des.py

#!/usr/bin/env python
# -*- coding:utf-8 -*-
"""
-------------------------------------------------
   File Name :     des
   Description : When I wrote this, only God and I understood what I was doing. Now, only God knows.
   Author :       ltx
   date :          2020/3/5
-------------------------------------------------
"""
from Crypto.Cipher import DES
import base64


def encrypt(key, text):
    """
    DES 加密
    :param key: 密钥, 长度必须为 16(AES-128)、24(AES-192)、32(AES-256) Bytes 长度
    :param text: 密文
    :return:
    """
    encrypter = DES.new(key.encode(), DES.MODE_ECB)
    length = 8
    count = len(text)
    if count < length:
        add = (length - count)
        text = text + ('\0' * add)
    elif count > length:
        add = (length - (count % length))
        text = text + ('\0' * add)
    ciphertext = encrypter.encrypt(text.encode())
    return base64.b64encode(ciphertext)


def decrypt(key, text):
    """
    DES 解密
    :param key: 密钥
    :param text: 密文
    :return:
    """
    decrypter = DES.new(key.encode(), DES.MODE_ECB)
    return decrypter.decrypt(text).decode()


if __name__ == '__main__':
    pass