参考链接：http://blog.csdn.net/lingshi210/article/details/52439050

mqtt 的ssl配置可以参阅 
http://houjixin.blog.163.com/blog/static/35628410201432205042955/

然后注意开启防火墙端口。

mqtt的命令和Java端的ssl 必须同时要带上ca.crt、clilent.crt、client.key三个文件，即CA证书、客户证书、客户私钥。

由于java 端不支持client.key的格式，需要命令进行转化

openssl pkcs8 -topk8 -in client.key -out client.pem -nocrypt

另外： 
不知为何ubuntu下关闭防火墙后还是握手失败，cenos下正常，抓包后已经看不到明文了。

Java部分：

1.核心部分只需要设置SSLSocketFactory

MqttConnectOptions options = new MqttConnectOptions();

SSLSocketFactory factory=getSSLSocktet("youpath/ca.crt","youpath/client.crt","youpath/client.pem","password");

options.setSocketFactory(factory);

2.自定义SSLSocketFactory （改进于http://gist.github.com/4104301）

此处的密码应为生成证书的时候输入的密码，未认证。

private SSLSocketFactory getSSLSocktet(String caPath,String crtPath, String keyPath, String password) throws Exception {

        // CA certificate is used to authenticate server

        CertificateFactory cAf = CertificateFactory.getInstance("X.509");

        FileInputStream caIn = new FileInputStream(caPath);

        X509Certificate ca = (X509Certificate) cAf.generateCertificate(caIn);

         KeyStore caKs = KeyStore.getInstance("JKS");

         caKs.load(null, null);

         caKs.setCertificateEntry("ca-certificate", ca);

         TrustManagerFactory tmf = TrustManagerFactory.getInstance("PKIX");

         tmf.init(caKs);

        CertificateFactory cf = CertificateFactory.getInstance("X.509");

        FileInputStream crtIn = new FileInputStream(crtPath);

        X509Certificate caCert = (X509Certificate) cf.generateCertificate(crtIn);

        crtIn.close();

        // client key and certificates are sent to server so it can authenticate

        // us

        KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());

//      ks.load(caIn,password.toCharArray());

        ks.load(null, null);

        ks.setCertificateEntry("certificate", caCert);

        ks.setKeyEntry("private-key", getPrivateKey(keyPath), password.toCharArray(),

                new java.security.cert.Certificate[]{caCert}  );

        KeyManagerFactory kmf = KeyManagerFactory.getInstance("PKIX");

        kmf.init(ks, password.toCharArray());

//      keyIn.close();

        // finally, create SSL socket factory

        SSLContext context = SSLContext.getInstance("TLSv1");

        context.init(kmf.getKeyManagers(),tmf.getTrustManagers(), new SecureRandom());

        return context.getSocketFactory();

    }

Android上会报错，改进如下：

    private SSLSocketFactory getSSLSocktet(String caPath,String crtPath, String keyPath, String password) throws Exception {

        // CA certificate is used to authenticate server

        CertificateFactory cAf = CertificateFactory.getInstance("X.509");

        FileInputStream caIn = new FileInputStream(caPath);

        X509Certificate ca = (X509Certificate) cAf.generateCertificate(caIn);

         KeyStore caKs = KeyStore.getInstance(KeyStore.getDefaultType());

         caKs.load(null, null);

         caKs.setCertificateEntry("ca-certificate", ca);

         TrustManagerFactory tmf = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());

         tmf.init(caKs);

         caIn.close();

        CertificateFactory cf = CertificateFactory.getInstance("X.509");

        FileInputStream crtIn = new FileInputStream(crtPath);

        X509Certificate caCert = (X509Certificate) cf.generateCertificate(crtIn);

        crtIn.close();

        // client key and certificates are sent to server so it can authenticate

        // us

        KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());

//      ks.load(caIn,password.toCharArray());

        ks.load(null, null);

        ks.setCertificateEntry("certificate", caCert);

        ks.setKeyEntry("private-key", getPrivateKey(keyPath), password.toCharArray(),

                new java.security.cert.Certificate[]{caCert}  );

        KeyManagerFactory kmf = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());

        kmf.init(ks, password.toCharArray());

//      keyIn.close();

        // finally, create SSL socket factory

        SSLContext context = SSLContext.getInstance("TLSv1");

        context.init(kmf.getKeyManagers(),tmf.getTrustManagers(), new SecureRandom());

        return context.getSocketFactory();

    }

3.获取私钥代码部分

由于只能读取PKCS8的格式，所以需要转成pem

    public PrivateKey getPrivateKey(String path) throws Exception{  

        org.apache.commons.codec.binary.Base64 base64=new Base64();

        byte[] buffer=   base64.decode(getPem(path)); 

        PKCS8EncodedKeySpec keySpec= new PKCS8EncodedKeySpec(buffer);

        KeyFactory keyFactory= KeyFactory.getInstance("RSA");

        return (RSAPrivateKey) keyFactory.generatePrivate(keySpec);  

    }

附录：

package com;

import java.awt.BorderLayout;

import java.awt.Container;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.io.BufferedReader;

import java.io.FileInputStream;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.security.KeyFactory;

import java.security.KeyStore;

import java.security.PrivateKey;

import java.security.SecureRandom;

import java.security.cert.CertificateException;

import java.security.cert.CertificateFactory;

import java.security.cert.X509Certificate;

import java.security.interfaces.RSAPrivateKey;

import java.security.spec.PKCS8EncodedKeySpec;

import javax.net.ssl.KeyManagerFactory;

import javax.net.ssl.SSLContext;

import javax.net.ssl.SSLSocketFactory;

import javax.net.ssl.TrustManager;

import javax.net.ssl.TrustManagerFactory;

import javax.net.ssl.X509TrustManager;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

import javax.swing.JTextArea;

import org.apache.commons.codec.binary.Base64;

import org.eclipse.paho.client.mqttv3.IMqttDeliveryToken;

import org.eclipse.paho.client.mqttv3.MqttCallback;

import org.eclipse.paho.client.mqttv3.MqttClient;

import org.eclipse.paho.client.mqttv3.MqttConnectOptions;

import org.eclipse.paho.client.mqttv3.MqttMessage;

import org.eclipse.paho.client.mqttv3.MqttTopic;

import org.eclipse.paho.client.mqttv3.internal.security.SSLSocketFactoryFactory;

import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;

public class Server extends JFrame {

    private static final long serialVersionUID = 1L;

    private JPanel panel;

    private JPanel panelText;

    private JPanel panelText2;

    private JButton button;

    private JButton button2;

    private JButton subscribeButton;

    private JTextArea textHost;

    private JTextArea textClientID;

    private JTextArea textPublishMsg;

    private JTextArea textTopic;

    private MqttClient client;

    private String host = "ssl://192.168.10.233:1883";

    private MqttTopic topic;

    private MqttMessage message;

    private String userToken = "999999";

    private String myTopicRoot = "test";

    private String myTopic = null;

    private String clienID = "test1234567";

    public Server() {

        Container container = this.getContentPane();

        panel = new JPanel();

        panelText = new JPanel();

        panelText2 = new JPanel();

        button = new JButton("发布主题消息");

        button2 = new JButton("更换客户机地址和IP");

        button.addActionListener(new ActionListener() {

            @Override

            public void actionPerformed(ActionEvent ae) {

                try {

                    host = textHost.getText();

                    clienID = textClientID.getText();

                    if (client == null) {

                        client = new MqttClient(host, clienID, new MemoryPersistence());

                    }

                    if (!client.isConnected()) {

                        connect();

                    }

                    publishMsg(textTopic.getText(), textPublishMsg.getText());

                } catch (Exception e) {

                    e.printStackTrace();

                    showErrorMsg(e.toString());

                }

            }

        });

        button2.addActionListener(new ActionListener() {

            @Override

            public void actionPerformed(ActionEvent arg0) {

                // TODO Auto-generated method stub

                host = textHost.getText();

                clienID = textClientID.getText();

                try {

                    if (client != null)

                        client.disconnectForcibly();

                    client = new MqttClient(host, clienID, new MemoryPersistence());

                    connect();

                } catch (Exception e) {

                    e.printStackTrace();

                    showErrorMsg(e.toString());

                }

            }

        });

        subscribeButton = new JButton("订阅主题");

        subscribeButton.addActionListener(new ActionListener() {

            @Override

            public void actionPerformed(ActionEvent arg0) {

                // TODO Auto-generated method stub

                try {

                    if (client == null) {

                        client = new MqttClient(host, clienID, new MemoryPersistence());

                    }

                    if (!client.isConnected()) {

                        connect();

                    }

                    if (myTopic != null && !myTopic.equals(textTopic.getText())) {

                        client.subscribe(myTopic);

                    }

                    client.subscribe(textTopic.getText());

                    myTopic = textTopic.getText();

                } catch (Exception e) {

                    e.printStackTrace();

                    showErrorMsg(e.toString());

                }

            }

        });

        textHost = new JTextArea();

        textHost.setText(host);

        textClientID = new JTextArea();

        textClientID.setText(clienID);

        panel.add(button);

        panel.add(subscribeButton);

        panelText.add(button2);

        panelText.add(new JLabel("mqtt地址"));

        panelText.add(textHost);

        panelText.add(new JLabel("ClienId"));

        panelText.add(textClientID);

        panelText.add(new JLabel("主题"));

        textTopic = new JTextArea();

        textTopic.setText(myTopicRoot);

        panelText.add(textTopic);

        textPublishMsg = new JTextArea();

        textPublishMsg.setText("@" + userToken + "@E@5@" + userToken + "@");

        panelText2.add(new JLabel("mqtt消息"));

        panelText2.add(textPublishMsg);

        container.add(panel, BorderLayout.NORTH);

        container.add(panelText, BorderLayout.CENTER);

        container.add(panelText2, BorderLayout.SOUTH);

        // try {

        // client = new MqttClient(host, clienID,

        // new MemoryPersistence());

        // connect();

        // } catch (Exception e) {

        // showErrorMsg(e.toString());

        // }

    }

    private SSLSocketFactory getSSLSocktet(String caPath,String crtPath, String keyPath, String password) throws Exception {

        // CA certificate is used to authenticate server

        CertificateFactory cAf = CertificateFactory.getInstance("X.509");

        FileInputStream caIn = new FileInputStream(caPath);

        X509Certificate ca = (X509Certificate) cAf.generateCertificate(caIn);

         KeyStore caKs = KeyStore.getInstance("JKS");

         caKs.load(null, null);

         caKs.setCertificateEntry("ca-certificate", ca);

         TrustManagerFactory tmf = TrustManagerFactory.getInstance("PKIX");

         tmf.init(caKs);

        CertificateFactory cf = CertificateFactory.getInstance("X.509");

        FileInputStream crtIn = new FileInputStream(crtPath);

        X509Certificate caCert = (X509Certificate) cf.generateCertificate(crtIn);

        crtIn.close();

        // client key and certificates are sent to server so it can authenticate

        // us

        KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());

//      ks.load(caIn,password.toCharArray());

        ks.load(null, null);

        ks.setCertificateEntry("certificate", caCert);

        ks.setKeyEntry("private-key", getPrivateKey(keyPath), password.toCharArray(),

                new java.security.cert.Certificate[]{caCert}  );

        KeyManagerFactory kmf = KeyManagerFactory.getInstance("PKIX");

        kmf.init(ks, password.toCharArray());

//      keyIn.close();

        // finally, create SSL socket factory

        SSLContext context = SSLContext.getInstance("TLSv1");

        context.init(kmf.getKeyManagers(),tmf.getTrustManagers(), new SecureRandom());

        return context.getSocketFactory();

    }

    private String getPem(String path) throws Exception{

        FileInputStream fin=new FileInputStream(path);

        BufferedReader br= new BufferedReader(new InputStreamReader(fin));

        String readLine= null;

        StringBuilder sb= new StringBuilder();

        while((readLine= br.readLine())!=null){

            if(readLine.charAt(0)=='-'){

                continue;

            }else{

                sb.append(readLine);

                sb.append('\r');

            }

        }

        fin.close();

        return sb.toString();

    }

    public PrivateKey getPrivateKey(String path) throws Exception{  

        org.apache.commons.codec.binary.Base64 base64=new Base64();

        byte[] buffer=   base64.decode(getPem(path)); 

        PKCS8EncodedKeySpec keySpec= new PKCS8EncodedKeySpec(buffer);

        KeyFactory keyFactory= KeyFactory.getInstance("RSA");

        return (RSAPrivateKey) keyFactory.generatePrivate(keySpec);  

    }  

    private void connect() {

        MqttConnectOptions options = new MqttConnectOptions();

        options.setCleanSession(false);

        // options.setUserName(userName);

        // options.setPassword(passWord.toCharArray());

        // 设置超时时间

        // options.setConnectionTimeout(10);

        // 设置会话心跳时间

        // options.setKeepAliveInterval(20);

        // try {

        // options.setWill("willtest", "SENDgpslost".getBytes(), 1, false);

        // } catch (Exception e1) {

        // // TODO Auto-generated catch block

        // System.out.print(e1);

        // }

        try {

            if (!SSLSocketFactoryFactory.isSupportedOnJVM()) {

                System.out.print("isSupportedOnJVM=false");

            }

            SSLSocketFactory factory=getSSLSocktet("F:/ssl/ca.crt","F:/ssl/client.crt","F:/ssl/client.pem","brt123");

            options.setSocketFactory(factory);

            client.setCallback(new MqttCallback() {

                @Override

                public void connectionLost(Throwable cause) {

                    System.out.println("connectionLost-----------");

                }

                @Override

                public void deliveryComplete(IMqttDeliveryToken token) {

                    System.out.println("deliveryComplete---------" + token.isComplete());

                }

                @Override

                public void messageArrived(String topic, MqttMessage arg1) throws Exception {

                    System.out.println("messageArrived----------");

                    String msg = new String(arg1.getPayload());

                    showErrorMsg("主题：" + topic + "\r\n消息：" + msg);

                }

            });

            topic = client.getTopic(myTopicRoot + userToken);

            client.connect(options);

        } catch (Exception e) {

            e.printStackTrace();

        }

    }

    public void publishMsg(String topoc, String msg) {

        message = new MqttMessage();

        message.setQos(0);

        message.setRetained(false);

        System.out.println(message.isRetained() + "------ratained状态");

        try {

            message.setPayload(msg.getBytes("UTF-8"));

            client.publish(topoc, message);

        } catch (Exception e) {

            e.printStackTrace();

            showErrorMsg(e.toString());

        }

    }

    private void showErrorMsg(String msg) {

        JOptionPane.showMessageDialog(null, msg);

    }

}

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