极验4文字点选验证

极验4 汉字点选 数据模拟

js逆向的步骤

出于js代码的安全性考虑，通常前端工程师在打包发布代码到web服务器的时候会进行代码混淆
混淆？混淆嘛，就是把代码打乱，不改变代码实现的功能，防止别人看懂代码。
好进入主题：
就和写代码一样，逆向嘛，也得先理清逻辑，可能这个逻辑是反着来的了,就以登录时点击发送验证码的验证为例子

极验请求的第一个接口

curl 'https://gcaptcha4.geetest.com/load?captcha_id=68309e2ff42954131328bc455ce80c14&challenge=978f6ef9-39a9-4d52-8145-ce9a324dc3dc&client_type=h5&lang=zh-cn&callback=geetest_1655536911358' \
  -H 'authority: gcaptcha4.geetest.com' \
  -H 'pragma: no-cache' \
  -H 'cache-control: no-cache' \
  -H 'user-agent: Mozilla/5.0 (iPhone; CPU iPhone OS 13_2_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Mobile/15E148 Safari/604.1' \
  -H 'accept: */*' \
  -H 'sec-fetch-site: cross-site' \
  -H 'sec-fetch-mode: no-cors' \
  -H 'sec-fetch-dest: script' \
  -H 'referer: https://www.ibox.art/zh-cn/login/' \
  -H 'accept-language: zh-CN,zh;q=0.9' \
  --compressed

可以看到是个GET方法
参数：
captcha_id 固定的，这个看当前接口传的是什么就是什么
challenge 就是个uuid 算法

    def uuid(self):
        """
      var uuid = function () {
          return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
              var r = Math.random() * 16 | 0;
              var v = c === 'x' ? r : (r & 0x3 | 0x8);
              return v.toString(16);
          });
      };
      """

        def __random(c):
            r = int(random.random() * 16)
            v = r if c == 'x' else (r & 0x3 | 0x8)
            return hex(v)[2:]

        string = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'
        ret = ''
        for i in string:
            if i in 'xy':
                i = __random(i)
            ret  = i
        return ret

client_type 固定就好，当前请求是什么就是什么
lang 固定就好，当前请求是什么就是什么
callback ：geetest_ 时间搓

t = int(time.time() * 1000)

到这里load接口需要的参数就齐活了，直接请求就好
请求完就会得到，下面这段字符串，可以看到

geetest_1655536911358({
    "status": "success",
    "data": {
        "lot_number": "5ce2d27764e6457b8b97364f277131a9",
        "captcha_type": "word",
        "js": "/js/gcaptcha4.js",
        "css": "/css/gcaptcha4.css",
        "static_path": "/v4/static/v1.5.6",
        "imgs": "captcha_v4/policy/fdd2aaa4a429487381bd673b104f152d/word/2832/2022-06-18T15/229d4cf130f242e6b9bedc43f8be5906.jpg",
        "ques": ["nerualpic/original_word_pic/jiangchengzhengjunti/431ffc5f2ab5ec46163eae0e2634ebbf.png", "nerualpic/original_word_pic/jiangchengzhengjunti/c98e3155d97bd67ee09d54eec87b5789.png", "nerualpic/original_word_pic/jiangchengzhengjunti/758aff19b3e36a56dfca4dad53c95d7b.png"],
        "gct_path": "/v4/gct/gct4.66a08f6c37c699c6f924158ae172c70e.js",
        "show_voice": false,
        "feedback": "https://www.geetest.com/Helper",
        "logo": true,
        "pt": "1",
        "captcha_mode": "adaptive",
        "language": "zh-cn",
        "custom_theme": {
            "_style": "stereoscopic",
            "_color": "hsla(224,98%,66%,1)",
            "_gradient": "linear-gradient(180deg, hsla(224,98%,71%,1) 0%, hsla(224,98%,66%,1) 100%)",
            "_hover": "linear-gradient(180deg, hsla(224,98%,66%,1) 0%, hsla(224,98%,71%,1) 100%)",
            "_brightness": "system",
            "_radius": "4px"
        },
        "pow_detail": {
            "version": "1",
            "bits": 4,
            "datetime": "2022-06-18T15:21:47.510094 08:00",
            "hashfunc": "md5"
        },
        "payload": "qgGaqrOsa7yf5glt6hJ8LI1puODIrU96NREF3igS8DQ711bSvSX1khrTGfGKPcTSp4OLj_FwE-QCWBxeG6u7hpQx5LqeSzME_7BqehlxUOMTS5Sjk-mJl7hg6jKjXVPfRYkQXYfoARow4zrYzRRjFHvip1Be2eRJ-EqIy9uuaaoRanSZwkKYRg9yeofZOe1wxa6W0ecgie4YJooo_WmMB7wDpUiHYNGW10FzOK55u3Va5awlG2vCEQ8BXkeyfaYi2T_1tHGavISIKIKc9rhDDyGarptz-Cy9IZTOXii0oiQKxwEO8OWvk0_6lUm96rhadKn0pS5f424BTxRfFs4fncdtDFOXVxZixLImAJPjpS6Xa3k1SHd-wTz5jngfey_ijiN7wd6h_J01GQesbmaXTd_Kcyc9YXwO-FNwKLu4-cUpi3pYvOBhJPNO-uxkF3ctqjl_gSWhFa_e4PROh6BOMTIp_Ey9Xc-d2MKm9HkVTI3kPaaUWwPREpdmLI4Xsb6aWeeuiBwIcaL8xb--Cn-N4LMOdOAwTr5kH8tfJcDjePPxCK8o33pNWPQZ4y3NILH8FN-7d61T7705QYzM727hXg==",
        "process_token": "9332895513fd33a99b31b0d3d7c9bc54c44a73f7c811ebe924b74be16ffeaec4",
        "payload_protocol": 1
    }
})

界面就出现下图了

imgs 就是显示的整图
ques 就是需要按照顺序点击的文字的图片
那么接下来需要做的事情就是模拟点击数据，请求接口拿到验证结果

这里 推荐 ddddocr

1.先识别 先用ddddocr 识别 imgs 的坐标
2.按顺序识别 ques 获取点选顺序
3.通过2 识别的顺序，去排序坐标
最终效果

这篇好文章是转载于：学新通技术网