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.DBusSigHandler;
  27 import org.freedesktop.dbus.exceptions.DBusException;
  28 import org.freedesktop.dbus.exceptions.DBusExecutionException;
  29 import org.whispersystems.signalservice.api.crypto.UntrustedIdentityException;
  30 import org.whispersystems.signalservice.api.messages.*;
  31 import org.whispersystems.signalservice.api.messages.multidevice.SignalServiceSyncMessage;
  32 import org.whispersystems.signalservice.api.push.SignalServiceAddress;
  33 import org.whispersystems.signalservice.api.push.exceptions.EncapsulatedExceptions;
  34 import org.whispersystems.signalservice.api.push.exceptions.NetworkFailureException;
  35 import org.whispersystems.signalservice.api.push.exceptions.UnregisteredUserException;
  36 import org.whispersystems.signalservice.api.util.PhoneNumberFormatter;
  37
  38 import java.io.File;
  39 import java.io.IOException;
  40 import java.security.Security;
  41 import java.util.ArrayList;
  42 import java.util.List;
  43
  44 public class Main {
  45
  46     public static final String SIGNAL_BUSNAME = "org.asamk.Signal";
  47     public static final String SIGNAL_OBJECTPATH = "/org/asamk/Signal";
  48
  49     public static void main(String[] args) {
  50         // Workaround for BKS truststore
  51         Security.insertProviderAt(new org.spongycastle.jce.provider.BouncyCastleProvider(), 1);
  52
  53         Namespace ns = parseArgs(args);
  54         if (ns == null) {
  55             System.exit(1);
  56         }
  57
  58         final String username = ns.getString("username");
  59         Manager m;
  60         Signal ts;
  61         DBusConnection dBusConn = null;
  62         try {
  63             if (ns.getBoolean("dbus") || ns.getBoolean("dbus_system")) {
  64                 try {
  65                     m = null;
  66                     int busType;
  67                     if (ns.getBoolean("dbus_system")) {
  68                         busType = DBusConnection.SYSTEM;
  69                     } else {
  70                         busType = DBusConnection.SESSION;
  71                     }
  72                     dBusConn = DBusConnection.getConnection(busType);
  73                     ts = (Signal) dBusConn.getRemoteObject(
  74                             SIGNAL_BUSNAME, SIGNAL_OBJECTPATH,
  75                             Signal.class);
  76                 } catch (DBusException e) {
  77                     e.printStackTrace();
  78                     if (dBusConn != null) {
  79                         dBusConn.disconnect();
  80                     }
  81                     System.exit(3);
  82                     return;
  83                 }
  84             } else {
  85                 String settingsPath = ns.getString("config");
  86                 if (TextUtils.isEmpty(settingsPath)) {
  87                     settingsPath = System.getProperty("user.home") + "/.config/signal";
  88                     if (!new File(settingsPath).exists()) {
  89                         String legacySettingsPath = System.getProperty("user.home") + "/.config/textsecure";
  90                         if (new File(legacySettingsPath).exists()) {
  91                             settingsPath = legacySettingsPath;
  92                         }
  93                     }
  94                 }
  95
  96                 m = new Manager(username, settingsPath);
  97                 ts = m;
  98                 if (m.userExists()) {
  99                     try {
 100                         m.load();
 101                     } catch (Exception e) {
 102                         System.err.println("Error loading state file \"" + m.getFileName() + "\": " + e.getMessage());
 103                         System.exit(2);
 104                         return;
 105                     }
 106                 }
 107             }
 108
 109             switch (ns.getString("command")) {
 110                 case "register":
 111                     if (dBusConn != null) {
 112                         System.err.println("register is not yet implementd via dbus");
 113                         System.exit(1);
 114                     }
 115                     if (!m.userHasKeys()) {
 116                         m.createNewIdentity();
 117                     }
 118                     try {
 119                         m.register(ns.getBoolean("voice"));
 120                     } catch (IOException e) {
 121                         System.err.println("Request verify error: " + e.getMessage());
 122                         System.exit(3);
 123                     }
 124                     break;
 125                 case "verify":
 126                     if (dBusConn != null) {
 127                         System.err.println("verify is not yet implementd via dbus");
 128                         System.exit(1);
 129                     }
 130                     if (!m.userHasKeys()) {
 131                         System.err.println("User has no keys, first call register.");
 132                         System.exit(1);
 133                     }
 134                     if (m.isRegistered()) {
 135                         System.err.println("User registration is already verified");
 136                         System.exit(1);
 137                     }
 138                     try {
 139                         m.verifyAccount(ns.getString("verificationCode"));
 140                     } catch (IOException e) {
 141                         System.err.println("Verify error: " + e.getMessage());
 142                         System.exit(3);
 143                     }
 144                     break;
 145                 case "send":
 146                     if (dBusConn == null && !m.isRegistered()) {
 147                         System.err.println("User is not registered.");
 148                         System.exit(1);
 149                     }
 150
 151                     if (ns.getBoolean("endsession")) {
 152                         if (ns.getList("recipient") == null) {
 153                             System.err.println("No recipients given");
 154                             System.err.println("Aborting sending.");
 155                             System.exit(1);
 156                         }
 157                         try {
 158                             ts.sendEndSessionMessage(ns.<String>getList("recipient"));
 159                         } catch (IOException e) {
 160                             handleIOException(e);
 161                         } catch (EncapsulatedExceptions e) {
 162                             handleEncapsulatedExceptions(e);
 163                         } catch (AssertionError e) {
 164                             handleAssertionError(e);
 165                         } catch (DBusExecutionException e) {
 166                             handleDBusExecutionException(e);
 167                         }
 168                     } else {
 169                         String messageText = ns.getString("message");
 170                         if (messageText == null) {
 171                             try {
 172                                 messageText = IOUtils.toString(System.in);
 173                             } catch (IOException e) {
 174                                 System.err.println("Failed to read message from stdin: " + e.getMessage());
 175                                 System.err.println("Aborting sending.");
 176                                 System.exit(1);
 177                             }
 178                         }
 179
 180                         try {
 181                             List<String> attachments = ns.getList("attachment");
 182                             if (attachments == null) {
 183                                 attachments = new ArrayList<>();
 184                             }
 185                             if (ns.getString("group") != null) {
 186                                 byte[] groupId = decodeGroupId(ns.getString("group"));
 187                                 ts.sendGroupMessage(messageText, attachments, groupId);
 188                             } else {
 189                                 ts.sendMessage(messageText, attachments, ns.<String>getList("recipient"));
 190                             }
 191                         } catch (IOException e) {
 192                             handleIOException(e);
 193                         } catch (EncapsulatedExceptions e) {
 194                             handleEncapsulatedExceptions(e);
 195                         } catch (AssertionError e) {
 196                             handleAssertionError(e);
 197                         } catch (GroupNotFoundException e) {
 198                             handleGroupNotFoundException(e);
 199                         } catch (AttachmentInvalidException e) {
 200                             System.err.println("Failed to add attachment: " + e.getMessage());
 201                             System.err.println("Aborting sending.");
 202                             System.exit(1);
 203                         } catch (DBusExecutionException e) {
 204                             handleDBusExecutionException(e);
 205                         }
 206                     }
 207
 208                     break;
 209                 case "receive":
 210                     if (dBusConn != null) {
 211                         try {
 212                             dBusConn.addSigHandler(Signal.MessageReceived.class, new DBusSigHandler<Signal.MessageReceived>() {
 213                                 @Override
 214                                 public void handle(Signal.MessageReceived s) {
 215                                     System.out.print(String.format("Envelope from: %s\nTimestamp: %d\nBody: %s\n",
 216                                             s.getSender(), s.getTimestamp(), s.getMessage()));
 217                                     if (s.getGroupId().length > 0) {
 218                                         System.out.println("Group info:");
 219                                         System.out.println("  Id: " + Base64.encodeBytes(s.getGroupId()));
 220                                     }
 221                                     if (s.getAttachments().size() > 0) {
 222                                         System.out.println("Attachments: ");
 223                                         for (String attachment : s.getAttachments()) {
 224                                             System.out.println("-  Stored plaintext in: " + attachment);
 225                                         }
 226                                     }
 227                                     System.out.println();
 228                                 }
 229                             });
 230                         } catch (DBusException e) {
 231                             e.printStackTrace();
 232                         }
 233                         while (true) {
 234                             try {
 235                                 Thread.sleep(10000);
 236                             } catch (InterruptedException e) {
 237                                 System.exit(0);
 238                             }
 239                         }
 240                     }
 241                     if (!m.isRegistered()) {
 242                         System.err.println("User is not registered.");
 243                         System.exit(1);
 244                     }
 245                     int timeout = 5;
 246                     if (ns.getInt("timeout") != null) {
 247                         timeout = ns.getInt("timeout");
 248                     }
 249                     boolean returnOnTimeout = true;
 250                     if (timeout < 0) {
 251                         returnOnTimeout = false;
 252                         timeout = 3600;
 253                     }
 254                     try {
 255                         m.receiveMessages(timeout, returnOnTimeout, new ReceiveMessageHandler(m));
 256                     } catch (IOException e) {
 257                         System.err.println("Error while receiving messages: " + e.getMessage());
 258                         System.exit(3);
 259                     } catch (AssertionError e) {
 260                         handleAssertionError(e);
 261                     }
 262                     break;
 263                 case "quitGroup":
 264                     if (dBusConn != null) {
 265                         System.err.println("quitGroup is not yet implementd via dbus");
 266                         System.exit(1);
 267                     }
 268                     if (!m.isRegistered()) {
 269                         System.err.println("User is not registered.");
 270                         System.exit(1);
 271                     }
 272
 273                     try {
 274                         m.sendQuitGroupMessage(decodeGroupId(ns.getString("group")));
 275                     } catch (IOException e) {
 276                         handleIOException(e);
 277                     } catch (EncapsulatedExceptions e) {
 278                         handleEncapsulatedExceptions(e);
 279                     } catch (AssertionError e) {
 280                         handleAssertionError(e);
 281                     } catch (GroupNotFoundException e) {
 282                         handleGroupNotFoundException(e);
 283                     }
 284
 285                     break;
 286                 case "updateGroup":
 287                     if (dBusConn != null) {
 288                         System.err.println("updateGroup is not yet implementd via dbus");
 289                         System.exit(1);
 290                     }
 291                     if (!m.isRegistered()) {
 292                         System.err.println("User is not registered.");
 293                         System.exit(1);
 294                     }
 295
 296                     try {
 297                         byte[] groupId = null;
 298                         if (ns.getString("group") != null) {
 299                             groupId = decodeGroupId(ns.getString("group"));
 300                         }
 301                         byte[] newGroupId = m.sendUpdateGroupMessage(groupId, ns.getString("name"), ns.<String>getList("member"), ns.getString("avatar"));
 302                         if (groupId == null) {
 303                             System.out.println("Creating new group \"" + Base64.encodeBytes(newGroupId) + "\" …");
 304                         }
 305                     } catch (IOException e) {
 306                         handleIOException(e);
 307                     } catch (AttachmentInvalidException e) {
 308                         System.err.println("Failed to add avatar attachment for group\": " + e.getMessage());
 309                         System.err.println("Aborting sending.");
 310                         System.exit(1);
 311                     } catch (GroupNotFoundException e) {
 312                         handleGroupNotFoundException(e);
 313                     } catch (EncapsulatedExceptions e) {
 314                         handleEncapsulatedExceptions(e);
 315                     }
 316
 317                     break;
 318                 case "daemon":
 319                     if (dBusConn != null) {
 320                         System.err.println("Stop it.");
 321                         System.exit(1);
 322                     }
 323                     if (!m.isRegistered()) {
 324                         System.err.println("User is not registered.");
 325                         System.exit(1);
 326                     }
 327                     DBusConnection conn = null;
 328                     try {
 329                         try {
 330                             int busType;
 331                             if (ns.getBoolean("system")) {
 332                                 busType = DBusConnection.SYSTEM;
 333                             } else {
 334                                 busType = DBusConnection.SESSION;
 335                             }
 336                             conn = DBusConnection.getConnection(busType);
 337                             conn.exportObject(SIGNAL_OBJECTPATH, m);
 338                             conn.requestBusName(SIGNAL_BUSNAME);
 339                         } catch (DBusException e) {
 340                             e.printStackTrace();
 341                             System.exit(3);
 342                         }
 343                         try {
 344                             m.receiveMessages(3600, false, new DbusReceiveMessageHandler(m, conn));
 345                         } catch (IOException e) {
 346                             System.err.println("Error while receiving messages: " + e.getMessage());
 347                             System.exit(3);
 348                         } catch (AssertionError e) {
 349                             handleAssertionError(e);
 350                         }
 351                     } finally {
 352                         if (conn != null) {
 353                             conn.disconnect();
 354                         }
 355                     }
 356
 357                     break;
 358             }
 359             System.exit(0);
 360         } finally {
 361             if (dBusConn != null) {
 362                 dBusConn.disconnect();
 363             }
 364         }
 365     }
 366
 367     private static void handleGroupNotFoundException(GroupNotFoundException e) {
 368         System.err.println("Failed to send to group: " + e.getMessage());
 369         System.err.println("Aborting sending.");
 370         System.exit(1);
 371     }
 372
 373     private static void handleDBusExecutionException(DBusExecutionException e) {
 374         System.err.println("Cannot connect to dbus: " + e.getMessage());
 375         System.err.println("Aborting.");
 376         System.exit(1);
 377     }
 378
 379     private static byte[] decodeGroupId(String groupId) {
 380         try {
 381             return Base64.decode(groupId);
 382         } catch (IOException e) {
 383             System.err.println("Failed to decode groupId (must be base64) \"" + groupId + "\": " + e.getMessage());
 384             System.err.println("Aborting sending.");
 385             System.exit(1);
 386             return null;
 387         }
 388     }
 389
 390     private static Namespace parseArgs(String[] args) {
 391         ArgumentParser parser = ArgumentParsers.newArgumentParser("signal-cli")
 392                 .defaultHelp(true)
 393                 .description("Commandline interface for Signal.")
 394                 .version(Manager.PROJECT_NAME + " " + Manager.PROJECT_VERSION);
 395
 396         parser.addArgument("-v", "--version")
 397                 .help("Show package version.")
 398                 .action(Arguments.version());
 399         parser.addArgument("--config")
 400                 .help("Set the path, where to store the config (Default: $HOME/.config/signal-cli).");
 401
 402         MutuallyExclusiveGroup mut = parser.addMutuallyExclusiveGroup();
 403         mut.addArgument("-u", "--username")
 404                 .help("Specify your phone number, that will be used for verification.");
 405         mut.addArgument("--dbus")
 406                 .help("Make request via user dbus.")
 407                 .action(Arguments.storeTrue());
 408         mut.addArgument("--dbus-system")
 409                 .help("Make request via system dbus.")
 410                 .action(Arguments.storeTrue());
 411
 412         Subparsers subparsers = parser.addSubparsers()
 413                 .title("subcommands")
 414                 .dest("command")
 415                 .description("valid subcommands")
 416                 .help("additional help");
 417
 418         Subparser parserRegister = subparsers.addParser("register");
 419         parserRegister.addArgument("-v", "--voice")
 420                 .help("The verification should be done over voice, not sms.")
 421                 .action(Arguments.storeTrue());
 422
 423         Subparser parserVerify = subparsers.addParser("verify");
 424         parserVerify.addArgument("verificationCode")
 425                 .help("The verification code you received via sms or voice call.");
 426
 427         Subparser parserSend = subparsers.addParser("send");
 428         parserSend.addArgument("-g", "--group")
 429                 .help("Specify the recipient group ID.");
 430         parserSend.addArgument("recipient")
 431                 .help("Specify the recipients' phone number.")
 432                 .nargs("*");
 433         parserSend.addArgument("-m", "--message")
 434                 .help("Specify the message, if missing standard input is used.");
 435         parserSend.addArgument("-a", "--attachment")
 436                 .nargs("*")
 437                 .help("Add file as attachment");
 438         parserSend.addArgument("-e", "--endsession")
 439                 .help("Clear session state and send end session message.")
 440                 .action(Arguments.storeTrue());
 441
 442         Subparser parserLeaveGroup = subparsers.addParser("quitGroup");
 443         parserLeaveGroup.addArgument("-g", "--group")
 444                 .required(true)
 445                 .help("Specify the recipient group ID.");
 446
 447         Subparser parserUpdateGroup = subparsers.addParser("updateGroup");
 448         parserUpdateGroup.addArgument("-g", "--group")
 449                 .help("Specify the recipient group ID.");
 450         parserUpdateGroup.addArgument("-n", "--name")
 451                 .help("Specify the new group name.");
 452         parserUpdateGroup.addArgument("-a", "--avatar")
 453                 .help("Specify a new group avatar image file");
 454         parserUpdateGroup.addArgument("-m", "--member")
 455                 .nargs("*")
 456                 .help("Specify one or more members to add to the group");
 457
 458         Subparser parserReceive = subparsers.addParser("receive");
 459         parserReceive.addArgument("-t", "--timeout")
 460                 .type(int.class)
 461                 .help("Number of seconds to wait for new messages (negative values disable timeout)");
 462
 463         Subparser parserDaemon = subparsers.addParser("daemon");
 464         parserDaemon.addArgument("--system")
 465                 .action(Arguments.storeTrue())
 466                 .help("Use DBus system bus instead of user bus.");
 467
 468         try {
 469             Namespace ns = parser.parseArgs(args);
 470             if (!ns.getBoolean("dbus") && !ns.getBoolean("dbus_system")) {
 471                 if (ns.getString("username") == null) {
 472                     parser.printUsage();
 473                     System.err.println("You need to specify a username (phone number)");
 474                     System.exit(2);
 475                 }
 476                 if (!PhoneNumberFormatter.isValidNumber(ns.getString("username"))) {
 477                     System.err.println("Invalid username (phone number), make sure you include the country code.");
 478                     System.exit(2);
 479                 }
 480             }
 481             if (ns.getList("recipient") != null && !ns.getList("recipient").isEmpty() && ns.getString("group") != null) {
 482                 System.err.println("You cannot specify recipients by phone number and groups a the same time");
 483                 System.exit(2);
 484             }
 485             return ns;
 486         } catch (ArgumentParserException e) {
 487             parser.handleError(e);
 488             return null;
 489         }
 490     }
 491
 492     private static void handleAssertionError(AssertionError e) {
 493         System.err.println("Failed to send/receive message (Assertion): " + e.getMessage());
 494         e.printStackTrace();
 495         System.err.println("If you use an Oracle JRE please check if you have unlimited strength crypto enabled, see README");
 496         System.exit(1);
 497     }
 498
 499     private static void handleEncapsulatedExceptions(EncapsulatedExceptions e) {
 500         System.err.println("Failed to send (some) messages:");
 501         for (NetworkFailureException n : e.getNetworkExceptions()) {
 502             System.err.println("Network failure for \"" + n.getE164number() + "\": " + n.getMessage());
 503         }
 504         for (UnregisteredUserException n : e.getUnregisteredUserExceptions()) {
 505             System.err.println("Unregistered user \"" + n.getE164Number() + "\": " + n.getMessage());
 506         }
 507         for (UntrustedIdentityException n : e.getUntrustedIdentityExceptions()) {
 508             System.err.println("Untrusted Identity for \"" + n.getE164Number() + "\": " + n.getMessage());
 509         }
 510     }
 511
 512     private static void handleIOException(IOException e) {
 513         System.err.println("Failed to send message: " + e.getMessage());
 514     }
 515
 516     private static class ReceiveMessageHandler implements Manager.ReceiveMessageHandler {
 517         final Manager m;
 518
 519         public ReceiveMessageHandler(Manager m) {
 520             this.m = m;
 521         }
 522
 523         @Override
 524         public void handleMessage(SignalServiceEnvelope envelope, SignalServiceContent content, GroupInfo group) {
 525             SignalServiceAddress source = envelope.getSourceAddress();
 526             System.out.println(String.format("Envelope from: %s (device: %d)", source.getNumber(), envelope.getSourceDevice()));
 527             if (source.getRelay().isPresent()) {
 528                 System.out.println("Relayed by: " + source.getRelay().get());
 529             }
 530             System.out.println("Timestamp: " + envelope.getTimestamp());
 531
 532             if (envelope.isReceipt()) {
 533                 System.out.println("Got receipt.");
 534             } else if (envelope.isSignalMessage() | envelope.isPreKeySignalMessage()) {
 535                 if (content == null) {
 536                     System.out.println("Failed to decrypt message.");
 537                 } else {
 538                     if (content.getDataMessage().isPresent()) {
 539                         SignalServiceDataMessage message = content.getDataMessage().get();
 540
 541                         System.out.println("Message timestamp: " + message.getTimestamp());
 542
 543                         if (message.getBody().isPresent()) {
 544                             System.out.println("Body: " + message.getBody().get());
 545                         }
 546                         if (message.getGroupInfo().isPresent()) {
 547                             SignalServiceGroup groupInfo = message.getGroupInfo().get();
 548                             System.out.println("Group info:");
 549                             System.out.println("  Id: " + Base64.encodeBytes(groupInfo.getGroupId()));
 550                             if (groupInfo.getName().isPresent()) {
 551                                 System.out.println("  Name: " + groupInfo.getName().get());
 552                             } else if (group != null) {
 553                                 System.out.println("  Name: " + group.name);
 554                             } else {
 555                                 System.out.println("  Name: <Unknown group>");
 556                             }
 557                             System.out.println("  Type: " + groupInfo.getType());
 558                             if (groupInfo.getMembers().isPresent()) {
 559                                 for (String member : groupInfo.getMembers().get()) {
 560                                     System.out.println("  Member: " + member);
 561                                 }
 562                             }
 563                             if (groupInfo.getAvatar().isPresent()) {
 564                                 System.out.println("  Avatar:");
 565                                 printAttachment(groupInfo.getAvatar().get());
 566                             }
 567                         }
 568                         if (message.isEndSession()) {
 569                             System.out.println("Is end session");
 570                         }
 571
 572                         if (message.getAttachments().isPresent()) {
 573                             System.out.println("Attachments: ");
 574                             for (SignalServiceAttachment attachment : message.getAttachments().get()) {
 575                                 printAttachment(attachment);
 576                             }
 577                         }
 578                     }
 579                     if (content.getSyncMessage().isPresent()) {
 580                         SignalServiceSyncMessage syncMessage = content.getSyncMessage().get();
 581                         System.out.println("Received sync message");
 582                     }
 583                 }
 584             } else {
 585                 System.out.println("Unknown message received.");
 586             }
 587             System.out.println();
 588         }
 589
 590         private void printAttachment(SignalServiceAttachment attachment) {
 591             System.out.println("- " + attachment.getContentType() + " (" + (attachment.isPointer() ? "Pointer" : "") + (attachment.isStream() ? "Stream" : "") + ")");
 592             if (attachment.isPointer()) {
 593                 final SignalServiceAttachmentPointer pointer = attachment.asPointer();
 594                 System.out.println("  Id: " + pointer.getId() + " Key length: " + pointer.getKey().length + (pointer.getRelay().isPresent() ? " Relay: " + pointer.getRelay().get() : ""));
 595                 System.out.println("  Size: " + (pointer.getSize().isPresent() ? pointer.getSize().get() + " bytes" : "<unavailable>") + (pointer.getPreview().isPresent() ? " (Preview is available: " + pointer.getPreview().get().length + " bytes)" : ""));
 596                 File file = m.getAttachmentFile(pointer.getId());
 597                 if (file.exists()) {
 598                     System.out.println("  Stored plaintext in: " + file);
 599                 }
 600             }
 601         }
 602     }
 603
 604     private static class DbusReceiveMessageHandler extends ReceiveMessageHandler {
 605         final DBusConnection conn;
 606
 607         public DbusReceiveMessageHandler(Manager m, DBusConnection conn) {
 608             super(m);
 609             this.conn = conn;
 610         }
 611
 612         @Override
 613         public void handleMessage(SignalServiceEnvelope envelope, SignalServiceContent content, GroupInfo group) {
 614             super.handleMessage(envelope, content, group);
 615
 616             if (!envelope.isReceipt() && content != null && content.getDataMessage().isPresent()) {
 617                 SignalServiceDataMessage message = content.getDataMessage().get();
 618
 619                 if (!message.isEndSession() &&
 620                         !(message.getGroupInfo().isPresent() &&
 621                                 message.getGroupInfo().get().getType() != SignalServiceGroup.Type.DELIVER)) {
 622                     List<String> attachments = new ArrayList<>();
 623                     if (message.getAttachments().isPresent()) {
 624                         for (SignalServiceAttachment attachment : message.getAttachments().get()) {
 625                             if (attachment.isPointer()) {
 626                                 attachments.add(m.getAttachmentFile(attachment.asPointer().getId()).getAbsolutePath());
 627                             }
 628                         }
 629                     }
 630
 631                     try {
 632                         conn.sendSignal(new Signal.MessageReceived(
 633                                 SIGNAL_OBJECTPATH,
 634                                 message.getTimestamp(),
 635                                 envelope.getSource(),
 636                                 message.getGroupInfo().isPresent() ? message.getGroupInfo().get().getGroupId() : new byte[0],
 637                                 message.getBody().isPresent() ? message.getBody().get() : "",
 638                                 attachments));
 639                     } catch (DBusException e) {
 640                         e.printStackTrace();
 641                     }
 642                 }
 643             }
 644         }
 645
 646         private void printAttachment(SignalServiceAttachment attachment) {
 647             System.out.println("- " + attachment.getContentType() + " (" + (attachment.isPointer() ? "Pointer" : "") + (attachment.isStream() ? "Stream" : "") + ")");
 648             if (attachment.isPointer()) {
 649                 final SignalServiceAttachmentPointer pointer = attachment.asPointer();
 650                 System.out.println("  Id: " + pointer.getId() + " Key length: " + pointer.getKey().length + (pointer.getRelay().isPresent() ? " Relay: " + pointer.getRelay().get() : ""));
 651                 System.out.println("  Size: " + (pointer.getSize().isPresent() ? pointer.getSize().get() + " bytes" : "<unavailable>") + (pointer.getPreview().isPresent() ? " (Preview is available: " + pointer.getPreview().get().length + " bytes)" : ""));
 652                 File file = m.getAttachmentFile(pointer.getId());
 653                 if (file.exists()) {
 654                     System.out.println("  Stored plaintext in: " + file);
 655                 }
 656             }
 657         }
 658     }
 659 }