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Basic Auth Service with Envoy Proxy External Authorization

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.

Prerequisites

  • Go 1.22
  • Docker

Environment Variables

The service requires the following environment variables to be set:

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

Building and Running the Service

Build the Docker Image

To build the Docker image, run:

make docker-build

Run the Container

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.

Testing the Service

Without Authorization Header

To test the service without an Authorization header, run:



Code Structure


    

  • main.go: Entry point for the application.
    • 

  • pkg/auth/v3/auth.go: Contains the logic for handling authorization requests.
    • 



Dependencies


    

  • 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
    •