youtube_dlc/update.py

   1 from __future__ import unicode_literals
   2
   3 import io
   4 import json
   5 import traceback
   6 import hashlib
   7 import os
   8 import subprocess
   9 import sys
  10 from zipimport import zipimporter
  11
  12 from .compat import compat_realpath
  13 from .utils import encode_compat_str
  14
  15 from .version import __version__
  16
  17
  18 def rsa_verify(message, signature, key):
  19     from hashlib import sha256
  20     assert isinstance(message, bytes)
  21     byte_size = (len(bin(key[0])) - 2 + 8 - 1) // 8
  22     signature = ('%x' % pow(int(signature, 16), key[1], key[0])).encode()
  23     signature = (byte_size * 2 - len(signature)) * b'0' + signature
  24     asn1 = b'3031300d060960864801650304020105000420'
  25     asn1 += sha256(message).hexdigest().encode()
  26     if byte_size < len(asn1) // 2 + 11:
  27         return False
  28     expected = b'0001' + (byte_size - len(asn1) // 2 - 3) * b'ff' + b'00' + asn1
  29     return expected == signature
  30
  31
  32 def update_self(to_screen, verbose, opener):
  33     """Update the program file with the latest version from the repository"""
  34
  35     return to_screen('Update is currently broken.\nVisit  https://github.com/pukkandan/yt-dlc/releases/latest  to get the latest version')
  36
  37     UPDATE_URL = 'https://blackjack4494.github.io//update/'
  38     VERSION_URL = UPDATE_URL + 'LATEST_VERSION'
  39     JSON_URL = UPDATE_URL + 'versions.json'
  40     UPDATES_RSA_KEY = (0x9d60ee4d8f805312fdb15a62f87b95bd66177b91df176765d13514a0f1754bcd2057295c5b6f1d35daa6742c3ffc9a82d3e118861c207995a8031e151d863c9927e304576bc80692bc8e094896fcf11b66f3e29e04e3a71e9a11558558acea1840aec37fc396fb6b65dc81a1c4144e03bd1c011de62e3f1357b327d08426fe93, 65537)
  41
  42     def sha256sum():
  43         h = hashlib.sha256()
  44         b = bytearray(128 * 1024)
  45         mv = memoryview(b)
  46         with open(os.path.realpath(sys.executable), 'rb', buffering=0) as f:
  47             for n in iter(lambda: f.readinto(mv), 0):
  48                 h.update(mv[:n])
  49         return h.hexdigest()
  50
  51     to_screen('Current Build Hash %s' % sha256sum())
  52
  53     if not isinstance(globals().get('__loader__'), zipimporter) and not hasattr(sys, 'frozen'):
  54         to_screen('It looks like you installed youtube-dlc with a package manager, pip, setup.py or a tarball. Please use that to update.')
  55         return
  56
  57     # compiled file.exe can find itself by
  58     # to_screen(os.path.basename(sys.executable))
  59     # and path to py or exe
  60     # to_screen(os.path.realpath(sys.executable))
  61
  62     # Check if there is a new version
  63     try:
  64         newversion = opener.open(VERSION_URL).read().decode('utf-8').strip()
  65     except Exception:
  66         if verbose:
  67             to_screen(encode_compat_str(traceback.format_exc()))
  68         to_screen('ERROR: can\'t find the current version. Please try again later.')
  69         to_screen('Visit https://github.com/blackjack4494/yt-dlc/releases/latest')
  70         return
  71     if newversion == __version__:
  72         to_screen('youtube-dlc is up-to-date (' + __version__ + ')')
  73         return
  74
  75     # Download and check versions info
  76     try:
  77         versions_info = opener.open(JSON_URL).read().decode('utf-8')
  78         versions_info = json.loads(versions_info)
  79     except Exception:
  80         if verbose:
  81             to_screen(encode_compat_str(traceback.format_exc()))
  82         to_screen('ERROR: can\'t obtain versions info. Please try again later.')
  83         to_screen('Visit https://github.com/blackjack4494/yt-dlc/releases/latest')
  84         return
  85     if 'signature' not in versions_info:
  86         to_screen('ERROR: the versions file is not signed or corrupted. Aborting.')
  87         return
  88     signature = versions_info['signature']
  89     del versions_info['signature']
  90     if not rsa_verify(json.dumps(versions_info, sort_keys=True).encode('utf-8'), signature, UPDATES_RSA_KEY):
  91         to_screen('ERROR: the versions file signature is invalid. Aborting.')
  92         return
  93
  94     version_id = versions_info['latest']
  95
  96     def version_tuple(version_str):
  97         return tuple(map(int, version_str.split('.')))
  98     if version_tuple(__version__) >= version_tuple(version_id):
  99         to_screen('youtube-dlc is up to date (%s)' % __version__)
 100         return
 101
 102     to_screen('Updating to version ' + version_id + ' ...')
 103     version = versions_info['versions'][version_id]
 104
 105     print_notes(to_screen, versions_info['versions'])
 106
 107     # sys.executable is set to the full pathname of the exe-file for py2exe
 108     # though symlinks are not followed so that we need to do this manually
 109     # with help of realpath
 110     filename = compat_realpath(sys.executable if hasattr(sys, 'frozen') else sys.argv[0])
 111
 112     if not os.access(filename, os.W_OK):
 113         to_screen('ERROR: no write permissions on %s' % filename)
 114         return
 115
 116     # Py2EXE
 117     if hasattr(sys, 'frozen'):
 118         exe = filename
 119         directory = os.path.dirname(exe)
 120         if not os.access(directory, os.W_OK):
 121             to_screen('ERROR: no write permissions on %s' % directory)
 122             return
 123
 124         try:
 125             urlh = opener.open(version['exe'][0])
 126             newcontent = urlh.read()
 127             urlh.close()
 128         except (IOError, OSError):
 129             if verbose:
 130                 to_screen(encode_compat_str(traceback.format_exc()))
 131             to_screen('ERROR: unable to download latest version')
 132             to_screen('Visit https://github.com/blackjack4494/yt-dlc/releases/latest')
 133             return
 134
 135         newcontent_hash = hashlib.sha256(newcontent).hexdigest()
 136         if newcontent_hash != version['exe'][1]:
 137             to_screen('ERROR: the downloaded file hash does not match. Aborting.')
 138             return
 139
 140         try:
 141             with open(exe + '.new', 'wb') as outf:
 142                 outf.write(newcontent)
 143         except (IOError, OSError):
 144             if verbose:
 145                 to_screen(encode_compat_str(traceback.format_exc()))
 146             to_screen('ERROR: unable to write the new version')
 147             return
 148
 149         try:
 150             bat = os.path.join(directory, 'youtube-dlc-updater.bat')
 151             with io.open(bat, 'w') as batfile:
 152                 batfile.write('''
 153 @echo off
 154 echo Waiting for file handle to be closed ...
 155 ping 127.0.0.1 -n 5 -w 1000 > NUL
 156 move /Y "%s.new" "%s" > NUL
 157 echo Updated youtube-dlc to version %s.
 158 start /b "" cmd /c del "%%~f0"&exit /b"
 159                 \n''' % (exe, exe, version_id))
 160
 161             subprocess.Popen([bat])  # Continues to run in the background
 162             return  # Do not show premature success messages
 163         except (IOError, OSError):
 164             if verbose:
 165                 to_screen(encode_compat_str(traceback.format_exc()))
 166             to_screen('ERROR: unable to overwrite current version')
 167             return
 168
 169     # Zip unix package
 170     elif isinstance(globals().get('__loader__'), zipimporter):
 171         try:
 172             urlh = opener.open(version['bin'][0])
 173             newcontent = urlh.read()
 174             urlh.close()
 175         except (IOError, OSError):
 176             if verbose:
 177                 to_screen(encode_compat_str(traceback.format_exc()))
 178             to_screen('ERROR: unable to download latest version')
 179             to_screen('Visit https://github.com/blackjack4494/yt-dlc/releases/latest')
 180             return
 181
 182         newcontent_hash = hashlib.sha256(newcontent).hexdigest()
 183         if newcontent_hash != version['bin'][1]:
 184             to_screen('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(encode_compat_str(traceback.format_exc()))
 193             to_screen('ERROR: unable to overwrite current version')
 194             return
 195
 196     to_screen('Updated youtube-dlc. Restart youtube-dlc 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('PLEASE NOTE:')
 211         for note in notes:
 212             to_screen(note)