Thanks James,
I wanted to provide feedback on your comments.
You wrote "token_type should be an HTTP authentication scheme name". I
disagree with this. The token_type is intended be used to identify the type of
the token, meaning that it is likely to take on values like:
SWT
JWT
urn:oasis:names:tc:SAML:1.0:assertion
urn:oasis:names:tc:SAML:2.0:assertion
http://service.example.com/oauth/custom_token_format
You wrote "the bearer spec (draft-ietf-oauth-v2-bearer) must not use the
'OAuth2' scheme name. It needs its own scheme name, eg 'BEARER'". I also
disagree with this. For the same reason that it was appropriate for draft 11
to use the scheme name "OAuth", it is appropriate for the bearer token spec to
use the scheme name "OAuth2" for the corresponding text. In the interest of
completing the specification, I'm not prone to introduce a breaking change by
modifying the scheme name at this time.
Working group feedback is welcome.
-- Mike
-----Original Message-----
From: oauth-boun...@ietf.org [mailto:oauth-boun...@ietf.org] On Behalf Of
Manger, James H
Sent: Thursday, December 02, 2010 3:42 PM
To: oauth@ietf.org
Subject: Re: [OAUTH-WG] OAuth 2.0 Bearer Token specification draft -01
token_type should be an HTTP authentication scheme name (eg "BASIC" or "BEARER"
or "MAC"...).
The core spec (draft-ietf-oauth-v2) should explicitly state this rule.
>From the token_type, the client app knows which auth scheme to use.
[renaming the parameter from "token_type" to "scheme" would help.]
Defining token_type to be an HTTP authentication scheme name effectively
defines how OAuth2 can deliver credentials for auth schemes that are
independent of OAuth2, eg schemes specified before OAuth2 existed. It
eliminates the need for additional specs just to provide a link from OAuth2 to
every authentication mechanism.
Some auth mechanisms for which OAuth2 could deliver credentials are not
actually HTTP authentication schemes. Eg OAuth2 delivering an id/secret to use
in TLS-PSK (pre-shared key). For that you will need a small additional spec to
define a token_type value -- ie define a pseudo-HTTP-auth-scheme-name.
P.S. Related to this, the bearer spec (draft-ietf-oauth-v2-bearer) must not use
the "OAuth2" scheme name. It needs its own scheme name, eg "BEARER".
--
James Manger
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