applet.py 文件源码

def __init__(self, key):
        """ Constructor, key is 3DES2k."""
        assert len(key) == 16, "3DES key must be 16B long"
        self.e = DES.new(key[:8], DES.MODE_ECB)
        self.d = DES.new(key[8:], DES.MODE_ECB)