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原創文章,請勿轉載!
本文內容僅限於安全研究,不公開具體原始碼。維護網路安全,人人有責。
本文配合《第三代驗證碼研究》《極驗無感驗證破解》服用效果更好,能更全面體會安全產品的設計。
本文主要通過破解協議的方式繞過極驗安全驗證,思路與網上自動化的方式有很大的不同
一、完整流程
1、極驗官網完整流程
一、例項研究
我們以春秋航空註冊場景的驗證碼為研究物件
1、例項研究地址
https://account.ch.com/NonRegistrations-Regist
2、例項研究場景
二、請求分析
1、網路請求抓包
從網路抓包結果可以看到,整個極驗驗證碼與極驗伺服器一共互動了8次。要想破解極驗驗證碼,首先我們就需要搞清楚每次請求都攜帶了哪些引數,其次就是引數如何生成的?只有搞明白每個引數的意義,後續我們才能夠通過偽造引數以達到破解的目的。
2、資料說明
在分析極驗請求前,需要先解釋說明兩個引數。
(1)gt:極驗為每個使用方提供一個唯一身份標識用於進行服務區分
(2)challenge:用於請求串聯,我們都知道http是無狀態的,有了challenge就能把各個請求串聯起來。(注意:challenge是會發生改變的,記得及時更換)
3、請求分析
請求1:gt.js
(1)請求介紹
關於第一個請求,在極驗的官方文件已經給我們介紹了(https://docs.geetest.com/sensebot/deploy/client/web)。gt.js
檔案用於載入對應的驗證JS庫。
(2)關鍵程式碼
Config.prototype = {
api_server: 'api.geetest.com',
protocol: 'http://',
typePath: '/gettype.php',
fallback_config: {
slide: {
static_servers: ["static.geetest.com", "dn-staticdown.qbox.me"],
type: 'slide',
slide: '/static/js/geetest.0.0.0.js'
},
fullpage: {
static_servers: ["static.geetest.com", "dn-staticdown.qbox.me"],
type: 'fullpage',
fullpage: '/static/js/fullpage.0.0.0.js'
}
},
_get_fallback_config: function () {
var self = this;
if (isString(self.type)) {
return self.fallback_config[self.type];
} else if (self.new_captcha) {
return self.fallback_config.fullpage;
} else {
return self.fallback_config.slide;
}
},
_extend: function (obj) {
var self = this;
new _Object(obj)._each(function (key, value) {
self[key] = value;
})
}
};
解釋說明
(1)正常請求會傳送gettype.php請求
# Request URL
https://api.geetest.com/gettype.php?gt=25ba81caec944f8d74c98befd841a667&callback=geetest_1605974702024
# Query String Parammeters
gt: 25ba81caec944f8d74c98befd841a667
callback: geetest_1605974702024
(2)兜底策略
如果發生異常情況,極驗伺服器無法響應。這時就會傳送http://static.geetest.com/static/js/geetest.0.0.0.js
獲取能夠在本地驗證的js檔案,確保應用服務正常執行。具體可以參考我的另一篇部落格《極驗無感驗證破解》https://www.cnblogs.com/boycelee/p/13951819.html
請求2:gettype.js
(1)請求介紹
該請求的目的是獲取極驗安全的核心js檔案/static/js/fullpage.9.0.2.js
和極驗提供的各型別驗證碼對應的js檔案。
(2)請求詳情
# Request URL
https://api.geetest.com/gettype.php?gt=25ba81caec944f8d74c98befd841a667&callback=geetest_1605974702024
# Query String Parammeters
gt: 25ba81caec944f8d74c98befd841a667
callback: geetest_1605974702024
# Response
geetest_1605974702024({status: "success",…})
data: {type: "fullpage", voice: "/static/js/voice.1.2.0.js", maze: "/static/js/maze.1.0.1.js",…}
aspect_radio: {slide: 103, voice: 128, click: 128, pencil: 128, beeline: 50}
beeline: "/static/js/beeline.1.0.1.js"
click: "/static/js/click.2.9.4.js"
fullpage: "/static/js/fullpage.9.0.2.js"
geetest: "/static/js/geetest.6.0.9.js"
maze: "/static/js/maze.1.0.1.js"
pencil: "/static/js/pencil.1.0.3.js"
slide: "/static/js/slide.7.7.5.js"
static_servers: ["static.geetest.com/", "dn-staticdown.qbox.me/"]
type: "fullpage"
voice: "/static/js/voice.1.2.0.js"
status: "success"
請求3:fullpage.js
請求介紹
該js檔案就是極驗驗證碼的核心檔案,其主要功能是指紋資料、環境檢測資料收集。獲取js檔案可以通過https://static.geetest.com/static/js/fullpage.9.0.2.js
得到。
請求4:get.php
(1)請求介紹
該請求主要傳送的內容是通過執行fullpage.js檔案收集的瀏覽器資料,用於後續裝置指紋計算以及初步風險檢測。如果該請求偽造得足夠好,就會觸發無感驗證
(2)關鍵步驟
流程圖
a、資料收集
瀏覽器資料:js檔案元素、瀏覽器大小、瀏覽器外掛、canvas、字型、時區等資料
{
textLength,
HTMLLength,
documentMode,
A,
IMG,
INPUT,
LINK,SPAN,
STYLE,
screenLeft,
screenTop,
screenAvailLeft,
screenAvailTop,
innerWidth,
innerHeight,
outerWidth,
outerHeight,
browserLanguage,
browserLanguages,
devicePixelRatio,
colorDepth,
userAgent,
screenWidth,
screenHeight,
screenAvailWidth,
screenAvailHeight,
localStorageEnabled,
sessionStorageEnabled,
indexedDBEnabled,
platform,
doNotTrack,
timezone,
canvas2DFP,
canvas3DFP,
plugins,
maxTouchPoints,
flashEnabled,
javaEnabled,
hardwareConcurrency,
jsFonts,
timestamp,
performanceTiming
...等等(不完全暴露,以免被有心人利用)
};
b、格式處理
在每個收集的資料中間,通過“!”感嘆號來對資料進行切割。
c、請求引數構造
{
gt: gt,
challenge: challenge,
new_captcha: true,
protocol: https == true ? "https://" : "http://",
beeline: scriptInfo.beeline,
fullpage: scriptInfo.fullpage,
static_servers: scriptInfo.static_servers,
pencil: scriptInfo.pencil,
click: scriptInfo.click,
voice: scriptInfo.voice,
slide: "/static/js/slide.7.7.5.js",
geetest: "/static/js/geetest.6.0.9.js",
https: https,
i: # 收集的瀏覽器資料
}
d、明文請求引數加密
使用對稱加密演算法對上述明文引數進行加密(可能是AES)。
e、構造密文請求引數
gt: 25ba81caec944f8d74c98befd841a667
challenge: 61f4492c9e8ea1e136e98b38107d561e
lang: zh-cn
pt: 0
client_type: web
w: Wt(lNJWNy9DeW5Z6nJck3NZCQaoyQdi3TTcxtdnFpU65OTMLZvjnrK9bgDx94DdhAlV0bvg61eh)qX0m(bWYmvFzG84QiCW7S5tLICB4QMC(zoR0YLHui9VVj6iJwWEK9lFIqklAGbsFUYHM3GEGr6mrnflcVvbIyyo8SJGIF4j70VqCLwmmcChYl4TX9GZQb0pN0)dJHSIJucHlyrrxhSpqk4b(ox65Ur4IX)De0of3r6WB78QI7)XNqxKheWL(L7peMT)f(bIl6ut5S1gO7d9dRSSZac9SjtQGUfXPNHtbm1tOts(zRdjihk8z)Zfsh)JFqM4QQgrhnd6wBOQ8pyv60bjgpONQeJdKnNBIb(SXgo)flKztgLn1cehGDcCTTQcNlnWi5E7R)(5X01pqSyc16(8YSj)CXk2T6JHUXCXXFAXrSFWs7noM4IR7KUawc1KLmu4lDLA913wOOGoCv5C06D4D48IkVeDIalagtcLwMVd(S7TAVVwWtxXXzsnxLipWbB9HjYSiYPeg3YzjvnJpbV)oDukpEkYkl2kjs53ucZ8jo33(QE09ubUvMLgQuHwIWOoqaO5VJ4ESffY)87yPJrLJprSRUTYHmuTAo6yyI0OeQGk5CHxx67iHrgzHnNxAAPZY5yrv)CJ3xcBhZgu0tk8lCYgiH1wbigIChhPgd5QTP0nJiOJPgQs76yVkvX7bLEMWJfWjLqIzZ1hd9XQmt)2yGvVLC0iiApcqGuKSvRhxvVrW01WPp6pzFOywFXULhI7vsqUOTvqoNnwJtnSv1b40F)F2y6lC8LRsj1AKBcxREtAtqKvpXOcCFPxT2qMdLKgISgYJ33RVknFDS4JfOhTk9AgXBFtSJ2zM7tpPROoRoBsPVMOrbO)mdip4Z62PxxSDS8cA0PW980wi6ZhaDamumAlxx8RQKLPW587)9Xehn5s6cIMdMFRIAubg0VXlnW5Us2IvKeI6cjEfHNMyCJz4Fmv3)IYsXh3iigq87dCjtkGlGiVTrjjo2q44e(qr0GAo5CrxuKO)EgbdLDAyqf)5WFlSx)VXn5UoZF(AunphgVIn4(vMeFVWN(fWYj(MKztePyzCi2Cdd3pLrrL2IrD7NvNo87wvdX6ro5Q6GVVHP14IvrQsArUDdnIZjz5kMJ0IG0rsd2oQL2XFndtTcuJNlRewL5KYai(K2uPNjCQmXLfEfH2LMIjerHM126aAv5EhwLuFhvxKhIjoEGoQqMGg3FZorOHWIJEt6jSDtKNwLeeUXomknlRtaVwVCJJkrR9MfM8vldLCZ..e581bf73fb48171a223c9fac8fc74f151438380e515f1775cb26d78086253beef82f250f02349285fd86ed2d52d0acb6f45fa1733340ea282c3524c432d93df20d22b28c2c382e1ad52d72b20fcc2104188b7e99d11ca440325cb4391e34d78f2122162d3e3fb3efa810139c6d1f933b1dacfdc1e044686369271275d2ac258a
w引數:步驟4中對稱加密後的資料(gt、chanllenge、瀏覽器資料、驗證碼js路徑)+ 使用非對稱加密對“對稱加密金鑰”進行加密後的加密串
f、返回資料
geetest_1605981310309({
"status": "success",
"data": {
"logo": false,
"s": "73304840",
"i18n_labels": {
"read_reversed": false,
"copyright": "\u7531\u6781\u9a8c\u63d0\u4f9b\u6280\u672f\u652f\u6301",
"goto_confirm": "\u524d\u5f80",
"ready": "\u70b9\u51fb\u6309\u94ae\u8fdb\u884c\u9a8c\u8bc1",
"goto_homepage": "\u662f\u5426\u524d\u5f80\u9a8c\u8bc1\u670d\u52a1Geetest\u5b98\u7f51",
"next": "\u6b63\u5728\u52a0\u8f7d\u9a8c\u8bc1",
"next_ready": "\u8bf7\u5b8c\u6210\u9a8c\u8bc1",
"loading_content": "\u667a\u80fd\u9a8c\u8bc1\u68c0\u6d4b\u4e2d",
"success": "\u9a8c\u8bc1\u6210\u529f",
"fullpage": "\u667a\u80fd\u68c0\u6d4b\u4e2d",
"reset": "\u8bf7\u70b9\u51fb\u91cd\u8bd5",
"goto_cancel": "\u53d6\u6d88",
"refresh_page": "\u9875\u9762\u51fa\u73b0\u9519\u8bef\u5566\uff01\u8981\u7ee7\u7eed\u64cd\u4f5c\uff0c\u8bf7\u5237\u65b0\u6b64\u9875\u9762",
"success_title": "\u901a\u8fc7\u9a8c\u8bc1",
"error_content": "\u8bf7\u70b9\u51fb\u6b64\u5904\u91cd\u8bd5",
"error": "\u7f51\u7edc\u4e0d\u7ed9\u529b",
"error_title": "\u7f51\u7edc\u8d85\u65f6"
},
"static_servers": ["static.geetest.com", "dn-staticdown.qbox.me"],
"theme": "wind",
"feedback": "",
"c": [12, 58, 98, 36, 43, 95, 62, 15, 12],
"api_server": "api.geetest.com",
"theme_version": "1.5.8"
}
})
g、無感驗證
如果該請求偽造的瀏覽器資訊足夠好,就會觸發無感驗證,不需要進行加強驗證。
# Response
geetest_1606035710872({status: "success", data: {s: "6b402d61", theme: "wind", api_server: "api.geetest.com",…}})
data: {s: "6b402d61", theme: "wind", api_server: "api.geetest.com",…}
api_server: "api.geetest.com"
c: [12, 58, 98, 36, 43, 95, 62, 15, 12]
feedback: ""
i18n_labels: {success_title: "通過驗證", refresh_page: "頁面出現錯誤啦!要繼續操作,請重新整理此頁面", ready: "點選按鈕進行驗證", next: "正在載入驗證",…}
logo: false
s: "6b402d61"
static_servers: ["static.geetest.com", "dn-staticdown.qbox.me"]
theme: "wind"
theme_version: "1.5.8"
status: "success"
請求5:ajax.php
(1)請求介紹
a、請求詳情
# Request URL
https://api.geetest.com/ajax.php?
# Query String Parameters
gt: 25ba81caec944f8d74c98befd841a667
challenge: f91e9b5f7cb34fc2fef98a1281c4f9a5
lang: zh-cn
pt: 0
client_type: web
w: PN3AyfkANbA5SEGeV3zj3wrdYwzvdZZw0hxaGHTXJUKFj7oeqLehkFa0c2Wma0D)DkvqU4xfIcbZGjnFyBK0NQ7VFAKCE(BnrKk5RDHCLXGrU3jkPh1pPGCXxywO2y2gg332yjxU7Wk7ZZzYroMNgrNZdc4ebUioVkgivWUbGFSEOBLPBPtU3Mg56FixAAO8jr1VsKXQsJFbmmMeGZ)QgmtJ9xUOhmFXjBNIbfVlsxvFljpNYaGrYxb7jV8(PhtHROTS37gGcpBoLuCXJo1iSHXEPixniDFZoQYt8r9gxFiK)CTPgwmiqXHeg0mkCQTxUTDr1)fVw9(1DCVTOXgXwCQ3LDIfdmi7bTNOqOf2F)8kXGv8g8cvMcSxkoAK(FWIblKoHjk4BT(thhJG4oyphzxQkRFLjXKE8aEmBI1Wn3legt66SGj3zZJk94OyWrkEWLyK2YnT7SYS1KVjj1Gd81mZlVA5P5sfnhZl72IRuaLGWn4jIFJhcd0dAZs5sTrIXzMpmoInN6TvMHTlux3oHs3c6l8TUPExxMoQ6oMLVAi6IZM0hrUDozyrWRJ8UT6KaeKBIgruAM)YXdQCGM4zDzL0fPwzTJC3cmlBLFmuGE(hAxbBzCuuyD8)7g2no7n0okLw9tpovsBaISZLH8pP4ujt05oz0ekEYnYZloSgQFTs40s(31TB8Pg5IO7Mg83WqgvDhKH1t1nsgqtwEmOuP6ra1yV6UHqqcg1MoPb2Rk5IbXws)utkSbrfLBlEYKVNuCqIuTqr9pvvhnHSeD5Y7pJYLBqS6sWCNQo8H()S8bQ)R2n0j8kAGUnJ27tIHzVKJE3BiO5ZO4WudFKpcqQVffhPpjtzl(f65)nLI5Hd0X7MLpXbUR36DC7FkTHwlVR4jMh3s2MboNIhpxuzzDgNzxwH9gmlgPpL3eU0s2UYGUY5L94DWTNktRlTaVEGNdpDAIoaoVKC6uf2wBJvwZh0TWrhGr2PdHiBpcmJYXlDpH0csf5PTGyBHxcNv0(AiOoKsYc0xcaLUJq)OlFBzErRIbxTnG1bfB4u1KG9vBs)qxGqux7n8DfIQ8tQCswqKk(5Yr7fnGTlO6zGlPmMQdcSfuCasd9T573MrZsIc(sX)VC5wc4Rd2BI31RVbu6P7DhQBnt)1IPPLKOmNo)liGCgG9PaFyAX(TJvyD5DDKDE)0fAbl7DD2i9NBW)Eoq9lVDalE(F8xxnlVxfQCJP)CyJEG8F0SxJo4AG6kQF(JFOEn8zH)UDbeYz1tgOWEcO0hDTdlmOIEVP1Ipmrpa95bQm4lSlbtE(vFjy2NrWt1AN)fyAgIvWaQH9bypqoUinzSxK4DJlaipaMee3Z9odzZw9aB5z9KaEixqDrCsf7H7Nfus.
callback: geetest_1605981541804
# Response
geetest_1605981541804({"status": "success", "data": {"result": "slide"}})
問題:w引數如何生成?
(2)關鍵步驟
a、資料收集
瀏覽器資料:再一次收集“請求4”中的瀏覽器資料。
b、格式處理
(1)在每個收集的資料中間,通過“!”感嘆號來對資料進行切割。
(2)在每個收集的資料中間,通過“magic”來對資料進行切割。例子:11078magic data34095magic dataCSS1Compatmagic data168magic data-1magic data-1magic data-1magic
此處相對於“請求4”有點不一樣,為什麼一份資料要用兩種方式進行切割,請求4與請求5都傳送一遍,我也沒想明白。
c、滑鼠資料收集
資料格式:行為 + x座標 + y座標 + 時間戳 + 行為
var pointArray = [["move",900,400,1552388419164,"pointermove"],["move",904,397,1552388419180,"pointermove"],["move",911,381,1552388419195,"pointermove"],["move",916,379,1552388419210,"pointermove"],["move",923,377,1552388419225,"pointermove"],["move",930,373,1552388419240,"pointermove"],["move",937,369,1552388419256,"pointermove"],["move",942,366,1552388419271,"pointermove"],["move",949,364,1552388419287,"pointermove"],["move",953,362,1552388419302,"pointermove"],["move",957,360,1552388419318,"pointermove"],["move",961,356,1552388419333,"pointermove"],["move",966,352,1552388419349,"pointermove"],["move",973,350,1552388419364,"pointermove"],["move",978,348,1552388419380,"pointermove"],["move",983,345,1552388419396,"pointermove"],["move",990,343,1552388419411,"pointermove"],["move",994,340,1552388419427,"pointermove"],["move",999,336,1552388419442,"pointermove"],["down",1059,411,1552388422125,"pointerdown"],["focus",1552388422126],["up",1059,411,1552388422375,"pointerup"]];
d、s與c引數加密
s引數與c引數是“請求4返回的”,我的理解是與s引數是“請求4”進行繫結而c引數是圖片順序(從極驗伺服器返回的圖片是被無規則切割後的,我們需要c引數配合演算法還原)
e、上述引數各種加密後進行再一次加密
f、生成最終w引數
與“請求4”中的w引數加密方法相同。
w引數:(gt, challenge, ip, version, c, s, 瀏覽器資訊, 滑鼠軌跡)對稱加密 + 使用非對稱加密對“對稱加密金鑰”進行加密後的加密串
g、資料結構圖
此處加密結構實在是太過於冗餘,所以用圖的方式更清晰。
請求6:slide.js
請求介紹
“請求5”中Response返回資料geetest_1605981541804({"status": "success", "data": {"result": "slide"}})
表明,使用滑塊進行加強驗證。後續進行滑塊驗證碼驗證時,會使用該js進行資料收集與加密處理。
請求詳情
# Request URL
https://static.geetest.com/static/js/slide.7.7.5.js
# Response
返回滑塊驗證相關js程式碼
請求7:get.php
(1)請求介紹
獲取驗證碼相關資訊,例如圖片路徑、圖片還原陣列,請求串聯引數challenge、y座標等資料。
(2)請求詳情
geetest_1605982735902({
"hide_delay": 800,
"static_servers": ["static.geetest.com/", "dn-staticdown.qbox.me/"],
"logo": false,
"https": true,
"width": "100%",
"feedback": "",
"product": "embed",
"so": 0,
"ypos": 37,
"link": "",
"version": "6.0.9",
"fullbg": "pictures/gt/7d068eca5/7d068eca5.jpg",
"clean": false,
"height": 160,
"xpos": 0,
"theme_version": "1.2.4",
"id": "aa812df54ff9aee0ddb35400abe906992",
"gt": "25ba81caec944f8d74c98befd841a667",
"s": "476e6b52",
"api_server": "https://api.geetest.com/",
"slice": "pictures/gt/7d068eca5/slice/b5afeb19a.png",
"i18n_labels": {
"logo": "\u7531\u6781\u9a8c\u63d0\u4f9b\u6280\u672f\u652f\u6301",
"cancel": "\u53d6\u6d88",
"close": "\u5173\u95ed\u9a8c\u8bc1",
"error": "\u8bf7\u91cd\u8bd5",
"feedback": "\u5e2e\u52a9\u53cd\u9988",
"voice": "\u89c6\u89c9\u969c\u788d",
"success": "sec \u79d2\u7684\u901f\u5ea6\u8d85\u8fc7 score% \u7684\u7528\u6237",
"tip": "\u8bf7\u5b8c\u6210\u4e0b\u65b9\u9a8c\u8bc1",
"read_reversed": false,
"refresh": "\u5237\u65b0\u9a8c\u8bc1",
"fail": "\u8bf7\u6b63\u786e\u62fc\u5408\u56fe\u50cf",
"forbidden": "\u602a\u7269\u5403\u4e86\u62fc\u56fe\uff0c\u8bf7\u91cd\u8bd5",
"loading": "\u52a0\u8f7d\u4e2d...",
"slide": "\u62d6\u52a8\u6ed1\u5757\u5b8c\u6210\u62fc\u56fe"
},
"theme": "ant",
"bg": "pictures/gt/7d068eca5/bg/b5afeb19a.jpg",
"mobile": true,
"challenge": "a812df54ff9aee0ddb35400abe906992lw",
"show_delay": 250,
"benchmark": false,
"type": "multilink",
"fullpage": false,
"template": "",
"c": [12, 58, 98, 36, 43, 95, 62, 15, 12]
})
請求8:ajax.php
(1)請求介紹
該請求就是最重要的一步,驗證碼驗證資料收集,主要收集資料包括滑塊相對偏移位置(x座標)、滑鼠滑動軌跡、c引數、s引數、版本資訊等。
(2)請求詳情
# Request URL
https://api.geetest.com/ajax.php?
# Query String Param
gt: 25ba81caec944f8d74c98befd841a667
challenge: a812df54ff9aee0ddb35400abe906992g1
lang: zh-cn
pt: 0
client_type: web
w: 01xw)7RkAQTxgt5(KAirHJNk(GQHPSqovqV(huofhVj6LOrChUNg6NV)sMQYfBVZFGoug6B7VB0X)0rw3kI3rEXkMGOk1ewLqxZTVSDud7N6ryucakpAMXzhXRimQa4vPmjYz1nus80DQKvG7iq6XPSbdFxARitg0b4TIcRgX(3AOGK)V2cujs6ExkH7puvD9M8887mK6lCSee6FfBXrO2PdgmlamfM8omcLDwkDECw4g9fODBjYzKnSb1qq27JIyEfyBT77A1xmfhBtgJ8vKEIsm5MyR7LZGMIrXYMwd5IL0317NtnpvpeMGXey8DbABEt43y0UQDpIxkkfwbzJs6BGUKI)FGKlmO5ZA4gX5V(t951E76rZVmSAJBuNuv(doL5nYt(LdhoEq2ElpMts02jxmGT9Zkf0(H3McshaIWT5pcyM6ReRXVbOo2WFzxXZz9ITykQjFtoTr(ld4ydqpvejZSxyUZk5FIhKe4PYExT1Lms2sMXZu)gHYGFRmJf8KlYfsArButqV4zkhSajAnvE0cN1dhkB5J36rlwDqT6tG4XqJ9GbY1BcCisT1GKCEy402TCeCHeE)PfDKBeMzJ0ZeWpnVEEYmciKtc9eCfdklIrEUefWMYDdX0IUIDyjQ7rvPghprHhdw(uFp1UPAmTraHyxqVAOcJBd1YFkOLI9xoBdmFP9n0UJVXtuzcCvVNIPPBznXmw6RaEoGg(i1((OkQeu9lp4BqFRQmS76NFd5oJ1LVT5o)((CzOsB03X2L6FIeLVw(v6Y09QAmFRfqw..7bce8d8ab16eaf8c1342a4a7b3e7b0100f58082dd49d8cc5d8ee528f161bb0ba579580015dce1747d454b545158b47f0bf4660f293adf3fc8392a86f498eec6ebb5fb6bc891e696987aef7d9d5282d9dce43729ac87a3515283b833b028bca48a5d5004842cd88bee068f495fbcb02ae4c493bc51dbb67811bb49852f498be64
callback: geetest_1605984542722
# Response
geetest_1605984542722({"message": "success", "success": 0})
關鍵步驟
a、圖片還原
配合前序請求返回的c陣列和圖片還原演算法對被切割打亂的圖片進行還原。
b、缺口識別
計算x座標可以參考我的另一篇文章《第三代驗證碼研究》https://www.cnblogs.com/boycelee/p/11363611.html
c、w引數
(gt, challenge, x座標, 滑動軌跡, c引數, s引數, 版本)對稱加密 + 使用非對稱加密對“對稱加密金鑰”進行加密後的加密串
使用對稱加密對引數進行加密,再使用非對稱加密對金鑰進行加密
d、資料圖
此處加密結構實在是太過於冗餘,所以用圖的方式更清晰
4、整體流程
三、成果展示
一旦驗證碼驗證通過就會返回validate。validate可以理解為通行令牌,該令牌會將環境檢測資料、行為資料以及風險結果等資料進行串聯,一般情況下如果成功獲取到validate引數,就預示著我們破解極驗驗證碼工作取得成功。
四、總結
總體來說,極驗驗證碼的整體設計不算複雜,但資料加密實在是太過於冗餘複雜了。
五、最後
如果想系統地瞭解第三代驗證碼,可以結合我的另一篇文章《第三代驗證碼研究》https://www.cnblogs.com/boycelee/p/11363611.html。
本文不提供完整解決方案和完整資料,僅用於理論研究,維護網路安全,人人有責。