python进行des加密解密，而且可以与JAVA进行互相加密解密

Posted 2020-10-18 黄海的编程知识世界

import binascii
from pyDes import des, CBC, PAD_PKCS5
import uuid
import time

# pip install -i https://pypi.tuna.tsinghua.edu.cn/simple pyDes
secret_key = ‘19771011‘


# http://blog.csdn.net/lihao21/article/details/78557461?locationNum=11&fps=1
def des_encrypt(s):
    iv = secret_key
    k = des(secret_key, CBC, iv, pad=None, padmode=PAD_PKCS5)
    en = k.encrypt(s, padmode=PAD_PKCS5)
    return binascii.b2a_hex(en)


def des_descrypt(s):
    iv = secret_key
    k = des(secret_key, CBC, iv, pad=None, padmode=PAD_PKCS5)
    de = k.decrypt(binascii.a2b_hex(s), padmode=PAD_PKCS5)
    return de


def get_mac_address():
    mac = uuid.UUID(int=uuid.getnode()).hex[-12:]
    return ":".join([mac[e:e + 2] for e in range(0, 11, 2)]).upper()


# 获取时间戳
def get_time_stamp():
    ct = time.time()
    local_time = time.localtime(ct)
    data_head = time.strftime("%Y-%m-%d %H:%M:%S", local_time)
    data_secs = (ct - int(ct)) * 1000
    time_stamp = "%s.%03d" % (data_head, data_secs)
    return time_stamp


def trydecode(token):
    try:
        str_de = des_descrypt(token)
        return True, str(str_de, encoding="utf-8")
    except:
        return False, ‘无法解密‘


# 任务编号
guid = uuid.uuid3(uuid.NAMESPACE_DNS, ‘dsideal‘)
# 时间戳
timespan = get_time_stamp().replace(‘-‘, ‘‘).replace(‘:‘, ‘‘).replace(‘ ‘, ‘‘).replace(‘.‘, ‘‘)
str_en = des_encrypt(str(guid).upper() + ‘ ‘ + get_mac_address() + ‘ ‘ + timespan + ‘ ‘)
encodestr = str(str_en, encoding="utf-8")
print(‘Token:‘ + encodestr)

# 尝试解密
b, m = trydecode(encodestr)
if b:
    print(m)
else:
    print(‘无法解密！‘)