python 實現DES加解密

from pyDes import *
import base64
class Des3(object):
    def __init__(self, key, iv):
        # 這里密鑰key長度必須為16/24, ,偏移量ivs
        self.key = key
        self.mode = CBC
        self.iv = iv

    # 加密函數，如果text不是16的倍數【加密文本text必須為16的倍數！】，那就補足為16的倍數
    def encrypt(self, text):
        des3 = triple_des(self.key, self.mode, self.iv, pad=None, padmode=PAD_PKCS5)
        data = des3.encrypt(text)
        data = base64.b64encode(data)
        return data.decode('utf-8')

    # 解密后，去掉補足的空格用strip() 去掉
    def decrypt(self, data):
        des3 = triple_des(self.key, self.mode, self.iv, pad=None, padmode=PAD_PKCS5)
        data = base64.b64decode(data)
        text = des3.decrypt(data)
        return text.decode('hex')