ssl_stapling_verify: do we need 'ssl_trusted_certificate' if the intermediate certs are present in ssl_certificate?

[Jeffrey 'jf' Lim]

On Wed, Sep 29, 2021 at 9:42 PM Jeffrey 'jf' Lim <jfs.world at gmail.com> wrote:
>
> On Wed, Sep 29, 2021 at 9:24 PM Maxim Dounin <mdounin at mdounin.ru> wrote:
> >
> > Hello!
> >
> > On Wed, Sep 29, 2021 at 12:47:58PM +0800, Jeffrey 'jf' Lim wrote:
> >
> > > http://nginx.org/en/docs/http/ngx_http_ssl_module.html#ssl_stapling
> > > has a note about not needing 'ssl_trusted_certificate' if
> > > ssl_certificate has intermediate certificates. I do not see a similar
> > > note for ssl_stapling_verify
> > > (http://nginx.org/en/docs/http/ngx_http_ssl_module.html#ssl_stapling_verify)
> > > though. Is this also the same?
> >
> > No.  To verify OCSP response OpenSSL needs a full chain up to a
> > trusted root certificate.
> >
>
> Ok. I am reading the description for ssl_stapling again, and am
> wanting to clarify a few things.
>
> if "ssl_stapling on":
>   if the certificate of the server certificate issuer is present in
> <ssl_certificate>, we do not need to have <ssl_trusted_certificate>
>   otherwise <ssl_trusted_certificate> must have the certificate of the
> server certificate issuer
>
> if "ssl_stapling_verify on":
>    if <ssl_certificate> has the full chain, we *still* need
> <ssl_trusted_certificate>
>
> Is my understanding correct?
>

sorry, but can I get a clarification on whether my understanding is correct?

thanks,
-jf