DTLS编写样例二（基于DTLSConnector）

ExampleDTLSClient：

/******************************************************************************* * Copyright (c) 2015 Institute for Pervasive Computing, ETH Zurich and others. *  * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * and Eclipse Distribution License v1.0 which accompany this distribution. *  * The Eclipse Public License is available at *    http://www.eclipse.org/legal/epl-v10.html * and the Eclipse Distribution License is available at *    http://www.eclipse.org/org/documents/edl-v10.html. *  * Contributors: *    Matthias Kovatsch - creator and main architect *    Stefan Jucker - DTLS implementation ******************************************************************************/package org.eclipse.californium.scandium.examples;import java.io.FileInputStream;import java.io.IOException;import java.io.InputStream;import java.net.InetSocketAddress;import java.security.GeneralSecurityException;import java.security.KeyStore;import java.security.PrivateKey;import java.security.cert.Certificate;import java.util.concurrent.CountDownLatch;import java.util.concurrent.TimeUnit;import java.util.logging.Level;import java.util.logging.Logger;import org.eclipse.californium.elements.RawData;import org.eclipse.californium.elements.RawDataChannel;import org.eclipse.californium.scandium.DTLSConnector;import org.eclipse.californium.scandium.ScandiumLogger;import org.eclipse.californium.scandium.config.DtlsConnectorConfig;import org.eclipse.californium.scandium.dtls.pskstore.StaticPskStore;public class ExampleDTLSClient {static {ScandiumLogger.initialize();ScandiumLogger.setLevel(Level.FINE);}private static final int DEFAULT_PORT = 5684;private static final Logger LOG = Logger.getLogger(ExampleDTLSClient.class.getName());private static final String TRUST_STORE_PASSWORD = "rootPass";private static final String KEY_STORE_PASSWORD = "endPass";private static final String KEY_STORE_LOCATION = "../certs/keyStore.jks";private static final String TRUST_STORE_LOCATION = "../certs/trustStore.jks";private DTLSConnector dtlsConnector;public ExampleDTLSClient(final CountDownLatch latch) {InputStream inTrust = null;InputStream in = null;try {// load key storeKeyStore keyStore = KeyStore.getInstance("JKS");in = new FileInputStream(KEY_STORE_LOCATION);keyStore.load(in, KEY_STORE_PASSWORD.toCharArray());// load trust storeKeyStore trustStore = KeyStore.getInstance("JKS");inTrust = new FileInputStream(TRUST_STORE_LOCATION);trustStore.load(inTrust, TRUST_STORE_PASSWORD.toCharArray());// You can load multiple certificates if neededCertificate[] trustedCertificates = new Certificate[1];trustedCertificates[0] = trustStore.getCertificate("root");DtlsConnectorConfig.Builder builder = new DtlsConnectorConfig.Builder(new InetSocketAddress(0));builder.setPskStore(new StaticPskStore("Client_identity", "secretPSK".getBytes()));builder.setIdentity((PrivateKey)keyStore.getKey("client", KEY_STORE_PASSWORD.toCharArray()),keyStore.getCertificateChain("client"), true);builder.setTrustStore(trustedCertificates);dtlsConnector = new DTLSConnector(builder.build(), null);dtlsConnector.setRawDataReceiver(new RawDataChannel() {@Overridepublic void receiveData(RawData raw) {LOG.log(Level.INFO, "Received response: {0}", new String(raw.getBytes()));latch.countDown();dtlsConnector.destroy();}});} catch (GeneralSecurityException | IOException e) {LOG.log(Level.SEVERE, "Could not load the keystore", e);} finally {try {if (inTrust != null) {inTrust.close();}if (in != null) {in.close();}} catch (IOException e) {LOG.log(Level.SEVERE, "Cannot close key store file", e);}}}private void test(InetSocketAddress peer) {try {dtlsConnector.start();dtlsConnector.send(new RawData("HELLO WORLD".getBytes(), peer));} catch (IOException e) {LOG.log(Level.SEVERE, "Cannot send message", e);}}public static void main(String[] args) throws InterruptedException {final CountDownLatch latch = new CountDownLatch(1);ExampleDTLSClient client = new ExampleDTLSClient(latch);InetSocketAddress peer = new InetSocketAddress("localhost", DEFAULT_PORT);if (args.length == 2) {peer = new InetSocketAddress(args[0], Integer.parseInt(args[1]));}client.test(peer);latch.await(5, TimeUnit.SECONDS);}}

ExampleDTLSServer

/******************************************************************************* * Copyright (c) 2015 Institute for Pervasive Computing, ETH Zurich and others. *  * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * and Eclipse Distribution License v1.0 which accompany this distribution. *  * The Eclipse Public License is available at *    http://www.eclipse.org/legal/epl-v10.html * and the Eclipse Distribution License is available at *    http://www.eclipse.org/org/documents/edl-v10.html. *  * Contributors: *    Matthias Kovatsch - creator and main architect *    Stefan Jucker - DTLS implementation ******************************************************************************/package org.eclipse.californium.scandium.examples;import java.io.FileInputStream;import java.io.IOException;import java.io.InputStream;import java.net.InetSocketAddress;import java.security.GeneralSecurityException;import java.security.KeyStore;import java.security.PrivateKey;import java.security.cert.Certificate;import java.util.logging.Level;import java.util.logging.Logger;import org.eclipse.californium.elements.Connector;import org.eclipse.californium.elements.RawData;import org.eclipse.californium.elements.RawDataChannel;import org.eclipse.californium.scandium.DTLSConnector;import org.eclipse.californium.scandium.ScandiumLogger;import org.eclipse.californium.scandium.config.DtlsConnectorConfig;import org.eclipse.californium.scandium.dtls.pskstore.InMemoryPskStore;public class ExampleDTLSServer {static {ScandiumLogger.initialize();ScandiumLogger.setLevel(Level.FINE);}private static final int DEFAULT_PORT = 5684; private static final Logger LOG = Logger.getLogger(ExampleDTLSServer.class.getName());private static final String TRUST_STORE_PASSWORD = "rootPass";private static final String KEY_STORE_PASSWORD = "endPass";private static final String KEY_STORE_LOCATION = "../certs/keyStore.jks";private static final String TRUST_STORE_LOCATION = "../certs/trustStore.jks";private DTLSConnector dtlsConnector;public ExampleDTLSServer() {InMemoryPskStore pskStore = new InMemoryPskStore();// put in the PSK store the default identity/psk for tinydtls testspskStore.setKey("Client_identity", "secretPSK".getBytes());InputStream in = null;try {// load the key storeKeyStore keyStore = KeyStore.getInstance("JKS");in = new FileInputStream(KEY_STORE_LOCATION);keyStore.load(in, KEY_STORE_PASSWORD.toCharArray());// load the trust storeKeyStore trustStore = KeyStore.getInstance("JKS");InputStream inTrust = new FileInputStream(TRUST_STORE_LOCATION);trustStore.load(inTrust, TRUST_STORE_PASSWORD.toCharArray());// You can load multiple certificates if neededCertificate[] trustedCertificates = new Certificate[1];trustedCertificates[0] = trustStore.getCertificate("root");DtlsConnectorConfig.Builder builder = new DtlsConnectorConfig.Builder(new InetSocketAddress(DEFAULT_PORT));builder.setPskStore(pskStore);builder.setIdentity((PrivateKey)keyStore.getKey("server", KEY_STORE_PASSWORD.toCharArray()),keyStore.getCertificateChain("server"), true);builder.setTrustStore(trustedCertificates);dtlsConnector = new DTLSConnector(builder.build(), null);dtlsConnector.setRawDataReceiver(new RawDataChannelImpl(dtlsConnector));} catch (GeneralSecurityException | IOException e) {LOG.log(Level.SEVERE, "Could not load the keystore", e);} finally {if (in != null) {try {in.close();} catch (IOException e) {LOG.log(Level.SEVERE, "Cannot close key store file", e);}}}}public void start() {try {dtlsConnector.start();} catch (IOException e) {throw new IllegalStateException("Unexpected error starting the DTLS UDP server",e);}}private class RawDataChannelImpl implements RawDataChannel {private Connector connector;public RawDataChannelImpl(Connector con) {this.connector = con;}@Overridepublic void receiveData(final RawData raw) {LOG.log(Level.INFO, "Received request: {0}", new String(raw.getBytes()));connector.send(new RawData("ACK".getBytes(), raw.getAddress(), raw.getPort()));}}public static void main(String[] args) {ExampleDTLSServer server = new ExampleDTLSServer();server.start();}}