Re: [TLS] AES-OCB in TLS [New Version Notification for draft-zauner-tls-aes-ocb-03.txt]

Peter Bowen <pzbowen@gmail.com> Mon, 01 June 2015 16:18 UTC

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Date: Mon, 1 Jun 2015 09:15:59 -0700
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From: Peter Bowen <pzbowen@gmail.com>
To: Aaron Zauner <azet@azet.org>
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Subject: Re: [TLS] AES-OCB in TLS [New Version Notification for draft-zauner-tls-aes-ocb-03.txt]
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On Mon, Jun 1, 2015 at 9:06 AM, Aaron Zauner <azet@azet.org> wrote:
> I agree, but am unsure to what extent they are used in real life. I'm
> trying to reduce the number of cipher-suites that would have to be added
> to the IANA TLS parameter list; since PSK is unsupported with GCM
> cipher-suites it seems only logical to exclude them here as well.

Some TLS implementations (notably BoringSSL) have ended up assigning
non-standard ciphersuites ECDHE+PSK+AES-GCM for this very reason.  I
think the lack of this combination is more of an oversight than
anything.

Thanks,
Peter