文章目錄

• • 聲明
  • 逆向目標
  • 逆向過程
  • • 抓包分析
    • 參數逆向
  • 完整代碼
  • • fang_encrypt.js
    • fang_login.py

---

聲明

本文章中所有內容僅供學習交流，嚴禁用于商業用途和非法用途，否則由此產生的一切后果均與作者無關，若有侵權，請聯系我立即刪除！

逆向目標

• 目標：房天下賬號密碼登錄

• 主頁：https://passport.fang.com/

• 接口：https://passport.fang.com/login.api

• 逆向參數：

  Form Data：

  pwd: 044b527dba64d1e82657668beae1d61e4d86643d231792c78d5c538461a146b01c8e28d98b14915a11758deb6095aba16688a07427150434681949529f02e808e8891e1f90b5c91d42058a83f2c6902bd69825577dc4efb993f1aa4c9bb43a2bbe1acad5781a8738614ddafbda3cca99a0c03fb634d8e1001f25bca59a8d421b`

逆向過程

抓包分析

隨便輸入一個賬號密碼，點擊登陸，抓包定位到登錄接口為 https://passport.fang.com/login.api ，POST 請求，Form Data 里，密碼 pwd 被加密處理了。

參數逆向

加密參數只有一個 pwd，直接全局搜索，出現一個 loginbypassword.js，很明顯就是加密的 JS，這個 JS 貼心的寫上了中文注釋，直接來到登錄模塊，埋下斷點：

uid: that.username.val(), pwd: encryptedString(key_to_encode, that.password.val()), Service: that.service.val(), AutoLogin: that.autoLogin.val()

encryptedString 這個函數可以看到在一個叫做 RSA.min.js 的加密 JS 里，很明顯的 RSA 加密，直接 copy 下來就好了，key_to_encode 這個參數可以直接在首頁搜到，可以看到是向 RSAKeyPair 函數傳入參數得到的：

完整代碼

以下只演示部分關鍵代碼，完整代碼可在 GitHub 下載：https://github.com/kgepachong/crawler

fang_encrypt.js

function setMaxDigits(n) {}function BigInt(n) {}function biFromDecimal(n) {}// 此處省略 N 個函數function twoDigit(n) {}function encryptedString(n, t) {}function decryptedString(n, t) {}var biRadixBase = 2, biRadixBits = 16, bitsPerDigit = biRadixBits, biRadix = 65536, biHalfRadix = biRadix >>> 1,biRadixSquared = biRadix * biRadix, maxDigitVal = biRadix - 1, maxInteger = 9999999999999998, maxDigits, ZERO_ARRAY,bigZero, bigOne, dpl10, lr10, hexatrigesimalToChar, hexToChar, highBitMasks, lowBitMasks; setMaxDigits(20); dpl10 = 15; lr10 = biFromNumber(1e15); hexatrigesimalToChar = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"]; hexToChar = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"]; highBitMasks = [0, 32768, 49152, 57344, 61440, 63488, 64512, 65024, 65280, 65408, 65472, 65504, 65520, 65528, 65532, 65534, 65535]; lowBitMasks = [0, 1, 3, 7, 15, 31, 63, 127, 255, 511, 1023, 2047, 4095, 8191, 16383, 32767, 65535]; setMaxDigits(129);function getEncryptedPassword(pwd, n, i, t) {var key_to_encode = new RSAKeyPair(n, i, t);return encryptedString(key_to_encode, pwd) }// 測試樣例 // console.log(getEncryptedPassword("16521689404", "010001", "", "978C0A92D2173439707498F0944AA476B1B62595877DD6FA87F6E2AC6DCB3D0BF0B82857439C99B5091192BC134889DFF60C562EC54EFBA4FF2F9D55ADBCCEA4A2FBA80CB398ED501280A007C83AF30C3D1A142D6133C63012B90AB26AC60C898FB66EDC3192C3EC4FF66925A64003B72496099F4F09A9FB72A2CF9E4D770C41"))

fang_login.py

#!/usr/bin/env python3 # -*- coding: utf-8 -*-import reimport execjs import requestsindex_url = 'https://passport.fang.com/' login_url = 'https://passport.fang.com/login.api' user_agent = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36' session = requests.session()def get_key_to_encode():headers = {'User-Agent': user_agent}response = session.get(url=index_url, headers=headers)key_to_encode = re.findall(r'RSAKeyPair\((.*)\);', response.text)[0].replace('"', '').split(', ')return key_to_encodedef get_encrypted_password(key_to_encode, pwd):n, i, t = key_to_encode[0], key_to_encode[1], key_to_encode[2]with open('fang_encrypt.js', 'r', encoding='utf-8') as f:fang_js = f.read()encrypted_pwd = execjs.compile(fang_js).call('getEncryptedPassword', pwd, n, i, t)return encrypted_pwddef login(encrypted_password, uid):headers = {'User-Agent': user_agent,'X-Requested-With': 'XMLHttpRequest','Host': 'passport.fang.com','Origin': 'https://passport.fang.com','Referer': 'https://passport.fang.com/?backurl=http%3a%2f%2fmy.fang.com%2f','sec-ch-ua': '" Not;A Brand";v="99", "Google Chrome";v="91", "Chromium";v="91"','Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8'}data = {'uid': uid,'pwd': encrypted_password,'Service': 'soufun-passport-web','AutoLogin': 1}response = session.post(url=login_url, data=data, headers=headers)print(response.json())def main():# 16521689404uid = input('請輸入登錄賬號：')pwd = input('請輸入登錄密碼：')rsa_key = get_key_to_encode()encrypted_pwd = get_encrypted_password(rsa_key, pwd)login(encrypted_pwd, uid)if __name__ == '__main__':main()

總結

以上是生活随笔為你收集整理的【JS 逆向百例】房天下登录接口参数逆向的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。