Identity Provider that requires PKCS

[derjan]

I'm trying to integrate an external identity provider that requires the Authorization Code Grand and a PKCE challenge method with S256.

I added the identity provider to FusionAuth, and the login window correctly shows the "Login with <my provider>" button, but I only get an "code challenge required" error back from this identity provider once I click the button.

Inspecting the call made to the identity provider I can see that the client_id, redirect_url, response_type and scope query parameters are correctly set, but code_challenge and code_challenge_method are missing (those are required according to the identity provider's documentation).

Is there a way to enable PKCS for identity providers in FusionAuth?

[dan]

What is the external identity provider (if you can share)?

Most identity providers I know of use the nonce which is part of OIDC, rather than PKCE.

Which identity provider are you trying to configure within FusionAuth (OIDC, external JWT)?

[derjan]

@dan Thank you for the quick reply.

The identity provider is a client's instance of https://www.miniorange.com, and I'm trying to add it in Settings -> Identity Providers -> Add provider -> OpenID Connect.

[dan]

Hiya,

I looked around and we don't support PKCE for identity providers.

Can you please open a github issue for this feature: https://github.com/fusionauth/fusionauth-issues/issues

You can reference this forum post if you'd like.

The only workaround I can think of is to try to turn off the PKCE requirement for miniorange. I don't have access to that IDP so I can't give guidance on how to do so, but if you figure it out, please share :).

Thanks,
Dan

[derjan]

@dan I'll go back to the client and see if PKCE can be disabled, but I'm not getting my hopes up…

For reference, the GitHub issue can be found here: https://github.com/FusionAuth/fusionauth-issues/issues/968