devise_saml_authenticatable | Devise SAML 2.0 authentication strategy | Authentication library

If you must support multiple Identity Providers you can implement an adapter class with a #settings method that takes an IdP entity id and returns a hash of settings for the corresponding IdP. The config.idp_settings_adapter then must be set to point to your adapter in config/initializers/devise.rb. The implementation of the adapter is up to you. A simple example may look like this:. Settings specified in the adapter will override settings in config/initializers/devise.rb. This is useful for establishing common settings or defaults across all IdPs. Detecting the entity ID passed to the settings method is done by config.idp_entity_id_reader. By default this will find the Issuer in the SAML request. You can support more use cases by writing your own and implementing the .entity_id method. If you use encrypted assertions, your entity ID reader will need to understand how to decrypt the response from each of the possible IdPs.