Torsten,

On Jun 4, 2010, at 2:31 PM, Torsten Lodderstedt wrote:

> 
> Am 04.06.2010 19:45, schrieb John Kemp:
>> On Jun 4, 2010, at 1:35 PM, David Recordon wrote:
>> 
>>   
>>> #4 should happen as part of #3.
>>>     
>> How would ALL OAuth 2.0+ clients know to pass along the format if it is 
>> there?
>> 
>> I fail to see the problem with specifying an optional token format parameter 
>> in the main spec. and giving it a default value, and semantics of "opaque" 
>> for when it isn't present (ie. the current case). That explicitly allows 
>> other specifications to use the attribute, and is then good for future 
>> interoperability (and also future backwards-compatibility)
>> 
>>   
> 
> there is another point: such a parameter could be used to let the 
> authorization server indicate the format of the access token to the resource 
> server. This will help deployments with more than one token format in use. 
> For example, we use SAML and another proprietary format. Without such a 
> parameter, the resource server has to somehow (magically) find out the format 
> of the incomming token.

Yes, that's a good additional point.

> 
> From my point of view, #4 should happen now independent of #3.

Agreed.

- johnk

> 
> regards,
> Torsten.
>> - johnk
>> 
>>   
>>> 
>>> On Fri, Jun 4, 2010 at 9:58 AM, George Fletcher<[email protected]>  wrote:
>>> Could I conclude then that "we" are all in "agreement"? :)
>>> 
>>> 1. OAuth 2.0 should not require a structured token (i.e. don't break 
>>> existing use cases)
>>> 2. OAuth 2.0 should not prohibit resource owners supporting multiple 
>>> Authentication Servers
>>> 3. OAuth 2.0 should allow for structured tokens via a separate spec
>>> 4. OAuth 2.0 should consider specifying an additional, optional parameter 
>>> that is opaque to the client but identifies the "token format"
>>> 
>>> Thanks,
>>> George
>>> 
>>> 
>>> On 6/4/10 12:45 PM, Luke Shepard wrote:
>>> On Jun 4, 2010, at 8:41 AM, Dick Hardt wrote:
>>> 
>>> 
>>> There is more to the web than the social web Luke, and supporting multiple 
>>> AS has been a design goal of WRAP and OAuth 2.0 and is being implemented.
>>> 
>>> Whoa, I didn't say there wasn't. I agree that supporting multiple 
>>> authorization servers is a reasonable design goal and there are some people 
>>> who are making that work.
>>> 
>>> I was just pointing that that a common case, today, is to have a single 
>>> authorization server for a given resource - I mentioned several examples of 
>>> services that work this way now. OAuth 2.0 needs to support that use case 
>>> in a clean way.=
>>> 
>>> 
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