Re: [saag] RADIUS is deprecating MD5

Alan DeKok <aland@deployingradius.com> Mon, 01 April 2024 13:14 UTC

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From: Alan DeKok <aland@deployingradius.com>
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Date: Mon, 01 Apr 2024 09:14:09 -0400
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To: Peter Gutmann <pgut001@cs.auckland.ac.nz>
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Subject: Re: [saag] RADIUS is deprecating MD5
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On Apr 1, 2024, at 9:05 AM, Peter Gutmann <pgut001@cs.auckland.ac.nz> wrote:
> The devices are already on the network, RADIUS isn't doing any access control,
> or in fact anything at all as far as I can tell.  In fact at least one
> "RADIUS" implementation I've seen used in this situation is nothing more than
> some code to add the necessary wrappers on send and strip them on receive.
> Same with the "EAP" implementation.  The only bit that has any effect is the
> auth inside the TLS tunnel, and whether you get back an "OK" or "not-OK"
> response to that.

  Again, that design is extremely unusual.  You cannot take one limited use-case, and use it as the foundation for an extravagant claim that RADIUS is little more than a dumb transport.

  That limited use-case is not only irrelevant to the more common use-cases of RADIUS, I have to question the competence of anyone who's designed and built it.  As Wolfgang Pauli said, "It's not even wrong".

  I see I can't convince you as to how RADIUS actually works.  So I'll leave well enough alone, and move on to more productive endeavours.

  Alan DeKok.