fix(saml): add setup route to OmniauthRegistrationsController

config/initializers/omniauth_saml.rb

@@ -14,7 +14,7 @@
 
         idp_metadata_url = provider_config[:idp_metadata_url]
 
-        if env["omniauth.strategy"].on_setup_path? && request.params["action"] == "idp_entity_selector_url"
+        if env["omniauth.strategy"].on_setup_path? && request.params["setup_action"] == "idp_entity_selector_url"
           env["omniauth.strategy"].idp_entity_setup
           idp_metadata_url = env["omniauth.strategy"].options[:idp_metadata_url]
         end
@@ -88,12 +88,6 @@
           Rails.logger.debug v
         end
         Rails.logger.debug "+++++++++++++++++++++++++++++++++++++++++++++++++++++++++"
-
-        if env["omniauth.strategy"].on_setup_path? && request.params["action"] == "idp_entity_selector_url"
-          Rails.logger.debug "(#{env["omniauth.strategy"].name}) Setup phase redirected to Request call"
-          env["omniauth.strategy"].skip_setup
-          return env["omniauth.strategy"].request_call
-        end
       }
     )
   end

config/routes.rb

@@ -13,4 +13,8 @@
   mount Decidim::Core::Engine => "/"
   # mount Decidim::Map::Engine => '/map'
   # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
+
+  devise_scope :user do
+    get "/users/auth/:provider/setup" => "decidim/devise/omniauth_registrations#setup"
+  end
 end

lib/extends/controllers/decidim/devise/omniauth_registrations_controller_extends.rb

@@ -7,6 +7,15 @@ module OmniauthRegistrationsControllerExtends
     skip_before_action :verify_authenticity_token, only: [:imt, :failure]
     skip_after_action :verify_same_origin_request, only: [:imt, :failure]
   end
+
+  def setup
+    Rails.logger.debug "Decidim::Devise::OmniauthRegistrationsController#setup"
+    if request.env["omniauth.strategy"].on_setup_path? && request.params["setup_action"] == "idp_entity_selector_url"
+      Rails.logger.debug "(#{request.env["omniauth.strategy"].name}) Setup phase redirected to Request call"
+      request.env["omniauth.strategy"].skip_setup
+      redirect_to request.env["omniauth.strategy"].request_call
+    end
+  end
 end
 
 Decidim::Devise::OmniauthRegistrationsController.class_eval do

lib/omniauth/strategies/imt.rb

@@ -43,7 +43,6 @@ def skip_setup
       end
 
       def redirect_to_entity_selector
-        @skip_request_phase = true
         Rails.logger.debug "Redirecting to entity selector URL : #{entity_selector_url}"
         redirect(entity_selector_url)
       end
@@ -64,7 +63,7 @@ def entity_selector_url
       def entity_selector_callback_url
         uri = URI.parse(full_host + setup_path)
         uri.query = {
-          action: "idp_entity_selector_url",
+          setup_action: "idp_entity_selector_url",
           state: new_state
         }.to_query
         uri.to_s
@@ -97,7 +96,11 @@ def request_phase
         if options[:idp_entity_selector_url].present? && !@skip_idp_entity_setup
           redirect_to_entity_selector
         else
-          super
+          authn_request = OneLogin::RubySaml::Authrequest.new
+
+          with_settings do |settings|
+            return  authn_request.create(settings, additional_params_for_authn_request)
+          end
         end
       end