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Improve screen printing.

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This commit is contained in:
Andy Nguyen 2024-12-06 09:51:16 +01:00
parent 20c77c4f47
commit f3a31c611e
2 changed files with 21 additions and 16 deletions
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12
src/com/bdjb/Loader.java
View File

@ -23,6 +23,8 @@ class Loader implements Runnable {
private static final String MAIN_METHOD_NAME = "main"; private static final String MAIN_METHOD_NAME = "main";
private static final String PRINTLN_METHOD_NAME = "println"; private static final String PRINTLN_METHOD_NAME = "println";
private static final int JAR_PORT = 9025;
static void startJarLoader() { static void startJarLoader() {
new Thread(new Loader()).start(); new Thread(new Loader()).start();
} }
@ -31,10 +33,10 @@ class Loader implements Runnable {
Screen.println("[+] bd-jb by theflow"); Screen.println("[+] bd-jb by theflow");
while (true) { while (true) {
Screen.println("[*] Listening for remote JAR on port 9025..."); Screen.println("[*] Listening for JAR on port " + JAR_PORT + "...");
try { try {
ServerSocket serverSocket = new ServerSocket(9025); ServerSocket serverSocket = new ServerSocket(JAR_PORT);
Socket socket = serverSocket.accept(); Socket socket = serverSocket.accept();
InputStream inputStream = socket.getInputStream(); InputStream inputStream = socket.getInputStream();
OutputStream outputStream = new FileOutputStream(MNT_ADA_JAR_FILE); OutputStream outputStream = new FileOutputStream(MNT_ADA_JAR_FILE);
@ -49,7 +51,7 @@ class Loader implements Runnable {
outputStream.close(); outputStream.close();
inputStream.close(); inputStream.close();
socket.close();
serverSocket.close(); serverSocket.close();
Screen.println("[+] Received " + total + " bytes"); Screen.println("[+] Received " + total + " bytes");
@ -59,10 +61,10 @@ class Loader implements Runnable {
DVBClassLoader dvbClassLoader = DVBClassLoader dvbClassLoader =
DVBClassLoader.newInstance(new URL[] {new URL("file://" + MNT_ADA_JAR_FILE)}); DVBClassLoader.newInstance(new URL[] {new URL("file://" + MNT_ADA_JAR_FILE)});
Class exploitClass = dvbClassLoader.loadClass(EXPLOIT_CLASS_NAME); Class exploitClass = dvbClassLoader.loadClass(EXPLOIT_CLASS_NAME);
Method main = exploitClass.getMethod(MAIN_METHOD_NAME, new Class[] {Method.class}); Method exploitMain = exploitClass.getMethod(MAIN_METHOD_NAME, new Class[] {Method.class});
Method screenPrintln = Method screenPrintln =
Screen.class.getMethod(PRINTLN_METHOD_NAME, new Class[] {String.class}); Screen.class.getMethod(PRINTLN_METHOD_NAME, new Class[] {String.class});
main.invoke(null, new Object[] {screenPrintln}); exploitMain.invoke(null, new Object[] {screenPrintln});
Screen.println("[+] JAR exited"); Screen.println("[+] JAR exited");
} catch (Exception e) { } catch (Exception e) {

25
src/com/bdjb/Screen.java
View File

@ -12,19 +12,22 @@ import java.awt.Container;
import java.awt.Font; import java.awt.Font;
import java.awt.Graphics; import java.awt.Graphics;
import java.lang.reflect.Method; import java.lang.reflect.Method;
import java.util.ArrayList;
public class Screen extends Container { public class Screen extends Container {
private static final long serialVersionUID = 0x4141414141414141L; private static final long serialVersionUID = 0x4141414141414141L;
private static final Font FONT = new Font(null, Font.PLAIN, 40); private static final int MAX_LINES = 32;
private static final ArrayList messages = new ArrayList(); private static final Font FONT = new Font(null, Font.PLAIN, 32);
private static final String[] lines = new String[MAX_LINES];
private static final Screen instance = new Screen(); private static final Screen instance = new Screen();
private static Method remoteScreenPrintln = null; private static Method remoteScreenPrintln = null;
private static int currentLine = 0;
public static Screen getInstance() { public static Screen getInstance() {
return instance; return instance;
} }
@ -33,7 +36,7 @@ public class Screen extends Container {
remoteScreenPrintln = screenPrintln; remoteScreenPrintln = screenPrintln;
} }
public static void println(String msg) { public static synchronized void println(String msg) {
if (remoteScreenPrintln != null) { if (remoteScreenPrintln != null) {
try { try {
remoteScreenPrintln.invoke(null, new Object[] {msg}); remoteScreenPrintln.invoke(null, new Object[] {msg});
@ -41,7 +44,8 @@ public class Screen extends Container {
// Ignore. // Ignore.
} }
} else { } else {
messages.add(msg); lines[currentLine] = msg;
currentLine = (currentLine + 1) % MAX_LINES;
instance.repaint(); instance.repaint();
} }
} }
@ -49,14 +53,13 @@ public class Screen extends Container {
public void paint(Graphics g) { public void paint(Graphics g) {
g.setFont(FONT); g.setFont(FONT);
g.setColor(Color.WHITE); g.setColor(Color.WHITE);
g.clearRect(0, 0, getWidth(), getHeight());
int x = 80; int x = 64;
int y = 80; int y = 64;
int height = g.getFontMetrics().getHeight(); int height = g.getFontMetrics().getHeight();
for (int i = 0; i < messages.size(); i++) { for (int i = 0; i < lines.length; i++) {
String msg = (String) messages.get(i); g.drawString(lines[i], x, y + i * height);
g.drawString(msg, x, y);
y += height;
} }
} }
} }