Do the PKCE authors want to make a concrete proposal for how to represent this 
in discovery metadata?

From: OAuth [mailto:[email protected]] On Behalf Of John Bradley
Sent: Friday, January 29, 2016 6:11 AM
To: Nat Sakimura <[email protected]>
Cc: [email protected]
Subject: Re: [OAUTH-WG] OAuth Discovery metadata values added for revocation, 
introspection, and PKCE

The only problem with that is the client may only require it for some types of 
clients (public) or response types.

It may need to be finer grained than that, or define it as required for all 
public clients using the token endpoint.

John B.


On Jan 29, 2016, at 10:15 AM, Nat Sakimura 
<[email protected]<mailto:[email protected]>> wrote:

Good question.

It's probably a good idea to be able to advertise this policy in the discovery.

Perhaps in the line of

pkce_required or rfc7636_required?
The value should be Boolean.

Nat from iPhone

2016年1月29日(金) 21:23 Vladimir Dzhuvinov 
<[email protected]<mailto:[email protected]>>:
Thanks Mike, the updated spec looks good!

I have a question related to PKCE:

The PKCE spec seems to imply that an AS may require public clients to use a 
code challenge:

https://tools.ietf.org/html/rfc7636#section-4.4.1

If an AS has such a policy in place, how is this to be advertised? Or is that 
supposed to the enforced when the client gets registered (there are no reg 
params for that at present)?

On 28/01/16 19:27, Mike Jones wrote:

The OAuth Discovery specification has been updated to add metadata values for 
revocation<http://tools.ietf.org/html/rfc7009><http://tools.ietf.org/html/rfc7009>,
 
introspection<http://tools.ietf.org/html/rfc7662><http://tools.ietf.org/html/rfc7662>,
 and 
PKCE<http://tools.ietf.org/html/rfc7636><http://tools.ietf.org/html/rfc7636>.  
Changes were:



*       Added "revocation_endpoint_auth_methods_supported" and 
"revocation_endpoint_auth_signing_alg_values_supported" for the revocation 
endpoint.



*       Added "introspection_endpoint_auth_methods_supported" and 
"introspection_endpoint_auth_signing_alg_values_supported" for the 
introspection endpoint.



*       Added "code_challenge_methods_supported" for PKCE.



The specification is available at:



*       http://tools.ietf.org/html/draft-jones-oauth-discovery-01



An HTML-formatted version is also available at:



*       http://self-issued.info/docs/draft-jones-oauth-discovery-01.html



                                                          -- Mike



P.S.  This note was also published at http://self-issued.info/?p=1531 and as 
@selfissued<https://twitter.com/selfissued><https://twitter.com/selfissued>.







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Vladimir Dzhuvinov
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