Add fields for credentials for external auth TLS

db/schema.rb

@@ -186,6 +186,11 @@ ActiveRecord::Schema.define(version: 20180320182229) do
     t.boolean "pages_domain_verification_enabled", default: true, null: false
     t.float "external_authorization_service_timeout", default: 0.5, null: false
     t.boolean "allow_local_requests_from_hooks_and_services", default: false, null: false
+    t.text "external_auth_client_cert"
+    t.text "encrypted_external_auth_client_key"
+    t.string "encrypted_external_auth_client_key_iv"
+    t.string "encrypted_external_auth_client_key_pass"
+    t.string "encrypted_external_auth_client_key_pass_iv"
   end
 
   create_table "approvals", force: :cascade do |t|

ee/db/migrate/20180315160435_add_external_auth_mutual_tls_fields_to_project_settings.rb

+class AddExternalAuthMutualTlsFieldsToProjectSettings < ActiveRecord::Migration
+
+  DOWNTIME = false
+
+  def change
+    add_column :application_settings,
+               :external_auth_client_cert, :text
+    add_column :application_settings,
+               :encrypted_external_auth_client_key, :text
+    add_column :application_settings,
+               :encrypted_external_auth_client_key_iv, :string
+    add_column :application_settings,
+               :encrypted_external_auth_client_key_pass, :string
+    add_column :application_settings,
+               :encrypted_external_auth_client_key_pass_iv, :string
+  end
+end