diff options
Diffstat (limited to 'youtube-dl')
| -rwxr-xr-x | youtube-dl | 57 |
1 files changed, 53 insertions, 4 deletions
@@ -1,15 +1,44 @@ #!/usr/bin/env python import sys, os +import json, hashlib try: import urllib.request as compat_urllib_request except ImportError: # Python 2 import urllib2 as compat_urllib_request +def rsa_verify(message, signature, key): + from struct import pack + from hashlib import sha256 + from sys import version_info + def b(x): + if version_info[0] == 2: return x + else: return x.encode('latin1') + assert(type(message) == type(b(''))) + block_size = 0 + n = key[0] + while n: + block_size += 1 + n >>= 8 + signature = pow(int(signature, 16), key[1], key[0]) + raw_bytes = [] + while signature: + raw_bytes.insert(0, pack("B", signature & 0xFF)) + signature >>= 8 + signature = (block_size - len(raw_bytes)) * b('\x00') + b('').join(raw_bytes) + if signature[0:2] != b('\x00\x01'): return False + signature = signature[2:] + if not b('\x00') in signature: return False + signature = signature[signature.index(b('\x00'))+1:] + 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 + signature = signature[19:] + if signature != sha256(message).digest(): return False + return True + sys.stderr.write(u'Hi! We changed distribution method and now youtube-dl needs to update itself one more time.\n') sys.stderr.write(u'This will only happen once. Simply press enter to go on. Sorry for the trouble!\n') -sys.stderr.write(u'The new location of the binaries is https://github.com/rg3/youtube-dl/downloads, not the git repository.\n\n') +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') try: raw_input() @@ -18,19 +47,39 @@ except NameError: # Python 3 filename = sys.argv[0] -API_URL = "https://api.github.com/repos/rg3/youtube-dl/downloads" -BIN_URL = "https://github.com/downloads/rg3/youtube-dl/youtube-dl" +UPDATE_URL = "http://rg3.github.com/youtube-dl/update/" +VERSION_URL = UPDATE_URL + 'LATEST_VERSION' +JSON_URL = UPDATE_URL + 'versions.json' +UPDATES_RSA_KEY = (0x9d60ee4d8f805312fdb15a62f87b95bd66177b91df176765d13514a0f1754bcd2057295c5b6f1d35daa6742c3ffc9a82d3e118861c207995a8031e151d863c9927e304576bc80692bc8e094896fcf11b66f3e29e04e3a71e9a11558558acea1840aec37fc396fb6b65dc81a1c4144e03bd1c011de62e3f1357b327d08426fe93, 65537) if not os.access(filename, os.W_OK): sys.exit('ERROR: no write permissions on %s' % filename) try: - urlh = compat_urllib_request.urlopen(BIN_URL) + versions_info = compat_urllib_request.urlopen(JSON_URL).read().decode('utf-8') + versions_info = json.loads(versions_info) +except: + sys.exit(u'ERROR: can\'t obtain versions info. Please try again later.') +if not 'signature' in versions_info: + sys.exit(u'ERROR: the versions file is not signed or corrupted. Aborting.') +signature = versions_info['signature'] +del versions_info['signature'] +if not rsa_verify(json.dumps(versions_info, sort_keys=True), signature, UPDATES_RSA_KEY): + sys.exit(u'ERROR: the versions file signature is invalid. Aborting.') + +version = versions_info['versions'][versions_info['latest']] + +try: + urlh = compat_urllib_request.urlopen(version['bin'][0]) newcontent = urlh.read() urlh.close() except (IOError, OSError) as err: sys.exit('ERROR: unable to download latest version') +newcontent_hash = hashlib.sha256(newcontent).hexdigest() +if newcontent_hash != version['bin'][1]: + sys.exit(u'ERROR: the downloaded file hash does not match. Aborting.') + try: with open(filename, 'wb') as outf: outf.write(newcontent) |