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Re: [kitten] GSS-only enctypes

Greg Hudson <ghudson@mit.edu> Wed, 01 April 2015 21:00 UTC

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Date: Wed, 01 Apr 2015 17:00:03 -0400
From: Greg Hudson <ghudson@mit.edu>
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To: Benjamin Kaduk <kaduk@mit.edu>, Nico Williams <nico@cryptonector.com>
References: <CAK3OfOj+Pe8kdAqfXR5EJgw38ekHSUwYv7NBEAZU3FpScbH3cw@mail.gmail.com> <alpine.GSO.1.10.1504011603320.22210@multics.mit.edu>
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Subject: Re: [kitten] GSS-only enctypes
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On 04/01/2015 04:04 PM, Benjamin Kaduk wrote:
> I'm not sure that we got enough active input at the meeting on this
> question to be able to declare consensus.  Regardless, we should ask the
> list if there are objections to (or support for) using the Kerberos
> enctype number space for enctypes with restricted usability (i.e., only
> for subsession keys, or GSS, etc.).

I didn't totally understand all of Nico's reasoning about this when he
spoke at the meeting.  In general I think it's fine; it lets us
negotiate AEAD enctypes using RFC 4537 enctype negotation and the
existing subkey fields when mutual auth is used.

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