def add_to_16(text):
    if (len(text.encode('utf-8')) % 16):
        add = (16 - (len(text.encode('utf-8')) % 16))
    else:
        add = 0
    text = (text + ('\x00' * add))
    return text.encode('utf-8')
def add_to_16(text):
    if (len(text.encode('utf-8')) % 16):
        add = (16 - (len(text.encode('utf-8')) % 16))
    else:
        add = 0
    text = (text + ('\x00' * add))
    return text.encode('utf-8')