[PATCH] Fix 'net ads changetrustpw'

[Richard Sharpe]

On Wed, Aug 9, 2017 at 9:45 AM, Andreas Schneider via samba-technical
<samba-technical at lists.samba.org> wrote:
> Hi,
>
> as always, untested code is broken code. So I broke 'net ads changetrustpw' in
> Samba 4.6.
>
> The attached patch fixes the issue and adds a tests which verifies that it is
> working.
>
>
> Please review and push if OK.

I have a couple of questions. While it looks OK,

1. I can't see why you changed princ to NULL in the following:

          ret = krb5_set_password(context,
                                                  &creds,
                                                  discard_const_p(char, newpw),
                                                  - princ,
                                                  + NULL,
                                                  &result_code,
                                                  &result_code_string,
                                                  &result_string);

Perhaps it's because we just got a changepw ticket for the princ, so
it is established in the creds who we are changing the password for.

2. Can you fix the indentation in the call to krb5_set_password?

Other than that, I think the backticks are fine until someone changes
them all to bash style $(...) for all tests.

So, conditional RB+ by me.

-- 
Regards,
Richard Sharpe
(何以解憂？唯有杜康。--曹操)