Provides strategies for authenticating to providers using the OpenID standard.


To get just OpenID functionality:

gem install oa-openid

For the full auth suite:

gem install omniauth

Stand-Alone Example

Use the strategy as a middleware in your application:

require 'omniauth/openid'
require 'openid/store/filesystem'

use Rack::Session::Cookie
use OmniAuth::Strategies::OpenID,'/tmp')

Then simply direct users to '/auth/open_id' to prompt them for their OpenID identifier. You may also pre-set the identifier by passing an identifier parameter to the URL (Example: /auth/open_id?

A list of all OpenID stores is available at

OmniAuth Builder

If OpenID is one of several authentication strategies, use the OmniAuth Builder:

require 'omniauth/openid'
require 'omniauth/basic'  # for Campfire
require 'openid/store/filesystem'

use OmniAuth::Builder do
  provider :open_id,'/tmp')
  provider :campfire

Configured Identifiers

You may pre-configure an OpenID identifier. For example, to use Google's main OpenID endpoint:

use OmniAuth::Builder do
  provider :open_id, nil, :name => 'google', :identifier => ''

Note the use of nil, which will trigger ruby-openid's default Memory Store.