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Subject: Re: [xacml] OAuth tokens and XACML?

Hi David,

I agree, that is a possible strategy.

Where it becomes tricky, I think, is that if there is a multitude of different
XACML PDP's that could be called, then each PDP would need to configure
an appropriate PIP, along w an appropriate call-out mechanism.

In practice, this might be ok, if the XACML PDP's can generally assumed to be
from a small set of vendors, where each has provided well-defined mechanisms
for implementing/deploying such a PIP.


On 11/6/2018 11:07 PM, David Brossard wrote:

The token could be parsed by the PEP as suggested in the thread or passed verbatim to the PDP where a PIP could decode it and extract whatever attributes the policy may need. That's what Axiomatics Policy Server does. Note that it's not a PDP's responsibility to validate any token.

In federated scenarios, it's quite common to have the PEP pass identity tokens to the PDP. We have customers who do that (SAML and OAuth).


On Mon, Nov 5, 2018, 9:11 AM rich levinson <rich.levinson@oracle.com wrote:
Hi Mohammad,

Thanks for the reply. I was thinking that was probably the answer, but wanted to get confirmation.
I agree, the PEP probably knows what to do w the token, and if it wants to send info from the token
to the PDP, then it needs a vocabulary of AttributeId's in order for a Policy to recognize and process
the attribute.

ÂÂ Thanks,
ÂÂ Rich

On 11/5/2018 1:33 PM, Mohammad Jafari wrote:
> Although I am not aware of an implementation that supports this, this seems to be a PEP-specific issue. If the PEP can consume an OAuth/OpenID Connect token (which might require doing OAuth Introspection as well) and turn the content into attributes in an XACML request, the rest of the flow should be orthogonal to where these attributes originate from.
> Regards,
> Mohammad
> ïOn 2018-11-05, 10:24 AM, "xacml@lists.oasis-open.org on behalf of rich levinson" <xacml@lists.oasis-open.org on behalf of rich.levinson@oracle.com> wrote:
>Â Â Â Is there any way an OAuth Access Token or Identity Token can be passed
>Â Â Â in a XACML Request, and have its contents used in a Policy?
>Â Â Â
>Â Â Â (I think the answer is no, but checking just in case)
>Â Â Â
>Â Â Â Â ÂThanks,
>Â Â Â Â ÂRich
>Â Â Â
>Â Â Â
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