Re: [OPSAWG] WG LC: draft-ietf-opsawg-finding-geofeeds

George Michaelson <ggm@algebras.org> Wed, 03 February 2021 03:10 UTC

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From: George Michaelson <ggm@algebras.org>
Date: Wed, 3 Feb 2021 13:10:39 +1000
Message-ID: <CAKr6gn3xsZsht=oJsKfg+W3BcDjR8tYd1kQCJ-noK2PedwgmKQ@mail.gmail.com>
To: Job Snijders <job=40fastly.com@dmarc.ietf.org>
Cc: opsawg@ietf.org
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Subject: Re: [OPSAWG] WG LC: draft-ietf-opsawg-finding-geofeeds
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I think this is useful.

It shows how tools that operations people are familiar with can be
used to improve the trust in the feed.

Nice work Job!

-G

On Wed, Feb 3, 2021 at 12:25 PM Job Snijders
<job=40fastly.com@dmarc.ietf.org> wrote:
>
> Dear Randy, working group,
>
> It appears to me you really wanted to ask 'how the heck did you do it???'
>
> *** warning: operating a CA is real work, do NOT follow the below ***
>
> I declared my signing operation 'proprietary' because I can't recommend
> it as a 'recipe'. I prefer to promote man pages over howtos; especially
> when signing operators need to walk the path towards production
> environment.
>
> My objective in sharing a real-world example @ 2001:67c:208c::/48 is to
> facilitate the 'draft-ietf-opsawg-finding-geofeeds' effort. I imagine
> publishing a publicly verifable real-world example helps validator
> implementers. Validators ofcourse should assume extreme hostile input.
>
> My show case was generated without any assistance or communication with
> the authors of the draft. In doing so, hopefully proving (or disproving)
> the draft is readable and understandable, so that implementers can
> produce similar results.
>
> As you asked how exactly the 'kroket' is made....
>
> On Tue, Feb 02, 2021 at 02:33:54PM -0800, Randy Bush wrote:
> > > The signature was produced through proprietary means, but for the
> > > purpose of validating the signature & interopability testing that
> > > shouldn't matter...  right?
> >
> > unless you are a security person and lived through trojans such as
> > dual-ec.  extension of kerckhoffs's principle.
>
> I used modern versions of libressl and openssl to generate the EE cert
> and the signature.
>
>     $ openssl cms -sign \
>         -econtent_type 1.2.840.113549.1.9.16.1.47 \
>         -nosmimecap \
>         -md sha256 \
>         -signer ee.cert \
>         -inkey ee.key \
>         -in geofeed.csv \
>         -outform DER \
>         -out signature.der
>
> The EE cert was created with a CSR and a lengthy .cnf file. The
> '1.2.840.113549.1.9.16.1.47' string can be replaced with a text string
> after OpenSSL merges in https://github.com/openssl/openssl/pull/14050
> The 'free, functional, secure, and mostly compatible public-API'
> LibreSSL project appears comfortable adding the OID based on just the
> IANA registry.
>
> Kind regards,
>
> Job
>
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