class ActionDispatch::Cookies::EncryptedCookieJar

def commit(options)
  options[:value] = @encryptor.encrypt_and_sign(serialize(options[:value]))
  raise CookieOverflow if options[:value].bytesize > MAX_COOKIE_SIZE
end

def initialize(parent_jar)
  super
  if ActiveSupport::LegacyKeyGenerator === key_generator
    raise "You didn't set secrets.secret_key_base, which is required for this cookie jar. " +
      "Read the upgrade documentation to learn more about this new config option."
  end
  secret = key_generator.generate_key(request.encrypted_cookie_salt || "")[0, ActiveSupport::MessageEncryptor.key_len]
  sign_secret = key_generator.generate_key(request.encrypted_signed_cookie_salt || "")
  @encryptor = ActiveSupport::MessageEncryptor.new(secret, sign_secret, digest: digest, serializer: ActiveSupport::MessageEncryptor::NullSerializer)
end

def parse(name, encrypted_message)
  deserialize name, @encryptor.decrypt_and_verify(encrypted_message)
rescue ActiveSupport::MessageVerifier::InvalidSignature, ActiveSupport::MessageEncryptor::InvalidMessage
  nil
end