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最新推荐文章于 2025-06-11 21:14:16 发布

2401_83621784

最新推荐文章于 2025-06-11 21:14:16 发布

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分类专栏： 2024年程序员学习文章标签：爬虫

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4"


 请求返回的一堆乱七八糟的字符就是加密过后的数据。（**当然了，你服务器给我加密后的数据，你想要展示到浏览器页面上肯定需要本地解密数据，你肯定不会把这一堆乱码展示出来的。**）


![在这里插入图片描述](https://img-blog.csdnimg.cn/1077ce79374f46a5b8ce536c89f1135a.png#pic_center)


* 那么我们就需要去找对应的 js 解密流程。


![在这里插入图片描述](https://img-blog.csdnimg.cn/928c4dc25d544409bd3dd57f2b077840.png#pic_center)


通过九牛二虎之力终于找到了解密的地方，这一步是最耗时，最容易秃头的步骤。


![在这里插入图片描述](https://img-blog.csdnimg.cn/6e69c2d1f38342ec97fd002dec77ea1f.png#pic_center)


**找逆向切入点主要方法有：**



> 
> * 关键字搜索，打断点调试
> * 利用XHR设置断点；
> * 查看调用栈。
> 
> 
> 


这个网页我是通过打**XHR**断点 + 搜索关键字**decrtpt(解密**)的方式找到了这个加密处。


![在这里插入图片描述](https://img-blog.csdnimg.cn/aafa26c239f54b2aaf5d53740ce37eb5.png#pic_center)



来看看调试出来的数据吧~

{“code”:200,“data”:
{“list”:[{“QY_FR_NAME”:“缪存旭”,“QY_REGION”:“350200”,“QY_NAME”:“厦门兴海湾工程管理有限公司”,“QY_REGION_NAME”:“福建省-厦门市”,“QY_ORG_CODE”:“913502112601177740”,“COLLECT_TIME”:1477106448000,“RN”:31,“QY_ID”:“616160676166636361616466606865656369”,“QY_SRC_TYPE”:“0”,“OLD_CODE”:“260117774”},
{“QY_FR_NAME”:“陈有良”,“QY_REGION”:“330800”,“QY_NAME”:“浙江洲道工程管理有限公司”,“QY_REGION_NAME”:“浙江省-衢州市”,“QY_ORG_CODE”:“91330802330012039P”,“COLLECT_TIME”:1477106529000,“RN”:32,“QY_ID”:“616160676166636361616466606865656261”,“QY_SRC_TYPE”:“0”,“OLD_CODE”:“330012039”},
{“QY_FR_NAME”:“徐丙水”,“QY_REGION”:“370100”,“QY_NAME”:“山东省正大建设监理有限公司”,“QY_REGION_NAME”:“山东省-济南市”,“QY_ORG_CODE”:“913701022671825366”,“COLLECT_TIME”:1477106425000,“RN”:33,“QY_ID”:“616160676166636361616466606865656260”,“QY_SRC_TYPE”:“0”,“OLD_CODE”:“267182536”},
{“QY_FR_NAME”:“王仲”,“QY_REGION”:“510100”,“QY_NAME”:“凯邦建设管理集团有限公司”,“QY_REGION_NAME”:“四川省-成都市”,“QY_ORG_CODE”:“91510105725354703M”,“COLLECT_TIME”:1477106469000,“RN”:34,“QY_ID”:“616160676166636361616466606865656263”,“QY_SRC_TYPE”:“0”,“OLD_CODE”:“725354703”},
{“QY_FR_NAME”:“刘一诺”,“QY_REGION”:“371300”,“QY_NAME”:“临沂宏利建设工程监理咨询有限公司”,“QY_REGION_NAME”:“山东省-临沂市”,“QY_ORG_CODE”:“913713005543587173”,“COLLECT_TIME”:1477106454000,“RN”:35,“QY_ID”:“616160676166636361616466606865656262”,“QY_SRC_TYPE”:“0”,“OLD_CODE”:“554358717”},
{“QY_FR_NAME”:“王红娟”,“QY_REGION”:“410100”,“QY_NAME”:“河南中建工程技术有限公司”,“QY_REGION_NAME”:“河南省-郑州市”,“QY_ORG_CODE”:“914101057919311268”,“COLLECT_TIME”:1477106526000,“RN”:36,“QY_ID”:“616160676166636361616466606865656265”,“QY_SRC_TYPE”:“0”,“OLD_CODE”:“791931126”},
{“QY_FR_NAME”:“林锦”,“QY_REGION”:“350100”,“QY_NAME”:“福建省建信工程管理集团有限公司”,“QY_REGION_NAME”:“福建省-福州市”,“QY_ORG_CODE”:“913501001544135960”,“COLLECT_TIME”:1477106407000,“RN”:37,“QY_ID”:“616160676166636361616466606865656264”,“QY_SRC_TYPE”:“0”,“OLD_CODE”:“154413596”},
{“QY_FR_NAME”:“杨高保”,“QY_REGION”:“421200”,“QY_NAME”:“嘉鱼县嘉泰建设监理有限责任公司”,“QY_REGION_NAME”:“湖北省-咸宁市”,“QY_ORG_CODE”:“91421221737145124M”,“COLLECT_TIME”:1477106486000,“RN”:38,“QY_ID”:“616160676166636361616466606865656267”,“QY_SRC_TYPE”:“0”,“OLD_CODE”:“737145124”},
{“QY_FR_NAME”:“蒋亚斌”,“QY_REGION”:“410800”,“QY_NAME”:“河南协同工程监理有限公司”,“QY_REGION_NAME”:“河南省-焦作市”,“QY_ORG_CODE”:“91410800555731456W”,“COLLECT_TIME”:1477106405000,“RN”:39,“QY_ID”:“616160676166636361616466606865656266”,“QY_SRC_TYPE”:“0”,“OLD_CODE”:“555731456”},
{“QY_FR_NAME”:“黄向军”,“QY_REGION”:“450100”,“QY_NAME”:“广西南宁建科工程监理有限责任公司”,“QY_REGION_NAME”:“广西壮族自治区-南宁市”,“QY_ORG_CODE”:“914501031983159639”,“COLLECT_TIME”:1477106406000,“RN”:40,“QY_ID”:“616160676166636361616466606865656269”,“QY_SRC_TYPE”:“0”,“OLD_CODE”:“198315963”},
{“QY_FR_NAME”:“廖渊”,“QY_REGION”:“510100”,“QY_NAME”:“成都海龙工程项目管理有限公司”,“QY_REGION_NAME”:“四川省-成都市”,“QY_ORG_CODE”:“91510100201986152W”,“COLLECT_TIME”:1477106437000,“RN”:41,“QY_ID”:“616160676166636361616466606865656268”,“QY_SRC_TYPE”:“0”,“OLD_CODE”:“201986152”},
{“QY_FR_NAME”:“邹赟”,“QY_REGION”:“360500”,“QY_NAME”:“新余市永固工程监理有限责任公司”,“QY_REGION_NAME”:“江西省-新余市”,“QY_ORG_CODE”:“91360500723935352F”,“COLLECT_TIME”:1477109337000,“RN”:42,“QY_ID”:“616160676166636361616466606865656561”,“QY_SRC_TYPE”:“0”,“OLD_CODE”:“723935352”},
{“QY_FR_NAME”:“王文权”,“QY_REGION”:“371300”,“QY_NAME”:“山东政航工程咨询有限公司”,“QY_REGION_NAME”:“山东省-临沂市”,“QY_ORG_CODE”:“91371302092199458A”,“COLLECT_TIME”:1477106426000,“RN”:43,“QY_ID”:“616160676166636361616466606865656560”,“QY_SRC_TYPE”:“0”,“OLD_CODE”:“092199458”},
{“QY_FR_NAME”:“张洪建”,“QY_REGION”:“530100”,“QY_NAME”:“云南金吉安建设咨询监理有限公司”,“QY_REGION_NAME”:“云南省-昆明市”,“QY_ORG_CODE”:“91530000719414685K”,“COLLECT_TIME”:1479833531000,“RN”:44,“QY_ID”:“616160676166636361616466606865656567”,“QY_SRC_TYPE”:“0”,“OLD_CODE”:“719414685”},
{“QY_FR_NAME”:“张志明”,“QY_REGION”:“610700”,“QY_NAME”:“汉中志诚建设工程监理有限责任公司”,“QY_REGION_NAME”:“陕西省-汉中市”,“QY_ORG_CODE”:“91610725667992132H”,“COLLECT_TIME”:1477106417000,“RN”:45,“QY_ID”:“616160676166636361616466606865656568”,“QY_SRC_TYPE”:“0”,“OLD_CODE”:“667992132”}],
“pageNum”:2,“pageSize”:15,“total”:450},“message”:“”,“success”:true}



从上面的图片，我们可以知道解密流程是由一个**h函数**实现的，**h 函数**把传进来的参数t（就是那一大串加密的字符），通过**AES**解密后返回了一个**json**格式的字符串，这就是我们想要的数据了。


下面我们开始用 python 去模拟这一流程：


![在这里插入图片描述](https://img-blog.csdnimg.cn/bd4a25809bb04f51bc22b91e2c349330.png#pic_center)


OK，我们可以通过 **requests** 获得加密后的数据了，下面的步骤就是将字符解密。


![在这里插入图片描述](https://img-blog.csdnimg.cn/968fd6db65074429a34e6fabddcff86a.png#pic_center)



> 
> 这是逆向过程中第二费时的步骤，**抠网页中的 js 代码然后用pyexecjs模块去执行获得解密数据; 或者将网页中的 js 代码用  
>  python 进行重写(就是把 js 代码逻辑改成 python 的)。**
> 
> 
> 


![在这里插入图片描述](https://img-blog.csdnimg.cn/58f428d3b16245c5ab5dc8f8e188025b.png#pic_center)



得来全不费工夫~~~就在上面挨着，拿到密钥和**vi**之后，就可以使用**Python**中的**Crypto**模块进行**AES**解密。详细代码如下：

import requests
from Crypto.Cipher import AES
from binascii import b2a_hex, a2b_hex

向url发起请求，参数page_num为请求的页码数

def request(page_num):
headers = {
‘Connection’: ‘keep-alive’,
‘Pragma’: ‘no-cache’,
‘Cache-Control’: ‘no-cache’,
‘Accept’: ‘application/json, text/plain, /’,
‘timeout’: ‘30000’,
‘accessToken’: ‘’,
‘User-Agent’: ‘Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.104 Safari/537.36’,
‘Referer’: ‘http://jzsc.mohurd.gov.cn/data/company’,
‘Accept-Language’: ‘zh-CN,zh;q=0.9’,
}

params = (
(‘pg’, page_num),
(‘pgsz’, ‘15’),
(‘total’, ‘450’),
)
response = requests.get(‘http://jzsc.mohurd.xxx.cn/api/webApi/dataservice/query/comp/list’, headers=headers, params=params, verify=False)
return response.text

对请求回来的响应数据进行解密，参数text为响应数据

def decrypt(text):
key = ‘jo8j9wGw%6HbxfFn’.encode(‘utf-8’) //密钥
iv = ‘0123456789ABCDEF’.encode(‘utf-8’) //加密偏移量
mode = AES.MODE_CBC //加密模式
cryptos = AES.new(key, mode, iv)
plain_text = cryptos.decrypt(a2b_hex(text))
return bytes.decode(plain_text).rstrip(‘\0’)