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The ActiveMQ Client implementation
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.activemq.util;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectStreamClass;
import java.lang.reflect.Proxy;
import java.util.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class ClassLoadingAwareObjectInputStream extends ObjectInputStream {
private static final Logger LOG = LoggerFactory.getLogger(ClassLoadingAwareObjectInputStream.class);
private static final ClassLoader FALLBACK_CLASS_LOADER =
ClassLoadingAwareObjectInputStream.class.getClassLoader();
public static final String[] serializablePackages;
private List trustedPackages = new ArrayList();
private boolean trustAllPackages = false;
private final ClassLoader inLoader;
static {
serializablePackages = System.getProperty("org.apache.activemq.SERIALIZABLE_PACKAGES","java.lang,org.apache.activemq,org.fusesource.hawtbuf,com.thoughtworks.xstream.mapper").split(",");
}
public ClassLoadingAwareObjectInputStream(InputStream in) throws IOException {
super(in);
inLoader = in.getClass().getClassLoader();
trustedPackages.addAll(Arrays.asList(serializablePackages));
}
@Override
protected Class resolveClass(ObjectStreamClass classDesc) throws IOException, ClassNotFoundException {
ClassLoader cl = Thread.currentThread().getContextClassLoader();
Class clazz = load(classDesc.getName(), cl, inLoader);
checkSecurity(clazz);
return clazz;
}
@Override
protected Class resolveProxyClass(String[] interfaces) throws IOException, ClassNotFoundException {
ClassLoader cl = Thread.currentThread().getContextClassLoader();
Class[] cinterfaces = new Class[interfaces.length];
for (int i = 0; i < interfaces.length; i++) {
cinterfaces[i] = load(interfaces[i], cl);
}
Class clazz = null;
try {
clazz = Proxy.getProxyClass(cl, cinterfaces);
} catch (IllegalArgumentException e) {
try {
clazz = Proxy.getProxyClass(inLoader, cinterfaces);
} catch (IllegalArgumentException e1) {
// ignore
}
try {
clazz = Proxy.getProxyClass(FALLBACK_CLASS_LOADER, cinterfaces);
} catch (IllegalArgumentException e2) {
// ignore
}
}
if (clazz != null) {
checkSecurity(clazz);
return clazz;
} else {
throw new ClassNotFoundException(null);
}
}
public static boolean isAllAllowed() {
return serializablePackages.length == 1 && serializablePackages[0].equals("*");
}
private boolean trustAllPackages() {
return trustAllPackages || (trustedPackages.size() == 1 && trustedPackages.get(0).equals("*"));
}
private void checkSecurity(Class clazz) throws ClassNotFoundException {
if (trustAllPackages() || clazz.isPrimitive()) {
return;
}
boolean found = false;
Package thePackage = clazz.getPackage();
if (thePackage != null) {
for (String trustedPackage : getTrustedPackages()) {
if (thePackage.getName().equals(trustedPackage) || thePackage.getName().startsWith(trustedPackage + ".")) {
found = true;
break;
}
}
if (!found) {
throw new ClassNotFoundException("Forbidden " + clazz + "! This class is not trusted to be serialized as ObjectMessage payload. Please take a look at http://activemq.apache.org/objectmessage.html for more information on how to configure trusted classes.");
}
}
}
private Class load(String className, ClassLoader... cl) throws ClassNotFoundException {
// check for simple types first
final Class clazz = loadSimpleType(className);
if (clazz != null) {
LOG.trace("Loaded class: {} as simple type -> {}", className, clazz);
return clazz;
}
// try the different class loaders
for (ClassLoader loader : cl) {
LOG.trace("Attempting to load class: {} using classloader: {}", className, cl);
try {
Class answer = Class.forName(className, false, loader);
if (LOG.isTraceEnabled()) {
LOG.trace("Loaded class: {} using classloader: {} -> {}", className, cl, answer);
}
return answer;
} catch (ClassNotFoundException e) {
LOG.trace("Class not found: {} using classloader: {}", className, cl);
// ignore
}
}
// and then the fallback class loader
return Class.forName(className, false, FALLBACK_CLASS_LOADER);
}
/**
* Load a simple type
*
* @param name the name of the class to load
* @return the class or null if it could not be loaded
*/
public static Class loadSimpleType(String name) {
// code from ObjectHelper.loadSimpleType in Apache Camel
// special for byte[] or Object[] as its common to use
if ("java.lang.byte[]".equals(name) || "byte[]".equals(name)) {
return byte[].class;
} else if ("java.lang.Byte[]".equals(name) || "Byte[]".equals(name)) {
return Byte[].class;
} else if ("java.lang.Object[]".equals(name) || "Object[]".equals(name)) {
return Object[].class;
} else if ("java.lang.String[]".equals(name) || "String[]".equals(name)) {
return String[].class;
// and these is common as well
} else if ("java.lang.String".equals(name) || "String".equals(name)) {
return String.class;
} else if ("java.lang.Boolean".equals(name) || "Boolean".equals(name)) {
return Boolean.class;
} else if ("boolean".equals(name)) {
return boolean.class;
} else if ("java.lang.Integer".equals(name) || "Integer".equals(name)) {
return Integer.class;
} else if ("int".equals(name)) {
return int.class;
} else if ("java.lang.Long".equals(name) || "Long".equals(name)) {
return Long.class;
} else if ("long".equals(name)) {
return long.class;
} else if ("java.lang.Short".equals(name) || "Short".equals(name)) {
return Short.class;
} else if ("short".equals(name)) {
return short.class;
} else if ("java.lang.Byte".equals(name) || "Byte".equals(name)) {
return Byte.class;
} else if ("byte".equals(name)) {
return byte.class;
} else if ("java.lang.Float".equals(name) || "Float".equals(name)) {
return Float.class;
} else if ("float".equals(name)) {
return float.class;
} else if ("java.lang.Double".equals(name) || "Double".equals(name)) {
return Double.class;
} else if ("double".equals(name)) {
return double.class;
} else if ("void".equals(name)) {
return void.class;
}
return null;
}
public List getTrustedPackages() {
return trustedPackages;
}
public void setTrustedPackages(List trustedPackages) {
this.trustedPackages = trustedPackages;
}
public void addTrustedPackage(String trustedPackage) {
this.trustedPackages.add(trustedPackage);
}
public boolean isTrustAllPackages() {
return trustAllPackages;
}
public void setTrustAllPackages(boolean trustAllPackages) {
this.trustAllPackages = trustAllPackages;
}
}