/**
* 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();
}
}
}
/**
* 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;
}