JezK
Edit File: auth_log_netlogon_bad_creds.py
# Unix SMB/CIFS implementation. # Copyright (C) Andrew Bartlett <abartlet@samba.org> 2017 # Copyright (C) Catalyst IT Ltd. 2017 # # 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/>. # """ Tests that exercise auth logging for unsuccessful netlogon attempts. NOTE: netlogon is only done once per session, so this file should only test failed logons. Adding a successful case will potentially break the other tests, depending on the order of execution. """ import samba.tests import os from samba import NTSTATUSError from samba.samdb import SamDB import samba.tests.auth_log_base from samba.credentials import Credentials from samba.dcerpc import netlogon from samba.dcerpc.dcerpc import AS_SYSTEM_MAGIC_PATH_TOKEN from samba.auth import system_session from samba.tests import delete_force from samba.dsdb import UF_WORKSTATION_TRUST_ACCOUNT, UF_PASSWD_NOTREQD from samba.dcerpc.misc import SEC_CHAN_WKSTA from samba.dcerpc.netlogon import NETLOGON_NEG_STRONG_KEYS from samba.common import get_string from samba.dcerpc.windows_event_ids import ( EVT_ID_UNSUCCESSFUL_LOGON, EVT_LOGON_NETWORK ) class AuthLogTestsNetLogonBadCreds(samba.tests.auth_log_base.AuthLogTestBase): def setUp(self): super(AuthLogTestsNetLogonBadCreds, self).setUp() self.lp = samba.tests.env_loadparm() self.session = system_session() self.ldb = SamDB( session_info=self.session, lp=self.lp) self.domain = os.environ["DOMAIN"] self.netbios_name = "NetLogonBad" self.machinepass = "abcdefghij" self.remoteAddress = AS_SYSTEM_MAGIC_PATH_TOKEN self.base_dn = self.ldb.domain_dn() self.dn = ("cn=%s,cn=users,%s" % (self.netbios_name, self.base_dn)) utf16pw = get_string('"' + self.machinepass + '"').encode('utf-16-le') self.ldb.add({ "dn": self.dn, "objectclass": "computer", "sAMAccountName": "%s$" % self.netbios_name, "userAccountControl": str(UF_WORKSTATION_TRUST_ACCOUNT | UF_PASSWD_NOTREQD), "unicodePwd": utf16pw}) def tearDown(self): super(AuthLogTestsNetLogonBadCreds, self).tearDown() delete_force(self.ldb, self.dn) def _test_netlogon(self, name, pwd, status, checkFunction, event_id): def isLastExpectedMessage(msg): return ( msg["type"] == "Authentication" and msg["Authentication"]["serviceDescription"] == "NETLOGON" and msg["Authentication"]["authDescription"] == "ServerAuthenticate" and msg["Authentication"]["status"] == status and msg["Authentication"]["eventId"] == event_id and msg["Authentication"]["logonType"] == EVT_LOGON_NETWORK) machine_creds = Credentials() machine_creds.guess(self.get_loadparm()) machine_creds.set_secure_channel_type(SEC_CHAN_WKSTA) machine_creds.set_password(pwd) machine_creds.set_username(name + "$") try: netlogon.netlogon("ncalrpc:[schannel]", self.get_loadparm(), machine_creds) self.fail("NTSTATUSError not raised") except NTSTATUSError: pass messages = self.waitForMessages(isLastExpectedMessage) checkFunction(messages) def netlogon_check(self, messages): expected_messages = 4 self.assertEqual(expected_messages, len(messages), "Did not receive the expected number of messages") # Check the first message it should be an Authorization msg = messages[0] self.assertEqual("Authorization", msg["type"]) self.assertEqual("DCE/RPC", msg["Authorization"]["serviceDescription"]) self.assertEqual("ncalrpc", msg["Authorization"]["authType"]) self.assertEqual("NONE", msg["Authorization"]["transportProtection"]) self.assertTrue(self.is_guid(msg["Authorization"]["sessionId"])) def test_netlogon_bad_machine_name(self): self._test_netlogon("bad_name", self.machinepass, "NT_STATUS_NO_TRUST_SAM_ACCOUNT", self.netlogon_check, EVT_ID_UNSUCCESSFUL_LOGON) def test_netlogon_bad_password(self): self._test_netlogon(self.netbios_name, "badpass", "NT_STATUS_ACCESS_DENIED", self.netlogon_check, EVT_ID_UNSUCCESSFUL_LOGON) def test_netlogon_password_DES(self): """Logon failure that exercises the "DES" passwordType path. """ def isLastExpectedMessage(msg): return ( msg["type"] == "Authentication" and msg["Authentication"]["serviceDescription"] == "NETLOGON" and msg["Authentication"]["authDescription"] == "ServerAuthenticate" and msg["Authentication"]["passwordType"] == "DES" and (msg["Authentication"]["eventId"] == EVT_ID_UNSUCCESSFUL_LOGON) and msg["Authentication"]["logonType"] == EVT_LOGON_NETWORK) c = netlogon.netlogon("ncalrpc:[schannel]", self.get_loadparm()) creds = netlogon.netr_Credential() c.netr_ServerReqChallenge(self.server, self.netbios_name, creds) try: c.netr_ServerAuthenticate3(self.server, self.netbios_name, SEC_CHAN_WKSTA, self.netbios_name, creds, 0) except NTSTATUSError: pass self.waitForMessages(isLastExpectedMessage) def test_netlogon_password_HMAC_MD5(self): """Logon failure that exercises the "HMAC-MD5" passwordType path. """ def isLastExpectedMessage(msg): return ( msg["type"] == "Authentication" and msg["Authentication"]["serviceDescription"] == "NETLOGON" and msg["Authentication"]["authDescription"] == "ServerAuthenticate" and msg["Authentication"]["passwordType"] == "HMAC-MD5" and (msg["Authentication"]["eventId"] == EVT_ID_UNSUCCESSFUL_LOGON) and msg["Authentication"]["logonType"] == EVT_LOGON_NETWORK) c = netlogon.netlogon("ncalrpc:[schannel]", self.get_loadparm()) creds = netlogon.netr_Credential() c.netr_ServerReqChallenge(self.server, self.netbios_name, creds) try: c.netr_ServerAuthenticate3(self.server, self.netbios_name, SEC_CHAN_WKSTA, self.netbios_name, creds, NETLOGON_NEG_STRONG_KEYS) except NTSTATUSError: pass self.waitForMessages(isLastExpectedMessage)