Re: [openpgp] AEAD Chunk Size

Derek Atkins <derek@ihtfp.com> Fri, 12 April 2019 13:47 UTC

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From: Derek Atkins <derek@ihtfp.com>
To: "brian m. carlson" <sandals@crustytoothpaste.net>
Cc: Jon Callas <joncallas=40icloud.com@dmarc.ietf.org>, openpgp@ietf.org, Justus Winter <justuswinter@gmail.com>, "Neal H. Walfield" <neal@walfield.org>, Jon Callas <joncallas@icloud.com>
References: <87mumh33nc.wl-neal@walfield.org> <878swzp4fb.fsf@europa.jade-hamburg.de> <E65F6E9D-8B0B-466D-936B-E8852F26E1FF@icloud.com> <8736n63bav.wl-neal@walfield.org> <DD6BD098-A048-4513-BAAC-913BF52CDB1D@icloud.com> <20190330001949.GB12419@genre.crustytoothpaste.net>
Date: Fri, 12 Apr 2019 09:37:47 -0400
In-Reply-To: <20190330001949.GB12419@genre.crustytoothpaste.net> (brian m. carlson's message of "Sat, 30 Mar 2019 00:19:49 +0000")
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Subject: Re: [openpgp] AEAD Chunk Size
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[ sorry for coming at this late -- I've been traveling ]

"brian m. carlson" <sandals@crustytoothpaste.net> writes:

> On Thu, Mar 28, 2019 at 07:19:39PM -0700, Jon Callas wrote:
>> Like some interim replies, particularly Bart Butler, I thought we
>> had a rough consensus and that it was approximately:
>> 
>> * MUST support 16KB chunks.
>> * SHOULD support 256K chunks, as these are common (Protonmail).
>> * MAY support larger up to the present very large size.
>> * MAY reject or error out on chunks larger than 16KB, but repeating
>> ourselves, SHOULD support 256K.
>
> I think this is fine. It covers what's requires for interoperability, it
> makes prudent suggestions, and it allows people leeway if they know
> they're the only one consuming their data.

+1.  I support this proposal.

-derek

-- 
       Derek Atkins                 617-623-3745
       derek@ihtfp.com             www.ihtfp.com
       Computer and Internet Security Consultant