#!/usr/bin/env python # -*- coding: utf-8 -*- # This tests the password changes over LDAP for AD implementations # # Copyright Matthias Dieter Wallnoefer 2010 # # Notice: This tests will also work against Windows Server if the connection is # secured enough (SASL with a minimum of 128 Bit encryption) - consider # MS-ADTS 3.1.1.3.1.5 # # Important: Make sure that the minimum password age is set to "0"! import optparse import sys import time import base64 import os sys.path.append("bin/python") import samba.getopt as options from samba.auth import system_session from samba.credentials import Credentials from ldb import SCOPE_SUBTREE, SCOPE_ONELEVEL, SCOPE_BASE, LdbError from ldb import ERR_NO_SUCH_OBJECT, ERR_ATTRIBUTE_OR_VALUE_EXISTS from ldb import ERR_ENTRY_ALREADY_EXISTS, ERR_UNWILLING_TO_PERFORM from ldb import ERR_NOT_ALLOWED_ON_NON_LEAF, ERR_OTHER, ERR_INVALID_DN_SYNTAX from ldb import ERR_NO_SUCH_ATTRIBUTE from ldb import ERR_OBJECT_CLASS_VIOLATION, ERR_NOT_ALLOWED_ON_RDN from ldb import ERR_NAMING_VIOLATION, ERR_CONSTRAINT_VIOLATION from ldb import ERR_UNDEFINED_ATTRIBUTE_TYPE from ldb import Message, MessageElement, Dn from ldb import FLAG_MOD_ADD, FLAG_MOD_REPLACE, FLAG_MOD_DELETE from samba import gensec from samba.samdb import SamDB from subunit.run import SubunitTestRunner import unittest parser = optparse.OptionParser("passwords [options] ") sambaopts = options.SambaOptions(parser) parser.add_option_group(sambaopts) parser.add_option_group(options.VersionOptions(parser)) # use command line creds if available credopts = options.CredentialsOptions(parser) parser.add_option_group(credopts) opts, args = parser.parse_args() if len(args) < 1: parser.print_usage() sys.exit(1) host = args[0] lp = sambaopts.get_loadparm() creds = credopts.get_credentials(lp) # Force an encrypted connection creds.set_gensec_features(creds.get_gensec_features() | gensec.FEATURE_SEAL) # # Tests start here # class PasswordTests(unittest.TestCase): def delete_force(self, ldb, dn): try: ldb.delete(dn) except LdbError, (num, _): self.assertEquals(num, ERR_NO_SUCH_OBJECT) def find_basedn(self, ldb): res = ldb.search(base="", expression="", scope=SCOPE_BASE, attrs=["defaultNamingContext"]) self.assertEquals(len(res), 1) return res[0]["defaultNamingContext"][0] def setUp(self): self.ldb = ldb self.base_dn = self.find_basedn(ldb) # (Re)adds the test user "testuser" with the inital password # "thatsAcomplPASS1" self.delete_force(self.ldb, "cn=testuser,cn=users," + self.base_dn) self.ldb.add({ "dn": "cn=testuser,cn=users," + self.base_dn, "objectclass": ["user", "person"], "sAMAccountName": "testuser", "userPassword": "thatsAcomplPASS1" }) ldb.enable_account("(cn=testuser)" + self.base_dn) # Open a second LDB connection with the user credentials. Use the # command line credentials for informations like the domain, the realm # and the workstation. creds2 = Credentials() # FIXME: Reactivate the user credentials when we have user password # change support also on the ACL level in s4 creds2.set_username(creds.get_username()) creds2.set_password(creds.get_password()) #creds2.set_username("testuser") #creds2.set_password("thatsAcomplPASS1") creds2.set_domain(creds.get_domain()) creds2.set_realm(creds.get_realm()) creds2.set_workstation(creds.get_workstation()) creds2.set_gensec_features(creds2.get_gensec_features() | gensec.FEATURE_SEAL) self.ldb2 = SamDB(url=host, credentials=creds2, lp=lp) def test_unicodePwd_hash_set(self): print "Performs a password hash set operation on 'unicodePwd' which should be prevented" # Notice: Direct hash password sets should never work m = Message() m.dn = Dn(ldb, "cn=testuser,cn=users," + self.base_dn) m["unicodePwd"] = MessageElement("XXXXXXXXXXXXXXXX", FLAG_MOD_REPLACE, "unicodePwd") try: ldb.modify(m) self.fail() except LdbError, (num, _): self.assertEquals(num, ERR_UNWILLING_TO_PERFORM) def test_unicodePwd_hash_change(self): print "Performs a password hash change operation on 'unicodePwd' which should be prevented" # Notice: Direct hash password changes should never work # Hash password changes should never work try: self.ldb2.modify_ldif(""" dn: cn=testuser,cn=users,""" + self.base_dn + """ changetype: modify delete: unicodePwd unicodePwd: XXXXXXXXXXXXXXXX add: unicodePwd unicodePwd: YYYYYYYYYYYYYYYY """) self.fail() except LdbError, (num, _): self.assertEquals(num, ERR_CONSTRAINT_VIOLATION) def test_unicodePwd_clear_set(self): print "Performs a password cleartext set operation on 'unicodePwd'" m = Message() m.dn = Dn(ldb, "cn=testuser,cn=users," + self.base_dn) m["unicodePwd"] = MessageElement("\"thatsAcomplPASS2\"".encode('utf-16-le'), FLAG_MOD_REPLACE, "unicodePwd") ldb.modify(m) def test_unicodePwd_clear_change(self): print "Performs a password cleartext change operation on 'unicodePwd'" self.ldb2.modify_ldif(""" dn: cn=testuser,cn=users,""" + self.base_dn + """ changetype: modify delete: unicodePwd unicodePwd:: """ + base64.b64encode("\"thatsAcomplPASS1\"".encode('utf-16-le')) + """ add: unicodePwd unicodePwd:: """ + base64.b64encode("\"thatsAcomplPASS2\"".encode('utf-16-le')) + """ """) # A change to the same password again will not work (password history) try: self.ldb2.modify_ldif(""" dn: cn=testuser,cn=users,""" + self.base_dn + """ changetype: modify delete: unicodePwd unicodePwd:: """ + base64.b64encode("\"thatsAcomplPASS2\"".encode('utf-16-le')) + """ add: unicodePwd unicodePwd:: """ + base64.b64encode("\"thatsAcomplPASS2\"".encode('utf-16-le')) + """ """) self.fail() except LdbError, (num, _): self.assertEquals(num, ERR_CONSTRAINT_VIOLATION) def test_dBCSPwd_hash_set(self): print "Performs a password hash set operation on 'dBCSPwd' which should be prevented" # Notice: Direct hash password sets should never work m = Message() m.dn = Dn(ldb, "cn=testuser,cn=users," + self.base_dn) m["dBCSPwd"] = MessageElement("XXXXXXXXXXXXXXXX", FLAG_MOD_REPLACE, "dBCSPwd") try: ldb.modify(m) self.fail() except LdbError, (num, _): self.assertEquals(num, ERR_UNWILLING_TO_PERFORM) def test_dBCSPwd_hash_change(self): print "Performs a password hash change operation on 'dBCSPwd' which should be prevented" # Notice: Direct hash password changes should never work try: self.ldb2.modify_ldif(""" dn: cn=testuser,cn=users,""" + self.base_dn + """ changetype: modify delete: dBCSPwd dBCSPwd: XXXXXXXXXXXXXXXX add: dBCSPwd dBCSPwd: YYYYYYYYYYYYYYYY """) self.fail() except LdbError, (num, _): self.assertEquals(num, ERR_UNWILLING_TO_PERFORM) def test_userPassword_clear_set(self): print "Performs a password cleartext set operation on 'userPassword'" # Notice: This works only against Windows if "dSHeuristics" has been set # properly m = Message() m.dn = Dn(ldb, "cn=testuser,cn=users," + self.base_dn) m["userPassword"] = MessageElement("thatsAcomplPASS2", FLAG_MOD_REPLACE, "userPassword") ldb.modify(m) def test_userPassword_clear_change(self): print "Performs a password cleartext change operation on 'userPassword'" # Notice: This works only against Windows if "dSHeuristics" has been set # properly self.ldb2.modify_ldif(""" dn: cn=testuser,cn=users,""" + self.base_dn + """ changetype: modify delete: userPassword userPassword: thatsAcomplPASS1 add: userPassword userPassword: thatsAcomplPASS2 """) # A change to the same password again will not work (password history) try: self.ldb2.modify_ldif(""" dn: cn=testuser,cn=users,""" + self.base_dn + """ changetype: modify delete: userPassword userPassword: thatsAcomplPASS2 add: userPassword userPassword: thatsAcomplPASS2 """) self.fail() except LdbError, (num, _): self.assertEquals(num, ERR_CONSTRAINT_VIOLATION) def test_clearTextPassword_clear_set(self): print "Performs a password cleartext set operation on 'clearTextPassword'" # Notice: This never works against Windows - only supported by us try: m = Message() m.dn = Dn(ldb, "cn=testuser,cn=users," + self.base_dn) m["clearTextPassword"] = MessageElement("thatsAcomplPASS2".encode('utf-16-le'), FLAG_MOD_REPLACE, "clearTextPassword") ldb.modify(m) # this passes against s4 except LdbError, (num, msg): # "NO_SUCH_ATTRIBUTE" is returned by Windows -> ignore it if num != ERR_NO_SUCH_ATTRIBUTE: raise LdbError(num, msg) def test_clearTextPassword_clear_change(self): print "Performs a password cleartext change operation on 'clearTextPassword'" # Notice: This never works against Windows - only supported by us try: self.ldb2.modify_ldif(""" dn: cn=testuser,cn=users,""" + self.base_dn + """ changetype: modify delete: clearTextPassword clearTextPassword:: """ + base64.b64encode("thatsAcomplPASS1".encode('utf-16-le')) + """ add: clearTextPassword clearTextPassword:: """ + base64.b64encode("thatsAcomplPASS2".encode('utf-16-le')) + """ """) # this passes against s4 except LdbError, (num, msg): # "NO_SUCH_ATTRIBUTE" is returned by Windows -> ignore it if num != ERR_NO_SUCH_ATTRIBUTE: raise LdbError(num, msg) # A change to the same password again will not work (password history) try: self.ldb2.modify_ldif(""" dn: cn=testuser,cn=users,""" + self.base_dn + """ changetype: modify delete: clearTextPassword clearTextPassword:: """ + base64.b64encode("thatsAcomplPASS2".encode('utf-16-le')) + """ add: clearTextPassword clearTextPassword:: """ + base64.b64encode("thatsAcomplPASS2".encode('utf-16-le')) + """ """) self.fail() except LdbError, (num, _): # "NO_SUCH_ATTRIBUTE" is returned by Windows -> ignore it if num != ERR_NO_SUCH_ATTRIBUTE: self.assertEquals(num, ERR_CONSTRAINT_VIOLATION) def test_failures(self): print "Performs some failure testing" try: ldb.modify_ldif(""" dn: cn=testuser,cn=users,""" + self.base_dn + """ changetype: modify delete: userPassword userPassword: thatsAcomplPASS1 """) self.fail() except LdbError, (num, _): self.assertEquals(num, ERR_CONSTRAINT_VIOLATION) try: self.ldb2.modify_ldif(""" dn: cn=testuser,cn=users,""" + self.base_dn + """ changetype: modify delete: userPassword """) self.fail() except LdbError, (num, _): self.assertEquals(num, ERR_CONSTRAINT_VIOLATION) try: ldb.modify_ldif(""" dn: cn=testuser,cn=users,""" + self.base_dn + """ changetype: modify add: userPassword userPassword: thatsAcomplPASS1 """) self.fail() except LdbError, (num, _): self.assertEquals(num, ERR_UNWILLING_TO_PERFORM) try: self.ldb2.modify_ldif(""" dn: cn=testuser,cn=users,""" + self.base_dn + """ changetype: modify add: userPassword userPassword: thatsAcomplPASS1 """) self.fail() except LdbError, (num, _): self.assertEquals(num, ERR_UNWILLING_TO_PERFORM) try: ldb.modify_ldif(""" dn: cn=testuser,cn=users,""" + self.base_dn + """ changetype: modify delete: userPassword userPassword: thatsAcomplPASS1 add: userPassword userPassword: thatsAcomplPASS2 userPassword: thatsAcomplPASS2 """) self.fail() except LdbError, (num, _): self.assertEquals(num, ERR_CONSTRAINT_VIOLATION) try: self.ldb2.modify_ldif(""" dn: cn=testuser,cn=users,""" + self.base_dn + """ changetype: modify delete: userPassword userPassword: thatsAcomplPASS1 add: userPassword userPassword: thatsAcomplPASS2 userPassword: thatsAcomplPASS2 """) self.fail() except LdbError, (num, _): self.assertEquals(num, ERR_CONSTRAINT_VIOLATION) try: ldb.modify_ldif(""" dn: cn=testuser,cn=users,""" + self.base_dn + """ changetype: modify delete: userPassword userPassword: thatsAcomplPASS1 userPassword: thatsAcomplPASS1 add: userPassword userPassword: thatsAcomplPASS2 """) self.fail() except LdbError, (num, _): self.assertEquals(num, ERR_CONSTRAINT_VIOLATION) try: self.ldb2.modify_ldif(""" dn: cn=testuser,cn=users,""" + self.base_dn + """ changetype: modify delete: userPassword userPassword: thatsAcomplPASS1 userPassword: thatsAcomplPASS1 add: userPassword userPassword: thatsAcomplPASS2 """) self.fail() except LdbError, (num, _): self.assertEquals(num, ERR_CONSTRAINT_VIOLATION) try: ldb.modify_ldif(""" dn: cn=testuser,cn=users,""" + self.base_dn + """ changetype: modify delete: userPassword userPassword: thatsAcomplPASS1 add: userPassword userPassword: thatsAcomplPASS2 add: userPassword userPassword: thatsAcomplPASS2 """) self.fail() except LdbError, (num, _): self.assertEquals(num, ERR_UNWILLING_TO_PERFORM) try: self.ldb2.modify_ldif(""" dn: cn=testuser,cn=users,""" + self.base_dn + """ changetype: modify delete: userPassword userPassword: thatsAcomplPASS1 add: userPassword userPassword: thatsAcomplPASS2 add: userPassword userPassword: thatsAcomplPASS2 """) self.fail() except LdbError, (num, _): self.assertEquals(num, ERR_UNWILLING_TO_PERFORM) try: ldb.modify_ldif(""" dn: cn=testuser,cn=users,""" + self.base_dn + """ changetype: modify delete: userPassword userPassword: thatsAcomplPASS1 delete: userPassword userPassword: thatsAcomplPASS1 add: userPassword userPassword: thatsAcomplPASS2 """) self.fail() except LdbError, (num, _): self.assertEquals(num, ERR_UNWILLING_TO_PERFORM) try: self.ldb2.modify_ldif(""" dn: cn=testuser,cn=users,""" + self.base_dn + """ changetype: modify delete: userPassword userPassword: thatsAcomplPASS1 delete: userPassword userPassword: thatsAcomplPASS1 add: userPassword userPassword: thatsAcomplPASS2 """) self.fail() except LdbError, (num, _): self.assertEquals(num, ERR_UNWILLING_TO_PERFORM) try: ldb.modify_ldif(""" dn: cn=testuser,cn=users,""" + self.base_dn + """ changetype: modify delete: userPassword userPassword: thatsAcomplPASS1 add: userPassword userPassword: thatsAcomplPASS2 replace: userPassword userPassword: thatsAcomplPASS3 """) self.fail() except LdbError, (num, _): self.assertEquals(num, ERR_UNWILLING_TO_PERFORM) try: self.ldb2.modify_ldif(""" dn: cn=testuser,cn=users,""" + self.base_dn + """ changetype: modify delete: userPassword userPassword: thatsAcomplPASS1 add: userPassword userPassword: thatsAcomplPASS2 replace: userPassword userPassword: thatsAcomplPASS3 """) self.fail() except LdbError, (num, _): self.assertEquals(num, ERR_UNWILLING_TO_PERFORM) # Reverse order does work self.ldb2.modify_ldif(""" dn: cn=testuser,cn=users,""" + self.base_dn + """ changetype: modify add: userPassword userPassword: thatsAcomplPASS2 delete: userPassword userPassword: thatsAcomplPASS1 """) try: self.ldb2.modify_ldif(""" dn: cn=testuser,cn=users,""" + self.base_dn + """ changetype: modify delete: userPassword userPassword: thatsAcomplPASS2 add: unicodePwd unicodePwd:: """ + base64.b64encode("\"thatsAcomplPASS3\"".encode('utf-16-le')) + """ """) # this passes against s4 except LdbError, (num, _): self.assertEquals(num, ERR_ATTRIBUTE_OR_VALUE_EXISTS) try: self.ldb2.modify_ldif(""" dn: cn=testuser,cn=users,""" + self.base_dn + """ changetype: modify delete: unicodePwd unicodePwd:: """ + base64.b64encode("\"thatsAcomplPASS3\"".encode('utf-16-le')) + """ add: userPassword userPassword: thatsAcomplPASS4 """) # this passes against s4 except LdbError, (num, _): self.assertEquals(num, ERR_NO_SUCH_ATTRIBUTE) # Several password changes at once are allowed ldb.modify_ldif(""" dn: cn=testuser,cn=users,""" + self.base_dn + """ changetype: modify replace: userPassword userPassword: thatsAcomplPASS1 userPassword: thatsAcomplPASS2 """) # Several password changes at once are allowed ldb.modify_ldif(""" dn: cn=testuser,cn=users,""" + self.base_dn + """ changetype: modify replace: userPassword userPassword: thatsAcomplPASS1 userPassword: thatsAcomplPASS2 replace: userPassword userPassword: thatsAcomplPASS3 replace: userPassword userPassword: thatsAcomplPASS4 """) # This surprisingly should work self.delete_force(self.ldb, "cn=testuser2,cn=users," + self.base_dn) self.ldb.add({ "dn": "cn=testuser2,cn=users," + self.base_dn, "objectclass": ["user", "person"], "userPassword": ["thatsAcomplPASS1", "thatsAcomplPASS2"] }) # This surprisingly should work self.delete_force(self.ldb, "cn=testuser2,cn=users," + self.base_dn) self.ldb.add({ "dn": "cn=testuser2,cn=users," + self.base_dn, "objectclass": ["user", "person"], "userPassword": ["thatsAcomplPASS1", "thatsAcomplPASS1"] }) def tearDown(self): self.delete_force(self.ldb, "cn=testuser,cn=users," + self.base_dn) self.delete_force(self.ldb, "cn=testuser2,cn=users," + self.base_dn) # Close the second LDB connection (with the user credentials) self.ldb2 = None if not "://" in host: if os.path.isfile(host): host = "tdb://%s" % host else: host = "ldap://%s" % host ldb = SamDB(url=host, session_info=system_session(), credentials=creds, lp=lp) runner = SubunitTestRunner() rc = 0 if not runner.run(unittest.makeSuite(PasswordTests)).wasSuccessful(): rc = 1 sys.exit(rc)