背景：想给公司的进件流程写一套进件脚本，首先遇到的就是加密解密。公司用的 DES3 + base64 加密解密
一、安装pycrypto模块，推荐用pycrypto编译文件，直接下载安装就行
.uk/python/modules.shtml#pycrypto
二、上代码，。此套代码是在 AES解密的基础上调整
#coding=utf-8
from Crypto.Cipher import _DES3 #加密解密方法
import base64
BS = _DES3.block_size
import json
import requests
def pad(s):
return s + (BS - len(s) % BS) * chr(BS - len(s) % BS)
#定义 padding 即 填充 为PKCS7
def unpad(s):
return s[0:-ord(s[-1])]
class prpcrypt():
def __init__(self, key):
self.key = key
self.mode = _DES3.MODE_CBC
self.iv = IV
# DES3的加密模式为CBC
def encrypt(self, text):
text = pad(text)
cryptor = _DES3.new(self.key, self.mode, self.iv)
#self.iv 为 IV 即偏移量
x = len(text) % 8
if x != 0:
text = text + '\0' * (8 - x) # 不满16，32，64位补0
# print(text)
self.ciphertext = cryptor.encrypt(text)
return base64.standard_b64encode(self.ciphertext).decode("utf-8")
def decrypt(self, text):
cryptor = _DES3.new(self.key, self.mode, self.iv)
de_text = base64.standard_b64decode(text)
plain_text = cryptor.decrypt(de_text)
# st = str(plain_text.decode("utf-8")).rstrip('\0')
# out = unpad(st)
# return out
#上面注释内容解密如果运行报错，就注释掉试试
return plain_text
if __name__ == '__main__':
iv = "******"#IV偏移量
pc = prpcrypt('******') # 自己设定的密钥
message = {"ARRAYDATA":
{"FACILITYID":"","FACILITYNAME":"","FACILITYTYPE":"","PASSWORD":"***","USERNO":"***"},
"TOKEN":"***",
}
js = json.dumps(message)#字典转str，再加密
print type(js)
e = pc.encrypt(js) # 加密内容
d = pc.decrypt(e) #解密内容
print e #加密后
print d #解密后
url = "***"
header = {"Content-Type":"application/x-www-form-urlencoded",
"Accept-Encoding": "gzip",
"User-Agent": "okhttp/3.8.0"}
message1 ={"message":e}
r = requests.post(url,headers=header,data=message1)
text1 = r.text
print text1
d1 = pc.decrypt(text1)
print d1
r = re.findall('\{(.+)\}',d1) #取值，对于返回值后面带有特殊字符，如空格、\等
d = eval("{"+r[0]+"}") #str转化成字典
token = d["ARRAYDATA"]["TOKEN"]#字典取值
print token
