des结合base64加解密的python源码

#coding=utf8

from pyDes import *

import base64

class Crypt_Error():

    pass

"""

des方法,des(处理后的秘钥,加密方式，位移向量，位移方式，填充方式)

"""

def _get_key(key):

    if not key:

        key="U8y0R81k"

    elif len(key)>8:

        key=key[0:8]

    elif len(key)<8:

        raise Crypt_Error('秘钥长度不足八位，请检查秘钥')

    return key

def encrypt_data(data,key):

    """

    加密

    :return:

    """

    k = des(_get_key(key), ECB, "\0\0\0\0\0\0\0\0", pad=None, padmode=PAD_PKCS5)

    d = base64.encodestring(k.encrypt(data))

    return ''.join(d.split('\n')[:-1])

def decrypt_data(data,key):

    """

    解密

    :param data:

    :return:

    """

    data = base64.decodestring(data)

    k = des(_get_key(key), ECB, "\0\0\0\0\0\0\0\0", pad=None, padmode=PAD_PKCS5)

    return k.decrypt(data, pad=None, padmode=PAD_PKCS5)

# if __name__=='__main__':

#     data = "123456"

#     key= "e10adc3949ba59abbe56e057f20f88dd"

#     b=encrypt_data(data,key)

#

#     print b

#     print decrypt_data(b,key)