netdev - Re: [PATCH net-next v2 0/5] tls: implement key updates for TLS1.3

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Date:   Wed, 15 Feb 2023 11:10:20 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Sabrina Dubroca <sd@...asysnail.net>
Cc:     netdev@...r.kernel.org, Vadim Fedorenko <vfedorenko@...ek.ru>,
        Frantisek Krenzelok <fkrenzel@...hat.com>,
        Kuniyuki Iwashima <kuniyu@...zon.com>,
        Apoorv Kothari <apoorvko@...zon.com>,
        Boris Pismenny <borisp@...dia.com>,
        John Fastabend <john.fastabend@...il.com>,
        Shuah Khan <shuah@...nel.org>, linux-kselftest@...r.kernel.org,
        Gal Pressman <gal@...dia.com>,
        Marcel Holtmann <marcel@...tmann.org>
Subject: Re: [PATCH net-next v2 0/5] tls: implement key updates for TLS1.3

On Wed, 15 Feb 2023 18:29:50 +0100 Sabrina Dubroca wrote:
> > And how will we handle re-keying in offload?  
> 
> Sorry for the stupid question... do you mean that I need to solve that
> problem before this series can progress, or that the cover letter
> should summarize the state of the discussion?

I maintain that 1.3 offload is much more important than rekeying.
Offloads being available for 1.2 may be stalling adoption of 1.3
(just a guess, I run across this article mentioning 1.2 being used
in Oracle cloud for instance:
https://blogs.oracle.com/cloudsecurity/post/how-oci-helps-you-protect-data-with-default-encryption
could be because MITM requirements, or maybe they have HW which
can only do 1.2? Dunno).

But I'm willing to compromise, we just need a solid plan of how to
handle the inevitable. I'm worried that how this will pay out is:
 - you don't care about offload and add rekey
 - vendors don't care about rekey and add 1.3
  ... time passes ...
 - both you and the vendors have moved on
 - users run into issues, waste their time debugging and
   eventually report the problem upstream
 - it's on me to fix?

:(