Üeberauth Identity

A simple username/password strategy for Überauth.

Installation

1. Add :ueberauth_identity to your list of dependencies in mix.exs:

   def deps do
     [
       {:ueberauth_identity, "~> 0.3"}
     ]
   end

2. Add the strategy to your applications:

   def application do
     [
       applications: [:ueberauth_identity]
     ]
   end

3. Add Identity to your Überauth configuration:

   config :ueberauth, Ueberauth,
     providers: [
       identity: {Ueberauth.Strategy.Identity, [
         callback_methods: ["POST"]
       ]}
     ]

4. Include the Überauth plug in your controller:

   defmodule MyApp.AuthController do
     use MyApp.Web, :controller
     plug Ueberauth
     ...
   end

5. Create the request and callback routes if you haven't already:

   scope "/auth", MyApp do
     pipe_through :browser
     get "/:provider", AuthController, :request
     get "/:provider/callback", AuthController, :callback
     post "/identity/callback", AuthController, :identity_callback
   end

6. Your request phase handler should implement a form or similar method to collect the required login information.

7. The controller callback should validate login information using the Ueberauth.Auth struct:

   def identity_callback(%{assigns: %{ueberauth_auth: auth}} = conn, params) do
     case validate_password(auth.credentials) do
       :ok ->
         user = %{id: auth.uid, name: name_from_auth(auth), avatar: auth.info.image}
         conn
         |> put_flash(:info, "Successfully authenticated.")
         |> put_session(:current_user, user)
         |> redirect(to: "/")
       { :error, reason } ->
         conn
         |> put_flash(:error, reason)
         |> redirect(to: "/")
     end
   end

For an example implementation see the Überauth Example application.

Nested form attributes

Sometimes it's convenient to nest the returned params under a namespace. For example if you're using a "user" form, your params may come back as:

%{ "user" => { "email" => "my@email.com" … }

If you're using a nested set of attributes like this you'll need to let Überauth Identity know about it. To do this set an option in your config:

config :ueberauth, Ueberauth,
  providers: [
    identity: {Ueberauth.Strategy.Identity, [param_nesting: "user"]}
  ]

Params scrubbing

By default Überauth Identity will be changing empty values from the returned params to nil. If you want to disable that behaviour set the following option in your config:

config :ueberauth, Ueberauth,
  providers: [
    identity: {Ueberauth.Strategy.Identity, [scrub_params: false]}
  ]

Calling

Depending on the configured url you can initial the request through:

/auth/identity/callback

Copyright and License

Copyright (c) 2015 Daniel Neighman

Released under the MIT License, which can be found in the repository in LICENSE.