title: Java SSL Exception, protocol_version when trying to use HttpClient to log into a website
body: <p>I have a Java program that I am trying to get to talk to a website that uses an HTTPS connection with TLSv1. (Checked with FireFox.) </p>
  
  <p>The problem is that I still get a protocol_version exception. Here is the stack trace:</p>
  
  <pre><code>    javax.net.ssl.SSLException: Received fatal alert: protocol_version
  2015-07-28 14:48:38 [INFO ] 
      at sun.security.ssl.Alerts.getSSLException(Alerts.java:208)
      at sun.security.ssl.Alerts.getSSLException(Alerts.java:154)
      at sun.security.ssl.SSLSocketImpl.recvAlert(SSLSocketImpl.java:2023)
      at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1125)
      at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375)
      at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403)
      at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387)
      at org.apache.http.conn.ssl.SSLConnectionSocketFactory.createLayeredSocket(SSLConnectionSocketFactory.java:290)
      at org.apache.http.conn.ssl.SSLConnectionSocketFactory.connectSocket(SSLConnectionSocketFactory.java:259)
      at org.apache.http.impl.conn.HttpClientConnectionOperator.connect(HttpClientConnectionOperator.java:125)
      at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:319)
      at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:363)
      at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:219)
      at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:195)
      at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:86)
      at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:108)
      at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184)
      at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
      at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:106)
      at org.openhab.binding.honeywellwifithermostat.handler.honeywellWifiThermostatHandler.getHoneywellWebsiteAuthCookie(honeywellWifiThermostatHandler.java:91)
      at org.openhab.binding.honeywellwifithermostat.handler.honeywellWifiThermostatHandler.initialize(honeywellWifiThermostatHandler.java:73)
      at org.eclipse.smarthome.core.thing.binding.BaseThingHandlerFactory.registerHandler(BaseThingHandlerFactory.java:116)
      at org.eclipse.smarthome.core.thing.internal.ThingManager$6.call(ThingManager.java:480)
      at org.eclipse.smarthome.core.thing.internal.ThingManager$6.call(ThingManager.java:1)
      at java.util.concurrent.FutureTask.run(FutureTask.java:266)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
      at java.lang.Thread.run(Thread.java:745)
  </code></pre>
  
  <p>Here is the relevant Java source:</p>
  
  <pre><code>import java.io.IOException;
  import java.security.KeyManagementException;
  import java.security.NoSuchAlgorithmException;
  import java.util.ArrayList;
  import java.util.List;
  
  import javax.net.ssl.SSLContext;
  
  import org.apache.http.NameValuePair;
  import org.apache.http.client.entity.UrlEncodedFormEntity;
  import org.apache.http.client.methods.CloseableHttpResponse;
  import org.apache.http.client.methods.HttpPost;
  import org.apache.http.conn.ssl.SSLContexts;
  import org.apache.http.impl.client.CloseableHttpClient;
  import org.apache.http.impl.client.HttpClientBuilder;
  import org.apache.http.message.BasicNameValuePair;
  import org.eclipse.smarthome.config.core.Configuration;
  import org.eclipse.smarthome.core.thing.ChannelUID;
  import org.eclipse.smarthome.core.thing.Thing;
  import org.eclipse.smarthome.core.thing.binding.BaseThingHandler;
  import org.eclipse.smarthome.core.types.Command;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * The {@link honeywellWifiThermostatHandler} is responsible for handling commands, which are
   * sent to one of the channels.
   *
   * @author  - Initial contribution
   */
  public class honeywellWifiThermostatHandler extends BaseThingHandler {
  
      private Logger logger = LoggerFactory.getLogger(honeywellWifiThermostatHandler.class);
  
      private String userName = null;
      private String passWord = null;
  
      public honeywellWifiThermostatHandler(Thing thing) {
          super(thing);
      }
  
      @Override
      public void handleCommand(ChannelUID channelUID, Command command) {
          if (channelUID.getId().equals(CHANNEL_1)) {
              // TODO: handle command
          }
      }
  
      @Override
      public void initialize() {
          // TODO Auto-generated method stub
          Configuration conf = this.getConfig();
  
          if (conf.get("userName") != null) {
              userName = String.valueOf(conf.get("userName"));
          }
          if (conf.get("passWord") != null) {
              passWord = String.valueOf(conf.get("passWord"));
          }
  
          logger.debug("Attempting to get auth cookie for Honeywell site.");
          getHoneywellWebsiteAuthCookie(userName, passWord);
  
          super.initialize();
      }
  
      public void getHoneywellWebsiteAuthCookie(String userName, String passWord) {
  
          CloseableHttpClient httpclient;
          try {
              SSLContext ctx = SSLContexts.custom().useProtocol("TLSv1").build();
              httpclient = HttpClientBuilder.create().setSslcontext(ctx).build();
  
              HttpPost httpPost = new HttpPost("https://www.mytotalconnectcomfort.com/portal/");
              List&lt;NameValuePair&gt; fields = new ArrayList&lt;NameValuePair&gt;();
              fields.add(new BasicNameValuePair("UserName", userName));
              fields.add(new BasicNameValuePair("Password", passWord));
  
              httpPost.setEntity(new UrlEncodedFormEntity(fields));
              CloseableHttpResponse resp = httpclient.execute(httpPost);
  
              logger.debug("Status line: {}", resp.getStatusLine());
          } catch (IOException | NoSuchAlgorithmException | KeyManagementException e) {
              // TODO Auto-generated catch block
              e.printStackTrace();
          }
      }
  
  }
  </code></pre>
  
  <p>Any ideas out there? Even an idea of how I could trace this down?</p>
  
  <p><strong>UPDATE</strong></p>
  
  <p>I got the debug information from the Java VM. It gives a bunch of errors about unsupported cipher suites, then maybe tries to fallback to SSLv3? I'm not too strong with crypto stuff. Again, any help is much appreciated.</p>
  
  <pre><code>-------------------------  NET DEBUG CRAP ---------------------------
  trustStore is: /usr/lib/jvm/java-8-openjdk/jre/lib/security/cacerts
  trustStore type is : jks
  trustStore provider is : 
  init truststore
  
  == REMOVED ADDING TRUSTED ROOT CERT MESSAGES ==
  
  trigger seeding of SecureRandom
  done seeding SecureRandom
  Ignoring unsupported cipher suite: TLS_DHE_DSS_WITH_AES_256_GCM_SHA384
  Ignoring unsupported cipher suite: TLS_DHE_DSS_WITH_AES_128_CBC_SHA256
  Ignoring unsupported cipher suite: TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
  Ignoring unsupported cipher suite: TLS_DHE_DSS_WITH_AES_128_GCM_SHA256
  Ignoring unsupported cipher suite: TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
  Ignoring unsupported cipher suite: TLS_DHE_RSA_WITH_AES_128_GCM_SHA256
  Ignoring unsupported cipher suite: TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
  Ignoring unsupported cipher suite: TLS_RSA_WITH_AES_256_CBC_SHA256
  Ignoring unsupported cipher suite: TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
  Ignoring unsupported cipher suite: TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256
  Ignoring unsupported cipher suite: TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384
  Ignoring unsupported cipher suite: TLS_RSA_WITH_AES_128_CBC_SHA256
  Ignoring unsupported cipher suite: TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384
  Ignoring unsupported cipher suite: TLS_RSA_WITH_AES_128_GCM_SHA256
  Ignoring unsupported cipher suite: TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256
  Ignoring unsupported cipher suite: TLS_RSA_WITH_AES_256_GCM_SHA384
  Ignoring unsupported cipher suite: TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384
  Ignoring unsupported cipher suite: TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256
  Ignoring unsupported cipher suite: TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
  Ignoring unsupported cipher suite: TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
  Ignoring unsupported cipher suite: TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384
  Ignoring unsupported cipher suite: TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256
  Ignoring unsupported cipher suite: TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
  Ignoring unsupported cipher suite: TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
  Ignoring unsupported cipher suite: TLS_DHE_DSS_WITH_AES_256_CBC_SHA256
  Ignoring unsupported cipher suite: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
  Ignoring unsupported cipher suite: TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
  Ignoring unsupported cipher suite: TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
  Allow unsafe renegotiation: false
  Allow legacy hello messages: true
  Is initial handshake: true
  Is secure renegotiation: false
  %% No cached client session
  *** ClientHello, TLSv1.2
  RandomCookie:  GMT: 1421269547 bytes = { 179, 68, 198, 137, 7, 197, 13, 106, 3, 187, 99, 160, 117, 164, 48, 226, 113, 136, 166, 199, 101, 82, 195, 192, 46, 52, 140, 181 }
  Session ID:  {}
  Cipher Suites: [TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, TLS_RSA_WITH_AES_256_CBC_SHA, TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA, TLS_ECDH_RSA_WITH_AES_256_CBC_SHA, TLS_DHE_RSA_WITH_AES_256_CBC_SHA, TLS_DHE_DSS_WITH_AES_256_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_128_CBC_SHA, TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_DSS_WITH_AES_128_CBC_SHA, TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_RSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA, TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
  Compression Methods:  { 0 }
  Extension elliptic_curves, curve names: {secp256r1, sect163k1, sect163r2, secp192r1, secp224r1, sect233k1, sect233r1, sect283k1, sect283r1, secp384r1, sect409k1, sect409r1, secp521r1, sect571k1, sect571r1, secp160k1, secp160r1, secp160r2, sect163r1, secp192k1, sect193r1, sect193r2, secp224k1, sect239k1, secp256k1}
  Extension ec_point_formats, formats: [uncompressed]
  Extension signature_algorithms, signature_algorithms: SHA512withECDSA, SHA512withRSA, SHA384withECDSA, SHA384withRSA, SHA256withECDSA, SHA256withRSA, SHA224withECDSA, SHA224withRSA, SHA1withECDSA, SHA1withRSA, SHA1withDSA, MD5withRSA
  Extension server_name, server_name: [type=host_name (0), value=www.mytotalconnectcomfort.com]
  ***
  [write] MD5 and SHA1 hashes:  len = 219
  0000: 01 00 00 D7 03 03 55 B7   DA 2B B3 44 C6 89 07 C5  ......U..+.D....
  0010: 0D 6A 03 BB 63 A0 75 A4   30 E2 71 88 A6 C7 65 52  .j..c.u.0.q...eR
  0020: C3 C0 2E 34 8C B5 00 00   2C C0 0A C0 14 00 35 C0  ...4....,.....5.
  0030: 05 C0 0F 00 39 00 38 C0   09 C0 13 00 2F C0 04 C0  ....9.8...../...
  0040: 0E 00 33 00 32 C0 08 C0   12 00 0A C0 03 C0 0D 00  ..3.2...........
  0050: 16 00 13 00 FF 01 00 00   82 00 0A 00 34 00 32 00  ............4.2.
  0060: 17 00 01 00 03 00 13 00   15 00 06 00 07 00 09 00  ................
  0070: 0A 00 18 00 0B 00 0C 00   19 00 0D 00 0E 00 0F 00  ................
  0080: 10 00 11 00 02 00 12 00   04 00 05 00 14 00 08 00  ................
  0090: 16 00 0B 00 02 01 00 00   0D 00 1A 00 18 06 03 06  ................
  00A0: 01 05 03 05 01 04 03 04   01 03 03 03 01 02 03 02  ................
  00B0: 01 02 02 01 01 00 00 00   22 00 20 00 00 1D 77 77  ........". ...ww
  00C0: 77 2E 6D 79 74 6F 74 61   6C 63 6F 6E 6E 65 63 74  w.mytotalconnect
  00D0: 63 6F 6D 66 6F 72 74 2E   63 6F 6D                 comfort.com
  ESH-safeCall-2, WRITE: TLSv1.2 Handshake, length = 219
  [Raw write]: length = 224
  0000: 16 03 03 00 DB 01 00 00   D7 03 03 55 B7 DA 2B B3  ...........U..+.
  0010: 44 C6 89 07 C5 0D 6A 03   BB 63 A0 75 A4 30 E2 71  D.....j..c.u.0.q
  0020: 88 A6 C7 65 52 C3 C0 2E   34 8C B5 00 00 2C C0 0A  ...eR...4....,..
  0030: C0 14 00 35 C0 05 C0 0F   00 39 00 38 C0 09 C0 13  ...5.....9.8....
  0040: 00 2F C0 04 C0 0E 00 33   00 32 C0 08 C0 12 00 0A  ./.....3.2......
  0050: C0 03 C0 0D 00 16 00 13   00 FF 01 00 00 82 00 0A  ................
  0060: 00 34 00 32 00 17 00 01   00 03 00 13 00 15 00 06  .4.2............
  0070: 00 07 00 09 00 0A 00 18   00 0B 00 0C 00 19 00 0D  ................
  0080: 00 0E 00 0F 00 10 00 11   00 02 00 12 00 04 00 05  ................
  0090: 00 14 00 08 00 16 00 0B   00 02 01 00 00 0D 00 1A  ................
  00A0: 00 18 06 03 06 01 05 03   05 01 04 03 04 01 03 03  ................
  00B0: 03 01 02 03 02 01 02 02   01 01 00 00 00 22 00 20  .............". 
  00C0: 00 00 1D 77 77 77 2E 6D   79 74 6F 74 61 6C 63 6F  ...www.mytotalco
  00D0: 6E 6E 65 63 74 63 6F 6D   66 6F 72 74 2E 63 6F 6D  nnectcomfort.com
  [Raw read]: length = 5
  0000: 15 03 00 00 02                                     .....
  [Raw read]: length = 2
  0000: 02 46                                              .F
  ESH-safeCall-2, READ: SSLv3 Alert, length = 2
  ESH-safeCall-2, RECV TLSv1.2 ALERT:  fatal, protocol_version
  ESH-safeCall-2, called closeSocket()
  ESH-safeCall-2, handling exception: javax.net.ssl.SSLException: Received fatal alert: protocol_version
  </code></pre>