java - ssl套接字多线程服务器异常

Question

我想为多线程服务器创建一个 ssl 套接字，但是当连接第二个客户端时，我遇到了一些异常。

这是我的服务器代码:

public class Master implements Runnable{

    public static SSLSocket sslSocket = null;
    public static SSLServerSocket sslServerSocket =null;
    public static SSLServerSocketFactory sslServerSocketfactory ;

   Master(SSLSocket s) {
      this.sslSocket = s;
   }

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

    System.out.println("Listening");
    sslServerSocketfactory = (SSLServerSocketFactory) SSLServerSocketFactory.getDefault();
    sslServerSocket = (SSLServerSocket) sslServerSocketfactory.createServerSocket(7777);


   while (true) 
   {

        sslSocket = (SSLSocket) sslServerSocket.accept();
        sslSocket.setEnabledCipherSuites(sslServerSocketfactory.getSupportedCipherSuites());       
        System.setProperty("javax.net.ssl.keyStore", "Master_keystore.jks");
        System.setProperty("javax.net.ssl.keyStorePassword", "passwd1");

        System.out.println("Connected");
        new Thread(new Master(sslSocket)).start();

    }
 }
public void run() {
   synchronized(this){
         do{
               try{      
        //here is the error
                ObjectOutputStream  objout = new ObjectOutputStream(sslSocket.getOutputStream());
                ObjectInputStream  objin = new ObjectInputStream(sslSocket.getInputStream());

                /* code */

            } catch (Exception ex) {
           Logger.getLogger(Master.class.getName()).log(Level.SEVERE, null, ex);}

        }while(true);
      }
   }

}

我的客户端代码如下

SSLSocketFactory sslsocketfactory = (SSLSocketFactory) SSLSocketFactory.getDefault();
SSLSocket sslsocket = (SSLSocket) sslsocketfactory.createSocket("localhost", 7777);
sslsocket.setEnabledCipherSuites(sslsocketfactory.getSupportedCipherSuites());  
System.setProperty("javax.net.ssl.keyStore", "Client_keystore.jks");
System.setProperty("javax.net.ssl.keyStorePassword", "passwd2");
 try {
        do {
            ObjectOutputStream  objout = new ObjectOutputStream(sslsocket.getOutputStream());
            ObjectInputStream   objin = new ObjectInputStream(sslsocket.getInputStream());
              /* code*/
      } while (true);


  } catch (Exception ex) {
       System.out.println(ex.getMessage());
  }

我得到的异常是:

SEVERE: null
javax.net.ssl.SSLException: Connection has been shutdown:                 javax.net.ssl.SSLHandshakeException: no cipher suites in common
at sun.security.ssl.SSLSocketImpl.checkEOF(SSLSocketImpl.java:1541)
at sun.security.ssl.SSLSocketImpl.checkWrite(SSLSocketImpl.java:1553)
at sun.security.ssl.AppOutputStream.write(AppOutputStream.java:71)
at java.io.ObjectOutputStream$BlockDataOutputStream.drain(ObjectOutputStream.java:1877)
at java.io.ObjectOutputStream$BlockDataOutputStream.setBlockDataMode(ObjectOutputStream.java:1786)
at java.io.ObjectOutputStream.<init>(ObjectOutputStream.java:247)
at master.Master.run(Master.java:233)
at java.lang.Thread.run(Thread.java:745)
Caused by: javax.net.ssl.SSLHandshakeException: no cipher suites in common
at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1949)
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:302)
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:292)
at sun.security.ssl.ServerHandshaker.chooseCipherSuite(ServerHandshaker.java:1035)
at sun.security.ssl.ServerHandshaker.clientHello(ServerHandshaker.java:738)
at sun.security.ssl.ServerHandshaker.processMessage(ServerHandshaker.java:221)
at sun.security.ssl.Handshaker.processLoop(Handshaker.java:979)
at sun.security.ssl.Handshaker.process_record(Handshaker.java:914)
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1062)
at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375)
at sun.security.ssl.SSLSocketImpl.writeRecord(SSLSocketImpl.java:747)
at sun.security.ssl.AppOutputStream.write(AppOutputStream.java:123)
... 5 more

谁能给我一个解决方案？

Answer 1

public static SSLSocket sslSocket = null;

问题就在这里。绝对没有理由让这个变量成为static。不要使用 static，除非您确切地知道为什么要这样做。