This project implements a basic authentication service to be used with Envoy Proxy's external authorization HTTP filter. The service is written in Go and uses HTTP. It checks the Authorization header of incoming requests and validates it against a single set of credentials provided via environment variables.

• Go 1.22
• Docker

The service requires the following environment variables to be set:

• AUTH_USERNAME: The username for authentication.
• AUTH_PASSWORD: The password for authentication.

To build the Docker image, run:

make docker-build

To run the container with the required environment variables, use:

docker run -e AUTH_USERNAME=testuser -e AUTH_PASSWORD=testpassword -p 9001:9001 grpc-basic-auth

Replace testuser and testpassword with your desired credentials.

To test the service without an Authorization header, run:

• main.go: Entry point for the application.
• pkg/auth/v3/auth.go: Contains the logic for handling authorization requests.

• Envoy Proxy Go control plane: github.com/envoyproxy/go-control-plane
• gRPC: google.golang.org/grpc
• Protocol buffers and wrappers: github.com/golang/protobuf, google.golang.org/genproto/googleapis/rpc