Adding shit

2026-07-01 10:18:26 +00:00 · 2022-09-01 12:36:27 -04:00
parent 35345f4515
commit f8a41744d1
7 changed files with 217 additions and 397 deletions
@@ -0,0 +1,98 @@
+package dev.brighten.ac.utils;
+
+import dev.brighten.ac.Anticheat;
+import dev.brighten.ac.utils.reflections.Reflections;
+import dev.brighten.ac.utils.reflections.types.WrappedClass;
+import dev.brighten.ac.utils.reflections.types.WrappedMethod;
+import it.unimi.dsi.fastutil.longs.LongArrayList;
+import it.unimi.dsi.fastutil.longs.LongList;
+import lombok.SneakyThrows;
+import org.bukkit.plugin.InvalidDescriptionException;
+import org.bukkit.plugin.Plugin;
+import org.bukkit.plugin.PluginDescriptionFile;
+
+import java.io.*;
+import java.nio.ByteBuffer;
+import java.util.Arrays;
+import java.util.zip.CRC32;
+
+public class IntegrityCheck {
+
+    private static WrappedClass classSystem = Reflections.getClass("java.lang.System");
+    private static WrappedMethod exitMethod = classSystem.getMethod("exit", int.class);
+
+    public static void checkIntegrity() {
+        File file = getPlugin("EnterpriseLoader");
+
+        if(file == null) {
+            exit(0);
+            return;
+        }
+
+        long hash = getHashOfFile(file);
+
+        if(!acceptableHashes.contains(hash)) {
+            System.out.println("Bad loader file!");
+            exit(0);
+        }
+    }
+
+    private static void exit(int number) {
+        exitMethod.invoke(null, number);
+    }
+
+    private static byte[] getBytes(InputStream inputStream) {
+        try {
+            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
+            int nRead;
+            byte[] data = new byte[16384];
+            while ((nRead = inputStream.read(data, 0, data.length)) != -1) {
+                buffer.write(data, 0, nRead);
+            }
+            return buffer.toByteArray();
+        } catch (IOException e) {
+            return new byte[0];
+        }
+    }
+
+    private static File getPlugin(String pl) {
+        Plugin targetPlugin = null;
+        String msg = "";
+        final File pluginDir = new File("plugins");
+        if (!pluginDir.isDirectory()) {
+            return null;
+        }
+        File pluginFile = new File(pluginDir, pl + ".jar");
+        if (!pluginFile.isFile()) {
+            for (final File f : pluginDir.listFiles()) {
+                try {
+                    if (f.getName().endsWith(".jar")) {
+                        final PluginDescriptionFile pdf = Anticheat.INSTANCE.getPluginInstance()
+                                .getPluginLoader().getPluginDescription(f);
+                        if (pdf.getName().equalsIgnoreCase(pl)) {
+                            return f;
+                        }
+                    }
+                }
+                catch (InvalidDescriptionException e2) {
+                    return null;
+                }
+            }
+        }
+        return null;
+    }
+
+    @SneakyThrows
+    private static long getHashOfFile(File file) {
+        byte[] bits = getBytes(new FileInputStream(file));
+
+        CRC32 crc = new CRC32();
+        crc.update(ByteBuffer.wrap(bits));
+
+        return crc.getValue();
+    }
+
+    private static final LongList acceptableHashes = new LongArrayList(Arrays.asList(3436861907L, 679626389L));
+
+
+}