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Re: [Cbor] [COSE] CBOR magic number, file format and tags

Michael Richardson <mcr@sandelman.ca> Fri, 22 January 2021 16:17 UTC

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From: Michael Richardson <mcr@sandelman.ca>
To: worley@ariadne.com
cc: cbor@ietf.org, doug@ewellic.org, cose@ietf.org
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Date: Fri, 22 Jan 2021 11:17:00 -0500
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Subject: Re: [Cbor] [COSE] CBOR magic number, file format and tags
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Dale R. Worley <worley@ariadne.com> wrote:
    > Michael Richardson <mcr+ietf@sandelman.ca> writes:
    >> That tells us that it might be CBOR.
    >>
    >> It does not distinguish a CBOR encoded certificate from a CBOR encoded
    >> RFC8366 artifact, for instance.

    > Uh, yes?  They're both CBOR, right?  It's still the magic number for
    > CBOR.

    > Do you mean to say, you want a place in CBOR to place a magic number
    > that describes the particular kind of CBOR structure this is?

Yes.

    > If so,
    > you should make that clear right at the start of the I-D.  Indeed, in
    > the Abstract, though it needs other work, too.  Checking again, it
    > looks like you don't really lay that out until section 6, whereas I
    > only read it through section 5.  My mistake, but lots of other people
    > will make it as well.

Better wording suggestions welcome.

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