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[aes] Add unpad_pkcs7

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pukkandan
2022-01-31 20:19:33 +05:30
parent c533c89ce1
commit 1d3586d0d5
8 changed files with 45 additions and 53 deletions
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16
yt_dlp/extractor/adn.py
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@ -8,11 +8,10 @@ import os
import random
from .common import InfoExtractor
from ..aes import aes_cbc_decrypt
from ..aes import aes_cbc_decrypt_bytes, unpad_pkcs7
from ..compat import (
compat_HTTPError,
compat_b64decode,
compat_ord,
)
from ..utils import (
ass_subtitles_timecode,
@ -84,14 +83,11 @@ class ADNIE(InfoExtractor):
return None
# http://animedigitalnetwork.fr/components/com_vodvideo/videojs/adn-vjs.min.js
dec_subtitles = intlist_to_bytes(aes_cbc_decrypt(
bytes_to_intlist(compat_b64decode(enc_subtitles[24:])),
bytes_to_intlist(binascii.unhexlify(self._K + 'ab9f52f5baae7c72')),
bytes_to_intlist(compat_b64decode(enc_subtitles[:24]))
))
subtitles_json = self._parse_json(
dec_subtitles[:-compat_ord(dec_subtitles[-1])].decode(),
None, fatal=False)
dec_subtitles = unpad_pkcs7(aes_cbc_decrypt_bytes(
compat_b64decode(enc_subtitles[24:]),
binascii.unhexlify(self._K + 'ab9f52f5baae7c72'),
compat_b64decode(enc_subtitles[:24])))
subtitles_json = self._parse_json(dec_subtitles.decode(), None, fatal=False)
if not subtitles_json:
return None