Add the current files and make a README.md for those who are not coming from the tutorial or want to build this themselves

This commit is contained in:
2023-10-17 07:51:05 -04:00
parent ccc000ffb9
commit fcd281f792
5 changed files with 138 additions and 1 deletions

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package net.x3f200c.pala4linux.launcherpatch;
import java.lang.instrument.Instrumentation;
import java.lang.instrument.UnmodifiableClassException;
import java.lang.Class;
import java.lang.String;
import net.x3f200c.pala4linux.launcherpatch.LauncherPatcher;
public class LauncherPatch {
public static void premain(String agentArgs, Instrumentation inst) {
patch(inst);
}
public static void agentmain(String agentArgs, Instrumentation inst) {
patch(inst);
}
public static void patch(Instrumentation inst) {
Class<?> routeHandlerClass = null;
ClassLoader routeHandlerClassLoader = null;
try {
routeHandlerClass = Class.forName("fr.paladium.router.route.common.CommonRoute");
routeHandlerClassLoader = routeHandlerClass.getClassLoader();
} catch(ClassNotFoundException e) {
}
LauncherPatcher dt = new LauncherPatcher(routeHandlerClass.getName(), routeHandlerClassLoader);
inst.addTransformer(dt, true);
try {
inst.retransformClasses(routeHandlerClass);
} catch(UnmodifiableClassException e) {
}
}
}

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package net.x3f200c.pala4linux.launcherpatch;
import java.lang.instrument.ClassFileTransformer;
import java.io.IOException;
import java.security.ProtectionDomain;
import javassist.ClassPool;
import javassist.CtClass;
import javassist.CtMethod;
import javassist.NotFoundException;
import javassist.CannotCompileException;
class LauncherPatcher implements ClassFileTransformer {
private final String targetClassName;
public LauncherPatcher(String className, ClassLoader classLoader) {
this.targetClassName = className;
}
@Override
public byte[] transform(ClassLoader loader, String className, Class<?> redefinedClass, ProtectionDomain protectionDomain, byte[] classBuffer) {
byte[] bytecode = classBuffer;
String finalTargetClassName = this.targetClassName.replaceAll("\\.", "/");
if (!className.equals(finalTargetClassName)) {
return bytecode;
}
if (className.equals(finalTargetClassName)) {
try {
ClassPool cp = ClassPool.getDefault();
CtClass crClass = cp.get("fr.paladium.router.route.common.CommonRoute");
CtMethod osGetterMethod = crClass.getDeclaredMethod("handleGetOS");
osGetterMethod.setBody("{ return fr.paladium.router.handler.CefRouteHandler.create().success(\"os\", \"windows\"); }");
bytecode = crClass.toBytecode();
crClass.detach();
} catch(NotFoundException | CannotCompileException | IOException e) {
}
}
return bytecode;
}
}

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Agent-Class: net.x3f200c.pala4linux.launcherpatch.LauncherPatch
Can-Redefine-Classes: true
Can-Retransform-Classes: true
Premain-Class: net.x3f200c.pala4linux.launcherpatch.LauncherPatch