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Re: [openpgp] Backwards compatibility vs streaming verification of v6 clearsigned messages

Paul Wouters <paul@nohats.ca> Wed, 24 May 2023 21:25 UTC

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From: Paul Wouters <paul@nohats.ca>
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Date: Wed, 24 May 2023 17:25:08 -0400
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References: <FFD589A8-3840-4723-A6E0-BABF90149AB8@andrewg.com>
Cc: Daniel Kahn Gillmor <dkg@fifthhorseman.net>, IETF OpenPGP WG <openpgp@ietf.org>
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To: Andrew Gallagher <andrewg=40andrewg.com@dmarc.ietf.org>
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Subject: Re: [openpgp] Backwards compatibility vs streaming verification of v6 clearsigned messages
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On May 24, 2023, at 16:53, Andrew Gallagher <andrewg=40andrewg.com@dmarc.ietf.org> wrote:
> 
> On 24 May 2023, at 21:43, Daniel Kahn Gillmor <dkg@fifthhorseman.net> wrote:
>> 
>> the thing about the cleartext signing framework is that it's designed
>> (and i think intended) to work on data that will be viewed directly by a
>> human in a program that knows nothing about OpenPGP.
> 
> But if you’re viewing the message in an application that doesn’t understand OpenPGP, you can’t verify the signature - so the fake header is no less trustworthy than the body of the message (that is to say, not at all).

I use alpine to read mail and I can choose to invoke gpg on the content if I want to. Usually I don’t want to - eg for signed msgs to mailing lists. But I can still if the message appears to come from dkg giving me his new phone number 😀

Paul

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