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在對快手app抓包的時候，會發現有幾個非常重要的參數: sig 和 sig3

然后sig參數的計算邏輯大概就是對請求url 后面的參數，先進行排序，然后再加一個鹽值，最后在進行md5加密得到。

sig3 的計算邏輯就相對的復雜很多，在so層還有大量的反調試。(具體的代碼就不公布了，畢竟對人家不太友好)

ks的sig3參數算法還原效果如下:

這里我們就以視頻搜索接口為demo，看看搜索返回的數據:

sig3: 3165700419cb47b0040f2457fb57d23f816bdeb66a {"result":1,"subCommentsMap":{},"visibleLimit":4,"rootComments":[{"likedCount":0,"authorVerified":false,"commentAuthorTags":[],"commentBottomTags":[],"type":0,"content":"[贊][贊][贊]","time":"2021-10-30 10:45:58","timestamp":1635561957920,"comment_id":394172851253,"headurls":[{"cdn":"tx2.a.kwimgs.com","url":"http://tx2.a.kwimgs.com/uhead/AB/2021/04/25/02/BMjAyMTA0MjUwMjI5NTNfMTU5MzIzMzg1XzJfaGQ5MTFfNzkx_s.jpg"},{"cdn":"js2.a.kwimgs.com","url":"http://js2.a.kwimgs.com/uhead/AB/2021/04/25/02/BMjAyMTA0MjUwMjI5NTNfMTU5MzIzMzg1XzJfaGQ5MTFfNzkx_s.jpg"}],"author_name":"Big魔王\uD83D\uDC3C","reply_to":0,"author_liked":false,"headurl":"http://tx2.a.kwimgs.com/uhead/AB/2021/04/25/02/BMjAyMTA0MjUwMjI5NTNfMTU5MzIzMzg1XzJfaGQ5MTFfNzkx_s.jpg","profilePagePrefetchInfo":{"profilePageType":1},"author_id":159323385,"photo_id":5208131550045104023,"user_sex":"M","user_id":159199603},{"likedCount":0,"authorVerified":false,"commentAuthorTags":[],"commentBottomTags":[],"type":0,"content":"[贊][贊][贊]","time":"2021-10-30 10:21:30","timestamp":1635560490091,"comment_id":394165594399,"headurls":[{"cdn":"tx2.a.kwimgs.com","url":"http://tx2.a.kwimgs

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