torbrowser-launcher

   1 #!/usr/bin/env python
   2
   3 from twisted.internet import gtk2reactor
   4 gtk2reactor.install()
   5 from twisted.internet import reactor
   6
   7 import pygtk
   8 pygtk.require('2.0')
   9 import gtk
  10
  11 import os, sys, subprocess, locale, urllib2, gobject, time
  12
  13 from twisted.web.client import Agent, ResponseDone
  14 from twisted.web.http_headers import Headers
  15 from twisted.internet.protocol import Protocol
  16 from twisted.internet.ssl import ClientContextFactory
  17
  18 from OpenSSL.SSL import Context, VERIFY_PEER, VERIFY_FAIL_IF_NO_PEER_CERT
  19 from OpenSSL.crypto import load_certificate, FILETYPE_PEM
  20
  21 class VerifyTorProjectCert(ClientContextFactory):
  22
  23     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, current_tbb_version):
  37     # initialize the app
  38     self.current_tbb_version = current_tbb_version
  39     self.discover_arch_lang()
  40     self.build_paths()
  41     self.mkdirs()
  42
  43     launch_gui = True
  44
  45     # is TBB already installed?
  46     if os.path.isfile(self.paths['file']['start']) and os.access(self.paths['file']['start'], os.X_OK):
  47       # does the version file exist?
  48       if os.path.isfile(self.paths['file']['version']):
  49         installed_tbb_version = open(self.paths['file']['version']).read().strip()
  50
  51         if installed_tbb_version == current_tbb_version:
  52           # current version is tbb is installed, launch it
  53           self.run(False)
  54           launch_gui = False
  55         elif installed_tbb_version < self.current_tbb_version:
  56           # there is a tbb upgrade available
  57           self.set_gui('task', "Your Tor Browser is out of date.",
  58             ['download_tarball',
  59              'download_tarball_sig',
  60              'verify',
  61              'extract',
  62              'run'])
  63         else:
  64           # for some reason the installed tbb is newer than the current version?
  65           self.set_gui('error', "Something is wrong. The version of Tor Browser Bundle you have installed is newer than the current version?", [])
  66
  67       else:
  68         # if tbb is installed but the version file doesn't exist, something is wrong
  69         self.set_gui('error', "Something is wrong. You have the Tor Browser Bundle installed, but the version file is missing.", [])
  70
  71     # not installed
  72     else:
  73       # save the current version to the file
  74       open(self.paths['file']['version'], 'w').write(self.current_tbb_version)
  75
  76       # are the tarball and sig already downloaded?
  77       if os.path.isfile(self.paths['file']['tarball']) and os.path.isfile(self.paths['file']['tarball_sig']):
  78         # start the gui with verify
  79         self.set_gui('task', "Installing Tor Browser.",
  80           ['verify',
  81            'extract',
  82            'run'])
  83
  84       # first run
  85       else:
  86         self.set_gui('task', "Downloading and installing Tor Browser.",
  87           ['download_tarball',
  88            'download_tarball_sig',
  89            'verify',
  90            'extract',
  91            'run'])
  92
  93     if launch_gui:
  94       self.build_ui()
  95       reactor.run()
  96
  97   # discover the architecture and language
  98   def discover_arch_lang(self):
  99     # figure out the architecture
 100     (sysname, nodename, release, version, machine) = os.uname()
 101     self.architecture = machine
 102
 103     # figure out the language
 104     available_languages = ['en-US', 'ar', 'de', 'es-ES', 'fa', 'fr', 'it', 'ko', 'nl', 'pl', 'pt-PT', 'ru', 'vi', 'zh-CN']
 105     default_locale = locale.getdefaultlocale()[0]
 106     if default_locale == None:
 107       self.language = 'en-US'
 108     else:
 109       self.language = default_locale.replace('_', '-')
 110       if self.language not in available_languages:
 111         self.language = self.language.split('-')[0]
 112         if self.language not in available_languages:
 113           for l in available_languages:
 114             if l[0:2] == self.language:
 115               self.language = l
 116       # if language isn't available, default to english
 117       if self.language not in available_languages:
 118         self.language = 'en-US'
 119
 120   # build all relevant paths
 121   def build_paths(self):
 122     tbb_data = os.getenv('HOME')+'/.torbrowser'
 123     tarball_filename = 'tor-browser-gnu-linux-'+self.architecture+'-'+self.current_tbb_version+'-dev-'+self.language+'.tar.gz'
 124
 125     self.paths = {
 126       'dir': {
 127         'data': tbb_data,
 128         'download': tbb_data+'/download',
 129         'tbb': tbb_data+'/tbb/'+self.architecture,
 130         'gpg': tbb_data+'/gpgtmp'
 131       },
 132       'file': {
 133         'version': tbb_data+'/version',
 134         'start': tbb_data+'/tbb/'+self.architecture+'/tor-browser_'+self.language+'/start-tor-browser',
 135         'tarball': tbb_data+'/download/'+tarball_filename,
 136         'tarball_sig': tbb_data+'/download/'+tarball_filename+'.asc',
 137         'verify': '/usr/share/torbrowser-launcher/verify.sh'
 138       },
 139       'url': {
 140         'tarball': 'https://www.torproject.org/dist/torbrowser/linux/'+tarball_filename,
 141         'tarball_sig': 'https://www.torproject.org/dist/torbrowser/linux/'+tarball_filename+'.asc'
 142       },
 143       'filename': {
 144         'tarball': tarball_filename,
 145         'tarball_sig': tarball_filename+'.asc'
 146       }
 147     }
 148
 149   # create directories that don't exist
 150   def mkdirs(self):
 151     if os.path.exists(self.paths['dir']['download']) == False:
 152       os.makedirs(self.paths['dir']['download'])
 153     if os.path.exists(self.paths['dir']['tbb']) == False:
 154       os.makedirs(self.paths['dir']['tbb'])
 155
 156   # there are different GUIs that might appear, this sets which one we want
 157   def set_gui(self, gui, message, tasks, autostart=True):
 158     self.gui = gui
 159     self.gui_message = message
 160     self.gui_tasks = tasks
 161     self.gui_autostart = autostart
 162
 163   # build the application's UI
 164   def build_ui(self):
 165     self.timer = False
 166
 167     # allow buttons to have icons
 168     try:
 169       settings = gtk.settings_get_default()
 170       settings.props.gtk_button_images = True
 171     except:
 172       pass
 173
 174     # set up the window
 175     self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
 176     self.window.set_title("Tor Browser")
 177     self.window.set_position(gtk.WIN_POS_CENTER)
 178     self.window.set_border_width(10)
 179     self.window.connect("delete_event", self.delete_event)
 180     self.window.connect("destroy", self.destroy)
 181
 182     self.box = gtk.VBox(False, 20)
 183     self.window.add(self.box)
 184
 185     if self.gui == 'error':
 186       # labels
 187       self.label1 = gtk.Label( self.gui_message )
 188       self.label1.set_line_wrap(True)
 189       self.box.pack_start(self.label1, True, True, 0)
 190       self.label1.show()
 191
 192       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.")
 193       self.label2.set_line_wrap(True)
 194       self.box.pack_start(self.label2, True, True, 0)
 195       self.label2.show()
 196
 197       # exit button
 198       exit_image = gtk.Image()
 199       exit_image.set_from_stock(gtk.STOCK_CANCEL, gtk.ICON_SIZE_BUTTON)
 200       self.exit_button = gtk.Button("Exit")
 201       self.exit_button.set_image(exit_image)
 202       self.exit_button.connect("clicked", self.destroy, None)
 203       self.box.add(self.exit_button)
 204       self.exit_button.show()
 205
 206     elif self.gui == 'task':
 207       # label
 208       self.label = gtk.Label( self.gui_message )
 209       self.label.set_line_wrap(True)
 210       self.box.pack_start(self.label, True, True, 0)
 211       self.label.show()
 212
 213       # progress bar
 214       self.progressbar = gtk.ProgressBar(adjustment=None)
 215       self.progressbar.set_orientation(gtk.PROGRESS_LEFT_TO_RIGHT)
 216       self.progressbar.set_pulse_step(0.01)
 217       self.box.pack_start(self.progressbar, True, True, 0)
 218
 219       # button box
 220       self.button_box = gtk.HButtonBox()
 221       self.button_box.set_layout(gtk.BUTTONBOX_SPREAD)
 222       self.box.pack_start(self.button_box, True, True, 0)
 223       self.button_box.show()
 224
 225       # start button
 226       start_image = gtk.Image()
 227       start_image.set_from_stock(gtk.STOCK_APPLY, gtk.ICON_SIZE_BUTTON)
 228       self.start_button = gtk.Button("Start")
 229       self.start_button.set_image(start_image)
 230       self.start_button.connect("clicked", self.start, None)
 231       self.button_box.add(self.start_button)
 232       if not self.gui_autostart:
 233         self.start_button.show()
 234
 235       # exit button
 236       exit_image = gtk.Image()
 237       exit_image.set_from_stock(gtk.STOCK_CANCEL, gtk.ICON_SIZE_BUTTON)
 238       self.exit_button = gtk.Button("Exit")
 239       self.exit_button.set_image(exit_image)
 240       self.exit_button.connect("clicked", self.destroy, None)
 241       self.button_box.add(self.exit_button)
 242       self.exit_button.show()
 243
 244     self.box.show()
 245     self.window.show()
 246
 247     if self.gui_autostart:
 248       self.start(None)
 249
 250   # start button clicked, begin tasks
 251   def start(self, widget, data=None):
 252     # disable the start button
 253     self.start_button.set_sensitive(False)
 254
 255     # start running tasks
 256     self.gui_task_i = 0
 257     self.run_task()
 258
 259   # run the next task in the task list
 260   def run_task(self):
 261     self.refresh_gtk()
 262
 263     if self.gui_task_i >= len(self.gui_tasks):
 264       self.destroy(False)
 265       return
 266
 267     task = self.gui_tasks[self.gui_task_i]
 268
 269     # get ready for the next task
 270     self.gui_task_i += 1
 271
 272     if task == 'download_tarball':
 273       print 'Downloading '+self.paths['url']['tarball']
 274       self.download('tarball', self.paths['url']['tarball'], self.paths['file']['tarball'])
 275
 276     elif task == 'download_tarball_sig':
 277       print 'Downloading '+self.paths['url']['tarball_sig']
 278       self.download('signature', self.paths['url']['tarball_sig'], self.paths['file']['tarball_sig'])
 279
 280     elif task == 'verify':
 281       print 'Verifying signature'
 282       self.verify()
 283
 284     elif task == 'extract':
 285       print 'Extracting '+self.paths['filename']['tarball']
 286       self.extract()
 287
 288     elif task == 'run':
 289       print 'Running '+self.paths['file']['start']
 290       self.run()
 291
 292     elif task == 'start_over':
 293       print 'Starting download over again'
 294       self.start_over()
 295
 296   def response_received(self, response):
 297     class FileDownloader(Protocol):
 298       def __init__(self, file, total, progress, done_cb):
 299         self.file = file
 300         self.total = total
 301         self.so_far = 0
 302         self.progress = progress
 303         self.all_done = done_cb
 304
 305       def dataReceived(self, bytes):
 306         self.file.write(bytes)
 307         self.so_far += len(bytes)
 308         percent = float(self.so_far) / float(self.total)
 309         self.progress.set_fraction(percent)
 310         amount = float(self.so_far)
 311         units = "bytes"
 312         for (size, unit) in [(1024 * 1024, "MiB"), (1024, "KiB")]:
 313           if amount > size:
 314             units = unit
 315             amount = amount / float(size)
 316             break
 317
 318         self.progress.set_text('Downloaded %2.1f%% (%2.1f %s)' % ((percent * 100.0), amount, units))
 319
 320       def connectionLost(self, reason):
 321         print 'Finished receiving body:', reason.getErrorMessage()
 322         self.all_done(reason)
 323
 324     dl = FileDownloader(self.file_download, response.length, self.progressbar, self.response_finished)
 325     response.deliverBody(dl)
 326
 327
 328   def response_finished(self, msg):
 329     if msg.check(ResponseDone):
 330       self.file_download.close()
 331       # next task!
 332       self.run_task()
 333
 334     else:
 335       print "FINISHED", msg
 336       ## FIXME handle errors
 337
 338
 339   def error(self, f):
 340       print "FAIL", f
 341
 342
 343   def download(self, name, url, path):
 344     # initialize the progress bar
 345     self.progressbar.set_fraction(0)
 346     self.progressbar.set_text('Downloading '+name)
 347     self.progressbar.show()
 348     self.refresh_gtk()
 349
 350     agent = Agent(reactor, VerifyTorProjectCert())
 351     d = agent.request('GET', url,
 352                       Headers({'User-Agent': ['torbrowser-launcher']}),
 353                       None)
 354
 355     self.file_download = open(path, 'w')
 356     d.addCallback(self.response_received).addErrback(self.error)
 357
 358   def download_chunk(self, name):
 359     # download 10kb a time
 360     chunk = self.dl_response.read(10240)
 361     self.dl_bytes_so_far += len(chunk)
 362     self.file_download.write(chunk)
 363
 364     if not chunk:
 365       self.file_download.close()
 366       # next task!
 367       self.run_task()
 368       return False
 369
 370     percent = float(self.dl_bytes_so_far) / self.dl_total_size
 371     self.progressbar.set_fraction(percent)
 372     percent = round(percent*100, 2)
 373     self.progressbar.set_text("Downloaded %d%% of %s" % (percent, name))
 374     self.refresh_gtk()
 375
 376     sys.stdout.write("Downloaded %d of %d bytes (%0.2f%%)\r" % (self.dl_bytes_so_far, self.dl_total_size, percent))
 377
 378     if self.dl_bytes_so_far >= self.dl_total_size:
 379       sys.stdout.write('\n')
 380
 381     return True
 382
 383   def verify(self):
 384     # initialize the progress bar
 385     self.progressbar.set_fraction(0)
 386     self.progressbar.set_text('Verifying Signature')
 387     self.progressbar.show()
 388
 389     p = subprocess.Popen([self.paths['file']['verify'], self.paths['dir']['gpg'], self.paths['file']['tarball_sig']], stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
 390     self.pulse_until_process_exits(p)
 391
 392     output = p.stdout.read()
 393
 394     if 'Good signature' in output:
 395       self.run_task()
 396     else:
 397       self.progressbar.hide()
 398       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.")
 399       self.gui_tasks = ['start_over']
 400       self.gui_task_i = 0
 401       self.start_button.show()
 402       self.start_button.set_sensitive(True)
 403
 404   def extract(self):
 405     # initialize the progress bar
 406     self.progressbar.set_fraction(0)
 407     self.progressbar.set_text('Installing')
 408     self.progressbar.show()
 409
 410     p = subprocess.Popen(['tar', '-xf', self.paths['file']['tarball'], '-C', self.paths['dir']['tbb']], stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
 411     self.pulse_until_process_exits(p)
 412
 413     self.run_task()
 414
 415   def run(self, run_next_task = True):
 416     subprocess.Popen([self.paths['file']['start']])
 417     if run_next_task:
 418       self.run_task()
 419
 420   # make the progress bar pulse until process p (a Popen object) finishes
 421   def pulse_until_process_exits(self, p):
 422     while p.poll() == None:
 423       time.sleep(0.01)
 424       self.progressbar.pulse()
 425       self.refresh_gtk()
 426
 427   # start over and download TBB again
 428   def start_over(self):
 429     self.label.set_text("Downloading Tor Browser Bundle over again.")
 430     self.gui_tasks = ['download_tarball', 'download_tarball_sig', 'verify', 'extract', 'run']
 431     self.gui_task_i = 0
 432     self.start(None)
 433
 434   # refresh gtk
 435   def refresh_gtk(self):
 436     while gtk.events_pending():
 437        gtk.main_iteration(False)
 438
 439   # exit
 440   def delete_event(self, widget, event, data=None):
 441     return False
 442   def destroy(self, widget, data=None):
 443     if self.timer:
 444       gobject.source_remove(self.timer)
 445     self.timer = False
 446
 447     self.file_download.close()
 448     reactor.stop()
 449
 450 if __name__ == "__main__":
 451   current_tbl_version = '0.1'
 452   current_tbb_version = '2.3.25-2'
 453
 454   print 'Tor Browser Launcher'
 455   print 'version %s' % (current_tbl_version)
 456   print 'https://github.com/micahflee/torbrowser-launcher'
 457
 458   app = TorBrowserLauncher(current_tbb_version)
 459