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Re: [netmod] x509c2n:cert-to-name problem

Schönwälder, Jürgen <J.Schoenwaelder@jacobs-university.de> Tue, 29 October 2019 10:08 UTC

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From: "Schönwälder, Jürgen" <J.Schoenwaelder@jacobs-university.de>
To: Martin Bjorklund <mbj@tail-f.com>
CC: "randy_presuhn@alumni.stanford.edu" <randy_presuhn@alumni.stanford.edu>, "netmod@ietf.org" <netmod@ietf.org>
Thread-Topic: [netmod] x509c2n:cert-to-name problem
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Date: Tue, 29 Oct 2019 10:08:40 +0000
Message-ID: <20191029100839.vzbnpaw5wv3xivr2@anna.jacobs.jacobs-university.de>
References: <0100016e0416c312-13b65019-1c32-4fc8-b8b2-f2b7cc591a00-000000@email.amazonses.com> <20191028.102216.1541488608391720310.mbj@tail-f.com> <f508c9f9-8493-88dc-7468-edc8dbe11776@alumni.stanford.edu> <20191029.105349.2169510354890358887.mbj@tail-f.com>
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Reply-To: "Schönwälder, Jürgen" <J.Schoenwaelder@jacobs-university.de>
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Subject: Re: [netmod] x509c2n:cert-to-name problem
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On Tue, Oct 29, 2019 at 10:53:49AM +0100, Martin Bjorklund wrote:
> Randy Presuhn <randy_presuhn@alumni.stanford.edu> wrote:
> > Hi -
> > 
> > On 10/28/2019 2:22 AM, Martin Bjorklund wrote:
> > ....
> > > No, in many SMIv2 objects, a zero-length value is used for optional
> > > nodes (due to the way the protocol (SNMP) works).
> > 
> > This comes as a complete surprise to me.  References?
> 
> I don't have any references at hand, so let me re-phrase:
> 
>   No, in many SMIv2 objects, a zero-length value is used for optional
>   nodes.
> 
> (where "optional" means optional to set, not optional to implement)

The protocol handles non-existing values just fine. However, some
implementations did not handle non-existing values in the protocol
properly. MIB module authors sometimes use special values to indicate
the absence of a value in order to please those implementations.

/js

-- 
Juergen Schoenwaelder           Jacobs University Bremen gGmbH
Phone: +49 421 200 3587         Campus Ring 1 | 28759 Bremen | Germany
Fax:   +49 421 200 3103         <https://www.jacobs-university.de/>

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