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Re: [OAUTH-WG] Indicating sites where a token is valid

"Manger, James H" <James.H.Manger@team.telstra.com> Fri, 07 May 2010 06:14 UTC

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From: "Manger, James H" <James.H.Manger@team.telstra.com>
To: Torsten Lodderstedt <torsten@lodderstedt.net>
Date: Fri, 07 May 2010 16:14:06 +1000
Thread-Topic: [OAUTH-WG] Indicating sites where a token is valid
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Subject: Re: [OAUTH-WG] Indicating sites where a token is valid
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> what about an additional realm response value?



My original suggestion(http://www.ietf.org/mail-archive/web/oauth/current/msg01920.html) had a “realm” in addition to “sites”. I still think that should be present (though more to match the HTTP auth model (RFC2617) than an expectation that it will be used by most services).





> If there is a binding between realm and token, the client can decide based on the realm attribute discovered using a WWW-Authenticate response which token to use.



“realm” is not sufficient, however. A “realm” doesn’t stop you sending a token to a bad site. Even if an app makes and unauthenticated call first, there is nothing to stop the bad site responding with a WWW-Auth header with the right “realm” value so the client app will reveal the token.





--

James Manger

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