Encrypt data

def CryptProtectData(
	data, description=None, optional_entropy=None,
	prompt_struct=None, flags=0,
):
	"""
	Encrypt data
	"""
	data_in = DATA_BLOB(data)
	entropy = DATA_BLOB(optional_entropy) if optional_entropy else None
	data_out = DATA_BLOB()

	res = _CryptProtectData(
		data_in,
		description,
		entropy,
		None,  # reserved
		prompt_struct,
		flags,
		data_out,
	)
	handle_nonzero_success(res)
	res = data_out.get_data()
	data_out.free()
	return res