python 实现DES加密 ECB模式

# -*- coding:utf-8 -*-

import base64

import json

from Crypto.Cipher import DES

class Crypt(object):

"""加密和解密工具类"""

des_key = "12345678"

block_size = DES.block_size

pad_str = ['\x01', '\x02', '\x03', '\x04', '\x05', '\x06', '\x07', '\x08']

@classmethod

def des_base64_encrypt(cls, reqdata):

""" 基于DES和base64的加密算法

@:param reqdata 需要加密的请求数据

"""

key = cls.des_key

length = len(reqdata)

if length < cls.block_size:

add = cls.block_size - length

elif length > cls.block_size:

add = cls.block_size - (length % cls.block_size)

else:

add = 8

reqdata = reqdata + (cls.pad_str[add-1] * add)

des = DES.new(key, DES.MODE_ECB)

encrypt_data = des.encrypt(reqdata)

return base64.b64encode(encrypt_data)

@classmethod

def des_base64_decrypt(cls, retdata):

"""DES解密

@:param retdata: lakala reponse retData

"""

key = cls.des_key

debase64_data = base64.b64decode(retdata)

des = DES.new(key, DES.MODE_ECB)

decrypt_data = des.decrypt(debase64_data)

return decrypt_data