Akamai sensor_data 3.0的流程笔记以及重要点

记录于:2025.1.8

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Akamai阿卡迈：常用于国外网站，2019年初期版本验证cookies中的_abck,后期增加ak_bmsc等其他指纹设备。

有数据的接口基本只需要_abck即可,

加密参数获取流程:

• 请求html文档会返回一段js链接，使用get请求可以获取实时的JavaScript代码。
• 使用获取到的代码来生成一段加密参数sensor_data,长度大约为一千七左右
• 使用post请求前面的js链接，若返回的结果的set-cookie中的_abck中间为 0 即获取到正确的cookie，若参数错误返回的是 -1

sensor_data 重要点

 

{
  "ver":"hYLXImDOnRR5eDAgk63ANnTyi5pMbcxsxh3tyRozcUc=",   
  "fpt":"-1",
  "fpc":"94",  
  "ajr":"45921|31341",                                   
  "din":[{"wow":2560},{"nap":"Gecko"},{"nal":"zh-CN"},{"ucs":"8102"},{"ran":"0.476463975238"},{"she":1440},{"ua":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36"},{"swi":2560},{"adp":"cpen:0,i1:0,dm:0,cwen:0,non:1,opc:0,fc:0,sc:0,wrc:1,isc:0,vib:1,bat:1,x11:0,x12:1"},{"ash":1400},{"xag":12147},{"hz1":427217},{"ibr":0},{"wdr":0},{"nps":"20030107"},{"wih":1279},{"wiw":2560},{"tsd":0},{"pha":0},{"npl":5},{"dau":0},{"hal":868161141468},{"asw":2560}],
  "eem":"do_en,dm_en,t_en",
  "ffs":"0,0,0,0,4910,113,0;0,-1,0,1,4771,1101,0;0,0,0,0,4702,113,0;0,-1,0,1,4681,1101,0;0,-1,0,1,4765,1101,0;0,0,0,0,4925,113,0;0,-1,0,1,4913,1101,0;0,0,0,0,4796,113,0;",
  "vev":"",
  "inf":"0,0,0,0,4910,113,0;0,-1,0,1,4771,1101,0;0,0,0,0,4702,113,0;0,-1,0,1,4681,1101,0;0,-1,0,1,4765,1101,0;0,0,0,0,4925,113,0;0,-1,0,1,4913,1101,0;0,0,0,0,4796,113,0;",
  "ajt":"0,0",
  "kev":"",
  "dme":"",
  "mev":"",
  "doe":"",
  "pur":"网页原链接",
  "pev":"",
  "mst":[{"kevl":1},{"mevl":32},{"tevl":32},{"devl":0},{"dmvl":0},{"pevl":0},{"tovl":0},{"delt":2},{"it":0},{"sts":1736322282936},{"fct":-999999},{"dd2":18574},{"kc":0},{"mc":0},{"ww8":0},{"pc":0},{"tc":0},{"ssts":2},{"tst":0},{"rval":"-1"},{"rcfp":"-1"},{"nfas":30261693},{"jsrf":"PiZtE"},{"jsrf1":72085},{"jsrf2":13},{"signals":"0"},{"mwd":"0"},{"hea":""},{"dvc":"adjfYf999k9mfkq7sj1v,10,l+c+k+d+g+i+h+a+e+j+"},{"srd":"0"}],
  "o9":0,
  "tev":"",
  "sde":"0,0,0,0,1,0,0",
  "pmo":"","dpw":"","pac":"",
  "per":"8",
  "pde":"","oev":"","if":"",
  "fwd":[{"fmh":""},{"fmz":""},{"ssh":"0"}]
}

(1) 每个JS的ver 还有mst[“dvc”]中的 l+c+k+d+g+i+h+a+e+j+ 每个js都是固定的

(2) ajr需要逆向, din mst 部分参数需要逆向

(3) akamai很好跟，xhr断点就可以找到加密参数的位置，一开始最好用fidder的AutoResponser 替换一下js再跟,然后差什么参数全局搜索就行.

(4) 注意: din跟完了之后有二十三个元素,最后有一个数组位移，把AutoResponser取消掉跟这里，不然看不出来差别，每个js的参数会不一样，但是同一个js刷新多少次都是同一个，会误以为这个参数不会变

(5) mst[“dvc”]中的参数 ，adjfYf999k9mfkq7sj1v这个是动态随机的，是根据时间的差值生成的

(6) ffs和inf 是根据页面的input标签生成的参数可以写死

附一张请求通过的记录，被风控会返回 418