set message_encryptor default cipher to aes-256-gcm

- Introduce a method to select default cipher, and maintain backward compatibility

1 files changed, 7 insertions, 0 deletions

diff --git a/activesupport/lib/active_support/railtie.rb b/activesupport/lib/active_support/railtie.rb
index 1b4ecf4d72..61d6e4aae3 100644
--- a/activesupport/lib/active_support/railtie.rb
+++ b/activesupport/lib/active_support/railtie.rb
@@ -7,6 +7,13 @@ module ActiveSupport
 
     config.eager_load_namespaces << ActiveSupport
 
+    initializer "active_support.set_authenticated_message_encryption" do |app|
+      if app.config.active_support.respond_to?(:use_authenticated_message_encryption)
+        ActiveSupport::MessageEncryptor.use_authenticated_message_encryption =
+          app.config.active_support.use_authenticated_message_encryption
+      end
+    end
+
     initializer "active_support.reset_all_current_attributes_instances" do |app|
       app.reloader.before_class_unload { ActiveSupport::CurrentAttributes.clear_all }
       app.executor.to_run              { ActiveSupport::CurrentAttributes.reset_all }