ADS1SecurityManager.java

package ads1ss13.pa;

import java.io.FileDescriptor;
import java.net.InetAddress;
import java.security.Permission;


/**
 * SecurityManager für das ADS2 Framework.
 * 
 * <p>
 * <b>WICHTIG:</b> Nehmen Sie keine &Auml;nderungen in dieser Klasse vor. Bei
 * der Abgabe werden diese &Auml;nderungen verworfen und es k&ouml;nnte dadurch
 * passieren, dass Ihr Programm somit nicht mehr korrekt funktioniert.
 * </p>
 */
public class ADS1SecurityManager extends SecurityManager {
	
	static private Class<? extends Object> userclass = MKP.class;

	@Override
	public void checkPermission(Permission perm) {
		for (Object x : this.getClassContext()) {
			if (x.equals(userclass)) {
				throw new SecurityException("setSecurityManager: " + x);
			} else if (x.equals(Main.class)) {
				return;
			}
		}
		super.checkPermission(perm);
	}

	/**
	 * Erzeugt einen neuen SecurityManager
	 * 
	 */
	public ADS1SecurityManager() {
		super();
	}

	@Override
	public void checkAccept(String arg0, int arg1) {
		checkOrigin("ServerSocket.accept()");
	}

	@Override
	public void checkAccess(Thread arg0) {
//		checkOrigin("Thread access");
		super.checkAccess(arg0);
	}

	@Override
	public void checkAccess(ThreadGroup arg0) {
//		checkOrigin("ThreadGroup access");
		super.checkAccess(arg0);
	}

	@Override
	public void checkConnect(String arg0, int arg1) {
		checkOrigin("Socket.connect()");
	}

	@Override
	public void checkConnect(String arg0, int arg1, Object arg2) {
		checkOrigin("Socket.connect()");
	}

	@Override
	public void checkCreateClassLoader() {
		checkOrigin("Create ClassLoader");
	}

	@Override
	public void checkDelete(String arg0) {
		checkOrigin("File.delete()");
	}

	@Override
	public void checkExec(String arg0) {
		checkOrigin("Runtime.exec()");
	}

	@Override
	public void checkExit(int status) {
		checkOrigin("System.exit()");
	}

	@Override
	public void checkLink(String arg0) {
		checkOrigin("Runtime.load()/loadLibrary()");
	}

	@Override
	public void checkListen(int arg0) {
		checkOrigin("Listen to port");
	}

	@Override
	public void checkMulticast(InetAddress arg0) {
		checkOrigin("Multicast");
	}

	private void checkOrigin(String type) throws SecurityException {

		for (Object x : this.getClassContext()) {
			if (x.equals(userclass)) {
				throw new SecurityException(type + ": " + x);
			} else if (x.equals(Main.class)) {
				return;
			}
		}

		throw new SecurityException(type);
	}

	@Override
	public void checkPrintJobAccess() {
		checkOrigin("Print");
	}

	@Override
	public void checkPropertiesAccess() {
		checkOrigin("System.set/getProperties()");
	}

	@Override
	public void checkPropertyAccess(String arg0) {
		checkOrigin("System.getProperty(" + arg0 + ")");
	}

	@Override
	public void checkRead(FileDescriptor arg0) {
	}

	@Override
	public void checkRead(String arg0) {
	}

	@Override
	public void checkRead(String arg0, Object arg1) {
	}

	@Override
	public void checkSetFactory() {
		checkOrigin("Set Socket/ServerSocket/URL Factory");
	}

	@Override
	public void checkSystemClipboardAccess() {
		checkOrigin("SystemClipboard access");
	}

	@Override
	public void checkWrite(FileDescriptor arg0) {
		checkOrigin("Write FileDescriptor");
	}

	@Override
	public void checkWrite(String arg0) {
		checkOrigin("Write File");
	}

}