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# Tests for SamDb password change audit logging.
# Copyright (C) Andrew Bartlett <abartlet@samba.org> 2018
#
# 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 for the SamDb logging of password changes.
"""
import samba.tests
from samba.dcerpc.messaging import MSG_DSDB_PWD_LOG, DSDB_PWD_EVENT_NAME
from samba.samdb import SamDB
from samba.auth import system_session
import os
from samba.tests.audit_log_base import AuditLogTestBase
from samba.tests import delete_force
from samba.net import Net
from ldb import ERR_INSUFFICIENT_ACCESS_RIGHTS
from samba.dcerpc.windows_event_ids import (
EVT_ID_PASSWORD_CHANGE,
EVT_ID_PASSWORD_RESET
)
USER_NAME = "auditlogtestuser"
USER_PASS = samba.generate_random_password(32, 32)
SECOND_USER_NAME = "auditlogtestuser02"
SECOND_USER_PASS = samba.generate_random_password(32, 32)
class AuditLogPassChangeTests(AuditLogTestBase):
def setUp(self):
self.message_type = MSG_DSDB_PWD_LOG
self.event_type = DSDB_PWD_EVENT_NAME
super(AuditLogPassChangeTests, self).setUp()
self.server_ip = os.environ["SERVER_IP"]
host = "ldap://%s" % os.environ["SERVER"]
self.ldb = SamDB(url=host,
session_info=system_session(),
credentials=self.get_credentials(),
lp=self.get_loadparm())
self.server = os.environ["SERVER"]
# Gets back the basedn
self.base_dn = self.ldb.domain_dn()
# Get the old "dSHeuristics" if it was set
dsheuristics = self.ldb.get_dsheuristics()
# Set the "dSHeuristics" to activate the correct "userPassword"
# behaviour
self.ldb.set_dsheuristics("000000001")
# Reset the "dSHeuristics" as they were before
self.addCleanup(self.ldb.set_dsheuristics, dsheuristics)
# Get the old "minPwdAge"
minPwdAge = self.ldb.get_minPwdAge()
# Set it temporarily to "0"
self.ldb.set_minPwdAge("0")
self.base_dn = self.ldb.domain_dn()
# Reset the "minPwdAge" as it was before
self.addCleanup(self.ldb.set_minPwdAge, minPwdAge)
# (Re)adds the test user USER_NAME with password USER_PASS
delete_force(self.ldb, "cn=" + USER_NAME + ",cn=users," + self.base_dn)
delete_force(
self.ldb,
"cn=" + SECOND_USER_NAME + ",cn=users," + self.base_dn)
self.ldb.add({
"dn": "cn=" + USER_NAME + ",cn=users," + self.base_dn,
"objectclass": "user",
"sAMAccountName": USER_NAME,
"userPassword": USER_PASS
})
#
# Discard the messages from the setup code
#
def discardSetupMessages(self, dn):
self.waitForMessages(1, dn=dn)
self.discardMessages()
def tearDown(self):
super(AuditLogPassChangeTests, self).tearDown()
def test_net_change_password(self):
dn = "CN=" + USER_NAME + ",CN=Users," + self.base_dn
self.discardSetupMessages(dn)
creds = self.insta_creds(template=self.get_credentials())
lp = self.get_loadparm()
net = Net(creds, lp, server=self.server)
password = "newPassword!!42"
net.change_password(newpassword=password,
username=USER_NAME,
oldpassword=USER_PASS)
messages = self.waitForMessages(1, net, dn)
print("Received %d messages" % len(messages))
self.assertEqual(1,
len(messages),
"Did not receive the expected number of messages")
audit = messages[0]["passwordChange"]
self.assertEqual(EVT_ID_PASSWORD_CHANGE, audit["eventId"])
self.assertEqual("Change", audit["action"])
self.assertEqual(dn, audit["dn"])
self.assertRegexpMatches(audit["remoteAddress"],
self.remoteAddress)
session_id = self.get_session()
self.assertEqual(session_id, audit["sessionId"])
service_description = self.get_service_description()
self.assertEqual(service_description, "DCE/RPC")
self.assertTrue(self.is_guid(audit["transactionId"]))
def test_net_set_password_user_without_permission(self):
dn = "CN=" + USER_NAME + ",CN=Users," + self.base_dn
self.discardSetupMessages(dn)
self.ldb.newuser(SECOND_USER_NAME, SECOND_USER_PASS)
#
# Get the password reset from the user add
#
dn = "CN=" + SECOND_USER_NAME + ",CN=Users," + self.base_dn
messages = self.waitForMessages(1, dn=dn)
print("Received %d messages" % len(messages))
self.assertEqual(1,
len(messages),
"Did not receive the expected number of messages")
audit = messages[0]["passwordChange"]
self.assertEqual(EVT_ID_PASSWORD_RESET, audit["eventId"])
self.assertEqual("Reset", audit["action"])
self.assertEqual(dn, audit["dn"])
self.assertRegexpMatches(audit["remoteAddress"],
self.remoteAddress)
session_id = self.get_session()
self.assertEqual(session_id, audit["sessionId"])
service_description = self.get_service_description()
self.assertEqual(service_description, "LDAP")
self.assertTrue(self.is_guid(audit["transactionId"]))
self.assertEqual(0, audit["statusCode"])
self.assertEqual("Success", audit["status"])
self.discardMessages()
creds = self.insta_creds(
template=self.get_credentials(),
username=SECOND_USER_NAME,
userpass=SECOND_USER_PASS,
kerberos_state=None)
lp = self.get_loadparm()
net = Net(creds, lp, server=self.server)
password = "newPassword!!42"
domain = lp.get("workgroup")
try:
net.set_password(newpassword=password,
account_name=USER_NAME,
domain_name=domain)
self.fail("Expected exception not thrown")
except Exception:
pass
dn = "CN=" + USER_NAME + ",CN=Users," + self.base_dn
messages = self.waitForMessages(1, net, dn=dn)
print("Received %d messages" % len(messages))
self.assertEqual(1,
len(messages),
"Did not receive the expected number of messages")
audit = messages[0]["passwordChange"]
self.assertEqual(EVT_ID_PASSWORD_RESET, audit["eventId"])
self.assertEqual("Reset", audit["action"])
self.assertEqual(dn, audit["dn"])
self.assertRegexpMatches(audit["remoteAddress"],
self.remoteAddress)
session_id = self.get_session()
self.assertEqual(session_id, audit["sessionId"])
service_description = self.get_service_description()
self.assertEqual(service_description, "DCE/RPC")
self.assertTrue(self.is_guid(audit["transactionId"]))
self.assertEqual(ERR_INSUFFICIENT_ACCESS_RIGHTS, audit["statusCode"])
self.assertEqual("insufficient access rights", audit["status"])
def test_net_set_password(self):
dn = "CN=" + USER_NAME + ",CN=Users," + self.base_dn
self.discardSetupMessages(dn)
creds = self.insta_creds(template=self.get_credentials())
lp = self.get_loadparm()
net = Net(creds, lp, server=self.server)
password = "newPassword!!42"
domain = lp.get("workgroup")
net.set_password(newpassword=password,
account_name=USER_NAME,
domain_name=domain)
dn = "CN=" + USER_NAME + ",CN=Users," + self.base_dn
messages = self.waitForMessages(1, net, dn)
print("Received %d messages" % len(messages))
self.assertEqual(1,
len(messages),
"Did not receive the expected number of messages")
audit = messages[0]["passwordChange"]
self.assertEqual(EVT_ID_PASSWORD_RESET, audit["eventId"])
self.assertEqual("Reset", audit["action"])
self.assertEqual(dn, audit["dn"])
self.assertRegexpMatches(audit["remoteAddress"],
self.remoteAddress)
session_id = self.get_session()
self.assertEqual(session_id, audit["sessionId"])
service_description = self.get_service_description()
self.assertEqual(service_description, "DCE/RPC")
session_id = self.get_session()
self.assertEqual(session_id, audit["sessionId"])
self.assertTrue(self.is_guid(audit["transactionId"]))
def test_ldap_change_password(self):
dn = "cn=" + USER_NAME + ",cn=users," + self.base_dn
self.discardSetupMessages(dn)
new_password = samba.generate_random_password(32, 32)
self.ldb.modify_ldif(
"dn: " + dn + "\n" +
"changetype: modify\n" +
"delete: userPassword\n" +
"userPassword: " + USER_PASS + "\n" +
"add: userPassword\n" +
"userPassword: " + new_password + "\n")
messages = self.waitForMessages(1, dn=dn)
print("Received %d messages" % len(messages))
self.assertEqual(1,
len(messages),
"Did not receive the expected number of messages")
audit = messages[0]["passwordChange"]
self.assertEqual(EVT_ID_PASSWORD_CHANGE, audit["eventId"])
self.assertEqual("Change", audit["action"])
self.assertEqual(dn, audit["dn"])
self.assertRegexpMatches(audit["remoteAddress"],
self.remoteAddress)
self.assertTrue(self.is_guid(audit["sessionId"]))
session_id = self.get_session()
self.assertEqual(session_id, audit["sessionId"])
service_description = self.get_service_description()
self.assertEqual(service_description, "LDAP")
self.assertTrue(self.is_guid(audit["transactionId"]))
def test_ldap_replace_password(self):
dn = "cn=" + USER_NAME + ",cn=users," + self.base_dn
self.discardSetupMessages(dn)
new_password = samba.generate_random_password(32, 32)
self.ldb.modify_ldif(
"dn: " + dn + "\n" +
"changetype: modify\n" +
"replace: userPassword\n" +
"userPassword: " + new_password + "\n")
messages = self.waitForMessages(1, dn=dn)
print("Received %d messages" % len(messages))
self.assertEqual(1,
len(messages),
"Did not receive the expected number of messages")
audit = messages[0]["passwordChange"]
self.assertEqual(EVT_ID_PASSWORD_RESET, audit["eventId"])
self.assertEqual("Reset", audit["action"])
self.assertEqual(dn, audit["dn"])
self.assertRegexpMatches(audit["remoteAddress"],
self.remoteAddress)
self.assertTrue(self.is_guid(audit["sessionId"]))
session_id = self.get_session()
self.assertEqual(session_id, audit["sessionId"])
service_description = self.get_service_description()
self.assertEqual(service_description, "LDAP")
self.assertTrue(self.is_guid(audit["transactionId"]))
def test_ldap_add_user(self):
# The setup code adds a user, so we check for the password event
# generated by it.
dn = "cn=" + USER_NAME + ",cn=users," + self.base_dn
messages = self.waitForMessages(1, dn=dn)
print("Received %d messages" % len(messages))
self.assertEqual(1,
len(messages),
"Did not receive the expected number of messages")
#
# The first message should be the reset from the Setup code.
#
audit = messages[0]["passwordChange"]
self.assertEqual(EVT_ID_PASSWORD_RESET, audit["eventId"])
self.assertEqual("Reset", audit["action"])
self.assertEqual(dn, audit["dn"])
self.assertRegexpMatches(audit["remoteAddress"],
self.remoteAddress)
session_id = self.get_session()
self.assertEqual(session_id, audit["sessionId"])
service_description = self.get_service_description()
self.assertEqual(service_description, "LDAP")
self.assertTrue(self.is_guid(audit["sessionId"]))
self.assertTrue(self.is_guid(audit["transactionId"]))
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