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如何解码Elasticsearch msearch接口的加密JSON请求载荷?

问题

我正在对接口https://respublica.co/elasticsearch/msearch进行逆向工程分析。查看请求载荷时,发现如下JSON格式的加密请求内容,无法理解其含义,请问是否有方法可以解码该内容?

{"z":"IAPva+ZXLSJqNoRPf9rOKt91BbXQY4x9jiAhY1BRSG4fzb5bSPYjx/gKwdJ3OB5egI9ctPoUMTEMstfpp3HM7P3bHBug8ut4FKHQ4GvKCTzP/jiBz2AQXNtVtjmM3F85MvrUVoaae2cC4mLn5z1gkVIf0LHcf7ex1hL2gw78mn5xk/JU2L1ECuf+ONyVt14xlU1pxAIQ+kU+P2vkSu1ja4lGUNFxPgP6ZyGEbyx9oUERIgOUJ5nm9kAsUJu3c3w0sntjkl7zIRj5OOerDE8MJQKAj1Byv7qcFNhohDikSK75A5W49qYng8JGXLrgSVPYuBU/X5RCvIqpvqUKss6cE79eWHIVFJ7BnHI0kQ3S1Rk+ItGZD8pkbsvOj8jFKQU85YR8FVeWzOF/sQIWFBknwVCQzxmPMO/bNI/NNwPQonPlAycPlfSm8A+hGKLkNkSJCOupFUNmooKwYgRq39kJsm6bIVLj4dCxKZ0vQoEYUZPov0G9O/R8Tp5R3depaZPInCyi8ls1W/njSgnEhnXt9PodfhlstB44Pi4j/SltwPEaEHcLo7p/I6fnWSytEeaqHH0nGxkFWO7LQqBjaamXLxmdMfzubONhH/hJBKpVapLzMpRax8PJRrQq+Zav8jLcd+uH1DshtB/skbtoA6H0GFYEI51Z626JaY3G9YGP061V3t4D66pLRoBudsPgU1tfRcEN8PEELP3HUKOG02j5jyCnmfQPK1tL7ClN8NL7nOnAfQzQfesyPFnorOe8EqFSPtBjke5Ya8aQ4SsRCsEwn3IDbejKIY9w/4+C8xiI17Gy9TwsYFBx3HVLJUcF8r8gX3rx8+gDXeb6I+QCY9HOh69smEVGcQBR57gEB41xQWd8oKMm+OsR7NJJY6LEv4E3elacLMrNS8eyHPsEteF51w/ZuYnPOVb67Yv2c4ShUOERs0LFH/8Uij8HrtgrpQU0xSq6QWxf85mld0reLTssSMlQ0fk6gyAhi3QFmUp8VfqPZ/ypt7AOUOk6E3auu9I86GIWlEb3FvDBBbbHZm546f2zEB+nTOaSSNyACy8S9mUIdpsLUi2GyATFzhiCgcEMltgT4wA3gMtx9bsLCX4q1YhKVcweWbhRHoKhwqqQ3lmiDMdPkvYEFvjrR05MJjvg5ZwxAQOwnDkWQb+NcCPrWcqGkGtUOXdf2dhuqWfii4aHK2ObZBJCl98DJHIZ6SAlaLaTAWB9ypn6qIigLbpAiuxvmQpPkQSxr3lGLHhKnjVc1SoR6R7Ab5kE2ImZxjtx73BlV0rOCm8rrUULzPgKOkoKeruwKyp5S3pqddfbw29f2RqaudTyRRtZlt3ujDcOcotsxu21hCTnbDNWSMUL319OQuIOxrxbpk8l0vpJ87zRLlVEZXHSm8FfU/3Qe34wkodLBbKy1e48OzYLnGhpublZ3rBG/REVaLinJd2rhBhGYAbbPPhNL4Q/cORbRJyfdhRbkZFWQ9ggXNkt1TvBTmj1UifdcVKUt5zlAbWWLdiRlzpLIEhLvN5rfFfkVgs0h7IV4dVR4LoUB5kAxILS/8dMagtg/WBJuryAs8HUTgpSU0umipqVljLu1GhQHxMMFmH/jmKIGcuoHyu9EUQNSTeqLxUOlWzi4h4oVFDr1LS99RM9dEudyu6fkzm02slcyZAZrXv+Qq03fcS9Zgw78qnCAu1FEm3qf5m2K9QcSVO0cCGC0uSm0ei30856/G58Spl3pPpr3MyjujQTh6c3SybflurowyRN2obsRUdIlAPWuVTa5Mjq+mbpFZyr1YdwdBkaSnOd2WRLFNEZrNYvS8jK4YIXOk126W8csqf6hF0+vHcTViAoLtNYgtb87CPoKHhn40Cc0EhL3Q7gz87G/NBKV3d5pqOJroiZRDy7+LKCrOPq00Xl9ue1fmh5UNiROMbPg0eiy4PTKHBhigMLNn8ajD4u2yjiVZRT5YcLYfk6pSvaMnEO7RnJByOpGCf/ydlW6o/8UqaPuNL6YCj/pKKzWJr2Hxr8fpsjbhCzxi58F0hIvq64DAI1rjZ7NIxKToNlFVsKT/MwIN5MrvTTT+1Jm4maO9o9XSQK89WQBgoZJVV0MPY+PlZXPYduzsZ9TLjY8zLkQFKKpIH7X4R+wRy+p93y3n922NXzfM8L8nbAxa2ReEByT9x+lCP/eYXOAqfPavPR7G2hXkX4bhnqOo7IB778WK7Ap3JJ2eIRXwQOazCy2ufvQRi/rvht6k65+LcggutJTCM2Z2UNVpv809hq7BNClVPDjyA5Yr2qWtQR0yx6gydadKATh7zVw/GJtTZE5lFN1VwVtvV95Vh2JXeDUPcoToqE6yK1f1AhVIg5eO54k22zeqic5SgmCGGIhUgBKJoUN1Jg2nXecUX2meAhE6HSJOGFiSmZ9eNBj1ngge4poc/9ccqpj+t+kaeEPfWX9+WXsw0LSwISE2KQsQ26OyDJfSaofoTQ0m5guVK0Onj4iFWn6JFiNbd4tTA9Nsv+fLkC2NXKIAnOK3/g8WOFOtHQZPiiMXBDSV9eiXJDxQo06ueu5vKVCUGS38zuaE1FdnRCM2zvQTagvekMDDObeTDX4LSFZCwEOSdwFv1uO502Rl0ytVBFB9cfJEu1O3RXh26C67edcgtgWJt+/brwy/C0Ti8OojLLtTRJAY2m5PivWWasDSqCrt0oc8HtADUwzgPImCOlSzT6su16vkoxvBlxJySURFeUf+OaLasQ2yeNJTNj8sDYUaLbGJU3ktoPKssyPE1dYWkKRTFmD2wvM6yYqVOh/+tadTL0bAvcrbt+M5a/VmgMl8igkgZLtxKYw7ySTOHPl34dtnN0OIZDzyjM2vyxbU4pEPrYWoY+1bOnF1UMw5Pycc2WIeaGGC1PPbTFh6JsbrlSeNKM2+4bH6+OIiXyciLryUTiCuAVIAaaT6MdpT9/TelP5HzK1dpBJwVY4J/jIeZCwXV6Ci5rFt4ulSdL7itdK6DcGo6mxZ1MixEvaorEr4sLm388aTzBjKKyU3OZSR5CHCSs1DooRESInzV+l93hCl40hh/QsSgwCq0z4lb5vBI8v2+GtmjIP5JaYylR74cODlg5qEEu/AvxkdFyed+WQGtEWpCql6MXeQPLK1W+HjMKU4WFzqRStZ8J4TthuDDxQCC0lcxgTDWXXtj5jEapwFbWPHOZxBd2sUYqqL1ScZCXTjM/jfwEA74+2tt43wYyNMjvfeEDs0iXHq0edYA0yYsXaP+re+25Pup7CaepyzlwsVMLIfgVVbWBix6u5+F6NLLQsyWG1rJ6VR5G66Ew8Pgagov4t7Mlo36KzwgUGWTzWqlaLKg3ZNxJJoHiN0dTWiqzj7S99vGyW97oYaOyZ9tdHrDKqAboWDrTEAAuEJXmCwnIMKjutQn0X5TMrIZEAgJNf7MbLE75csk5VLUo/SMyWVdTP3A4NsiAtzpyES/iVNWbYMjkDuP95p5Gky8M4dwewgYmeM+GP2NglIQilZEkdO0Cnl2cnw8aSm+JJi7SHCKOyOAs/AUc6F9+yjH5Pk5LLNUdUrY1GT9DIwtM9DT1p6FpOzbfw6tcCMqgAlXdc6HmhB0sXd39NpKbtKIGe7xGb0zRY1ylpKuRF5MTOxGaITrMcFb1IltpZc9Fss+3kGEw2Q3DavcsUY8R3f7eXwg3y3VGCRanz+Ml/Aw7v3t1uQFeMAlJD5bzjJQq1bhAgCSyDVLavBU7/Y07Kn+RqnFI1ChfkuTJdOqGOnobwGRfDIGUIfeFm7imFTf5K+AzBSTOn8mZVLQXAaeBp2hW8lrShHM/+GpBDF/Lgx9fz+7n433pOaMFVHOwCKEqocaqoLVOUfEfqqerZxFDiQoo3jQlz2Cyu8sC2pWIKiJNt9KgmcudcpFDEvQrp+yWuSSoHagxwA5219yv73oKiPcvItm9WhSKCC4/nSrEjDC513dxaZ2BMcZlSkiEsvgtVMe4mt4YRTEWthY0iJm1pZrqKBtQwQ==","y":"bM0kriQGnK34eBZ6Cz30sA==","x":"a7bsy6/TdR2roPynoJBNxLE9Pn86gf2KxVh+6nOXRdE="}

我可以发送该载荷的请求,但希望修改它以查询API中的不同用户。发起该请求的网页链接为:https://respublica.co/profile?user=Cao_Cao

解决方案
  • 定位加密逻辑:打开浏览器开发者工具(F12),切换到Sources标签页,搜索z、x、y这类参数名,找到生成加密载荷的JS代码。这类加密一般用AES、RSA或自定义算法,结合用户ID(如Cao_Cao)和请求上下文生成参数。
  • 还原明文请求:找到加密函数后,传入已知用户参数运行,对比加密结果和现有载荷验证逻辑;也可以在代码中插断点,查看加密前的明文——通常是标准的Elasticsearch msearch请求格式。
  • 生成自定义请求:掌握加密逻辑后,修改明文中的用户标识(比如把Cao_Cao换成目标用户ID),用相同算法生成新的z、x、y参数,替换后发送请求即可。
  • 校验额外验证项:部分网站会加请求签名、时间戳或Cookie校验确保合法性,若修改后请求失败,需同步处理这些项。

内容的提问来源于stack exchange,提问作者1azza

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最近更新时间:2026.08.13 20:00:47