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前言
简单分析一下极验4文字点选。
逆向过程
训练和孪生部分我就不说了。
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);
});
};
function getData(lot_number,captcha_id,date_time,passtime,userresponse,payload,process_token){
result = {
"passtime": passtime,
"userresponse": userresponse,
"device_id": "",
"lot_number": lot_number,
}
Object.assign(result,window.i(lot_number,captcha_id,'md5',"1",0,date_time,""))
Object.assign(result,{
"geetest": "captcha",
"lang": "zh",
"ep": "123",
"biht": "1426265548",
gee_guard:undefined,
MEcY: "4yMyZD",
em:{
"ph": 0,
"cp": 0,
"ek": "11",
"wd": 1,
"nt": 0,
"si": 0,
"sc": 0
}
})
w = window.s(window.encrypt['stringify'](result),{
options:{
'pt':'1',
}
})
// console.log(window.guid())
data = {
"callback": `geetest_${Date.now()}`,
"captcha_id": captcha_id,
"client_type": "web",
"lot_number": lot_number,
"payload": payload,
"process_token": process_token,
"payload_protocol": 1,
"pt": "1",
"w": w
}
return data
}
结果
