wai-middleware-auth

Middleware that secures WAI application

Installation

$ stack install wai-middleware-auth

OR

$ cabal install wai-middleware-auth

wai-auth

Along with middleware this package ships with an executable wai-auth, which can function as a protected file server or a reverse proxy. Right from the box it supports OAuth2 authentication as well as it's custom implementations for Google and Github.

Configuration is done using a yaml config file. Here is a sample file that will configure wai-auth to run a file server with Google, GitHub, and GitLab authentication on http://localhost:3000:

app_root: "_env:APPROOT:http://localhost:3000"
app_port: 3000
cookie_age: 3600
secret_key: "...+vwscbKR4DyPT"
file_server:
  root_folder: "/path/to/html/files"
  redirect_to_index: true
  add_trailing_slash: true
providers:
  github:
    client_id: "...94cc"
    client_secret: "...166f"
    app_name: "Dev App for wai-middleware-auth"
    email_white_list:
      - "^[a-zA-Z0-9._%+-]+@example.com$"
  google:
    client_id: "...qlj.apps.googleusercontent.com"
    client_secret: "...oxW"
    email_white_list:
      - "^[a-zA-Z0-9._%+-]+@example.com$"
  gitlab:
    client_id: "...9cfc"
    client_secret: "...f0d0"
    app_name: "Dev App for wai-middleware-auth"
    email_white_list:
      - "^[a-zA-Z0-9._%+-]+@example.com$"

Above configuration will also block access to users that don't have an email with example.com domain. There is also a secret_key field which will be used to encrypt the session cookie. In order to generate a new random key run this command:

$ echo $(wai-auth key --base64)
azuCFq0zEBkLSXhQrhliZzZD8Kblo...

Make sure you have proper callback/redirect urls registered with google/github/gitlab apps, eg: http://localhost:3000/_auth_middleware/google/complete.

After configuration file is ready, running application is very easy:

$ wai-auth --config-file=/path/to/config.yaml
Listening on port 3000

Reverse proxy

To use a reverse proxy instead of a file server, replace file_server with reverse_proxy, eg:

reverse_proxy:
  host: myapp.example.com
  port: 80
  secure: false

Self-hosted GitLab

The GitLab provider also supports using a self-hosted GitLab instance by setting the gitlab_host field. In this case you may also want to override the provider_info to change the title, logo, and description. For example:

providers:
  gitlab:
    gitlab_host: gitlab.mycompany.com
    client_id: "...9cfc"
    client_secret: "...f0d0"
    app_name: "Dev App for wai-middleware-auth"
    email_white_list:
      - "^[a-zA-Z0-9._%+-]+@mycompany.com$"
    provider_info:
      title: My Company's GitLab
      logo_url: https://mycompany.com/logo.png
      descr: Use your My Company GitLab account to access this page.