_CANT_CHANGE are simply ignored by both clients and
 441         # servers.  Other bits are ignored as they are undefined, or
 442         # are not set into the attribute (instead triggering other
 443         # events).
 444         ignored_bits = set([UF_SCRIPT, UF_00000004, UF_LOCKOUT, UF_PASSWD_CANT_CHANGE,
 445                             UF_00000400, UF_00004000, UF_00008000, UF_PASSWORD_EXPIRED,
 446                             int("0x10000000", 16), int("0x20000000", 16), int("0x40000000", 16), int("0x80000000", 16)])
 447         super_priv_bits = set([UF_INTERDOMAIN_TRUST_ACCOUNT])
 448
 449         priv_to_remove_bits = set([UF_TRUSTED_FOR_DELEGATION, UF_TRUSTED_TO_AUTHENTICATE_FOR_DELEGATION])
 450
 451         for bit in bits:
 452             # Reset this to the initial position, just to be sure
 453             m = ldb.Message()
 454             m.dn = res[0].dn
 455             m["userAccountControl"] = ldb.MessageElement(str(account_type),
 456                                                          ldb.FLAG_MOD_REPLACE, "userAccountControl")
 457             self.admin_samdb.modify(m)
 458
 459             res = self.admin_samdb.search("%s" % self.base_dn,
 460                                           expression="(&(objectClass=computer)(samAccountName=%s$))" % computername,
 461                                           scope=SCOPE_SUBTREE,
 462                                           attrs=["userAccountControl"])
 463
 464             self.assertEqual(int(res[0]["userAccountControl"][0]), account_type)
 465
 466             m = ldb.Message()
 467             m.dn = res[0].dn
 468             m["userAccountControl"] = ldb.MessageElement(str(bit|UF_PASSWD_NOTREQD),
 469                                                          ldb.FLAG_MOD_REPLACE, "userAccountControl")
 470             try:
 471                 self.admin_samdb.modify(m)
 472                 if bit in invalid_bits:
 473                     self.fail("Should have been unable to set userAccountControl bit 0x%08X on %s" % (bit, m.dn))
 474
 475             except LdbError, (enum, estr):
 476                 if bit in invalid_bits:
 477                     self.assertEqual(enum, ldb.ERR_OTHER)
 478                     # No point going on, try the next bit
 479                     continue
 480                 elif bit in super_priv_bits:
 481                     self.assertEqual(enum, ldb.ERR_INSUFFICIENT_ACCESS_RIGHTS)
 482                     # No point going on, try the next bit
 483                     continue
 484                 else:
 485                     self.fail("Unable to set userAccountControl bit 0x%08X on %s: %s" % (bit, m.dn, estr))
 486
 487             res = self.admin_samdb.search("%s" % self.base_dn,
 488                                           expression="(&(objectClass=computer)(samAccountName=%s$))" % computername,
 489                                           scope=SCOPE_SUBTREE,
 490                                           attrs=["userAccountControl"])
 491
 492             if bit in ignored_bits:
 493                 self.assertEqual(int(res[0]["userAccountControl"][0]), UF_NORMAL_ACCOUNT|UF_PASSWD_NOTREQD, "Bit 0x%08x shouldn't stick" % bit)
 494             else:
 495                 if bit in account_types:
 496                     self.assertEqual(int(res[0]["userAccountControl"][0]), bit|UF_PASSWD_NOTREQD, "Bit 0x%08x didn't stick" % bit)
 497                 else:
 498                     self.assertEqual(int(res[0]["userAccountControl"][0]), bit|UF_NORMAL_ACCOUNT|UF_PASSWD_NOTREQD, "Bit 0x%08x didn't stick" % bit)
 499
 500             try:
 501                 m = ldb.Message()
 502                 m.dn = res[0].dn
 503                 m["userAccountControl"] = ldb.MessageElement(str(bit|UF_PASSWD_NOTREQD|UF_ACCOUNTDISABLE),
 504                                                              ldb.FLAG_MOD_REPLACE, "userAccountControl")
 505                 self.samdb.modify(m)
 506
 507             except LdbError, (enum, estr):
 508                 self.fail("Unable to set userAccountControl bit 0x%08X on %s: %s" % (bit, m.dn, estr))
 509
 510             try:
 511                 m = ldb.Message()
 512                 m.dn = res[0].dn
 513                 m["userAccountControl"] = ldb.MessageElement(str(UF_PASSWD_NOTREQD|UF_ACCOUNTDISABLE),
 514                                                              ldb.FLAG_MOD_REPLACE, "userAccountControl")
 515                 self.samdb.modify(m)
 516                 if bit in priv_to_remove_bits:
 517                     self.fail("Should have been unable to remove userAccountControl bit 0x%08X on %s" % (bit, m.dn))
 518
 519             except LdbError, (enum, estr):
 520                 if bit in priv_to_remove_bits:
 521                     self.assertEqual(enum, ldb.ERR_INSUFFICIENT_ACCESS_RIGHTS)
 522                 else:
 523                     self.fail("Unexpectedly able to remove userAccountControl bit 0x%08X on %s: %s" % (bit, m.dn, estr))
 524
 525             res = self.admin_samdb.search("%s" % self.base_dn,
 526                                           expression="(&(objectClass=computer)(samAccountName=%s$))" % computername,
 527                                           scope=SCOPE_SUBTREE,
 528                                           attrs=["userAccountControl"])
 529
 530             if bit in priv_to_remove_bits:
 531                 self.assertEqual(int(res[0]["userAccountControl"][0]),
 532                                  bit|UF_NORMAL_ACCOUNT|UF_ACCOUNTDISABLE|UF_PASSWD_NOTREQD,
 533                                  "bit 0X%08x should not have been removed" % bit)
 534             else:
 535                 self.assertEqual(int(res[0]["userAccountControl"][0]),
 536                                  UF_NORMAL_ACCOUNT|UF_ACCOUNTDISABLE|UF_PASSWD_NOTREQD,
 537                                  "bit 0X%08x should have been removed" % bit)
 538
 539     def test_uac_bits_unrelated_modify_normal(self):
 540         self.uac_bits_unrelated_modify_helper(UF_NORMAL_ACCOUNT)
 541
 542     def test_uac_bits_unrelated_modify_workstation(self):
 543         self.uac_bits_unrelated_modify_helper(UF_WORKSTATION_TRUST_ACCOUNT)
 544
 545     def test_uac_bits_add(self):
 546         computername=self.computernames[0]
 547
 548         user_sid = self.sd_utils.get_object_sid(self.unpriv_user_dn)
 549         mod = "(OA;;CC;bf967a86-0de6-11d0-a285-00aa003049e2;;%s)" % str(user_sid)
 550
 551         old_sd = self.sd_utils.read_sd_on_dn("OU=test_computer_ou1," + self.base_dn)
 552
 553         self.sd_utils.dacl_add_ace("OU=test_computer_ou1," + self.base_dn, mod)
 554
 555         invalid_bits = set([UF_TEMP_DUPLICATE_ACCOUNT, UF_PARTIAL_SECRETS_ACCOUNT])
 556
 557         # These bits are privileged, but authenticated users have that CAR by default, so this is a pain to test
 558         priv_to_auth_users_bits = set([UF_PASSWD_NOTREQD, UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED,
 559                                        UF_DONT_EXPIRE_PASSWD])
 560
 561         # These bits really are privileged
 562         priv_bits = set([UF_INTERDOMAIN_TRUST_ACCOUNT, UF_SERVER_TRUST_ACCOUNT,
 563                          UF_TRUSTED_FOR_DELEGATION, UF_TRUSTED_TO_AUTHENTICATE_FOR_DELEGATION])
 564
 565         for bit in bits:
 566             try:
 567                 self.add_computer_ldap(computername, others={"userAccountControl": [str(bit)]})
 568                 delete_force(self.admin_samdb, "CN=%s,OU=test_computer_ou1,%s" % (computername, self.base_dn))
 569                 if bit in priv_bits:
 570                     self.fail("Unexpectdly able to set userAccountControl bit 0x%08X on %s" % (bit, computername))
 571
 572             except LdbError, (enum, estr):
 573                 if bit in invalid_bits:
 574                     self.assertEqual(enum, ldb.ERR_OTHER, "Invalid bit 0x%08X was able to be set on %s" % (bit, computername))
 575                     # No point going on, try the next bit
 576                     continue
 577                 elif bit in priv_bits:
 578                     self.assertEqual(enum, ldb.ERR_INSUFFICIENT_ACCESS_RIGHTS)
 579                     continue
 580                 else:
 581                     self.fail("Unable to set userAccountControl bit 0x%08X on %s: %s" % (bit, computername, estr))
 582
 583     def test_primarygroupID_cc_add(self):
 584         computername=self.computernames[0]
 585
 586         user_sid = self.sd_utils.get_object_sid(self.unpriv_user_dn)
 587         mod = "(OA;;CC;bf967a86-0de6-11d0-a285-00aa003049e2;;%s)" % str(user_sid)
 588
 589         old_sd = self.sd_utils.read_sd_on_dn("OU=test_computer_ou1," + self.base_dn)
 590
 591         self.sd_utils.dacl_add_ace("OU=test_computer_ou1," + self.base_dn, mod)
 592         try:
 593             # When creating a new object, you can not ever set the primaryGroupID
 594             self.add_computer_ldap(computername, others={"primaryGroupID": [str(security.DOMAIN_RID_ADMINS)]})
 595             self.fail("Unexpectedly able to set primaryGruopID to be an admin on %s" % computername)
 596         except LdbError, (enum, estr):
 597             self.assertEqual(enum, ldb.ERR_UNWILLING_TO_PERFORM)
 598
 599
 600     def test_primarygroupID_priv_DC_modify(self):
 601         computername=self.computernames[0]
 602
 603         self.add_computer_ldap(computername,
 604                                others={"userAccountControl": [str(UF_SERVER_TRUST_ACCOUNT)]},
 605                                samdb=self.admin_samdb)
 606         res = self.admin_samdb.search("%s" % self.base_dn,
 607                                       expression="(&(objectClass=computer)(samAccountName=%s$))" % computername,
 608                                       scope=SCOPE_SUBTREE,
 609                                       attrs=[""])
 610
 611
 612         m = ldb.Message()
 613         m.dn = ldb.Dn(self.admin_samdb, "<SID=%s-%d>" % (str(self.domain_sid),
 614                                                          security.DOMAIN_RID_USERS))
 615         m["member"]= ldb.MessageElement(
 616             [str(res[0].dn)], ldb.FLAG_MOD_ADD,
 617             "member")
 618         self.admin_samdb.modify(m)
 619
 620         m = ldb.Message()
 621         m.dn = res[0].dn
 622         m["primaryGroupID"]= ldb.MessageElement(
 623             [str(security.DOMAIN_RID_USERS)], ldb.FLAG_MOD_REPLACE,
 624             "primaryGroupID")
 625         try:
 626             self.admin_samdb.modify(m)
 627
 628             # When creating a new object, you can not ever set the primaryGroupID
 629             self.fail("Unexpectedly able to set primaryGroupID to be other than DCS on %s" % computername)
 630         except LdbError, (enum, estr):
 631             self.assertEqual(enum, ldb.ERR_UNWILLING_TO_PERFORM)
 632
 633     def test_primarygroupID_priv_member_modify(self):
 634         computername=self.computernames[0]
 635
 636         self.add_computer_ldap(computername,
 637                                others={"userAccountControl": [str(UF_WORKSTATION_TRUST_ACCOUNT|UF_PARTIAL_SECRETS_ACCOUNT)]},
 638                                samdb=self.admin_samdb)
 639         res = self.admin_samdb.search("%s" % self.base_dn,
 640                                       expression="(&(objectClass=computer)(samAccountName=%s$))" % computername,
 641                                       scope=SCOPE_SUBTREE,
 642                                       attrs=[""])
 643
 644
 645         m = ldb.Message()
 646         m.dn = ldb.Dn(self.admin_samdb, "<SID=%s-%d>" % (str(self.domain_sid),
 647                                                          security.DOMAIN_RID_USERS))
 648         m["member"]= ldb.MessageElement(
 649             [str(res[0].dn)], ldb.FLAG_MOD_ADD,
 650             "member")
 651         self.admin_samdb.modify(m)
 652
 653         m = ldb.Message()
 654         m.dn = res[0].dn
 655         m["primaryGroupID"]= ldb.MessageElement(
 656             [str(security.DOMAIN_RID_USERS)], ldb.FLAG_MOD_REPLACE,
 657             "primaryGroupID")
 658         try:
 659             self.admin_samdb.modify(m)
 660
 661             # When creating a new object, you can not ever set the primaryGroupID
 662             self.fail("Unexpectedly able to set primaryGroupID to be other than DCS on %s" % computername)
 663         except LdbError, (enum, estr):
 664             self.assertEqual(enum, ldb.ERR_UNWILLING_TO_PERFORM)
 665
 666
 667     def test_primarygroupID_priv_user_modify(self):
 668         computername=self.computernames[0]
 669
 670         self.add_computer_ldap(computername,
 671                                others={"userAccountControl": [str(UF_WORKSTATION_TRUST_ACCOUNT)]},
 672                                samdb=self.admin_samdb)
 673         res = self.admin_samdb.search("%s" % self.base_dn,
 674                                       expression="(&(objectClass=computer)(samAccountName=%s$))" % computername,
 675                                       scope=SCOPE_SUBTREE,
 676                                       attrs=[""])
 677
 678
 679         m = ldb.Message()
 680         m.dn = ldb.Dn(self.admin_samdb, "<SID=%s-%d>" % (str(self.domain_sid),
 681                                                          security.DOMAIN_RID_ADMINS))
 682         m["member"]= ldb.MessageElement(
 683             [str(res[0].dn)], ldb.FLAG_MOD_ADD,
 684             "member")
 685         self.admin_samdb.modify(m)
 686
 687         m = ldb.Message()
 688         m.dn = res[0].dn
 689         m["primaryGroupID"]= ldb.MessageElement(
 690             [str(security.DOMAIN_RID_ADMINS)], ldb.FLAG_MOD_REPLACE,
 691             "primaryGroupID")
 692         self.admin_samdb.modify(m)
 693
 694
 695 runner = SubunitTestRunner()
 696 rc = 0
 697 if not runner.run(unittest.makeSuite(UserAccountControlTests)).wasSuccessful():
 698     rc = 1
 699 sys.exit(rc)