Encrypt runners communication token in the database

app/models/ci/runner.rb

@@ -8,6 +8,9 @@ module Ci
     include RedisCacheable
     include ChronicDurationAttribute
     include FromUnion
+    include TokenAuthenticatable
+
+    add_authentication_token_field :token, encrypted: true, fallback: true
 
     enum access_level: {
       not_protected: 0,
@@ -39,7 +42,7 @@ module Ci
 
     has_one :last_build, ->() { order('id DESC') }, class_name: 'Ci::Build'
 
-    before_validation :set_default_values
+    before_save :ensure_token
 
     scope :active, -> { where(active: true) }
     scope :paused, -> { where(active: false) }
@@ -145,10 +148,6 @@ module Ci
       end
     end
 
-    def set_default_values
-      self.token = SecureRandom.hex(15) if self.token.blank?
-    end
-
     def assign_to(project, current_user = nil)
       if instance_type?
         self.runner_type = :project_type

db/migrate/20181120151656_add_token_encrypted_to_ci_runners.rb

@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+class AddTokenEncryptedToCiRunners < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  def change
+    add_column :ci_runners, :token_encrypted, :string
+    # TODO index
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20181116141504) do
+ActiveRecord::Schema.define(version: 20181120151656) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -543,6 +543,7 @@ ActiveRecord::Schema.define(version: 20181116141504) do
     t.string "ip_address"
     t.integer "maximum_timeout"
     t.integer "runner_type", limit: 2, null: false
+    t.string "token_encrypted"
   end
 
   add_index "ci_runners", ["contacted_at"], name: "index_ci_runners_on_contacted_at", using: :btree

lib/gitlab/import_export/import_export.yml

@@ -158,6 +158,9 @@ excluded_attributes:
     - :encrypted_token_iv
     - :encrypted_url
     - :encrypted_url_iv
+  runners:
+    - :token
+    - :token_encrypted
 
 methods:
   labels:

lib/gitlab/import_export/relation_factory.rb

@@ -8,6 +8,7 @@ module Gitlab
                     triggers: 'Ci::Trigger',
                     pipeline_schedules: 'Ci::PipelineSchedule',
                     builds: 'Ci::Build',
+                    runners: 'Ci::Runner',
                     hooks: 'ProjectHook',
                     merge_access_levels: 'ProtectedBranch::MergeAccessLevel',
                     push_access_levels: 'ProtectedBranch::PushAccessLevel',
@@ -31,7 +32,7 @@ module Gitlab
 
       EXISTING_OBJECT_CHECK = %i[milestone milestones label labels project_label project_labels group_label group_labels project_feature].freeze
 
-      TOKEN_RESET_MODELS = %w[Project Namespace Group Ci::Trigger Ci::Build ProjectHook].freeze
+      TOKEN_RESET_MODELS = %w[Project Namespace Ci::Trigger Ci::Build Ci::Runner ProjectHook].freeze
 
       def self.create(*args)
         new(*args).create