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     UPDATE_URL = 'https://blackjack4494.github.io//update/'
  36     VERSION_URL = UPDATE_URL + 'LATEST_VERSION'
  37     JSON_URL = UPDATE_URL + 'versions.json'
  38     UPDATES_RSA_KEY = (0x9d60ee4d8f805312fdb15a62f87b95bd66177b91df176765d13514a0f1754bcd2057295c5b6f1d35daa6742c3ffc9a82d3e118861c207995a8031e151d863c9927e304576bc80692bc8e094896fcf11b66f3e29e04e3a71e9a11558558acea1840aec37fc396fb6b65dc81a1c4144e03bd1c011de62e3f1357b327d08426fe93, 65537)
  39
  40     def sha256sum():
  41         h = hashlib.sha256()
  42         b = bytearray(128 * 1024)
  43         mv = memoryview(b)
  44         with open(os.path.realpath(sys.executable), 'rb', buffering=0) as f:
  45             for n in iter(lambda: f.readinto(mv), 0):
  46                 h.update(mv[:n])
  47         return h.hexdigest()
  48
  49     to_screen('Current Build Hash %s' % sha256sum())
  50
  51     if not isinstance(globals().get('__loader__'), zipimporter) and not hasattr(sys, 'frozen'):
  52         to_screen('It looks like you installed youtube-dlc with a package manager, pip, setup.py or a tarball. Please use that to update.')
  53         return
  54
  55     # compiled file.exe can find itself by
  56     # to_screen(os.path.basename(sys.executable))
  57     # and path to py or exe
  58     # to_screen(os.path.realpath(sys.executable))
  59
  60     # Check if there is a new version
  61     try:
  62         newversion = opener.open(VERSION_URL).read().decode('utf-8').strip()
  63     except Exception:
  64         if verbose:
  65             to_screen(encode_compat_str(traceback.format_exc()))
  66         to_screen('ERROR: can\'t find the current version. Please try again later.')
  67         to_screen('Visit https://github.com/blackjack4494/yt-dlc/releases/latest')
  68         return
  69     if newversion == __version__:
  70         to_screen('youtube-dlc is up-to-date (' + __version__ + ')')
  71         return
  72
  73     # Download and check versions info
  74     try:
  75         versions_info = opener.open(JSON_URL).read().decode('utf-8')
  76         versions_info = json.loads(versions_info)
  77     except Exception:
  78         if verbose:
  79             to_screen(encode_compat_str(traceback.format_exc()))
  80         to_screen('ERROR: can\'t obtain versions info. Please try again later.')
  81         to_screen('Visit https://github.com/blackjack4494/yt-dlc/releases/latest')
  82         return
  83     if 'signature' not in versions_info:
  84         to_screen('ERROR: the versions file is not signed or corrupted. Aborting.')
  85         return
  86     signature = versions_info['signature']
  87     del versions_info['signature']
  88     if not rsa_verify(json.dumps(versions_info, sort_keys=True).encode('utf-8'), signature, UPDATES_RSA_KEY):
  89         to_screen('ERROR: the versions file signature is invalid. Aborting.')
  90         return
  91
  92     version_id = versions_info['latest']
  93
  94     def version_tuple(version_str):
  95         return tuple(map(int, version_str.split('.')))
  96     if version_tuple(__version__) >= version_tuple(version_id):
  97         to_screen('youtube-dlc is up to date (%s)' % __version__)
  98         return
  99
 100     to_screen('Updating to version ' + version_id + ' ...')
 101     version = versions_info['versions'][version_id]
 102
 103     print_notes(to_screen, versions_info['versions'])
 104
 105     # sys.executable is set to the full pathname of the exe-file for py2exe
 106     # though symlinks are not followed so that we need to do this manually
 107     # with help of realpath
 108     filename = compat_realpath(sys.executable if hasattr(sys, 'frozen') else sys.argv[0])
 109
 110     if not os.access(filename, os.W_OK):
 111         to_screen('ERROR: no write permissions on %s' % filename)
 112         return
 113
 114     # Py2EXE
 115     if hasattr(sys, 'frozen'):
 116         exe = filename
 117         directory = os.path.dirname(exe)
 118         if not os.access(directory, os.W_OK):
 119             to_screen('ERROR: no write permissions on %s' % directory)
 120             return
 121
 122         try:
 123             urlh = opener.open(version['exe'][0])
 124             newcontent = urlh.read()
 125             urlh.close()
 126         except (IOError, OSError):
 127             if verbose:
 128                 to_screen(encode_compat_str(traceback.format_exc()))
 129             to_screen('ERROR: unable to download latest version')
 130             to_screen('Visit https://github.com/blackjack4494/yt-dlc/releases/latest')
 131             return
 132
 133         newcontent_hash = hashlib.sha256(newcontent).hexdigest()
 134         if newcontent_hash != version['exe'][1]:
 135             to_screen('ERROR: the downloaded file hash does not match. Aborting.')
 136             return
 137
 138         try:
 139             with open(exe + '.new', 'wb') as outf:
 140                 outf.write(newcontent)
 141         except (IOError, OSError):
 142             if verbose:
 143                 to_screen(encode_compat_str(traceback.format_exc()))
 144             to_screen('ERROR: unable to write the new version')
 145             return
 146
 147         try:
 148             bat = os.path.join(directory, 'youtube-dlc-updater.bat')
 149             with io.open(bat, 'w') as batfile:
 150                 batfile.write('''
 151 @echo off
 152 echo Waiting for file handle to be closed ...
 153 ping 127.0.0.1 -n 5 -w 1000 > NUL
 154 move /Y "%s.new" "%s" > NUL
 155 echo Updated youtube-dlc to version %s.
 156 start /b "" cmd /c del "%%~f0"&exit /b"
 157                 \n''' % (exe, exe, version_id))
 158
 159             subprocess.Popen([bat])  # Continues to run in the background
 160             return  # Do not show premature success messages
 161         except (IOError, OSError):
 162             if verbose:
 163                 to_screen(encode_compat_str(traceback.format_exc()))
 164             to_screen('ERROR: unable to overwrite current version')
 165             return
 166
 167     # Zip unix package
 168     elif isinstance(globals().get('__loader__'), zipimporter):
 169         try:
 170             urlh = opener.open(version['bin'][0])
 171             newcontent = urlh.read()
 172             urlh.close()
 173         except (IOError, OSError):
 174             if verbose:
 175                 to_screen(encode_compat_str(traceback.format_exc()))
 176             to_screen('ERROR: unable to download latest version')
 177             to_screen('Visit https://github.com/blackjack4494/yt-dlc/releases/latest')
 178             return
 179
 180         newcontent_hash = hashlib.sha256(newcontent).hexdigest()
 181         if newcontent_hash != version['bin'][1]:
 182             to_screen('ERROR: the downloaded file hash does not match. Aborting.')
 183             return
 184
 185         try:
 186             with open(filename, 'wb') as outf:
 187                 outf.write(newcontent)
 188         except (IOError, OSError):
 189             if verbose:
 190                 to_screen(encode_compat_str(traceback.format_exc()))
 191             to_screen('ERROR: unable to overwrite current version')
 192             return
 193
 194     to_screen('Updated youtube-dlc. Restart youtube-dlc to use the new version.')
 195
 196
 197 def get_notes(versions, fromVersion):
 198     notes = []
 199     for v, vdata in sorted(versions.items()):
 200         if v > fromVersion:
 201             notes.extend(vdata.get('notes', []))
 202     return notes
 203
 204
 205 def print_notes(to_screen, versions, fromVersion=__version__):
 206     notes = get_notes(versions, fromVersion)
 207     if notes:
 208         to_screen('PLEASE NOTE:')
 209         for note in notes:
 210             to_screen(note)