Add honeypot fields and minimum fill-out time for sign-up form (#15276)

* Add honeypot fields to limit non-specialized spam

Add two honeypot fields: a fake website input and a fake password confirmation
one. The label/placeholder/aria-label tells not to fill them, and they are
hidden in CSS, so legitimate users should not fall into these.

This should cut down on some non-Mastodon-specific spambots.

* Require a 3 seconds delay before submitting the registration form

* Fix tests

* Move registration form time check to model validation

* Give people a chance to clear the honeypot fields

* Refactor honeypot translation strings

Co-authored-by: Claire <claire.github-309c@sitedethib.com>

1 files changed, 7 insertions, 4 deletions

diff --git a/app/controllers/auth/registrations_controller.rb b/app/controllers/auth/registrations_controller.rb
index eb0924190..a3114ab25 100644
--- a/app/controllers/auth/registrations_controller.rb
+++ b/app/controllers/auth/registrations_controller.rb
@@ -2,6 +2,7 @@
 
 class Auth::RegistrationsController < Devise::RegistrationsController
   include Devise::Controllers::Rememberable
+  include RegistrationSpamConcern
 
   layout :determine_layout
 
@@ -13,6 +14,7 @@ class Auth::RegistrationsController < Devise::RegistrationsController
   before_action :set_body_classes, only: [:new, :create, :edit, :update]
   before_action :require_not_suspended!, only: [:update]
   before_action :set_cache_headers, only: [:edit, :update]
+  before_action :set_registration_form_time, only: :new
 
   skip_before_action :require_functional!, only: [:edit, :update]
 
@@ -45,16 +47,17 @@ class Auth::RegistrationsController < Devise::RegistrationsController
   def build_resource(hash = nil)
     super(hash)
 
-    resource.locale      = I18n.locale
-    resource.invite_code = params[:invite_code] if resource.invite_code.blank?
-    resource.sign_up_ip  = request.remote_ip
+    resource.locale                 = I18n.locale
+    resource.invite_code            = params[:invite_code] if resource.invite_code.blank?
+    resource.registration_form_time = session[:registration_form_time]
+    resource.sign_up_ip             = request.remote_ip
 
     resource.build_account if resource.account.nil?
   end
 
   def configure_sign_up_params
     devise_parameter_sanitizer.permit(:sign_up) do |u|
-      u.permit({ account_attributes: [:username], invite_request_attributes: [:text] }, :email, :password, :password_confirmation, :invite_code, :agreement)
+      u.permit({ account_attributes: [:username], invite_request_attributes: [:text] }, :email, :password, :password_confirmation, :invite_code, :agreement, :website, :confirm_password)
     end
   end