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Revert "[youtube] improved decrypt_signature, closes #1060"
This reverts commit fe6fad1242
and closes #1066.
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bf85454116
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@ -179,24 +179,25 @@ def report_rtmp_download(self):
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def _decrypt_signature(self, s):
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"""Turn the encrypted s field into a working signature"""
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def voodoo(a, b):
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c = a[0];
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a[0] = a[b % len(a)];
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a[b] = c;
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return a;
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if len(s) == 88:
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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]
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elif len(s) == 87:
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return s[62] + s[82:62:-1] + s[83] + s[61:52:-1] + s[0] + s[51:2:-1]
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elif len(s) == 86:
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return s[2:63] + s[82] + s[64:82] + s[63]
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elif len(s) == 85:
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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]
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elif len(s) == 84:
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return s[83:36:-1] + s[2] + s[35:26:-1] + s[3] + s[25:3:-1] + s[26]
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elif len(s) == 83:
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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:]
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elif len(s) == 82:
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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]
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elif len(s) == 81:
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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]
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s = list(s)
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s = s[2:len(s)];
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s = s[::-1];
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s = s[3:len(s)];
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s = voodoo(s, 9);
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s = s[3:len(s)];
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s = voodoo(s, 43);
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s = s[3:len(s)];
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s = s[::-1];
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s = voodoo(s, 23);
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s = "".join(s);
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return s;
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else:
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raise ExtractorError(u'Unable to decrypt signature, key length %d not supported; retrying might work' % (len(s)))
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def _get_available_subtitles(self, video_id):
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self.report_video_subtitles_download(video_id)
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