import java.awt.*; 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.util.*; import the.bytecode.club.bytecodeviewer.api.Plugin; import the.bytecode.club.bytecodeviewer.decompilers.FernFlowerDecompiler; /** * @author jowasp */ public class XposedGenerator extends Plugin { //PRIVATE private static List methodsNames = new ArrayList(); private static List cleanMethodsNames = new ArrayList(); private static String foundpckg; public XposedGenerator() {} @Override public void execute(ArrayList classNodeList) { //Get actual file class content final Component tabComp = BytecodeViewer.viewer.workPane.tabs.getSelectedComponent(); if(tabComp == null) { JOptionPane.showMessageDialog(null, "Open A Class First"); return; } String className = tabComp.getName(); String containerName = ((FileContainer)BytecodeViewer.files.get(0)).name; ClassNode classnode = BytecodeViewer.getCurrentlyOpenedClassNode(); //Call XposedGenerator class ParseChosenFileContent(className,containerName,classnode); } public static void ParseChosenFileContent(String classname, String containerName, ClassNode classNode){ try{ //Parse content - Extract methods after APK /JAR has been extracted byte[] cont = BytecodeViewer.getFileContents(classname.toString()); //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 an a list List methodsExtracted = ProcessContentExtractedClass(decomp); String packgExtracted = ProcessContentExtractedPackage(decomp); System.out.println("PACKAGE NAME: " +packgExtracted); //Get a clean list List cleanMethods = null; //clear list cleanMethods = ProcessCleanMethodsAll(methodsExtracted); if (!cleanMethods.isEmpty()) { JComboBox cb = new JComboBox<>(cleanMethods.toArray(new String[cleanMethods.size()])); //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); if (result == JOptionPane.OK_OPTION) { //Read Chosen Class System.out.println("SELECTED CLASS is" + cb.getSelectedItem()); String selectedClass = cb.getSelectedItem().toString(); String selectedXposedTemplate = xposedTemplateList.getSelectedItem().toString(); //WriteXposed Class with extracted data try{ WriteXposedModule(selectedClass, packgExtracted, classname, selectedXposedTemplate); } catch(IllegalArgumentException e) { e.printStackTrace(); JOptionPane.showMessageDialog(null,"Error" + e.toString()); } } } else { JOptionPane.showMessageDialog(null,"Class Not Suitable"); } } catch (IllegalArgumentException e) { e.printStackTrace(); JOptionPane.showMessageDialog(null,"Error" + e.toString()); } } public static void WriteXposedModule(String functionToHook, String packageName, String classToHook, String template) { System.out.println("TEMPLATE: " + template); if (template != null && !template.equals("Empty")) { try { //TODO: Prompt save dialogue File file = new File("./XposedClassTest.java"); // if file doesn't exists, then create it if (!file.exists()) { file.createNewFile(); } //Extract the package name only String packageNameOnly = packageName.substring(8,packageName.length() - 2 ); String classToHookNameOnly = classToHook.substring(0, packageName.length() - 9); String[] classClean = classToHookNameOnly.split("\\/"); String[] functionSplitValues = functionToHook.split("\\s+"); //select String onlyClass = classClean[classClean.length-1]; //String onlyFunctionParateses = functionSplitValues[functionSplitValues.length-2]; String onlyFunction = CleanUpFuunction(functionSplitValues); //String functionToHookOnly = "dummy function"; System.out.println(onlyClass); System.out.println(packageNameOnly); //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" + " 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" + "}"+ "\r\n" ; FileWriter fw = new FileWriter(file.getAbsoluteFile()); BufferedWriter bw = new BufferedWriter(fw); bw.write(XposedClassText); bw.write("\r\n"); bw.close(); System.out.println("Done"); JOptionPane.showMessageDialog(null,"Xposed Module Generated"); } catch (IOException e) { JOptionPane.showMessageDialog(null,"Error" + e.toString()); e.printStackTrace(); } } else { JOptionPane.showMessageDialog(null,"Empty Template Chosen, Did Not Generate"); } } private static List ProcessContentExtractedClass(String contentFile){ Scanner scanner = null; try{ scanner = new Scanner(contentFile); //@TODO : Improve patterns to match other excepts 'public' String regexclass = "public"; //String regexPkg = "package"; Pattern pattern = Pattern.compile(regexclass, Pattern.CASE_INSENSITIVE); //Pattern patternVoid = Pattern.compile(regexVoid , Pattern.CASE_INSENSITIVE); // Pattern patternPkg = Pattern.compile(regexPkg , Pattern.CASE_INSENSITIVE); //scanner.useDelimiter(";"); 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())) ; methodsNames.add(quote(line.trim())); } else { methodsNames.add("No methods found"); } } } if (methodsNames.isEmpty()) { methodsNames.add("No methods found"); } else { return methodsNames; } return methodsNames; } finally { if (scanner!=null) scanner.close(); } } private static List ProcessCleanMethodsAll(List 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("(")))) { continue; } else { cleanMethodsNames.add(m); } } return cleanMethodsNames; } private static String CleanUpFuunction(String[] rawFunction) { String onlyFunc = "functiondummy"; for (String m:rawFunction) { if(m.contains("(")) { String[] functions = m.split("[ ,()]+"); onlyFunc = functions[functions.length -1]; return onlyFunc; } else { continue; } } 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.isEmpty() || foundpckg == null) foundpckg = "No Package Found"; } catch(NullPointerException e) { JOptionPane.showMessageDialog(null,"Error - no package was found in the selected class: " + e.toString()); } finally { if(scanner != null) scanner.close(); } } catch(IllegalArgumentException e) { JOptionPane.showMessageDialog(null,"Error" + e.toString()); 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; } }