401 Jwt issuer is not configured

[Wenzhe Gao]

Hi,

I'm getting 401 "Jwt issuer is not configured" when trying to set up Endpoints with custom JWK authentication for a gRPC backend deployed on Cloud Run. Authentication via service accounts and google ID tokens do work.

Custom authentication is working for a different ESPv2 endpoints gateway with Cloud Functions backends. We're trying to using the same jwks_uri and setting the same claims, but removing the "x-google-" prefixes to jwks_uri, issuer, audiences in the endpoints configuration for gRPC.

Any ideas on how to make custom authentication work for Cloud Endpoints with gRPC backend? Thanks

[Wayne Zhang]

You need to configure jwt auth in this config proto

There is a short cut for you.  Since you have an openapi spec for Cloud Function working.  You can get its config by "gcloud endpoints configs describe CONFIG_ID --service=SERVICE".  

You can copy its Authentication rules to your gRPC endpoint configuration.

Thanks

-Wayne

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