Raphaël G. Git Repositories - youtubedl/blob - devscripts/transition_helper_exe/youtube-dl.py

   1 #!/usr/bin/env python
   2
   3 import sys, os
   4 import urllib2
   5 import json, hashlib
   6
   7 def rsa_verify(message, signature, key):
   8     from struct import pack
   9     from hashlib import sha256
  10     from sys import version_info
  11     def b(x):
  12         if version_info[0] == 2: return x
  13         else: return x.encode('latin1')
  14     assert(type(message) == type(b('')))
  15     block_size = 0
  16     n = key[0]
  17     while n:
  18         block_size += 1
  19         n >>= 8
  20     signature = pow(int(signature, 16), key[1], key[0])
  21     raw_bytes = []
  22     while signature:
  23         raw_bytes.insert(0, pack("B", signature & 0xFF))
  24         signature >>= 8
  25     signature = (block_size - len(raw_bytes)) * b('\x00') + b('').join(raw_bytes)
  26     if signature[0:2] != b('\x00\x01'): return False
  27     signature = signature[2:]
  28     if not b('\x00') in signature: return False
  29     signature = signature[signature.index(b('\x00'))+1:]
  30     if not signature.startswith(b('\x30\x31\x30\x0D\x06\x09\x60\x86\x48\x01\x65\x03\x04\x02\x01\x05\x00\x04\x20')): return False
  31     signature = signature[19:]
  32     if signature != sha256(message).digest(): return False
  33     return True
  34
  35 sys.stderr.write(u'Hi! We changed distribution method and now youtube-dl needs to update itself one more time.\n')
  36 sys.stderr.write(u'This will only happen once. Simply press enter to go on. Sorry for the trouble!\n')
  37 sys.stderr.write(u'From now on, get the binaries from http://rg3.github.com/youtube-dl/download.html, not from the git repository.\n\n')
  38
  39 raw_input()
  40
  41 filename = sys.argv[0]
  42
  43 UPDATE_URL = "http://rg3.github.io/youtube-dl/update/"
  44 VERSION_URL = UPDATE_URL + 'LATEST_VERSION'
  45 JSON_URL = UPDATE_URL + 'versions.json'
  46 UPDATES_RSA_KEY = (0x9d60ee4d8f805312fdb15a62f87b95bd66177b91df176765d13514a0f1754bcd2057295c5b6f1d35daa6742c3ffc9a82d3e118861c207995a8031e151d863c9927e304576bc80692bc8e094896fcf11b66f3e29e04e3a71e9a11558558acea1840aec37fc396fb6b65dc81a1c4144e03bd1c011de62e3f1357b327d08426fe93, 65537)
  47
  48 if not os.access(filename, os.W_OK):
  49     sys.exit('ERROR: no write permissions on %s' % filename)
  50
  51 exe = os.path.abspath(filename)
  52 directory = os.path.dirname(exe)
  53 if not os.access(directory, os.W_OK):
  54     sys.exit('ERROR: no write permissions on %s' % directory)
  55
  56 try:
  57     versions_info = urllib2.urlopen(JSON_URL).read().decode('utf-8')
  58     versions_info = json.loads(versions_info)
  59 except:
  60     sys.exit(u'ERROR: can\'t obtain versions info. Please try again later.')
  61 if not 'signature' in versions_info:
  62     sys.exit(u'ERROR: the versions file is not signed or corrupted. Aborting.')
  63 signature = versions_info['signature']
  64 del versions_info['signature']
  65 if not rsa_verify(json.dumps(versions_info, sort_keys=True), signature, UPDATES_RSA_KEY):
  66     sys.exit(u'ERROR: the versions file signature is invalid. Aborting.')
  67
  68 version = versions_info['versions'][versions_info['latest']]
  69
  70 try:
  71     urlh = urllib2.urlopen(version['exe'][0])
  72     newcontent = urlh.read()
  73     urlh.close()
  74 except (IOError, OSError) as err:
  75     sys.exit('ERROR: unable to download latest version')
  76
  77 newcontent_hash = hashlib.sha256(newcontent).hexdigest()
  78 if newcontent_hash != version['exe'][1]:
  79     sys.exit(u'ERROR: the downloaded file hash does not match. Aborting.')
  80
  81 try:
  82     with open(exe + '.new', 'wb') as outf:
  83         outf.write(newcontent)
  84 except (IOError, OSError) as err:
  85     sys.exit(u'ERROR: unable to write the new version')
  86
  87 try:
  88     bat = os.path.join(directory, 'youtube-dl-updater.bat')
  89     b = open(bat, 'w')
  90     b.write("""
  91 echo Updating youtube-dl...
  92 ping 127.0.0.1 -n 5 -w 1000 > NUL
  93 move /Y "%s.new" "%s"
  94 del "%s"
  95     \n""" %(exe, exe, bat))
  96     b.close()
  97
  98     os.startfile(bat)
  99 except (IOError, OSError) as err:
 100     sys.exit('ERROR: unable to overwrite current version')
 101
 102 sys.stderr.write(u'Done! Now you can run youtube-dl.\n')