Lightweight GO server acting as a "forward-auth" middleware (in Traefik for instance).

Inspired by sohamkamani's tuto many thanks to him.

Use at your own risk, not yet secured. Feel free to PR/Issue if you detect security issues :)

• / for html rendering and forward-auth url
  • return 401 and a "Login page" if no valid JWT and invalid credentials supplied
  • return 300 if no valid JWT and valid credentials supplied (means you logged-in succesfully)
  • return 300 and extend JWT if valid JWT near expiration date
  • return 200 and a "Welcome page" if valid JWT
• /logout to logout
  • return 302 (means you logged-out succesfully)

To log-in, credentials are supplied via Header "Auth-Form" (POST is not forwarded to middlewares by Traefik) GFA check if the website is allowed for the user (cf. configuration file and Aud. in JWT)

• jwt instead of cookie and session
• password saved as hash using bcrypt
• ssl with selfsigned cert
• choose config file from flag
• automatic image push on docker hub (quentinb69/go-forward-auth)
• pass header value such as username when valid JWT
• automatic test
• automatic lint (gofmt, etc...)
• use CSRF ? (not sure if needed)
• help tool for bcrypt
• real documentation
• reacto for cleaner code

The following screenshot shows the default login page.

Available as a docker image : quentinb69/go-forward-auth

• Google Cloud Shell
• Github.dev

The source code and binaries of GFA are subject to the MIT License.