Re: [OAUTH-WG] OAuth Milestone Update and Rechartering

[Justin Richer <[e-mail]>]

Actually, it's about OAuth compatibility. With OAuth, you get an access 
token to be used at a protected resource. That's what it's for, that's 
what clients do the OAuth dance(s) for. Connect defines that protected 
resource as the userinfo endpoint (ie, "tells the client what to do with 
it"). Connect also defines the id token that comes in along side of the 
bog-standard OAuth token, and Connect is turned on and off through the 
use of bog-standard OAuth scopes. So that makes it very, very, very easy 
to take an OAuth server and turn it into a Connect server. I know, I've 
done just that, and I've walked others through the process as well.

But the a4c draft is using something that's almost-but-not-quite-OAuth: 
You might not get an access token, which is going to confuse the heck 
out of most OAuth clients that I know since that's what they're trying 
to get at in the first place, and there's no real way for a client to 
distinguish its request for something with an id_token vs. without. 
Additionally, in practice, that access token is hugely useful. Just look 
at all of the weird OpenID2 and OAuth1 hybrid stuff that people were 
trying to do back a few years ago on top of all the OpenID2 extensions 
-- this is exactly because OpenID2 was built for "authentication only" 
because that's what people thought developers wanted, but it turned out 
that developers wanted a whole lot more than that. This is one main 
reason the Facebook Connect and Twitter's OAuth-based login came along 
and ate everyone's lunch: they gave you authentication, but also 
something useful about the end user.

All said, it sounds like you want Connect but without the UserInfo 
Endpoint. You'll be glad to know that you can already do that as per the 
MTI definitions of the server:

   http://openid.net/specs/openid-connect-core-1_0.html#ServerMTI

You are free to implement a SCIM endpoint (which, by the way, you'll 
probably need that access_token to access) or no endpoint at all, and a 
compliant client ought to be able to deal with that. In fact, there's a 
way to get just the id_token in Connect if that's all you care about, 
but instead of hiding it inside of an existing flow that might return 
something different depending on (currently-undefined) special 
circumstances, it puts this mode into a separate response_type entirely 
to enforce the point that it is different from regular OAuth.

  -- Justin

On 5/14/2014 9:24 PM, Phil Hunt wrote:
> It isn’t required (or should not be).  This issue is OIDC compatibility.
>
> Phil
>
> @independentid
> www.independentid.com <http://www.independentid.com>
> [e-mail] <mailto:[e-mail]>
>
>
>
> On May 14, 2014, at 6:21 PM, Justin Richer <[e-mail] 
> <mailto:[e-mail]>> wrote:
>
>> How is this functionally different from the a4c draft that also 
>> allows the return of both an id_token and an access token?
>>
>>  -- Justin
>>
>> On 5/14/2014 9:18 PM, Phil Hunt wrote:
>>> That’s not a minimalistic authn only profile.
>>>
>>> If you return both an access token AND an id token than the service 
>>> provide has to implement both and the client has to figure out what 
>>> to do with it.
>>>
>>> Phil
>>>
>>> @independentid
>>> www.independentid.com <http://www.independentid.com/>
>>> [e-mail] <mailto:[e-mail]>
>>>
>>>
>>>
>>> On May 14, 2014, at 5:44 PM, Chuck Mortimore 
>>> <[e-mail] <mailto:[e-mail]>> wrote:
>>>
>>>> "I had personally requested the OIDC community about six months ago 
>>>> to describe some minimal subset which we could all reasonably 
>>>> implement."
>>>>
>>>> I believe you're looking for this: 
>>>> http://openid.net/specs/openid-connect-basic-1_0.html
>>>>
>>>> -cmort
>>>>
>>>>
>>>>
>>>> On Wed, May 14, 2014 at 5:37 PM, Prateek Mishra 
>>>> <[e-mail] <mailto:[e-mail]>> wrote:
>>>>
>>>>     Anil,
>>>>
>>>>     the challenge is that OIDC is a rather large set of
>>>>     specifications, and to my knowledge even the core specification
>>>>     has NOT found
>>>>     a complete implementation at any large IdP. I am not talking
>>>>     here about boutique toolkits or startups, I am talking about
>>>>     the folks
>>>>     who have 100s of millions of users. And, BTW, implementing a
>>>>     few arbitrarily selected features from OIDC is not the same as
>>>>     implementing OIDC.
>>>>
>>>>     As we all know, the core problem is that of adding an
>>>>     authenticator token to OAuth flows, which is a rather modest
>>>>     extension to OAuth.
>>>>
>>>>     I had personally requested the OIDC community about six months
>>>>     ago to describe some minimal subset which we could all
>>>>     reasonably implement. I was told that  the specification was
>>>>     "locked down" and fully debugged and so on, so no changes could
>>>>     be made. Imagine my surprise to find that in the final drafts
>>>>     there was a whole new flow - the hybrid flow - that had been
>>>>     added at the last minute. I had never heard of the hybrid flow
>>>>     in the OAuth context - have you? So now you have an even larger
>>>>     specification!
>>>>
>>>>     The value of draft-hunt-oauth-v2-user-a4c-01 is that it
>>>>     describes precisely a minimal extension to OAuth flows to
>>>>     support an authenticator token.  In my experience, this is the
>>>>     subset that most customers and implementors are looking for.
>>>>
>>>>
>>>>     - prateek
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>     Tony/Phil,
>>>>>       any chance you can have this work done at OIDC?
>>>>>
>>>>>     The reason is that it is commonly understood/accepted now that
>>>>>     OAuth provides authorization related specs while
>>>>>     authentication/profile
>>>>>     related specs are coming from OIDC (which builds on top of
>>>>>     OAuth2).
>>>>>
>>>>>     Regards,
>>>>>     Anil
>>>>>
>>>>>     On 05/14/2014 10:47 AM, Anthony Nadalin wrote:
>>>>>>
>>>>>>     I agree with Phil on this one, there are implementations of
>>>>>>     this already and much interest
>>>>>>
>>>>>>     *From:*OAuth [mailto:[e-mail]] *On Behalf Of
>>>>>>     *Phil Hunt
>>>>>>     *Sent:* Wednesday, May 14, 2014 8:32 AM
>>>>>>     *To:* Brian Campbell
>>>>>>     *Cc:* [e-mail] <mailto:[e-mail]>
>>>>>>     *Subject:* Re: [OAUTH-WG] OAuth Milestone Update and Rechartering
>>>>>>
>>>>>>
>>>>>>     On the contrary. I and others are interested.
>>>>>>
>>>>>>
>>>>>>     We are waiting for the charter to pick up the work.
>>>>>>
>>>>>>
>>>>>>     Regardless there will be a new draft shortly.
>>>>>>
>>>>>>
>>>>>>     Phil
>>>>>>
>>>>>>
>>>>>>     On May 14, 2014, at 5:24, Brian Campbell
>>>>>>     <[e-mail]
>>>>>>     <mailto:[e-mail]>> wrote:
>>>>>>
>>>>>>         I would object to 'OAuth Authentication' being picked up
>>>>>>         by the WG as a work item. The starting point draft has
>>>>>>         expired and it hasn't really been discusses since Berlin
>>>>>>         nearly a year ago.  As I recall, there was only very
>>>>>>         limited interest in it even then. I also don't believe it
>>>>>>         fits well with the WG charter.
>>>>>>
>>>>>>         I would suggest the WG consider picking up 'OAuth
>>>>>>         Symmetric Proof of Possession for Code Extension' for
>>>>>>         which there is an excellent starting point of
>>>>>>         http://tools.ietf.org/html/draft-sakimura-oauth-tcse-03 -
>>>>>>         it's a relativity simple security enhancement which
>>>>>>         addresses problems currently being encountered in
>>>>>>         deployments of native clients.
>>>>>>
>>>>>>
>>>>>>         On Thu, May 8, 2014 at 3:04 PM, Hannes Tschofenig
>>>>>>         <[e-mail]
>>>>>>         <mailto:[e-mail]>> wrote:
>>>>>>
>>>>>>             Hi all,
>>>>>>
>>>>>>             you might have seen that we pushed the assertion
>>>>>>             documents and the JWT
>>>>>>             documents to the IESG today. We have also updated the
>>>>>>             milestones on the
>>>>>>             OAuth WG page.
>>>>>>
>>>>>>             This means that we can plan to pick up new work in
>>>>>>             the group.
>>>>>>             We have sent a request to Kathleen to change the
>>>>>>             milestone for the OAuth
>>>>>>             security mechanisms to use the proof-of-possession
>>>>>>             terminology.
>>>>>>
>>>>>>             We also expect an updated version of the dynamic
>>>>>>             client registration
>>>>>>             spec incorporating last call feedback within about 2
>>>>>>             weeks.
>>>>>>
>>>>>>             We would like you to think about adding the following
>>>>>>             milestones to the
>>>>>>             charter as part of the re-chartering effort:
>>>>>>
>>>>>>             -----
>>>>>>
>>>>>>             Nov 2014 Submit 'Token introspection' to the IESG for
>>>>>>             consideration as a
>>>>>>             Proposed Standard
>>>>>>             Starting point: <draft-richer-oauth-introspection-04>
>>>>>>
>>>>>>             Jan 2015 Submit 'OAuth Authentication' to the IESG
>>>>>>             for consideration as
>>>>>>             a Proposed Standard
>>>>>>             Starting point: <draft-hunt-oauth-v2-user-a4c-01>
>>>>>>
>>>>>>             Jan 2015 Submit 'Token Exchange' to the IESG for
>>>>>>             consideration as a
>>>>>>             Proposed Standard
>>>>>>             Starting point: <draft-jones-oauth-token-exchange-00>
>>>>>>
>>>>>>             -----
>>>>>>
>>>>>>             We also updated the charter text to reflect the
>>>>>>             current situation. Here
>>>>>>             is the proposed text:
>>>>>>
>>>>>>             -----
>>>>>>
>>>>>>             Charter for Working Group
>>>>>>
>>>>>>
>>>>>>             The Web Authorization (OAuth) protocol allows a user
>>>>>>             to grant a
>>>>>>             third-party Web site or application access to the
>>>>>>             user's protected
>>>>>>             resources, without necessarily revealing their
>>>>>>             long-term credentials,
>>>>>>             or even their identity. For example, a photo-sharing
>>>>>>             site that
>>>>>>             supports OAuth could allow its users to use a
>>>>>>             third-party printing Web
>>>>>>             site to print their private pictures, without
>>>>>>             allowing the printing
>>>>>>             site to gain full control of the user's account and
>>>>>>             without having the
>>>>>>             user share his or her photo-sharing sites' long-term
>>>>>>             credential with
>>>>>>             the printing site.
>>>>>>
>>>>>>             The OAuth 2.0 protocol suite encompasses
>>>>>>
>>>>>>             * a protocol for obtaining access tokens from an
>>>>>>             authorization
>>>>>>             server with the resource owner's consent,
>>>>>>             * protocols for presenting these access tokens to
>>>>>>             resource server
>>>>>>             for access to a protected resource,
>>>>>>             * guidance for securely using OAuth 2.0,
>>>>>>             * the ability to revoke access tokens,
>>>>>>             * standardized format for security tokens encoded in
>>>>>>             a JSON format
>>>>>>               (JSON Web Token, JWT),
>>>>>>             * ways of using assertions with OAuth, and
>>>>>>             * a dynamic client registration protocol.
>>>>>>
>>>>>>             The working group also developed security schemes for
>>>>>>             presenting
>>>>>>             authorization tokens to access a protected resource.
>>>>>>             This led to the
>>>>>>             publication of the bearer token, as well as work that
>>>>>>             remains to be
>>>>>>             completed on proof-of-possession and token exchange.
>>>>>>
>>>>>>             The ongoing standardization effort within the OAuth
>>>>>>             working group will
>>>>>>             focus on enhancing interoperability and functionality
>>>>>>             of OAuth
>>>>>>             deployments, such as a standard for a token
>>>>>>             introspection service and
>>>>>>             standards for additional security of OAuth requests.
>>>>>>
>>>>>>             -----
>>>>>>
>>>>>>             Feedback appreciated.
>>>>>>
>>>>>>             Ciao
>>>>>>             Hannes & Derek
>>>>>>
>>>>>>
>>>>>>
>>>>>>             _______________________________________________
>>>>>>             OAuth mailing list
>>>>>>             [e-mail] <mailto:[e-mail]>
>>>>>>             https://www.ietf.org/mailman/listinfo/oauth
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>         -- 
>>>>>>
>>>>>>         Ping Identity logo <https://www.pingidentity.com/>
>>>>>>
>>>>>>         	
>>>>>>
>>>>>>         *Brian Campbell*
>>>>>>         Portfolio Architect
>>>>>>
>>>>>>         *@*
>>>>>>
>>>>>>         	
>>>>>>
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>>>>>>         <mailto:[e-mail]>
>>>>>>
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>>>>>>
>>>>>>     _______________________________________________
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>>>>>
>>>>>
>>>>>
>>>>>     _______________________________________________
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>>>>>     https://www.ietf.org/mailman/listinfo/oauth
>>>>
>>>>
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