Hi,
On Mon, March 18, 2019 9:22 am, Neal H. Walfield wrote:
Hi Justus,
Thanks for bringing this up.
On Mon, 18 Mar 2019 13:07:21 +0100,
Justus Winter wrote:
I propose to deprecate compression support in OpenPGP.
...
I realize that we cannot suddenly drop decompression support, but I
would suggest to stop emitting compressed data packets. If this
proposal gathers traction, I would be happy to suggest a change to the
standard.
I propose that we change the standard to say:
- Compliant implementations MUST NOT emit compressed data packets.
I would lessen this a tiny bit and say SHOULD NOT. I can still imagine
cases where one MAY want to emit a compressed data packet, especially if
the sender and receiver have some out-of-band knowledge.
- For backwards compatibility, compliant implementations MAY
decompress compressed data packets.
I would also change this to SHOULD, because IMHO backwards compatibility
is important and there are decades of compressed data out there.
Obviously, we should deprecate the "Preferred Compression Algorithms"
subpacket as well.
Note: removing compression support was one of the original goals:
Subject: [openpgp] details of 4880bis work
From: Stephen Farrell <stephen(_dot_)farrell(_at_)cs(_dot_)tcd(_dot_)ie>
Message-ID: <5527B621(_dot_)3040104(_at_)cs(_dot_)tcd(_dot_)ie>
Date: Fri, 10 Apr 2015 12:38:09 +0100
Archived-At:
<http://mailarchive.ietf.org/arch/msg/openpgp/ll36RGS81vXSXkVey0cR0zZ7WkI>
...
g) remove compression entirely
I am not against removing it, but it should be deprecated first IMHO.
...
:) Neal
-derek
--
Derek Atkins 617-623-3745
derek(_at_)ihtfp(_dot_)com www.ihtfp.com
Computer and Internet Security Consultant
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