关于Nashorn在kjs中的应用

[忆然]

前言
ClassFilter是kjs的一个保护机制,笔者在这里不建议进行对ClassFilter动手脚
此篇仅以替换kjs的ClassFilter为例子展示Nashorn在kjs的使用
本文使用:CC-BY-NC-SA 4.0协议

因为1.21.1的kubejs ban了反射,因此只能在nashorn里面进行操作
Nashorn比较复杂,这次就仅展示成品

let $KubeJS = Java.loadClass("dev.latvian.mods.kubejs.KubeJS")

let $ServerLifecycleHooks = Java.loadClass("net.neoforged.neoforge.server.ServerLifecycleHooks")
/**@type {$MinecraftServer_} */
let Server = $ServerLifecycleHooks.getCurrentServer()
//所有的scriptmanager获取
let ServerScriptMagager = Server.getServerResources().managers().kjs$getServerScriptManager()
let ClientScriptMagager = $KubeJS.getClientScriptManager()
let StartupScriptMagager = $KubeJS.getStartupScriptManager()



let $ScriptEngineManager = Java.loadClass("javax.script.ScriptEngineManager")
let Nashorn = new $ScriptEngineManager().getEngineFactories()[0].getScriptEngine()


Nashorn.eval(`
  var Clazz = Java.type("java.lang.Class")
  var ClassFilter = Java.type("dev.latvian.mods.kubejs.plugin.ClassFilter")
  var HashSet = Java.type("java.util.HashSet")
  var ArrayList = Java.type("java.util.ArrayList")

  var ScriptManager$Clazz = Clazz.forName("dev.latvian.mods.kubejs.script.ScriptManager")
  var ScriptManager$classFilter$Field = ScriptManager$Clazz.getDeclaredField("classFilter")

  var ClassFilter$Clazz = Clazz.forName("dev.latvian.mods.kubejs.plugin.ClassFilter")
  var ClassFilter$denyStrong$Field = ClassFilter$Clazz.getDeclaredField("denyStrong")
  var ClassFilter$denyWeak$Field = ClassFilter$Clazz.getDeclaredField("denyWeak")
  
  ScriptManager$classFilter$Field.setAccessible(true)
  ClassFilter$denyStrong$Field.setAccessible(true)
  ClassFilter$denyWeak$Field.setAccessible(true)

  var unlock=function(ScriptMagager){
    var ClassFilter = ScriptManager$classFilter$Field.get(ScriptMagager)
    ClassFilter$denyStrong$Field.set(ClassFilter,new HashSet())
    ClassFilter$denyWeak$Field.set(ClassFilter,new ArrayList())
  }
`)
//参数传入scriptmanager即可爆破classfilter
Nashorn.invokeFunction("unlock",ServerScriptMagager)
let $File = Java.loadClass("java.io.File")

[假发]

要长脑子了

[sdjge]

补药在1.21.1偷走我的钱包