nmode's Git Repositories - signal-cli/blob - src/main/java/org/asamk/signal/Main.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 net.sourceforge.argparse4j.ArgumentParsers;
  20 import net.sourceforge.argparse4j.impl.Arguments;
  21 import net.sourceforge.argparse4j.inf.*;
  22 import org.apache.commons.io.IOUtils;
  23 import org.apache.http.util.TextUtils;
  24 import org.asamk.Signal;
  25 import org.freedesktop.dbus.DBusConnection;
  26 import org.freedesktop.dbus.exceptions.DBusException;
  27 import org.freedesktop.dbus.exceptions.DBusExecutionException;
  28 import org.whispersystems.signalservice.api.crypto.UntrustedIdentityException;
  29 import org.whispersystems.signalservice.api.messages.*;
  30 import org.whispersystems.signalservice.api.messages.multidevice.SignalServiceSyncMessage;
  31 import org.whispersystems.signalservice.api.push.SignalServiceAddress;
  32 import org.whispersystems.signalservice.api.push.exceptions.EncapsulatedExceptions;
  33 import org.whispersystems.signalservice.api.push.exceptions.NetworkFailureException;
  34 import org.whispersystems.signalservice.api.push.exceptions.UnregisteredUserException;
  35 import org.whispersystems.signalservice.api.util.PhoneNumberFormatter;
  36
  37 import java.io.File;
  38 import java.io.IOException;
  39 import java.security.Security;
  40 import java.util.ArrayList;
  41 import java.util.List;
  42
  43 public class Main {
  44
  45     public static final String SIGNAL_BUSNAME = "org.asamk.Signal";
  46     public static final String SIGNAL_OBJECTPATH = "/org/asamk/Signal";
  47
  48     public static void main(String[] args) {
  49         // Workaround for BKS truststore
  50         Security.insertProviderAt(new org.spongycastle.jce.provider.BouncyCastleProvider(), 1);
  51
  52         Namespace ns = parseArgs(args);
  53         if (ns == null) {
  54             System.exit(1);
  55         }
  56
  57         final String username = ns.getString("username");
  58         Manager m;
  59         Signal ts;
  60         DBusConnection dBusConn = null;
  61         try {
  62             if (ns.getBoolean("dbus") || ns.getBoolean("dbus_system")) {
  63                 try {
  64                     m = null;
  65                     int busType;
  66                     if (ns.getBoolean("dbus_system")) {
  67                         busType = DBusConnection.SYSTEM;
  68                     } else {
  69                         busType = DBusConnection.SESSION;
  70                     }
  71                     dBusConn = DBusConnection.getConnection(busType);
  72                     ts = (Signal) dBusConn.getRemoteObject(
  73                             SIGNAL_BUSNAME, SIGNAL_OBJECTPATH,
  74                             Signal.class);
  75                 } catch (DBusException e) {
  76                     e.printStackTrace();
  77                     if (dBusConn != null) {
  78                         dBusConn.disconnect();
  79                     }
  80                     System.exit(3);
  81                     return;
  82                 }
  83             } else {
  84                 String settingsPath = ns.getString("config");
  85                 if (TextUtils.isEmpty(settingsPath)) {
  86                     settingsPath = System.getProperty("user.home") + "/.config/signal";
  87                     if (!new File(settingsPath).exists()) {
  88                         String legacySettingsPath = System.getProperty("user.home") + "/.config/textsecure";
  89                         if (new File(legacySettingsPath).exists()) {
  90                             settingsPath = legacySettingsPath;
  91                         }
  92                     }
  93                 }
  94
  95                 m = new Manager(username, settingsPath);
  96                 ts = m;
  97                 if (m.userExists()) {
  98                     try {
  99                         m.load();
 100                     } catch (Exception e) {
 101                         System.err.println("Error loading state file \"" + m.getFileName() + "\": " + e.getMessage());
 102                         System.exit(2);
 103                         return;
 104                     }
 105                 }
 106             }
 107
 108             switch (ns.getString("command")) {
 109                 case "register":
 110                     if (dBusConn != null) {
 111                         System.err.println("register is not yet implementd via dbus");
 112                         System.exit(1);
 113                     }
 114                     if (!m.userHasKeys()) {
 115                         m.createNewIdentity();
 116                     }
 117                     try {
 118                         m.register(ns.getBoolean("voice"));
 119                     } catch (IOException e) {
 120                         System.err.println("Request verify error: " + e.getMessage());
 121                         System.exit(3);
 122                     }
 123                     break;
 124                 case "verify":
 125                     if (dBusConn != null) {
 126                         System.err.println("verify is not yet implementd via dbus");
 127                         System.exit(1);
 128                     }
 129                     if (!m.userHasKeys()) {
 130                         System.err.println("User has no keys, first call register.");
 131                         System.exit(1);
 132                     }
 133                     if (m.isRegistered()) {
 134                         System.err.println("User registration is already verified");
 135                         System.exit(1);
 136                     }
 137                     try {
 138                         m.verifyAccount(ns.getString("verificationCode"));
 139                     } catch (IOException e) {
 140                         System.err.println("Verify error: " + e.getMessage());
 141                         System.exit(3);
 142                     }
 143                     break;
 144                 case "send":
 145                     if (dBusConn == null && !m.isRegistered()) {
 146                         System.err.println("User is not registered.");
 147                         System.exit(1);
 148                     }
 149
 150                     if (ns.getBoolean("endsession")) {
 151                         if (ns.getList("recipient") == null) {
 152                             System.err.println("No recipients given");
 153                             System.err.println("Aborting sending.");
 154                             System.exit(1);
 155                         }
 156                         try {
 157                             ts.sendEndSessionMessage(ns.<String>getList("recipient"));
 158                         } catch (IOException e) {
 159                             handleIOException(e);
 160                         } catch (EncapsulatedExceptions e) {
 161                             handleEncapsulatedExceptions(e);
 162                         } catch (AssertionError e) {
 163                             handleAssertionError(e);
 164                         } catch (DBusExecutionException e) {
 165                             handleDBusExecutionException(e);
 166                         }
 167                     } else {
 168                         String messageText = ns.getString("message");
 169                         if (messageText == null) {
 170                             try {
 171                                 messageText = IOUtils.toString(System.in);
 172                             } catch (IOException e) {
 173                                 System.err.println("Failed to read message from stdin: " + e.getMessage());
 174                                 System.err.println("Aborting sending.");
 175                                 System.exit(1);
 176                             }
 177                         }
 178
 179                         try {
 180                             List<String> attachments = ns.getList("attachment");
 181                             if (attachments == null) {
 182                                 attachments = new ArrayList<>();
 183                             }
 184                             if (ns.getString("group") != null) {
 185                                 byte[] groupId = decodeGroupId(ns.getString("group"));
 186                                 ts.sendGroupMessage(messageText, attachments, groupId);
 187                             } else {
 188                                 ts.sendMessage(messageText, attachments, ns.<String>getList("recipient"));
 189                             }
 190                         } catch (IOException e) {
 191                             handleIOException(e);
 192                         } catch (EncapsulatedExceptions e) {
 193                             handleEncapsulatedExceptions(e);
 194                         } catch (AssertionError e) {
 195                             handleAssertionError(e);
 196                         } catch (GroupNotFoundException e) {
 197                             handleGroupNotFoundException(e);
 198                         } catch (AttachmentInvalidException e) {
 199                             System.err.println("Failed to add attachment: " + e.getMessage());
 200                             System.err.println("Aborting sending.");
 201                             System.exit(1);
 202                         } catch (DBusExecutionException e) {
 203                             handleDBusExecutionException(e);
 204                         }
 205                     }
 206
 207                     break;
 208                 case "receive":
 209                     if (dBusConn != null) {
 210                         System.err.println("receive is not yet implementd via dbus");
 211                         System.exit(1);
 212                     }
 213                     if (!m.isRegistered()) {
 214                         System.err.println("User is not registered.");
 215                         System.exit(1);
 216                     }
 217                     int timeout = 5;
 218                     if (ns.getInt("timeout") != null) {
 219                         timeout = ns.getInt("timeout");
 220                     }
 221                     boolean returnOnTimeout = true;
 222                     if (timeout < 0) {
 223                         returnOnTimeout = false;
 224                         timeout = 3600;
 225                     }
 226                     try {
 227                         m.receiveMessages(timeout, returnOnTimeout, new ReceiveMessageHandler(m));
 228                     } catch (IOException e) {
 229                         System.err.println("Error while receiving messages: " + e.getMessage());
 230                         System.exit(3);
 231                     } catch (AssertionError e) {
 232                         handleAssertionError(e);
 233                     }
 234                     break;
 235                 case "quitGroup":
 236                     if (dBusConn != null) {
 237                         System.err.println("quitGroup is not yet implementd via dbus");
 238                         System.exit(1);
 239                     }
 240                     if (!m.isRegistered()) {
 241                         System.err.println("User is not registered.");
 242                         System.exit(1);
 243                     }
 244
 245                     try {
 246                         m.sendQuitGroupMessage(decodeGroupId(ns.getString("group")));
 247                     } catch (IOException e) {
 248                         handleIOException(e);
 249                     } catch (EncapsulatedExceptions e) {
 250                         handleEncapsulatedExceptions(e);
 251                     } catch (AssertionError e) {
 252                         handleAssertionError(e);
 253                     } catch (GroupNotFoundException e) {
 254                         handleGroupNotFoundException(e);
 255                     }
 256
 257                     break;
 258                 case "updateGroup":
 259                     if (dBusConn != null) {
 260                         System.err.println("updateGroup is not yet implementd via dbus");
 261                         System.exit(1);
 262                     }
 263                     if (!m.isRegistered()) {
 264                         System.err.println("User is not registered.");
 265                         System.exit(1);
 266                     }
 267
 268                     try {
 269                         byte[] groupId = null;
 270                         if (ns.getString("group") != null) {
 271                             groupId = decodeGroupId(ns.getString("group"));
 272                         }
 273                         byte[] newGroupId = m.sendUpdateGroupMessage(groupId, ns.getString("name"), ns.<String>getList("member"), ns.getString("avatar"));
 274                         if (groupId == null) {
 275                             System.out.println("Creating new group \"" + Base64.encodeBytes(newGroupId) + "\" …");
 276                         }
 277                     } catch (IOException e) {
 278                         handleIOException(e);
 279                     } catch (AttachmentInvalidException e) {
 280                         System.err.println("Failed to add avatar attachment for group\": " + e.getMessage());
 281                         System.err.println("Aborting sending.");
 282                         System.exit(1);
 283                     } catch (GroupNotFoundException e) {
 284                         handleGroupNotFoundException(e);
 285                     } catch (EncapsulatedExceptions e) {
 286                         handleEncapsulatedExceptions(e);
 287                     }
 288
 289                     break;
 290                 case "daemon":
 291                     if (dBusConn != null) {
 292                         System.err.println("Stop it.");
 293                         System.exit(1);
 294                     }
 295                     if (!m.isRegistered()) {
 296                         System.err.println("User is not registered.");
 297                         System.exit(1);
 298                     }
 299                     DBusConnection conn = null;
 300                     try {
 301                         try {
 302                             int busType;
 303                             if (ns.getBoolean("system")) {
 304                                 busType = DBusConnection.SYSTEM;
 305                             } else {
 306                                 busType = DBusConnection.SESSION;
 307                             }
 308                             conn = DBusConnection.getConnection(busType);
 309                             conn.exportObject(SIGNAL_OBJECTPATH, m);
 310                             conn.requestBusName(SIGNAL_BUSNAME);
 311                         } catch (DBusException e) {
 312                             e.printStackTrace();
 313                             System.exit(3);
 314                         }
 315                         try {
 316                             m.receiveMessages(3600, false, new DbusReceiveMessageHandler(m, conn));
 317                         } catch (IOException e) {
 318                             System.err.println("Error while receiving messages: " + e.getMessage());
 319                             System.exit(3);
 320                         } catch (AssertionError e) {
 321                             handleAssertionError(e);
 322                         }
 323                     } finally {
 324                         if (conn != null) {
 325                             conn.disconnect();
 326                         }
 327                     }
 328
 329                     break;
 330             }
 331             System.exit(0);
 332         } finally {
 333             if (dBusConn != null) {
 334                 dBusConn.disconnect();
 335             }
 336         }
 337     }
 338
 339     private static void handleGroupNotFoundException(GroupNotFoundException e) {
 340         System.err.println("Failed to send to group: " + e.getMessage());
 341         System.err.println("Aborting sending.");
 342         System.exit(1);
 343     }
 344
 345     private static void handleDBusExecutionException(DBusExecutionException e) {
 346         System.err.println("Cannot connect to dbus: " + e.getMessage());
 347         System.err.println("Aborting.");
 348         System.exit(1);
 349     }
 350
 351     private static byte[] decodeGroupId(String groupId) {
 352         try {
 353             return Base64.decode(groupId);
 354         } catch (IOException e) {
 355             System.err.println("Failed to decode groupId (must be base64) \"" + groupId + "\": " + e.getMessage());
 356             System.err.println("Aborting sending.");
 357             System.exit(1);
 358             return null;
 359         }
 360     }
 361
 362     private static Namespace parseArgs(String[] args) {
 363         ArgumentParser parser = ArgumentParsers.newArgumentParser("signal-cli")
 364                 .defaultHelp(true)
 365                 .description("Commandline interface for Signal.")
 366                 .version(Manager.PROJECT_NAME + " " + Manager.PROJECT_VERSION);
 367
 368         parser.addArgument("-v", "--version")
 369                 .help("Show package version.")
 370                 .action(Arguments.version());
 371         parser.addArgument("--config")
 372                 .help("Set the path, where to store the config (Default: $HOME/.config/signal-cli).");
 373
 374         MutuallyExclusiveGroup mut = parser.addMutuallyExclusiveGroup();
 375         mut.addArgument("-u", "--username")
 376                 .help("Specify your phone number, that will be used for verification.");
 377         mut.addArgument("--dbus")
 378                 .help("Make request via user dbus.")
 379                 .action(Arguments.storeTrue());
 380         mut.addArgument("--dbus-system")
 381                 .help("Make request via system dbus.")
 382                 .action(Arguments.storeTrue());
 383
 384         Subparsers subparsers = parser.addSubparsers()
 385                 .title("subcommands")
 386                 .dest("command")
 387                 .description("valid subcommands")
 388                 .help("additional help");
 389
 390         Subparser parserRegister = subparsers.addParser("register");
 391         parserRegister.addArgument("-v", "--voice")
 392                 .help("The verification should be done over voice, not sms.")
 393                 .action(Arguments.storeTrue());
 394
 395         Subparser parserVerify = subparsers.addParser("verify");
 396         parserVerify.addArgument("verificationCode")
 397                 .help("The verification code you received via sms or voice call.");
 398
 399         Subparser parserSend = subparsers.addParser("send");
 400         parserSend.addArgument("-g", "--group")
 401                 .help("Specify the recipient group ID.");
 402         parserSend.addArgument("recipient")
 403                 .help("Specify the recipients' phone number.")
 404                 .nargs("*");
 405         parserSend.addArgument("-m", "--message")
 406                 .help("Specify the message, if missing standard input is used.");
 407         parserSend.addArgument("-a", "--attachment")
 408                 .nargs("*")
 409                 .help("Add file as attachment");
 410         parserSend.addArgument("-e", "--endsession")
 411                 .help("Clear session state and send end session message.")
 412                 .action(Arguments.storeTrue());
 413
 414         Subparser parserLeaveGroup = subparsers.addParser("quitGroup");
 415         parserLeaveGroup.addArgument("-g", "--group")
 416                 .required(true)
 417                 .help("Specify the recipient group ID.");
 418
 419         Subparser parserUpdateGroup = subparsers.addParser("updateGroup");
 420         parserUpdateGroup.addArgument("-g", "--group")
 421                 .help("Specify the recipient group ID.");
 422         parserUpdateGroup.addArgument("-n", "--name")
 423                 .help("Specify the new group name.");
 424         parserUpdateGroup.addArgument("-a", "--avatar")
 425                 .help("Specify a new group avatar image file");
 426         parserUpdateGroup.addArgument("-m", "--member")
 427                 .nargs("*")
 428                 .help("Specify one or more members to add to the group");
 429
 430         Subparser parserReceive = subparsers.addParser("receive");
 431         parserReceive.addArgument("-t", "--timeout")
 432                 .type(int.class)
 433                 .help("Number of seconds to wait for new messages (negative values disable timeout)");
 434
 435         Subparser parserDaemon = subparsers.addParser("daemon");
 436         parserDaemon.addArgument("--system")
 437                 .action(Arguments.storeTrue())
 438                 .help("Use DBus system bus instead of user bus.");
 439
 440         try {
 441             Namespace ns = parser.parseArgs(args);
 442             if (!ns.getBoolean("dbus") && !ns.getBoolean("dbus_system")) {
 443                 if (ns.getString("username") == null) {
 444                     parser.printUsage();
 445                     System.err.println("You need to specify a username (phone number)");
 446                     System.exit(2);
 447                 }
 448                 if (!PhoneNumberFormatter.isValidNumber(ns.getString("username"))) {
 449                     System.err.println("Invalid username (phone number), make sure you include the country code.");
 450                     System.exit(2);
 451                 }
 452             }
 453             if (ns.getList("recipient") != null && !ns.getList("recipient").isEmpty() && ns.getString("group") != null) {
 454                 System.err.println("You cannot specify recipients by phone number and groups a the same time");
 455                 System.exit(2);
 456             }
 457             return ns;
 458         } catch (ArgumentParserException e) {
 459             parser.handleError(e);
 460             return null;
 461         }
 462     }
 463
 464     private static void handleAssertionError(AssertionError e) {
 465         System.err.println("Failed to send/receive message (Assertion): " + e.getMessage());
 466         e.printStackTrace();
 467         System.err.println("If you use an Oracle JRE please check if you have unlimited strength crypto enabled, see README");
 468         System.exit(1);
 469     }
 470
 471     private static void handleEncapsulatedExceptions(EncapsulatedExceptions e) {
 472         System.err.println("Failed to send (some) messages:");
 473         for (NetworkFailureException n : e.getNetworkExceptions()) {
 474             System.err.println("Network failure for \"" + n.getE164number() + "\": " + n.getMessage());
 475         }
 476         for (UnregisteredUserException n : e.getUnregisteredUserExceptions()) {
 477             System.err.println("Unregistered user \"" + n.getE164Number() + "\": " + n.getMessage());
 478         }
 479         for (UntrustedIdentityException n : e.getUntrustedIdentityExceptions()) {
 480             System.err.println("Untrusted Identity for \"" + n.getE164Number() + "\": " + n.getMessage());
 481         }
 482     }
 483
 484     private static void handleIOException(IOException e) {
 485         System.err.println("Failed to send message: " + e.getMessage());
 486     }
 487
 488     private static class ReceiveMessageHandler implements Manager.ReceiveMessageHandler {
 489         final Manager m;
 490
 491         public ReceiveMessageHandler(Manager m) {
 492             this.m = m;
 493         }
 494
 495         @Override
 496         public void handleMessage(SignalServiceEnvelope envelope, SignalServiceContent content, GroupInfo group) {
 497             SignalServiceAddress source = envelope.getSourceAddress();
 498             System.out.println(String.format("Envelope from: %s (device: %d)", source.getNumber(), envelope.getSourceDevice()));
 499             if (source.getRelay().isPresent()) {
 500                 System.out.println("Relayed by: " + source.getRelay().get());
 501             }
 502             System.out.println("Timestamp: " + envelope.getTimestamp());
 503
 504             if (envelope.isReceipt()) {
 505                 System.out.println("Got receipt.");
 506             } else if (envelope.isSignalMessage() | envelope.isPreKeySignalMessage()) {
 507                 if (content == null) {
 508                     System.out.println("Failed to decrypt message.");
 509                 } else {
 510                     if (content.getDataMessage().isPresent()) {
 511                         SignalServiceDataMessage message = content.getDataMessage().get();
 512
 513                         System.out.println("Message timestamp: " + message.getTimestamp());
 514
 515                         if (message.getBody().isPresent()) {
 516                             System.out.println("Body: " + message.getBody().get());
 517                         }
 518                         if (message.getGroupInfo().isPresent()) {
 519                             SignalServiceGroup groupInfo = message.getGroupInfo().get();
 520                             System.out.println("Group info:");
 521                             System.out.println("  Id: " + Base64.encodeBytes(groupInfo.getGroupId()));
 522                             if (groupInfo.getName().isPresent()) {
 523                                 System.out.println("  Name: " + groupInfo.getName().get());
 524                             } else if (group != null) {
 525                                 System.out.println("  Name: " + group.name);
 526                             } else {
 527                                 System.out.println("  Name: <Unknown group>");
 528                             }
 529                             System.out.println("  Type: " + groupInfo.getType());
 530                             if (groupInfo.getMembers().isPresent()) {
 531                                 for (String member : groupInfo.getMembers().get()) {
 532                                     System.out.println("  Member: " + member);
 533                                 }
 534                             }
 535                             if (groupInfo.getAvatar().isPresent()) {
 536                                 System.out.println("  Avatar:");
 537                                 printAttachment(groupInfo.getAvatar().get());
 538                             }
 539                         }
 540                         if (message.isEndSession()) {
 541                             System.out.println("Is end session");
 542                         }
 543
 544                         if (message.getAttachments().isPresent()) {
 545                             System.out.println("Attachments: ");
 546                             for (SignalServiceAttachment attachment : message.getAttachments().get()) {
 547                                 printAttachment(attachment);
 548                             }
 549                         }
 550                     }
 551                     if (content.getSyncMessage().isPresent()) {
 552                         SignalServiceSyncMessage syncMessage = content.getSyncMessage().get();
 553                         System.out.println("Received sync message");
 554                     }
 555                 }
 556             } else {
 557                 System.out.println("Unknown message received.");
 558             }
 559             System.out.println();
 560         }
 561
 562         private void printAttachment(SignalServiceAttachment attachment) {
 563             System.out.println("- " + attachment.getContentType() + " (" + (attachment.isPointer() ? "Pointer" : "") + (attachment.isStream() ? "Stream" : "") + ")");
 564             if (attachment.isPointer()) {
 565                 final SignalServiceAttachmentPointer pointer = attachment.asPointer();
 566                 System.out.println("  Id: " + pointer.getId() + " Key length: " + pointer.getKey().length + (pointer.getRelay().isPresent() ? " Relay: " + pointer.getRelay().get() : ""));
 567                 System.out.println("  Size: " + (pointer.getSize().isPresent() ? pointer.getSize().get() + " bytes" : "<unavailable>") + (pointer.getPreview().isPresent() ? " (Preview is available: " + pointer.getPreview().get().length + " bytes)" : ""));
 568                 File file = m.getAttachmentFile(pointer.getId());
 569                 if (file.exists()) {
 570                     System.out.println("  Stored plaintext in: " + file);
 571                 }
 572             }
 573         }
 574     }
 575
 576     private static class DbusReceiveMessageHandler extends ReceiveMessageHandler {
 577         final DBusConnection conn;
 578
 579         public DbusReceiveMessageHandler(Manager m, DBusConnection conn) {
 580             super(m);
 581             this.conn = conn;
 582         }
 583
 584         @Override
 585         public void handleMessage(SignalServiceEnvelope envelope, SignalServiceContent content, GroupInfo group) {
 586             super.handleMessage(envelope, content, group);
 587
 588             if (!envelope.isReceipt() && content != null && content.getDataMessage().isPresent()) {
 589                 SignalServiceDataMessage message = content.getDataMessage().get();
 590
 591                 if (!message.isEndSession() &&
 592                         !(message.getGroupInfo().isPresent() &&
 593                                 message.getGroupInfo().get().getType() != SignalServiceGroup.Type.DELIVER)) {
 594                     List<String> attachments = new ArrayList<>();
 595                     if (message.getAttachments().isPresent()) {
 596                         for (SignalServiceAttachment attachment : message.getAttachments().get()) {
 597                             if (attachment.isPointer()) {
 598                                 attachments.add(m.getAttachmentFile(attachment.asPointer().getId()).getAbsolutePath());
 599                             }
 600                         }
 601                     }
 602
 603                     try {
 604                         conn.sendSignal(new Signal.MessageReceived(
 605                                 SIGNAL_OBJECTPATH,
 606                                 message.getTimestamp(),
 607                                 envelope.getSource(),
 608                                 message.getGroupInfo().isPresent() ? message.getGroupInfo().get().getGroupId() : new byte[0],
 609                                 message.getBody().isPresent() ? message.getBody().get() : "",
 610                                 attachments));
 611                     } catch (DBusException e) {
 612                         e.printStackTrace();
 613                     }
 614                 }
 615             }
 616         }
 617
 618         private void printAttachment(SignalServiceAttachment attachment) {
 619             System.out.println("- " + attachment.getContentType() + " (" + (attachment.isPointer() ? "Pointer" : "") + (attachment.isStream() ? "Stream" : "") + ")");
 620             if (attachment.isPointer()) {
 621                 final SignalServiceAttachmentPointer pointer = attachment.asPointer();
 622                 System.out.println("  Id: " + pointer.getId() + " Key length: " + pointer.getKey().length + (pointer.getRelay().isPresent() ? " Relay: " + pointer.getRelay().get() : ""));
 623                 System.out.println("  Size: " + (pointer.getSize().isPresent() ? pointer.getSize().get() + " bytes" : "<unavailable>") + (pointer.getPreview().isPresent() ? " (Preview is available: " + pointer.getPreview().get().length + " bytes)" : ""));
 624                 File file = m.getAttachmentFile(pointer.getId());
 625                 if (file.exists()) {
 626                     System.out.println("  Stored plaintext in: " + file);
 627                 }
 628             }
 629         }
 630     }
 631 }