Written by Heath Robinson
Taking a lot of inspiration from devise_cas_authenticatable

devise_dacs_authenticatable is DACS single sign-on support for Devise applications. It acts as a replacement for database_authenticatable. It uses an existing cookie from DACS for authentication.

• Rails 2.3 or greater (works with 3.x versions as well)
• Devise 1.0 or greater

gem install --pre devise_dacs_authenticatable

and in your config/environment.rb (on Rails 2.3):

config.gem 'devise', :version => '~> 1.0.6'
config.gem 'devise_dacs_authenticatable'

or Gemfile (Rails 3.x):

gem 'devise'
gem 'devise_dacs_authenticatable'

Once devise_dacs_authenticatable is installed, add the following to your user model:

devise :dacs_authenticatable

You can also add other modules such as token_authenticatable, trackable, etc. Please do not add database_authenticatable as this module is intended to replace it.

You'll also need to set up the database schema for this:

create_table :users do |t|
  t.string :dacs_username, :null => false
end

We also recommend putting a unique index on the username column:

add_index :users, :dacs_username, :unique => true

Finally, you'll need to add some configuration to your config/initializers/devise.rb in order to tell your app how to talk to your CAS server:

Devise.setup do |config|
  ...
  config.dacs_base_url = "https://cas.myorganization.com/cgi-bin/dacs"
  
  # By default, devise_cas_authenticatable will create users.  If you would rather
  # require user records to already exist locally before they can authenticate via
  # CAS, uncomment the following line.
  # config.cas_create_user = false
end

• DACS
• Devise
• Warden

• Make it work
• Move session controller from app into plugin
• Move login flow changes from app into plugin
• Figure out how to mock DACS so it can be tested

devise_dacs_authenticatable is released under the terms and conditions of the MIT license. See the LICENSE file for more information.