nmode's Git Repositories - signal-cli/blob - src/main/java/cli/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 cli;
  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.whispersystems.libaxolotl.*;
  27 import org.whispersystems.libaxolotl.ecc.Curve;
  28 import org.whispersystems.libaxolotl.ecc.ECKeyPair;
  29 import org.whispersystems.libaxolotl.state.PreKeyRecord;
  30 import org.whispersystems.libaxolotl.state.SignedPreKeyRecord;
  31 import org.whispersystems.libaxolotl.util.KeyHelper;
  32 import org.whispersystems.libaxolotl.util.Medium;
  33 import org.whispersystems.libaxolotl.util.guava.Optional;
  34 import org.whispersystems.textsecure.api.TextSecureAccountManager;
  35 import org.whispersystems.textsecure.api.TextSecureMessagePipe;
  36 import org.whispersystems.textsecure.api.TextSecureMessageReceiver;
  37 import org.whispersystems.textsecure.api.TextSecureMessageSender;
  38 import org.whispersystems.textsecure.api.crypto.TextSecureCipher;
  39 import org.whispersystems.textsecure.api.messages.*;
  40 import org.whispersystems.textsecure.api.push.TextSecureAddress;
  41 import org.whispersystems.textsecure.api.push.TrustStore;
  42 import org.whispersystems.textsecure.api.push.exceptions.EncapsulatedExceptions;
  43 import org.whispersystems.textsecure.api.util.InvalidNumberException;
  44 import org.whispersystems.textsecure.api.util.PhoneNumberFormatter;
  45
  46 import java.io.*;
  47 import java.nio.file.Files;
  48 import java.nio.file.Paths;
  49 import java.util.*;
  50 import java.util.concurrent.TimeUnit;
  51 import java.util.concurrent.TimeoutException;
  52
  53 class Manager implements TextSecure {
  54     private final static String URL = "https://textsecure-service.whispersystems.org";
  55     private final static TrustStore TRUST_STORE = new WhisperTrustStore();
  56
  57     public final static String PROJECT_NAME = Manager.class.getPackage().getImplementationTitle();
  58     public final static String PROJECT_VERSION = Manager.class.getPackage().getImplementationVersion();
  59     private final static String USER_AGENT = PROJECT_NAME + " " + PROJECT_VERSION;
  60
  61     private final static String settingsPath = System.getProperty("user.home") + "/.config/textsecure";
  62     private final static String dataPath = settingsPath + "/data";
  63     private final static String attachmentsPath = settingsPath + "/attachments";
  64
  65     private final ObjectMapper jsonProcessot = new ObjectMapper();
  66     private String username;
  67     private String password;
  68     private String signalingKey;
  69     private int preKeyIdOffset;
  70     private int nextSignedPreKeyId;
  71
  72     private boolean registered = false;
  73
  74     private JsonAxolotlStore axolotlStore;
  75     private TextSecureAccountManager accountManager;
  76     private JsonGroupStore groupStore;
  77
  78     public Manager(String username) {
  79         this.username = username;
  80         jsonProcessot.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.NONE); // disable autodetect
  81         jsonProcessot.enable(SerializationFeature.INDENT_OUTPUT); // for pretty print, you can disable it.
  82         jsonProcessot.enable(SerializationFeature.WRITE_NULL_MAP_VALUES);
  83         jsonProcessot.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
  84     }
  85
  86     public String getFileName() {
  87         new File(dataPath).mkdirs();
  88         return dataPath + "/" + username;
  89     }
  90
  91     public boolean userExists() {
  92         File f = new File(getFileName());
  93         return !(!f.exists() || f.isDirectory());
  94     }
  95
  96     public boolean userHasKeys() {
  97         return axolotlStore != null;
  98     }
  99
 100     private JsonNode getNotNullNode(JsonNode parent, String name) throws InvalidObjectException {
 101         JsonNode node = parent.get(name);
 102         if (node == null) {
 103             throw new InvalidObjectException(String.format("Incorrect file format: expected parameter %s not found ", name));
 104         }
 105
 106         return node;
 107     }
 108
 109     public void load() throws IOException, InvalidKeyException {
 110         JsonNode rootNode = jsonProcessot.readTree(new File(getFileName()));
 111
 112         username = getNotNullNode(rootNode, "username").asText();
 113         password = getNotNullNode(rootNode, "password").asText();
 114         if (rootNode.has("signalingKey")) {
 115             signalingKey = getNotNullNode(rootNode, "signalingKey").asText();
 116         }
 117         if (rootNode.has("preKeyIdOffset")) {
 118             preKeyIdOffset = getNotNullNode(rootNode, "preKeyIdOffset").asInt(0);
 119         } else {
 120             preKeyIdOffset = 0;
 121         }
 122         if (rootNode.has("nextSignedPreKeyId")) {
 123             nextSignedPreKeyId = getNotNullNode(rootNode, "nextSignedPreKeyId").asInt();
 124         } else {
 125             nextSignedPreKeyId = 0;
 126         }
 127         axolotlStore = jsonProcessot.convertValue(getNotNullNode(rootNode, "axolotlStore"), JsonAxolotlStore.class); //new JsonAxolotlStore(in.getJSONObject("axolotlStore"));
 128         registered = getNotNullNode(rootNode, "registered").asBoolean();
 129         JsonNode groupStoreNode = rootNode.get("groupStore");
 130         if (groupStoreNode != null) {
 131             groupStore = jsonProcessot.convertValue(groupStoreNode, JsonGroupStore.class);
 132         }
 133         if (groupStore == null) {
 134             groupStore = new JsonGroupStore();
 135         }
 136         accountManager = new TextSecureAccountManager(URL, TRUST_STORE, username, password, USER_AGENT);
 137     }
 138
 139     private void save() {
 140         ObjectNode rootNode = jsonProcessot.createObjectNode();
 141         rootNode.put("username", username)
 142                 .put("password", password)
 143                 .put("signalingKey", signalingKey)
 144                 .put("preKeyIdOffset", preKeyIdOffset)
 145                 .put("nextSignedPreKeyId", nextSignedPreKeyId)
 146                 .put("registered", registered)
 147                 .putPOJO("axolotlStore", axolotlStore)
 148                 .putPOJO("groupStore", groupStore)
 149         ;
 150         try {
 151             jsonProcessot.writeValue(new File(getFileName()), rootNode);
 152         } catch (Exception e) {
 153             System.err.println(String.format("Error saving file: %s", e.getMessage()));
 154         }
 155     }
 156
 157     public void createNewIdentity() {
 158         IdentityKeyPair identityKey = KeyHelper.generateIdentityKeyPair();
 159         int registrationId = KeyHelper.generateRegistrationId(false);
 160         axolotlStore = new JsonAxolotlStore(identityKey, registrationId);
 161         groupStore = new JsonGroupStore();
 162         registered = false;
 163         save();
 164     }
 165
 166     public boolean isRegistered() {
 167         return registered;
 168     }
 169
 170     public void register(boolean voiceVerication) throws IOException {
 171         password = Util.getSecret(18);
 172
 173         accountManager = new TextSecureAccountManager(URL, TRUST_STORE, username, password, USER_AGENT);
 174
 175         if (voiceVerication)
 176             accountManager.requestVoiceVerificationCode();
 177         else
 178             accountManager.requestSmsVerificationCode();
 179
 180         registered = false;
 181         save();
 182     }
 183
 184     private static final int BATCH_SIZE = 100;
 185
 186     private List<PreKeyRecord> generatePreKeys() {
 187         List<PreKeyRecord> records = new LinkedList<>();
 188
 189         for (int i = 0; i < BATCH_SIZE; i++) {
 190             int preKeyId = (preKeyIdOffset + i) % Medium.MAX_VALUE;
 191             ECKeyPair keyPair = Curve.generateKeyPair();
 192             PreKeyRecord record = new PreKeyRecord(preKeyId, keyPair);
 193
 194             axolotlStore.storePreKey(preKeyId, record);
 195             records.add(record);
 196         }
 197
 198         preKeyIdOffset = (preKeyIdOffset + BATCH_SIZE + 1) % Medium.MAX_VALUE;
 199         save();
 200
 201         return records;
 202     }
 203
 204     private PreKeyRecord generateLastResortPreKey() {
 205         if (axolotlStore.containsPreKey(Medium.MAX_VALUE)) {
 206             try {
 207                 return axolotlStore.loadPreKey(Medium.MAX_VALUE);
 208             } catch (InvalidKeyIdException e) {
 209                 axolotlStore.removePreKey(Medium.MAX_VALUE);
 210             }
 211         }
 212
 213         ECKeyPair keyPair = Curve.generateKeyPair();
 214         PreKeyRecord record = new PreKeyRecord(Medium.MAX_VALUE, keyPair);
 215
 216         axolotlStore.storePreKey(Medium.MAX_VALUE, record);
 217         save();
 218
 219         return record;
 220     }
 221
 222     private SignedPreKeyRecord generateSignedPreKey(IdentityKeyPair identityKeyPair) {
 223         try {
 224             ECKeyPair keyPair = Curve.generateKeyPair();
 225             byte[] signature = Curve.calculateSignature(identityKeyPair.getPrivateKey(), keyPair.getPublicKey().serialize());
 226             SignedPreKeyRecord record = new SignedPreKeyRecord(nextSignedPreKeyId, System.currentTimeMillis(), keyPair, signature);
 227
 228             axolotlStore.storeSignedPreKey(nextSignedPreKeyId, record);
 229             nextSignedPreKeyId = (nextSignedPreKeyId + 1) % Medium.MAX_VALUE;
 230             save();
 231
 232             return record;
 233         } catch (InvalidKeyException e) {
 234             throw new AssertionError(e);
 235         }
 236     }
 237
 238     public void verifyAccount(String verificationCode) throws IOException {
 239         verificationCode = verificationCode.replace("-", "");
 240         signalingKey = Util.getSecret(52);
 241         accountManager.verifyAccountWithCode(verificationCode, signalingKey, axolotlStore.getLocalRegistrationId(), false);
 242
 243         //accountManager.setGcmId(Optional.of(GoogleCloudMessaging.getInstance(this).register(REGISTRATION_ID)));
 244         registered = true;
 245
 246         List<PreKeyRecord> oneTimePreKeys = generatePreKeys();
 247
 248         PreKeyRecord lastResortKey = generateLastResortPreKey();
 249
 250         SignedPreKeyRecord signedPreKeyRecord = generateSignedPreKey(axolotlStore.getIdentityKeyPair());
 251
 252         accountManager.setPreKeys(axolotlStore.getIdentityKeyPair().getPublicKey(), lastResortKey, signedPreKeyRecord, oneTimePreKeys);
 253         save();
 254     }
 255
 256
 257     private static List<TextSecureAttachment> getTextSecureAttachments(List<String> attachments) throws AttachmentInvalidException {
 258         List<TextSecureAttachment> textSecureAttachments = null;
 259         if (attachments != null) {
 260             textSecureAttachments = new ArrayList<>(attachments.size());
 261             for (String attachment : attachments) {
 262                 try {
 263                     textSecureAttachments.add(createAttachment(attachment));
 264                 } catch (IOException e) {
 265                     throw new AttachmentInvalidException(attachment, e);
 266                 }
 267             }
 268         }
 269         return textSecureAttachments;
 270     }
 271
 272     private static TextSecureAttachmentStream createAttachment(String attachment) throws IOException {
 273         File attachmentFile = new File(attachment);
 274         InputStream attachmentStream = new FileInputStream(attachmentFile);
 275         final long attachmentSize = attachmentFile.length();
 276         String mime = Files.probeContentType(Paths.get(attachment));
 277         return new TextSecureAttachmentStream(attachmentStream, mime, attachmentSize, null);
 278     }
 279
 280     @Override
 281     public void sendGroupMessage(String messageText, List<String> attachments,
 282                                  byte[] groupId)
 283             throws IOException, EncapsulatedExceptions, GroupNotFoundException, AttachmentInvalidException {
 284         final TextSecureDataMessage.Builder messageBuilder = TextSecureDataMessage.newBuilder().withBody(messageText);
 285         if (attachments != null) {
 286             messageBuilder.withAttachments(getTextSecureAttachments(attachments));
 287         }
 288         if (groupId != null) {
 289             TextSecureGroup group = TextSecureGroup.newBuilder(TextSecureGroup.Type.DELIVER)
 290                     .withId(groupId)
 291                     .build();
 292             messageBuilder.asGroupMessage(group);
 293         }
 294         TextSecureDataMessage message = messageBuilder.build();
 295
 296         sendMessage(message, groupStore.getGroup(groupId).members);
 297     }
 298
 299     public void sendQuitGroupMessage(byte[] groupId) throws GroupNotFoundException, IOException, EncapsulatedExceptions {
 300         TextSecureGroup group = TextSecureGroup.newBuilder(TextSecureGroup.Type.QUIT)
 301                 .withId(groupId)
 302                 .build();
 303
 304         TextSecureDataMessage message = TextSecureDataMessage.newBuilder()
 305                 .asGroupMessage(group)
 306                 .build();
 307
 308         sendMessage(message, groupStore.getGroup(groupId).members);
 309     }
 310
 311     public byte[] sendUpdateGroupMessage(byte[] groupId, String name, Collection<String> members, String avatarFile) throws IOException, EncapsulatedExceptions, GroupNotFoundException, AttachmentInvalidException {
 312         GroupInfo g;
 313         if (groupId == null) {
 314             // Create new group
 315             g = new GroupInfo(Util.getSecretBytes(16));
 316             g.members.add(username);
 317         } else {
 318             g = groupStore.getGroup(groupId);
 319         }
 320
 321         if (name != null) {
 322             g.name = name;
 323         }
 324
 325         if (members != null) {
 326             for (String member : members) {
 327                 try {
 328                     g.members.add(canonicalizeNumber(member));
 329                 } catch (InvalidNumberException e) {
 330                     System.err.println("Failed to add member \"" + member + "\" to group: " + e.getMessage());
 331                     System.err.println("Aborting…");
 332                     System.exit(1);
 333                 }
 334             }
 335         }
 336
 337         TextSecureGroup.Builder group = TextSecureGroup.newBuilder(TextSecureGroup.Type.UPDATE)
 338                 .withId(g.groupId)
 339                 .withName(g.name)
 340                 .withMembers(new ArrayList<>(g.members));
 341
 342         if (avatarFile != null) {
 343             try {
 344                 group.withAvatar(createAttachment(avatarFile));
 345                 // TODO
 346                 g.avatarId = 0;
 347             } catch (IOException e) {
 348                 throw new AttachmentInvalidException(avatarFile, e);
 349             }
 350         }
 351
 352         groupStore.updateGroup(g);
 353
 354         TextSecureDataMessage message = TextSecureDataMessage.newBuilder()
 355                 .asGroupMessage(group.build())
 356                 .build();
 357
 358         sendMessage(message, g.members);
 359         return g.groupId;
 360     }
 361
 362     @Override
 363     public void sendMessage(String message, List<String> attachments, String recipient)
 364             throws EncapsulatedExceptions, AttachmentInvalidException, IOException {
 365         List<String> recipients = new ArrayList<>(1);
 366         recipients.add(recipient);
 367         sendMessage(message, attachments, recipients);
 368     }
 369
 370     public void sendMessage(String messageText, List<String> attachments,
 371                             Collection<String> recipients)
 372             throws IOException, EncapsulatedExceptions, AttachmentInvalidException {
 373         final TextSecureDataMessage.Builder messageBuilder = TextSecureDataMessage.newBuilder().withBody(messageText);
 374         if (attachments != null) {
 375             messageBuilder.withAttachments(getTextSecureAttachments(attachments));
 376         }
 377         TextSecureDataMessage message = messageBuilder.build();
 378
 379         sendMessage(message, recipients);
 380     }
 381
 382     public void sendEndSessionMessage(List<String> recipients) throws IOException, EncapsulatedExceptions {
 383         TextSecureDataMessage message = TextSecureDataMessage.newBuilder()
 384                 .asEndSessionMessage()
 385                 .build();
 386
 387         sendMessage(message, recipients);
 388     }
 389
 390     private void sendMessage(TextSecureDataMessage message, Collection<String> recipients)
 391             throws IOException, EncapsulatedExceptions {
 392         TextSecureMessageSender messageSender = new TextSecureMessageSender(URL, TRUST_STORE, username, password,
 393                 axolotlStore, USER_AGENT, Optional.<TextSecureMessageSender.EventListener>absent());
 394
 395         Set<TextSecureAddress> recipientsTS = new HashSet<>(recipients.size());
 396         for (String recipient : recipients) {
 397             try {
 398                 recipientsTS.add(getPushAddress(recipient));
 399             } catch (InvalidNumberException e) {
 400                 System.err.println("Failed to add recipient \"" + recipient + "\": " + e.getMessage());
 401                 System.err.println("Aborting sending.");
 402                 save();
 403                 return;
 404             }
 405         }
 406
 407         messageSender.sendMessage(new ArrayList<>(recipientsTS), message);
 408
 409         if (message.isEndSession()) {
 410             for (TextSecureAddress recipient : recipientsTS) {
 411                 handleEndSession(recipient.getNumber());
 412             }
 413         }
 414         save();
 415     }
 416
 417     private TextSecureContent decryptMessage(TextSecureEnvelope envelope) {
 418         TextSecureCipher cipher = new TextSecureCipher(new TextSecureAddress(username), axolotlStore);
 419         try {
 420             return cipher.decrypt(envelope);
 421         } catch (Exception e) {
 422             // TODO handle all exceptions
 423             e.printStackTrace();
 424             return null;
 425         }
 426     }
 427
 428     private void handleEndSession(String source) {
 429         axolotlStore.deleteAllSessions(source);
 430     }
 431
 432     public interface ReceiveMessageHandler {
 433         void handleMessage(TextSecureEnvelope envelope, TextSecureContent decryptedContent, GroupInfo group);
 434     }
 435
 436     public void receiveMessages(int timeoutSeconds, boolean returnOnTimeout, ReceiveMessageHandler handler) throws IOException {
 437         final TextSecureMessageReceiver messageReceiver = new TextSecureMessageReceiver(URL, TRUST_STORE, username, password, signalingKey, USER_AGENT);
 438         TextSecureMessagePipe messagePipe = null;
 439
 440         try {
 441             messagePipe = messageReceiver.createMessagePipe();
 442
 443             while (true) {
 444                 TextSecureEnvelope envelope;
 445                 TextSecureContent content = null;
 446                 GroupInfo group = null;
 447                 try {
 448                     envelope = messagePipe.read(timeoutSeconds, TimeUnit.SECONDS);
 449                     if (!envelope.isReceipt()) {
 450                         content = decryptMessage(envelope);
 451                         if (content != null) {
 452                             if (content.getDataMessage().isPresent()) {
 453                                 TextSecureDataMessage message = content.getDataMessage().get();
 454                                 if (message.getGroupInfo().isPresent()) {
 455                                     TextSecureGroup groupInfo = message.getGroupInfo().get();
 456                                     switch (groupInfo.getType()) {
 457                                         case UPDATE:
 458                                             try {
 459                                                 group = groupStore.getGroup(groupInfo.getGroupId());
 460                                             } catch (GroupNotFoundException e) {
 461                                                 group = new GroupInfo(groupInfo.getGroupId());
 462                                             }
 463
 464                                             if (groupInfo.getAvatar().isPresent()) {
 465                                                 TextSecureAttachment avatar = groupInfo.getAvatar().get();
 466                                                 if (avatar.isPointer()) {
 467                                                     long avatarId = avatar.asPointer().getId();
 468                                                     try {
 469                                                         retrieveAttachment(avatar.asPointer());
 470                                                         group.avatarId = avatarId;
 471                                                     } catch (IOException | InvalidMessageException e) {
 472                                                         System.err.println("Failed to retrieve group avatar (" + avatarId + "): " + e.getMessage());
 473                                                     }
 474                                                 }
 475                                             }
 476
 477                                             if (groupInfo.getName().isPresent()) {
 478                                                 group.name = groupInfo.getName().get();
 479                                             }
 480
 481                                             if (groupInfo.getMembers().isPresent()) {
 482                                                 group.members.addAll(groupInfo.getMembers().get());
 483                                             }
 484
 485                                             groupStore.updateGroup(group);
 486                                             break;
 487                                         case DELIVER:
 488                                             try {
 489                                                 group = groupStore.getGroup(groupInfo.getGroupId());
 490                                             } catch (GroupNotFoundException e) {
 491                                             }
 492                                             break;
 493                                         case QUIT:
 494                                             try {
 495                                                 group = groupStore.getGroup(groupInfo.getGroupId());
 496                                                 group.members.remove(envelope.getSource());
 497                                             } catch (GroupNotFoundException e) {
 498                                             }
 499                                             break;
 500                                     }
 501                                 }
 502                                 if (message.isEndSession()) {
 503                                     handleEndSession(envelope.getSource());
 504                                 }
 505                                 if (message.getAttachments().isPresent()) {
 506                                     for (TextSecureAttachment attachment : message.getAttachments().get()) {
 507                                         if (attachment.isPointer()) {
 508                                             try {
 509                                                 retrieveAttachment(attachment.asPointer());
 510                                             } catch (IOException | InvalidMessageException e) {
 511                                                 System.err.println("Failed to retrieve attachment (" + attachment.asPointer().getId() + "): " + e.getMessage());
 512                                             }
 513                                         }
 514                                     }
 515                                 }
 516                             }
 517                         }
 518                     }
 519                     save();
 520                     handler.handleMessage(envelope, content, group);
 521                 } catch (TimeoutException e) {
 522                     if (returnOnTimeout)
 523                         return;
 524                 } catch (InvalidVersionException e) {
 525                     System.err.println("Ignoring error: " + e.getMessage());
 526                 }
 527             }
 528         } finally {
 529             if (messagePipe != null)
 530                 messagePipe.shutdown();
 531         }
 532     }
 533
 534     public File getAttachmentFile(long attachmentId) {
 535         return new File(attachmentsPath + "/" + attachmentId);
 536     }
 537
 538     private File retrieveAttachment(TextSecureAttachmentPointer pointer) throws IOException, InvalidMessageException {
 539         final TextSecureMessageReceiver messageReceiver = new TextSecureMessageReceiver(URL, TRUST_STORE, username, password, signalingKey, USER_AGENT);
 540
 541         File tmpFile = File.createTempFile("ts_attach_" + pointer.getId(), ".tmp");
 542         InputStream input = messageReceiver.retrieveAttachment(pointer, tmpFile);
 543
 544         new File(attachmentsPath).mkdirs();
 545         File outputFile = getAttachmentFile(pointer.getId());
 546         OutputStream output = null;
 547         try {
 548             output = new FileOutputStream(outputFile);
 549             byte[] buffer = new byte[4096];
 550             int read;
 551
 552             while ((read = input.read(buffer)) != -1) {
 553                 output.write(buffer, 0, read);
 554             }
 555         } catch (FileNotFoundException e) {
 556             e.printStackTrace();
 557             return null;
 558         } finally {
 559             if (output != null) {
 560                 output.close();
 561                 output = null;
 562             }
 563             if (!tmpFile.delete()) {
 564                 System.err.println("Failed to delete temp file: " + tmpFile);
 565             }
 566         }
 567         if (pointer.getPreview().isPresent()) {
 568             File previewFile = new File(outputFile + ".preview");
 569             try {
 570                 output = new FileOutputStream(previewFile);
 571                 byte[] preview = pointer.getPreview().get();
 572                 output.write(preview, 0, preview.length);
 573             } catch (FileNotFoundException e) {
 574                 e.printStackTrace();
 575                 return null;
 576             } finally {
 577                 if (output != null) {
 578                     output.close();
 579                 }
 580             }
 581         }
 582         return outputFile;
 583     }
 584
 585     private String canonicalizeNumber(String number) throws InvalidNumberException {
 586         String localNumber = username;
 587         return PhoneNumberFormatter.formatNumber(number, localNumber);
 588     }
 589
 590     private TextSecureAddress getPushAddress(String number) throws InvalidNumberException {
 591         String e164number = canonicalizeNumber(number);
 592         return new TextSecureAddress(e164number);
 593     }
 594
 595     @Override
 596     public boolean isRemote() {
 597         return false;
 598     }
 599 }