diff options
author | Isaac Boukris <iboukris@gmail.com> | 2020-05-06 15:54:55 +0200 |
---|---|---|
committer | Andrew Bartlett <abartlet@samba.org> | 2020-06-12 20:42:38 +0000 |
commit | 9b302a57ff0d4c3a373f762f2ad4daf736b0853b (patch) | |
tree | d2f18761a3c5c1eb7ae8340f60895612c3d76d99 /python | |
parent | a823cc1e8bc9a68a7e662022705039397a5df7e1 (diff) | |
download | samba-9b302a57ff0d4c3a373f762f2ad4daf736b0853b.tar.gz |
selftest: test forwardable flag in cross-realm tgt tickets
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14233
Signed-off-by: Isaac Boukris <iboukris@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Diffstat (limited to 'python')
-rwxr-xr-x | python/samba/tests/krb5/xrealm_tests.py | 180 | ||||
-rw-r--r-- | python/samba/tests/usage.py | 1 |
2 files changed, 181 insertions, 0 deletions
diff --git a/python/samba/tests/krb5/xrealm_tests.py b/python/samba/tests/krb5/xrealm_tests.py new file mode 100755 index 00000000000..64064b8a670 --- /dev/null +++ b/python/samba/tests/krb5/xrealm_tests.py @@ -0,0 +1,180 @@ +#!/usr/bin/env python3 +# Unix SMB/CIFS implementation. +# Copyright (C) Stefan Metzmacher 2020 +# +# 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/>. +# + +import sys +import os + +sys.path.insert(0, "bin/python") +os.environ["PYTHONUNBUFFERED"] = "1" + +from samba.tests.krb5.raw_testcase import RawKerberosTest +import samba.tests.krb5.rfc4120_pyasn1 as krb5_asn1 +import samba.tests + +global_asn1_print = False +global_hexdump = False + +class XrealmKerberosTests(RawKerberosTest): + + def setUp(self): + super(XrealmKerberosTests, self).setUp() + self.do_asn1_print = global_asn1_print + self.do_hexdump = global_hexdump + + def test_xrealm(self): + user_creds = self.get_user_creds() + user = user_creds.get_username() + realm = user_creds.get_realm() + + cname = self.PrincipalName_create(name_type=1, names=[user]) + sname = self.PrincipalName_create(name_type=2, names=["krbtgt", realm]) + + till = self.get_KerberosTime(offset=36000) + + kdc_options = krb5_asn1.KDCOptions('forwardable') + padata = None + + etypes=(18,17,23) + + req = self.AS_REQ_create(padata=padata, + kdc_options=str(kdc_options), + cname=cname, + realm=realm, + sname=sname, + from_time=None, + till_time=till, + renew_time=None, + nonce=0x7fffffff, + etypes=etypes, + addresses=None, + EncAuthorizationData=None, + EncAuthorizationData_key=None, + additional_tickets=None) + rep = self.send_recv_transaction(req) + self.assertIsNotNone(rep) + + self.assertEqual(rep['msg-type'], 30) + self.assertEqual(rep['error-code'], 25) + rep_padata = self.der_decode(rep['e-data'], asn1Spec=krb5_asn1.METHOD_DATA()) + + for pa in rep_padata: + if pa['padata-type'] == 19: + etype_info2 = pa['padata-value'] + break + + etype_info2 = self.der_decode(etype_info2, asn1Spec=krb5_asn1.ETYPE_INFO2()) + + key = self.PasswordKey_from_etype_info2(user_creds, etype_info2[0]) + + (patime, pausec) = self.get_KerberosTimeWithUsec() + pa_ts = self.PA_ENC_TS_ENC_create(patime, pausec) + pa_ts = self.der_encode(pa_ts, asn1Spec=krb5_asn1.PA_ENC_TS_ENC()) + + enc_pa_ts_usage = 1 + pa_ts = self.EncryptedData_create(key, enc_pa_ts_usage, pa_ts) + pa_ts = self.der_encode(pa_ts, asn1Spec=krb5_asn1.EncryptedData()) + + pa_ts = self.PA_DATA_create(2, pa_ts) + + kdc_options = krb5_asn1.KDCOptions('forwardable') + padata = [pa_ts] + + req = self.AS_REQ_create(padata=padata, + kdc_options=str(kdc_options), + cname=cname, + realm=realm, + sname=sname, + from_time=None, + till_time=till, + renew_time=None, + nonce=0x7fffffff, + etypes=etypes, + addresses=None, + EncAuthorizationData=None, + EncAuthorizationData_key=None, + additional_tickets=None) + rep = self.send_recv_transaction(req) + self.assertIsNotNone(rep) + + msg_type = rep['msg-type'] + self.assertEqual(msg_type, 11) + + usage = 3 + enc_part2 = key.decrypt(usage, rep['enc-part']['cipher']) + + # MIT KDC encodes both EncASRepPart and EncTGSRepPart with application tag 26 + try: + enc_part2 = self.der_decode(enc_part2, asn1Spec=krb5_asn1.EncASRepPart()) + except Exception: + enc_part2 = self.der_decode(enc_part2, asn1Spec=krb5_asn1.EncTGSRepPart()) + + # TGS Request (for cross-realm TGT) + trust_realm = samba.tests.env_get_var_value('TRUST_REALM') + sname = self.PrincipalName_create(name_type=2, names=["krbtgt", trust_realm]) + + kdc_options = krb5_asn1.KDCOptions('forwardable') + till = self.get_KerberosTime(offset=36000) + ticket = rep['ticket'] + ticket_session_key = self.EncryptionKey_import(enc_part2['key']) + padata = [] + + subkey = self.RandomKey(ticket_session_key.etype) + subkey_usage = 9 + + (ctime, cusec) = self.get_KerberosTimeWithUsec() + + req = self.TGS_REQ_create(padata=padata, + cusec=cusec, + ctime=ctime, + ticket=ticket, + kdc_options=str(kdc_options), + cname=cname, + realm=realm, + sname=sname, + from_time=None, + till_time=till, + renew_time=None, + nonce=0x7ffffffe, + etypes=etypes, + addresses=None, + EncAuthorizationData=None, + EncAuthorizationData_key=None, + additional_tickets=None, + ticket_session_key=ticket_session_key, + authenticator_subkey=subkey) + rep = self.send_recv_transaction(req) + self.assertIsNotNone(rep) + + msg_type = rep['msg-type'] + self.assertEqual(msg_type, 13) + + enc_part2 = subkey.decrypt(subkey_usage, rep['enc-part']['cipher']) + enc_part2 = self.der_decode(enc_part2, asn1Spec=krb5_asn1.EncTGSRepPart()) + + # Check the forwardable flag + fwd_pos = len(tuple(krb5_asn1.TicketFlags('forwardable'))) -1 + assert(krb5_asn1.TicketFlags(enc_part2['flags'])[fwd_pos]) + + return + + +if __name__ == "__main__": + global_asn1_print = True + global_hexdump = True + import unittest + unittest.main() diff --git a/python/samba/tests/usage.py b/python/samba/tests/usage.py index 58053474e03..89b5e957407 100644 --- a/python/samba/tests/usage.py +++ b/python/samba/tests/usage.py @@ -88,6 +88,7 @@ EXCLUDE_USAGE = { 'python/samba/tests/krb5/kcrypto.py', 'python/samba/tests/krb5/simple_tests.py', 'python/samba/tests/krb5/s4u_tests.py', + 'python/samba/tests/krb5/xrealm_tests.py', } EXCLUDE_HELP = { |