python/samba/tests/auth_log_netlogon.py

   1 # Unix SMB/CIFS implementation.
   2 # Copyright (C) Andrew Bartlett <abartlet@samba.org> 2017
   3 # Copyright (C) Catalyst IT Ltd. 2017
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 #
  18
  19 """
  20     Tests that exercise the auth logging for a successful netlogon attempt
  21
  22     NOTE: As the netlogon authentication is performed once per session,
  23           there is only one test in this routine.  If another test is added
  24           only the test executed first will generate the netlogon auth message
  25 """
  26
  27 import samba.tests
  28 import os
  29 from samba.samdb import SamDB
  30 import samba.tests.auth_log_base
  31 from samba.credentials import Credentials
  32 from samba.dcerpc import netlogon
  33 from samba.dcerpc.dcerpc import AS_SYSTEM_MAGIC_PATH_TOKEN
  34 from samba.auth import system_session
  35 from samba.tests import delete_force
  36 from samba.dsdb import UF_WORKSTATION_TRUST_ACCOUNT, UF_PASSWD_NOTREQD
  37 from samba.dcerpc.misc import SEC_CHAN_WKSTA
  38 from samba.compat import text_type
  39 from samba.dcerpc.windows_event_ids import (
  40     EVT_ID_SUCCESSFUL_LOGON,
  41     EVT_LOGON_NETWORK
  42 )
  43
  44
  45 class AuthLogTestsNetLogon(samba.tests.auth_log_base.AuthLogTestBase):
  46
  47     def setUp(self):
  48         super(AuthLogTestsNetLogon, self).setUp()
  49         self.lp = samba.tests.env_loadparm()
  50         self.session = system_session()
  51         self.ldb = SamDB(
  52             session_info=self.session,
  53             lp=self.lp)
  54
  55         self.domain = os.environ["DOMAIN"]
  56         self.netbios_name = "NetLogonGood"
  57         self.machinepass = "abcdefghij"
  58         self.remoteAddress = AS_SYSTEM_MAGIC_PATH_TOKEN
  59         self.base_dn = self.ldb.domain_dn()
  60         self.dn = ("cn=%s,cn=users,%s" % (self.netbios_name, self.base_dn))
  61
  62         utf16pw = text_type('"' + self.machinepass + '"').encode('utf-16-le')
  63         self.ldb.add({
  64             "dn": self.dn,
  65             "objectclass": "computer",
  66             "sAMAccountName": "%s$" % self.netbios_name,
  67             "userAccountControl":
  68                 str(UF_WORKSTATION_TRUST_ACCOUNT | UF_PASSWD_NOTREQD),
  69             "unicodePwd": utf16pw})
  70
  71     def tearDown(self):
  72         super(AuthLogTestsNetLogon, self).tearDown()
  73         delete_force(self.ldb, self.dn)
  74
  75     def _test_netlogon(self, binding, checkFunction):
  76
  77         def isLastExpectedMessage(msg):
  78             return (
  79                 msg["type"] == "Authorization" and
  80                 msg["Authorization"]["serviceDescription"] == "DCE/RPC" and
  81                 msg["Authorization"]["authType"] == "schannel" and
  82                 msg["Authorization"]["transportProtection"] == "SEAL")
  83
  84         if binding:
  85             binding = "[schannel,%s]" % binding
  86         else:
  87             binding = "[schannel]"
  88
  89         machine_creds = Credentials()
  90         machine_creds.guess(self.get_loadparm())
  91         machine_creds.set_secure_channel_type(SEC_CHAN_WKSTA)
  92         machine_creds.set_password(self.machinepass)
  93         machine_creds.set_username(self.netbios_name + "$")
  94
  95         netlogon_conn = netlogon.netlogon("ncalrpc:%s" % binding,
  96                                           self.get_loadparm(),
  97                                           machine_creds)
  98
  99         messages = self.waitForMessages(isLastExpectedMessage, netlogon_conn)
 100         checkFunction(messages)
 101
 102     def netlogon_check(self, messages):
 103
 104         expected_messages = 5
 105         self.assertEquals(expected_messages,
 106                           len(messages),
 107                           "Did not receive the expected number of messages")
 108
 109         # Check the first message it should be an Authorization
 110         msg = messages[0]
 111         self.assertEquals("Authorization", msg["type"])
 112         self.assertEquals("DCE/RPC",
 113                           msg["Authorization"]["serviceDescription"])
 114         self.assertEquals("ncalrpc", msg["Authorization"]["authType"])
 115         self.assertEquals("NONE", msg["Authorization"]["transportProtection"])
 116         self.assertTrue(self.is_guid(msg["Authorization"]["sessionId"]))
 117
 118         # Check the fourth message it should be a NETLOGON Authentication
 119         msg = messages[3]
 120         self.assertEquals("Authentication", msg["type"])
 121         self.assertEquals("NETLOGON",
 122                           msg["Authentication"]["serviceDescription"])
 123         self.assertEquals("ServerAuthenticate",
 124                           msg["Authentication"]["authDescription"])
 125         self.assertEquals("NT_STATUS_OK",
 126                           msg["Authentication"]["status"])
 127         self.assertEquals("HMAC-SHA256",
 128                           msg["Authentication"]["passwordType"])
 129         self.assertEquals(EVT_ID_SUCCESSFUL_LOGON,
 130                           msg["Authentication"]["eventId"])
 131         self.assertEquals(EVT_LOGON_NETWORK,
 132                           msg["Authentication"]["logonType"])
 133
 134     def test_netlogon(self):
 135         self._test_netlogon("SEAL", self.netlogon_check)