nmode's Git Repositories - signal-cli/blob - src/main/java/org/asamk/signal/Manager.java

   1 /**
   2  * Copyright (C) 2015 AsamK
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17 package org.asamk.signal;
  18
  19 import com.fasterxml.jackson.annotation.JsonAutoDetect;
  20 import com.fasterxml.jackson.annotation.PropertyAccessor;
  21 import com.fasterxml.jackson.databind.DeserializationFeature;
  22 import com.fasterxml.jackson.databind.JsonNode;
  23 import com.fasterxml.jackson.databind.ObjectMapper;
  24 import com.fasterxml.jackson.databind.SerializationFeature;
  25 import com.fasterxml.jackson.databind.node.ObjectNode;
  26 import org.apache.http.util.TextUtils;
  27 import org.asamk.Signal;
  28 import org.whispersystems.libsignal.*;
  29 import org.whispersystems.libsignal.ecc.Curve;
  30 import org.whispersystems.libsignal.ecc.ECKeyPair;
  31 import org.whispersystems.libsignal.ecc.ECPublicKey;
  32 import org.whispersystems.libsignal.state.PreKeyRecord;
  33 import org.whispersystems.libsignal.state.SignalProtocolStore;
  34 import org.whispersystems.libsignal.state.SignedPreKeyRecord;
  35 import org.whispersystems.libsignal.util.KeyHelper;
  36 import org.whispersystems.libsignal.util.Medium;
  37 import org.whispersystems.libsignal.util.guava.Optional;
  38 import org.whispersystems.signalservice.api.SignalServiceAccountManager;
  39 import org.whispersystems.signalservice.api.SignalServiceMessagePipe;
  40 import org.whispersystems.signalservice.api.SignalServiceMessageReceiver;
  41 import org.whispersystems.signalservice.api.SignalServiceMessageSender;
  42 import org.whispersystems.signalservice.api.crypto.SignalServiceCipher;
  43 import org.whispersystems.signalservice.api.crypto.UntrustedIdentityException;
  44 import org.whispersystems.signalservice.api.messages.*;
  45 import org.whispersystems.signalservice.api.messages.multidevice.*;
  46 import org.whispersystems.signalservice.api.push.SignalServiceAddress;
  47 import org.whispersystems.signalservice.api.push.TrustStore;
  48 import org.whispersystems.signalservice.api.push.exceptions.AuthorizationFailedException;
  49 import org.whispersystems.signalservice.api.push.exceptions.EncapsulatedExceptions;
  50 import org.whispersystems.signalservice.api.util.InvalidNumberException;
  51 import org.whispersystems.signalservice.api.util.PhoneNumberFormatter;
  52 import org.whispersystems.signalservice.internal.push.SignalServiceProtos;
  53
  54 import java.io.*;
  55 import java.net.URI;
  56 import java.net.URISyntaxException;
  57 import java.net.URLDecoder;
  58 import java.net.URLEncoder;
  59 import java.nio.file.Files;
  60 import java.nio.file.Paths;
  61 import java.util.*;
  62 import java.util.concurrent.TimeUnit;
  63 import java.util.concurrent.TimeoutException;
  64
  65 class Manager implements Signal {
  66     private final static String URL = "https://textsecure-service.whispersystems.org";
  67     private final static TrustStore TRUST_STORE = new WhisperTrustStore();
  68
  69     public final static String PROJECT_NAME = Manager.class.getPackage().getImplementationTitle();
  70     public final static String PROJECT_VERSION = Manager.class.getPackage().getImplementationVersion();
  71     private final static String USER_AGENT = PROJECT_NAME == null ? null : PROJECT_NAME + " " + PROJECT_VERSION;
  72
  73     private final static int PREKEY_MINIMUM_COUNT = 20;
  74     private static final int PREKEY_BATCH_SIZE = 100;
  75
  76     private final String settingsPath;
  77     private final String dataPath;
  78     private final String attachmentsPath;
  79
  80     private final ObjectMapper jsonProcessot = new ObjectMapper();
  81     private String username;
  82     private int deviceId = SignalServiceAddress.DEFAULT_DEVICE_ID;
  83     private String password;
  84     private String signalingKey;
  85     private int preKeyIdOffset;
  86     private int nextSignedPreKeyId;
  87
  88     private boolean registered = false;
  89
  90     private SignalProtocolStore signalProtocolStore;
  91     private SignalServiceAccountManager accountManager;
  92     private JsonGroupStore groupStore;
  93
  94     public Manager(String username, String settingsPath) {
  95         this.username = username;
  96         this.settingsPath = settingsPath;
  97         this.dataPath = this.settingsPath + "/data";
  98         this.attachmentsPath = this.settingsPath + "/attachments";
  99
 100         jsonProcessot.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.NONE); // disable autodetect
 101         jsonProcessot.enable(SerializationFeature.INDENT_OUTPUT); // for pretty print, you can disable it.
 102         jsonProcessot.enable(SerializationFeature.WRITE_NULL_MAP_VALUES);
 103         jsonProcessot.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
 104     }
 105
 106     public String getUsername() {
 107         return username;
 108     }
 109
 110     public int getDeviceId() {
 111         return deviceId;
 112     }
 113
 114     public String getFileName() {
 115         new File(dataPath).mkdirs();
 116         return dataPath + "/" + username;
 117     }
 118
 119     public boolean userExists() {
 120         if (username == null) {
 121             return false;
 122         }
 123         File f = new File(getFileName());
 124         return !(!f.exists() || f.isDirectory());
 125     }
 126
 127     public boolean userHasKeys() {
 128         return signalProtocolStore != null;
 129     }
 130
 131     private JsonNode getNotNullNode(JsonNode parent, String name) throws InvalidObjectException {
 132         JsonNode node = parent.get(name);
 133         if (node == null) {
 134             throw new InvalidObjectException(String.format("Incorrect file format: expected parameter %s not found ", name));
 135         }
 136
 137         return node;
 138     }
 139
 140     public void load() throws IOException, InvalidKeyException {
 141         JsonNode rootNode = jsonProcessot.readTree(new File(getFileName()));
 142
 143         JsonNode node = rootNode.get("deviceId");
 144         if (node != null) {
 145             deviceId = node.asInt();
 146         }
 147         username = getNotNullNode(rootNode, "username").asText();
 148         password = getNotNullNode(rootNode, "password").asText();
 149         if (rootNode.has("signalingKey")) {
 150             signalingKey = getNotNullNode(rootNode, "signalingKey").asText();
 151         }
 152         if (rootNode.has("preKeyIdOffset")) {
 153             preKeyIdOffset = getNotNullNode(rootNode, "preKeyIdOffset").asInt(0);
 154         } else {
 155             preKeyIdOffset = 0;
 156         }
 157         if (rootNode.has("nextSignedPreKeyId")) {
 158             nextSignedPreKeyId = getNotNullNode(rootNode, "nextSignedPreKeyId").asInt();
 159         } else {
 160             nextSignedPreKeyId = 0;
 161         }
 162         signalProtocolStore = jsonProcessot.convertValue(getNotNullNode(rootNode, "axolotlStore"), JsonSignalProtocolStore.class);
 163         registered = getNotNullNode(rootNode, "registered").asBoolean();
 164         JsonNode groupStoreNode = rootNode.get("groupStore");
 165         if (groupStoreNode != null) {
 166             groupStore = jsonProcessot.convertValue(groupStoreNode, JsonGroupStore.class);
 167         }
 168         if (groupStore == null) {
 169             groupStore = new JsonGroupStore();
 170         }
 171         accountManager = new SignalServiceAccountManager(URL, TRUST_STORE, username, password, deviceId, USER_AGENT);
 172         try {
 173             if (registered && accountManager.getPreKeysCount() < PREKEY_MINIMUM_COUNT) {
 174                 refreshPreKeys();
 175                 save();
 176             }
 177         } catch (AuthorizationFailedException e) {
 178             System.err.println("Authorization failed, was the number registered elsewhere?");
 179         }
 180     }
 181
 182     private void save() {
 183         ObjectNode rootNode = jsonProcessot.createObjectNode();
 184         rootNode.put("username", username)
 185                 .put("deviceId", deviceId)
 186                 .put("password", password)
 187                 .put("signalingKey", signalingKey)
 188                 .put("preKeyIdOffset", preKeyIdOffset)
 189                 .put("nextSignedPreKeyId", nextSignedPreKeyId)
 190                 .put("registered", registered)
 191                 .putPOJO("axolotlStore", signalProtocolStore)
 192                 .putPOJO("groupStore", groupStore)
 193         ;
 194         try {
 195             jsonProcessot.writeValue(new File(getFileName()), rootNode);
 196         } catch (Exception e) {
 197             System.err.println(String.format("Error saving file: %s", e.getMessage()));
 198         }
 199     }
 200
 201     public void createNewIdentity() {
 202         IdentityKeyPair identityKey = KeyHelper.generateIdentityKeyPair();
 203         int registrationId = KeyHelper.generateRegistrationId(false);
 204         signalProtocolStore = new JsonSignalProtocolStore(identityKey, registrationId);
 205         groupStore = new JsonGroupStore();
 206         registered = false;
 207         save();
 208     }
 209
 210     public boolean isRegistered() {
 211         return registered;
 212     }
 213
 214     public void register(boolean voiceVerication) throws IOException {
 215         password = Util.getSecret(18);
 216
 217         accountManager = new SignalServiceAccountManager(URL, TRUST_STORE, username, password, USER_AGENT);
 218
 219         if (voiceVerication)
 220             accountManager.requestVoiceVerificationCode();
 221         else
 222             accountManager.requestSmsVerificationCode();
 223
 224         registered = false;
 225         save();
 226     }
 227
 228     public URI getDeviceLinkUri() throws TimeoutException, IOException {
 229         password = Util.getSecret(18);
 230
 231         accountManager = new SignalServiceAccountManager(URL, TRUST_STORE, username, password, USER_AGENT);
 232         String uuid = accountManager.getNewDeviceUuid();
 233
 234         registered = false;
 235         try {
 236             return new URI("tsdevice:/?uuid=" + URLEncoder.encode(uuid, "utf-8") + "&pub_key=" + URLEncoder.encode(Base64.encodeBytesWithoutPadding(signalProtocolStore.getIdentityKeyPair().getPublicKey().serialize()), "utf-8"));
 237         } catch (URISyntaxException e) {
 238             // Shouldn't happen
 239             return null;
 240         }
 241     }
 242
 243     public void finishDeviceLink(String deviceName) throws IOException, InvalidKeyException, TimeoutException, UserAlreadyExists {
 244         signalingKey = Util.getSecret(52);
 245         SignalServiceAccountManager.NewDeviceRegistrationReturn ret = accountManager.finishNewDeviceRegistration(signalProtocolStore.getIdentityKeyPair(), signalingKey, false, true, signalProtocolStore.getLocalRegistrationId(), deviceName);
 246         deviceId = ret.getDeviceId();
 247         username = ret.getNumber();
 248         // TODO do this check before actually registering
 249         if (userExists()) {
 250             throw new UserAlreadyExists(username, getFileName());
 251         }
 252         signalProtocolStore = new JsonSignalProtocolStore(ret.getIdentity(), signalProtocolStore.getLocalRegistrationId());
 253
 254         registered = true;
 255         refreshPreKeys();
 256
 257         requestSyncGroups();
 258         requestSyncContacts();
 259
 260         save();
 261     }
 262
 263     public List<DeviceInfo> getLinkedDevices() throws IOException {
 264         return accountManager.getDevices();
 265     }
 266
 267     public void removeLinkedDevices(int deviceId) throws IOException {
 268         accountManager.removeDevice(deviceId);
 269     }
 270
 271     public static Map<String, String> getQueryMap(String query) {
 272         String[] params = query.split("&");
 273         Map<String, String> map = new HashMap<>();
 274         for (String param : params) {
 275             String name = null;
 276             try {
 277                 name = URLDecoder.decode(param.split("=")[0], "utf-8");
 278             } catch (UnsupportedEncodingException e) {
 279                 // Impossible
 280             }
 281             String value = null;
 282             try {
 283                 value = URLDecoder.decode(param.split("=")[1], "utf-8");
 284             } catch (UnsupportedEncodingException e) {
 285                 // Impossible
 286             }
 287             map.put(name, value);
 288         }
 289         return map;
 290     }
 291
 292     public void addDeviceLink(URI linkUri) throws IOException, InvalidKeyException {
 293         Map<String, String> query = getQueryMap(linkUri.getQuery());
 294         String deviceIdentifier = query.get("uuid");
 295         String publicKeyEncoded = query.get("pub_key");
 296
 297         if (TextUtils.isEmpty(deviceIdentifier) || TextUtils.isEmpty(publicKeyEncoded)) {
 298             throw new RuntimeException("Invalid device link uri");
 299         }
 300
 301         ECPublicKey deviceKey = Curve.decodePoint(Base64.decode(publicKeyEncoded), 0);
 302
 303         addDeviceLink(deviceIdentifier, deviceKey);
 304     }
 305
 306     private void addDeviceLink(String deviceIdentifier, ECPublicKey deviceKey) throws IOException, InvalidKeyException {
 307         IdentityKeyPair identityKeyPair = signalProtocolStore.getIdentityKeyPair();
 308         String verificationCode = accountManager.getNewDeviceVerificationCode();
 309
 310         accountManager.addDevice(deviceIdentifier, deviceKey, identityKeyPair, verificationCode);
 311     }
 312
 313     private List<PreKeyRecord> generatePreKeys() {
 314         List<PreKeyRecord> records = new LinkedList<>();
 315
 316         for (int i = 0; i < PREKEY_BATCH_SIZE; i++) {
 317             int preKeyId = (preKeyIdOffset + i) % Medium.MAX_VALUE;
 318             ECKeyPair keyPair = Curve.generateKeyPair();
 319             PreKeyRecord record = new PreKeyRecord(preKeyId, keyPair);
 320
 321             signalProtocolStore.storePreKey(preKeyId, record);
 322             records.add(record);
 323         }
 324
 325         preKeyIdOffset = (preKeyIdOffset + PREKEY_BATCH_SIZE + 1) % Medium.MAX_VALUE;
 326         save();
 327
 328         return records;
 329     }
 330
 331     private PreKeyRecord getOrGenerateLastResortPreKey() {
 332         if (signalProtocolStore.containsPreKey(Medium.MAX_VALUE)) {
 333             try {
 334                 return signalProtocolStore.loadPreKey(Medium.MAX_VALUE);
 335             } catch (InvalidKeyIdException e) {
 336                 signalProtocolStore.removePreKey(Medium.MAX_VALUE);
 337             }
 338         }
 339
 340         ECKeyPair keyPair = Curve.generateKeyPair();
 341         PreKeyRecord record = new PreKeyRecord(Medium.MAX_VALUE, keyPair);
 342
 343         signalProtocolStore.storePreKey(Medium.MAX_VALUE, record);
 344         save();
 345
 346         return record;
 347     }
 348
 349     private SignedPreKeyRecord generateSignedPreKey(IdentityKeyPair identityKeyPair) {
 350         try {
 351             ECKeyPair keyPair = Curve.generateKeyPair();
 352             byte[] signature = Curve.calculateSignature(identityKeyPair.getPrivateKey(), keyPair.getPublicKey().serialize());
 353             SignedPreKeyRecord record = new SignedPreKeyRecord(nextSignedPreKeyId, System.currentTimeMillis(), keyPair, signature);
 354
 355             signalProtocolStore.storeSignedPreKey(nextSignedPreKeyId, record);
 356             nextSignedPreKeyId = (nextSignedPreKeyId + 1) % Medium.MAX_VALUE;
 357             save();
 358
 359             return record;
 360         } catch (InvalidKeyException e) {
 361             throw new AssertionError(e);
 362         }
 363     }
 364
 365     public void verifyAccount(String verificationCode) throws IOException {
 366         verificationCode = verificationCode.replace("-", "");
 367         signalingKey = Util.getSecret(52);
 368         accountManager.verifyAccountWithCode(verificationCode, signalingKey, signalProtocolStore.getLocalRegistrationId(), false, true);
 369
 370         //accountManager.setGcmId(Optional.of(GoogleCloudMessaging.getInstance(this).register(REGISTRATION_ID)));
 371         registered = true;
 372
 373         refreshPreKeys();
 374         save();
 375     }
 376
 377     private void refreshPreKeys() throws IOException {
 378         List<PreKeyRecord> oneTimePreKeys = generatePreKeys();
 379         PreKeyRecord lastResortKey = getOrGenerateLastResortPreKey();
 380         SignedPreKeyRecord signedPreKeyRecord = generateSignedPreKey(signalProtocolStore.getIdentityKeyPair());
 381
 382         accountManager.setPreKeys(signalProtocolStore.getIdentityKeyPair().getPublicKey(), lastResortKey, signedPreKeyRecord, oneTimePreKeys);
 383     }
 384
 385
 386     private static List<SignalServiceAttachment> getSignalServiceAttachments(List<String> attachments) throws AttachmentInvalidException {
 387         List<SignalServiceAttachment> SignalServiceAttachments = null;
 388         if (attachments != null) {
 389             SignalServiceAttachments = new ArrayList<>(attachments.size());
 390             for (String attachment : attachments) {
 391                 try {
 392                     SignalServiceAttachments.add(createAttachment(attachment));
 393                 } catch (IOException e) {
 394                     throw new AttachmentInvalidException(attachment, e);
 395                 }
 396             }
 397         }
 398         return SignalServiceAttachments;
 399     }
 400
 401     private static SignalServiceAttachment createAttachment(String attachment) throws IOException {
 402         File attachmentFile = new File(attachment);
 403         InputStream attachmentStream = new FileInputStream(attachmentFile);
 404         final long attachmentSize = attachmentFile.length();
 405         String mime = Files.probeContentType(Paths.get(attachment));
 406         return new SignalServiceAttachmentStream(attachmentStream, mime, attachmentSize, null);
 407     }
 408
 409     @Override
 410     public void sendGroupMessage(String messageText, List<String> attachments,
 411                                  byte[] groupId)
 412             throws IOException, EncapsulatedExceptions, GroupNotFoundException, AttachmentInvalidException, UntrustedIdentityException {
 413         final SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder().withBody(messageText);
 414         if (attachments != null) {
 415             messageBuilder.withAttachments(getSignalServiceAttachments(attachments));
 416         }
 417         if (groupId != null) {
 418             SignalServiceGroup group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.DELIVER)
 419                     .withId(groupId)
 420                     .build();
 421             messageBuilder.asGroupMessage(group);
 422         }
 423         SignalServiceDataMessage message = messageBuilder.build();
 424
 425         Set<String> members = groupStore.getGroup(groupId).members;
 426         members.remove(this.username);
 427         sendMessage(message, members);
 428     }
 429
 430     public void sendQuitGroupMessage(byte[] groupId) throws GroupNotFoundException, IOException, EncapsulatedExceptions, UntrustedIdentityException {
 431         SignalServiceGroup group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.QUIT)
 432                 .withId(groupId)
 433                 .build();
 434
 435         SignalServiceDataMessage message = SignalServiceDataMessage.newBuilder()
 436                 .asGroupMessage(group)
 437                 .build();
 438
 439         final GroupInfo g = groupStore.getGroup(groupId);
 440         g.members.remove(this.username);
 441         groupStore.updateGroup(g);
 442
 443         sendMessage(message, g.members);
 444     }
 445
 446     public byte[] sendUpdateGroupMessage(byte[] groupId, String name, Collection<String> members, String avatarFile) throws IOException, EncapsulatedExceptions, GroupNotFoundException, AttachmentInvalidException, UntrustedIdentityException {
 447         GroupInfo g;
 448         if (groupId == null) {
 449             // Create new group
 450             g = new GroupInfo(Util.getSecretBytes(16));
 451             g.members.add(username);
 452         } else {
 453             g = groupStore.getGroup(groupId);
 454         }
 455
 456         if (name != null) {
 457             g.name = name;
 458         }
 459
 460         if (members != null) {
 461             for (String member : members) {
 462                 try {
 463                     g.members.add(canonicalizeNumber(member));
 464                 } catch (InvalidNumberException e) {
 465                     System.err.println("Failed to add member \"" + member + "\" to group: " + e.getMessage());
 466                     System.err.println("Aborting…");
 467                     System.exit(1);
 468                 }
 469             }
 470         }
 471
 472         SignalServiceGroup.Builder group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.UPDATE)
 473                 .withId(g.groupId)
 474                 .withName(g.name)
 475                 .withMembers(new ArrayList<>(g.members));
 476
 477         if (avatarFile != null) {
 478             try {
 479                 group.withAvatar(createAttachment(avatarFile));
 480                 // TODO
 481                 g.avatarId = 0;
 482             } catch (IOException e) {
 483                 throw new AttachmentInvalidException(avatarFile, e);
 484             }
 485         }
 486
 487         groupStore.updateGroup(g);
 488
 489         SignalServiceDataMessage message = SignalServiceDataMessage.newBuilder()
 490                 .asGroupMessage(group.build())
 491                 .build();
 492
 493         final Set<String> membersSend = g.members;
 494         membersSend.remove(this.username);
 495         sendMessage(message, membersSend);
 496         return g.groupId;
 497     }
 498
 499     @Override
 500     public void sendMessage(String message, List<String> attachments, String recipient)
 501             throws EncapsulatedExceptions, AttachmentInvalidException, IOException, UntrustedIdentityException {
 502         List<String> recipients = new ArrayList<>(1);
 503         recipients.add(recipient);
 504         sendMessage(message, attachments, recipients);
 505     }
 506
 507     @Override
 508     public void sendMessage(String messageText, List<String> attachments,
 509                             List<String> recipients)
 510             throws IOException, EncapsulatedExceptions, AttachmentInvalidException, UntrustedIdentityException {
 511         final SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder().withBody(messageText);
 512         if (attachments != null) {
 513             messageBuilder.withAttachments(getSignalServiceAttachments(attachments));
 514         }
 515         SignalServiceDataMessage message = messageBuilder.build();
 516
 517         sendMessage(message, recipients);
 518     }
 519
 520     @Override
 521     public void sendEndSessionMessage(List<String> recipients) throws IOException, EncapsulatedExceptions, UntrustedIdentityException {
 522         SignalServiceDataMessage message = SignalServiceDataMessage.newBuilder()
 523                 .asEndSessionMessage()
 524                 .build();
 525
 526         sendMessage(message, recipients);
 527     }
 528
 529     private void requestSyncGroups() throws IOException {
 530         SignalServiceProtos.SyncMessage.Request r = SignalServiceProtos.SyncMessage.Request.newBuilder().setType(SignalServiceProtos.SyncMessage.Request.Type.GROUPS).build();
 531         SignalServiceSyncMessage message = SignalServiceSyncMessage.forRequest(new RequestMessage(r));
 532         try {
 533             sendMessage(message);
 534         } catch (EncapsulatedExceptions encapsulatedExceptions) {
 535             encapsulatedExceptions.printStackTrace();
 536         } catch (UntrustedIdentityException e) {
 537             e.printStackTrace();
 538         }
 539     }
 540
 541     private void requestSyncContacts() throws IOException {
 542         SignalServiceProtos.SyncMessage.Request r = SignalServiceProtos.SyncMessage.Request.newBuilder().setType(SignalServiceProtos.SyncMessage.Request.Type.CONTACTS).build();
 543         SignalServiceSyncMessage message = SignalServiceSyncMessage.forRequest(new RequestMessage(r));
 544         try {
 545             sendMessage(message);
 546         } catch (EncapsulatedExceptions encapsulatedExceptions) {
 547             encapsulatedExceptions.printStackTrace();
 548         } catch (UntrustedIdentityException e) {
 549             e.printStackTrace();
 550         }
 551     }
 552
 553     private void sendMessage(SignalServiceSyncMessage message)
 554             throws IOException, EncapsulatedExceptions, UntrustedIdentityException {
 555         SignalServiceMessageSender messageSender = new SignalServiceMessageSender(URL, TRUST_STORE, username, password,
 556                 deviceId, signalProtocolStore, USER_AGENT, Optional.<SignalServiceMessageSender.EventListener>absent());
 557         messageSender.sendMessage(message);
 558     }
 559
 560     private void sendMessage(SignalServiceDataMessage message, Collection<String> recipients)
 561             throws IOException, EncapsulatedExceptions, UntrustedIdentityException {
 562         try {
 563             SignalServiceMessageSender messageSender = new SignalServiceMessageSender(URL, TRUST_STORE, username, password,
 564                     deviceId, signalProtocolStore, USER_AGENT, Optional.<SignalServiceMessageSender.EventListener>absent());
 565
 566             Set<SignalServiceAddress> recipientsTS = new HashSet<>(recipients.size());
 567             for (String recipient : recipients) {
 568                 try {
 569                     recipientsTS.add(getPushAddress(recipient));
 570                 } catch (InvalidNumberException e) {
 571                     System.err.println("Failed to add recipient \"" + recipient + "\": " + e.getMessage());
 572                     System.err.println("Aborting sending.");
 573                     save();
 574                     return;
 575                 }
 576             }
 577
 578             if (message.getGroupInfo().isPresent()) {
 579                 messageSender.sendMessage(new ArrayList<>(recipientsTS), message);
 580             } else {
 581                 // Send to all individually, so sync messages are sent correctly
 582                 for (SignalServiceAddress address : recipientsTS) {
 583                     messageSender.sendMessage(address, message);
 584                 }
 585             }
 586
 587             if (message.isEndSession()) {
 588                 for (SignalServiceAddress recipient : recipientsTS) {
 589                     handleEndSession(recipient.getNumber());
 590                 }
 591             }
 592         } finally {
 593             save();
 594         }
 595     }
 596
 597     private SignalServiceContent decryptMessage(SignalServiceEnvelope envelope) {
 598         SignalServiceCipher cipher = new SignalServiceCipher(new SignalServiceAddress(username), signalProtocolStore);
 599         try {
 600             return cipher.decrypt(envelope);
 601         } catch (Exception e) {
 602             // TODO handle all exceptions
 603             e.printStackTrace();
 604             return null;
 605         }
 606     }
 607
 608     private void handleEndSession(String source) {
 609         signalProtocolStore.deleteAllSessions(source);
 610     }
 611
 612     public interface ReceiveMessageHandler {
 613         void handleMessage(SignalServiceEnvelope envelope, SignalServiceContent decryptedContent, GroupInfo group);
 614     }
 615
 616     private GroupInfo handleSignalServiceDataMessage(SignalServiceDataMessage message, boolean isSync, String source, String destination) {
 617         GroupInfo group = null;
 618         if (message.getGroupInfo().isPresent()) {
 619             SignalServiceGroup groupInfo = message.getGroupInfo().get();
 620             switch (groupInfo.getType()) {
 621                 case UPDATE:
 622                     try {
 623                         group = groupStore.getGroup(groupInfo.getGroupId());
 624                     } catch (GroupNotFoundException e) {
 625                         group = new GroupInfo(groupInfo.getGroupId());
 626                     }
 627
 628                     if (groupInfo.getAvatar().isPresent()) {
 629                         SignalServiceAttachment avatar = groupInfo.getAvatar().get();
 630                         if (avatar.isPointer()) {
 631                             long avatarId = avatar.asPointer().getId();
 632                             try {
 633                                 retrieveAttachment(avatar.asPointer());
 634                                 // TODO store group avatar in /avatar/groups folder
 635                                 group.avatarId = avatarId;
 636                             } catch (IOException | InvalidMessageException e) {
 637                                 System.err.println("Failed to retrieve group avatar (" + avatarId + "): " + e.getMessage());
 638                             }
 639                         }
 640                     }
 641
 642                     if (groupInfo.getName().isPresent()) {
 643                         group.name = groupInfo.getName().get();
 644                     }
 645
 646                     if (groupInfo.getMembers().isPresent()) {
 647                         group.members.addAll(groupInfo.getMembers().get());
 648                     }
 649
 650                     groupStore.updateGroup(group);
 651                     break;
 652                 case DELIVER:
 653                     try {
 654                         group = groupStore.getGroup(groupInfo.getGroupId());
 655                     } catch (GroupNotFoundException e) {
 656                     }
 657                     break;
 658                 case QUIT:
 659                     try {
 660                         group = groupStore.getGroup(groupInfo.getGroupId());
 661                         group.members.remove(source);
 662                         groupStore.updateGroup(group);
 663                     } catch (GroupNotFoundException e) {
 664                     }
 665                     break;
 666             }
 667         }
 668         if (message.isEndSession()) {
 669             handleEndSession(isSync ? destination : source);
 670         }
 671         if (message.getAttachments().isPresent()) {
 672             for (SignalServiceAttachment attachment : message.getAttachments().get()) {
 673                 if (attachment.isPointer()) {
 674                     try {
 675                         retrieveAttachment(attachment.asPointer());
 676                     } catch (IOException | InvalidMessageException e) {
 677                         System.err.println("Failed to retrieve attachment (" + attachment.asPointer().getId() + "): " + e.getMessage());
 678                     }
 679                 }
 680             }
 681         }
 682         return group;
 683     }
 684
 685     public void receiveMessages(int timeoutSeconds, boolean returnOnTimeout, ReceiveMessageHandler handler) throws IOException {
 686         final SignalServiceMessageReceiver messageReceiver = new SignalServiceMessageReceiver(URL, TRUST_STORE, username, password, deviceId, signalingKey, USER_AGENT);
 687         SignalServiceMessagePipe messagePipe = null;
 688
 689         try {
 690             messagePipe = messageReceiver.createMessagePipe();
 691
 692             while (true) {
 693                 SignalServiceEnvelope envelope;
 694                 SignalServiceContent content = null;
 695                 GroupInfo group = null;
 696                 try {
 697                     envelope = messagePipe.read(timeoutSeconds, TimeUnit.SECONDS);
 698                     if (!envelope.isReceipt()) {
 699                         content = decryptMessage(envelope);
 700                         if (content != null) {
 701                             if (content.getDataMessage().isPresent()) {
 702                                 SignalServiceDataMessage message = content.getDataMessage().get();
 703                                 group = handleSignalServiceDataMessage(message, false, envelope.getSource(), username);
 704                             }
 705                             if (content.getSyncMessage().isPresent()) {
 706                                 SignalServiceSyncMessage syncMessage = content.getSyncMessage().get();
 707                                 if (syncMessage.getSent().isPresent()) {
 708                                     SignalServiceDataMessage message = syncMessage.getSent().get().getMessage();
 709                                     group = handleSignalServiceDataMessage(message, true, envelope.getSource(), syncMessage.getSent().get().getDestination().get());
 710                                 }
 711                                 if (syncMessage.getRequest().isPresent()) {
 712                                     RequestMessage rm = syncMessage.getRequest().get();
 713                                     if (rm.isContactsRequest()) {
 714                                         // TODO implement when we have contacts
 715                                     }
 716                                     if (rm.isGroupsRequest()) {
 717                                         try {
 718                                             sendGroups();
 719                                         } catch (EncapsulatedExceptions encapsulatedExceptions) {
 720                                             encapsulatedExceptions.printStackTrace();
 721                                         } catch (UntrustedIdentityException e) {
 722                                             e.printStackTrace();
 723                                         }
 724                                     }
 725                                 }
 726                                 if (syncMessage.getGroups().isPresent()) {
 727                                     try {
 728                                         DeviceGroupsInputStream s = new DeviceGroupsInputStream(retrieveAttachmentAsStream(syncMessage.getGroups().get().asPointer()));
 729                                         DeviceGroup g;
 730                                         while ((g = s.read()) != null) {
 731                                             GroupInfo syncGroup;
 732                                             try {
 733                                                 syncGroup = groupStore.getGroup(g.getId());
 734                                             } catch (GroupNotFoundException e) {
 735                                                 syncGroup = new GroupInfo(g.getId());
 736                                             }
 737                                             if (g.getName().isPresent()) {
 738                                                 syncGroup.name = g.getName().get();
 739                                             }
 740                                             syncGroup.members.addAll(g.getMembers());
 741                                             syncGroup.active = g.isActive();
 742
 743                                             if (g.getAvatar().isPresent()) {
 744                                                 byte[] ava = new byte[(int) g.getAvatar().get().getLength()];
 745                                                 org.whispersystems.signalservice.internal.util.Util.readFully(g.getAvatar().get().getInputStream(), ava);
 746                                                 // TODO store group avatar in /avatar/groups folder
 747                                             }
 748                                             groupStore.updateGroup(syncGroup);
 749                                         }
 750                                     } catch (Exception e) {
 751                                         e.printStackTrace();
 752                                     }
 753                                 }
 754                                 if (syncMessage.getContacts().isPresent()) {
 755                                     try {
 756                                         DeviceContactsInputStream s = new DeviceContactsInputStream(retrieveAttachmentAsStream(syncMessage.getContacts().get().asPointer()));
 757                                         DeviceContact c;
 758                                         while ((c = s.read()) != null) {
 759                                             // TODO implement when we have contact storage
 760                                             if (c.getName().isPresent()) {
 761                                                 c.getName().get();
 762                                             }
 763                                             c.getNumber();
 764
 765                                             if (c.getAvatar().isPresent()) {
 766                                                 byte[] ava = new byte[(int) c.getAvatar().get().getLength()];
 767                                                 org.whispersystems.signalservice.internal.util.Util.readFully(c.getAvatar().get().getInputStream(), ava);
 768                                                 // TODO store contact avatar in /avatar/contacts folder
 769                                             }
 770                                         }
 771                                     } catch (Exception e) {
 772                                         e.printStackTrace();
 773                                     }
 774                                 }
 775                             }
 776                         }
 777                     }
 778                     save();
 779                     handler.handleMessage(envelope, content, group);
 780                 } catch (TimeoutException e) {
 781                     if (returnOnTimeout)
 782                         return;
 783                 } catch (InvalidVersionException e) {
 784                     System.err.println("Ignoring error: " + e.getMessage());
 785                 }
 786             }
 787         } finally {
 788             if (messagePipe != null)
 789                 messagePipe.shutdown();
 790         }
 791     }
 792
 793     public File getAttachmentFile(long attachmentId) {
 794         return new File(attachmentsPath, attachmentId + "");
 795     }
 796
 797     private File retrieveAttachment(SignalServiceAttachmentPointer pointer) throws IOException, InvalidMessageException {
 798         final SignalServiceMessageReceiver messageReceiver = new SignalServiceMessageReceiver(URL, TRUST_STORE, username, password, deviceId, signalingKey, USER_AGENT);
 799
 800         File tmpFile = File.createTempFile("ts_attach_" + pointer.getId(), ".tmp");
 801         InputStream input = messageReceiver.retrieveAttachment(pointer, tmpFile);
 802
 803         new File(attachmentsPath).mkdirs();
 804         File outputFile = getAttachmentFile(pointer.getId());
 805         OutputStream output = null;
 806         try {
 807             output = new FileOutputStream(outputFile);
 808             byte[] buffer = new byte[4096];
 809             int read;
 810
 811             while ((read = input.read(buffer)) != -1) {
 812                 output.write(buffer, 0, read);
 813             }
 814         } catch (FileNotFoundException e) {
 815             e.printStackTrace();
 816             return null;
 817         } finally {
 818             if (output != null) {
 819                 output.close();
 820                 output = null;
 821             }
 822             if (!tmpFile.delete()) {
 823                 System.err.println("Failed to delete temp file: " + tmpFile);
 824             }
 825         }
 826         if (pointer.getPreview().isPresent()) {
 827             File previewFile = new File(outputFile + ".preview");
 828             try {
 829                 output = new FileOutputStream(previewFile);
 830                 byte[] preview = pointer.getPreview().get();
 831                 output.write(preview, 0, preview.length);
 832             } catch (FileNotFoundException e) {
 833                 e.printStackTrace();
 834                 return null;
 835             } finally {
 836                 if (output != null) {
 837                     output.close();
 838                 }
 839             }
 840         }
 841         return outputFile;
 842     }
 843
 844     private InputStream retrieveAttachmentAsStream(SignalServiceAttachmentPointer pointer) throws IOException, InvalidMessageException {
 845         final SignalServiceMessageReceiver messageReceiver = new SignalServiceMessageReceiver(URL, TRUST_STORE, username, password, deviceId, signalingKey, USER_AGENT);
 846         File file = File.createTempFile("ts_tmp", "tmp");
 847         file.deleteOnExit();
 848
 849         return messageReceiver.retrieveAttachment(pointer, file);
 850     }
 851
 852     private String canonicalizeNumber(String number) throws InvalidNumberException {
 853         String localNumber = username;
 854         return PhoneNumberFormatter.formatNumber(number, localNumber);
 855     }
 856
 857     private SignalServiceAddress getPushAddress(String number) throws InvalidNumberException {
 858         String e164number = canonicalizeNumber(number);
 859         return new SignalServiceAddress(e164number);
 860     }
 861
 862     @Override
 863     public boolean isRemote() {
 864         return false;
 865     }
 866
 867     private void sendGroups() throws IOException, EncapsulatedExceptions, UntrustedIdentityException {
 868         File contactsFile = File.createTempFile("multidevice-contact-update", ".tmp");
 869
 870         try {
 871             DeviceGroupsOutputStream out = new DeviceGroupsOutputStream(new FileOutputStream(contactsFile));
 872             try {
 873                 for (GroupInfo record : groupStore.getGroups()) {
 874                     out.write(new DeviceGroup(record.groupId, Optional.fromNullable(record.name),
 875                             new ArrayList<>(record.members), Optional.of(new SignalServiceAttachmentStream(new FileInputStream("/home/sebastian/Bilder/00026_150512_14-00-18.JPG"), "octet", new File("/home/sebastian/Bilder/00026_150512_14-00-18.JPG").length(), null)),
 876                             record.active));
 877                 }
 878             } finally {
 879                 out.close();
 880             }
 881
 882             if (contactsFile.exists() && contactsFile.length() > 0) {
 883                 FileInputStream contactsFileStream = new FileInputStream(contactsFile);
 884                 SignalServiceAttachmentStream attachmentStream = SignalServiceAttachment.newStreamBuilder()
 885                         .withStream(contactsFileStream)
 886                         .withContentType("application/octet-stream")
 887                         .withLength(contactsFile.length())
 888                         .build();
 889
 890                 sendMessage(SignalServiceSyncMessage.forGroups(attachmentStream));
 891             }
 892         } finally {
 893             if (contactsFile != null) contactsFile.delete();
 894         }
 895     }
 896 }