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