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   1 /**
   2  * Copyright (c) 2010-2021 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.digitalstrom.internal.lib.serverconnection.impl;
  14
  15 import java.io.File;
  16 import java.io.FileInputStream;
  17 import java.io.FileNotFoundException;
  18 import java.io.FileWriter;
  19 import java.io.IOException;
  20 import java.io.InputStream;
  21 import java.net.HttpURLConnection;
  22 import java.net.MalformedURLException;
  23 import java.net.SocketTimeoutException;
  24 import java.net.URL;
  25 import java.nio.charset.StandardCharsets;
  26 import java.security.KeyManagementException;
  27 import java.security.NoSuchAlgorithmException;
  28 import java.security.SecureRandom;
  29 import java.security.Security;
  30 import java.security.cert.CertificateEncodingException;
  31 import java.security.cert.CertificateException;
  32 import java.security.cert.CertificateFactory;
  33 import java.security.cert.X509Certificate;
  34 import java.util.Base64;
  35
  36 import javax.net.ssl.HostnameVerifier;
  37 import javax.net.ssl.HttpsURLConnection;
  38 import javax.net.ssl.SSLContext;
  39 import javax.net.ssl.SSLHandshakeException;
  40 import javax.net.ssl.SSLSession;
  41 import javax.net.ssl.SSLSocketFactory;
  42 import javax.net.ssl.TrustManager;
  43 import javax.net.ssl.X509TrustManager;
  44
  45 import org.apache.commons.io.IOUtils;
  46 import org.apache.commons.lang.StringUtils;
  47 import org.openhab.binding.digitalstrom.internal.lib.config.Config;
  48 import org.openhab.binding.digitalstrom.internal.lib.manager.ConnectionManager;
  49 import org.openhab.binding.digitalstrom.internal.lib.serverconnection.HttpTransport;
  50 import org.openhab.binding.digitalstrom.internal.lib.serverconnection.simpledsrequestbuilder.constants.ParameterKeys;
  51 import org.slf4j.Logger;
  52 import org.slf4j.LoggerFactory;
  53
  54 /**
  55  * The {@link HttpTransportImpl} executes an request to the digitalSTROM-Server.
  56  * <p>
  57  * If a {@link Config} is given at the constructor. It sets the SSL-Certificate what is set in
  58  * {@link Config#getCert()}. If there is no SSL-Certificate, but an path to an external SSL-Certificate file what is set
  59  * in {@link Config#getTrustCertPath()} this will be set. If no SSL-Certificate is set in the {@link Config} it will be
  60  * red out from the server and set in {@link Config#setCert(String)}.
  61  *
  62  * <p>
  63  * If no {@link Config} is given the SSL-Certificate will be stored locally.
  64  *
  65  * <p>
  66  * The method {@link #writePEMCertFile(String)} saves the SSL-Certificate in a file at the given path. If all
  67  * SSL-Certificates shout be ignored the flag <i>exeptAllCerts</i> have to be true at the constructor
  68  * </p>
  69  * <p>
  70  * If a {@link ConnectionManager} is given at the constructor, the session-token is not needed by requests and the
  71  * {@link ConnectionListener}, which is registered at the {@link ConnectionManager}, will be automatically informed
  72  * about
  73  * connection state changes through the {@link #execute(String, int, int)} method.
  74  * </p>
  75  *
  76  * @author Michael Ochel - Initial contribution
  77  * @author Matthias Siegele - Initial contribution
  78  */
  79 public class HttpTransportImpl implements HttpTransport {
  80
  81     private static final String LINE_SEPERATOR = System.getProperty("line.separator");
  82     private static final String BEGIN_CERT = "-----BEGIN CERTIFICATE-----" + LINE_SEPERATOR;
  83     private static final String END_CERT = LINE_SEPERATOR + "-----END CERTIFICATE-----" + LINE_SEPERATOR;
  84
  85     private final Logger logger = LoggerFactory.getLogger(HttpTransportImpl.class);
  86     private static final short MAY_A_NEW_SESSION_TOKEN_IS_NEEDED = 1;
  87
  88     private String uri;
  89
  90     private int connectTimeout;
  91     private int readTimeout;
  92
  93     private Config config;
  94
  95     private ConnectionManager connectionManager;
  96
  97     private String cert;
  98     private SSLSocketFactory sslSocketFactory;
  99     private final HostnameVerifier hostnameVerifier = new HostnameVerifier() {
 100
 101         @Override
 102         public boolean verify(String arg0, SSLSession arg1) {
 103             return arg0.equals(arg1.getPeerHost()) || arg0.contains("dss.local.");
 104         }
 105     };
 106
 107     /**
 108      * Creates a new {@link HttpTransportImpl} with registration of the given {@link ConnectionManager} and set ignore
 109      * all SSL-Certificates. The {@link Config} will be automatically added from the configurations of the given
 110      * {@link ConnectionManager}.
 111      *
 112      * @param connectionManager to check connection, can be null
 113      * @param exeptAllCerts (true = all will ignore)
 114      */
 115     public HttpTransportImpl(ConnectionManager connectionManager, boolean exeptAllCerts) {
 116         this.connectionManager = connectionManager;
 117         this.config = connectionManager.getConfig();
 118         init(config.getHost(), config.getConnectionTimeout(), config.getReadTimeout(), exeptAllCerts);
 119     }
 120
 121     /**
 122      * Creates a new {@link HttpTransportImpl} with configurations of the given {@link Config} and set ignore all
 123      * SSL-Certificates.
 124      *
 125      * @param config to get configurations, must not be null
 126      * @param exeptAllCerts (true = all will ignore)
 127      */
 128     public HttpTransportImpl(Config config, boolean exeptAllCerts) {
 129         this.config = config;
 130         init(config.getHost(), config.getConnectionTimeout(), config.getReadTimeout(), exeptAllCerts);
 131     }
 132
 133     /**
 134      * Creates a new {@link HttpTransportImpl} with configurations of the given {@link Config}.
 135      *
 136      * @param config to get configurations, must not be null
 137      */
 138     public HttpTransportImpl(Config config) {
 139         this.config = config;
 140         init(config.getHost(), config.getConnectionTimeout(), config.getReadTimeout(), false);
 141     }
 142
 143     /**
 144      * Creates a new {@link HttpTransportImpl}.
 145      *
 146      * @param uri of the server, must not be null
 147      */
 148     public HttpTransportImpl(String uri) {
 149         init(uri, Config.DEFAULT_CONNECTION_TIMEOUT, Config.DEFAULT_READ_TIMEOUT, false);
 150     }
 151
 152     /**
 153      * Creates a new {@link HttpTransportImpl} and set ignore all SSL-Certificates.
 154      *
 155      * @param uri of the server, must not be null
 156      * @param exeptAllCerts (true = all will ignore)
 157      */
 158     public HttpTransportImpl(String uri, boolean exeptAllCerts) {
 159         init(uri, Config.DEFAULT_CONNECTION_TIMEOUT, Config.DEFAULT_READ_TIMEOUT, exeptAllCerts);
 160     }
 161
 162     /**
 163      * Creates a new {@link HttpTransportImpl}.
 164      *
 165      * @param uri of the server, must not be null
 166      * @param connectTimeout to set
 167      * @param readTimeout to set
 168      */
 169     public HttpTransportImpl(String uri, int connectTimeout, int readTimeout) {
 170         init(uri, connectTimeout, readTimeout, false);
 171     }
 172
 173     /**
 174      * Creates a new {@link HttpTransportImpl} and set ignore all SSL-Certificates..
 175      *
 176      * @param uri of the server, must not be null
 177      * @param connectTimeout to set
 178      * @param readTimeout to set
 179      * @param exeptAllCerts (true = all will ignore)
 180      */
 181     public HttpTransportImpl(String uri, int connectTimeout, int readTimeout, boolean exeptAllCerts) {
 182         init(uri, connectTimeout, readTimeout, exeptAllCerts);
 183     }
 184
 185     private void init(String uri, int connectTimeout, int readTimeout, boolean exeptAllCerts) {
 186         logger.debug("init HttpTransportImpl");
 187         this.uri = fixURI(uri);
 188         this.connectTimeout = connectTimeout;
 189         this.readTimeout = readTimeout;
 190         // Check SSL Certificate
 191         if (exeptAllCerts) {
 192             sslSocketFactory = generateSSLContextWhichAcceptAllSSLCertificats();
 193         } else {
 194             if (config != null) {
 195                 cert = config.getCert();
 196                 logger.debug("generate SSLcontext from config cert");
 197                 if (StringUtils.isNotBlank(cert)) {
 198                     sslSocketFactory = generateSSLContextFromPEMCertString(cert);
 199                 } else {
 200                     if (StringUtils.isNotBlank(config.getTrustCertPath())) {
 201                         logger.debug("generate SSLcontext from config cert path");
 202                         cert = readPEMCertificateStringFromFile(config.getTrustCertPath());
 203                         if (StringUtils.isNotBlank(cert)) {
 204                             sslSocketFactory = generateSSLContextFromPEMCertString(cert);
 205                         }
 206                     } else {
 207                         logger.debug("generate SSLcontext from server");
 208                         cert = getPEMCertificateFromServer(this.uri);
 209                         sslSocketFactory = generateSSLContextFromPEMCertString(cert);
 210                         if (sslSocketFactory != null) {
 211                             config.setCert(cert);
 212                         }
 213                     }
 214                 }
 215             } else {
 216                 logger.debug("generate SSLcontext from server");
 217                 cert = getPEMCertificateFromServer(this.uri);
 218                 sslSocketFactory = generateSSLContextFromPEMCertString(cert);
 219             }
 220         }
 221     }
 222
 223     private String fixURI(String uri) {
 224         String fixedURI = uri;
 225         if (!fixedURI.startsWith("https://")) {
 226             fixedURI = "https://" + fixedURI;
 227         }
 228         if (fixedURI.split(":").length != 3) {
 229             fixedURI = fixedURI + ":8080";
 230         }
 231         return fixedURI;
 232     }
 233
 234     private String fixRequest(String request) {
 235         return request.replace(" ", "");
 236     }
 237
 238     @Override
 239     public String execute(String request) {
 240         return execute(request, this.connectTimeout, this.readTimeout);
 241     }
 242
 243     private short loginCounter = 0;
 244
 245     @Override
 246     public String execute(String request, int connectTimeout, int readTimeout) {
 247         // NOTE: We will only show exceptions in the debug level, because they will be handled in the checkConnection()
 248         // method and this changes the bridge state. If a command was send it fails than and a sensorJob will be
 249         // execute the next time, by TimeOutExceptions. By other exceptions the checkConnection() method handles it in
 250         // max 1 second.
 251         String response = null;
 252         HttpsURLConnection connection = null;
 253         try {
 254             String correctedRequest = checkSessionToken(request);
 255             connection = getConnection(correctedRequest, connectTimeout, readTimeout);
 256             if (connection != null) {
 257                 connection.connect();
 258                 final int responseCode = connection.getResponseCode();
 259                 if (responseCode != HttpURLConnection.HTTP_FORBIDDEN) {
 260                     if (responseCode == HttpURLConnection.HTTP_INTERNAL_ERROR) {
 261                         response = new String(connection.getErrorStream().readAllBytes(), StandardCharsets.UTF_8);
 262                     } else {
 263                         response = new String(connection.getInputStream().readAllBytes(), StandardCharsets.UTF_8);
 264                     }
 265                     if (response != null) {
 266                         if (!response.contains("Authentication failed")) {
 267                             if (loginCounter > 0) {
 268                                 connectionManager.checkConnection(responseCode);
 269                             }
 270                             loginCounter = 0;
 271                         } else {
 272                             connectionManager.checkConnection(ConnectionManager.AUTHENTIFICATION_PROBLEM);
 273                             loginCounter++;
 274                         }
 275                     }
 276
 277                 }
 278                 connection.disconnect();
 279                 if (response == null && connectionManager != null
 280                         && loginCounter <= MAY_A_NEW_SESSION_TOKEN_IS_NEEDED) {
 281                     if (responseCode == HttpURLConnection.HTTP_FORBIDDEN) {
 282                         execute(addSessionToken(correctedRequest, connectionManager.getNewSessionToken()),
 283                                 connectTimeout, readTimeout);
 284                         loginCounter++;
 285                     } else {
 286                         connectionManager.checkConnection(responseCode);
 287                         loginCounter++;
 288                         return null;
 289                     }
 290                 }
 291                 return response;
 292             }
 293         } catch (SocketTimeoutException e) {
 294             informConnectionManager(ConnectionManager.SOCKET_TIMEOUT_EXCEPTION);
 295         } catch (java.net.ConnectException e) {
 296             informConnectionManager(ConnectionManager.CONNECTION_EXCEPTION);
 297         } catch (MalformedURLException e) {
 298             informConnectionManager(ConnectionManager.MALFORMED_URL_EXCEPTION);
 299         } catch (java.net.UnknownHostException e) {
 300             informConnectionManager(ConnectionManager.UNKNOWN_HOST_EXCEPTION);
 301         } catch (SSLHandshakeException e) {
 302             informConnectionManager(ConnectionManager.SSL_HANDSHAKE_EXCEPTION);
 303         } catch (IOException e) {
 304             logger.error("An IOException occurred: ", e);
 305             informConnectionManager(ConnectionManager.GENERAL_EXCEPTION);
 306         } finally {
 307             if (connection != null) {
 308                 connection.disconnect();
 309             }
 310         }
 311         return null;
 312     }
 313
 314     private boolean informConnectionManager(int code) {
 315         if (connectionManager != null && loginCounter < MAY_A_NEW_SESSION_TOKEN_IS_NEEDED) {
 316             connectionManager.checkConnection(code);
 317             return true;
 318         }
 319         return false;
 320     }
 321
 322     private String checkSessionToken(String request) {
 323         if (checkNeededSessionToken(request)) {
 324             if (connectionManager != null) {
 325                 String sessionToken = connectionManager.getSessionToken();
 326                 if (sessionToken == null) {
 327                     return addSessionToken(request, connectionManager.getNewSessionToken());
 328                 }
 329                 return addSessionToken(request, sessionToken);
 330             }
 331         }
 332         return request;
 333     }
 334
 335     private boolean checkNeededSessionToken(String request) {
 336         String functionName = StringUtils.substringAfterLast(StringUtils.substringBefore(request, "?"), "/");
 337         return !DsAPIImpl.METHODS_MUST_NOT_BE_LOGGED_IN.contains(functionName);
 338     }
 339
 340     private String addSessionToken(String request, String sessionToken) {
 341         String correctedRequest = request;
 342         if (!correctedRequest.contains(ParameterKeys.TOKEN)) {
 343             if (correctedRequest.contains("?")) {
 344                 correctedRequest = correctedRequest + "&" + ParameterKeys.TOKEN + "=" + sessionToken;
 345             } else {
 346                 correctedRequest = correctedRequest + "?" + ParameterKeys.TOKEN + "=" + sessionToken;
 347             }
 348         } else {
 349             correctedRequest = StringUtils.replaceOnce(correctedRequest, StringUtils.substringBefore(
 350                     StringUtils.substringAfter(correctedRequest, ParameterKeys.TOKEN + "="), "&"), sessionToken);
 351
 352         }
 353         return correctedRequest;
 354     }
 355
 356     private HttpsURLConnection getConnection(String request, int connectTimeout, int readTimeout) throws IOException {
 357         String correctedRequest = request;
 358         if (StringUtils.isNotBlank(correctedRequest)) {
 359             correctedRequest = fixRequest(correctedRequest);
 360             URL url = new URL(this.uri + correctedRequest);
 361             HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();
 362             if (connection != null) {
 363                 connection.setConnectTimeout(connectTimeout);
 364                 connection.setReadTimeout(readTimeout);
 365                 if (sslSocketFactory != null) {
 366                     connection.setSSLSocketFactory(sslSocketFactory);
 367                 }
 368                 if (hostnameVerifier != null) {
 369                     connection.setHostnameVerifier(hostnameVerifier);
 370                 }
 371             }
 372             return connection;
 373         }
 374         return null;
 375     }
 376
 377     @Override
 378     public int checkConnection(String testRequest) {
 379         try {
 380             HttpsURLConnection connection = getConnection(testRequest, connectTimeout, readTimeout);
 381             if (connection != null) {
 382                 connection.connect();
 383                 if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {
 384                     if (new String(connection.getInputStream().readAllBytes(), StandardCharsets.UTF_8)
 385                             .contains("Authentication failed")) {
 386                         return ConnectionManager.AUTHENTIFICATION_PROBLEM;
 387                     }
 388                 }
 389                 connection.disconnect();
 390                 return connection.getResponseCode();
 391             } else {
 392                 return ConnectionManager.GENERAL_EXCEPTION;
 393             }
 394         } catch (SocketTimeoutException e) {
 395             return ConnectionManager.SOCKET_TIMEOUT_EXCEPTION;
 396         } catch (java.net.ConnectException e) {
 397             return ConnectionManager.CONNECTION_EXCEPTION;
 398         } catch (MalformedURLException e) {
 399             return ConnectionManager.MALFORMED_URL_EXCEPTION;
 400         } catch (java.net.UnknownHostException e) {
 401             return ConnectionManager.UNKNOWN_HOST_EXCEPTION;
 402         } catch (IOException e) {
 403             return ConnectionManager.GENERAL_EXCEPTION;
 404         }
 405     }
 406
 407     @Override
 408     public int getSensordataConnectionTimeout() {
 409         return config != null ? config.getSensordataConnectionTimeout() : Config.DEFAULT_SENSORDATA_CONNECTION_TIMEOUT;
 410     }
 411
 412     @Override
 413     public int getSensordataReadTimeout() {
 414         return config != null ? config.getSensordataReadTimeout() : Config.DEFAULT_SENSORDATA_READ_TIMEOUT;
 415     }
 416
 417     private String readPEMCertificateStringFromFile(String path) {
 418         if (StringUtils.isBlank(path)) {
 419             logger.error("Path is empty.");
 420         } else {
 421             File dssCert = new File(path);
 422             if (dssCert.exists()) {
 423                 if (path.endsWith(".crt")) {
 424                     try (InputStream certInputStream = new FileInputStream(dssCert)) {
 425                         String cert = new String(certInputStream.readAllBytes(), StandardCharsets.UTF_8);
 426                         if (cert.startsWith(BEGIN_CERT)) {
 427                             return cert;
 428                         } else {
 429                             logger.error("File is not a PEM certificate file. PEM-Certificates starts with: {}",
 430                                     BEGIN_CERT);
 431                         }
 432                     } catch (FileNotFoundException e) {
 433                         logger.error("Can't find a certificate file at the path: {}\nPlease check the path!", path);
 434                     } catch (IOException e) {
 435                         logger.error("An IOException occurred: ", e);
 436                     }
 437                 } else {
 438                     logger.error("File is not a certificate (.crt) file.");
 439                 }
 440             } else {
 441                 logger.error("File not found");
 442             }
 443         }
 444         return null;
 445     }
 446
 447     @Override
 448     public String writePEMCertFile(String path) {
 449         String correctedPath = StringUtils.trimToEmpty(path);
 450         File certFilePath;
 451         if (StringUtils.isNotBlank(correctedPath)) {
 452             certFilePath = new File(correctedPath);
 453             boolean pathExists = certFilePath.exists();
 454             if (!pathExists) {
 455                 pathExists = certFilePath.mkdirs();
 456             }
 457             if (pathExists && !correctedPath.endsWith("/")) {
 458                 correctedPath = correctedPath + "/";
 459             }
 460         }
 461         InputStream certInputStream = IOUtils.toInputStream(cert);
 462         X509Certificate trustedCert;
 463         try {
 464             trustedCert = (X509Certificate) CertificateFactory.getInstance("X.509")
 465                     .generateCertificate(certInputStream);
 466
 467             certFilePath = new File(
 468                     correctedPath + trustedCert.getSubjectDN().getName().split(",")[0].substring(2) + ".crt");
 469             if (!certFilePath.exists()) {
 470                 certFilePath.createNewFile();
 471                 FileWriter writer = new FileWriter(certFilePath, true);
 472                 writer.write(cert);
 473                 writer.flush();
 474                 writer.close();
 475                 return certFilePath.getAbsolutePath();
 476             } else {
 477                 logger.error("File allready exists!");
 478             }
 479         } catch (IOException e) {
 480             logger.error("An IOException occurred: ", e);
 481         } catch (CertificateException e1) {
 482             logger.error("A CertificateException occurred: ", e1);
 483         }
 484         return null;
 485     }
 486
 487     private SSLSocketFactory generateSSLContextFromPEMCertString(String pemCert) {
 488         if (StringUtils.isNotBlank(pemCert) && pemCert.startsWith(BEGIN_CERT)) {
 489             try {
 490                 InputStream certInputStream = IOUtils.toInputStream(pemCert);
 491                 final X509Certificate trustedCert = (X509Certificate) CertificateFactory.getInstance("X.509")
 492                         .generateCertificate(certInputStream);
 493
 494                 final TrustManager[] trustManager = new TrustManager[] { new X509TrustManager() {
 495
 496                     @Override
 497                     public java.security.cert.X509Certificate[] getAcceptedIssuers() {
 498                         return null;
 499                     }
 500
 501                     @Override
 502                     public void checkClientTrusted(java.security.cert.X509Certificate[] certs, String authType)
 503                             throws CertificateException {
 504                         if (!certs[0].equals(trustedCert)) {
 505                             throw new CertificateException();
 506                         }
 507                     }
 508
 509                     @Override
 510                     public void checkServerTrusted(java.security.cert.X509Certificate[] certs, String authType)
 511                             throws CertificateException {
 512                         if (!certs[0].equals(trustedCert)) {
 513                             throw new CertificateException();
 514                         }
 515                     }
 516                 } };
 517
 518                 SSLContext sslContext = SSLContext.getInstance("SSL");
 519                 sslContext.init(null, trustManager, new java.security.SecureRandom());
 520                 return sslContext.getSocketFactory();
 521             } catch (NoSuchAlgorithmException e) {
 522                 logger.error("A NoSuchAlgorithmException occurred: ", e);
 523             } catch (KeyManagementException e) {
 524                 logger.error("A KeyManagementException occurred: ", e);
 525             } catch (CertificateException e) {
 526                 logger.error("A CertificateException occurred: ", e);
 527             }
 528         } else {
 529             logger.error("Cert is empty");
 530         }
 531         return null;
 532     }
 533
 534     private String getPEMCertificateFromServer(String host) {
 535         HttpsURLConnection connection = null;
 536         try {
 537             URL url = new URL(host);
 538
 539             connection = (HttpsURLConnection) url.openConnection();
 540             connection.setHostnameVerifier(hostnameVerifier);
 541             connection.setSSLSocketFactory(generateSSLContextWhichAcceptAllSSLCertificats());
 542             connection.connect();
 543
 544             java.security.cert.Certificate[] cert = connection.getServerCertificates();
 545             connection.disconnect();
 546
 547             byte[] by = ((X509Certificate) cert[0]).getEncoded();
 548             if (by.length != 0) {
 549                 return BEGIN_CERT + Base64.getEncoder().encodeToString(by) + END_CERT;
 550             }
 551         } catch (MalformedURLException e) {
 552             if (!informConnectionManager(ConnectionManager.MALFORMED_URL_EXCEPTION)) {
 553                 logger.error("A MalformedURLException occurred: ", e);
 554             }
 555         } catch (IOException e) {
 556             short code = ConnectionManager.GENERAL_EXCEPTION;
 557             if (e instanceof java.net.ConnectException) {
 558                 code = ConnectionManager.CONNECTION_EXCEPTION;
 559             } else if (e instanceof java.net.UnknownHostException) {
 560                 code = ConnectionManager.UNKNOWN_HOST_EXCEPTION;
 561             }
 562             if (!informConnectionManager(code) || code == -1) {
 563                 logger.error("An IOException occurred: ", e);
 564             }
 565         } catch (CertificateEncodingException e) {
 566             logger.error("A CertificateEncodingException occurred: ", e);
 567         } finally {
 568             if (connection != null) {
 569                 connection.disconnect();
 570             }
 571         }
 572         return null;
 573     }
 574
 575     private SSLSocketFactory generateSSLContextWhichAcceptAllSSLCertificats() {
 576         Security.addProvider(Security.getProvider("SunJCE"));
 577         TrustManager[] trustAllCerts = new TrustManager[] { new X509TrustManager() {
 578
 579             @Override
 580             public java.security.cert.X509Certificate[] getAcceptedIssuers() {
 581                 return null;
 582             }
 583
 584             @Override
 585             public void checkClientTrusted(X509Certificate[] arg0, String arg1) throws CertificateException {
 586             }
 587
 588             @Override
 589             public void checkServerTrusted(X509Certificate[] arg0, String arg1) throws CertificateException {
 590             }
 591         } };
 592
 593         try {
 594             SSLContext sslContext = SSLContext.getInstance("SSL");
 595
 596             sslContext.init(null, trustAllCerts, new SecureRandom());
 597
 598             return sslContext.getSocketFactory();
 599         } catch (KeyManagementException e) {
 600             logger.error("A KeyManagementException occurred", e);
 601         } catch (NoSuchAlgorithmException e) {
 602             logger.error("A NoSuchAlgorithmException occurred", e);
 603         }
 604         return null;
 605     }
 606 }