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       #gtk.main()
  96       reactor.run()
  97
  98   # discover the architecture and language
  99   def discover_arch_lang(self):
 100     # figure out the architecture
 101     (sysname, nodename, release, version, machine) = os.uname()
 102     self.architecture = machine
 103
 104     # figure out the language
 105     available_languages = ['en-US', 'ar', 'de', 'es-ES', 'fa', 'fr', 'it', 'ko', 'nl', 'pl', 'pt-PT', 'ru', 'vi', 'zh-CN']
 106     default_locale = locale.getdefaultlocale()[0]
 107     if default_locale == None:
 108       self.language = 'en-US'
 109     else:
 110       self.language = default_locale.replace('_', '-')
 111       if self.language not in available_languages:
 112         self.language = self.language.split('-')[0]
 113         if self.language not in available_languages:
 114           for l in available_languages:
 115             if l[0:2] == self.language:
 116               self.language = l
 117       # if language isn't available, default to english
 118       if self.language not in available_languages:
 119         self.language = 'en-US'
 120
 121   # build all relevant paths
 122   def build_paths(self):
 123     tbb_data = os.getenv('HOME')+'/.torbrowser'
 124     tarball_filename = 'tor-browser-gnu-linux-'+self.architecture+'-'+self.current_tbb_version+'-dev-'+self.language+'.tar.gz'
 125
 126     self.paths = {
 127       'dir': {
 128         'data': tbb_data,
 129         'download': tbb_data+'/download',
 130         'tbb': tbb_data+'/tbb/'+self.architecture,
 131         'gpg': tbb_data+'/gpgtmp'
 132       },
 133       'file': {
 134         'version': tbb_data+'/version',
 135         'start': tbb_data+'/tbb/'+self.architecture+'/tor-browser_'+self.language+'/start-tor-browser',
 136         'tarball': tbb_data+'/download/'+tarball_filename,
 137         'tarball_sig': tbb_data+'/download/'+tarball_filename+'.asc',
 138         'verify': '/usr/share/torbrowser-launcher/verify.sh'
 139       },
 140       'url': {
 141         'tarball': 'https://www.torproject.org/dist/torbrowser/linux/'+tarball_filename,
 142         'tarball_sig': 'https://www.torproject.org/dist/torbrowser/linux/'+tarball_filename+'.asc'
 143       },
 144       'filename': {
 145         'tarball': tarball_filename,
 146         'tarball_sig': tarball_filename+'.asc'
 147       }
 148     }
 149
 150   # create directories that don't exist
 151   def mkdirs(self):
 152     if os.path.exists(self.paths['dir']['download']) == False:
 153       os.makedirs(self.paths['dir']['download'])
 154     if os.path.exists(self.paths['dir']['tbb']) == False:
 155       os.makedirs(self.paths['dir']['tbb'])
 156
 157   # there are different GUIs that might appear, this sets which one we want
 158   def set_gui(self, gui, message, tasks, autostart=True):
 159     self.gui = gui
 160     self.gui_message = message
 161     self.gui_tasks = tasks
 162     self.gui_autostart = autostart
 163
 164   # build the application's UI
 165   def build_ui(self):
 166     self.timer = False
 167
 168     # allow buttons to have icons
 169     try:
 170       settings = gtk.settings_get_default()
 171       settings.props.gtk_button_images = True
 172     except:
 173       pass
 174
 175     # set up the window
 176     self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
 177     self.window.set_title("Tor Browser")
 178     self.window.set_position(gtk.WIN_POS_CENTER)
 179     self.window.set_border_width(10)
 180     self.window.connect("delete_event", self.delete_event)
 181     self.window.connect("destroy", self.destroy)
 182
 183     self.box = gtk.VBox(False, 20)
 184     self.window.add(self.box)
 185
 186     if self.gui == 'error':
 187       # labels
 188       self.label1 = gtk.Label( self.gui_message )
 189       self.label1.set_line_wrap(True)
 190       self.box.pack_start(self.label1, True, True, 0)
 191       self.label1.show()
 192
 193       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.")
 194       self.label2.set_line_wrap(True)
 195       self.box.pack_start(self.label2, True, True, 0)
 196       self.label2.show()
 197
 198       # exit button
 199       exit_image = gtk.Image()
 200       exit_image.set_from_stock(gtk.STOCK_CANCEL, gtk.ICON_SIZE_BUTTON)
 201       self.exit_button = gtk.Button("Exit")
 202       self.exit_button.set_image(exit_image)
 203       self.exit_button.connect("clicked", self.destroy, None)
 204       self.box.add(self.exit_button)
 205       self.exit_button.show()
 206
 207     elif self.gui == 'task':
 208       # label
 209       self.label = gtk.Label( self.gui_message )
 210       self.label.set_line_wrap(True)
 211       self.box.pack_start(self.label, True, True, 0)
 212       self.label.show()
 213
 214       # progress bar
 215       self.progressbar = gtk.ProgressBar(adjustment=None)
 216       self.progressbar.set_orientation(gtk.PROGRESS_LEFT_TO_RIGHT)
 217       self.progressbar.set_pulse_step(0.01)
 218       self.box.pack_start(self.progressbar, True, True, 0)
 219
 220       # button box
 221       self.button_box = gtk.HButtonBox()
 222       self.button_box.set_layout(gtk.BUTTONBOX_SPREAD)
 223       self.box.pack_start(self.button_box, True, True, 0)
 224       self.button_box.show()
 225
 226       # start button
 227       start_image = gtk.Image()
 228       start_image.set_from_stock(gtk.STOCK_APPLY, gtk.ICON_SIZE_BUTTON)
 229       self.start_button = gtk.Button("Start")
 230       self.start_button.set_image(start_image)
 231       self.start_button.connect("clicked", self.start, None)
 232       self.button_box.add(self.start_button)
 233       if not self.gui_autostart:
 234         self.start_button.show()
 235
 236       # exit button
 237       exit_image = gtk.Image()
 238       exit_image.set_from_stock(gtk.STOCK_CANCEL, gtk.ICON_SIZE_BUTTON)
 239       self.exit_button = gtk.Button("Exit")
 240       self.exit_button.set_image(exit_image)
 241       self.exit_button.connect("clicked", self.destroy, None)
 242       self.button_box.add(self.exit_button)
 243       self.exit_button.show()
 244
 245     self.box.show()
 246     self.window.show()
 247
 248     if self.gui_autostart:
 249       self.start(None)
 250
 251   # start button clicked, begin tasks
 252   def start(self, widget, data=None):
 253     # disable the start button
 254     self.start_button.set_sensitive(False)
 255
 256     # start running tasks
 257     self.gui_task_i = 0
 258     self.run_task()
 259
 260   # run the next task in the task list
 261   def run_task(self):
 262     self.refresh_gtk()
 263
 264     if self.gui_task_i >= len(self.gui_tasks):
 265       self.destroy(False)
 266       return
 267
 268     task = self.gui_tasks[self.gui_task_i]
 269
 270     # get ready for the next task
 271     self.gui_task_i += 1
 272
 273     if task == 'download_tarball':
 274       print 'Downloading '+self.paths['url']['tarball']
 275       self.download('tarball', self.paths['url']['tarball'], self.paths['file']['tarball'])
 276
 277     elif task == 'download_tarball_sig':
 278       print 'Downloading '+self.paths['url']['tarball_sig']
 279       self.download('signature', self.paths['url']['tarball_sig'], self.paths['file']['tarball_sig'])
 280
 281     elif task == 'verify':
 282       print 'Verifying signature'
 283       self.verify()
 284
 285     elif task == 'extract':
 286       print 'Extracting '+self.paths['filename']['tarball']
 287       self.extract()
 288
 289     elif task == 'run':
 290       print 'Running '+self.paths['file']['start']
 291       self.run()
 292
 293     elif task == 'start_over':
 294       print 'Starting download over again'
 295       self.start_over()
 296
 297   def response_received(self, response):
 298     class FileDownloader(Protocol):
 299       def __init__(self, file, total, progress, done_cb):
 300         self.file = file
 301         self.total = total
 302         self.so_far = 0
 303         self.progress = progress
 304         self.all_done = done_cb
 305
 306       def dataReceived(self, bytes):
 307         self.file.write(bytes)
 308         self.so_far += len(bytes)
 309         percent = float(self.so_far) / float(self.total)
 310         self.progress.set_fraction(percent)
 311         amount = float(self.so_far)
 312         units = "bytes"
 313         for (size, unit) in [(1024 * 1024, "MiB"), (1024, "KiB")]:
 314           if amount > size:
 315             units = unit
 316             amount = amount / float(size)
 317             break
 318
 319         self.progress.set_text('Downloaded %2.1f%% (%2.1f %s)' % ((percent * 100.0), amount, units))
 320
 321       def connectionLost(self, reason):
 322         print 'Finished receiving body:', reason.getErrorMessage()
 323         self.all_done(reason)
 324
 325     dl = FileDownloader(self.file_download, response.length, self.progressbar, self.response_finished)
 326     response.deliverBody(dl)
 327
 328
 329   def response_finished(self, msg):
 330     print dir(msg)
 331     if msg.check(ResponseDone):
 332       self.file_download.close()
 333       # next task!
 334       self.run_task()
 335
 336     else:
 337       print "FINISHED", msg
 338       ## FIXME handle errors
 339
 340
 341   def error(self, f):
 342       print "FAIL", f
 343
 344
 345   def download(self, name, url, path):
 346     # initialize the progress bar
 347     self.progressbar.set_fraction(0)
 348     self.progressbar.set_text('Downloading '+name)
 349     self.progressbar.show()
 350     self.refresh_gtk()
 351
 352     agent = Agent(reactor, VerifyTorProjectCert())
 353     d = agent.request('GET', url,
 354                       Headers({'User-Agent': ['torbrowser-launcher']}),
 355                       None)
 356
 357     self.file_download = open(path, 'w')
 358     d.addCallback(self.response_received).addErrback(self.error)
 359
 360   def download_chunk(self, name):
 361     # download 10kb a time
 362     chunk = self.dl_response.read(10240)
 363     self.dl_bytes_so_far += len(chunk)
 364     self.file_download.write(chunk)
 365
 366     if not chunk:
 367       self.file_download.close()
 368       # next task!
 369       self.run_task()
 370       return False
 371
 372     percent = float(self.dl_bytes_so_far) / self.dl_total_size
 373     self.progressbar.set_fraction(percent)
 374     percent = round(percent*100, 2)
 375     self.progressbar.set_text("Downloaded %d%% of %s" % (percent, name))
 376     self.refresh_gtk()
 377
 378     sys.stdout.write("Downloaded %d of %d bytes (%0.2f%%)\r" % (self.dl_bytes_so_far, self.dl_total_size, percent))
 379
 380     if self.dl_bytes_so_far >= self.dl_total_size:
 381       sys.stdout.write('\n')
 382
 383     return True
 384
 385   def verify(self):
 386     # initialize the progress bar
 387     self.progressbar.set_fraction(0)
 388     self.progressbar.set_text('Verifying Signature')
 389     self.progressbar.show()
 390
 391     p = subprocess.Popen([self.paths['file']['verify'], self.paths['dir']['gpg'], self.paths['file']['tarball_sig']], stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
 392     self.pulse_until_process_exits(p)
 393
 394     output = p.stdout.read()
 395
 396     if 'Good signature' in output:
 397       self.run_task()
 398     else:
 399       self.progressbar.hide()
 400       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.")
 401       self.gui_tasks = ['start_over']
 402       self.gui_task_i = 0
 403       self.start_button.show()
 404       self.start_button.set_sensitive(True)
 405
 406   def extract(self):
 407     # initialize the progress bar
 408     self.progressbar.set_fraction(0)
 409     self.progressbar.set_text('Installing')
 410     self.progressbar.show()
 411
 412     p = subprocess.Popen(['tar', '-xf', self.paths['file']['tarball'], '-C', self.paths['dir']['tbb']], stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
 413     self.pulse_until_process_exits(p)
 414
 415     self.run_task()
 416
 417   def run(self, run_next_task = True):
 418     subprocess.Popen([self.paths['file']['start']])
 419     if run_next_task:
 420       self.run_task()
 421
 422   # make the progress bar pulse until process p (a Popen object) finishes
 423   def pulse_until_process_exits(self, p):
 424     while p.poll() == None:
 425       time.sleep(0.01)
 426       self.progressbar.pulse()
 427       self.refresh_gtk()
 428
 429   # start over and download TBB again
 430   def start_over(self):
 431     self.label.set_text("Downloading Tor Browser Bundle over again.")
 432     self.gui_tasks = ['download_tarball', 'download_tarball_sig', 'verify', 'extract', 'run']
 433     self.gui_task_i = 0
 434     self.start(None)
 435
 436   # refresh gtk
 437   def refresh_gtk(self):
 438     while gtk.events_pending():
 439        gtk.main_iteration(False)
 440
 441   # exit
 442   def delete_event(self, widget, event, data=None):
 443     return False
 444   def destroy(self, widget, data=None):
 445     if self.timer:
 446       gobject.source_remove(self.timer)
 447     self.timer = False
 448
 449     self.file_download.close()
 450     reactor.stop()
 451
 452 if __name__ == "__main__":
 453   current_tbl_version = '0.1'
 454   current_tbb_version = '2.3.25-2'
 455
 456   print 'Tor Browser Launcher'
 457   print 'version %s' % (current_tbl_version)
 458   print 'https://github.com/micahflee/torbrowser-launcher'
 459
 460   app = TorBrowserLauncher(current_tbb_version)
 461