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Java Socket实战之五 使用加密协议传输对象

2013-04-03 14:48 323 查看
前面几篇博文提到了Socket中一些常用的用法，但是对于一些有安全要求的应用就需要加密传输的数据，此时就需要用到SSLSocket了。

还是一样需要一个实现了java.io.Serializable接口的简单Java对象

[java]
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package com.googlecode.garbagecan.test.socket.ssl; 

 
public class User
implements java.io.Serializable { 

    private static
final long serialVersionUID = 1L; 

    private String name; 

    private String password; 

 
    public User() { 
         
    } 
     
    public User(String name, String password) { 

        this.name = name; 

        this.password = password; 

    } 
     
    public String getName() { 

        return name; 
    } 
 
    public void setName(String name) { 

        this.name = name; 
    } 
 
    public String getPassword() { 

        return password; 
    } 
 
    public void setPassword(String password) { 

        this.password = password; 

    } 
     
} 

package com.googlecode.garbagecan.test.socket.ssl;

public class User implements java.io.Serializable {
private static final long serialVersionUID = 1L;
private String name;
private String password;

public User() {

}

public User(String name, String password) {
this.name = name;
this.password = password;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public String getPassword() {
return password;
}

public void setPassword(String password) {
this.password = password;
}

}
SSL Server类，这里需要用到ServerSocketFactory类来创建SSLServerSocket类实例，然后在通过SSLServerSocket来获取SSLSocket实例，这里考虑到面向对象中的面向接口编程的理念，所以代码中并没有出现SSLServerSocket和SSLSocket，而是用了他们的父类ServerSocket和Socket。在获取到ServerSocket和Socket实例以后，剩下的代码就和不使用加密方式一样了。

[java]
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package com.googlecode.garbagecan.test.socket.ssl; 

 
import java.io.BufferedInputStream; 

import java.io.IOException; 

import java.io.ObjectInputStream; 

import java.io.ObjectOutputStream; 

import java.net.ServerSocket; 

import java.net.Socket; 
import java.util.logging.Level; 

import java.util.logging.Logger; 

 
import javax.net.ServerSocketFactory; 

import javax.net.ssl.SSLServerSocketFactory; 

 
public class MyServer { 

     
    private final
static Logger logger = Logger.getLogger(MyServer.class.getName()); 

     
    public static
void main(String[] args) { 
        try { 
            ServerSocketFactory factory = SSLServerSocketFactory.getDefault(); 

            ServerSocket server = factory.createServerSocket(10000); 

             
            while (true) { 

                Socket socket = server.accept(); 
                invoke(socket); 
            } 
        } catch (Exception ex) { 

            ex.printStackTrace(); 
        } 
    } 
     
    private static
void invoke(final Socket socket)
throws IOException { 
        new Thread(new Runnable() { 

            public
void run() { 
                ObjectInputStream is = null; 

                ObjectOutputStream os =
null; 
                try { 
                    is = new ObjectInputStream(new BufferedInputStream(socket.getInputStream())); 

                    os = new ObjectOutputStream(socket.getOutputStream()); 

 
                    Object obj = is.readObject(); 
                    User user = (User)obj; 
                    System.out.println("user: " + user.getName() +
"/" + user.getPassword()); 
 
                    user.setName(user.getName() +
"_new"); 
                    user.setPassword(user.getPassword() +
"_new"); 
 
                    os.writeObject(user); 
                    os.flush(); 
                } catch (IOException ex) { 

                    logger.log(Level.SEVERE, null, ex); 

                } catch(ClassNotFoundException ex) { 

                    logger.log(Level.SEVERE, null, ex); 

                } finally { 

                    try { 
                        is.close(); 
                    } catch(Exception ex) {} 

                    try { 

                        os.close(); 
                    } catch(Exception ex) {} 

                    try { 
                        socket.close(); 
                    } catch(Exception ex) {} 

                } 
            } 
        }).start(); 
    } 
} 

package com.googlecode.garbagecan.test.socket.ssl;

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.net.ServerSocketFactory;
import javax.net.ssl.SSLServerSocketFactory;

public class MyServer {

private final static Logger logger = Logger.getLogger(MyServer.class.getName());

public static void main(String[] args) {
try {
ServerSocketFactory factory = SSLServerSocketFactory.getDefault();
ServerSocket server = factory.createServerSocket(10000);

while (true) {
Socket socket = server.accept();
invoke(socket);
}
} catch (Exception ex) {
ex.printStackTrace();
}
}

private static void invoke(final Socket socket) throws IOException {
new Thread(new Runnable() {
public void run() {
ObjectInputStream is = null;
ObjectOutputStream os = null;
try {
is = new ObjectInputStream(new BufferedInputStream(socket.getInputStream()));
os = new ObjectOutputStream(socket.getOutputStream());

Object obj = is.readObject();
User user = (User)obj;
System.out.println("user: " + user.getName() + "/" + user.getPassword());

user.setName(user.getName() + "_new");
user.setPassword(user.getPassword() + "_new");

os.writeObject(user);
os.flush();
} catch (IOException ex) {
logger.log(Level.SEVERE, null, ex);
} catch(ClassNotFoundException ex) {
logger.log(Level.SEVERE, null, ex);
} finally {
try {
is.close();
} catch(Exception ex) {}
try {
os.close();
} catch(Exception ex) {}
try {
socket.close();
} catch(Exception ex) {}
}
}
}).start();
}
}
SSL Client类和SSL Server类类似，只是将其中获取Socket的方式有所变化，其余的代码也和不使用加密方式一样。

[java]
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package com.googlecode.garbagecan.test.socket.ssl; 

 
import java.io.BufferedInputStream; 

import java.io.IOException; 

import java.io.ObjectInputStream; 

import java.io.ObjectOutputStream; 

import java.net.Socket; 

import java.util.logging.Level; 

import java.util.logging.Logger; 

 
import javax.net.SocketFactory; 

import javax.net.ssl.SSLSocketFactory; 

 
public class MyClient { 

     
private final
static Logger logger = Logger.getLogger(MyClient.class.getName()); 

 
    public static
void main(String[] args) throws Exception { 

        for (int i =
0; i < 100; i++) { 

            Socket socket = null; 

            ObjectOutputStream os = null; 

            ObjectInputStream is = null; 

             
            try { 
                SocketFactory factory = SSLSocketFactory.getDefault(); 

                socket = factory.createSocket("localhost",
10000); 
     
                os = new ObjectOutputStream(socket.getOutputStream()); 

                User user = new User("user_" + i,
"password_" + i); 
                os.writeObject(user); 
                os.flush(); 
                 
                is = new ObjectInputStream(new BufferedInputStream(socket.getInputStream())); 

                Object obj = is.readObject(); 
                if (obj !=
null) { 
                    user = (User)obj; 
                    System.out.println("user: " + user.getName() +
"/" + user.getPassword()); 
                } 
            } catch(IOException ex) { 

                logger.log(Level.SEVERE, null, ex); 

            } finally { 

                try { 
                    is.close(); 
                } catch(Exception ex) {} 

                try { 

                    os.close(); 
                } catch(Exception ex) {} 

                try { 
                    socket.close(); 
                } catch(Exception ex) {} 

            } 
        } 
    } 
} 

package com.googlecode.garbagecan.test.socket.ssl;

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.net.Socket;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.net.SocketFactory;
import javax.net.ssl.SSLSocketFactory;

public class MyClient {

private final static Logger logger = Logger.getLogger(MyClient.class.getName());

public static void main(String[] args) throws Exception {
for (int i = 0; i < 100; i++) {
Socket socket = null;
ObjectOutputStream os = null;
ObjectInputStream is = null;

try {
SocketFactory factory = SSLSocketFactory.getDefault();
socket = factory.createSocket("localhost", 10000);

os = new ObjectOutputStream(socket.getOutputStream());
User user = new User("user_" + i, "password_" + i);
os.writeObject(user);
os.flush();

is = new ObjectInputStream(new BufferedInputStream(socket.getInputStream()));
Object obj = is.readObject();
if (obj != null) {
user = (User)obj;
System.out.println("user: " + user.getName() + "/" + user.getPassword());
}
} catch(IOException ex) {
logger.log(Level.SEVERE, null, ex);
} finally {
try {
is.close();
} catch(Exception ex) {}
try {
os.close();
} catch(Exception ex) {}
try {
socket.close();
} catch(Exception ex) {}
}
}
}
}
代码写完了，下面就需要产生keystore文件了，运行下面的命令

[plain]
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keytool -genkey -alias mysocket -keyalg RSA -keystore mysocket.jks 

keytool -genkey -alias mysocket -keyalg RSA -keystore mysocket.jks
在提示输入项中，密码项自己给定，其它都不改直接回车，这里我使用的密码是“mysocket”。

运行Server

[plain]
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java -Djavax.net.ssl.keyStore=mysocket.jks -Djavax.net.ssl.keyStorePassword=mysocket com.googlecode.garbagecan.test.socket.ssl.MyServer 

java -Djavax.net.ssl.keyStore=mysocket.jks -Djavax.net.ssl.keyStorePassword=mysocket com.googlecode.garbagecan.test.socket.ssl.MyServer
运行Client

[plain]
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java -Djavax.net.ssl.trustStore=mysocket.jks  -Djavax.net.ssl.trustStorePassword=mysocket com.googlecode.garbagecan.test.socket.ssl.MyClient 

java -Djavax.net.ssl.trustStore=mysocket.jks  -Djavax.net.ssl.trustStorePassword=mysocket com.googlecode.garbagecan.test.socket.ssl.MyClient
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