That's a good point :) We may want to allow batch exchanges for an upgrade 
flow, but you're right, then that doesn't really apply here.

On Jun 29, 2010, at 6:50 PM, Marius Scurtescu wrote:

> On Tue, Jun 29, 2010 at 6:30 PM, Luke Shepard <[email protected]> wrote:
>> One reason is that you may want to exchange tokens in a batch, whereas you 
>> typically can only sign requests individually.
> 
> How does the assertion grant type help in this case? As far as I can
> tell this also allows you to exchange only one token.
> 
> Marius
> 
> 
>> 
>> On Jun 29, 2010, at 6:12 PM, Marius Scurtescu wrote:
>> 
>>> On Tue, Jun 29, 2010 at 8:22 AM, Eran Hammer-Lahav <[email protected]> 
>>> wrote:
>>>> 
>>>> The assertion grant type is really the grant type extension point. 
>>>> Libraries should treat it as a way to support custom grant types. One of 
>>>> the things I would like to see someone draft is how to use OAuth 1.0 
>>>> tokens to obtain OAuth 2.0 tokens using the assertion type. For example, 
>>>> the assertion type can be "http://oauth.net/1.0/token"; , and the assertion 
>>>> itself is some form of the token and signature (or secrets) concatenated 
>>>> into a string (this will maintain the 1.0 security while transitioning to 
>>>> 2.0). This is just a straw man.
>>>> 
>>>> It is important that libraries support this extensibility with some form 
>>>> of a hook or handler so that clients can make requests using assertions 
>>>> from outside the library.
>>> 
>>> An OAuth 1 token assertion as described above would achieve the same
>>> thing as the suggested bridge endpoint. Do you see any advantages on
>>> using an assertion as opposed to a standard OAuth 1 signed request?
>>> 
>>> Marius
>>> _______________________________________________
>>> OAuth mailing list
>>> [email protected]
>>> https://www.ietf.org/mailman/listinfo/oauth
>> 
>> 

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