gpo: Test certificate policy without NDES
As of
8231eaf856b, the NDES feature is no longer required on Windows, as
cert auto-enroll can use the certificate from the LDAP request.
However,
157335ee93e changed the implementation to convert the LDAP
certificate to base64 due to it failing to cleanly convert to a string.
Because of insufficient test coverage I missed handling the part where
NDES is disabled or not reachable and the LDAP certificate was imported.
The call to load_der_x509_certificate now fails with an error because it
expects binary data, yet it receives a base64 encoded string.
This adds a test to confirm the issue.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15557
Signed-off-by: Gabriel Nagy <gabriel.nagy@canonical.com>
Reviewed-by: David Mulder <dmulder@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>