1 files changed, 23 insertions, 0 deletions
diff --git a/lib/gitlab/rack_attack/user_allowlist.rb b/lib/gitlab/rack_attack/user_allowlist.rb
new file mode 100644
index 00000000000..f3043f44091
--- /dev/null
+++ b/lib/gitlab/rack_attack/user_allowlist.rb
@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+require 'set'
+
+module Gitlab
+  module RackAttack
+    class UserAllowlist
+      extend Forwardable
+
+      def_delegators :@set, :empty?, :include?, :to_a
+
+      def initialize(list)
+        @set = Set.new
+
+        list.to_s.split(',').each do |id|
+          @set << Integer(id) unless id.blank?
+        rescue ArgumentError
+          Gitlab::AuthLogger.error(message: 'ignoring invalid user allowlist entry', entry: id)
+        end
+      end
+    end
+  end
+end