Brian,
The current text is:
actor_token OPTIONAL. A security token that represents the identity of
the party that is authorized to use the requested security token and act
on behalf of the subject.
This sentence is indeed wrong since an actor-token is not a security token.
So your proposed change does not solve this issue: actor_token
OPTIONAL. A security token that represents the identity of the acting
party.
The current text states:
Typically, in the request, the subject_token represents the identity
of the party on behalf of whom
the token is being requested while the actor_token represents the
identity of the party to whom the access
rights of the issued token are being delegated.
Logically, the definition should be along the following lines:
actor_token OPTIONAL. Indicates the identity of the party to whom the
access rights of the issued token are being delegated.
If there is no delegation, then this field (which is optional) will not
be used.
Anyway, thank you for requesting the change, otherwise this would have
been a left error.
Denis
I do have one minor issue I'd like to raise that relates to some
conversations I've been a party to recently about implementations and
applications of token exchange.
I think that the current text in §2.1 for the "actor_token" is overly
specific towards the delegation scenario. I'd propose the language be
generalized somewhat to allow more versatility in
applications/deployments of the token exchange framework. Here's that
text:
actor_token
OPTIONAL. A security token that represents the identity of the
acting party.
On Mon, May 8, 2017 at 8:01 AM, Rifaat Shekh-Yusef
<rifaat.i...@gmail.com <mailto:rifaat.i...@gmail.com>> wrote:
Hi All,
The last email from Brian addresses the multiple
audiences/resources issue with an error code, and we did not see
any objection to this approach so far.
*Authors,*
Are there any other open issues with this draft?
Do you believe it is ready for WGLC?
Thanks,
Rifaat & Hannes
On Fri, Mar 31, 2017 at 11:03 AM, Brian Campbell
<bcampb...@pingidentity.com <mailto:bcampb...@pingidentity.com>>
wrote:
As mentioned during the Chicago meeting the "invalid_target"
error code that was added in -07 was intended to give the AS a
standard way to reject request with multiple
audiences/resources that it doesn't understand or is unwilling
or unable to process based on policy or whatever criteria . It
was intended as a compromise, of sorts, to allow for the
multiple resources/audiences in the request but provide an
easy out for the AS of saying it can't be supported based on
whatever implementation or security or policy it has.
On Tue, Mar 28, 2017 at 1:32 AM, Nat Sakimura
<sakim...@gmail.com <mailto:sakim...@gmail.com>> wrote:
There are cases where tokens are supposed to be consumed
at multiple places and the `aud` needed to capture them.
That's why `aud` is a multi-valued field.
On Mon, Mar 27, 2017 at 11:35 AM Torsten Lodderstedt
<tors...@lodderstedt.net <mailto:tors...@lodderstedt.net>>
wrote:
May I ask you to explain this reason?
Am 27.03.2017 um 08:48 schrieb Mike Jones
<michael.jo...@microsoft.com
<mailto:michael.jo...@microsoft.com>>:
For the same reason that the “aud” claim is
multi-valued in JWTs, the audience needs to stay
multi-valued in Token Exchange. Ditto for resources.
Thanks,
-- Mike
*From:* OAuth [mailto:oauth-boun...@ietf.org] *On
Behalf Of *Brian Campbell
*Sent:* Monday, March 27, 2017 8:45 AM
*To:* Torsten Lodderstedt <tors...@lodderstedt.net
<mailto:tors...@lodderstedt.net>>
*Cc:* oauth <oauth@ietf.org <mailto:oauth@ietf.org>>
*Subject:* Re: [OAUTH-WG] I-D Action:
draft-ietf-oauth-token-exchange-07.txt
Thanks for the review and question, Torsten.
The desire to support multiple audience/resource
values in the request came up during a review and
discussion among the authors of the document when
preparing the -03 draft. As I recall, it was said
that both Salesforce and Microsoft had use-cases for
it. I incorporated support for it into the draft
acting in the role of editor.
From an individual perspective, I tend to agree with
you that allowing for multiple audiences/resources
adds a lot of complexity that's like not needed in
many (or most) cases. And I would personally be open
to making audience and resource mutual exclusive and
single valued. A question for the WG I suppose.
The "invalid_target" error code that was added in -07
was intended to give the AS a standard way to deal
with the complexity and reject request with multiple
audiences/resources that it doesn't understand or is
unwilling or unable to process. It was intended as a
compromise, of sorts, to allow for the multiples but
provide an easy out of saying it can't be supported
based on whatever implementation or policy of the AS.
On Sun, Mar 26, 2017 at 9:00 AM, Torsten Lodderstedt
<tors...@lodderstedt.net
<mailto:tors...@lodderstedt.net>> wrote:
Hi Brian,
thanks for the clarification around resource,
audience and scope.
Here are my comments on the draft:
In section 2.1 it states: „Multiple "resource"
parameters may be used to indicate
that the issued token is intended to be used
at the multiple
resources listed.“
Can you please explain the rational in more
detail? I don’t understand why there is a need to
ask for access tokens, which are good for
multiple resources at once. This is a request
type more or less exclusively used in server to
server scenarios, right? So the only reason I can
think of is call reduction.
On the other side, this feature increases the
AS's complexity, e.g. its policy may prohibit to
issue tokens for multiple resources in general or
the particular set the client is asking for. How
shall the AS handles such cases?
And it is getting even more complicated given
there could also be multiple audience values and
the client could mix them:
"Multiple "audience" parameters
may be used to indicate that the issued token
is intended to be
used at the multiple audiences listed. The
"audience" and
"resource" parameters may be used together to
indicate multiple
target services with a mix of logical names
and physical
locations.“
And in the end the client may add some scope
values to the „meal“, which brings us to
„Effectively, the requested access rights of the
token are the cartesian product of all the
scopes at all the target
services."
I personally would suggest to drop support for
multiple audience and resource parameters and
make audience and resource mutual exclusive. I
think this is sufficient and much easier to
implement.
kind regards,
Torsten.
Am 11.01.2017 um 20:04 schrieb Brian Campbell
<bcampb...@pingidentity.com
<mailto:bcampb...@pingidentity.com>>:
Draft -07 of "OAuth 2.0 Token Exchange" has
been published. The primary change in -07 is
the addition of a description of the
relationship between audience/resource/scope,
which was a request or comment that came up
during the f2f meeting in Seoul.
Excerpted from the Document History:
-07
o Fixed typo (desecration -> discretion).
o Added an explanation of the
relationship between scope, audience
and resource in the request and added
an "invalid_target" error
code enabling the AS to tell the client
that the requested
audiences/resources were too broad.
---------- Forwarded message ----------
From: <internet-dra...@ietf.org
<mailto:internet-dra...@ietf.org>>
Date: Wed, Jan 11, 2017 at 12:00 PM
Subject: [OAUTH-WG] I-D Action:
draft-ietf-oauth-token-exchange-07.txt
To: i-d-annou...@ietf.org
<mailto:i-d-annou...@ietf.org>
Cc: oauth@ietf.org <mailto:oauth@ietf.org>
A New Internet-Draft is available from the
on-line Internet-Drafts directories.
This draft is a work item of the Web
Authorization Protocol of the IETF.
Title : OAuth 2.0 Token Exchange
Authors : Michael B. Jones
Anthony Nadalin
Brian Campbell
John Bradley
Chuck Mortimore
Filename :
draft-ietf-oauth-token-exchange-07.txt
Pages : 31
Date : 2017-01-11
Abstract:
This specification defines a protocol for
an HTTP- and JSON- based
Security Token Service (STS) by defining
how to request and obtain
security tokens from OAuth 2.0
authorization servers, including
security tokens employing impersonation
and delegation.
The IETF datatracker status page for this
draft is:
https://datatracker.ietf.org/doc/draft-ietf-oauth-token-exchange/
<https://datatracker.ietf.org/doc/draft-ietf-oauth-token-exchange/>
There's also a htmlized version available at:
https://tools.ietf.org/html/draft-ietf-oauth-token-exchange-07
<https://tools.ietf.org/html/draft-ietf-oauth-token-exchange-07>
A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-oauth-token-exchange-07
<https://www.ietf.org/rfcdiff?url2=draft-ietf-oauth-token-exchange-07>
Please note that it may take a couple of
minutes from the time of submission
until the htmlized version and diff are
available at tools.ietf.org
<http://tools.ietf.org/>.
Internet-Drafts are also available by
anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
<ftp://ftp.ietf.org/internet-drafts/>
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