示例#1
0
 /**
  * This kludge is specific to get over AccessControlException thrown during Applet.stop() or
  * destroy() when static thread is suspended. Set a flag in AppletClassLoader to indicate that an
  * AccessControlException for RuntimePermission "modifyThread" or "modifyThreadGroup" had
  * occurred.
  */
 private void setExceptionStatus(AccessControlException e) {
   Permission p = e.getPermission();
   if (p instanceof RuntimePermission) {
     if (p.getName().startsWith("modifyThread")) {
       if (loader == null) loader = getClassLoader(getCodeBase(), getClassLoaderCacheKey());
       loader.setExceptionStatus();
     }
   }
 }
示例#2
0
  /**
   * get the context for the AppletClassLoader we are creating. the context is granted permission to
   * create the class loader, connnect to the codebase, and whatever else the policy grants to all
   * codebases.
   */
  private AccessControlContext getAccessControlContext(final URL codebase) {

    PermissionCollection perms =
        AccessController.doPrivileged(
            new PrivilegedAction<PermissionCollection>() {
              @Override
              public PermissionCollection run() {
                Policy p = java.security.Policy.getPolicy();
                if (p != null) {
                  return p.getPermissions(
                      new CodeSource(null, (java.security.cert.Certificate[]) null));
                } else {
                  return null;
                }
              }
            });

    if (perms == null) perms = new Permissions();

    // XXX: this is needed to be able to create the classloader itself!

    perms.add(SecurityConstants.CREATE_CLASSLOADER_PERMISSION);

    Permission p;
    java.net.URLConnection urlConnection = null;
    try {
      urlConnection = codebase.openConnection();
      p = urlConnection.getPermission();
    } catch (java.io.IOException ioe) {
      p = null;
    }

    if (p != null) perms.add(p);

    if (p instanceof FilePermission) {

      String path = p.getName();

      int endIndex = path.lastIndexOf(File.separatorChar);

      if (endIndex != -1) {
        path = path.substring(0, endIndex + 1);

        if (path.endsWith(File.separator)) {
          path += "-";
        }
        perms.add(new FilePermission(path, SecurityConstants.FILE_READ_ACTION));
      }
    } else {
      URL locUrl = codebase;
      if (urlConnection instanceof JarURLConnection) {
        locUrl = ((JarURLConnection) urlConnection).getJarFileURL();
      }
      String host = locUrl.getHost();
      if (host != null && (host.length() > 0))
        perms.add(new SocketPermission(host, SecurityConstants.SOCKET_CONNECT_ACCEPT_ACTION));
    }

    ProtectionDomain domain =
        new ProtectionDomain(
            new CodeSource(codebase, (java.security.cert.Certificate[]) null), perms);
    AccessControlContext acc = new AccessControlContext(new ProtectionDomain[] {domain});

    return acc;
  }