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         sendMessage(message, groupStore.getGroup(groupId).members);
 415     }
 416
 417     public void sendQuitGroupMessage(byte[] groupId) throws GroupNotFoundException, IOException, EncapsulatedExceptions, UntrustedIdentityException {
 418         SignalServiceGroup group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.QUIT)
 419                 .withId(groupId)
 420                 .build();
 421
 422         SignalServiceDataMessage message = SignalServiceDataMessage.newBuilder()
 423                 .asGroupMessage(group)
 424                 .build();
 425
 426         sendMessage(message, groupStore.getGroup(groupId).members);
 427     }
 428
 429     public byte[] sendUpdateGroupMessage(byte[] groupId, String name, Collection<String> members, String avatarFile) throws IOException, EncapsulatedExceptions, GroupNotFoundException, AttachmentInvalidException, UntrustedIdentityException {
 430         GroupInfo g;
 431         if (groupId == null) {
 432             // Create new group
 433             g = new GroupInfo(Util.getSecretBytes(16));
 434             g.members.add(username);
 435         } else {
 436             g = groupStore.getGroup(groupId);
 437         }
 438
 439         if (name != null) {
 440             g.name = name;
 441         }
 442
 443         if (members != null) {
 444             for (String member : members) {
 445                 try {
 446                     g.members.add(canonicalizeNumber(member));
 447                 } catch (InvalidNumberException e) {
 448                     System.err.println("Failed to add member \"" + member + "\" to group: " + e.getMessage());
 449                     System.err.println("Aborting…");
 450                     System.exit(1);
 451                 }
 452             }
 453         }
 454
 455         SignalServiceGroup.Builder group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.UPDATE)
 456                 .withId(g.groupId)
 457                 .withName(g.name)
 458                 .withMembers(new ArrayList<>(g.members));
 459
 460         if (avatarFile != null) {
 461             try {
 462                 group.withAvatar(createAttachment(avatarFile));
 463                 // TODO
 464                 g.avatarId = 0;
 465             } catch (IOException e) {
 466                 throw new AttachmentInvalidException(avatarFile, e);
 467             }
 468         }
 469
 470         groupStore.updateGroup(g);
 471
 472         SignalServiceDataMessage message = SignalServiceDataMessage.newBuilder()
 473                 .asGroupMessage(group.build())
 474                 .build();
 475
 476         sendMessage(message, g.members);
 477         return g.groupId;
 478     }
 479
 480     @Override
 481     public void sendMessage(String message, List<String> attachments, String recipient)
 482             throws EncapsulatedExceptions, AttachmentInvalidException, IOException, UntrustedIdentityException {
 483         List<String> recipients = new ArrayList<>(1);
 484         recipients.add(recipient);
 485         sendMessage(message, attachments, recipients);
 486     }
 487
 488     @Override
 489     public void sendMessage(String messageText, List<String> attachments,
 490                             List<String> recipients)
 491             throws IOException, EncapsulatedExceptions, AttachmentInvalidException, UntrustedIdentityException {
 492         final SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder().withBody(messageText);
 493         if (attachments != null) {
 494             messageBuilder.withAttachments(getSignalServiceAttachments(attachments));
 495         }
 496         SignalServiceDataMessage message = messageBuilder.build();
 497
 498         sendMessage(message, recipients);
 499     }
 500
 501     @Override
 502     public void sendEndSessionMessage(List<String> recipients) throws IOException, EncapsulatedExceptions, UntrustedIdentityException {
 503         SignalServiceDataMessage message = SignalServiceDataMessage.newBuilder()
 504                 .asEndSessionMessage()
 505                 .build();
 506
 507         sendMessage(message, recipients);
 508     }
 509
 510     private void requestSyncGroups() throws IOException {
 511         SignalServiceProtos.SyncMessage.Request r = SignalServiceProtos.SyncMessage.Request.newBuilder().setType(SignalServiceProtos.SyncMessage.Request.Type.GROUPS).build();
 512         SignalServiceSyncMessage message = SignalServiceSyncMessage.forRequest(new RequestMessage(r));
 513         try {
 514             sendMessage(message);
 515         } catch (EncapsulatedExceptions encapsulatedExceptions) {
 516             encapsulatedExceptions.printStackTrace();
 517         } catch (UntrustedIdentityException e) {
 518             e.printStackTrace();
 519         }
 520     }
 521
 522     private void requestSyncContacts() throws IOException {
 523         SignalServiceProtos.SyncMessage.Request r = SignalServiceProtos.SyncMessage.Request.newBuilder().setType(SignalServiceProtos.SyncMessage.Request.Type.CONTACTS).build();
 524         SignalServiceSyncMessage message = SignalServiceSyncMessage.forRequest(new RequestMessage(r));
 525         try {
 526             sendMessage(message);
 527         } catch (EncapsulatedExceptions encapsulatedExceptions) {
 528             encapsulatedExceptions.printStackTrace();
 529         } catch (UntrustedIdentityException e) {
 530             e.printStackTrace();
 531         }
 532     }
 533
 534     private void sendMessage(SignalServiceSyncMessage message)
 535             throws IOException, EncapsulatedExceptions, UntrustedIdentityException {
 536         SignalServiceMessageSender messageSender = new SignalServiceMessageSender(URL, TRUST_STORE, username, password,
 537                 deviceId, signalProtocolStore, USER_AGENT, Optional.<SignalServiceMessageSender.EventListener>absent());
 538         messageSender.sendMessage(message);
 539     }
 540
 541     private void sendMessage(SignalServiceDataMessage message, Collection<String> recipients)
 542             throws IOException, EncapsulatedExceptions, UntrustedIdentityException {
 543         SignalServiceMessageSender messageSender = new SignalServiceMessageSender(URL, TRUST_STORE, username, password,
 544                 deviceId, signalProtocolStore, USER_AGENT, Optional.<SignalServiceMessageSender.EventListener>absent());
 545
 546         Set<SignalServiceAddress> recipientsTS = new HashSet<>(recipients.size());
 547         for (String recipient : recipients) {
 548             try {
 549                 recipientsTS.add(getPushAddress(recipient));
 550             } catch (InvalidNumberException e) {
 551                 System.err.println("Failed to add recipient \"" + recipient + "\": " + e.getMessage());
 552                 System.err.println("Aborting sending.");
 553                 save();
 554                 return;
 555             }
 556         }
 557
 558         if (message.getGroupInfo().isPresent()) {
 559             messageSender.sendMessage(new ArrayList<>(recipientsTS), message);
 560         } else {
 561             // Send to all individually, so sync messages are sent correctly
 562             for (SignalServiceAddress address : recipientsTS) {
 563                 messageSender.sendMessage(address, message);
 564             }
 565         }
 566
 567         if (message.isEndSession()) {
 568             for (SignalServiceAddress recipient : recipientsTS) {
 569                 handleEndSession(recipient.getNumber());
 570             }
 571         }
 572         save();
 573     }
 574
 575     private SignalServiceContent decryptMessage(SignalServiceEnvelope envelope) {
 576         SignalServiceCipher cipher = new SignalServiceCipher(new SignalServiceAddress(username), signalProtocolStore);
 577         try {
 578             return cipher.decrypt(envelope);
 579         } catch (Exception e) {
 580             // TODO handle all exceptions
 581             e.printStackTrace();
 582             return null;
 583         }
 584     }
 585
 586     private void handleEndSession(String source) {
 587         signalProtocolStore.deleteAllSessions(source);
 588     }
 589
 590     public interface ReceiveMessageHandler {
 591         void handleMessage(SignalServiceEnvelope envelope, SignalServiceContent decryptedContent, GroupInfo group);
 592     }
 593
 594     private GroupInfo handleSignalServiceDataMessage(SignalServiceDataMessage message, boolean isSync, String source, String destination) {
 595         GroupInfo group = null;
 596         if (message.getGroupInfo().isPresent()) {
 597             SignalServiceGroup groupInfo = message.getGroupInfo().get();
 598             switch (groupInfo.getType()) {
 599                 case UPDATE:
 600                     try {
 601                         group = groupStore.getGroup(groupInfo.getGroupId());
 602                     } catch (GroupNotFoundException e) {
 603                         group = new GroupInfo(groupInfo.getGroupId());
 604                     }
 605
 606                     if (groupInfo.getAvatar().isPresent()) {
 607                         SignalServiceAttachment avatar = groupInfo.getAvatar().get();
 608                         if (avatar.isPointer()) {
 609                             long avatarId = avatar.asPointer().getId();
 610                             try {
 611                                 retrieveAttachment(avatar.asPointer());
 612                                 // TODO store group avatar in /avatar/groups folder
 613                                 group.avatarId = avatarId;
 614                             } catch (IOException | InvalidMessageException e) {
 615                                 System.err.println("Failed to retrieve group avatar (" + avatarId + "): " + e.getMessage());
 616                             }
 617                         }
 618                     }
 619
 620                     if (groupInfo.getName().isPresent()) {
 621                         group.name = groupInfo.getName().get();
 622                     }
 623
 624                     if (groupInfo.getMembers().isPresent()) {
 625                         group.members.addAll(groupInfo.getMembers().get());
 626                     }
 627
 628                     groupStore.updateGroup(group);
 629                     break;
 630                 case DELIVER:
 631                     try {
 632                         group = groupStore.getGroup(groupInfo.getGroupId());
 633                     } catch (GroupNotFoundException e) {
 634                     }
 635                     break;
 636                 case QUIT:
 637                     try {
 638                         group = groupStore.getGroup(groupInfo.getGroupId());
 639                         group.members.remove(source);
 640                     } catch (GroupNotFoundException e) {
 641                     }
 642                     break;
 643             }
 644         }
 645         if (message.isEndSession()) {
 646             handleEndSession(isSync ? destination : source);
 647         }
 648         if (message.getAttachments().isPresent()) {
 649             for (SignalServiceAttachment attachment : message.getAttachments().get()) {
 650                 if (attachment.isPointer()) {
 651                     try {
 652                         retrieveAttachment(attachment.asPointer());
 653                     } catch (IOException | InvalidMessageException e) {
 654                         System.err.println("Failed to retrieve attachment (" + attachment.asPointer().getId() + "): " + e.getMessage());
 655                     }
 656                 }
 657             }
 658         }
 659         return group;
 660     }
 661
 662     public void receiveMessages(int timeoutSeconds, boolean returnOnTimeout, ReceiveMessageHandler handler) throws IOException {
 663         final SignalServiceMessageReceiver messageReceiver = new SignalServiceMessageReceiver(URL, TRUST_STORE, username, password, deviceId, signalingKey, USER_AGENT);
 664         SignalServiceMessagePipe messagePipe = null;
 665
 666         try {
 667             messagePipe = messageReceiver.createMessagePipe();
 668
 669             while (true) {
 670                 SignalServiceEnvelope envelope;
 671                 SignalServiceContent content = null;
 672                 GroupInfo group = null;
 673                 try {
 674                     envelope = messagePipe.read(timeoutSeconds, TimeUnit.SECONDS);
 675                     if (!envelope.isReceipt()) {
 676                         content = decryptMessage(envelope);
 677                         if (content != null) {
 678                             if (content.getDataMessage().isPresent()) {
 679                                 SignalServiceDataMessage message = content.getDataMessage().get();
 680                                 group = handleSignalServiceDataMessage(message, false, envelope.getSource(), username);
 681                             }
 682                             if (content.getSyncMessage().isPresent()) {
 683                                 SignalServiceSyncMessage syncMessage = content.getSyncMessage().get();
 684                                 if (syncMessage.getSent().isPresent()) {
 685                                     SignalServiceDataMessage message = syncMessage.getSent().get().getMessage();
 686                                     group = handleSignalServiceDataMessage(message, true, envelope.getSource(), syncMessage.getSent().get().getDestination().get());
 687                                 }
 688                                 if (syncMessage.getRequest().isPresent()) {
 689                                     RequestMessage rm = syncMessage.getRequest().get();
 690                                     if (rm.isContactsRequest()) {
 691                                         // TODO implement when we have contacts
 692                                     }
 693                                     if (rm.isGroupsRequest()) {
 694                                         try {
 695                                             sendGroups();
 696                                         } catch (EncapsulatedExceptions encapsulatedExceptions) {
 697                                             encapsulatedExceptions.printStackTrace();
 698                                         } catch (UntrustedIdentityException e) {
 699                                             e.printStackTrace();
 700                                         }
 701                                     }
 702                                 }
 703                                 if (syncMessage.getGroups().isPresent()) {
 704                                     try {
 705                                         DeviceGroupsInputStream s = new DeviceGroupsInputStream(retrieveAttachmentAsStream(syncMessage.getGroups().get().asPointer()));
 706                                         DeviceGroup g;
 707                                         while ((g = s.read()) != null) {
 708                                             GroupInfo syncGroup;
 709                                             try {
 710                                                 syncGroup = groupStore.getGroup(g.getId());
 711                                             } catch (GroupNotFoundException e) {
 712                                                 syncGroup = new GroupInfo(g.getId());
 713                                             }
 714                                             if (g.getName().isPresent()) {
 715                                                 syncGroup.name = g.getName().get();
 716                                             }
 717                                             syncGroup.members.addAll(g.getMembers());
 718                                             syncGroup.active = g.isActive();
 719
 720                                             if (g.getAvatar().isPresent()) {
 721                                                 byte[] ava = new byte[(int) g.getAvatar().get().getLength()];
 722                                                 org.whispersystems.signalservice.internal.util.Util.readFully(g.getAvatar().get().getInputStream(), ava);
 723                                                 // TODO store group avatar in /avatar/groups folder
 724                                             }
 725                                             groupStore.updateGroup(syncGroup);
 726                                         }
 727                                     } catch (Exception e) {
 728                                         e.printStackTrace();
 729                                     }
 730                                 }
 731                                 if (syncMessage.getContacts().isPresent()) {
 732                                     try {
 733                                         DeviceContactsInputStream s = new DeviceContactsInputStream(retrieveAttachmentAsStream(syncMessage.getContacts().get().asPointer()));
 734                                         DeviceContact c;
 735                                         while ((c = s.read()) != null) {
 736                                             // TODO implement when we have contact storage
 737                                             if (c.getName().isPresent()) {
 738                                                 c.getName().get();
 739                                             }
 740                                             c.getNumber();
 741
 742                                             if (c.getAvatar().isPresent()) {
 743                                                 byte[] ava = new byte[(int) c.getAvatar().get().getLength()];
 744                                                 org.whispersystems.signalservice.internal.util.Util.readFully(c.getAvatar().get().getInputStream(), ava);
 745                                                 // TODO store contact avatar in /avatar/contacts folder
 746                                             }
 747                                         }
 748                                     } catch (Exception e) {
 749                                         e.printStackTrace();
 750                                     }
 751                                 }
 752                             }
 753                         }
 754                     }
 755                     save();
 756                     handler.handleMessage(envelope, content, group);
 757                 } catch (TimeoutException e) {
 758                     if (returnOnTimeout)
 759                         return;
 760                 } catch (InvalidVersionException e) {
 761                     System.err.println("Ignoring error: " + e.getMessage());
 762                 }
 763             }
 764         } finally {
 765             if (messagePipe != null)
 766                 messagePipe.shutdown();
 767         }
 768     }
 769
 770     public File getAttachmentFile(long attachmentId) {
 771         return new File(attachmentsPath, attachmentId + "");
 772     }
 773
 774     private File retrieveAttachment(SignalServiceAttachmentPointer pointer) throws IOException, InvalidMessageException {
 775         final SignalServiceMessageReceiver messageReceiver = new SignalServiceMessageReceiver(URL, TRUST_STORE, username, password, deviceId, signalingKey, USER_AGENT);
 776
 777         File tmpFile = File.createTempFile("ts_attach_" + pointer.getId(), ".tmp");
 778         InputStream input = messageReceiver.retrieveAttachment(pointer, tmpFile);
 779
 780         new File(attachmentsPath).mkdirs();
 781         File outputFile = getAttachmentFile(pointer.getId());
 782         OutputStream output = null;
 783         try {
 784             output = new FileOutputStream(outputFile);
 785             byte[] buffer = new byte[4096];
 786             int read;
 787
 788             while ((read = input.read(buffer)) != -1) {
 789                 output.write(buffer, 0, read);
 790             }
 791         } catch (FileNotFoundException e) {
 792             e.printStackTrace();
 793             return null;
 794         } finally {
 795             if (output != null) {
 796                 output.close();
 797                 output = null;
 798             }
 799             if (!tmpFile.delete()) {
 800                 System.err.println("Failed to delete temp file: " + tmpFile);
 801             }
 802         }
 803         if (pointer.getPreview().isPresent()) {
 804             File previewFile = new File(outputFile + ".preview");
 805             try {
 806                 output = new FileOutputStream(previewFile);
 807                 byte[] preview = pointer.getPreview().get();
 808                 output.write(preview, 0, preview.length);
 809             } catch (FileNotFoundException e) {
 810                 e.printStackTrace();
 811                 return null;
 812             } finally {
 813                 if (output != null) {
 814                     output.close();
 815                 }
 816             }
 817         }
 818         return outputFile;
 819     }
 820
 821     private InputStream retrieveAttachmentAsStream(SignalServiceAttachmentPointer pointer) throws IOException, InvalidMessageException {
 822         final SignalServiceMessageReceiver messageReceiver = new SignalServiceMessageReceiver(URL, TRUST_STORE, username, password, deviceId, signalingKey, USER_AGENT);
 823         File file = File.createTempFile("ts_tmp", "tmp");
 824         file.deleteOnExit();
 825
 826         return messageReceiver.retrieveAttachment(pointer, file);
 827     }
 828
 829     private String canonicalizeNumber(String number) throws InvalidNumberException {
 830         String localNumber = username;
 831         return PhoneNumberFormatter.formatNumber(number, localNumber);
 832     }
 833
 834     private SignalServiceAddress getPushAddress(String number) throws InvalidNumberException {
 835         String e164number = canonicalizeNumber(number);
 836         return new SignalServiceAddress(e164number);
 837     }
 838
 839     @Override
 840     public boolean isRemote() {
 841         return false;
 842     }
 843
 844     private void sendGroups() throws IOException, EncapsulatedExceptions, UntrustedIdentityException {
 845         File contactsFile = File.createTempFile("multidevice-contact-update", ".tmp");
 846
 847         try {
 848             DeviceGroupsOutputStream out = new DeviceGroupsOutputStream(new FileOutputStream(contactsFile));
 849             try {
 850                 for (GroupInfo record : groupStore.getGroups()) {
 851                     out.write(new DeviceGroup(record.groupId, Optional.fromNullable(record.name),
 852                             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)),
 853                             record.active));
 854                 }
 855             } finally {
 856                 out.close();
 857             }
 858
 859             if (contactsFile.exists() && contactsFile.length() > 0) {
 860                 FileInputStream contactsFileStream = new FileInputStream(contactsFile);
 861                 SignalServiceAttachmentStream attachmentStream = SignalServiceAttachment.newStreamBuilder()
 862                         .withStream(contactsFileStream)
 863                         .withContentType("application/octet-stream")
 864                         .withLength(contactsFile.length())
 865                         .build();
 866
 867                 sendMessage(SignalServiceSyncMessage.forGroups(attachmentStream));
 868             }
 869         } finally {
 870             if (contactsFile != null) contactsFile.delete();
 871         }
 872     }
 873 }