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* 1.1 (the "License"); you may not use this file except in compliance with
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*
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* for the specific language governing rights and limitations under the
* License.
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* The Original Code is Rhino code, released May 6, 1999.
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* The Initial Developer of the Original Code is
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package net.sourceforge.htmlunit.corejs.javascript;
import java.lang.ref.SoftReference;
import java.lang.reflect.UndeclaredThrowableException;
import java.security.AccessController;
import java.security.CodeSource;
import java.security.Policy;
import java.security.PrivilegedAction;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import java.security.SecureClassLoader;
import java.util.Map;
import java.util.WeakHashMap;
import net.sourceforge.htmlunit.corejs.classfile.ByteCode;
import net.sourceforge.htmlunit.corejs.classfile.ClassFileWriter;
/**
* A security controller relying on Java {@link Policy} in effect. When you use
* this security controller, your securityDomain objects must be instances of
* {@link CodeSource} representing the location from where you load your
* scripts. Any Java policy "grant" statements matching the URL and certificate
* in code sources will apply to the scripts. If you specify any certificates
* within your {@link CodeSource} objects, it is your responsibility to verify
* (or not) that the script source files are signed in whatever
* implementation-specific way you're using.
* @author Attila Szegedi
*/
public class PolicySecurityController extends SecurityController
{
private static final byte[] secureCallerImplBytecode = loadBytecode();
// We're storing a CodeSource -> (ClassLoader -> SecureRenderer), since we
// need to have one renderer per class loader. We're using weak hash maps
// and soft references all the way, since we don't want to interfere with
// cleanup of either CodeSource or ClassLoader objects.
private static final Map<CodeSource,Map<ClassLoader,SoftReference<SecureCaller>>>
callers =
new WeakHashMap<CodeSource,Map<ClassLoader,SoftReference<SecureCaller>>>();
@Override
public Class<?> getStaticSecurityDomainClassInternal() {
return CodeSource.class;
}
private static class Loader extends SecureClassLoader
implements GeneratedClassLoader
{
private final CodeSource codeSource;
Loader(ClassLoader parent, CodeSource codeSource)
{
super(parent);
this.codeSource = codeSource;
}
public Class<?> defineClass(String name, byte[] data)
{
return defineClass(name, data, 0, data.length, codeSource);
}
public void linkClass(Class<?> cl)
{
resolveClass(cl);
}
}
@Override
public GeneratedClassLoader createClassLoader(final ClassLoader parent,
final Object securityDomain)
{
return (Loader)AccessController.doPrivileged(
new PrivilegedAction<Object>()
{
public Object run()
{
return new Loader(parent, (CodeSource)securityDomain);
}
});
}
@Override
public Object getDynamicSecurityDomain(Object securityDomain)
{
// No separate notion of dynamic security domain - just return what was
// passed in.
return securityDomain;
}
@Override
public Object callWithDomain(final Object securityDomain, final Context cx,
Callable callable, Scriptable scope, Scriptable thisObj,
Object[] args)
{
// Run in doPrivileged as we might be checked for "getClassLoader"
// runtime permission
final ClassLoader classLoader = (ClassLoader)AccessController.doPrivileged(
new PrivilegedAction<Object>() {
public Object run() {
return cx.getApplicationClassLoader();
}
});
final CodeSource codeSource = (CodeSource)securityDomain;
Map<ClassLoader,SoftReference<SecureCaller>> classLoaderMap;
synchronized (callers) {
classLoaderMap = callers.get(codeSource);
if(classLoaderMap == null) {
classLoaderMap = new WeakHashMap<ClassLoader,SoftReference<SecureCaller>>();
callers.put(codeSource, classLoaderMap);
}
}
SecureCaller caller;
synchronized (classLoaderMap) {
SoftReference<SecureCaller> ref = classLoaderMap.get(classLoader);
if (ref != null) {
caller = ref.get();
} else {
caller = null;
}
if (caller == null)
{
try
{
// Run in doPrivileged as we'll be checked for
// "createClassLoader" runtime permission
caller = (SecureCaller)AccessController.doPrivileged(
new PrivilegedExceptionAction<Object>()
{
public Object run() throws Exception
{
Loader loader = new Loader(classLoader,
codeSource);
Class<?> c = loader.defineClass(
SecureCaller.class.getName() + "Impl",
secureCallerImplBytecode);
return c.newInstance();
}
});
classLoaderMap.put(classLoader, new SoftReference<SecureCaller>(caller));
}
catch(PrivilegedActionException ex)
{
throw new UndeclaredThrowableException(ex.getCause());
}
}
}
return caller.call(callable, cx, scope, thisObj, args);
}
public abstract static class SecureCaller
{
public abstract Object call(Callable callable, Context cx, Scriptable scope,
Scriptable thisObj, Object[] args);
}
private static byte[] loadBytecode()
{
String secureCallerClassName = SecureCaller.class.getName();
ClassFileWriter cfw = new ClassFileWriter(
secureCallerClassName + "Impl", secureCallerClassName,
"<generated>");
cfw.startMethod("<init>", "()V", ClassFileWriter.ACC_PUBLIC);
cfw.addALoad(0);
cfw.addInvoke(ByteCode.INVOKESPECIAL, secureCallerClassName,
"<init>", "()V");
cfw.add(ByteCode.RETURN);
cfw.stopMethod((short)1);
String callableCallSig =
"Lnet/sourceforge/htmlunit/corejs/javascript/Context;" +
"Lnet/sourceforge/htmlunit/corejs/javascript/Scriptable;" +
"Lnet/sourceforge/htmlunit/corejs/javascript/Scriptable;" +
"[Ljava/lang/Object;)Ljava/lang/Object;";
cfw.startMethod("call",
"(Lnet/sourceforge/htmlunit/corejs/javascript/Callable;" + callableCallSig,
(short)(ClassFileWriter.ACC_PUBLIC
| ClassFileWriter.ACC_FINAL));
for(int i = 1; i < 6; ++i) {
cfw.addALoad(i);
}
cfw.addInvoke(ByteCode.INVOKEINTERFACE,
"net/sourceforge/htmlunit/corejs/javascript/Callable", "call",
"(" + callableCallSig);
cfw.add(ByteCode.ARETURN);
cfw.stopMethod((short)6);
return cfw.toByteArray();
}
}