youtube_dl/update.py

   1 import io
   2 import json
   3 import traceback
   4 import hashlib
   5 import os
   6 import subprocess
   7 import sys
   8 from zipimport import zipimporter
   9
  10 from .utils import (
  11     compat_str,
  12     compat_urllib_request,
  13 )
  14 from .version import __version__
  15
  16
  17 def rsa_verify(message, signature, key):
  18     from struct import pack
  19     from hashlib import sha256
  20     from sys import version_info
  21
  22     def b(x):
  23         if version_info[0] == 2:
  24             return x
  25         else:
  26             return x.encode('latin1')
  27     assert(type(message) == type(b('')))
  28     block_size = 0
  29     n = key[0]
  30     while n:
  31         block_size += 1
  32         n >>= 8
  33     signature = pow(int(signature, 16), key[1], key[0])
  34     raw_bytes = []
  35     while signature:
  36         raw_bytes.insert(0, pack("B", signature & 0xFF))
  37         signature >>= 8
  38     signature = (block_size - len(raw_bytes)) * b('\x00') + b('').join(raw_bytes)
  39     if signature[0:2] != b('\x00\x01'):
  40         return False
  41     signature = signature[2:]
  42     if not b('\x00') in signature:
  43         return False
  44     signature = signature[signature.index(b('\x00')) + 1:]
  45     if not signature.startswith(b('\x30\x31\x30\x0D\x06\x09\x60\x86\x48\x01\x65\x03\x04\x02\x01\x05\x00\x04\x20')):
  46         return False
  47     signature = signature[19:]
  48     if signature != sha256(message).digest():
  49         return False
  50     return True
  51
  52
  53 def update_self(to_screen, verbose):
  54     """Update the program file with the latest version from the repository"""
  55
  56     UPDATE_URL = "http://rg3.github.io/youtube-dl/update/"
  57     VERSION_URL = UPDATE_URL + 'LATEST_VERSION'
  58     JSON_URL = UPDATE_URL + 'versions.json'
  59     UPDATES_RSA_KEY = (0x9d60ee4d8f805312fdb15a62f87b95bd66177b91df176765d13514a0f1754bcd2057295c5b6f1d35daa6742c3ffc9a82d3e118861c207995a8031e151d863c9927e304576bc80692bc8e094896fcf11b66f3e29e04e3a71e9a11558558acea1840aec37fc396fb6b65dc81a1c4144e03bd1c011de62e3f1357b327d08426fe93, 65537)
  60
  61     if not isinstance(globals().get('__loader__'), zipimporter) and not hasattr(sys, "frozen"):
  62         to_screen(u'It looks like you installed youtube-dl with a package manager, pip, setup.py or a tarball. Please use that to update.')
  63         return
  64
  65     # Check if there is a new version
  66     try:
  67         newversion = compat_urllib_request.urlopen(VERSION_URL).read().decode('utf-8').strip()
  68     except:
  69         if verbose:
  70             to_screen(compat_str(traceback.format_exc()))
  71         to_screen(u'ERROR: can\'t find the current version. Please try again later.')
  72         return
  73     if newversion == __version__:
  74         to_screen(u'youtube-dl is up-to-date (' + __version__ + ')')
  75         return
  76
  77     # Download and check versions info
  78     try:
  79         versions_info = compat_urllib_request.urlopen(JSON_URL).read().decode('utf-8')
  80         versions_info = json.loads(versions_info)
  81     except:
  82         if verbose:
  83             to_screen(compat_str(traceback.format_exc()))
  84         to_screen(u'ERROR: can\'t obtain versions info. Please try again later.')
  85         return
  86     if not 'signature' in versions_info:
  87         to_screen(u'ERROR: the versions file is not signed or corrupted. Aborting.')
  88         return
  89     signature = versions_info['signature']
  90     del versions_info['signature']
  91     if not rsa_verify(json.dumps(versions_info, sort_keys=True).encode('utf-8'), signature, UPDATES_RSA_KEY):
  92         to_screen(u'ERROR: the versions file signature is invalid. Aborting.')
  93         return
  94
  95     version_id = versions_info['latest']
  96
  97     def version_tuple(version_str):
  98         return tuple(map(int, version_str.split('.')))
  99     if version_tuple(__version__) >= version_tuple(version_id):
 100         to_screen(u'youtube-dl is up to date (%s)' % __version__)
 101         return
 102
 103     to_screen(u'Updating to version ' + version_id + ' ...')
 104     version = versions_info['versions'][version_id]
 105
 106     print_notes(to_screen, versions_info['versions'])
 107
 108     filename = sys.argv[0]
 109     # Py2EXE: Filename could be different
 110     if hasattr(sys, "frozen") and not os.path.isfile(filename):
 111         if os.path.isfile(filename + u'.exe'):
 112             filename += u'.exe'
 113
 114     if not os.access(filename, os.W_OK):
 115         to_screen(u'ERROR: no write permissions on %s' % filename)
 116         return
 117
 118     # Py2EXE
 119     if hasattr(sys, "frozen"):
 120         exe = os.path.abspath(filename)
 121         directory = os.path.dirname(exe)
 122         if not os.access(directory, os.W_OK):
 123             to_screen(u'ERROR: no write permissions on %s' % directory)
 124             return
 125
 126         try:
 127             urlh = compat_urllib_request.urlopen(version['exe'][0])
 128             newcontent = urlh.read()
 129             urlh.close()
 130         except (IOError, OSError):
 131             if verbose:
 132                 to_screen(compat_str(traceback.format_exc()))
 133             to_screen(u'ERROR: unable to download latest version')
 134             return
 135
 136         newcontent_hash = hashlib.sha256(newcontent).hexdigest()
 137         if newcontent_hash != version['exe'][1]:
 138             to_screen(u'ERROR: the downloaded file hash does not match. Aborting.')
 139             return
 140
 141         try:
 142             with open(exe + '.new', 'wb') as outf:
 143                 outf.write(newcontent)
 144         except (IOError, OSError):
 145             if verbose:
 146                 to_screen(compat_str(traceback.format_exc()))
 147             to_screen(u'ERROR: unable to write the new version')
 148             return
 149
 150         try:
 151             bat = os.path.join(directory, 'youtube-dl-updater.bat')
 152             with io.open(bat, 'w') as batfile:
 153                 batfile.write(u"""
 154 @echo off
 155 echo Waiting for file handle to be closed ...
 156 ping 127.0.0.1 -n 5 -w 1000 > NUL
 157 move /Y "%s.new" "%s" > NUL
 158 echo Updated youtube-dl to version %s.
 159 start /b "" cmd /c del "%%~f0"&exit /b"
 160                 \n""" % (exe, exe, version_id))
 161
 162             subprocess.Popen([bat])  # Continues to run in the background
 163             return  # Do not show premature success messages
 164         except (IOError, OSError):
 165             if verbose:
 166                 to_screen(compat_str(traceback.format_exc()))
 167             to_screen(u'ERROR: unable to overwrite current version')
 168             return
 169
 170     # Zip unix package
 171     elif isinstance(globals().get('__loader__'), zipimporter):
 172         try:
 173             urlh = compat_urllib_request.urlopen(version['bin'][0])
 174             newcontent = urlh.read()
 175             urlh.close()
 176         except (IOError, OSError):
 177             if verbose:
 178                 to_screen(compat_str(traceback.format_exc()))
 179             to_screen(u'ERROR: unable to download latest version')
 180             return
 181
 182         newcontent_hash = hashlib.sha256(newcontent).hexdigest()
 183         if newcontent_hash != version['bin'][1]:
 184             to_screen(u'ERROR: the downloaded file hash does not match. Aborting.')
 185             return
 186
 187         try:
 188             with open(filename, 'wb') as outf:
 189                 outf.write(newcontent)
 190         except (IOError, OSError):
 191             if verbose:
 192                 to_screen(compat_str(traceback.format_exc()))
 193             to_screen(u'ERROR: unable to overwrite current version')
 194             return
 195
 196     to_screen(u'Updated youtube-dl. Restart youtube-dl to use the new version.')
 197
 198
 199 def get_notes(versions, fromVersion):
 200     notes = []
 201     for v, vdata in sorted(versions.items()):
 202         if v > fromVersion:
 203             notes.extend(vdata.get('notes', []))
 204     return notes
 205
 206
 207 def print_notes(to_screen, versions, fromVersion=__version__):
 208     notes = get_notes(versions, fromVersion)
 209     if notes:
 210         to_screen(u'PLEASE NOTE:')
 211         for note in notes:
 212             to_screen(note)