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Re: [COSE] Key identifier of type bstr / int

Anders Rundgren <anders.rundgren.net@gmail.com> Mon, 21 March 2022 18:32 UTC

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Date: Mon, 21 Mar 2022 19:32:10 +0100
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To: Benjamin Kaduk <kaduk@mit.edu>, Laurence Lundblade <lgl@island-resort.com>
Cc: Göran Selander <goran.selander@ericsson.com>, Orie Steele <orie@transmute.industries>, "cose@ietf.org" <cose@ietf.org>
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From: Anders Rundgren <anders.rundgren.net@gmail.com>
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Subject: Re: [COSE] Key identifier of type bstr / int
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On 2022-03-21 19:18, Benjamin Kaduk wrote:
<snip>

> So, if you make it required that you have exactly one of 'kid' or 'intkid',
> you need signaling to know which one to use.  If you have that signaling,
> it's not a huge stretch to instead use the signaling for "okay, 'kid' can
> be int now". 

+1

Most signature schemes need to be profiled anyway.  In a use case where every byte counts, RSA keys would for example not be accepted.

Anders

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