OmniAuth Microsoft Live Strategy

Microsoft (Windows) Live OAuth2 Strategy for OmniAuth. Supports hybrid(client-side) and server-side flows.

Installation

Add to your Gemfile:

gem "omniauth-microsoft-live", :github => "9peso/omniauth-microsoft-live"

Then run bundle install.

Obtaining application key and secret

Go to 'https://account.live.com/developers/applications/'
Select (or create) your project.
Follow 'Edit Settings'
Follow 'App Settings'

Usage

If You are not using Devise then you can add provider as middleware. An example for adding the middleware to a Rails app in config/initializers/omniauth.rb is below:

Rails.application.config.middleware.use OmniAuth::Builder do
  provider :microsoft_live, ENV["LIVE_KEY"], ENV["LIVE_CLIENT_SECRET"]
end

You can now access the OmniAuth Microsoft Live OAuth2 URL: /auth/microsoft_live

Auth Hash

An example of an authentication hash available in the callback by accessing request.env["omniauth.auth"]:

{
  "provider" => "microsoft_live",
  "uid" => "123459789uid",
  "info" =>  {
    "id" => "123459789uid",
    "email" => "mail@example.com",
    "emails" =>  [
      { "type" => "preferred", "value" => "mail@example.com"     },
      { "type" => "account",   "value" => "mail@example.com"     },
      { "type" => "personal",  "value" => nil                    },
      { "type" => "business",  "value" => "business@example.com" },
      { "type" => "other",     "value" => nil                    }
    ],
    "name" => "John Doe",
    "first_name" => "John",
    "last_name" => "Doe",
    "gender" => nil,
    "link" => "https://profile.live.com/",
    "locale" => "en_US",
    "updated_time" => "2015-02-24T07:00:00+0000"
  },
  "credentials" =>  {
    "token" => "token",
    "expires_at" => 1424005505,
    "expires" => true
  },
  "extra"  =>  {
    "raw_info" =>  {
      "id" => "123459789uid",
      "name" => "John Doe",
      "first_name" => "John",
      "last_name" => "Doe",
      "link" => "https://profile.live.com/",
      "gender" => nil,
      "emails" =>  {
        "preferred" => "mail@example.com",
        "account"   => "mail@example.com",
        "personal"  => nil,
        "business"  => "business@example.com"
      },
      "locale" => "en_US",
      "updated_time" => "2015-02-24T07:00:00+0000"
    },
    "authentication_token" => "auth_token"
  }
}

Server-side flow (Devise)

Define your application id and secret in "config/initializers/devise.rb"

config.omniauth :microsoft_live, "APP_ID", "APP_SECRET", { }

Add omniauth callbacks controller option to devise line in 'config/routes.rb' for the callback routes to be defined.

devise_for :users, :controllers => { :omniauth_callbacks => "omniauth_callbacks" }

Make your model omniauthable. Generally the model resides in "/app/models/user.rb"

devise :omniauthable, :omniauth_providers => [:microsoft_live]

Setup your callbacks controller.

class OmniauthCallbacksController < Devise::OmniauthCallbacksController
  def microsoft_live
    # You need to implement the method below in your model (e.g. app/models/user.rb)

    auth_attributes = request.env["omniauth.auth"]
    @user = User.find_for_omniauth(auth_attributes['provider'], auth_attributes['uid'])

    ...
  end
end

and bind to or create the user

def self.find_for_omniauth(provider, uid)
  user = User.where(:provider => provider, :uid => uid).first
end

For your views you can login using:

<%= link_to "Sign in with Live",
  user_omniauth_authorize_path(:microsoft_live) %>

An overview is available at https://github.com/plataformatec/devise/wiki/OmniAuth:-Overview

One-time code flow (Hybrid Authentication) (and Devise)

This flow is described by microsoft here. Hybrid authentication flow has significant functional and security advantages over a pure server-side or pure client-side flow. The following steps occur in this flow:

The client (web browser) authenticates the user directly via WL JS SDK. During this process assorted modals may be rendered by WL.
On successful authentication, WL server returns a one-time use code, which requires the client secret (which is only available server-side).
WL redirects user to the callback page with code in parameters.
The gem validates the code using a server-side request to WL servers. If the code is valid then an access token will be returned. The gem then forms a cookie needed for WL JS SDK and sets in into env.
Callback controller sets the cookie from env.
WL SDK validates the cookie and closes the popup.
Login success callback function is called.

This flow is immune to replay attacks, and conveys no useful information to a man in the middle.

For this flow to be functional you need to setup appropriate javascript and change the callback controller code. The examples are provided below.

jQuery(function() {
  return $.ajax({
    url: '//js.live.net/v5.0/wl.js',
    dataType: 'script',
    cache: true
  });
});

window.wlAsyncInit = function() {
  WL.init({
    client_id: 'YOUR_MS_KEY',
    redirect_uri: 'YOUR_SERVER/users/auth/microsoft_live/callback',
    scope: ['wl.emails', 'wl.basic'],
    response_type: 'code',
  });

  var onLoginSuccess = function(data) {
    ...
  },

  onLoginFailure = function() {
    ...
  };

  $('.microsoft_live').click(function(e) {
    e.preventDefault();
    WL.login().then(onLoginSuccess, onLoginFailure);
  });
};

IMPORTANT: When using hybrid auth redirect page must include WL JS SDK. This is a Microsoft requirement of such flow.

class OmniauthCallbacksController < Devise::OmniauthCallbacksController
  def microsoft_live
    # You need to implement the method below in your model (e.g. app/models/user.rb)

    auth_attributes = request.env["omniauth.auth"]
    @user = User.find_for_omniauth(auth_attributes['provider'], auth_attributes['uid'])

    #set unencoded cookie for WL.js
    response['set-cookie'] = "wl_auth=#{request.env.delete('wl_auth')}; domain=#{request.host}; path=/"
    ...

    redirect_to page_with_wl_js_path
  end
end

olefav / omniauth-microsoft-live