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Re: [openpgp] "OpenPGP Simple"

Derek Atkins <warlord@MIT.EDU> Tue, 17 March 2015 15:11 UTC

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From: Derek Atkins <warlord@MIT.EDU>
To: David Shaw <dshaw@jabberwocky.com>
References: <20150315175744.GG2978@singpolyma-liberty> <34C550CB-11A0-4D25-A5CF-78D265FE2435@callas.org> <20150316181213.GF2944@singpolyma-liberty> <87d2484tg4.fsf@vigenere.g10code.de> <CAA7UWsUYFJUWo5Pk4gUZn_qQvMWmhgaiDpZUC7p+FKH8c15TXQ@mail.gmail.com> <ECC76BD6-D0F7-44FB-BCF3-5AD1DF34E613@jabberwocky.com>
Date: Tue, 17 Mar 2015 11:11:04 -0400
In-Reply-To: <ECC76BD6-D0F7-44FB-BCF3-5AD1DF34E613@jabberwocky.com> (David Shaw's message of "Mon, 16 Mar 2015 17:30:55 -0400")
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Cc: "openpgp@ietf.org" <openpgp@ietf.org>, Jon Callas <jon@callas.org>, gnupg-devel@gnupg.org, Stephen Paul Weber <singpolyma@singpolyma.net>, Werner Koch <wk@gnupg.org>, David Leon Gil <coruus@gmail.com>
Subject: Re: [openpgp] "OpenPGP Simple"
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David Shaw <dshaw@jabberwocky.com> writes:

> 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.

This is exactly what it was created for, when you cannot know the size
ahead of time.  Sometimes you *can* know the size, even for large
objects (e.g. you could stat() the file to get the filesize), but
obviously that doesn't work in all cases.

>> Partial lengths are really a nuisance to parse.
>
> No argument there...

I'm sorry.  I blame Colin for trying to be too clever, and me not
working hard enough to talk him out of it.  ;)

> David

-derek

-- 
       Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
       Member, MIT Student Information Processing Board  (SIPB)
       URL: http://web.mit.edu/warlord/    PP-ASEL-IA     N1NWH
       warlord@MIT.EDU                        PGP key available

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