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Add a clean-room implementation for youtube signatures

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This commit is contained in:
Philipp Hagemeister 2013-06-27 01:51:10 +02:00
parent 5746f9da99
commit 6b37f0be55
2 changed files with 53 additions and 8 deletions
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35
test/test_youtube_sig.py
View file

@ -18,5 +18,40 @@ class TestYoutubeSig(unittest.TestCase):
right = '931EA22157E1871643FA9519676DED253A342B0C.4E95A5DBD2F1F511DCC1209DF56CB77693CE0EAE'
self.assertEqual(sig(wrong), right)
def test_88(self):
wrong = "qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[]}|:;?/>.<"
right = "J:|}][{=+-_)(*&;%$#@>MNBVCXZASDFGH^KLPOIUYTREWQ0987654321mnbvcxzasdfghrklpoiuytej"
self.assertEqual(sig(wrong), right)
def test_87(self):
wrong = "qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$^&*()_-+={[]}|:;?/>.<"
right = "!?;:|}][{=+-_)(*&^$#@/MNBVCXZASqFGHJKLPOIUYTREWQ0987654321mnbvcxzasdfghjklpoiuytr"
self.assertEqual(sig(wrong), right)
def test_86(self):
wrong = "qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[|};?/>.<"
right = "ertyuioplkjhgfdqazxcvbnm1234567890QWERT}UIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[|/;?Y"
self.assertEqual(sig(wrong), right)
def test_85(self):
wrong = "qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[};?/>.<"
right = "{>/?;}[.=+-_)(*&^%$#@!MqBVCXZASDFwHJKLPOIUYTREWQ0987654321mnbvcxzasdfghjklpoiuytr"
self.assertEqual(sig(wrong), right)
def test_84(self):
wrong = "qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[};?>.<"
right = "<.>?;}[{=+-_)(*&^%$#@!MNBVCXZASDFGHJKLPOIUYTREWe098765432rmnbvcxzasdfghjklpoiuyt1"
self.assertEqual(sig(wrong), right)
def test_83(self):
wrong = "qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!#$%^&*()_+={[};?/>.<"
right = "D.>/?;}[{=+_)(*&^%$#!MNBVCXeAS<FGHJKLPOIUYTREWZ0987654321mnbvcxzasdfghjklpoiuytrQ"
self.assertEqual(sig(wrong), right)
def test_82(self):
wrong = "qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKHGFDSAZXCVBNM!@#$%^&*(-+={[};?/>.<"
right = "Q>/?;}[{=+-(*<^%$#@!MNBVCXZASDFGHKLPOIUY8REWT0q&7654321mnbvcxzasdfghjklpoiuytrew9"
self.assertEqual(sig(wrong), right)
if __name__ == '__main__':
unittest.main()

26
youtube_dl/extractor/youtube.py
View file

@ -131,15 +131,25 @@ class YoutubeIE(InfoExtractor):
def _decrypt_signature(self, s):
"""Decrypt the key the two subkeys must have a length of 43"""
(a,b) = s.split('.')
if len(a) != 43 or len(b) != 43:
raise ExtractorError(u'Unable to decrypt signature, subkeys lengths %d.%d not supported; retrying might work' % (len(a), len(b)))
if self._downloader.params.get('verbose'):
self.to_screen('encrypted signature length %d.%d' % (len(a), len(b)))
b = ''.join([b[:8],a[0],b[9:18],b[-4],b[19:39], b[18]])[0:40]
a = a[-40:]
s_dec = '.'.join((a,b))[::-1]
return s_dec
self.to_screen('encrypted signature length %d' % (len(s)))
if len(s) == 88:
return s[48] + s[81] + s[80] + s[79] + s[78] + s[77] + s[76] + s[75] + s[74] + s[73] + s[72] + s[71] + s[70] + s[69] + s[68] + s[82] + s[66] + s[65] + s[64] + s[63] + s[85] + s[61] + s[60] + s[59] + s[58] + s[57] + s[56] + s[55] + s[54] + s[53] + s[52] + s[51] + s[50] + s[49] + s[67] + s[47] + s[46] + s[45] + s[44] + s[43] + s[42] + s[41] + s[40] + s[39] + s[38] + s[37] + s[36] + s[35] + s[34] + s[33] + s[32] + s[31] + s[30] + s[29] + s[28] + s[27] + s[26] + s[25] + s[24] + s[23] + s[22] + s[21] + s[20] + s[19] + s[18] + s[17] + s[16] + s[15] + s[14] + s[13] + s[3] + s[11] + s[10] + s[9] + s[8] + s[7] + s[6] + s[5] + s[4] + s[2] + s[12]
elif len(s) == 87:
return s[62] + s[82] + s[81] + s[80] + s[79] + s[78] + s[77] + s[76] + s[75] + s[74] + s[73] + s[72] + s[71] + s[70] + s[69] + s[68] + s[67] + s[66] + s[65] + s[64] + s[63] + s[83] + s[61] + s[60] + s[59] + s[58] + s[57] + s[56] + s[55] + s[54] + s[53] + s[0] + s[51] + s[50] + s[49] + s[48] + s[47] + s[46] + s[45] + s[44] + s[43] + s[42] + s[41] + s[40] + s[39] + s[38] + s[37] + s[36] + s[35] + s[34] + s[33] + s[32] + s[31] + s[30] + s[29] + s[28] + s[27] + s[26] + s[25] + s[24] + s[23] + s[22] + s[21] + s[20] + s[19] + s[18] + s[17] + s[16] + s[15] + s[14] + s[13] + s[12] + s[11] + s[10] + s[9] + s[8] + s[7] + s[6] + s[5] + s[4] + s[3]
elif len(s) == 86:
return s[2] + s[3] + s[4] + s[5] + s[6] + s[7] + s[8] + s[9] + s[10] + s[11] + s[12] + s[13] + s[14] + s[15] + s[16] + s[0] + s[18] + s[19] + s[20] + s[21] + s[22] + s[23] + s[24] + s[25] + s[26] + s[27] + s[28] + s[29] + s[30] + s[31] + s[32] + s[33] + s[34] + s[35] + s[36] + s[37] + s[38] + s[39] + s[40] + s[79] + s[42] + s[43] + s[44] + s[45] + s[46] + s[47] + s[48] + s[49] + s[50] + s[51] + s[52] + s[53] + s[54] + s[55] + s[56] + s[57] + s[58] + s[59] + s[60] + s[61] + s[62] + s[63] + s[64] + s[65] + s[66] + s[67] + s[68] + s[69] + s[70] + s[71] + s[72] + s[73] + s[74] + s[75] + s[76] + s[77] + s[78] + s[82] + s[80] + s[81] + s[41]
elif len(s) == 85:
return s[76] + s[82] + s[81] + s[80] + s[79] + s[78] + s[77] + s[83] + s[75] + s[74] + s[73] + s[72] + s[71] + s[70] + s[69] + s[68] + s[67] + s[66] + s[65] + s[64] + s[63] + s[62] + s[61] + s[0] + s[59] + s[58] + s[57] + s[56] + s[55] + s[54] + s[53] + s[52] + s[51] + s[1] + s[49] + s[48] + s[47] + s[46] + s[45] + s[44] + s[43] + s[42] + s[41] + s[40] + s[39] + s[38] + s[37] + s[36] + s[35] + s[34] + s[33] + s[32] + s[31] + s[30] + s[29] + s[28] + s[27] + s[26] + s[25] + s[24] + s[23] + s[22] + s[21] + s[20] + s[19] + s[18] + s[17] + s[16] + s[15] + s[14] + s[13] + s[12] + s[11] + s[10] + s[9] + s[8] + s[7] + s[6] + s[5] + s[4] + s[3]
elif len(s) == 84:
return s[83] + s[82] + s[81] + s[80] + s[79] + s[78] + s[77] + s[76] + s[75] + s[74] + s[73] + s[72] + s[71] + s[70] + s[69] + s[68] + s[67] + s[66] + s[65] + s[64] + s[63] + s[62] + s[61] + s[60] + s[59] + s[58] + s[57] + s[56] + s[55] + s[54] + s[53] + s[52] + s[51] + s[50] + s[49] + s[48] + s[47] + s[46] + s[45] + s[44] + s[43] + s[42] + s[41] + s[40] + s[39] + s[38] + s[37] + s[2] + s[35] + s[34] + s[33] + s[32] + s[31] + s[30] + s[29] + s[28] + s[27] + s[3] + s[25] + s[24] + s[23] + s[22] + s[21] + s[20] + s[19] + s[18] + s[17] + s[16] + s[15] + s[14] + s[13] + s[12] + s[11] + s[10] + s[9] + s[8] + s[7] + s[6] + s[5] + s[4] + s[26]
elif len(s) == 83:
return s[52] + s[81] + s[80] + s[79] + s[78] + s[77] + s[76] + s[75] + s[74] + s[73] + s[72] + s[71] + s[70] + s[69] + s[68] + s[67] + s[66] + s[65] + s[64] + s[63] + s[62] + s[61] + s[60] + s[59] + s[58] + s[57] + s[56] + s[2] + s[54] + s[53] + s[82] + s[51] + s[50] + s[49] + s[48] + s[47] + s[46] + s[45] + s[44] + s[43] + s[42] + s[41] + s[40] + s[39] + s[38] + s[37] + s[55] + s[35] + s[34] + s[33] + s[32] + s[31] + s[30] + s[29] + s[28] + s[27] + s[26] + s[25] + s[24] + s[23] + s[22] + s[21] + s[20] + s[19] + s[18] + s[17] + s[16] + s[15] + s[14] + s[13] + s[12] + s[11] + s[10] + s[9] + s[8] + s[7] + s[6] + s[5] + s[4] + s[3] + s[36]
elif len(s) == 82:
return s[36] + s[79] + s[78] + s[77] + s[76] + s[75] + s[74] + s[73] + s[72] + s[71] + s[70] + s[69] + s[68] + s[81] + s[66] + s[65] + s[64] + s[63] + s[62] + s[61] + s[60] + s[59] + s[58] + s[57] + s[56] + s[55] + s[54] + s[53] + s[52] + s[51] + s[50] + s[49] + s[48] + s[47] + s[46] + s[45] + s[44] + s[43] + s[42] + s[41] + s[33] + s[39] + s[38] + s[37] + s[40] + s[35] + s[0] + s[67] + s[32] + s[31] + s[30] + s[29] + s[28] + s[27] + s[26] + s[25] + s[24] + s[23] + s[22] + s[21] + s[20] + s[19] + s[18] + s[17] + s[16] + s[15] + s[14] + s[13] + s[12] + s[11] + s[10] + s[9] + s[8] + s[7] + s[6] + s[5] + s[4] + s[3] + s[2] + s[1] + s[34]
else:
raise ExtractorError(u'Unable to decrypt signature, subkeys length %d not supported; retrying might work' % (len(s)))
def _get_available_subtitles(self, video_id):
self.report_video_subtitles_download(video_id)