Java encryption classloader

stacktrace

2011-10-11 14:59:58.401:WARN::FAILED encodingFilter: java.lang.IllegalStateException: class org.springframework.web.filter.CharacterEncodingFilter is not a javax.servlet.Filter
2011-10-11 14:59:58.402:WARN::Failed startup of context o.e.j.w.WebAppContext{/server,[file:/home/astral/workz/protection/classloading/server/target/server-0.0.0-SNAPSHOT/, jar:file:/home/astral/workz/protection/classloading/server/target/server-0.0.0-SNAPSHOT/WEB-INF/lib/south-street-1.0.1.jar!/META-INF/resources/, jar:file:/home/astral/workz/protection/classloading/server/target/server-0.0.0-SNAPSHOT/WEB-INF/lib/jsf-impl-2.1.2.jar!/META-INF/resources/, jar:file:/home/astral/workz/protection/classloading/server/target/server-0.0.0-SNAPSHOT/WEB-INF/lib/primefaces-3.0.M3.jar!/META-INF/resources/]},/home/astral/workz/protection/classloading/server/target/server-0.0.0-SNAPSHOT.war
java.lang.IllegalStateException: class org.springframework.web.filter.CharacterEncodingFilter is not a javax.servlet.Filter
        at org.eclipse.jetty.servlet.FilterHolder.doStart(FilterHolder.java:78)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:58)
        at org.eclipse.jetty.servlet.ServletHandler.initialize(ServletHandler.java:742)
        at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:245)
        at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1208)
        at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:586)
        at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:449)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:58)
        at org.eclipse.jetty.deploy.bindings.StandardStarter.processBinding(StandardStarter.java:36)
        at org.eclipse.jetty.deploy.AppLifeCycle.runBindings(AppLifeCycle.java:180)
        at org.eclipse.jetty.deploy.DeploymentManager.requestAppGoal(DeploymentManager.java:482)
        at org.eclipse.jetty.deploy.DeploymentManager.addApp(DeploymentManager.java:135)
        at org.eclipse.jetty.deploy.providers.ScanningAppProvider.fileAdded(ScanningAppProvider.java:137)
        at org.eclipse.jetty.deploy.providers.ScanningAppProvider$1.fileAdded(ScanningAppProvider.java:50)
        at org.eclipse.jetty.util.Scanner.reportAddition(Scanner.java:601)
        at org.eclipse.jetty.util.Scanner.reportDifferences(Scanner.java:531)
        at org.eclipse.jetty.util.Scanner.scan(Scanner.java:394)
        at org.eclipse.jetty.util.Scanner.doStart(Scanner.java:329)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:58)
        at org.eclipse.jetty.deploy.providers.ScanningAppProvider.doStart(ScanningAppProvider.java:114)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:58)
        at org.eclipse.jetty.deploy.DeploymentManager.startAppProvider(DeploymentManager.java:543)
        at org.eclipse.jetty.deploy.DeploymentManager.doStart(DeploymentManager.java:218)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:58)
        at org.eclipse.jetty.util.component.AggregateLifeCycle.doStart(AggregateLifeCycle.java:41)
        at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:50)
        at org.eclipse.jetty.server.handler.HandlerWrapper.doStart(HandlerWrapper.java:90)
        at org.eclipse.jetty.server.Server.doStart(Server.java:258)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:58)
        at org.eclipse.jetty.xml.XmlConfiguration$1.run(XmlConfiguration.java:1197)
        at java.security.AccessController.doPrivileged(Native Method)
        at org.eclipse.jetty.xml.XmlConfiguration.main(XmlConfiguration.java:1120)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:616)
        at org.eclipse.jetty.start.Main.invokeMain(Main.java:469)
        at org.eclipse.jetty.start.Main.start(Main.java:612)
        at org.eclipse.jetty.start.Main.parseCommandLine(Main.java:265)
        at org.eclipse.jetty.start.Main.main(Main.java:79)

WebAppClassloaderEncryption.java

public class WebAppClassLoaderEnc extends WebAppClassLoader {

    public WebAppClassLoaderEnc(ClassLoader parent, Context context) throws IOException {
 	super(parent, context);
    }

    public WebAppClassLoaderEnc(Context context) throws IOException {
	super(context);
    }

    @Override
    public Class<?> loadClass(final String name, final boolean resolve)
            throws ClassNotFoundException {
        Class c = null;
        c = findLoadedClass(name);

        if (c == null) {
            Class parentsVersion = null;
            try {
                parentsVersion = getParent().loadClass(name);

                if (parentsVersion.getClassLoader() != getParent())
                    c = parentsVersion;
            } catch (ClassNotFoundException ignore) {
            } catch (ClassFormatError ignore) {
            }
			if (c == null) {
                try {
                    c = this.findClass(name);
                } catch (ClassNotFoundException ignore) {
                    c = parentsVersion;
                }
            }
            
        }

        if (c == null)
            throw new ClassNotFoundException(name);
        if (resolve)
            resolveClass(c);
        return c;
    }

    @Override
    public Class<?> loadClass(String name) throws ClassNotFoundException {
		return this.loadClass(name, false);
    }
	
    @Override
    protected Class<?> findClass(final String name) throws ClassNotFoundException {

        String classResource = name.replace('.', '/') + ".classx";
        URL classURL = getResource(classResource);

        if (classURL == null) {
			classResource = name.replace('.', '/') + ".class";
			classURL = getResource(classResource);
		}

		try {
			InputStream in = null;
			in = classURL.openStream();

			final byte[] classBytes = readFully(in);

			System.out.println(classBytes);
			// "decrypt":
			if (classResource.endsWith("x"))
				crypt(classBytes);
			Class result = this.defineClass(name, classBytes, 0, classBytes.length);
			return result;
		} catch (IOException ex) {
			Logger.getLogger(WebAppClassLoaderEnc.class.getName()).log(Level.SEVERE, null, ex);
		}
		return null;
    }
	
    private static void crypt(final byte[] data) {
        for (int i = 16; i < data.length; ++i)
            data[i] ^= 0x5A;
    }

    private static byte[] readFully(final InputStream in) throws IOException {
        final ByteArrayOutputStream buf1 = new ByteArrayOutputStream();
        final byte[] buf2 = new byte[8 * 1024];

        for (int read; (read = in.read(buf2)) > 0;) {
            buf1.write(buf2, 0, read);
        }
        return buf1.toByteArray();
    }
	
}