TLSv1.2 SSL聊天Java，SSLContext不可用

Question

我在运行SSL聊天程序时遇到问题。我在Ubuntu中使用Eclipse。我试着运行这个代码

 import java.net.*;
import java.io.*;
import javax.net.ssl.*;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.Principal;
import java.security.cert.*;
public class SSLSocketClient {
    private static String host;
    public static void main(String[] args) {
        String cipher = null;
        String portNo;
                int port = 0;
        boolean mykeystore = false;
        boolean chat = false;
        if (args.length == 5) {
            for (int i = 0; i < args.length; i++) {
                if (args[i].equals("-host")) {
                    host = args[++i];
                    continue;
                }
                if (args[i].equals("-port")) {
                    portNo = args[++i];
                    port = Integer.parseInt(portNo);
                    continue;
                }
                if (args[i].equals("-cipher")) {
                    cipher = args[++i];
                    continue;
                }
                if (args[i].equals("-chat")) {
                    chat = true;
                    continue;
                }
                if (args[i].equals("-mykeystore")) {
                    mykeystore = true;
                    continue;
                }
            }
        }
        else {
            System.out.println("Please check again parameter!");
        }
        if (mykeystore) {
            System.setProperty("javax.net.ssl.trustStore", "mykeystore");
            System.setProperty("javax.net.ssl.trustStorePassword", "kosuke");
        }
        SSLContext sc;
        try {
            sc = SSLContext.getInstance("TLSv1.2");
            sc.init(null, null, null);
            SSLSocketFactory factory = (SSLSocketFactory) sc.getSocketFactory();
        SSLSocket mysslsocket = (SSLSocket) factory.createSocket(host, port);
            if (cipher != null) {
                String[] cipherarray = { cipher };
                mysslsocket.setEnabledCipherSuites(cipherarray);
            }
            SSLSession session= mysslsocket.getSession();
            X509Certificate cert;

            // cert = (X509Certificate) session.getPeerCertificates()[0];
        //  System.out.println(session.getPeerHost() + "has presented a certificate belonging to: ");
            //Principal p=cert.getSubjectDN();


            //if(chat) {
                //BufferedReader in = new BufferedReader( new InputStreamReader(System.in));
                //BufferedWriter out = new BufferedWriter( new OutputStreamWriter( mysslsocket.getOutputStream()));
                //while(true) {
                    //String s= in.readLine();
                        //if (!s.equals("")) {
                            //out.write(s);
                            //out.write(" rn ");
                            //out.flush();
                            //if (s.equals(".")) break;
                    //  }
                //}
        //  }
            mysslsocket.startHandshake();
            mysslsocket.close();
        } catch (NoSuchAlgorithmException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (UnknownHostException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (KeyManagementException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

当我试图在终端中运行参数时

java SSLSocketClient -host localhost -port 11111 -mykeystore

我得到的回复是：

java.security.NoSuchAlgorithmException: TLSv1.2 SSLContext not available
    at sun.security.jca.GetInstance.getInstance(GetInstance.java:159)
    at javax.net.ssl.SSLContext.getInstance(SSLContext.java:142)
    at SSLSocketClient.main(SSLSocketClient.java:61)

我不知道我的代码出了什么问题。我已经将密钥库复制到程序源代码中，但仍然无法工作。请帮我

感谢

Answer 1

TLSv1.2直到Java 7才添加到默认的JCE提供程序中。请参阅Java 6和Java 7标准算法名称参考资料。

如果您使用Java 6或更早版本，并且绝对需要TLS 1.2，请尝试Bouncy Castle提供程序。