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Re: [OAUTH-WG] RSA signing and web delegation



One question: Is RSA is really essential here? I think not (why not use ECC or any other PKI algorithm instead?). So, I would agree with Brian so long as RSA is replaced with PKI.

Igor

Eran Hammer-Lahav wrote:
I like this approach. It keeps the RSA signing in the delegation flow and not in the generic authentication method. This keeps the token as the sole authentication tool when making protected resources requests (no client credentials or RSA keys).

EHL

-----Original Message-----
From: oauth-bounces at ietf.org [mailto:oauth-bounces at ietf.org] On Behalf
Of Brian Eaton
Sent: Thursday, November 05, 2009 5:32 PM
To: oauth at ietf.org
Subject: [OAUTH-WG] RSA signing and web delegation

I spent a bit of time today wondering how to integrate RSA signing in
OAuth (which has obvious key distribution advantages) with requests
that only send access tokens (which has obvious usability advantages).

The only way I can think of to resolve these conflicts goes like this:

1) Initial requests for user approval (using the web delegation flow)
are signed using RSA.

2) Data requests are either not signed, or are signed only with the
token secret using HMAC.

3) Requests to renew access tokens (if we adopt something like the
scalable OAuth extension) are again signed using RSA.

Thoughts?

Cheers,
Brian
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