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Re: [openpgp] "OpenPGP Simple"

David Shaw <dshaw@jabberwocky.com> Mon, 16 March 2015 21:31 UTC

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From: David Shaw <dshaw@jabberwocky.com>
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Date: Mon, 16 Mar 2015 17:30:55 -0400
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To: David Leon Gil <coruus@gmail.com>
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Cc: Stephen Paul Weber <singpolyma@singpolyma.net>, Werner Koch <wk@gnupg.org>, "openpgp@ietf.org" <openpgp@ietf.org>, gnupg-devel@gnupg.org, Jon Callas <jon@callas.org>
Subject: Re: [openpgp] "OpenPGP Simple"
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On Mar 16, 2015, at 5:15 PM, David Leon Gil <coruus@gmail.com> wrote:
> 
> Re Jon's comment above: The five-octet, new-format thing is what the End-to-End extension does.
> 
> On Monday, March 16, 2015, Werner Koch <wk@gnupg.org> wrote:
> On Mon, 16 Mar 2015 19:12, singpolyma@singpolyma.net said:
> 
> > Yes.  Last time I checked, gnupg < 2 (which is still the default on
> > most of my systems) only generates old-style headers, whereas my
> 
> That depends on how you invoke gpg and whether the new packer headers
> are required.  That is required for PGP-2 compatibility.
> 
> Is there an option to completely disable this?

Not in the current code, but you can of course patch it.

> Relatedly, is there any option to not use new-format partial lengths?

A partial length is needed to handle content as a stream - say some program that generates gigabytes of data (like a backup).  Something large enough that you really don't want to have to buffer the whole thing before encrypting it.

> Partial lengths are really a nuisance to parse.

No argument there...

David

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