Re-Added Szperak's Allatori String Decrypter
This commit is contained in:
Konloch
parent
ba95f41acb
commit
af57e7917f
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@ -24,13 +24,7 @@ import the.bytecode.club.bytecodeviewer.obfuscators.rename.RenameClasses;
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import the.bytecode.club.bytecodeviewer.obfuscators.rename.RenameFields;
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import the.bytecode.club.bytecodeviewer.obfuscators.rename.RenameMethods;
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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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import the.bytecode.club.bytecodeviewer.plugin.preinstalled.CodeSequenceDiagram;
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import the.bytecode.club.bytecodeviewer.plugin.preinstalled.ShowAllStrings;
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import the.bytecode.club.bytecodeviewer.plugin.preinstalled.ShowMainMethods;
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import the.bytecode.club.bytecodeviewer.plugin.preinstalled.StackFramesRemover;
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import the.bytecode.club.bytecodeviewer.plugin.preinstalled.ZKMStringDecrypter;
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import the.bytecode.club.bytecodeviewer.plugin.preinstalled.ZStringArrayDecrypter;
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import the.bytecode.club.bytecodeviewer.plugin.preinstalled.*;
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import the.bytecode.club.bytecodeviewer.resources.exporting.Export;
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import the.bytecode.club.bytecodeviewer.util.*;
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import the.bytecode.club.bytecodeviewer.resources.ResourceDecompiling;
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@ -577,7 +571,7 @@ public class MainViewerGUI extends JFrame
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showAllStrings.addActionListener(e -> PluginManager.runPlugin(new ShowAllStrings()));
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replaceStrings.addActionListener(arg0 -> ReplaceStringsOptions.open());
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stackFramesRemover.addActionListener(e -> PluginManager.runPlugin(new StackFramesRemover()));
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allatoriStringDecrypter.addActionListener(e -> PluginManager.runPlugin(new AllatoriStringDecrypter()));
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allatoriStringDecrypter.addActionListener(e -> PluginManager.runPlugin(new AllatoriStringDecrypterOptions()));
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ZKMStringDecrypter.addActionListener(e -> PluginManager.runPlugin(new ZKMStringDecrypter()));
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zStringArrayDecrypter.addActionListener(arg0 -> PluginManager.runPlugin(new ZStringArrayDecrypter()));
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}
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@ -1,9 +1,24 @@
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package the.bytecode.club.bytecodeviewer.plugin.preinstalled;
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import java.awt.*;
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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 org.objectweb.asm.tree.ClassNode;
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import org.objectweb.asm.tree.*;
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import the.bytecode.club.bytecodeviewer.BytecodeViewer;
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import the.bytecode.club.bytecodeviewer.Constants;
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import the.bytecode.club.bytecodeviewer.Resources;
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import the.bytecode.club.bytecodeviewer.api.ASMUtil;
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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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import the.bytecode.club.bytecodeviewer.gui.components.MultipleChoiceDialogue;
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import the.bytecode.club.bytecodeviewer.plugin.PluginManager;
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import javax.swing.*;
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import static the.bytecode.club.bytecodeviewer.Constants.nl;
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/***************************************************************************
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* Bytecode Viewer (BCV) - Java & Android Reverse Engineering Suite *
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@ -24,15 +39,250 @@ import the.bytecode.club.bytecodeviewer.api.Plugin;
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***************************************************************************/
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/**
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* Coming soon.
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* An Allatori String Decrypter, targets an unknown (old) version.
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*
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* @author Konloch
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* @author Szperak
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* @since 08/15/2015
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*/
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public class AllatoriStringDecrypter extends Plugin {
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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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}
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public class AllatoriStringDecrypter extends Plugin
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{
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final PluginConsole frame = new PluginConsole("Allatori String Decrypter");
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final StringBuilder out = new StringBuilder();
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final String className;
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public AllatoriStringDecrypter(String className) {this.className = className;}
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@Override
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public void execute(ArrayList<ClassNode> classNodeList)
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{
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MultipleChoiceDialogue dialogue = new MultipleChoiceDialogue("Bytecode Viewer - WARNING",
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"WARNING: This will load the classes into the JVM and execute the allatori decrypter function"
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+ nl + "for each class. IF THE FILE YOU'RE LOADING IS MALICIOUS, DO NOT CONTINUE.",
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new String[]{"Continue", "Cancel"});
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if (dialogue.promptChoice() == 0)
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{
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try
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{
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if (!className.equals("*"))
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{
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for (ClassNode classNode : classNodeList)
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{
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if (classNode.name.equals(className))
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scanClassNode(classNode);
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}
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}
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else
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{
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for (ClassNode classNode : classNodeList)
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{
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scanClassNode(classNode);
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}
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}
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}
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catch (Exception e)
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{
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new ExceptionUI(e, "github.com/Szperak");
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}
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finally
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{
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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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{
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out.append(msg);
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out.append(Constants.nl);
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}
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public void scanClassNode(ClassNode classNode) throws Exception
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{
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for (MethodNode method : classNode.methods)
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{
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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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{
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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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{
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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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{
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InsnList iList = methodNode.instructions;
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log("Scanning method " + methodNode.name + " of " + classNode.name);
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LdcInsnNode laststringldconstack = null;
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for (AbstractInsnNode i : iList.toArray())
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{
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if (i instanceof LdcInsnNode)
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{
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LdcInsnNode ldci = (LdcInsnNode) i;
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if (ldci.cst instanceof String)
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{
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laststringldconstack = ldci;
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}
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continue;
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}
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else if (i instanceof MethodInsnNode)
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{
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MethodInsnNode methodi = (MethodInsnNode) i;
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if (laststringldconstack != null && methodi.getOpcode() == 0xb8)
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{ // 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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if (decrypterclassname.contains("$"))
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{ // 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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// 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 = ASMUtil.getClassNode(decrypterFileContents);
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if (decrypterclassnode != null)
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{
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MethodNode decryptermethodnode = ASMUtil.getMethodByName(decrypterclassnode, decrypterMethodName);
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if (decryptermethodnode != null)
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{
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String keyString = (getConstantPoolSize(classNode.name) +
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classNode.name +
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methodNode.name +
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getConstantPoolSize(classNode.name)
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);
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int newHashCode = keyString.hashCode();
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scanDecrypter(decryptermethodnode, newHashCode);
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try
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{
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System.out.println("Loading " + decrypterclassname);
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Class<?> decrypterClassList = the.bytecode.club.bytecodeviewer.api.BytecodeViewer
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.loadClassIntoClassLoader(decrypterclassnode);
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String decrypted = invokeDecrypter(decrypterClassList, decrypterMethodName, (String) laststringldconstack.cst);
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if (decrypted != null)
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{
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log("Succesfully invoked decrypter method: " + decrypted);
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laststringldconstack.cst = decrypted;
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iList.remove(methodi);
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}
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}
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catch (IndexOutOfBoundsException | ClassNotFoundException | IOException e)
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{
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e.printStackTrace();
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log("Could not load decrypter class: " + decrypterclassname);
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}
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}
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else
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{
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log("Could not find decrypter method (" + decrypterMethodName + ") of class " + decrypterclassname);
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}
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}
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else
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{
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log("Could not find decrypter ClassNode of class " + decrypterclassname);
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}
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}
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}
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}
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else if (i instanceof InvokeDynamicInsnNode)
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{
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InvokeDynamicInsnNode methodi = (InvokeDynamicInsnNode) i;
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if (methodi.getOpcode() == 0xba)
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{
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// TODO: Safe-reflection deobfuscator here
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// Allatori replaces invokeinterface and invokestatic with invokedynamic
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//log(methodi.bsm.getOwner()+" dot "+methodi.bsm.getName());
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//iList.set(methodi, new MethodInsnNode(0xb8, methodi.bsm.getOwner(), methodi.bsm.getName(), methodi.bsm.getDesc(), false));
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}
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}
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laststringldconstack = null;
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}
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}
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private boolean scanDecrypter(MethodNode decryptermethodnode, int newHashCode)
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{
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InsnList iList = decryptermethodnode.instructions;
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AbstractInsnNode insn = null, removeInsn = null;
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for (AbstractInsnNode i : iList.toArray())
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{
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if (i instanceof MethodInsnNode)
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{
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MethodInsnNode methodi = ((MethodInsnNode) i);
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if ("currentThread".equals(methodi.name)) // find code form this instruction
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{
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insn = i;
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break;
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}
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}
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}
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if (insn == null)
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{
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return false;
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}
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while (insn != null)
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{
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if (insn instanceof MethodInsnNode)
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{
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MethodInsnNode methodi = ((MethodInsnNode) insn);
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if ("hashCode".equals(methodi.name)) // to this instruction
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{
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break;
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}
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}
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removeInsn = insn;
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insn = insn.getNext();
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iList.remove(removeInsn); // and remove it
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}
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if (insn == null) return false;
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iList.set(insn, new LdcInsnNode(newHashCode)); // then replace it with pre-computed key LDC
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return true;
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}
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private String invokeDecrypter(Class<?> decrypterclass, String name, String arg) throws Exception
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{
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try
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{
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Method decrypterMethod = decrypterclass.getDeclaredMethod(name, String.class);
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decrypterMethod.setAccessible(true);
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return (String) decrypterMethod.invoke(null, arg);
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}
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catch (Exception e)
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{
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log("Could not invoke decrypter method: " + name + " of class " + decrypterclass.getName());
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throw e;
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}
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}
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}
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@ -0,0 +1,85 @@
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package the.bytecode.club.bytecodeviewer.plugin.preinstalled;
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import org.objectweb.asm.tree.*;
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import the.bytecode.club.bytecodeviewer.Resources;
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import the.bytecode.club.bytecodeviewer.api.Plugin;
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import the.bytecode.club.bytecodeviewer.plugin.PluginManager;
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import javax.swing.*;
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import java.awt.*;
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import java.util.ArrayList;
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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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* An Allatori String Decrypter, targets an unknown version.
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*
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* @author Konloch
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* @author Szperak
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* @since 08/15/2015
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*/
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public class AllatoriStringDecrypterOptions extends Plugin
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{
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@Override
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public void execute(ArrayList<ClassNode> classNodeList)
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{
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new AllatoriStringDecrypterOptionsFrame().setVisible(true);
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}
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public static class AllatoriStringDecrypterOptionsFrame extends JFrame
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{
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private JTextField textField;
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public AllatoriStringDecrypterOptionsFrame()
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{
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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 String 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(arg0 ->
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{
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PluginManager.runPlugin(new the.bytecode.club.bytecodeviewer.plugin.preinstalled.AllatoriStringDecrypter(textField.getText()));
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dispose();
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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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}
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}
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