On 02/08/2013 12:51 AM, Prabath Siriwardena wrote:
Hi Justin,
I have couple of questions related to "valid" parameter...
This endpoint can be invoked by the Resource Server in runtime...
That's correct.
In that case what is exactly meant by the "resource_id" in request ?
The resource_id field is a service-specific string that basically lets
the resource server provide some context to the request to the auth
server. There have been some other suggestions like client IP address,
but I wanted to put this one in because it seemed to be a common theme.
The client is trying to do *something* with the token, after all, and
the rights, permissions, and metadata associated with the token could
change based on that. Since the Introspection endpoint is all about
getting that metadata back to the PR, this seemed like a good idea.
IMO a token to be valid depends on set of criteria based on it's type..
For a Bearer token..
1. Token should not be expired
2. Token should not be revoked.
3. The scope the token issued should match with the scope required for
the resource.
For a MAC token...
1. Token not expired (mac id)
2. Token should not be revoked
3. The scope the token issued should match with the scope required for
the resource.
4. HMAC check should be valid
There are similar conditions for SAML bearer too..
This isn't really true. The SAML bearer token is fully self-contained
and doesn't change based on other parameters in the message, unlike MAC.
Same with JWT. When it hands a SAML or JWT token to the AS, the PR has
given *everything* the server needs to check that token's validity and use.
MAC signatures change with every message, and they're done across
several components of the HTTP message. Therefor, the HMAC check for MAC
style tokens will still need to be done by the protected resource.
Introspection would help in the case that the signature validated just
fine, but the token might have expired. Or you need to know what scopes
apply. Introspection isn't to fully validate the call to the protected
resource -- if that were the case, the PR would have to send some kind
of encapsulated version of the original request. Otherwise, the AS won't
have all of the information it needs to check the MAC.
I think what you're describing is ultimately *not* what the
introspection endpoint is intended to do. If that's unclear from the
document, can you please suggest text that would help clear the use case
up? I wouldn't want it to be ambiguous.
-- Justin
Thanks & regards,
-Prabath
On Thu, Feb 7, 2013 at 10:30 PM, Justin Richer <jric...@mitre.org
<mailto:jric...@mitre.org>> wrote:
It validates the token, which would be either the token itself in
the case of Bearer or the token "id" part of something more
complex like MAC. It doesn't directly validate the usage of the
token, that's still up to the PR to do that.
I nearly added a "token type" field in this draft, but held back
because there are several kinds of "token type" that people talk
about in OAuth. First, there's "Bearer" vs. "MAC" vs. "HOK", or
what have you. Then within Bearer you have "JWT" or "SAML" or
"unstructured blob". Then you've also got "access" vs. "refresh"
and other flavors of token, like the id_token in OpenID Connect.
Thing is, the server running the introspection endpoint will
probably know *all* of these. But should it tell the client? If
so, which of the three, and what names should the fields be?
-- Justin
On 02/07/2013 11:26 AM, Prabath Siriwardena wrote:
Okay.. I was thinking this could be used as a way to validate the
token as well. BTW even in this case shouldn't communicate the
type of token to AS? For example in the case of SAML profile - it
could be SAML token..
Thanks & regards,
-Prabath
On Thu, Feb 7, 2013 at 8:39 PM, Justin Richer <jric...@mitre.org
<mailto:jric...@mitre.org>> wrote:
"valid" might not be the best term, but it's meant to be a
field where the server says "yes this token is still good" or
"no this token isn't good anymore". We could instead do this
with HTTP codes or something but I went with a pure JSON
response.
-- Justin
On 02/06/2013 10:47 PM, Prabath Siriwardena wrote:
Hi Justin,
I believe this is addressing one of the key missing part in
OAuth 2.0...
One question - I guess this was discussed already...
In the spec - in the introspection response it has the
attribute "valid" - this is basically the validity of the
token provided in the request.
Validation criteria depends on the token and well as token
type ( Bearer, MAC..).
In the spec it seems like it's coupled with Bearer token
type... But I guess, by adding "token_type" to the request
we can remove this dependency.
WDYT..?
Thanks & regards,
-Prabath
On Thu, Feb 7, 2013 at 12:54 AM, Justin Richer
<jric...@mitre.org <mailto:jric...@mitre.org>> wrote:
Updated introspection draft based on recent comments.
Changes include:
- "scope" return parameter now follows RFC6749 format
instead of JSON array
- "subject" -> "sub", and "audience" -> "aud", to be
parallel with JWT claims
- clarified what happens if the authentication is bad
-- Justin
-------- Original Message --------
Subject: New Version Notification for
draft-richer-oauth-introspection-02.txt
Date: Wed, 6 Feb 2013 11:24:20 -0800
From: <internet-dra...@ietf.org>
<mailto:internet-dra...@ietf.org>
To: <jric...@mitre.org> <mailto:jric...@mitre.org>
A new version of I-D, draft-richer-oauth-introspection-02.txt
has been successfully submitted by Justin Richer and posted to the
IETF repository.
Filename: draft-richer-oauth-introspection
Revision: 02
Title: OAuth Token Introspection
Creation date: 2013-02-06
WG ID: Individual Submission
Number of pages: 6
URL:http://www.ietf.org/internet-drafts/draft-richer-oauth-introspection-02.txt
Status:http://datatracker.ietf.org/doc/draft-richer-oauth-introspection
Htmlized:http://tools.ietf.org/html/draft-richer-oauth-introspection-02
Diff:http://www.ietf.org/rfcdiff?url2=draft-richer-oauth-introspection-02
Abstract:
This specification defines a method for a client or protected
resource to query an OAuth authorization server to determine
meta-
information about an OAuth token.
The IETF Secretariat
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--
Thanks & Regards,
Prabath
Mobile : +94 71 809 6732 <tel:%2B94%2071%20809%206732>
http://blog.facilelogin.com
http://RampartFAQ.com
--
Thanks & Regards,
Prabath
Mobile : +94 71 809 6732 <tel:%2B94%2071%20809%206732>
http://blog.facilelogin.com
http://RampartFAQ.com
--
Thanks & Regards,
Prabath
Mobile : +94 71 809 6732
http://blog.facilelogin.com
http://RampartFAQ.com
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