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Re: [openpgp] Put Signature in an Email's Header

Kai Engert <kaie@kuix.de> Wed, 09 August 2023 08:32 UTC

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Date: Wed, 09 Aug 2023 10:32:20 +0200
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To: Andrew Gallagher <andrewg=40andrewg.com@dmarc.ietf.org>
Cc: Wiktor Kwapisiewicz <wiktor=40metacode.biz@dmarc.ietf.org>, openpgp@ietf.org
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From: Kai Engert <kaie@kuix.de>
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Subject: Re: [openpgp] Put Signature in an Email's Header
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On 08.08.23 19:09, Andrew Gallagher wrote:
> I’d be wary of such a double-encapsulation, it feels fragile.

This is what we currently do when combining a signature and protected 
headers:

multipart/signed (application/pgp-signature)
     multipart/mixed (protected-headers)
         headers
         payload
     signature data

And the new suggestion is:

multipart/mixed
     signature-as-a-header
     multipart/mixed (protected-headers)
         headers
         payload

Given that both use two layers around the payload, why do you consider 
the new suggestion more fragile?

Kai

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