gistfile1.java

	@SuppressWarnings("rawtypes")
	public boolean isExploit(NbtCompound root) {
		// Item
		if (root.containsKey("SkullOwner")) {
			NbtCompound skullOwner = root.getCompound("SkullOwner");
			if (skullOwner.containsKey("Properties")) {
				NbtCompound properties = skullOwner.getCompound("Properties");
				if (properties.containsKey("textures")) {
					NbtList<NbtBase> textures = properties.getList("textures");
					for (NbtBase texture : textures.asCollection()) {
						if (texture instanceof NbtCompound) {
							if (!((NbtCompound) texture).containsKey("Signature")) {
								// Check for value
								if (((NbtCompound) texture).containsKey("Value")) {
									// easy bypass. add to Value "==" and others symbols
									if (((NbtCompound) texture).getString("Value").trim().length() > 0) {
										return false;
									}
								}
								root.remove("SkullOwner");
								return true;
							}

							if (((NbtCompound) texture).containsKey("Signature")) {
								NbtCompound text = (NbtCompound) texture;

								if (text.getString("Signature").equals("")) {
									root.remove("SkullOwner");
									return true;
								}
							}

							if (((NbtCompound) texture).containsKey("Value")) {
								NbtCompound text = (NbtCompound) texture;

								if (text.getString("Value").equals("")) {
									root.remove("SkullOwner");
									return true;
								}
							}
						}
					}
				}
			}
		}
		// Block
		if (root.containsKey("Owner")) {
			NbtCompound skullOwner = root.getCompound("Owner");
			if (skullOwner.containsKey("Properties")) {
				NbtCompound properties = skullOwner.getCompound("Properties");
				if (properties.containsKey("textures")) {
					NbtList<NbtBase> textures = properties.getList("textures");
					for (NbtBase texture : textures.asCollection()) {
						if (texture instanceof NbtCompound) {
							if (!((NbtCompound) texture).containsKey("Signature")) {
								if (((NbtCompound) texture).containsKey("Value")) {
									if (((NbtCompound) texture).getString("Value").trim().length() > 0) {
										return false;
									}
								}
								root.remove("Owner");
								return true;
							}
							
							if (((NbtCompound) texture).containsKey("Signature")) {
								NbtCompound text = (NbtCompound) texture;

								if (text.getString("Signature").equals("")) {
									root.remove("Owner");
									return true;
								}
							}

							if (((NbtCompound) texture).containsKey("Value")) {
								NbtCompound text = (NbtCompound) texture;

								if (text.getString("Value").equals("")) {
									root.remove("Owner");
									return true;
								}
							}
						}
					}
				}
			}
		}
		return false;
	}