[网络协议]解决jdk1.6不支持TLS1.2协议的问题（javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failure）

解决jdk1.6不支持TLS1.2协议的问题

项目场景：

两个系统对接，A方项目基于jdk1.6，B方项目基于jdk1.8,场景中A项目需要调用B项目的远程接口（https）

问题描述：

发现调用失败（javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failure）

原因分析：

B项目使用JDK1.8，https协议支持TLS1.2，而B项目是JDK1.6默认不支持TLS1.2 ，所以导致捂手失败

解决方案：

实际项目通过该方式已解决

引入依赖（jar包下载地址 https://mvnrepository.com/）版本一定跟我保持一致，作者已踩坑

<dependency>
    <groupId>org.bouncycastle</groupId>
    <artifactId>bcprov-jdk15on</artifactId>
    <version>1.54</version>
</dependency>

编写工具类

/**
 * 用来请求远程地址，https/http 解决jdk1.6不支持tls1.2的问题
 * @author lmc
 *
 */
public class TLSSocketConnectionFactory extends SSLSocketFactory {
 
    static {
        if (Security.getProvider(BouncyCastleProvider.PROVIDER_NAME) == null) {
            Security.addProvider(new BouncyCastleProvider());
        }
    }
 
    @Override
    public Socket createSocket(Socket socket, final String host, int port,
                               boolean arg3) throws IOException {
        if (socket == null) {
            socket = new Socket();
        }
        if (!socket.isConnected()) {
            socket.connect(new InetSocketAddress(host, port));
        }
 
        final TlsClientProtocol tlsClientProtocol = new  TlsClientProtocol(socket.getInputStream(), socket.getOutputStream(), new     SecureRandom());
 
        return _createSSLSocket(host, tlsClientProtocol);
    }
 
    @Override public String[] getDefaultCipherSuites() { return null; }
    @Override public String[] getSupportedCipherSuites() { return null; }
    @Override public Socket createSocket(String host, int port) throws IOException, UnknownHostException { return null; }
    @Override public Socket createSocket(InetAddress host, int port) throws IOException { return null; }
    @Override public Socket createSocket(String host, int port, InetAddress localHost, int localPort) throws IOException, UnknownHostException { return null; }
    @Override public Socket createSocket(InetAddress address, int port, InetAddress localAddress, int localPort) throws IOException { return null; }
 
    private SSLSocket _createSSLSocket(final String host, final TlsClientProtocol tlsClientProtocol) {
        return new SSLSocket() {
            private java.security.cert.Certificate[] peertCerts;
 
            @Override public InputStream getInputStream() throws IOException { return tlsClientProtocol.getInputStream(); }
            @Override public OutputStream getOutputStream() throws IOException { return tlsClientProtocol.getOutputStream(); }
            @Override public synchronized void close() throws IOException { tlsClientProtocol.close(); }
            @Override public void addHandshakeCompletedListener( HandshakeCompletedListener arg0) { }
            @Override public boolean getEnableSessionCreation() { return false; }
            @Override public String[] getEnabledCipherSuites() { return null; }
            @Override public String[] getEnabledProtocols() { return null; }
            @Override public boolean getNeedClientAuth() { return false; }
 
            @Override
            public SSLSession getSession() {
                return new SSLSession() {
 
                    /*原本这些方法都是直接throw UnsupportedOperationException 导致看不到真实异常*/
                    public int getApplicationBufferSize() {
                        return 0;
                    }
                    public String getCipherSuite() { return null; }
                    public long getCreationTime() { return 0; }
                    public byte[] getId() { return null; }
                    public long getLastAccessedTime() { return 0; }
                    public java.security.cert.Certificate[] getLocalCertificates() { return null; }
                    public Principal getLocalPrincipal() { return null; }
                    public int getPacketBufferSize() { return 0; }
                    public X509Certificate[] getPeerCertificateChain() throws SSLPeerUnverifiedException { return null; }
                    public java.security.cert.Certificate[] getPeerCertificates() throws SSLPeerUnverifiedException { return peertCerts; }
                    public String getPeerHost() { return null; }
                    public int getPeerPort() { return 0; }
                    public Principal getPeerPrincipal() throws SSLPeerUnverifiedException { return null; }
                    public String getProtocol() { return null; }
                    public SSLSessionContext getSessionContext() { return null; }
                    public Object getValue(String arg0) { return null; }
                    public String[] getValueNames() { return null; }
                    public void invalidate() { return; }
                    public boolean isValid() { return true; }
                    public void putValue(String arg0, Object arg1) { return; }
                    public void removeValue(String arg0) {
                        return;
                    }
                };
            }
 
            @Override public String[] getSupportedProtocols() { return null; }
            @Override public boolean getUseClientMode() { return false; }
            @Override public boolean getWantClientAuth() { return false; }
            @Override public void removeHandshakeCompletedListener(HandshakeCompletedListener arg0) { }
            @Override public void setEnableSessionCreation(boolean arg0) { }
            @Override public void setEnabledCipherSuites(String[] arg0) { }
            @Override public void setEnabledProtocols(String[] arg0) { }
            @Override public void setNeedClientAuth(boolean arg0) { }
            @Override public void setUseClientMode(boolean arg0) { }
            @Override public void setWantClientAuth(boolean arg0) { }
            @Override public String[] getSupportedCipherSuites() { return null; }
 
            @Override
            public void startHandshake() throws IOException {
                tlsClientProtocol.connect(new DefaultTlsClient() {
 
                    @SuppressWarnings("unchecked")
                    @Override
                    public Hashtable<Integer, byte[]> getClientExtensions() throws IOException {
                        Hashtable<Integer, byte[]> clientExtensions = super.getClientExtensions();
                        if (clientExtensions == null) {
                            clientExtensions = new Hashtable<Integer, byte[]>();
                        }
 
                        //Add host_name
                        byte[] host_name = host.getBytes();
 
                        final ByteArrayOutputStream baos = new ByteArrayOutputStream();
                        final DataOutputStream dos = new DataOutputStream(baos);
                        dos.writeShort(host_name.length + 3);
                        dos.writeByte(0);
                        dos.writeShort(host_name.length);
                        dos.write(host_name);
                        dos.close();
                        clientExtensions.put(ExtensionType.server_name, baos.toByteArray());
                        return clientExtensions;
                    }
 
                    public TlsAuthentication getAuthentication() throws IOException {
                        return new TlsAuthentication() {
 
                            public void notifyServerCertificate(Certificate serverCertificate) throws IOException {
                                try {
                                    KeyStore ks = _loadKeyStore();
 
                                    CertificateFactory cf = CertificateFactory.getInstance("X.509");
                                    List<java.security.cert.Certificate> certs = new LinkedList<java.security.cert.Certificate>();
                                    boolean trustedCertificate = false;
                                    for ( org.bouncycastle.asn1.x509.Certificate c : serverCertificate.getCertificateList()) {
                                        java.security.cert.Certificate cert = cf.generateCertificate(new ByteArrayInputStream(c.getEncoded()));
                                        certs.add(cert);
 
                                        String alias = ks.getCertificateAlias(cert);
                                        if(alias != null) {
                                            if (cert instanceof java.security.cert.X509Certificate) {
                                                try {
                                                    ( (java.security.cert.X509Certificate) cert).checkValidity();
                                                    trustedCertificate = true;
                                                } catch(CertificateExpiredException cee) {
                                                    // Accept all the certs!
                                                }
                                            }
                                        } else {
                                            // Accept all the certs!
                                        }
 
                                    }
                                    if (!trustedCertificate) {
                                        // Accept all the certs!
                                    }
                                    peertCerts = certs.toArray(new java.security.cert.Certificate[0]);
                                } catch (Exception ex) {
                                    ex.printStackTrace();
                                    throw new IOException(ex);
                                }
                            }
 
                            public TlsCredentials getClientCredentials(CertificateRequest certificateRequest) throws IOException {
                                return null;
                            }
 
                            private KeyStore _loadKeyStore() throws Exception {
                                FileInputStream trustStoreFis = null;
                                try {
                                    KeyStore localKeyStore = null;
 
                                    String trustStoreType = System.getProperty("javax.net.ssl.trustStoreType")!=null?System.getProperty("javax.net.ssl.trustStoreType"):KeyStore.getDefaultType();
                                    String trustStoreProvider = System.getProperty("javax.net.ssl.trustStoreProvider")!=null?System.getProperty("javax.net.ssl.trustStoreProvider"):"";
 
                                    if (trustStoreType.length() != 0) {
                                        if (trustStoreProvider.length() == 0) {
                                            localKeyStore = KeyStore.getInstance(trustStoreType);
                                        } else {
                                            localKeyStore = KeyStore.getInstance(trustStoreType, trustStoreProvider);
                                        }
 
                                        char[] keyStorePass = null;
                                        String str5 = System.getProperty("javax.net.ssl.trustStorePassword")!=null?System.getProperty("javax.net.ssl.trustStorePassword"):"";
 
                                        if (str5.length() != 0) {
                                            keyStorePass = str5.toCharArray();
                                        }
 
                                        localKeyStore.load(trustStoreFis, keyStorePass);
 
                                        if (keyStorePass != null) {
                                            for (int i = 0; i < keyStorePass.length; i++) {
                                                keyStorePass[i] = 0;
                                            }
                                        }
                                    }
                                    return localKeyStore;
                                }finally {
                                    if (trustStoreFis != null) {
                                        trustStoreFis.close();
                                    }
                                }
                            }
                        };
                    }
 
                });
            } 
        };
    }
    
	public static JSONObject send(String signData,String signURL,String requestMethod) {
//		SecurityLogger.logger.info("signURL:"+signURL);
//		SecurityLogger.logger.info("requestMethod:"+requestMethod);
		URL myurl = null;
		try {
			myurl = new URL(signURL);
		} catch (Exception e) {
			e.printStackTrace();
		}
 	 
		HttpsURLConnection con = null;
		try {
		    con = (HttpsURLConnection) myurl.openConnection();
		    con.setSSLSocketFactory(new TLSSocketConnectionFactory());
		    /*用于解决host name wrong问题，重写主机验证方法，如果请求正常可以去掉*/
		    con.setHostnameVerifier(new HostnameVerifier(){
				
				public boolean verify(String hostname, SSLSession session) {
					// TODO Auto-generated method stub
					return true;
				}
		    });
	
		    System.setProperty("sun.net.client.defaultConnectTimeout","300000");  
		    System.setProperty("sun.net.client.defaultReadTimeout", "300000");
			if("POST".equals(requestMethod)){
				con.setDoOutput(true);
			}
			con.setDoInput(true);
			con.setUseCaches(false);
			con.setInstanceFollowRedirects(true);
//			con.setRequestProperty("Content-type", "text/xml;charset=utf-8"); 
//			con.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)"); 
			System.out.println("start connect");
			con.connect();
			System.out.println("end connect");
		} catch (Exception e) {
			e.printStackTrace();
			
		}
		
		if("POST".equals(requestMethod)){
			OutputStream out = null;
			try { 
		
				out = con.getOutputStream();
				//os = new OutputStreamWriter(out);
				if(null!=signData){
					out.write(signData.getBytes("utf-8"));
				}
				out.flush();
				out.close();
				//os.write(signData);
			
				//os.flush(); 
			}catch(Exception ex){
				ex.printStackTrace();
			}
		}
		
		 
		//接收响应 
		StringBuffer buffer = null;
		try {
			
	        System.out.println("responsecode="+con.getResponseCode());
			BufferedReader br = new BufferedReader(new InputStreamReader(con.getInputStream(), "utf-8"));
			buffer=new StringBuffer();
            String line=null;
            while((line=br.readLine())!=null){
                buffer.append(line);
            }
			br.close();
			con.disconnect();
		} catch (Exception ioex) {
			ioex.printStackTrace();
		}
 
		System.out.println(buffer!=null?buffer.toString():null);
        return buffer!=null?JSONObject.parseObject(buffer.toString()):null;
//		return sb.toString();
		 
	}
	
	public static void main(String[] args) {
		JSONObject jsonObj = send(null,"https://devau33.cnooc.comss.cn/idp/oauth2/getToken?client_id=tmis&grant_type=authorization_code&client_secret=6c4cf0445ccd42ab8eaf63101e7a4602&code=122","POST");
		System.out.println(jsonObj.get("message"));
	}
}