torbrowser-launcher

   1 #!/usr/bin/env python
   2 from twisted.internet import gtk2reactor
   3 gtk2reactor.install()
   4 from twisted.internet import reactor
   5
   6 import pygtk
   7 pygtk.require('2.0')
   8 import gtk
   9
  10 import os, sys, subprocess, locale, urllib2, gobject, time, pickle, json
  11
  12 from twisted.web.client import Agent, ResponseDone
  13 from twisted.web.http_headers import Headers
  14 from twisted.internet.protocol import Protocol
  15 from twisted.internet.ssl import ClientContextFactory
  16
  17 from OpenSSL.SSL import Context, VERIFY_PEER, VERIFY_FAIL_IF_NO_PEER_CERT
  18 from OpenSSL.crypto import load_certificate, FILETYPE_PEM
  19
  20 class VerifyTorProjectCert(ClientContextFactory):
  21
  22     def __init__(self, torproject_pem):
  23         self.torproject_ca = load_certificate(FILETYPE_PEM, open(torproject_pem, 'r').read())
  24
  25     def getContext(self, host, port):
  26         ctx = ClientContextFactory.getContext(self)
  27         ctx.set_verify_depth(0)
  28         ctx.set_verify(VERIFY_PEER | VERIFY_FAIL_IF_NO_PEER_CERT, self.verifyHostname)
  29         return ctx
  30
  31     def verifyHostname(self, connection, cert, errno, depth, preverifyOK):
  32         return cert.digest('sha256') == self.torproject_ca.digest('sha256')
  33
  34
  35 class TorBrowserLauncher:
  36     def __init__(self):
  37         # initialize the app
  38         self.set_gui(None, '', [])
  39         self.discover_arch_lang()
  40         self.build_paths()
  41         self.mkdir(self.paths['dir']['download'])
  42         self.mkdir(self.paths['dir']['tbb'])
  43
  44         # allow buttons to have icons
  45         try:
  46             settings = gtk.settings_get_default()
  47             settings.props.gtk_button_images = True
  48         except:
  49             pass
  50
  51         self.launch_gui = True
  52
  53         # if we haven't already hit an error
  54         if self.gui != 'error':
  55             # load settings
  56             if self.load_settings():
  57                 self.build_paths(self.settings['latest_version'])
  58
  59                 # how long was it since the last update check?
  60                 # 86400 seconds = 24 hours
  61                 current_timestamp = int(time.time())
  62                 if current_timestamp - self.settings['last_update_check_timestamp'] >= 86400:
  63                     # check for update
  64                     print 'Checking for update'
  65                     self.set_gui('task', "Checking for Tor Browser update.",
  66                         ['download_update_check',
  67                          'attempt_update'])
  68
  69                 else:
  70                     # no need to check for update
  71                     print 'Checked for update within 24 hours, skipping'
  72                     self.start_launcher()
  73
  74             else:
  75                 self.set_gui('error', "Error loading settings. Delete ~/.torbrowser and try again.", [])
  76
  77         if self.launch_gui:
  78             # set up the window
  79             self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
  80             self.window.set_title("Tor Browser")
  81             self.window.set_position(gtk.WIN_POS_CENTER)
  82             self.window.set_border_width(10)
  83             self.window.connect("delete_event", self.delete_event)
  84             self.window.connect("destroy", self.destroy)
  85
  86             # build the rest of the UI
  87             self.build_ui()
  88             reactor.run()
  89
  90     # download or run TBB
  91     def start_launcher(self):
  92       # is TBB already installed?
  93       if os.path.isfile(self.paths['file']['start']) and os.access(self.paths['file']['start'], os.X_OK):
  94         if self.settings['installed_version'] == self.settings['latest_version']:
  95           # current version of tbb is installed, launch it
  96           self.run(False)
  97           self.launch_gui = False
  98         elif self.settings['installed_version'] < self.settings['latest_version']:
  99           # there is a tbb upgrade available
 100           self.set_gui('task', "Your Tor Browser is out of date.",
 101             ['download_tarball',
 102              'download_tarball_sig',
 103              'verify',
 104              'extract',
 105              'run'])
 106         else:
 107           # for some reason the installed tbb is newer than the current version?
 108           self.set_gui('error', "Something is wrong. The version of Tor Browser Bundle you have installed is newer than the current version?", [])
 109
 110       # not installed
 111       else:
 112           # are the tarball and sig already downloaded?
 113           if os.path.isfile(self.paths['file']['tarball']) and os.path.isfile(self.paths['file']['tarball_sig']):
 114               # start the gui with verify
 115               self.set_gui('task', "Installing Tor Browser.",
 116                   ['verify',
 117                    'extract',
 118                    'run'])
 119
 120           # first run
 121           else:
 122               self.set_gui('task', "Downloading and installing Tor Browser.",
 123                   ['download_tarball',
 124                    'download_tarball_sig',
 125                    'verify',
 126                    'extract',
 127                    'run'])
 128
 129     # discover the architecture and language
 130     def discover_arch_lang(self):
 131         # figure out the architecture
 132         (sysname, nodename, release, version, machine) = os.uname()
 133         self.architecture = machine
 134
 135         # figure out the language
 136         available_languages = ['en-US', 'ar', 'de', 'es-ES', 'fa', 'fr', 'it', 'ko', 'nl', 'pl', 'pt-PT', 'ru', 'vi', 'zh-CN']
 137         default_locale = locale.getdefaultlocale()[0]
 138         if default_locale == None:
 139             self.language = 'en-US'
 140         else:
 141             self.language = default_locale.replace('_', '-')
 142             if self.language not in available_languages:
 143                 self.language = self.language.split('-')[0]
 144                 if self.language not in available_languages:
 145                     for l in available_languages:
 146                         if l[0:2] == self.language:
 147                             self.language = l
 148             # if language isn't available, default to english
 149             if self.language not in available_languages:
 150                 self.language = 'en-US'
 151
 152     # build all relevant paths
 153     def build_paths(self, tbb_version = None):
 154         homedir = os.getenv('HOME')
 155         if not homedir:
 156             homedir = '/tmp/.torbrowser-'+os.getenv('USER')
 157             if os.path.exists(homedir) == False:
 158                 try:
 159                     os.mkdir(homedir, 0700)
 160                 except:
 161                     self.set_gui('error', "Error creating %s" % homedir, [], False)
 162         if not os.access(homedir, os.W_OK):
 163             self.set_gui('error', "%s is not writable" % homedir, [], False)
 164
 165         tbb_data = '%s/.torbrowser' % homedir
 166
 167         if tbb_version:
 168             tarball_filename = 'tor-browser-gnu-linux-'+self.architecture+'-'+tbb_version+'-dev-'+self.language+'.tar.gz'
 169             self.paths['file']['tarball'] = tbb_data+'/download/'+tarball_filename
 170             self.paths['file']['tarball_sig'] = tbb_data+'/download/'+tarball_filename+'.asc'
 171             self.paths['url']['tarball'] = 'https://www.torproject.org/dist/torbrowser/linux/'+tarball_filename
 172             self.paths['url']['tarball_sig'] = 'https://www.torproject.org/dist/torbrowser/linux/'+tarball_filename+'.asc'
 173             self.paths['filename']['tarball'] = tarball_filename
 174             self.paths['filename']['tarball_sig'] = tarball_filename+'.asc'
 175
 176         else:
 177             self.paths = {
 178                 'dir': {
 179                     'data': tbb_data,
 180                     'download': tbb_data+'/download',
 181                     'tbb': tbb_data+'/tbb/'+self.architecture,
 182                     'gpg': tbb_data+'/gpgtmp'
 183                 },
 184                 'file': {
 185                     'settings': tbb_data+'/settings',
 186                     'version': tbb_data+'/version',
 187                     'start': tbb_data+'/tbb/'+self.architecture+'/tor-browser_'+self.language+'/start-tor-browser',
 188                     'update_check': tbb_data+'/download/RecommendedTBBVersions',
 189                     'verify': '/usr/share/torbrowser-launcher/verify.sh',
 190                     'torproject_pem': '/usr/share/torbrowser-launcher/torproject.pem'
 191                 },
 192                 'url': {
 193                     'update_check': 'https://check.torproject.org/RecommendedTBBVersions'
 194                 },
 195                 'filename': {}
 196             }
 197
 198     # create a directory
 199     def mkdir(self, path):
 200         try:
 201             if os.path.exists(path) == False:
 202                 os.makedirs(path, 0700)
 203         except:
 204             self.set_gui('error', "Cannot create directory %s" % path, [], False)
 205         if not os.access(path, os.W_OK):
 206             self.set_gui('error', "%s is not writable" % path, [], False)
 207
 208     # there are different GUIs that might appear, this sets which one we want
 209     def set_gui(self, gui, message, tasks, autostart=True):
 210         self.gui = gui
 211         self.gui_message = message
 212         self.gui_tasks = tasks
 213         self.gui_task_i = 0
 214         self.gui_autostart = autostart
 215
 216     # set all gtk variables to False
 217     def clear_ui(self):
 218         if hasattr(self, 'box'):
 219             self.box.destroy()
 220         self.box = False
 221
 222         self.label = False
 223         self.progressbar = False
 224         self.button_box = False
 225         self.start_button = False
 226         self.exit_button = False
 227
 228     # build the application's UI
 229     def build_ui(self):
 230         self.box = gtk.VBox(False, 20)
 231         self.window.add(self.box)
 232
 233         if self.gui == 'error':
 234             # labels
 235             self.label = gtk.Label( self.gui_message )
 236             self.label.set_line_wrap(True)
 237             self.box.pack_start(self.label, True, True, 0)
 238             self.label.show()
 239
 240             #self.label2 = gtk.Label("You can fix the problem by deleting:\n"+self.paths['dir']['data']+"\n\nHowever, you will lose all your bookmarks and other Tor Browser preferences.")
 241             #self.label2.set_line_wrap(True)
 242             #self.box.pack_start(self.label2, True, True, 0)
 243             #self.label2.show()
 244
 245             # exit button
 246             exit_image = gtk.Image()
 247             exit_image.set_from_stock(gtk.STOCK_CANCEL, gtk.ICON_SIZE_BUTTON)
 248             self.exit_button = gtk.Button("Exit")
 249             self.exit_button.set_image(exit_image)
 250             self.exit_button.connect("clicked", self.destroy, None)
 251             self.box.add(self.exit_button)
 252             self.exit_button.show()
 253
 254         elif self.gui == 'task':
 255             # label
 256             self.label = gtk.Label( self.gui_message )
 257             self.label.set_line_wrap(True)
 258             self.box.pack_start(self.label, True, True, 0)
 259             self.label.show()
 260
 261             # progress bar
 262             self.progressbar = gtk.ProgressBar(adjustment=None)
 263             self.progressbar.set_orientation(gtk.PROGRESS_LEFT_TO_RIGHT)
 264             self.progressbar.set_pulse_step(0.01)
 265             self.box.pack_start(self.progressbar, True, True, 0)
 266
 267             # button box
 268             self.button_box = gtk.HButtonBox()
 269             self.button_box.set_layout(gtk.BUTTONBOX_SPREAD)
 270             self.box.pack_start(self.button_box, True, True, 0)
 271             self.button_box.show()
 272
 273             # start button
 274             start_image = gtk.Image()
 275             start_image.set_from_stock(gtk.STOCK_APPLY, gtk.ICON_SIZE_BUTTON)
 276             self.start_button = gtk.Button("Start")
 277             self.start_button.set_image(start_image)
 278             self.start_button.connect("clicked", self.start, None)
 279             self.button_box.add(self.start_button)
 280             if not self.gui_autostart:
 281               self.start_button.show()
 282
 283             # exit button
 284             exit_image = gtk.Image()
 285             exit_image.set_from_stock(gtk.STOCK_CANCEL, gtk.ICON_SIZE_BUTTON)
 286             self.exit_button = gtk.Button("Exit")
 287             self.exit_button.set_image(exit_image)
 288             self.exit_button.connect("clicked", self.destroy, None)
 289             self.button_box.add(self.exit_button)
 290             self.exit_button.show()
 291
 292         self.box.show()
 293         self.window.show()
 294
 295         if self.gui_autostart:
 296           self.start(None)
 297
 298     # start button clicked, begin tasks
 299     def start(self, widget, data=None):
 300         # disable the start button
 301         if self.start_button:
 302             self.start_button.set_sensitive(False)
 303
 304         # start running tasks
 305         self.run_task()
 306
 307     # run the next task in the task list
 308     def run_task(self):
 309         self.refresh_gtk()
 310
 311         if self.gui_task_i >= len(self.gui_tasks):
 312             self.destroy(False)
 313             return
 314
 315         task = self.gui_tasks[self.gui_task_i]
 316
 317         # get ready for the next task
 318         self.gui_task_i += 1
 319
 320         if task == 'download_update_check':
 321             print 'Downloading '+self.paths['url']['update_check']
 322             self.download('update check', self.paths['url']['update_check'], self.paths['file']['update_check'])
 323
 324         if task == 'attempt_update':
 325             print 'Checking to see if update it needed'
 326             self.attempt_update()
 327
 328         elif task == 'download_tarball':
 329             print 'Downloading '+self.paths['url']['tarball']
 330             self.download('tarball', self.paths['url']['tarball'], self.paths['file']['tarball'])
 331
 332         elif task == 'download_tarball_sig':
 333             print 'Downloading '+self.paths['url']['tarball_sig']
 334             self.download('signature', self.paths['url']['tarball_sig'], self.paths['file']['tarball_sig'])
 335
 336         elif task == 'verify':
 337             print 'Verifying signature'
 338             self.verify()
 339
 340         elif task == 'extract':
 341             print 'Extracting '+self.paths['filename']['tarball']
 342             self.extract()
 343
 344         elif task == 'run':
 345             print 'Running '+self.paths['file']['start']
 346             self.run()
 347
 348         elif task == 'start_over':
 349             print 'Starting download over again'
 350             self.start_over()
 351
 352     def response_received(self, response):
 353         class FileDownloader(Protocol):
 354             def __init__(self, file, total, progress, done_cb):
 355                 self.file = file
 356                 self.total = total
 357                 self.so_far = 0
 358                 self.progress = progress
 359                 self.all_done = done_cb
 360
 361             def dataReceived(self, bytes):
 362                 self.file.write(bytes)
 363                 self.so_far += len(bytes)
 364                 percent = float(self.so_far) / float(self.total)
 365                 self.progress.set_fraction(percent)
 366                 amount = float(self.so_far)
 367                 units = "bytes"
 368                 for (size, unit) in [(1024 * 1024, "MiB"), (1024, "KiB")]:
 369                     if amount > size:
 370                         units = unit
 371                         amount = amount / float(size)
 372                         break
 373
 374                 self.progress.set_text('Downloaded %2.1f%% (%2.1f %s)' % ((percent * 100.0), amount, units))
 375
 376             def connectionLost(self, reason):
 377                 print 'Finished receiving body:', reason.getErrorMessage()
 378                 self.all_done(reason)
 379
 380         dl = FileDownloader(self.file_download, response.length, self.progressbar, self.response_finished)
 381         response.deliverBody(dl)
 382
 383     def response_finished(self, msg):
 384         if msg.check(ResponseDone):
 385             self.file_download.close()
 386             # next task!
 387             self.run_task()
 388
 389         else:
 390             print "FINISHED", msg
 391             ## FIXME handle errors
 392
 393     def download_error(self, f):
 394         print "Download error", f
 395         self.set_gui('error', "Error starting download:\n\n%s\n\nAre you connected to the internet?" % f.value, [], False)
 396         self.clear_ui()
 397         self.build_ui()
 398
 399     def download(self, name, url, path):
 400         # initialize the progress bar
 401         self.progressbar.set_fraction(0)
 402         self.progressbar.set_text('Downloading '+name)
 403         self.progressbar.show()
 404         self.refresh_gtk()
 405
 406         agent = Agent(reactor, VerifyTorProjectCert(self.paths['file']['torproject_pem']))
 407         d = agent.request('GET', url,
 408                           Headers({'User-Agent': ['torbrowser-launcher']}),
 409                           None)
 410
 411         self.file_download = open(path, 'w')
 412         d.addCallback(self.response_received).addErrback(self.download_error)
 413
 414     def attempt_update(self):
 415         # load the update check file
 416         try:
 417             versions = json.load(open(self.paths['file']['update_check']))
 418             latest_version = None
 419
 420             end = '-Linux'
 421             for version in versions:
 422                 if str(version).find(end) != -1:
 423                     latest_version = str(version)
 424
 425             if latest_version:
 426                 self.settings['latest_version'] = latest_version[:-len(end)]
 427                 self.settings['last_update_check_timestamp'] = int(time.time())
 428                 self.save_settings()
 429                 self.build_paths(self.settings['latest_version'])
 430                 self.start_launcher()
 431
 432             else:
 433                 # failed to find the latest version
 434                 self.set_gui('error', "Error checking for updates.", [], False)
 435
 436         except:
 437             # not a valid JSON object
 438             self.set_gui('error', "Error checking for updates.", [], False)
 439
 440         # now start over
 441         self.clear_ui()
 442         self.build_ui()
 443
 444     def verify(self):
 445         # initialize the progress bar
 446         self.progressbar.set_fraction(0)
 447         self.progressbar.set_text('Verifying Signature')
 448         self.progressbar.show()
 449
 450         p = subprocess.Popen([self.paths['file']['verify'], self.paths['dir']['gpg'], self.paths['file']['tarball_sig']], stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
 451         self.pulse_until_process_exits(p)
 452
 453         output = p.stdout.read()
 454
 455         if 'Good signature' in output:
 456             self.run_task()
 457         else:
 458             self.progressbar.hide()
 459             self.label.set_text("SIGNATURE VERIFICATION FAILED!\n\nYou might be under attack, or there might just be a networking problem. Click Start try the download again.")
 460             self.gui_tasks = ['start_over']
 461             self.gui_task_i = 0
 462             self.start_button.show()
 463             self.start_button.set_sensitive(True)
 464
 465     def extract(self):
 466         # initialize the progress bar
 467         self.progressbar.set_fraction(0)
 468         self.progressbar.set_text('Installing')
 469         self.progressbar.show()
 470
 471         p = subprocess.Popen(['tar', '-xf', self.paths['file']['tarball'], '-C', self.paths['dir']['tbb']], stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
 472         self.pulse_until_process_exits(p)
 473
 474         # installation is finished, so save installed_version
 475         self.settings['installed_version'] = self.settings['latest_version']
 476         self.save_settings()
 477
 478         self.run_task()
 479
 480     def run(self, run_next_task = True):
 481         subprocess.Popen([self.paths['file']['start']])
 482         if run_next_task:
 483             self.run_task()
 484
 485     # make the progress bar pulse until process p (a Popen object) finishes
 486     def pulse_until_process_exits(self, p):
 487         while p.poll() == None:
 488             time.sleep(0.01)
 489             self.progressbar.pulse()
 490             self.refresh_gtk()
 491
 492     # start over and download TBB again
 493     def start_over(self):
 494         self.label.set_text("Downloading Tor Browser Bundle over again.")
 495         self.gui_tasks = ['download_tarball', 'download_tarball_sig', 'verify', 'extract', 'run']
 496         self.gui_task_i = 0
 497         self.start(None)
 498
 499     # load settings
 500     def load_settings(self):
 501         if os.path.isfile(self.paths['file']['settings']):
 502             self.settings = pickle.load(open(self.paths['file']['settings']))
 503             # sanity checks
 504             if not 'installed_version' in self.settings:
 505                 return False
 506             if not 'latest_version' in self.settings:
 507                 return False
 508             if not 'last_update_check_timestamp' in self.settings:
 509                 return False
 510         else:
 511             self.settings = {
 512                 'installed_version': False,
 513                 'latest_version': '0',
 514                 'last_update_check_timestamp': 0
 515             }
 516             self.save_settings()
 517         return True
 518
 519     # save settings
 520     def save_settings(self):
 521         pickle.dump(self.settings, open(self.paths['file']['settings'], 'w'))
 522         return True
 523
 524     # refresh gtk
 525     def refresh_gtk(self):
 526         while gtk.events_pending():
 527             gtk.main_iteration(False)
 528
 529     # exit
 530     def delete_event(self, widget, event, data=None):
 531         return False
 532     def destroy(self, widget, data=None):
 533         if hasattr(self, 'file_download'):
 534             self.file_download.close()
 535         reactor.stop()
 536
 537 if __name__ == "__main__":
 538     tor_browser_launcher_version = '0.1'
 539
 540     print 'Tor Browser Launcher'
 541     print 'version %s' % (tor_browser_launcher_version)
 542     print 'https://github.com/micahflee/torbrowser-launcher'
 543
 544     app = TorBrowserLauncher()
 545