Expanding on my previous response, I suggest to resolve Bernard's
concern by adding the following text:
5.6 EAP Key Generation
EAP-EKE can be used for EAP key generation, as defined by [RFC 5247].
When used in this manner, the values required to establish the key
hierarchy are defined as follows:
- Peer-Id is the EAP-EKE ID_P value.
- Server-Id is the EAP-EKE ID_S value.
- Session-Id is the concatenated Type | Nonce_P | Nonce_S, where Type is
the method type defined for EAP-EKE in [Sec. 4.1], a single octet.
Thanks,
Yaron
On 11/16/2010 05:49 PM, Yaron Sheffer wrote:
Hi Bernard,
Thanks for reviewing our document.
In fact both ID_S and ID_P are authenticated in EAP-EKE, not just
asserted, so they can be used as RFC 5247 identities. See for example
http://tools.ietf.org/html/draft-sheffer-emu-eap-eke-09#section-5.1.
A more detailed response will follow once we've hashed out the details
of Session-ID.
Thanks,
Yaron
Date: Mon, 15 Nov 2010 20:43:46 -0800
From: Bernard Aboba<bernard_aboba@xxxxxxxxxxx>
Subject: Problem with draft-sheffer-emu-eap-eke
To:<iesg@xxxxxxxx>,<ietf@xxxxxxxx>
Message-ID:<BLU104-W201F08439317108F9749193370@xxxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
I just took a look at the EAP EKE document recently approved by the
IESG for publication as an Informational RFC:
http://tools.ietf.org/html/draft-sheffer-emu-eap-eke-09
The document does not define the following parameters required by RFC
5247:
1. Peer-Id
2. Server-Id
3. Session-Id
In particular, the omission of the Session-Id is a significant
problem, since this is required for EAP methods
to be usable within IEEE 802.1X-2010.
My suggestion is that ID_P be designated as the Peer-Id. Since the
Server identity is not authenticated (just asserted), it is not clear
to me whether ID_S is suitable for use as the Server-Id.
My suggestion is that the Session-Id be defined as follows:
Session-Id = Type-Code || Nonce_P || Nonce_S
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