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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.bmwconnecteddrive.internal.handler;
  14
  15 import static org.openhab.binding.bmwconnecteddrive.internal.utils.HTTPConstants.*;
  16
  17 import java.io.BufferedReader;
  18 import java.io.IOException;
  19 import java.io.InputStreamReader;
  20 import java.io.OutputStream;
  21 import java.net.HttpURLConnection;
  22 import java.net.URL;
  23 import java.net.URLDecoder;
  24 import java.nio.charset.Charset;
  25 import java.nio.charset.StandardCharsets;
  26 import java.util.Optional;
  27 import java.util.concurrent.ExecutionException;
  28 import java.util.concurrent.TimeUnit;
  29 import java.util.concurrent.TimeoutException;
  30
  31 import org.eclipse.jdt.annotation.NonNullByDefault;
  32 import org.eclipse.jdt.annotation.Nullable;
  33 import org.eclipse.jetty.client.HttpClient;
  34 import org.eclipse.jetty.client.api.ContentResponse;
  35 import org.eclipse.jetty.client.api.Request;
  36 import org.eclipse.jetty.client.api.Result;
  37 import org.eclipse.jetty.client.util.BufferingResponseListener;
  38 import org.eclipse.jetty.client.util.StringContentProvider;
  39 import org.eclipse.jetty.http.HttpHeader;
  40 import org.eclipse.jetty.util.MultiMap;
  41 import org.eclipse.jetty.util.UrlEncoded;
  42 import org.openhab.binding.bmwconnecteddrive.internal.ConnectedDriveConfiguration;
  43 import org.openhab.binding.bmwconnecteddrive.internal.VehicleConfiguration;
  44 import org.openhab.binding.bmwconnecteddrive.internal.dto.NetworkError;
  45 import org.openhab.binding.bmwconnecteddrive.internal.dto.auth.AuthResponse;
  46 import org.openhab.binding.bmwconnecteddrive.internal.handler.simulation.Injector;
  47 import org.openhab.binding.bmwconnecteddrive.internal.utils.BimmerConstants;
  48 import org.openhab.binding.bmwconnecteddrive.internal.utils.Constants;
  49 import org.openhab.binding.bmwconnecteddrive.internal.utils.Converter;
  50 import org.openhab.binding.bmwconnecteddrive.internal.utils.ImageProperties;
  51 import org.openhab.core.io.net.http.HttpClientFactory;
  52 import org.slf4j.Logger;
  53 import org.slf4j.LoggerFactory;
  54
  55 /**
  56  * The {@link ConnectedDriveProxy} This class holds the important constants for the BMW Connected Drive Authorization.
  57  * They
  58  * are taken from the Bimmercode from github {@link https://github.com/bimmerconnected/bimmer_connected}
  59  * File defining these constants
  60  * {@link https://github.com/bimmerconnected/bimmer_connected/blob/master/bimmer_connected/account.py}
  61  * https://customer.bmwgroup.com/one/app/oauth.js
  62  *
  63  * @author Bernd Weymann - Initial contribution
  64  * @author Norbert Truchsess - edit & send of charge profile
  65  */
  66 @NonNullByDefault
  67 public class ConnectedDriveProxy {
  68     private final Logger logger = LoggerFactory.getLogger(ConnectedDriveProxy.class);
  69     private Optional<RemoteServiceHandler> remoteServiceHandler = Optional.empty();
  70     private final Token token = new Token();
  71     private final HttpClient httpClient;
  72     private final HttpClient authHttpClient;
  73     private final ConnectedDriveConfiguration configuration;
  74
  75     /**
  76      * URLs taken from https://github.com/bimmerconnected/bimmer_connected/blob/master/bimmer_connected/const.py
  77      */
  78     final String baseUrl;
  79     final String vehicleUrl;
  80     final String legacyUrl;
  81     final String remoteCommandUrl;
  82     final String remoteStatusUrl;
  83     final String navigationAPIUrl;
  84     final String vehicleStatusAPI = "/status";
  85     final String lastTripAPI = "/statistics/lastTrip";
  86     final String allTripsAPI = "/statistics/allTrips";
  87     final String chargeAPI = "/chargingprofile";
  88     final String destinationAPI = "/destinations";
  89     final String imageAPI = "/image";
  90     final String rangeMapAPI = "/rangemap";
  91     final String serviceExecutionAPI = "/executeService";
  92     final String serviceExecutionStateAPI = "/serviceExecutionStatus";
  93     public static final String REMOTE_SERVICE_EADRAX_BASE_URL = "/eadrax-vrccs/v2/presentation/remote-commands/"; // '/{vin}/{service_type}'
  94     final String remoteServiceEADRXstatusUrl = REMOTE_SERVICE_EADRAX_BASE_URL + "eventStatus?eventId={event_id}";
  95     final String vehicleEADRXPoiUrl = "/eadrax-dcs/v1/send-to-car/send-to-car";
  96
  97     public ConnectedDriveProxy(HttpClientFactory httpClientFactory, ConnectedDriveConfiguration config) {
  98         httpClient = httpClientFactory.getCommonHttpClient();
  99         authHttpClient = httpClientFactory.createHttpClient(AUTH_HTTP_CLIENT_NAME);
 100         configuration = config;
 101
 102         vehicleUrl = "https://" + BimmerConstants.API_SERVER_MAP.get(configuration.region) + "/webapi/v1/user/vehicles";
 103         baseUrl = vehicleUrl + "/";
 104         legacyUrl = "https://" + BimmerConstants.API_SERVER_MAP.get(configuration.region) + "/api/vehicle/dynamic/v1/";
 105         navigationAPIUrl = "https://" + BimmerConstants.API_SERVER_MAP.get(configuration.region)
 106                 + "/api/vehicle/navigation/v1/";
 107         remoteCommandUrl = "https://" + BimmerConstants.EADRAX_SERVER_MAP.get(configuration.region)
 108                 + REMOTE_SERVICE_EADRAX_BASE_URL;
 109         remoteStatusUrl = remoteCommandUrl + "eventStatus";
 110     }
 111
 112     public synchronized void call(final String url, final boolean post, final @Nullable String encoding,
 113             final @Nullable String params, final ResponseCallback callback) {
 114         // only executed in "simulation mode"
 115         // SimulationTest.testSimulationOff() assures Injector is off when releasing
 116         if (Injector.isActive()) {
 117             if (url.equals(baseUrl)) {
 118                 ((StringResponseCallback) callback).onResponse(Injector.getDiscovery());
 119             } else if (url.endsWith(vehicleStatusAPI)) {
 120                 ((StringResponseCallback) callback).onResponse(Injector.getStatus());
 121             } else {
 122                 logger.debug("Simulation of {} not supported", url);
 123             }
 124             return;
 125         }
 126         final Request req;
 127         final String completeUrl;
 128
 129         if (post) {
 130             completeUrl = url;
 131             req = httpClient.POST(url);
 132             if (encoding != null) {
 133                 if (CONTENT_TYPE_URL_ENCODED.equals(encoding)) {
 134                     req.content(new StringContentProvider(CONTENT_TYPE_URL_ENCODED, params, StandardCharsets.UTF_8));
 135                 } else if (CONTENT_TYPE_JSON_ENCODED.equals(encoding)) {
 136                     req.header(HttpHeader.CONTENT_TYPE, encoding);
 137                     req.content(new StringContentProvider(CONTENT_TYPE_JSON_ENCODED, params, StandardCharsets.UTF_8));
 138                 }
 139             }
 140         } else {
 141             completeUrl = params == null ? url : url + Constants.QUESTION + params;
 142             req = httpClient.newRequest(completeUrl);
 143         }
 144         req.header(HttpHeader.AUTHORIZATION, getToken().getBearerToken());
 145         req.header(HttpHeader.REFERER, BimmerConstants.LEGACY_REFERER_URL);
 146
 147         req.timeout(HTTP_TIMEOUT_SEC, TimeUnit.SECONDS).send(new BufferingResponseListener() {
 148             @NonNullByDefault({})
 149             @Override
 150             public void onComplete(Result result) {
 151                 if (result.getResponse().getStatus() != 200) {
 152                     NetworkError error = new NetworkError();
 153                     error.url = completeUrl;
 154                     error.status = result.getResponse().getStatus();
 155                     if (result.getResponse().getReason() != null) {
 156                         error.reason = result.getResponse().getReason();
 157                     } else {
 158                         error.reason = result.getFailure().getMessage();
 159                     }
 160                     error.params = result.getRequest().getParams().toString();
 161                     logger.debug("HTTP Error {}", error.toString());
 162                     callback.onError(error);
 163                 } else {
 164                     if (callback instanceof StringResponseCallback) {
 165                         ((StringResponseCallback) callback).onResponse(getContentAsString());
 166                     } else if (callback instanceof ByteResponseCallback) {
 167                         ((ByteResponseCallback) callback).onResponse(getContent());
 168                     } else {
 169                         logger.error("unexpected reponse type {}", callback.getClass().getName());
 170                     }
 171                 }
 172             }
 173         });
 174     }
 175
 176     public void get(String url, @Nullable String coding, @Nullable String params, ResponseCallback callback) {
 177         call(url, false, coding, params, callback);
 178     }
 179
 180     public void post(String url, @Nullable String coding, @Nullable String params, ResponseCallback callback) {
 181         call(url, true, coding, params, callback);
 182     }
 183
 184     public void requestVehicles(StringResponseCallback callback) {
 185         get(vehicleUrl, null, null, callback);
 186     }
 187
 188     public void requestVehcileStatus(VehicleConfiguration config, StringResponseCallback callback) {
 189         get(baseUrl + config.vin + vehicleStatusAPI, null, null, callback);
 190     }
 191
 192     public void requestLegacyVehcileStatus(VehicleConfiguration config, StringResponseCallback callback) {
 193         // see https://github.com/jupe76/bmwcdapi/search?q=dynamic%2Fv1
 194         get(legacyUrl + config.vin + "?offset=-60", null, null, callback);
 195     }
 196
 197     public void requestLNavigation(VehicleConfiguration config, StringResponseCallback callback) {
 198         // see https://github.com/jupe76/bmwcdapi/search?q=dynamic%2Fv1
 199         get(navigationAPIUrl + config.vin, null, null, callback);
 200     }
 201
 202     public void requestLastTrip(VehicleConfiguration config, StringResponseCallback callback) {
 203         get(baseUrl + config.vin + lastTripAPI, null, null, callback);
 204     }
 205
 206     public void requestAllTrips(VehicleConfiguration config, StringResponseCallback callback) {
 207         get(baseUrl + config.vin + allTripsAPI, null, null, callback);
 208     }
 209
 210     public void requestChargingProfile(VehicleConfiguration config, StringResponseCallback callback) {
 211         get(baseUrl + config.vin + chargeAPI, null, null, callback);
 212     }
 213
 214     public void requestDestinations(VehicleConfiguration config, StringResponseCallback callback) {
 215         get(baseUrl + config.vin + destinationAPI, null, null, callback);
 216     }
 217
 218     public void requestRangeMap(VehicleConfiguration config, @Nullable MultiMap<String> params,
 219             StringResponseCallback callback) {
 220         get(baseUrl + config.vin + rangeMapAPI, CONTENT_TYPE_URL_ENCODED,
 221                 UrlEncoded.encode(params, StandardCharsets.UTF_8, false), callback);
 222     }
 223
 224     public void requestImage(VehicleConfiguration config, ImageProperties props, ByteResponseCallback callback) {
 225         final String localImageUrl = baseUrl + config.vin + imageAPI;
 226         final MultiMap<String> dataMap = new MultiMap<String>();
 227         dataMap.add("width", Integer.toString(props.size));
 228         dataMap.add("height", Integer.toString(props.size));
 229         dataMap.add("view", props.viewport);
 230
 231         get(localImageUrl, CONTENT_TYPE_URL_ENCODED, UrlEncoded.encode(dataMap, StandardCharsets.UTF_8, false),
 232                 callback);
 233     }
 234
 235     RemoteServiceHandler getRemoteServiceHandler(VehicleHandler vehicleHandler) {
 236         remoteServiceHandler = Optional.of(new RemoteServiceHandler(vehicleHandler, this));
 237         return remoteServiceHandler.get();
 238     }
 239
 240     // Token handling
 241
 242     /**
 243      * Gets new token if old one is expired or invalid. In case of error the token remains.
 244      * So if token refresh fails the corresponding requests will also fail and update the
 245      * Thing status accordingly.
 246      *
 247      * @return token
 248      */
 249     public Token getToken() {
 250         if (!token.isValid()) {
 251             if (configuration.preferMyBmw) {
 252                 if (!updateToken()) {
 253                     if (!updateLegacyToken()) {
 254                         logger.debug("Authorization failed!");
 255                     }
 256                 }
 257             } else {
 258                 if (!updateLegacyToken()) {
 259                     if (!updateToken()) {
 260                         logger.debug("Authorization failed!");
 261                     }
 262                 }
 263             }
 264         }
 265         remoteServiceHandler.ifPresent(serviceHandler -> {
 266             serviceHandler.setMyBmwApiUsage(token.isMyBmwApiUsage());
 267         });
 268         return token;
 269     }
 270
 271     public synchronized boolean updateToken() {
 272         if (BimmerConstants.REGION_CHINA.equals(configuration.region)) {
 273             // region China currently not supported for MyBMW API
 274             logger.debug("Region {} not supported yet for MyBMW Login", BimmerConstants.REGION_CHINA);
 275             return false;
 276         }
 277         if (!startAuthClient()) {
 278             return false;
 279         } // else continue
 280         String authUri = "https://" + BimmerConstants.AUTH_SERVER_MAP.get(configuration.region)
 281                 + BimmerConstants.OAUTH_ENDPOINT;
 282
 283         Request authRequest = authHttpClient.POST(authUri);
 284         authRequest.header(HttpHeader.CONTENT_TYPE, CONTENT_TYPE_URL_ENCODED);
 285
 286         MultiMap<String> authChallenge = getTokenBaseValues();
 287         authChallenge.addAllValues(getTokenAuthValues());
 288         String authEncoded = UrlEncoded.encode(authChallenge, Charset.defaultCharset(), false);
 289         authRequest.content(new StringContentProvider(authEncoded));
 290         try {
 291             ContentResponse authResponse = authRequest.timeout(HTTP_TIMEOUT_SEC, TimeUnit.SECONDS).send();
 292             String authResponseString = URLDecoder.decode(authResponse.getContentAsString(), Charset.defaultCharset());
 293             String authCode = getAuthCode(authResponseString);
 294             if (!Constants.EMPTY.equals(authCode)) {
 295                 MultiMap<String> codeChallenge = getTokenBaseValues();
 296                 codeChallenge.put(AUTHORIZATION, authCode);
 297
 298                 Request codeRequest = authHttpClient.POST(authUri).followRedirects(false);
 299                 codeRequest.header(HttpHeader.CONTENT_TYPE, CONTENT_TYPE_URL_ENCODED);
 300                 String codeEncoded = UrlEncoded.encode(codeChallenge, Charset.defaultCharset(), false);
 301                 codeRequest.content(new StringContentProvider(codeEncoded));
 302                 ContentResponse codeResponse = codeRequest.timeout(HTTP_TIMEOUT_SEC, TimeUnit.SECONDS).send();
 303                 String code = ConnectedDriveProxy.codeFromUrl(codeResponse.getHeaders().get(HttpHeader.LOCATION));
 304
 305                 // Get Token
 306                 String tokenUrl = "https://" + BimmerConstants.AUTH_SERVER_MAP.get(configuration.region)
 307                         + BimmerConstants.TOKEN_ENDPOINT;
 308
 309                 Request tokenRequest = authHttpClient.POST(tokenUrl).followRedirects(false);
 310                 tokenRequest.header(HttpHeader.CONTENT_TYPE, CONTENT_TYPE_URL_ENCODED);
 311                 tokenRequest.header(HttpHeader.AUTHORIZATION,
 312                         BimmerConstants.AUTHORIZATION_VALUE_MAP.get(configuration.region));
 313                 String tokenEncoded = UrlEncoded.encode(getTokenValues(code), Charset.defaultCharset(), false);
 314                 tokenRequest.content(new StringContentProvider(tokenEncoded));
 315                 ContentResponse tokenResponse = tokenRequest.timeout(HTTP_TIMEOUT_SEC, TimeUnit.SECONDS).send();
 316                 AuthResponse authResponseJson = Converter.getGson().fromJson(tokenResponse.getContentAsString(),
 317                         AuthResponse.class);
 318                 token.setToken(authResponseJson.accessToken);
 319                 token.setType(authResponseJson.tokenType);
 320                 token.setExpiration(authResponseJson.expiresIn);
 321                 token.setMyBmwApiUsage(true);
 322                 return true;
 323             }
 324         } catch (InterruptedException | ExecutionException |
 325
 326                 TimeoutException e) {
 327             logger.debug("Authorization exception: {}", e.getMessage());
 328         }
 329         return false;
 330     }
 331
 332     private boolean startAuthClient() {
 333         if (!authHttpClient.isStarted()) {
 334             try {
 335                 authHttpClient.start();
 336             } catch (Exception e) {
 337                 logger.error("Auth HttpClient start failed!");
 338                 return false;
 339             }
 340         }
 341         return true;
 342     }
 343
 344     private MultiMap<String> getTokenBaseValues() {
 345         MultiMap<String> baseValues = new MultiMap<String>();
 346         baseValues.add(CLIENT_ID, Constants.EMPTY + BimmerConstants.CLIENT_ID.get(configuration.region));
 347         baseValues.add(RESPONSE_TYPE, CODE);
 348         baseValues.add(REDIRECT_URI, BimmerConstants.REDIRECT_URI_VALUE);
 349         baseValues.add("state", Constants.EMPTY + BimmerConstants.STATE.get(configuration.region));
 350         baseValues.add("nonce", "login_nonce");
 351         baseValues.add(SCOPE, BimmerConstants.SCOPE_VALUES);
 352         return baseValues;
 353     }
 354
 355     private MultiMap<String> getTokenAuthValues() {
 356         MultiMap<String> authValues = new MultiMap<String>();
 357         authValues.add(GRANT_TYPE, "authorization_code");
 358         authValues.add(USERNAME, configuration.userName);
 359         authValues.add(PASSWORD, configuration.password);
 360         return authValues;
 361     }
 362
 363     private MultiMap<String> getTokenValues(String code) {
 364         MultiMap<String> tokenValues = new MultiMap<String>();
 365         tokenValues.put(CODE, code);
 366         tokenValues.put("code_verifier", Constants.EMPTY + BimmerConstants.CODE_VERIFIER.get(configuration.region));
 367         tokenValues.put(REDIRECT_URI, BimmerConstants.REDIRECT_URI_VALUE);
 368         tokenValues.put(GRANT_TYPE, "authorization_code");
 369         return tokenValues;
 370     }
 371
 372     private String getAuthCode(String response) {
 373         String[] keys = response.split("&");
 374         for (int i = 0; i < keys.length; i++) {
 375             if (keys[i].startsWith(AUTHORIZATION)) {
 376                 String authCode = keys[i].split("=")[1];
 377                 authCode = authCode.split("\"")[0];
 378                 return authCode;
 379             }
 380         }
 381         return Constants.EMPTY;
 382     }
 383
 384     public synchronized boolean updateLegacyToken() {
 385         logger.debug("updateLegacyToken");
 386         try {
 387             /**
 388              * The authorization with Jetty HttpClient doens't work anymore
 389              * When calling Jetty with same headers and content a ConcurrentExcpetion is thrown
 390              * So fallback legacy authorization will stay on java.net handling
 391              */
 392             String authUri = "https://" + BimmerConstants.AUTH_SERVER_MAP.get(configuration.region)
 393                     + BimmerConstants.OAUTH_ENDPOINT;
 394             URL url = new URL(authUri);
 395             HttpURLConnection.setFollowRedirects(false);
 396             HttpURLConnection con = (HttpURLConnection) url.openConnection();
 397             con.setRequestMethod("POST");
 398             con.setRequestProperty(HttpHeader.CONTENT_TYPE.toString(), CONTENT_TYPE_URL_ENCODED);
 399             con.setRequestProperty(HttpHeader.CONNECTION.toString(), KEEP_ALIVE);
 400             con.setRequestProperty(HttpHeader.HOST.toString(),
 401                     BimmerConstants.API_SERVER_MAP.get(configuration.region));
 402             con.setRequestProperty(HttpHeader.AUTHORIZATION.toString(),
 403                     BimmerConstants.LEGACY_AUTHORIZATION_VALUE_MAP.get(configuration.region));
 404             con.setRequestProperty(CREDENTIALS, BimmerConstants.LEGACY_CREDENTIAL_VALUES);
 405             con.setDoOutput(true);
 406
 407             OutputStream os = con.getOutputStream();
 408             byte[] input = getAuthEncodedData().getBytes("utf-8");
 409             os.write(input, 0, input.length);
 410
 411             BufferedReader br = new BufferedReader(new InputStreamReader(con.getInputStream(), "utf-8"));
 412             StringBuilder response = new StringBuilder();
 413             String responseLine = null;
 414             while ((responseLine = br.readLine()) != null) {
 415                 response.append(responseLine.trim());
 416             }
 417             token.setMyBmwApiUsage(false);
 418             return tokenFromUrl(con.getHeaderField(HttpHeader.LOCATION.toString()));
 419         } catch (IOException e) {
 420             logger.warn("{}", e.getMessage());
 421         }
 422         return false;
 423     }
 424
 425     public boolean tokenFromUrl(String encodedUrl) {
 426         final MultiMap<String> tokenMap = new MultiMap<String>();
 427         UrlEncoded.decodeTo(encodedUrl, tokenMap, StandardCharsets.US_ASCII);
 428         tokenMap.forEach((key, value) -> {
 429             if (value.size() > 0) {
 430                 String val = value.get(0);
 431                 if (key.endsWith(ACCESS_TOKEN)) {
 432                     token.setToken(val.toString());
 433                 } else if (key.equals(EXPIRES_IN)) {
 434                     token.setExpiration(Integer.parseInt(val.toString()));
 435                 } else if (key.equals(TOKEN_TYPE)) {
 436                     token.setType(val.toString());
 437                 }
 438             }
 439         });
 440         logger.info("Token valid? {}", token.isValid());
 441         return token.isValid();
 442     }
 443
 444     public static String codeFromUrl(String encodedUrl) {
 445         final MultiMap<String> tokenMap = new MultiMap<String>();
 446         UrlEncoded.decodeTo(encodedUrl, tokenMap, StandardCharsets.US_ASCII);
 447         final StringBuilder codeFound = new StringBuilder();
 448         tokenMap.forEach((key, value) -> {
 449             if (value.size() > 0) {
 450                 String val = value.get(0);
 451                 if (key.endsWith(CODE)) {
 452                     codeFound.append(val.toString());
 453                 }
 454             }
 455         });
 456         return codeFound.toString();
 457     }
 458
 459     private String getAuthEncodedData() {
 460         MultiMap<String> dataMap = new MultiMap<String>();
 461         dataMap.add(CLIENT_ID, BimmerConstants.LEGACY_CLIENT_ID);
 462         dataMap.add(RESPONSE_TYPE, TOKEN);
 463         dataMap.add(REDIRECT_URI, BimmerConstants.LEGACY_REDIRECT_URI_VALUE);
 464         dataMap.add(SCOPE, BimmerConstants.LEGACY_SCOPE_VALUES);
 465         dataMap.add(USERNAME, configuration.userName);
 466         dataMap.add(PASSWORD, configuration.password);
 467         return UrlEncoded.encode(dataMap, Charset.defaultCharset(), false);
 468     }
 469 }