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Merge pull request #127 from dorving/client-handshake-checks

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Wrapped RC4 table checks in try catch block (#106)
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sirjonasxx 2022-05-03 06:28:57 +02:00 committed by GitHub
commit 5ac1593dae
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 37 additions and 40 deletions
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G-Earth/src/main/java/gearth/protocol/memory/Rc4Obtainer.java
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@ -3,25 +3,20 @@ package gearth.protocol.memory;
import gearth.GEarth;
import gearth.protocol.HConnection;
import gearth.protocol.HMessage;
import gearth.protocol.HPacket;
import gearth.protocol.crypto.RC4;
import gearth.protocol.memory.habboclient.HabboClient;
import gearth.protocol.memory.habboclient.HabboClientFactory;
import gearth.protocol.packethandler.PayloadBuffer;
import gearth.protocol.packethandler.flash.BufferChangeListener;
import gearth.protocol.packethandler.flash.FlashPacketHandler;
import gearth.protocol.packethandler.PayloadBuffer;
import gearth.ui.titlebar.TitleBarController;
import javafx.application.Platform;
import javafx.scene.control.Alert;
import javafx.scene.control.ButtonType;
import javafx.scene.control.Hyperlink;
import javafx.scene.control.Label;
import javafx.scene.image.Image;
import javafx.scene.layout.FlowPane;
import javafx.scene.layout.Region;
import javafx.scene.layout.VBox;
import javafx.scene.web.WebView;
import javafx.stage.Stage;
import java.io.IOException;
import java.util.Arrays;
@ -31,17 +26,15 @@ public class Rc4Obtainer {
public static final boolean DEBUG = false;
private HabboClient client;
private final HabboClient client;
private List<FlashPacketHandler> flashPacketHandlers;
public Rc4Obtainer(HConnection hConnection) {
client = HabboClientFactory.get(hConnection);
}
public void setFlashPacketHandlers(FlashPacketHandler... flashPacketHandlers) {
this.flashPacketHandlers = Arrays.asList(flashPacketHandlers);
for (FlashPacketHandler handler : flashPacketHandlers) {
BufferChangeListener bufferChangeListener = new BufferChangeListener() {
@Override
@ -54,12 +47,8 @@ public class Rc4Obtainer {
};
handler.getBufferChangeObservable().addListener(bufferChangeListener);
}
}
private void onSendFirstEncryptedMessage(FlashPacketHandler flashPacketHandler) {
if (!HConnection.DECRYPTPACKETS) return;
@ -82,7 +71,6 @@ public class Rc4Obtainer {
if (!worked) {
System.err.println("COULD NOT FIND RC4 TABLE");
Platform.runLater(() -> {
Alert alert = new Alert(Alert.AlertType.WARNING, "Something went wrong!", ButtonType.OK);
@ -97,65 +85,74 @@ public class Rc4Obtainer {
alert.getDialogPane().setMinHeight(Region.USE_PREF_SIZE);
alert.getDialogPane().setContent(fp);
alert.setOnCloseRequest(event -> {
GEarth.main.getHostServices().showDocument(link.getText());
});
alert.setOnCloseRequest(event -> GEarth.main.getHostServices().showDocument(link.getText()));
try {
TitleBarController.create(alert).showAlert();
} catch (IOException e) {
e.printStackTrace();
}
});
}
long endTime = System.currentTimeMillis();
if (DEBUG) {
final long endTime = System.currentTimeMillis();
if (DEBUG)
System.out.println("Cracked RC4 in " + (endTime - startTime) + "ms");
}
flashPacketHandlers.forEach(FlashPacketHandler::unblock);
}).start();
}
private boolean onSendFirstEncryptedMessage(FlashPacketHandler flashPacketHandler, List<byte[]> potentialRC4tables) {
for (byte[] possible : potentialRC4tables) {
byte[] encBuffer = new byte[flashPacketHandler.getEncryptedBuffer().size()];
for (int i = 0; i < encBuffer.length; i++) {
encBuffer[i] = flashPacketHandler.getEncryptedBuffer().get(i);
for (byte[] possible : potentialRC4tables)
if (isCorrectRC4Table(flashPacketHandler, possible))
return true;
return false;
}
private boolean isCorrectRC4Table(FlashPacketHandler flashPacketHandler, byte[] possible) {
try {
final byte[] encBuffer = new byte[flashPacketHandler.getEncryptedBuffer().size()];
for (int i = 0; i < encBuffer.length; i++)
encBuffer[i] = flashPacketHandler.getEncryptedBuffer().get(i);
for (int i = 0; i < 256; i++) {
for (int j = 0; j < 256; j++) {
byte[] keycpy = Arrays.copyOf(possible, possible.length);
RC4 rc4Tryout = new RC4(keycpy, i, j);
if (flashPacketHandler.getMessageSide() == HMessage.Direction.TOSERVER) rc4Tryout.undoRc4(encBuffer);
final byte[] keycpy = Arrays.copyOf(possible, possible.length);
final RC4 rc4Tryout = new RC4(keycpy, i, j);
if (flashPacketHandler.getMessageSide() == HMessage.Direction.TOSERVER)
rc4Tryout.undoRc4(encBuffer);
if (rc4Tryout.couldBeFresh()) {
byte[] encDataCopy = Arrays.copyOf(encBuffer, encBuffer.length);
RC4 rc4TryCopy = rc4Tryout.deepCopy();
final byte[] encDataCopy = Arrays.copyOf(encBuffer, encBuffer.length);
final RC4 rc4TryCopy = rc4Tryout.deepCopy();
try {
PayloadBuffer payloadBuffer = new PayloadBuffer();
byte[] decoded = rc4TryCopy.rc4(encDataCopy);
HPacket[] checker = payloadBuffer.pushAndReceive(decoded);
final PayloadBuffer payloadBuffer = new PayloadBuffer();
final byte[] decoded = rc4TryCopy.rc4(encDataCopy);
payloadBuffer.pushAndReceive(decoded);
if (payloadBuffer.peak().length == 0) {
flashPacketHandler.setRc4(rc4Tryout);
return true;
}
} catch (Exception e) {
// e.printStackTrace();
}
}
e.printStackTrace();
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
return false;
}
}