tests/krb5: Add test requesting a TGT expiring post-2038

This demonstrates the behaviour of Windows 11 22H2 over Kerberos,
which changed to use a year 9999 date for a forever timetime in
tickets.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15197

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Thu Oct 20 05:00:23 UTC 2022 on sn-devel-184

diff --git a/python/samba/tests/krb5/as_req_tests.py b/python/samba/tests/krb5/as_req_tests.py
index 6a573947067f42f820a94f72d36608dc0b9d0c69..6b3b5ad4a2269c350d3311a8290a931b53d64180 100755 (executable)
--- a/python/samba/tests/krb5/as_req_tests.py
+++ b/python/samba/tests/krb5/as_req_tests.py
@@ -47,7 +47,7 @@ class AsReqBaseTest(KDCBaseTest):
                                   expected_cname=None, sname=None,
                                   name_type=NT_PRINCIPAL, etypes=None,
                                   expected_error=None, expect_edata=None,
-                                  kdc_options=None):
+                                  kdc_options=None, till=None):
         user_name = client_creds.get_username()
         if client_account is None:
             client_account = user_name
@@ -71,7 +71,8 @@ class AsReqBaseTest(KDCBaseTest):
         expected_sname = sname
         expected_salt = client_creds.get_salt()
 
-        till = self.get_KerberosTime(offset=36000)
+        if till is None:
+            till = self.get_KerberosTime(offset=36000)
 
         if etypes is None:
             etypes = client_as_etypes
@@ -516,6 +517,14 @@ class AsReqKerberosTests(AsReqBaseTest):
             sname=wrong_krbtgt_princ,
             expected_error=KDC_ERR_S_PRINCIPAL_UNKNOWN)
 
+    # Test that we can make a request for a ticket expiring post-2038.
+    def test_future_till(self):
+        client_creds = self.get_client_creds()
+
+        self._run_as_req_enc_timestamp(
+            client_creds,
+            till='99990913024805Z')
+
 
 if __name__ == "__main__":
     global_asn1_print = False