GitLab is used only for code review, issue tracking and project management. Canonical locations for source code are still https://gitweb.torproject.org/ https://git.torproject.org/ and git-rw.torproject.org.

tl-util.jsm 25.8 KB
Newer Older
1
// Copyright (c) 2017, The Tor Project, Inc.
2 3 4 5 6 7 8 9 10 11 12 13
// See LICENSE for licensing information.
//
// vim: set sw=2 sts=2 ts=8 et syntax=javascript:

/*************************************************************************
 * Tor Launcher Util JS Module
 *************************************************************************/

let EXPORTED_SYMBOLS = [ "TorLauncherUtil" ];

const Cc = Components.classes;
const Ci = Components.interfaces;
14
const Cu = Components.utils;
15
const kPropBundleURI = "chrome://torlauncher/locale/torlauncher.properties";
16 17
const kPropNamePrefix = "torlauncher.";

18 19 20 21
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "TorLauncherLogger",
                          "resource://torlauncher/modules/tl-logger.jsm");

22 23 24 25
let TorLauncherUtil =  // Public
{
  get isMac()
  {
26
    return TLUtilInternal._isMac;
27 28 29 30 31 32 33
  },

  get isWindows()
  {
    return ("WINNT" == TLUtilInternal._OS);
  },

34 35 36 37 38 39 40 41 42
  isAppVersionAtLeast: function(aVersion)
  {
    var appInfo = Cc["@mozilla.org/xre/app-info;1"]
                    .getService(Ci.nsIXULAppInfo);
    var vc = Cc["@mozilla.org/xpcom/version-comparator;1"]
               .getService(Ci.nsIVersionComparator);
    return (vc.compare(appInfo.version, aVersion) >= 0);
  },

43 44 45
  // Error Reporting / Prompting
  showAlert: function(aParentWindow, aMsg)
  {
46
    // TODO: alert() does not always resize correctly to fit the message.
47 48 49 50 51 52
    try
    {
      if (!aParentWindow)
      {
        var wm = Cc["@mozilla.org/appshell/window-mediator;1"]
                   .getService(Ci.nsIWindowMediator);
53 54 55 56 57 58 59 60 61 62 63 64
        let settingsWindow =
                          wm.getMostRecentWindow("TorLauncher:NetworkSettings");
        if (TLUtilInternal._isWindowVisible(settingsWindow))
        {
          aParentWindow = settingsWindow;
        }
        else
        {
          let browserWindow = wm.getMostRecentWindow("navigator:browser");
          if (TLUtilInternal._isWindowVisible(browserWindow))
            aParentWindow = browserWindow;
        }
65 66 67 68 69 70 71 72 73 74 75 76 77
      }

      var ps = Cc["@mozilla.org/embedcomp/prompt-service;1"]
                 .getService(Ci.nsIPromptService);
      var title = this.getLocalizedString("error_title");
      ps.alert(aParentWindow, title, aMsg);
    }
    catch (e)
    {
      alert(aMsg);
    }
  },

78 79 80
  // Returns true if user confirms; false if not.
  // Note that no prompt is shown (and false is returned) if the Network Settings
  // window is open.
81 82
  showConfirm: function(aParentWindow, aMsg, aDefaultButtonLabel,
                        aCancelButtonLabel)
83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101
  {
    try
    {
      if (!aParentWindow)
      {
        var wm = Cc["@mozilla.org/appshell/window-mediator;1"]
                   .getService(Ci.nsIWindowMediator);
        aParentWindow = wm.getMostRecentWindow("TorLauncher:NetworkSettings");
        if (aParentWindow)
          return false; // Don't show prompt if Network Settings window is open.

        aParentWindow = wm.getMostRecentWindow("navigator:browser");
      }

      var ps = Cc["@mozilla.org/embedcomp/prompt-service;1"]
                 .getService(Ci.nsIPromptService);
      var title = this.getLocalizedString("error_title");
      var btnFlags = (ps.BUTTON_POS_0 * ps.BUTTON_TITLE_IS_STRING)
                     + ps.BUTTON_POS_0_DEFAULT
102
                     + (ps.BUTTON_POS_1 * ps.BUTTON_TITLE_IS_STRING);
103 104 105

      var notUsed = { value: false };
      var btnIndex =  ps.confirmEx(aParentWindow, title, aMsg, btnFlags,
106 107
                                   aDefaultButtonLabel, aCancelButtonLabel,
                                   null, null, notUsed);
108 109 110 111 112 113 114 115 116 117
      return (0 == btnIndex);
    }
    catch (e)
    {
      return confirm(aMsg);
    }

    return false;
  },

118
  getSaveSettingsErrorMessage: function(aDetails)
119 120 121 122
  {
    if (!aDetails)
      aDetails = TorLauncherUtil.getLocalizedString("ensure_tor_is_running");

123
    return TorLauncherUtil.getFormattedLocalizedString(
124 125 126
                                  "failed_to_save_settings", [aDetails], 1);
  },

127
  // Localized Strings
128 129 130 131
  flushLocalizedStringCache: function()
  {
    TLUtilInternal.mStringBundle = undefined;
  },
132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163

  // "torlauncher." is prepended to aStringName.
  getLocalizedString: function(aStringName)
  {
    if (!aStringName)
      return aStringName;

    try
    {
      var key = kPropNamePrefix + aStringName;
      return TLUtilInternal._stringBundle.GetStringFromName(key);
    } catch(e) {}

    return aStringName;
  },

  // "torlauncher." is prepended to aStringName.
  getFormattedLocalizedString: function(aStringName, aArray, aLen)
  {
    if (!aStringName || !aArray)
      return aStringName;

    try
    {
      var key = kPropNamePrefix + aStringName;
      return TLUtilInternal._stringBundle.formatStringFromName(key,
                                                               aArray, aLen);
    } catch(e) {}

    return aStringName;
  },

164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201
  getLocalizedBootstrapStatus: function(aStatusObj, aKeyword)
  {
    if (!aStatusObj || !aKeyword)
      return "";

    var result;
    var fallbackStr;
    if (aStatusObj[aKeyword])
    {
      var val = aStatusObj[aKeyword].toLowerCase();
      var key;
      if (aKeyword == "TAG")
      {
        if ("onehop_create" == val)
          val = "handshake_dir";
        else if ("circuit_create" == val)
          val = "handshake_or";

        key = "bootstrapStatus." + val;
        fallbackStr = aStatusObj.SUMMARY;
      }
      else if (aKeyword == "REASON")
      {
        if ("connectreset" == val)
          val = "connectrefused";

        key = "bootstrapWarning." + val;
        fallbackStr = aStatusObj.WARNING;
      }

      result = TorLauncherUtil.getLocalizedString(key);
      if (result == key)
        result = undefined;
    }

    if (!result)
      result = fallbackStr;

202 203 204
    if ((aKeyword == "REASON") && aStatusObj.HOSTADDR)
      result += " - " + aStatusObj.HOSTADDR;

205 206 207
    return (result) ? result : "";
  },

208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241
  // Preferences
  getBoolPref: function(aPrefName, aDefaultVal)
  {
    var rv = (undefined != aDefaultVal) ? aDefaultVal : false;

    try
    {
      rv = TLUtilInternal.mPrefsSvc.getBoolPref(aPrefName);
    } catch (e) {}

    return rv;
  },

  setBoolPref: function(aPrefName, aVal)
  {
    var val = (undefined != aVal) ? aVal : false;
    try
    {
      TLUtilInternal.mPrefsSvc.setBoolPref(aPrefName, val);
    } catch (e) {}
  },

  getIntPref: function(aPrefName, aDefaultVal)
  {
    var rv = aDefaultVal ? aDefaultVal : 0;

    try
    {
      rv = TLUtilInternal.mPrefsSvc.getIntPref(aPrefName);
    } catch (e) {}

    return rv;
  },

242 243 244 245 246 247 248 249 250
  setIntPref: function(aPrefName, aVal)
  {
    var val = (undefined != aVal) ? aVal : 0;
    try
    {
      TLUtilInternal.mPrefsSvc.setIntPref(aPrefName, val);
    } catch (e) {}
  },

251 252 253 254 255 256 257 258 259 260 261
  getCharPref: function(aPrefName, aDefaultVal)
  {
    var rv = aDefaultVal ? aDefaultVal : "";

    try
    {
      rv = TLUtilInternal.mPrefsSvc.getCharPref(aPrefName);
    } catch (e) {}

    return rv;
  },
262

263 264 265 266 267 268 269 270
  setCharPref: function(aPrefName, aVal)
  {
    try
    {
      TLUtilInternal.mPrefsSvc.setCharPref(aPrefName, aVal ? aVal : "");
    } catch (e) {}
  },

271 272 273 274 275 276 277 278
  clearUserPref: function(aPrefName)
  {
    try
    {
      TLUtilInternal.mPrefsSvc.clearUserPref(aPrefName);
    } catch (e) {}
  },

279 280 281 282 283 284 285 286 287 288 289 290 291
  // Currently, this returns a random permutation of an array, bridgeArray.
  // Later, we might want to change this function to weight based on the
  // bridges' bandwidths.
  rearrangeBridges: function(bridgeArray)
  {
    for (var j, x, i = bridgeArray.length; i;
           j = parseInt(Math.random() * i),
           x = bridgeArray[--i],
           bridgeArray[i] = bridgeArray[j],
           bridgeArray[j] = x);
    return bridgeArray;
  },

292 293 294 295 296 297 298 299 300 301 302 303 304 305 306
  get shouldStartAndOwnTor()
  {
    const kPrefStartTor = "extensions.torlauncher.start_tor";
    try
    {
      const kEnvSkipLaunch = "TOR_SKIP_LAUNCH";

      var env = Cc["@mozilla.org/process/environment;1"]
                  .getService(Ci.nsIEnvironment);
      if (env.exists(kEnvSkipLaunch))
        return ("1" != env.get(kEnvSkipLaunch));
    } catch(e) {}

    return this.getBoolPref(kPrefStartTor, true);
  },
307

308 309
  get shouldPromptForLocale()
  {
310 311 312 313
    // We are not supporting locale selection on the alpha/stable channel
    // right now. Thus, no prompt for the user.
    return false;
    /* const kPrefPromptForLocale = "extensions.torlauncher.prompt_for_locale";
314 315 316 317 318 319 320 321 322 323
    try
    {
      const kEnvSkipLocalePrompt = "TOR_SKIP_LOCALE_PROMPT";

      var env = Cc["@mozilla.org/process/environment;1"]
                  .getService(Ci.nsIEnvironment);
      if (env.exists(kEnvSkipLocalePrompt))
        return ("1" != env.get(kEnvSkipLocalePrompt));
    } catch(e) {}

324
    return this.getBoolPref(kPrefPromptForLocale, true); */
325 326
  },

327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342
  get shouldShowNetworkSettings()
  {
    const kPrefPromptAtStartup = "extensions.torlauncher.prompt_at_startup";
    try
    {
      const kEnvForceShowNetConfig = "TOR_FORCE_NET_CONFIG";

      var env = Cc["@mozilla.org/process/environment;1"]
                  .getService(Ci.nsIEnvironment);
      if (env.exists(kEnvForceShowNetConfig))
        return ("1" == env.get(kEnvForceShowNetConfig));
    } catch(e) {}

    return this.getBoolPref(kPrefPromptAtStartup, true);
  },

343 344 345 346 347 348 349 350 351 352 353 354 355 356 357
  get shouldOnlyConfigureTor()
  {
    const kPrefOnlyConfigureTor = "extensions.torlauncher.only_configure_tor";
    try
    {
      const kEnvOnlyConfigureTor = "TOR_CONFIGURE_ONLY";

      var env = Cc["@mozilla.org/process/environment;1"]
                  .getService(Ci.nsIEnvironment);
      if (env.exists(kEnvOnlyConfigureTor))
        return ("1" == env.get(kEnvOnlyConfigureTor));
    } catch(e) {}

    return this.getBoolPref(kPrefOnlyConfigureTor, false);
  },
358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409

  // Returns an array of strings or undefined if none are available.
  get defaultBridgeTypes()
  {
    try
    {
      var prefBranch = Cc["@mozilla.org/preferences-service;1"]
                           .getService(Ci.nsIPrefService)
                           .getBranch("extensions.torlauncher.default_bridge.");
      var childPrefs = prefBranch.getChildList("", []);
      var typeArray = [];
      for (var i = 0; i < childPrefs.length; ++i)
      {
        var s = childPrefs[i].replace(/\..*$/, "");
        if (-1 == typeArray.lastIndexOf(s))
          typeArray.push(s);
      }

      return typeArray.sort();
    } catch(e) {};

    return undefined;
  },

  // Returns an array of strings or undefined if none are available.
  // The list is filtered by the default_bridge_type pref value.
  get defaultBridges()
  {
    const kPrefName = "extensions.torlauncher.default_bridge_type";
    var filterType = this.getCharPref(kPrefName);
    if (!filterType)
      return undefined;

    try
    {
      var prefBranch = Cc["@mozilla.org/preferences-service;1"]
                           .getService(Ci.nsIPrefService)
                           .getBranch("extensions.torlauncher.default_bridge.");
      var childPrefs = prefBranch.getChildList("", []);
      var bridgeArray = [];
      // The pref service seems to return the values in reverse order, so
      // we compensate by traversing in reverse order.
      for (var i = childPrefs.length - 1; i >= 0; --i)
      {
        var bridgeType = childPrefs[i].replace(/\..*$/, "");
        if (bridgeType == filterType)
        {
          var s = prefBranch.getCharPref(childPrefs[i]);
          if (s)
            bridgeArray.push(s);
        }
      }
410
      this.rearrangeBridges(bridgeArray);
411 412 413 414 415 416

      return bridgeArray;
    } catch(e) {};

    return undefined;
  },
417 418

  // Returns an nsIFile.
419 420
  // If aTorFileType is "control_ipc" or "socks_ipc", aCreate is ignored
  // and there is no requirement that the IPC object exists.
421 422 423 424 425 426 427
  // For all other file types, null is returned if the file does not exist
  // and it cannot be created (it will be created if aCreate is true).
  getTorFile: function(aTorFileType, aCreate)
  {
    if (!aTorFileType)
      return null;

428 429 430 431
    let torFile;  // an nsIFile to be returned
    let path;     // a relative or absolute path that will determine torFile

    let isRelativePath = false;
432 433
    let isUserData = (aTorFileType != "tor") &&
                     (aTorFileType != "torrc-defaults");
434 435 436
    let isControlIPC = ("control_ipc" == aTorFileType);
    let isSOCKSIPC = ("socks_ipc" == aTorFileType);
    let isIPC = isControlIPC || isSOCKSIPC;
437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463
    let checkIPCPathLen = true;

    const kControlIPCFileName = "control.socket";
    const kSOCKSIPCFileName = "socks.socket";
    let extraIPCPathLen = (isSOCKSIPC) ? 2 : 0;
    let ipcFileName;
    if (isControlIPC)
      ipcFileName = kControlIPCFileName;
    else if (isSOCKSIPC)
      ipcFileName = kSOCKSIPCFileName;

    // If this is the first request for an IPC path during this browser
    // session, remove the old temporary directory. This helps to keep /tmp
    // clean if the browser crashes or is killed.
    let ipcDirPath;
    if (isIPC && TLUtilInternal.mIsFirstIPCPathRequest)
    {
      this.cleanupTempDirectories();
      TLUtilInternal.mIsFirstIPCPathRequest = false;
    }
    else
    {
      // Retrieve path for IPC objects (it may have already been determined).
      ipcDirPath = this.getCharPref(TLUtilInternal.kIPCDirPrefName);
    }

    // First, check the _path preference for this file type.
464
    let prefName = "extensions.torlauncher." + aTorFileType + "_path";
465
    path = this.getCharPref(prefName);
466 467 468 469
    if (path)
    {
      let re = (this.isWindows) ?  /^[A-Za-z]:\\/ : /^\//;
      isRelativePath = !re.test(path);
470
      checkIPCPathLen = false; // always try to use path if provided in pref
471
    }
472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515
    else if (isIPC)
    {
      if (ipcDirPath)
      {
        // We have already determined where IPC objects will be placed.
        torFile = Cc['@mozilla.org/file/local;1'].createInstance(Ci.nsIFile);
        torFile.initWithPath(ipcDirPath);
        torFile.append(ipcFileName);
        checkIPCPathLen = false; // already checked.
      }
      else
      {
        // If XDG_RUNTIME_DIR is set, use it as the base directory for IPC
        // objects (e.g., Unix domain sockets) -- assuming it is not too long.
        let env = Cc["@mozilla.org/process/environment;1"]
                    .getService(Ci.nsIEnvironment);
        if (env.exists("XDG_RUNTIME_DIR"))
        {
          let ipcDir = TLUtilInternal._createUniqueIPCDir(
                                               env.get("XDG_RUNTIME_DIR"));
          if (ipcDir)
          {
            let f = ipcDir.clone();
            f.append(ipcFileName);
            if (TLUtilInternal._isIPCPathLengthOK(f.path, extraIPCPathLen))
            {
              torFile = f;
              checkIPCPathLen = false; // no need to check again.

              // Store directory path so it can be reused for other IPC objects
              // and so it can be removed during exit.
              this.setCharPref(TLUtilInternal.kIPCDirPrefName, ipcDir.path);
            }
            else
            {
              // too long; remove the directory that we just created.
              ipcDir.remove(false);
            }
          }
        }
      }
    }

    if (!path && !torFile)
516
    {
517 518
      // No preference and no pre-determined IPC path: use a default path.
      isRelativePath = true;
519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542
      if (TLUtilInternal._isUserDataOutsideOfAppDir)
      {
        // This block is used for the TorBrowser-Data/ case.
        if (this.isWindows)
        {
          if ("tor" == aTorFileType)
            path = "TorBrowser\\Tor\\tor.exe";
          else if ("torrc-defaults" == aTorFileType)
            path = "TorBrowser\\Tor\\torrc-defaults";
          else if ("torrc" == aTorFileType)
            path = "Tor\\torrc";
          else if ("tordatadir" == aTorFileType)
            path = "Tor";
        }
        else if (this.isMac)
        {
          if ("tor" == aTorFileType)
            path = "Contents/Resources/TorBrowser/Tor/tor";
          else if ("torrc-defaults" == aTorFileType)
            path = "Contents/Resources/TorBrowser/Tor/torrc-defaults";
          else if ("torrc" == aTorFileType)
            path = "Tor/torrc";
          else if ("tordatadir" == aTorFileType)
            path = "Tor";
543 544
          else if (isIPC)
            path = "Tor/" + ipcFileName;
545 546 547 548 549 550 551 552 553 554 555
        }
        else // Linux and others.
        {
          if ("tor" == aTorFileType)
            path = "TorBrowser/Tor/tor";
          else if ("torrc-defaults" == aTorFileType)
            path = "TorBrowser/Tor/torrc-defaults";
          else if ("torrc" == aTorFileType)
            path = "Tor/torrc";
          else if ("tordatadir" == aTorFileType)
            path = "Tor";
556 557
          else if (isIPC)
            path = "Tor/" + ipcFileName;
558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582
        }
      }
      else if (this.isWindows)
      {
        // This block is used for the non-TorBrowser-Data/ case.
        if ("tor" == aTorFileType)
          path = "Tor\\tor.exe";
        else if ("torrc-defaults" == aTorFileType)
          path = "Data\\Tor\\torrc-defaults";
        else if ("torrc" == aTorFileType)
          path = "Data\\Tor\\torrc";
        else if ("tordatadir" == aTorFileType)
          path = "Data\\Tor";
      }
      else // Linux, Mac OS and others.
      {
        // This block is also used for the non-TorBrowser-Data/ case.
        if ("tor" == aTorFileType)
          path = "Tor/tor";
        else if ("torrc-defaults" == aTorFileType)
          path = "Data/Tor/torrc-defaults";
        else if ("torrc" == aTorFileType)
          path = "Data/Tor/torrc";
        else if ("tordatadir" == aTorFileType)
          path = "Data/Tor";
583 584
        else if (isIPC)
          path = "Data/Tor/" + ipcFileName;
585 586
      }

587 588 589
      if (!path)
        return null;
    }
590 591 592

    try
    {
593
      if (path)
594
      {
595
        if (isRelativePath)
596
        {
597 598 599 600 601 602 603 604 605 606 607 608 609
          // Turn 'path' into an absolute path.
          if (TLUtilInternal._isUserDataOutsideOfAppDir)
          {
            let baseDir = isUserData ? TLUtilInternal._dataDir
                                     : TLUtilInternal._appDir;
            torFile = baseDir.clone();
          }
          else
          {
            torFile = TLUtilInternal._appDir.clone();
            torFile.append("TorBrowser");
          }
          torFile.appendRelativePath(path);
610 611 612
        }
        else
        {
613 614
          torFile = Cc['@mozilla.org/file/local;1'].createInstance(Ci.nsIFile);
          torFile.initWithPath(path);
615 616
        }

617
        if (!torFile.exists() && !isIPC && aCreate)
618
        {
619 620 621 622 623 624 625 626 627 628 629 630 631
          try
          {
            if ("tordatadir" == aTorFileType)
              torFile.create(torFile.DIRECTORY_TYPE, 0700);
            else
              torFile.create(torFile.NORMAL_FILE_TYPE, 0600);
          }
          catch (e)
          {
            TorLauncherLogger.safelog(4,
                                "unable to create " + torFile.path + ": ", e);
            return null;
          }
632 633 634
        }
      }

635 636
      // If the file exists or an IPC object was requested, normalize the path
      // and return a file object. The control and SOCKS IPC objects will be
637
      // created by tor.
638
      if (torFile.exists() || isIPC)
639
      {
640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662
        try { torFile.normalize(); } catch(e) {}

        // Ensure that the IPC path length is short enough for use by the
        // operating system. If not, create and use a unique directory under
        // /tmp for all IPC objects. The created directory path is stored in
        // a preference so it can be reused for other IPC objects and so it
        // can be removed during exit.
        if (isIPC && checkIPCPathLen &&
            !TLUtilInternal._isIPCPathLengthOK(torFile.path, extraIPCPathLen))
        {
          torFile = TLUtilInternal._createUniqueIPCDir("/tmp");
          if (!torFile)
          {
            TorLauncherLogger.log(4,
                              "failed to create unique directory under /tmp");
            return null;
          }

          this.setCharPref(TLUtilInternal.kIPCDirPrefName, torFile.path);
          torFile.append(ipcFileName);
        }

        return torFile;
663 664
      }

665 666
      TorLauncherLogger.log(4, aTorFileType + " file not found: "
                               + torFile.path);
667 668 669 670
    }
    catch(e)
    {
      TorLauncherLogger.safelog(4, "getTorFile " + aTorFileType +
671
                                   " failed for " + path + ": ", e);
672 673 674 675
    }

    return null;  // File not found or error (logged above).
  }, // getTorFile()
676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691

  cleanupTempDirectories: function()
  {
    try
    {
      let dirPath = this.getCharPref(TLUtilInternal.kIPCDirPrefName);
      this.clearUserPref(TLUtilInternal.kIPCDirPrefName);
      if (dirPath)
      {
        let f = Cc['@mozilla.org/file/local;1'].createInstance(Ci.nsIFile);
        f.initWithPath(dirPath);
        if (f.exists())
          f.remove(false); // Remove directory if it is empty
      }
    } catch(e) {}
  },
692 693 694 695 696 697 698 699
};


Object.freeze(TorLauncherUtil);


let TLUtilInternal =  // Private
{
700 701
  kThunderbirdID: "{3550f703-e582-4d05-9a08-453d09bdfdc6}",
  kInstantbirdID: "{33cb9019-c295-46dd-be21-8c4936574bee}",
702
  kIPCDirPrefName: "extensions.torlauncher.tmp_ipc_dir",
703

704 705 706
  mPrefsSvc : null,
  mStringBundle : null,
  mOS : "",
707 708 709 710 711
  // mIsUserDataOutsideOfAppDir is true when TorBrowser-Data is used.
  mIsUserDataOutsideOfAppDir: undefined, // Boolean (cached; access via
                                         //   this._isUserDataOutsideOfAppDir)
  mAppDir: null,        // nsIFile (cached; access via this._appDir)
  mDataDir: null,       // nsIFile (cached; access via this._dataDir)
712
  mIsFirstIPCPathRequest : true,
713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741

  _init: function()
  {
    this.mPrefsSvc = Cc["@mozilla.org/preferences-service;1"]
                       .getService(Ci.nsIPrefBranch);
  },

  get _stringBundle()
  {
    if (!this.mStringBundle)
    {
      this.mStringBundle = Cc["@mozilla.org/intl/stringbundle;1"]
                             .getService(Ci.nsIStringBundleService)
                             .createBundle(kPropBundleURI);
    }

    return this.mStringBundle;
  },

  get _OS()
  {
    if (!this.mOS) try
    {
      var xr = Cc["@mozilla.org/xre/app-info;1"].getService(Ci.nsIXULRuntime);
      this.mOS = xr.OS;
    } catch (e) {}

    return this.mOS;
  },
742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824

  get _isMac()
  {
    return ("Darwin" == this._OS);
  },

  get _isUserDataOutsideOfAppDir()
  {
    if (this.mIsUserDataOutsideOfAppDir == undefined)
    {
      // Determine if we are using a "side-by-side" data model by checking
      // whether the user profile is outside of the app directory.
      try
      {
        let ds = Cc["@mozilla.org/file/directory_service;1"]
                        .getService(Ci.nsIProperties);
        let profDir = ds.get("ProfD", Ci.nsIFile);
        this.mIsUserDataOutsideOfAppDir = !this._appDir.contains(profDir);
      }
      catch (e)
      {
        this.mIsUserDataOutsideOfAppDir = false;
      }
    }

    return this.mIsUserDataOutsideOfAppDir;
  }, // get _isUserDataOutsideOfAppDir

  // Returns an nsIFile that points to the application directory.
  // May throw.
  get _appDir()
  {
    if (!this.mAppDir)
    {
      let topDir = Cc["@mozilla.org/file/directory_service;1"]
                    .getService(Ci.nsIProperties).get("CurProcD", Ci.nsIFile);
      let appInfo = Cc["@mozilla.org/xre/app-info;1"]
                      .getService(Ci.nsIXULAppInfo);
      // On Linux and Windows, we want to return the Browser/ directory.
      // Because topDir ("CurProcD") points to Browser/browser on those
      // platforms, we need to go up one level.
      // On Mac OS, we want to return the TorBrowser.app/ directory.
      // Because topDir points to Contents/Resources/browser on Mac OS,
      // we need to go up 3 levels.
      let tbbBrowserDepth = (this._isMac) ? 3 : 1;
      if ((appInfo.ID == this.kThunderbirdID) ||
          (appInfo.ID == this.kInstantbirdID))
      {
        // On Thunderbird/Instantbird, the topDir is the root dir and not
        // browser/, so we need to iterate one level less than Firefox.
        --tbbBrowserDepth;
      }

      while (tbbBrowserDepth > 0)
      {
        let didRemove = (topDir.leafName != ".");
        topDir = topDir.parent;
        if (didRemove)
          tbbBrowserDepth--;
      }

      this.mAppDir = topDir;
    }

    return this.mAppDir;
  }, // get _appDir

  // Returns an nsIFile that points to the TorBrowser-Data/ directory.
  // This function is only used when this._isUserDataOutsideOfAppDir == true.
  // May throw.
  get _dataDir()
  {
    if (!this.mDataDir)
    {
      let ds = Cc["@mozilla.org/file/directory_service;1"]
                      .getService(Ci.nsIProperties);
      let profDir = ds.get("ProfD", Ci.nsIFile);
      this.mDataDir = profDir.parent.parent;
    }

    return this.mDataDir;
  }, // get _dataDir

825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856
  // Return true if aPath is short enough to be used as an IPC object path,
  // e.g., for a Unix domain socket path. aExtraLen is the "delta" necessary
  // to accommodate other IPC objects that have longer names; it is used to
  // account for "control.socket" vs. "socks.socket" (we want to ensure that
  // all IPC objects are placed in the same parent directory unless the user
  // has set prefs or env vars to explicitly specify the path for an object).
  // We enforce a maximum length of 100 because all operating systems allow
  // at least 100 characters for Unix domain socket paths.
  _isIPCPathLengthOK: function(aPath, aExtraLen)
  {
    const kMaxIPCPathLen = 100;
    return aPath && ((aPath.length + aExtraLen) <= kMaxIPCPathLen);
  },

  // Returns an nsIFile or null if a unique directory could not be created.
  _createUniqueIPCDir: function(aBasePath)
  {
    try
    {
      let d = Cc['@mozilla.org/file/local;1'].createInstance(Ci.nsIFile);
      d.initWithPath(aBasePath);
      d.append("Tor");
      d.createUnique(Ci.nsIFile.DIRECTORY_TYPE, 0700);
      return d;
    }
    catch (e)
    {
      TorLauncherLogger.safelog(4, "_createUniqueIPCDir failed for "
                                   + aBasePath + ": ", e);
      return null;
    }
  },
857 858 859 860 861 862 863 864 865 866 867 868 869 870

  _isWindowVisible: function(aWindow)
  {
    if (!aWindow)
      return false;

    try {
      let winUtils = aWindow.QueryInterface(Ci.nsIInterfaceRequestor)
                            .getInterface(Ci.nsIDOMWindowUtils);
      return winUtils.isParentWindowMainWidgetVisible;
    } catch(e) {}

    return false;
  },
871 872 873 874
};


TLUtilInternal._init();