Raphaël G. Git Repositories - youtubedl/blob - youtube-dl

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