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# 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().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$" % self.netbios_name,
"userAccountControl":
str(UF_WORKSTATION_TRUST_ACCOUNT | UF_PASSWD_NOTREQD),
"unicodePwd": utf16pw})
def tearDown(self):
super().tearDown()
delete_force(self.ldb, self.dn)
def _test_netlogon(self, name, pwd, status, checkFunction, event_id):
def isLastExpectedMessage(msg):
return (
msg["type"] == "Authentication" and
msg["Authentication"]["serviceDescription"] == "NETLOGON" and
msg["Authentication"]["authDescription"] ==
"ServerAuthenticate" and
msg["Authentication"]["status"] == status and
msg["Authentication"]["eventId"] == event_id and
msg["Authentication"]["logonType"] == EVT_LOGON_NETWORK)
machine_creds = Credentials()
machine_creds.guess(self.get_loadparm())
machine_creds.set_secure_channel_type(SEC_CHAN_WKSTA)
machine_creds.set_password(pwd)
machine_creds.set_username(name + "$")
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)
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