Merge pull request #86 from Szperak/master
Added Allatori string deofuscator
This commit is contained in:
Kalen (Konloch) Kinloch
commit
dd7f8a1757
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@ -63,26 +63,28 @@ public class JarUtils {
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try {
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final String name = entry.getName();
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final byte[] bytes = getBytes(jis);
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if (!name.endsWith(".class")) {
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if(!entry.isDirectory())
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files.put(name, bytes);
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} else {
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String cafebabe = String.format("%02X", bytes[0])
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+ String.format("%02X", bytes[1])
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+ String.format("%02X", bytes[2])
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+ String.format("%02X", bytes[3]);
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if(cafebabe.toLowerCase().equals("cafebabe")) {
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try {
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final ClassNode cn = getNode(bytes);
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container.classes.add(cn);
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} catch(Exception e) {
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e.printStackTrace();
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}
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if(!files.containsKey(name)){
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if (!name.endsWith(".class")) {
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if(!entry.isDirectory())
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files.put(name, bytes);
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} else {
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System.out.println(jarFile+">"+name+": Header does not start with CAFEBABE, ignoring.");
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String cafebabe = String.format("%02X", bytes[0])
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+ String.format("%02X", bytes[1])
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+ String.format("%02X", bytes[2])
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+ String.format("%02X", bytes[3]);
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if(cafebabe.toLowerCase().equals("cafebabe")) {
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try {
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final ClassNode cn = getNode(bytes);
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container.classes.add(cn);
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} catch(Exception e) {
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e.printStackTrace();
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}
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} else {
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System.out.println(jarFile+">"+name+": Header does not start with CAFEBABE, ignoring.");
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}
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files.put(name, bytes);
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}
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}
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} catch(Exception e) {
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new the.bytecode.club.bytecodeviewer.api.ExceptionUI(e);
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} finally {
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@ -1,6 +1,7 @@
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package the.bytecode.club.bytecodeviewer.api;
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import java.io.File;
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import java.io.IOException;
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import java.net.URL;
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import java.net.URLClassLoader;
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import java.util.ArrayList;
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@ -62,50 +63,60 @@ public class BytecodeViewer {
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return cl;
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}
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/**
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* Re-instances the URLClassLoader and loads a jar to it.
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* @param path
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*
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* @param nodeList
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* The list of ClassNodes to be loaded
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* @return The loaded classes into the new URLClassLoader instance
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* @author Cafebabe
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* @throws IOException
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* @throws ClassNotFoundException
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*/
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public static List<Class<?>> loadClassesIntoClassLoader() {
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try {
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File f = new File(
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the.bytecode.club.bytecodeviewer.BytecodeViewer.tempDirectory +
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the.bytecode.club.bytecodeviewer.BytecodeViewer.fs +
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"loaded_temp.jar");
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JarUtils.saveAsJar(BytecodeViewer.getLoadedClasses(), f.getAbsolutePath());
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JarFile jarFile = new JarFile(""+f.getAbsolutePath());
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Enumeration<JarEntry> e = jarFile.entries();
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URL[] urls = { new URL("jar:file:" + ""+f.getAbsolutePath()+"!/") };
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cl = URLClassLoader.newInstance(urls);
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List<Class<?>> ret = new ArrayList<Class<?>>();
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while (e.hasMoreElements())
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{
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JarEntry je = (JarEntry) e.nextElement();
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if(je.isDirectory() || !je.getName().endsWith(".class"))
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continue;
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String className = je.getName().replace("/", ".").replace(".class", "");
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className = className.replace('/', '.');
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try{
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ret.add(cl.loadClass(className));
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}
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catch(Exception e2)
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{
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new the.bytecode.club.bytecodeviewer.api.ExceptionUI(e2);
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}
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}
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jarFile.close();
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return ret;
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}
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catch(Exception e)
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{
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new the.bytecode.club.bytecodeviewer.api.ExceptionUI(e);
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}
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return null;
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}
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@SuppressWarnings("deprecation")
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public static List<Class<?>> loadClassesIntoClassLoader(
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ArrayList<ClassNode> nodeList) throws IOException,
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ClassNotFoundException {
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File f = new File(
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the.bytecode.club.bytecodeviewer.BytecodeViewer.tempDirectory
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+ the.bytecode.club.bytecodeviewer.BytecodeViewer.fs
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+ "loaded_temp.jar");
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JarUtils.saveAsJarClassesOnly(nodeList, f.getAbsolutePath());
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JarFile jarFile = new JarFile("" + f.getAbsolutePath());
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Enumeration<JarEntry> e = jarFile.entries();
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cl = URLClassLoader.newInstance(new URL[]{ f.toURL() });
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List<Class<?>> ret = new ArrayList<Class<?>>();
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while (e.hasMoreElements()) {
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JarEntry je = (JarEntry) e.nextElement();
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if (je.isDirectory() || !je.getName().endsWith(".class"))
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continue;
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String className = je.getName().replace("/", ".").replace(".class", "");
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className = className.replace('/', '.');
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ret.add(cl.loadClass(className));
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}
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jarFile.close();
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return ret;
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}
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/**
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* Re-instances the URLClassLoader and loads a jar to it.
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* @return The loaded classes into the new URLClassLoader instance
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* @author Cafebabe
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* @throws IOException
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* @throws ClassNotFoundException
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*/
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public static List<Class<?>> loadAllClassesIntoClassLoader() throws ClassNotFoundException, IOException {
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return loadClassesIntoClassLoader(getLoadedClasses());
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}
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/**
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* Creates a new instance of the ClassNode loader.
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@ -110,7 +110,7 @@ public final class ClassNodeLoader extends ClassLoader {
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if (classes.containsKey(name)) {
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return nodeToClass(classes.get(name));
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} else {
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return super.loadClass(name);
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return super.findClass(name);
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}
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}
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@ -304,7 +304,7 @@ public class InstructionPrinter {
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protected String printInvokeDynamicInsNode(InvokeDynamicInsnNode idin) {
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StringBuilder sb = new StringBuilder();
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sb.append(nameOpcode(idin.opcode()) + " " + idin.name + "(");
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sb.append(nameOpcode(idin.opcode()) + " " + idin.bsm.getName() + "(");
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String desc = idin.desc;
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String partedDesc = idin.desc.substring(2);
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@ -0,0 +1,77 @@
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package the.bytecode.club.bytecodeviewer.gui;
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import java.awt.Dimension;
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import java.awt.event.ActionEvent;
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import java.awt.event.ActionListener;
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import javax.swing.JButton;
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import javax.swing.JFrame;
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import javax.swing.JLabel;
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import javax.swing.JTextField;
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import the.bytecode.club.bytecodeviewer.Resources;
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import the.bytecode.club.bytecodeviewer.plugin.PluginManager;
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import the.bytecode.club.bytecodeviewer.plugin.preinstalled.AllatoriStringDecrypter;
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/***************************************************************************
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* Bytecode Viewer (BCV) - Java & Android Reverse Engineering Suite *
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* Copyright (C) 2014 Kalen 'Konloch' Kinloch - http://bytecodeviewer.com *
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* *
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* This program is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation, either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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***************************************************************************/
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/**
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* The UI for replace strings plugin.
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*
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* @author Konloch
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*
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*/
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public class AllatoriStringDecrypterOptions extends JFrame {
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public AllatoriStringDecrypterOptions() {
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this.setIconImages(Resources.iconList);
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setSize(new Dimension(250, 120));
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setResizable(false);
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setTitle("Allatori decrypter");
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getContentPane().setLayout(null);
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JButton btnNewButton = new JButton("Decrypt");
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btnNewButton.setBounds(6, 56, 232, 23);
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getContentPane().add(btnNewButton);
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JLabel lblNewLabel = new JLabel("Class:");
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lblNewLabel.setBounds(6, 20, 67, 14);
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getContentPane().add(lblNewLabel);
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textField = new JTextField();
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textField.setToolTipText("* will search all classes");
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textField.setText("*");
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textField.setBounds(80, 17, 158, 20);
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getContentPane().add(textField);
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textField.setColumns(10);
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btnNewButton.addActionListener(new ActionListener() {
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public void actionPerformed(ActionEvent arg0) {
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PluginManager.runPlugin(new AllatoriStringDecrypter(textField.getText()));
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dispose();
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}
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});
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this.setLocationRelativeTo(null);
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}
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private static final long serialVersionUID = -2662514582647810868L;
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private JTextField textField;
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}
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@ -311,36 +311,6 @@ public class FileNavigationPane extends VisibleComponent implements
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ImageRenderer renderer = new ImageRenderer();
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tree.setCellRenderer(renderer);
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if(!container.classes.isEmpty()) {
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for(ClassNode c : container.classes) {
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String name = c.name;
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final String[] spl = name.split("/");
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if (spl.length < 2) {
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root.add(new MyTreeNode(name+".class"));
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} else {
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MyTreeNode parent = root;
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for (int i1 = 0; i1 < spl.length; i1++) {
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String s = spl[i1];
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MyTreeNode child = null;
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for (int i = 0; i < parent.getChildCount(); i++) {
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if (((MyTreeNode) parent.getChildAt(i)).getUserObject()
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.equals(s)) {
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child = (MyTreeNode) parent.getChildAt(i);
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break;
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}
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}
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if (child == null) {
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if(i1 == spl.length-1)
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child = new MyTreeNode(s+".class");
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else
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child = new MyTreeNode(s);
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parent.add(child);
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}
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parent = child;
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}
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}
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}
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}
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if(!container.files.isEmpty()) {
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for (final Entry<String, byte[]> entry : container.files.entrySet()) {
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@ -2029,8 +2029,12 @@ public class MainViewerGUI extends JFrame implements FileChangeNotifier {
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});
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mntmNewMenuItem_2.addActionListener(new ActionListener() {
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@Override
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public void actionPerformed(ActionEvent e) {
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PluginManager.runPlugin(new AllatoriStringDecrypter());
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public void actionPerformed(ActionEvent arg0) {
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if(BytecodeViewer.getLoadedClasses().isEmpty()) {
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BytecodeViewer.showMessage("First open a class, jar, zip, apk or dex file.");
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return;
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}
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new AllatoriStringDecrypterOptions().setVisible(true);
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}
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});
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mntmNewMenuItem_1.addActionListener(new ActionListener() {
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@ -1,11 +1,27 @@
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package the.bytecode.club.bytecodeviewer.plugin.preinstalled;
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import java.io.IOException;
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import java.lang.reflect.Method;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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import javax.swing.JDialog;
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import javax.swing.JOptionPane;
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import org.objectweb.asm.tree.AbstractInsnNode;
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import org.objectweb.asm.tree.ClassNode;
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import org.objectweb.asm.tree.InsnList;
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import org.objectweb.asm.tree.InvokeDynamicInsnNode;
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import org.objectweb.asm.tree.LdcInsnNode;
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import org.objectweb.asm.tree.MethodInsnNode;
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import org.objectweb.asm.tree.MethodNode;
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import the.bytecode.club.bytecodeviewer.BytecodeViewer;
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import the.bytecode.club.bytecodeviewer.JarUtils;
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import the.bytecode.club.bytecodeviewer.api.ExceptionUI;
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import the.bytecode.club.bytecodeviewer.api.Plugin;
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import the.bytecode.club.bytecodeviewer.api.PluginConsole;
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/***************************************************************************
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* Bytecode Viewer (BCV) - Java & Android Reverse Engineering Suite *
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@ -29,14 +45,218 @@ import the.bytecode.club.bytecodeviewer.api.Plugin;
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* Coming soon.
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*
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* @author Konloch
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* @author Szperak
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*
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*/
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public class AllatoriStringDecrypter extends Plugin {
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PluginConsole frame = new PluginConsole("Allatori decrypter");
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StringBuilder out = new StringBuilder();
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private String className;
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public AllatoriStringDecrypter(String className) {
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this.className = className;
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}
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@Override
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public void execute(ArrayList<ClassNode> classNodeList) {
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BytecodeViewer.showMessage("This is a planned feature.");
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JOptionPane pane = new JOptionPane(
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"WARNING: This will load the classes into the JVM and execute allatori decrypter function"
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+ BytecodeViewer.nl
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+ "for each class. IF THE FILE YOU'RE LOADING IS MALICIOUS, DO NOT CONTINUE.");
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Object[] options = new String[] { "Continue", "Cancel" };
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pane.setOptions(options);
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JDialog dialog = pane.createDialog(BytecodeViewer.viewer,
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"Bytecode Viewer - WARNING");
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dialog.setVisible(true);
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Object obj = pane.getValue();
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int result = -1;
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for (int k = 0; k < options.length; k++)
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if (options[k].equals(obj))
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result = k;
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if (result == 0) {
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try {
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if (!className.equals("*")) {
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for (ClassNode classNode : classNodeList) {
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if (classNode.name.equals(className))
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scanClassNode(classNode);
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}
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} else {
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for (ClassNode classNode : classNodeList) {
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scanClassNode(classNode);
|
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}
|
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}
|
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}catch(Exception e){
|
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new ExceptionUI(e, "github.com/Szperak");
|
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} finally {
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frame.appendText(out.toString());
|
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frame.setVisible(true);
|
||||
}
|
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}
|
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}
|
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|
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private void log(String msg){
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out.append(msg);
|
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out.append(BytecodeViewer.nl);
|
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}
|
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|
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public void scanClassNode(ClassNode classNode) throws Exception {
|
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for(MethodNode method : classNode.methods){
|
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scanMethodNode(classNode, method);
|
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}
|
||||
|
||||
}
|
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|
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public int readUnsignedShort(byte[] b, final int index) {
|
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return ((b[index] & 0xFF) << 8) | (b[index + 1] & 0xFF);
|
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}
|
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private int getConstantPoolSize(String className){
|
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byte[] fileContents = BytecodeViewer.getFileContents(className+".class");
|
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return readUnsignedShort(fileContents, 8);
|
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}
|
||||
|
||||
|
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public void scanMethodNode(ClassNode classNode, MethodNode methodNode) throws Exception {
|
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InsnList iList = methodNode.instructions;
|
||||
|
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log("Scanning method " + methodNode.name+" of " + classNode.name);
|
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|
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LdcInsnNode laststringldconstack = null;
|
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for (AbstractInsnNode i : iList.toArray()) {
|
||||
if(i instanceof LdcInsnNode) {
|
||||
LdcInsnNode ldci = (LdcInsnNode) i;
|
||||
if(ldci.cst instanceof String){
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laststringldconstack = ldci;
|
||||
}
|
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continue;
|
||||
} else if(i instanceof MethodInsnNode) {
|
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MethodInsnNode methodi = (MethodInsnNode) i;
|
||||
|
||||
|
||||
|
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if(laststringldconstack != null && methodi.opcode() == 0xb8) { // Decryption is always a static call - 0xb8 - invokestatic
|
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String decrypterclassname = methodi.owner;
|
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String decryptermethodname = methodi.name;
|
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|
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if(decrypterclassname.contains("$")) { // Decrypter is always a static method of other class's inner class
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byte[] decrypterFileContents = BytecodeViewer.getFileContents(decrypterclassname+".class");
|
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|
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// We have to create new node for editing
|
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// Also, one decrypter method could be used for multiple methods in code, what gives us only part of string decrypted
|
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ClassNode decrypterclassnode = JarUtils.getNode(decrypterFileContents);
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|
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if(decrypterclassnode != null) {
|
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MethodNode decryptermethodnode = decrypterclassnode.getMethodByName(decryptermethodname);
|
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if(decryptermethodnode != null) {
|
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|
||||
String keyString = (getConstantPoolSize(classNode.name)+
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classNode.name+
|
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methodNode.name+
|
||||
getConstantPoolSize(classNode.name)
|
||||
);
|
||||
|
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int newHashCode = keyString.hashCode();
|
||||
|
||||
scanDecrypter(decryptermethodnode, newHashCode);
|
||||
|
||||
try {
|
||||
System.out.println("loading " + decrypterclassname);
|
||||
|
||||
List<Class<?>> decrypterclasslist = the.bytecode.club.bytecodeviewer.api.BytecodeViewer
|
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.loadClassesIntoClassLoader(new ArrayList<ClassNode>(
|
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Arrays.asList(new ClassNode[] { decrypterclassnode })));
|
||||
|
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String decrypted = invokeDecrypter(decrypterclasslist.get(0), decryptermethodname, (String) laststringldconstack.cst);
|
||||
|
||||
if (decrypted != null) {
|
||||
log("Succesfully invoked decrypter method: "+decrypted);
|
||||
laststringldconstack.cst = decrypted;
|
||||
iList.remove(methodi);
|
||||
}
|
||||
} catch (IndexOutOfBoundsException | ClassNotFoundException | IOException e) {
|
||||
e.printStackTrace();
|
||||
log("Could not load decrypter class: " + decrypterclassname);
|
||||
}
|
||||
|
||||
}else{
|
||||
log("Could not find decrypter method ("+decryptermethodname+") of class "+decrypterclassname);
|
||||
}
|
||||
}else{
|
||||
log("Could not find decrypter ClassNode of class "+decrypterclassname);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
}else if(i instanceof InvokeDynamicInsnNode){
|
||||
InvokeDynamicInsnNode methodi = (InvokeDynamicInsnNode) i;
|
||||
if(methodi.opcode() == 0xba){
|
||||
// TODO: Safe-reflection deobfuscator here
|
||||
// Allatori replaces invokeinterface and invokestatic with invokedynamic
|
||||
|
||||
//log(methodi.bsm.getOwner()+" dot "+methodi.bsm.getName());
|
||||
//iList.set(methodi, new MethodInsnNode(0xb8, methodi.bsm.getOwner(), methodi.bsm.getName(), methodi.bsm.getDesc(), false));
|
||||
|
||||
}
|
||||
|
||||
|
||||
}
|
||||
laststringldconstack = null;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
private boolean scanDecrypter(MethodNode decryptermethodnode, int newHashCode){
|
||||
InsnList iList = decryptermethodnode.instructions;
|
||||
|
||||
AbstractInsnNode insn = null, removeInsn = null;
|
||||
for (AbstractInsnNode i : iList.toArray()) {
|
||||
if(i instanceof MethodInsnNode){
|
||||
MethodInsnNode methodi = ((MethodInsnNode) i);
|
||||
if("currentThread".equals(methodi.name)){ // find code form this instruction
|
||||
insn = i;
|
||||
break;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
if(insn == null){
|
||||
return false;
|
||||
}
|
||||
|
||||
while(insn != null){
|
||||
if(insn instanceof MethodInsnNode){
|
||||
MethodInsnNode methodi = ((MethodInsnNode) insn);
|
||||
if("hashCode".equals(methodi.name)){ // to this instruction
|
||||
break;
|
||||
}
|
||||
}
|
||||
removeInsn = insn;
|
||||
insn = insn.getNext();
|
||||
iList.remove(removeInsn); // and remove it
|
||||
}
|
||||
if(insn == null) return false;
|
||||
iList.set(insn, new LdcInsnNode(newHashCode)); // then replace it with pre-computed key LDC
|
||||
return true;
|
||||
}
|
||||
|
||||
private String invokeDecrypter(Class<?> decrypterclass, String name, String arg) throws Exception{
|
||||
try {
|
||||
Method decryptermethod = decrypterclass.getDeclaredMethod(name, String.class);
|
||||
|
||||
decryptermethod.setAccessible(true);
|
||||
return (String) decryptermethod.invoke(null, arg);
|
||||
|
||||
} catch (Exception e) {
|
||||
log("Could not invoke decrypter method: "+name+" of class "+decrypterclass.getName());
|
||||
throw e;
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
|
|
|||
|
|
@ -3,6 +3,7 @@ package the.bytecode.club.bytecodeviewer.plugin.preinstalled;
|
|||
import org.objectweb.asm.tree.ClassNode;
|
||||
|
||||
import the.bytecode.club.bytecodeviewer.BytecodeViewer;
|
||||
import the.bytecode.club.bytecodeviewer.api.ExceptionUI;
|
||||
import the.bytecode.club.bytecodeviewer.api.Plugin;
|
||||
import the.bytecode.club.bytecodeviewer.api.PluginConsole;
|
||||
|
||||
|
|
@ -63,28 +64,31 @@ public class ZStringArrayDecrypter extends Plugin {
|
|||
|
||||
if (result == 0) {
|
||||
boolean needsWarning = false;
|
||||
for (Class<?> debug : the.bytecode.club.bytecodeviewer.api.BytecodeViewer.loadClassesIntoClassLoader()) {
|
||||
try {
|
||||
Field[] fields = debug.getDeclaredFields();
|
||||
for ( Field field : fields ) {
|
||||
if ( field.getName().equals("z") ) {
|
||||
out.append(debug.getName() + ":" + BytecodeViewer.nl);
|
||||
field.setAccessible(true);
|
||||
if(field.get(null) != null && field.get(null) instanceof String[] && Modifier.isStatic(field.getModifiers()) && Modifier.isFinal(field.getModifiers())) {
|
||||
String[] fieldVal = (String[]) field.get(null);
|
||||
for ( int i = 0; i < fieldVal.length; i++ ) {
|
||||
out.append(" z[" + i + "] = " + fieldVal[i] + BytecodeViewer.nl);
|
||||
try {
|
||||
for (Class<?> debug : the.bytecode.club.bytecodeviewer.api.BytecodeViewer.loadAllClassesIntoClassLoader()) {
|
||||
try {
|
||||
Field[] fields = debug.getDeclaredFields();
|
||||
for ( Field field : fields ) {
|
||||
if ( field.getName().equals("z") ) {
|
||||
out.append(debug.getName() + ":" + BytecodeViewer.nl);
|
||||
field.setAccessible(true);
|
||||
if(field.get(null) != null && field.get(null) instanceof String[] && Modifier.isStatic(field.getModifiers()) && Modifier.isFinal(field.getModifiers())) {
|
||||
String[] fieldVal = (String[]) field.get(null);
|
||||
for ( int i = 0; i < fieldVal.length; i++ ) {
|
||||
out.append(" z[" + i + "] = " + fieldVal[i] + BytecodeViewer.nl);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
} catch(NoClassDefFoundError | Exception e) {
|
||||
System.err.println("Failed loading class " + debug.getName());
|
||||
e.printStackTrace();
|
||||
needsWarning = true;
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
} catch(NoClassDefFoundError | Exception e) {
|
||||
System.err.println("Failed loading class " + debug.getName());
|
||||
e.printStackTrace();
|
||||
needsWarning = true;
|
||||
}
|
||||
}
|
||||
} catch (Exception e){
|
||||
new ExceptionUI(e);
|
||||
}
|
||||
if(needsWarning) {
|
||||
BytecodeViewer.showMessage("Some classes failed to decrypt, if you'd like to decrypt all of them"+BytecodeViewer.nl+"makes sure you include ALL the libraries it requires.");
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user