kdc: correctly generate PAC TGS signature
When generating an AS-REQ, the TGS signature was incorrectly generated using
the server key, which would fail to validate if the server was not also the
TGS. Fix this.
Patch from Isaac Bourkis <iboukris@gmail.com>.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14642
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14881
[jsutton@samba.org Backported from Heimdal commit
e7863e2af922809dad25a2e948e98c408944d551
- Samba's Heimdal version does not have the generate_pac() helper
function.
- Samba's Heimdal version does not use the 'r' context variable.
]
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit
91e684f5dcb48b76e6a322c15acb53cbce5c275a)