Add `authorized_fetch` server setting in addition to env var (#25798)

app/controllers/application_controller.rb

@@ -11,6 +11,7 @@ class ApplicationController < ActionController::Base
   include CacheConcern
   include DomainControlHelper
   include DatabaseHelper
+  include AuthorizedFetchHelper
 
   helper_method :current_account
   helper_method :current_session
@@ -51,10 +52,6 @@ class ApplicationController < ActionController::Base
 
   private
 
-  def authorized_fetch_mode?
-    ENV['AUTHORIZED_FETCH'] == 'true' || Rails.configuration.x.limited_federation_mode
-  end
-
   def public_fetch_mode?
     !authorized_fetch_mode?
   end

app/helpers/authorized_fetch_helper.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+module AuthorizedFetchHelper
+  def authorized_fetch_mode?
+    ENV.fetch('AUTHORIZED_FETCH') { Setting.authorized_fetch } == 'true' || Rails.configuration.x.limited_federation_mode
+  end
+
+  def authorized_fetch_overridden?
+    ENV.key?('AUTHORIZED_FETCH') || Rails.configuration.x.limited_federation_mode
+  end
+end

app/javascript/styles/mastodon/accounts.scss

@@ -188,6 +188,7 @@
 }
 
 .information-badge,
+.simple_form .overridden,
 .simple_form .recommended,
 .simple_form .not_recommended {
   display: inline-block;
@@ -204,6 +205,7 @@
 }
 
 .information-badge,
+.simple_form .overridden,
 .simple_form .recommended,
 .simple_form .not_recommended {
   background-color: rgba($ui-secondary-color, 0.1);

app/javascript/styles/mastodon/forms.scss

@@ -103,6 +103,7 @@ code {
         }
       }
 
+      .overridden,
       .recommended,
       .not_recommended {
         position: absolute;

app/models/form/admin_settings.rb

@@ -3,6 +3,8 @@
 class Form::AdminSettings
   include ActiveModel::Model
 
+  include AuthorizedFetchHelper
+
   KEYS = %i(
     site_contact_username
     site_contact_email
@@ -34,6 +36,7 @@ class Form::AdminSettings
     backups_retention_period
     status_page_url
     captcha_enabled
+    authorized_fetch
   ).freeze
 
   INTEGER_KEYS = %i(
@@ -54,6 +57,7 @@ class Form::AdminSettings
     noindex
     require_invite_text
     captcha_enabled
+    authorized_fetch
   ).freeze
 
   UPLOAD_KEYS = %i(
@@ -61,6 +65,10 @@ class Form::AdminSettings
     mascot
   ).freeze
 
+  OVERRIDEN_SETTINGS = {
+    authorized_fetch: :authorized_fetch_mode?,
+  }.freeze
+
   attr_accessor(*KEYS)
 
   validates :registrations_mode, inclusion: { in: %w(open approved none) }, if: -> { defined?(@registrations_mode) }
@@ -80,6 +88,8 @@ class Form::AdminSettings
 
       stored_value = if UPLOAD_KEYS.include?(key)
                        SiteUpload.where(var: key).first_or_initialize(var: key)
+                     elsif OVERRIDEN_SETTINGS.include?(key)
+                       public_send(OVERRIDEN_SETTINGS[key])
                      else
                        Setting.public_send(key)
                      end

app/services/concerns/payloadable.rb

@@ -1,6 +1,8 @@
 # frozen_string_literal: true
 
 module Payloadable
+  include AuthorizedFetchHelper
+
   # @param [ActiveModelSerializers::Model] record
   # @param [ActiveModelSerializers::Serializer] serializer
   # @param [Hash] options
@@ -23,6 +25,6 @@ module Payloadable
   end
 
   def signing_enabled?
-    ENV['AUTHORIZED_FETCH'] != 'true' && !Rails.configuration.x.limited_federation_mode
+    !authorized_fetch_mode?
   end
 end

app/views/admin/settings/discovery/show.html.haml

@@ -39,6 +39,11 @@
   .fields-group
     = f.input :peers_api_enabled, as: :boolean, wrapper: :with_label, recommended: :recommended
 
+  %h4= t('admin.settings.security.federation_authentication')
+
+  .fields-group
+    = f.input :authorized_fetch, as: :boolean, wrapper: :with_label, label: t('admin.settings.security.authorized_fetch'), warning_hint: authorized_fetch_overridden? ? t('admin.settings.security.authorized_fetch_overridden_hint') : nil, hint: t('admin.settings.security.authorized_fetch_hint'), disabled: authorized_fetch_overridden?, recommended: authorized_fetch_overridden? ? :overridden : nil
+
   %h4= t('admin.settings.discovery.follow_recommendations')
 
   .fields-group

config/i18n-tasks.yml

@@ -50,7 +50,7 @@ ignore_unused:
   - 'activerecord.errors.*'
   - '{devise,pagination,doorkeeper}.*'
   - '{date,datetime,time,number}.*'
-  - 'simple_form.{yes,no,recommended,not_recommended}'
+  - 'simple_form.{yes,no,recommended,not_recommended,overridden}'
   - 'simple_form.{placeholders,hints,labels}.*'
   - 'simple_form.{error_notification,required}.:'
   - 'errors.messages.*'

config/initializers/simple_form.rb

@@ -97,6 +97,7 @@ SimpleForm.setup do |config|
       end
     end
 
+    b.use :warning_hint, wrap_with: { tag: :span, class: [:hint, 'warning-hint'] }
     b.use :hint, wrap_with: { tag: :span, class: :hint }
     b.use :error, wrap_with: { tag: :span, class: :error }
   end
@@ -111,8 +112,8 @@ SimpleForm.setup do |config|
   config.wrappers :with_block_label, class: [:input, :with_block_label], hint_class: :field_with_hint, error_class: :field_with_errors do |b|
     b.use :html5
     b.use :label
-    b.use :hint, wrap_with: { tag: :span, class: :hint }
     b.use :warning_hint, wrap_with: { tag: :span, class: [:hint, 'warning-hint'] }
+    b.use :hint, wrap_with: { tag: :span, class: :hint }
     b.use :input, wrap_with: { tag: :div, class: :label_input }
     b.use :error, wrap_with: { tag: :span, class: :error }
   end

config/locales/en.yml

@@ -770,6 +770,11 @@ en:
           approved: Approval required for sign up
           none: Nobody can sign up
           open: Anyone can sign up
+      security:
+        authorized_fetch: Require authentication from federated servers
+        authorized_fetch_hint: Requiring authentication from federated servers enables stricter enforcement of both user-level and server-level blocks. However, this comes at the cost of a performance penalty, reduces the reach of your replies, and may introduce compatibility issues with some federated services. In addition, this will not prevent dedicated actors from fetching your public posts and accounts.
+        authorized_fetch_overridden_hint: You are currently unable to change this setting because it is overridden by an environment variable.
+        federation_authentication: Federation authentication enforcement
       title: Server settings
     site_uploads:
       delete: Delete uploaded file

config/locales/simple_form.en.yml

@@ -317,6 +317,7 @@ en:
         url: Endpoint URL
     'no': 'No'
     not_recommended: Not recommended
+    overridden: Overridden
     recommended: Recommended
     required:
       mark: "*"