OmniAuth Cognito OAuth2 Strategy

OmniAuth Strategy to authenticate with Cognito via OAuth2 using authorization code grant.

Installation

Install the gem and add to the application's Gemfile by executing:

bundle add omniauth-cognito

If bundler is not being used to manage dependencies, install the gem by executing:

gem install omniauth-cognito

Usage

Devise

Add the following to config/initializers/devise.rb:

config.omniauth :cognito,
  ENV['COGNITO_CLIENT_ID'],
  ENV['COGNITO_CLIENT_SECRET'],
  scope: 'openid email profile phone aws.cognito.signin.user.admin',
  client_options: {
    site: ENV['COGNITO_DOMAIN']
  }

OmniAuth

Add the following to config/initializers/omniauth.rb:

Rails.application.config.middleware.use OmniAuth::Builder do
  provider :cognito,
    ENV['COGNITO_CLIENT_ID'],
    ENV['COGNITO_CLIENT_SECRET'],
    scope: 'openid email profile phone aws.cognito.signin.user.admin',
    client_options: {
      site: ENV['COGNITO_DOMAIN']
    }
end

Note: For app without client secret (e.g. SPA), use nil in place of ENV['COGNITO_CLIENT_SECRET']

Then add the following to config/routes.rb so the callback routes are defined.

devise_for :users, controllers: { omniauth_callbacks: 'users/omniauth_callbacks' }

Make sure your model is omniauthable. Generally this is app/models/user.rb

devise :omniauthable, omniauth_providers: [:cognito]

Auth Hash

Here's an example of auth hash you available in the callback, which can be accessed as request.env['omniauth.auth']:

{
  "provider": "cognito",
  "uid": "1cb40fcd-756d-4388-beb3-ab241e8ede84",
  "info": {
    "name": "Dinesh Budhayer",
    "email": "[email protected]",
    "first_name": "Dinesh",
    "last_name": "Budhayer",
    "preferred_username": null,
    "phone_number": null,
    "phone_number_verified": null,
    "email_verified": "true"
  },
  "credentials": {
    "token": "ACCESS_TOKEN",
    "refresh_token": "REFRESH_TOKEN",
    "expires_at": 1700586000,
    "expires": true
  },
  "extra": {}
}

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and the created tag, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/ayerdines/omniauth-cognito. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.

License

The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the Omniauth::Cognito project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.