Merge pull request SAML-Toolkits#256 from levelboy/separate_create_xml_from_signing

Separated the create_authentication_xml_doc in two methods

Author: pitbulk

lib/onelogin/ruby-saml/authrequest.rb

@@ -87,6 +87,11 @@ def create_params(settings, params={})
       # @return [String] The SAMLRequest String.
       #
       def create_authentication_xml_doc(settings)
+        document = create_xml_document(settings)
+        sign_document(document, settings)
+      end
+
+      def create_xml_document(settings)
         time = Time.now.utc.strftime("%Y-%m-%dT%H:%M:%SZ")
 
         request_doc = XMLSecurity::Document.new
@@ -141,14 +146,18 @@ def create_authentication_xml_doc(settings)
           end
         end
 
+        request_doc
+      end
+
+      def sign_document(document, settings)
         # embed signature
         if settings.security[:authn_requests_signed] && settings.private_key && settings.certificate && settings.security[:embed_sign] 
           private_key = settings.get_sp_key
           cert = settings.get_sp_cert
-          request_doc.sign_document(private_key, cert, settings.security[:signature_method], settings.security[:digest_method])
+          document.sign_document(private_key, cert, settings.security[:signature_method], settings.security[:digest_method])
         end
 
-        request_doc
+        document
       end
 
     end