bytecode-viewer/plugins/java/XposedGenerator.java at master · strivegithub/bytecode-viewer · GitHub

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import java.io.BufferedWriter;

import java.io.File;

import java.io.FileWriter;

import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

import java.util.Scanner;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

import javax.swing.Box;

import javax.swing.JComboBox;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

import org.objectweb.asm.tree.ClassNode;

import the.bytecode.club.bytecodeviewer.*;

import the.bytecode.club.bytecodeviewer.api.*;

import the.bytecode.club.bytecodeviewer.decompilers.impl.FernFlowerDecompiler;

import the.bytecode.club.bytecodeviewer.gui.resourceviewer.viewer.ResourceViewer;

/**

* * This is an Xposed Generator Plugin, used to aid Reverse-Engineering.

* *

* * @author jowasp

**/

public class XposedGenerator extends Plugin

{

private static final List<String> methodsNames = new ArrayList<>();

private static final List<String> cleanMethodsNames = new ArrayList<>();

private static String foundPckg;

@Override

public void execute(List<ClassNode> classNodeList)

{

//Get actual file class content

ResourceViewer viewer = BytecodeViewer.getActiveResource();

if (viewer == null)

{

BytecodeViewer.showMessage("Open A Classfile First");

return;

}

String className = viewer.getName();

ClassNode classnode = BytecodeViewer.getCurrentlyOpenedClassNode();

if (classnode == null)

{

BytecodeViewer.showMessage("Open A Classfile First");

return;

}

//Call XposedGenerator class

parseChosenFileContent(className, classnode);

}

public static void parseChosenFileContent(String classname, ClassNode classNode)

{

try

{

//Parse content - Extract methods after APK /JAR has been extracted

byte[] cont = ASMUtil.nodeToBytes(classNode);

//Use one of the decompilers

//TODO:Allow users to select other decompilers?

FernFlowerDecompiler decompilefern = new FernFlowerDecompiler();

//Decompile using Fern

String decomp = decompilefern.decompileClassNode(classNode, cont);

String[] xposedTemplateTypes = {"Empty", "Parameters", "Helper"};

@SuppressWarnings({"unchecked", "rawtypes"})

JComboBox xposedTemplateList = new JComboBox(xposedTemplateTypes);

//Set results of parsed methods into a list

List<String> methodsExtracted = ProcessContentExtractedClass(decomp);

String packgExtracted = ProcessContentExtractedPackage(decomp);

//Get a clean list

List<String> cleanMethods;

//clear list

cleanMethods = ProcessCleanMethodsAll(methodsExtracted);

if (!cleanMethods.isEmpty())

{

JComboBox<String> cb = new JComboBox<>(cleanMethods.toArray(new String[0]));

//Add Panel elements

//Start Panel

JPanel myPanel = new JPanel();

myPanel.add(Box.createHorizontalStrut(15));

myPanel.add(xposedTemplateList);

myPanel.add(cb);

//output methods to pane box

int result = JOptionPane.showConfirmDialog(null, myPanel, "Choose Template and Method for Xposed Module", JOptionPane.OK_CANCEL_OPTION);

myPanel.remove();

if (result == JOptionPane.OK_OPTION)

{

//Read Chosen Class

Object cbItem = cb.getSelectedItem();

Object xPosedItem = xposedTemplateList.getSelectedItem();

System.out.println("SELECTED CLASS is" + cbItem);

if (cbItem != null && xPosedItem != null)

{

String selectedClass = cbItem.toString();

String selectedXposedTemplate = xPosedItem.toString();

//WriteXposed Class with extracted data

try

{

WriteXposedModule(selectedClass, packgExtracted, classname, selectedXposedTemplate);

}

catch (IllegalArgumentException e)

{

e.printStackTrace();

JOptionPane.showMessageDialog(null, "Error" + e);

}

else

{

JOptionPane.showMessageDialog(null, "Class Not Suitable");

}

catch (IllegalArgumentException e)

{

e.printStackTrace();

JOptionPane.showMessageDialog(null, "Error" + e);

}

public static void WriteXposedModule(String functionToHook, String packageName, String classToHook, String template)

{

if (template != null && !template.equals("Empty"))

{

try

{

//Extract the package name only

String packageNameOnly = packageName.substring(8, packageName.length() - 2).trim();

String classToHookNameOnly = classToHook;

if (classToHookNameOnly.endsWith(".class"))

classToHookNameOnly = classToHook.substring(0, classToHookNameOnly.length() - 6);

String[] classClean = classToHookNameOnly.split("/");

String[] functionSplitValues = functionToHook.split("\\s+");

//select

String onlyClass = classClean[classClean.length - 1];

String onlyFunction = CleanUpFunction(functionSplitValues);

//Write Xposed Class

String XposedClassText = "package androidpentesting.com.xposedmodule;" + "\r\n"

+ "import de.robv.android.xposed.IXposedHookLoadPackage;" + "\r\n" + "\r\n"

+ "import de.robv.android.xposed.XC_MethodHook;" + "\r\n"

+ "import de.robv.android.xposed.XposedBridge;" + "\r\n"

+ "import de.robv.android.xposed.callbacks.XC_LoadPackage.LoadPackageParam;" + "\r\n"

+ "import static de.robv.android.xposed.XposedHelpers.findAndHookMethod;" + "\r\n" + "\r\n"

+ "public class XposedClassTest implements IXposedHookLoadPackage {" + "\r\n" + "\r\n"

+ " public void handleLoadPackage(final LoadPackageParam lpparam) throws Throwable {" + "\r\n" + "\r\n"

+ " String classToHook = " + "\"" + packageNameOnly + "." + onlyClass + "\";" + "\r\n"

+ " String functionToHook = " + "\"" + onlyFunction + "\";" + "\r\n" + "\r\n"

+ " if (lpparam.packageName.equals(" + "\"" + packageNameOnly + "\"" + ")){" + "\r\n"

+ " XposedBridge.log(" + "\" Loaded app: \" " + " + lpparam.packageName);" + "\r\n" + "\r\n"

+ " findAndHookMethod(" + "\"" + onlyClass + "\"" + ", lpparam.classLoader, " + " \"" + onlyFunction + "\"" + ", int.class," + "\r\n"

+ " new XC_MethodHook() {" + "\r\n"

+ " @Override" + "\r\n"

+ " protected void beforeHookedMethod(MethodHookParam param) throws Throwable {" + "\r\n"

+ " //TO BE FILLED BY ANALYST" + "\r\n"

+ " }" + "\r\n"

+ " });" + "\r\n"

+ " }" + "\r\n"

+ "}" + "\r\n";

PluginConsole gui = new PluginConsole("Xposed Code Generation");

gui.appendText(XposedClassText);

gui.setVisible(true);

}

catch (Exception e)

{

e.printStackTrace();

}

else

{

JOptionPane.showMessageDialog(null, "Empty Template Chosen, Did Not Generate");

}

private static List<String> ProcessContentExtractedClass(String contentFile)

{

Scanner scanner = null;

try

{

scanner = new Scanner(contentFile);

//@TODO : Improve patterns to match other excepts 'public'

String regexclass = "public";

Pattern pattern = Pattern.compile(regexclass, Pattern.CASE_INSENSITIVE);

while (scanner.hasNextLine())

{

String line = scanner.nextLine();

// process the line

Matcher matcher = pattern.matcher(line);

while (matcher.find())

{

if (matcher.group() != null)

{

System.out.println("find() found the pattern \"" + quote(line.trim()));

System.out.println("Function: " + CleanUpFunction(line.trim().split("\\s+")));

methodsNames.add(quote(line.trim()));

}

else

{

methodsNames.add("No methods found");

}

if (methodsNames.isEmpty())

methodsNames.add("No methods found");

else

return methodsNames;

}

finally

{

if (scanner != null)

scanner.close();

}

private static List<String> ProcessCleanMethodsAll(List<String> rawMethods)

{

for (String m : rawMethods)

{

//Exclude class declaration

//TODO:add a list containing all possible types

if (!m.contains("extends") && (!m.contains("implements") && (m.contains("("))))

{

cleanMethodsNames.add(m);

}

return cleanMethodsNames;

}

private static String CleanUpFunction(String[] rawFunction)

{

String onlyFunc = "functiondummy";

for (String m : rawFunction)

{

if (m.contains("("))

{

String[] split = m.split("\\(")[0].split(" ");

return split[split.length - 1];

}

return onlyFunc;

}

private static String ProcessContentExtractedPackage(String contentFile)

{

Scanner scanner = null;

try

{

scanner = new Scanner(contentFile);

String regexPkg = "package";

Pattern patternPkg = Pattern.compile(regexPkg, Pattern.CASE_INSENSITIVE);

String line = scanner.nextLine();

// process the line

Matcher matcher = patternPkg.matcher(line);

while (matcher.find())

{

if (matcher.group() != null)

{

System.out.println("find() found the pattern \"" + quote(line.trim()));

foundPckg = quote(line.trim());

}

else

{

foundPckg = "";

}

try

{

if (foundPckg == null || foundPckg.isEmpty())

foundPckg = "No Package Found";

}

catch (NullPointerException e)

{

JOptionPane.showMessageDialog(null, "Error - no package was found in the selected class: " + e);

}

finally

{

scanner.close();

}

catch (IllegalArgumentException e)

{

JOptionPane.showMessageDialog(null, "Error" + e);

if (scanner != null)

scanner.close();

}

finally

{

if (scanner != null)

scanner.close();

}

return foundPckg;

}

private static String quote(String aText)

{

String QUOTE = "'";

return QUOTE + aText + QUOTE;

}

bytecode-viewer/plugins/java/XposedGenerator.java at master · strivegithub/bytecode-viewer · GitHub

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