I'm not sure we'd like to have a Docker registry specific protocol added directly to Keycloak. Seems like Docker registry should rather get their act together and comply with existing protocols rather than invent their own.

We did have an idea of creating some repository for extensions. These would be community maintained, not included in product and wouldn't receive the same level of testing. Maybe that would be a good place for this. With Bills recent deployer work it could be easier to allow users to deploy custom extensions as well.

On 15 August 2016 at 16:41, Josh Cain <josh.cain@redhat.com> wrote:
Hi Stian,

Docker's auth V2 (docs link above) is Oauth-ish, but doesn't seem to conform 100% to the specification.  I started by just trying to stand up an OIDC endpoint to talk to docker and Keycloak threw a "Missing parameters: response_type" error.  Turns out, Docker sends the GET request like this:


Not only is the request missing the request_typer paremeter, but Docker uses different nomenclature than the OAuth/OIDC standard.  For instance, I would expect the 'service' param to appear as the client_id param to conform to the OAuth spec.

Since it uses different nomenclature, I thought it would be a much cleaner implementation to just implement it as its own protocol.  Didn't want to muddy up a clean OIDC/OAuth implemention.

Are there workarounds to deal with these differences that I'm missing?

Josh Cain | Software Applications Engineer
Identity and Access Management
Red Hat
+1 843-737-1735

On Mon, Aug 15, 2016 at 5:56 AM, Stian Thorgersen <sthorger@redhat.com> wrote:
I'm not sure I fully understand. Are you using a Docker client to authenticate with Keycloak? That works with the standard OIDC flows, but it requires some additional claims in the token which you are adding with a protocol mapper?

On 12 August 2016 at 15:31, Josh Cain <josh.cain@redhat.com> wrote:
Hi All,

We want to use Keycloak as the IDP/Token issuer for authentication with a docker registry as per the specification found here:


I've implemented a Protocol Mapper in Keycloak that successfully uses the IDP to perform a login against a registry/docker client.  Is this something that the team is interested in building into the product?  If so, I'd be happy to push back upstream.

Josh Cain | Software Applications Engineer
Identity and Access Management
Red Hat
+1 843-737-1735

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