diff options
| -rw-r--r-- | youtube_dl/extractor/youtube.py | 37 |
1 files changed, 19 insertions, 18 deletions
diff --git a/youtube_dl/extractor/youtube.py b/youtube_dl/extractor/youtube.py index b1e2edf75..91cd2192f 100644 --- a/youtube_dl/extractor/youtube.py +++ b/youtube_dl/extractor/youtube.py @@ -179,24 +179,25 @@ class YoutubeIE(InfoExtractor): def _decrypt_signature(self, s): """Turn the encrypted s field into a working signature""" - def voodoo(a, b): - c = a[0]; - a[0] = a[b % len(a)]; - a[b] = c; - return a; - - s = list(s) - s = s[2:len(s)]; - s = s[::-1]; - s = s[3:len(s)]; - s = voodoo(s, 9); - s = s[3:len(s)]; - s = voodoo(s, 43); - s = s[3:len(s)]; - s = s[::-1]; - s = voodoo(s, 23); - s = "".join(s); - return s; + if len(s) == 88: + return s[48] + s[81:67:-1] + s[82] + s[66:62:-1] + s[85] + s[61:48:-1] + s[67] + s[47:12:-1] + s[3] + s[11:3:-1] + s[2] + s[12] + elif len(s) == 87: + return s[62] + s[82:62:-1] + s[83] + s[61:52:-1] + s[0] + s[51:2:-1] + elif len(s) == 86: + return s[2:63] + s[82] + s[64:82] + s[63] + elif len(s) == 85: + return s[76] + s[82:76:-1] + s[83] + s[75:60:-1] + s[0] + s[59:50:-1] + s[1] + s[49:2:-1] + elif len(s) == 84: + return s[83:36:-1] + s[2] + s[35:26:-1] + s[3] + s[25:3:-1] + s[26] + elif len(s) == 83: + return s[6] + s[3:6] + s[33] + s[7:24] + s[0] + s[25:33] + s[53] + s[34:53] + s[24] + s[54:] + elif len(s) == 82: + return s[36] + s[79:67:-1] + s[81] + s[66:40:-1] + s[33] + s[39:36:-1] + s[40] + s[35] + s[0] + s[67] + s[32:0:-1] + s[34] + elif len(s) == 81: + return s[6] + s[3:6] + s[33] + s[7:24] + s[0] + s[25:33] + s[2] + s[34:53] + s[24] + s[54:81] + + else: + raise ExtractorError(u'Unable to decrypt signature, key length %d not supported; retrying might work' % (len(s))) def _get_available_subtitles(self, video_id): self.report_video_subtitles_download(video_id) |