Hi Manikumar!

On Mon, Aug 23, 2021, at 12:59 PM, Manikumar wrote:
> Hi Kirk,
> 
> Thanks for the KIP!
> 
> 1. Do we want to support validating issuers using the issuer uri?

Are you referring to validating the JWT was issued by a known, configured 
issuer, or something more different/more dynamic?

The current design allows for optionally requiring that the iss claim from the 
JWT match a statically configured issuer from the configuration. See 
expectedIssuer under the broker configuration.

> 2. Can the access token be reused for multiple connections from the same
> client?

That's an excellent question - I will double-check that it is reused. Hopefully 
the existing client authentication mechanism supports that level of reuse.

> 3. Do we support configuring separate ssl configs for connecting
> authorization server/jwks endpoint?

Yes, that documentation is forthcoming soon.

It will be a set of configuration options similar to the existing SSL socket 
configuration, but specific to the HTTPS endpoint for the OAuth/OIDC provider 
connections.

> 4. Do we want support any readable username as principal if it is present
> in the token claims

Yes. See the subClaimName and principalClaimName configuration options. Those 
will allow specifying a claim name other than sub for the principal.

Now that I'm writing this out I realize that the configuration names are 
different on the client and broker for some reason 🤔  I'll change that.

> 5. I agree with Ron, We should move the public classes to
> "o.a.k.c.s.oauthbearer.secured" package.

Sounds good. I made the change in the KIP.

> Thanks,
> Manikumar

Thanks for your feedback!

> 
> On Thu, Aug 19, 2021 at 11:46 PM Kirk True <k...@mustardgrain.com> wrote:
> 
> > Hi Ron,
> >
> > On Sat, Aug 14, 2021, at 11:27 AM, Ron Dagostino wrote:
> > > Hi Kirk -- thanks for the KIP!  Having concrete implementations
> > > out-of-the-box will be very helpful.
> > >
> > > > As seen in this diagram, the login callback is executed on the client
> > and
> > > the validate callback is executed on the broker.
> > >
> > > There was no diagram when I looked.  Maybe there is a broken link or
> > > something?
> >
> > I double-checked and it's showing for me on the published version of the
> > wiki, even after I've logged out.
> >
> > Would you mind checking again when you get the chance?
> >
> > > > The name of the implementation class will be
> > >
> > org.apache.kafka.common.security.oauthbearer.internals.secured.OAuthBearerLoginCallbackHandler
> > >
> > > I think the internals package was meant for non-public stuff  Most of it
> > > seems that way, although the "unsecured" implementation is in there --
> > but
> > > that's maybe a grey area since it isn't meant to be used in production
> > > scenarios and is mostly leveraged in unit tests.  Perhaps move the
> > proposed
> > > class into a "o.a.k.c.s.oauthbearer.secured" package?  Then any
> > > implementation details beyond the public stuff can live under the
> > > "...internals.secured" package that you mentioned?  The same comment
> > > applies to the validator callback handler class.
> >
> > In a draft I had the secured package directly under the oauthbearer
> > package as you describe but I received some out-of-band feedback to aim for
> > parity with the unsecured package layout.
> >
> > I don't have a preference for either. I do agree that it seems weird for a
> > package named internals to be used in configuration since its name implies
> > that things could change.
> >
> > > I'm confused by loginRetryMaxWaitMs and loginRetryWaitMs.  The former has
> > > "Max" in the name, but only the description of the latter mentions it
> > being
> > > a max amount of time?  Are the descriptions incorrect or perhaps
> > reversed?
> >
> > Yes. Thanks for catching that. I've added more description in a separate
> > paragraph above the enumerated configurations.
> >
> > > >  Ensure the encoding algorithm isn't none and matches what the expected
> > > algorithm expecting
> > >
> > > "expected algorithm expecting" some kind of grammar issue?
> >
> > Haha! Yes - thanks for catching that too!
> >
> > It now reads:
> >
> > > Ensure the encoding algorithm (`alg` from the header) isn't `none` and
> > matches the expected algorithm for the JWK ID
> >
> > > Thanks again -- very exciting!
> >
> > Thanks for the feedback!!!
> >
> > Kirk
> >
> > >
> > > Ron
> > >
> > >
> > >
> > >
> > >
> > > On Fri, Aug 13, 2021 at 3:53 PM Kirk True <k...@mustardgrain.com> wrote:
> > >
> > > > Hi all!
> > > >
> > > > I have created a new KIP for a new OAuth/OIDC related authentication
> > > > feature.
> > > >
> > > > This task is to provide a concrete implementation of the interfaces
> > > > defined in KIP-255 to allow Kafka to connect to an OAuth / OIDC
> > identity
> > > > provider for authentication and token retrieval. While KIP-255
> > provides an
> > > > unsecured JWT example for development purposes, this will fill in the
> > gap
> > > > and provide a production-grade implementation.
> > > >
> > > > Here's the KIP:
> > > >
> > > >
> > > >
> > https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=186877575
> > > >
> > > > Thanks!
> > > > Kirk
> > >
> >
> 

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