inopinatus

require 'cgi'
require 'active_support'

def verify_and_decrypt_session_cookie(cookie, secret_key_base = Rails.application.secret_key_base)
  cookie = CGI::unescape(cookie)
  salt   = 'authenticated encrypted cookie'
  encrypted_cookie_cipher = 'aes-256-gcm'
  serializer = ActiveSupport::MessageEncryptor::NullSerializer

  key_generator = ActiveSupport::KeyGenerator.new(secret_key_base, iterations: 1000)