java.util.logging.LoggingPermission#java.io.FilePermission源码实例Demo

/**
 * Create permission for groovy scripts of the {@link ScriptingOperator}.
 *
 * @return the permissions, never {@code null}
 */
private static PermissionCollection createGroovySourcePermissions() {
	if (ProductConstraintManager.INSTANCE.isInitialized()) {
		if (ProductConstraintManager.INSTANCE.getActiveLicense()
				.getPrecedence() >= StudioLicenseConstants.UNLIMITED_LICENSE_PRECEDENCE
				|| ProductConstraintManager.INSTANCE.isTrialLicense()) {
			return createAllPermissions();
		}
	}

	Permissions permissions = new Permissions();

	// grant some permissions because the script is something the user himself created
	permissions.add(new PropertyPermission("*", "read, write"));
	permissions.add(new FilePermission("<<ALL FILES>>", "read, write, delete"));

	addCommonPermissions(permissions);

	return permissions;
}
 

public SimplePolicy(TestCase test, ThreadLocal<AtomicBoolean> allowAll) {
    this.allowAll = allowAll;

    // Permission needed by the tested code exercised in the test
    permissions = new Permissions();
    permissions.add(new RuntimePermission("fileSystemProvider"));
    permissions.add(new RuntimePermission("createClassLoader"));
    permissions.add(new RuntimePermission("closeClassLoader"));
    permissions.add(new RuntimePermission("getClassLoader"));
    permissions.add(new RuntimePermission("accessDeclaredMembers"));
    permissions.add(new ReflectPermission("suppressAccessChecks"));
    permissions.add(new PropertyPermission("*", "read"));
    permissions.add(new FilePermission("<<ALL FILES>>", "read"));

    // these are used for configuring the test itself...
    allPermissions = new Permissions();
    allPermissions.add(new java.security.AllPermission());
}
 

/**
 *
 */
private PermissionCollection makeImplicitPermissionCollection(FrameworkContext fw, Bundle b) {
  // NYI, perhaps we should optimize this collection.
  final Permissions pc = new Permissions();
  if (dataRoot != null) {
    pc.add(new FilePermission(dataRoot.getPath(), "read,write"));
    pc.add(new FilePermission((new File(dataRoot, "-")).getPath(),
                              "read,write,delete"));
  }
  final StringBuffer sb = new StringBuffer("(id=");
  sb.append(b.getBundleId());
  sb.append(")");
  pc.add(new AdminPermission(sb.toString(),
                             AdminPermission.RESOURCE + "," +
                             AdminPermission.METADATA + "," +
                             AdminPermission.CLASS));
  pc.add(new PropertyPermission("org.osgi.framework.*", "read"));
  pc.add(new CapabilityPermission(ExecutionEnvironmentNamespace.EXECUTION_ENVIRONMENT_NAMESPACE,
                                  CapabilityPermission.REQUIRE));
  return pc;
}
 

/**
 * Creates one of the well-known permissions directly instead of
 * via reflection. Keep list short to not penalize non-JDK-defined
 * permissions.
 */
private static final Permission getKnownInstance(Class<?> claz,
    String name, String actions) {
    if (claz.equals(FilePermission.class)) {
        return new FilePermission(name, actions);
    } else if (claz.equals(SocketPermission.class)) {
        return new SocketPermission(name, actions);
    } else if (claz.equals(RuntimePermission.class)) {
        return new RuntimePermission(name, actions);
    } else if (claz.equals(PropertyPermission.class)) {
        return new PropertyPermission(name, actions);
    } else if (claz.equals(NetPermission.class)) {
        return new NetPermission(name, actions);
    } else if (claz.equals(AllPermission.class)) {
        return SecurityConstants.ALL_PERMISSION;
    } else {
        return null;
    }
}
 

/**
 * Creates one of the well-known permissions directly instead of
 * via reflection. Keep list short to not penalize non-JDK-defined
 * permissions.
 */
private static final Permission getKnownInstance(Class<?> claz,
    String name, String actions) {
    if (claz.equals(FilePermission.class)) {
        return new FilePermission(name, actions);
    } else if (claz.equals(SocketPermission.class)) {
        return new SocketPermission(name, actions);
    } else if (claz.equals(RuntimePermission.class)) {
        return new RuntimePermission(name, actions);
    } else if (claz.equals(PropertyPermission.class)) {
        return new PropertyPermission(name, actions);
    } else if (claz.equals(NetPermission.class)) {
        return new NetPermission(name, actions);
    } else if (claz.equals(AllPermission.class)) {
        return SecurityConstants.ALL_PERMISSION;
    } else {
        return null;
    }
}
 

public SimplePolicy(TestCase test, AtomicBoolean allowAll) {
    this.allowAll = allowAll;
    permissions = new Permissions();
    permissions.add(new LoggingPermission("control", null)); // needed by new FileHandler()
    permissions.add(new FilePermission("<<ALL FILES>>", "read")); // needed by new FileHandler()
    permissions.add(new FilePermission(logFile, "write,delete")); // needed by new FileHandler()
    permissions.add(new FilePermission(logFile+".lck", "write,delete")); // needed by FileHandler.close()
    permissions.add(new FilePermission(logFile+".1", "write,delete")); // needed by new FileHandler()
    permissions.add(new FilePermission(logFile+".1.lck", "write,delete")); // needed by FileHandler.close()
    permissions.add(new FilePermission(tmpLogFile, "write,delete")); // needed by new FileHandler()
    permissions.add(new FilePermission(tmpLogFile+".lck", "write,delete")); // needed by FileHandler.close()
    permissions.add(new FilePermission(tmpLogFile+".1", "write,delete")); // needed by new FileHandler()
    permissions.add(new FilePermission(tmpLogFile+".1.lck", "write,delete")); // needed by FileHandler.close()
    permissions.add(new FilePermission(userDir, "write")); // needed by new FileHandler()
    permissions.add(new FilePermission(tmpDir, "write")); // needed by new FileHandler()
    permissions.add(new PropertyPermission("user.dir", "read"));
    permissions.add(new PropertyPermission("java.io.tmpdir", "read"));
    allPermissions = new Permissions();
    allPermissions.add(new java.security.AllPermission());
}
 

@Override
public Path readSymbolicLink(Path obj1) throws IOException {
    UnixPath link = UnixPath.toUnixPath(obj1);
    // permission check
    SecurityManager sm = System.getSecurityManager();
    if (sm != null) {
        FilePermission perm = new FilePermission(link.getPathForPermissionCheck(),
            SecurityConstants.FILE_READLINK_ACTION);
        sm.checkPermission(perm);
    }
    try {
        byte[] target = readlink(link);
        return new UnixPath(link.getFileSystem(), target);
    } catch (UnixException x) {
       if (x.errno() == UnixConstants.EINVAL)
            throw new NotLinkException(link.getPathForExceptionMessage());
        x.rethrowAsIOException(link);
        return null;    // keep compiler happy
    }
}
 

public static ProxyClassesDumper getInstance(String path) {
    if (null == path) {
        return null;
    }
    try {
        path = path.trim();
        final Path dir = Path.of(path.isEmpty() ? "." : path);
        AccessController.doPrivileged(new PrivilegedAction<>() {
                @Override
                public Void run() {
                    validateDumpDir(dir);
                    return null;
                }
            }, null, new FilePermission("<<ALL FILES>>", "read, write"));
        return new ProxyClassesDumper(dir);
    } catch (InvalidPathException ex) {
        PlatformLogger.getLogger(ProxyClassesDumper.class.getName())
                      .warning("Path " + path + " is not valid - dumping disabled", ex);
    } catch (IllegalArgumentException iae) {
        PlatformLogger.getLogger(ProxyClassesDumper.class.getName())
                      .warning(iae.getMessage() + " - dumping disabled");
    }
    return null;
}
 

public SimplePolicy(TestCase test, AtomicBoolean allowAll) {
    this.allowAll = allowAll;
    permissions = new Permissions();
    permissions.add(new LoggingPermission("control", null)); // needed by new FileHandler()
    permissions.add(new FilePermission("<<ALL FILES>>", "read")); // needed by new FileHandler()
    permissions.add(new FilePermission(logFile, "write,delete")); // needed by new FileHandler()
    permissions.add(new FilePermission(logFile+".lck", "write,delete")); // needed by FileHandler.close()
    permissions.add(new FilePermission(logFile+".1", "write,delete")); // needed by new FileHandler()
    permissions.add(new FilePermission(logFile+".1.lck", "write,delete")); // needed by FileHandler.close()
    permissions.add(new FilePermission(tmpLogFile, "write,delete")); // needed by new FileHandler()
    permissions.add(new FilePermission(tmpLogFile+".lck", "write,delete")); // needed by FileHandler.close()
    permissions.add(new FilePermission(tmpLogFile+".1", "write,delete")); // needed by new FileHandler()
    permissions.add(new FilePermission(tmpLogFile+".1.lck", "write,delete")); // needed by FileHandler.close()
    permissions.add(new FilePermission(userDir, "write")); // needed by new FileHandler()
    permissions.add(new FilePermission(tmpDir, "write")); // needed by new FileHandler()
    permissions.add(new PropertyPermission("user.dir", "read"));
    permissions.add(new PropertyPermission("java.io.tmpdir", "read"));
    allPermissions = new Permissions();
    allPermissions.add(new java.security.AllPermission());
}
 

@Override
public Path readSymbolicLink(Path obj1) throws IOException {
    UnixPath link = UnixPath.toUnixPath(obj1);
    // permission check
    SecurityManager sm = System.getSecurityManager();
    if (sm != null) {
        FilePermission perm = new FilePermission(link.getPathForPermissionCheck(),
            SecurityConstants.FILE_READLINK_ACTION);
        sm.checkPermission(perm);
    }
    try {
        byte[] target = readlink(link);
        return new UnixPath(link.getFileSystem(), target);
    } catch (UnixException x) {
       if (x.errno() == UnixConstants.EINVAL)
            throw new NotLinkException(link.getPathForExceptionMessage());
        x.rethrowAsIOException(link);
        return null;    // keep compiler happy
    }
}
 

@Override
public Path readSymbolicLink(Path obj1) throws IOException {
    UnixPath link = UnixPath.toUnixPath(obj1);
    // permission check
    SecurityManager sm = System.getSecurityManager();
    if (sm != null) {
        FilePermission perm = new FilePermission(link.getPathForPermissionCheck(),
            SecurityConstants.FILE_READLINK_ACTION);
        sm.checkPermission(perm);
    }
    try {
        byte[] target = readlink(link);
        return new UnixPath(link.getFileSystem(), target);
    } catch (UnixException x) {
       if (x.errno() == UnixConstants.EINVAL)
            throw new NotLinkException(link.getPathForExceptionMessage());
        x.rethrowAsIOException(link);
        return null;    // keep compiler happy
    }
}
 

public SimplePolicy(TestCase test, ThreadLocal<AtomicBoolean> allowAll) {
    this.allowAll = allowAll;

    // Permission needed by the tested code exercised in the test
    permissions = new Permissions();
    permissions.add(new RuntimePermission("fileSystemProvider"));
    permissions.add(new RuntimePermission("createClassLoader"));
    permissions.add(new RuntimePermission("closeClassLoader"));
    permissions.add(new RuntimePermission("getClassLoader"));
    permissions.add(new RuntimePermission("accessDeclaredMembers"));
    permissions.add(new ReflectPermission("suppressAccessChecks"));
    permissions.add(new PropertyPermission("*", "read"));
    permissions.add(new FilePermission("<<ALL FILES>>", "read"));

    // these are used for configuring the test itself...
    allPermissions = new Permissions();
    allPermissions.add(new java.security.AllPermission());
}
 

public SimplePolicy(TestCase test, AtomicBoolean allowAll) {
    this.allowAll = allowAll;
    permissions = new Permissions();
    permissions.add(new LoggingPermission("control", null)); // needed by new FileHandler()
    permissions.add(new FilePermission("<<ALL FILES>>", "read")); // needed by new FileHandler()
    permissions.add(new FilePermission(logFile, "write,delete")); // needed by new FileHandler()
    permissions.add(new FilePermission(logFile+".lck", "write,delete")); // needed by FileHandler.close()
    permissions.add(new FilePermission(logFile+".1", "write,delete")); // needed by new FileHandler()
    permissions.add(new FilePermission(logFile+".1.lck", "write,delete")); // needed by FileHandler.close()
    permissions.add(new FilePermission(tmpLogFile, "write,delete")); // needed by new FileHandler()
    permissions.add(new FilePermission(tmpLogFile+".lck", "write,delete")); // needed by FileHandler.close()
    permissions.add(new FilePermission(tmpLogFile+".1", "write,delete")); // needed by new FileHandler()
    permissions.add(new FilePermission(tmpLogFile+".1.lck", "write,delete")); // needed by FileHandler.close()
    permissions.add(new FilePermission(userDir, "write")); // needed by new FileHandler()
    permissions.add(new FilePermission(tmpDir, "write")); // needed by new FileHandler()
    permissions.add(new PropertyPermission("user.dir", "read"));
    permissions.add(new PropertyPermission("java.io.tmpdir", "read"));
    allPermissions = new Permissions();
    allPermissions.add(new java.security.AllPermission());
}
 

public SimplePolicy(TestCase test, ThreadLocal<AtomicBoolean> allowAll) {
    this.allowAll = allowAll;

    // Permission needed by the tested code exercised in the test
    permissions = new Permissions();
    permissions.add(new RuntimePermission("fileSystemProvider"));
    permissions.add(new RuntimePermission("createClassLoader"));
    permissions.add(new RuntimePermission("closeClassLoader"));
    permissions.add(new RuntimePermission("getClassLoader"));
    permissions.add(new RuntimePermission("accessDeclaredMembers"));
    permissions.add(new ReflectPermission("suppressAccessChecks"));
    permissions.add(new PropertyPermission("*", "read"));
    permissions.add(new FilePermission("<<ALL FILES>>", "read"));

    // these are used for configuring the test itself...
    allPermissions = new Permissions();
    allPermissions.add(new java.security.AllPermission());
}
 

public Permission getPermission() throws IOException {
    // Note this is normally called by URLClassPath with an unconnected
    // URLConnection, so the fo will probably be null anyway.
    if (fo != null) {
        File f = FileUtil.toFile(fo);

        if (f != null) {
            return new FilePermission(f.getAbsolutePath(), "read"); // NOI18N
        }

        try {
            FileSystem fs = fo.getFileSystem();

            if (fs instanceof JarFileSystem) {
                return new FilePermission(((JarFileSystem) fs).getJarFile().getAbsolutePath(), "read"); // NOI18N
            }

            // [PENDING] could do XMLFileSystem too...
        } catch (FileStateInvalidException fsie) {
            // ignore
        }
    }

    // fallback
    return new FilePermission("<<ALL FILES>>", "read"); // NOI18N
}
 

@Override
public Path readSymbolicLink(Path obj1) throws IOException {
    UnixPath link = UnixPath.toUnixPath(obj1);
    // permission check
    SecurityManager sm = System.getSecurityManager();
    if (sm != null) {
        FilePermission perm = new FilePermission(link.getPathForPermissionCheck(),
            SecurityConstants.FILE_READLINK_ACTION);
        sm.checkPermission(perm);
    }
    try {
        byte[] target = readlink(link);
        return new UnixPath(link.getFileSystem(), target);
    } catch (UnixException x) {
       if (x.errno() == UnixConstants.EINVAL)
            throw new NotLinkException(link.getPathForExceptionMessage());
        x.rethrowAsIOException(link);
        return null;    // keep compiler happy
    }
}
 

public SimplePolicy(TestCase test, ThreadLocal<AtomicBoolean> allowAll) {
    this.allowAll = allowAll;

    // Permission needed by the tested code exercised in the test
    permissions = new Permissions();
    permissions.add(new RuntimePermission("fileSystemProvider"));
    permissions.add(new RuntimePermission("createClassLoader"));
    permissions.add(new RuntimePermission("closeClassLoader"));
    permissions.add(new RuntimePermission("getClassLoader"));
    permissions.add(new RuntimePermission("accessDeclaredMembers"));
    permissions.add(new ReflectPermission("suppressAccessChecks"));
    permissions.add(new PropertyPermission("*", "read"));
    permissions.add(new FilePermission("<<ALL FILES>>", "read"));

    // these are used for configuring the test itself...
    allPermissions = new Permissions();
    allPermissions.add(new java.security.AllPermission());
}
 

public SimplePolicy(TestCase test, ThreadLocal<AtomicBoolean> allowAll) {
    this.allowAll = allowAll;

    // Permission needed by the tested code exercised in the test
    permissions = new Permissions();
    permissions.add(new RuntimePermission("fileSystemProvider"));
    permissions.add(new RuntimePermission("createClassLoader"));
    permissions.add(new RuntimePermission("closeClassLoader"));
    permissions.add(new RuntimePermission("getClassLoader"));
    permissions.add(new RuntimePermission("accessDeclaredMembers"));
    permissions.add(new ReflectPermission("suppressAccessChecks"));
    permissions.add(new PropertyPermission("*", "read"));
    permissions.add(new FilePermission("<<ALL FILES>>", "read"));

    // these are used for configuring the test itself...
    allPermissions = new Permissions();
    allPermissions.add(new java.security.AllPermission());
}
 

public SimplePolicy(TestCase test, ThreadLocal<AtomicBoolean> allowAll) {
    this.allowAll = allowAll;

    // Permission needed by the tested code exercised in the test
    permissions = new Permissions();
    permissions.add(new RuntimePermission("fileSystemProvider"));
    permissions.add(new RuntimePermission("createClassLoader"));
    permissions.add(new RuntimePermission("closeClassLoader"));
    permissions.add(new RuntimePermission("getClassLoader"));
    permissions.add(new RuntimePermission("accessDeclaredMembers"));
    permissions.add(new ReflectPermission("suppressAccessChecks"));
    permissions.add(new PropertyPermission("*", "read"));
    permissions.add(new FilePermission("<<ALL FILES>>", "read"));

    // these are used for configuring the test itself...
    allPermissions = new Permissions();
    allPermissions.add(new java.security.AllPermission());
}
 

/**
 * Creates one of the well-known permissions directly instead of
 * via reflection. Keep list short to not penalize non-JDK-defined
 * permissions.
 */
private static final Permission getKnownInstance(Class<?> claz,
    String name, String actions) {
    if (claz.equals(FilePermission.class)) {
        return new FilePermission(name, actions);
    } else if (claz.equals(SocketPermission.class)) {
        return new SocketPermission(name, actions);
    } else if (claz.equals(RuntimePermission.class)) {
        return new RuntimePermission(name, actions);
    } else if (claz.equals(PropertyPermission.class)) {
        return new PropertyPermission(name, actions);
    } else if (claz.equals(NetPermission.class)) {
        return new NetPermission(name, actions);
    } else if (claz.equals(AllPermission.class)) {
        return SecurityConstants.ALL_PERMISSION;
    } else {
        return null;
    }
}
 

/**
 * Creates one of the well-known permissions directly instead of
 * via reflection. Keep list short to not penalize non-JDK-defined
 * permissions.
 */
private static final Permission getKnownInstance(Class<?> claz,
    String name, String actions) {
    if (claz.equals(FilePermission.class)) {
        return new FilePermission(name, actions);
    } else if (claz.equals(SocketPermission.class)) {
        return new SocketPermission(name, actions);
    } else if (claz.equals(RuntimePermission.class)) {
        return new RuntimePermission(name, actions);
    } else if (claz.equals(PropertyPermission.class)) {
        return new PropertyPermission(name, actions);
    } else if (claz.equals(NetPermission.class)) {
        return new NetPermission(name, actions);
    } else if (claz.equals(AllPermission.class)) {
        return SecurityConstants.ALL_PERMISSION;
    } else {
        return null;
    }
}
 

/**
 * Configure associated class loader permissions.
 */
private void setPermissions() {

    if (!Globals.IS_SECURITY_ENABLED)
        return;
    if (context == null)
        return;

    // Tell the class loader the root of the context
    ServletContext servletContext = context.getServletContext();

    // Assigning permissions for the work directory
    File workDir =
        (File) servletContext.getAttribute(ServletContext.TEMPDIR);
    if (workDir != null) {
        try {
            String workDirPath = workDir.getCanonicalPath();
            classLoader.addPermission
                (new FilePermission(workDirPath, "read,write"));
            classLoader.addPermission
                (new FilePermission(workDirPath + File.separator + "-",
                                    "read,write,delete"));
        } catch (IOException e) {
            // Ignore
        }
    }

    for (URL url : context.getResources().getBaseUrls()) {
       classLoader.addPermission(url);
    }
}
 

private void checkExec() throws SecurityException {
    SecurityManager sm = System.getSecurityManager();
    if (sm != null) {
        sm.checkPermission(new FilePermission("<<ALL FILES>>",
                                              SecurityConstants.FILE_EXECUTE_ACTION));
    }
}
 

private void checkExec() throws SecurityException {
    SecurityManager sm = System.getSecurityManager();
    if (sm != null) {
        sm.checkPermission(new FilePermission("<<ALL FILES>>",
                SecurityConstants.FILE_EXECUTE_ACTION));
    }
}
 

private boolean isForbiddenToRead (File file, ProtectionDomain protectionDomain)
{
    if (null == protectionDomain) {
        return false;
    }
    try {
        FilePermission filePermission =
                new FilePermission(file.getCanonicalPath(), "read, delete");
        if (protectionDomain.implies(filePermission)) {
            return false;
        }
    } catch (IOException e) {}

    return true;
}
 

/**
 * Generates an AccessControlContext with minimal permissions.
 * The approach used here is taken from the similar method
 * getAccessControlContext() in the sun.applet.AppletPanel class.
 */
private static AccessControlContext getAccessControlContext(int port) {
    // begin with permissions granted to all code in current policy
    PermissionCollection perms = AccessController.doPrivileged(
        new java.security.PrivilegedAction<PermissionCollection>() {
            public PermissionCollection run() {
                CodeSource codesource = new CodeSource(null,
                    (java.security.cert.Certificate[]) null);
                Policy p = java.security.Policy.getPolicy();
                if (p != null) {
                    return p.getPermissions(codesource);
                } else {
                    return new Permissions();
                }
            }
        });

    /*
     * Anyone can connect to the registry and the registry can connect
     * to and possibly download stubs from anywhere. Downloaded stubs and
     * related classes themselves are more tightly limited by RMI.
     */
    perms.add(new SocketPermission("*", "connect,accept"));
    perms.add(new SocketPermission("localhost:"+port, "listen,accept"));

    perms.add(new RuntimePermission("accessClassInPackage.sun.jvmstat.*"));
    perms.add(new RuntimePermission("accessClassInPackage.sun.jvm.hotspot.*"));

    perms.add(new FilePermission("<<ALL FILES>>", "read"));

    /*
     * Create an AccessControlContext that consists of a single
     * protection domain with only the permissions calculated above.
     */
    ProtectionDomain pd = new ProtectionDomain(
        new CodeSource(null,
            (java.security.cert.Certificate[]) null), perms);
    return new AccessControlContext(new ProtectionDomain[] { pd });
}
 

private void checkRead() throws SecurityException {
    SecurityManager sm = System.getSecurityManager();
    if (sm != null) {
        sm.checkPermission(new FilePermission("<<ALL FILES>>",
                SecurityConstants.FILE_READ_ACTION));
    }
}
 

private boolean isForbiddenToRead (File file, ProtectionDomain protectionDomain)
{
    if (null == protectionDomain) {
        return false;
    }
    try {
        FilePermission filePermission =
                new FilePermission(file.getCanonicalPath(), "read, delete");
        if (protectionDomain.implies(filePermission)) {
            return false;
        }
    } catch (IOException e) {}

    return true;
}
 

public SimplePolicy(TestCase test, AtomicBoolean allowAll) {
    this.allowAll = allowAll;
    permissions = new Permissions();
    permissions.add(new LoggingPermission("control", null));
    permissions.add(new FilePermission(PREFIX+".lck", "read,write,delete"));
    permissions.add(new FilePermission(PREFIX, "read,write"));

    // these are used for configuring the test itself...
    allPermissions = new Permissions();
    allPermissions.add(new java.security.AllPermission());

}
 

/**
 * Generates an AccessControlContext with minimal permissions.
 * The approach used here is taken from the similar method
 * getAccessControlContext() in the sun.applet.AppletPanel class.
 */
private static AccessControlContext getAccessControlContext(int port) {
    // begin with permissions granted to all code in current policy
    PermissionCollection perms = AccessController.doPrivileged(
        new java.security.PrivilegedAction<PermissionCollection>() {
            public PermissionCollection run() {
                CodeSource codesource = new CodeSource(null,
                    (java.security.cert.Certificate[]) null);
                Policy p = java.security.Policy.getPolicy();
                if (p != null) {
                    return p.getPermissions(codesource);
                } else {
                    return new Permissions();
                }
            }
        });

    /*
     * Anyone can connect to the registry and the registry can connect
     * to and possibly download stubs from anywhere. Downloaded stubs and
     * related classes themselves are more tightly limited by RMI.
     */
    perms.add(new SocketPermission("*", "connect,accept"));
    perms.add(new SocketPermission("localhost:"+port, "listen,accept"));

    perms.add(new RuntimePermission("accessClassInPackage.sun.jvmstat.*"));
    perms.add(new RuntimePermission("accessClassInPackage.sun.jvm.hotspot.*"));

    perms.add(new FilePermission("<<ALL FILES>>", "read"));

    /*
     * Create an AccessControlContext that consists of a single
     * protection domain with only the permissions calculated above.
     */
    ProtectionDomain pd = new ProtectionDomain(
        new CodeSource(null,
            (java.security.cert.Certificate[]) null), perms);
    return new AccessControlContext(new ProtectionDomain[] { pd });
}