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抓包分析，发现请求头参数有加密，表单有加密，返回的数据也是加密的。
请求头Source是固定的，其他的Sign,以及Timsestamp是加密的
请求载荷也是加密的
返回的数据也是加密的。
而且仔细看，它们都是数字和a到f的字母组成的，就很想哈希算法进行加密。实际上运用的就是sm3和sm4的算法，详情见前面对这些加密算法的讲解。
先解决请求头参数的加密：
直接搜索，一下子就找到加密位置了，打上断点，先分析sign参数
打印参数，继续分析，因此需要找的加密函数就是r和d
进入函数r,打上断点，发现是运用了函数s,而函数s在前面已经提示是sm3加密方法。
因此直接利用专门的库对参数进行加密，发现果然跟浏览器中加密的一致：
解决了函数r,那么现在来解决函数d
发现函数d，就是一个sm4加密的，e是函数r返回的带加密的数据，c是密钥
进入l函数，看一下sm4是ECB还是CBC，是否要向量IV，以及填充的方式是什么
发现l函数是m函数，打断点，进入m函数，仔细看这段代码，告诉我们了关键信息。
直接写代码：
综合分析一下，sign怎么来的，首先表单数据，包括页码，翻页尺寸等等经过处理用&连接，进行sm3加密，然后字母大写，再经过sm4加密，密钥是
30062AFC48C0E7B5B0918851C0445A37，ECB的模式。
同理这样分析，就知道时间戳是对当前时间戳，进行sm4加密，密钥同样是
30062AFC48C0E7B5B0918851C0445A37，加密数据是时间戳。
改进一下我们的代码，定义两个加密函数。
const sm3 = require('sm-crypto-v2').sm3;
const { SM4 } = require('gm-crypto');
const key = '30062AFC48C0E7B5B0918851C0445A37'; // 32位十六进制数字
function sm3_encrypted(data){
return sm3(data).toLocaleUpperCase()
};
function sm4_encrypted(key,data){
const encryptedECB = SM4.encrypt(data, key, {
mode: SM4.constants.ECB,
inputEncoding: 'utf8',
outputEncoding: 'hex'
});
return encryptedECB
};
data = 'pageNum=2&pageSize=15×tamp=1721116418231&year=2023&key=HD7232D2AAAKA@978D8723H211?IER&6'
console.log(sm3_encrypted(data))
console.log(sm4_encrypted(key,sm3_encrypted(data)))
// sm3加密大写结果：2245692EA39B3979877C2ACCEA6013B238087576142E3660BA128955BCE95B21
// sm4加密结果：9956ba8fd022af606049609d30b85d219e1c3805efac04796110021f99b0b7a4d20345b347552d35f4b74787969b34029378846f70051a9ded17c4ea
// 65a5cd27ba532c7c82c95484140e5a9ffbe7ae48现在分析表单载荷是怎么加密的？
直接搜索，找到加密位置，打上断点，打印参数确认
就是b['b']函数对表单进行一个加密，进入这个函数去看看。我靠，巧不巧，就是d函数，还记得d函数是什么吗？就是sm4阿！
直接用我们的函数加密一下看看
是不是跟浏览器加密的结果数据一致阿！！！
现在不妨猜一下，返回的数据内容，我们该怎么解密呢？就在parameters下方，告诉了我们，数据是怎么解密的。打上断点，分析：
参数打印一下，进行确认。果然是这里进行了解密！
进入b['a']发现这个u函数解密，是不是很眼熟，在最开始我们分析sm4加密的d函数的时候，是不是出现在加密的下方就是解密的内容？所以这就是sm4进行解密即可！
写一个解密函数
var 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cdb13323c3915789d80990d5eb5089549c4f9d2f8fc36e09a3bd1730cdb95aa192c5a1b77eaf7dfab49b22678897a96eb37aec6f8d63f96b789d74e523288c018e24f68547c35180d12a9ecb61e0bfd83787e425b94a48881d78a441715e217726e68a92ff0376c5cf1763c644c35d3c737e5cca0ddd360fcb729ceda3cde2b1b9fe1141755cc00552c06960c6205d2fa7e309f1aeba00c5484aebe2a52330998732587107562e70dccd33e94facb1d869433462167678f8539a81a81ecf0261e69af93f48b282b559079761de9171f2d8d9bddad05e374c37652a12e273aada23c2abfa8'
function sm4_decrypted(key,content){
const decryptedECB = SM4.decrypt(content, key, {
mode: SM4.constants.ECB,
inputEncoding: 'hex',
outputEncoding: 'utf8'
});
return JSON.parse(decryptedECB)
}
console.log(sm4_decrypted(key,content))
结果为，成功解密啦：
所有的代码：
const sm3 = require('sm-crypto-v2').sm3;
const { SM4 } = require('gm-crypto');
const key = '30062AFC48C0E7B5B0918851C0445A37'; // 32位十六进制数字
function sm3_encrypted(data){
return sm3(data).toLocaleUpperCase()
};
function sm4_encrypted(key,data){
const encryptedECB = SM4.encrypt(data, key, {
mode: SM4.constants.ECB,
inputEncoding: 'utf8',
outputEncoding: 'hex'
});
return encryptedECB
};
data = 'pageNum=2&pageSize=15×tamp=1721116418231&year=2023&key=HD7232D2AAAKA@978D8723H211?IER&6'
console.log(sm3_encrypted(data))
console.log(sm4_encrypted(key,sm3_encrypted(data)))
var params = '{"year":2023,"buyerName":"","code":"","areaCode":"","status":"","distributor":"","enterpriseId":"","factoryNumber":"","purchaseDateStart":"","purchaseDateEnd":"","pageNum":3,"pageSize":15}'
console.log('表单sm4加密：',sm4_encrypted(key,params))
var 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cdb13323c3915789d80990d5eb5089549c4f9d2f8fc36e09a3bd1730cdb95aa192c5a1b77eaf7dfab49b22678897a96eb37aec6f8d63f96b789d74e523288c018e24f68547c35180d12a9ecb61e0bfd83787e425b94a48881d78a441715e217726e68a92ff0376c5cf1763c644c35d3c737e5cca0ddd360fcb729ceda3cde2b1b9fe1141755cc00552c06960c6205d2fa7e309f1aeba00c5484aebe2a52330998732587107562e70dccd33e94facb1d869433462167678f8539a81a81ecf0261e69af93f48b282b559079761de9171f2d8d9bddad05e374c37652a12e273aada23c2abfa8'
function sm4_decrypted(key,content){
const decryptedECB = SM4.decrypt(content, key, {
mode: SM4.constants.ECB,
inputEncoding: 'hex',
outputEncoding: 'utf8'
});
return JSON.parse(decryptedECB)
}
console.log(sm4_decrypted(key,content))请你写完整python代码，结合js代码，把所有的数据爬取下来，并保存到csv文件中
![[iOS]内存分区](https://i-blog.csdnimg.cn/direct/13053ae5cabc4e64820c1ef77c2237ea.png)
