[youtube] dynamic sig improvements
parent
e31c0d2576
commit
8c0ff392ea
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@ -1222,7 +1222,7 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
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return res
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def _parse_sig_js(self, js_player):
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shit_parser = re.search(r'[a-z]\=a\.split\((?:""|\'\')\);(([a-zA-Z]+).*);return a\.join', js_player)
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shit_parser = re.search(r'[a-z]\=a\.split\((?:""|\'\')\);(([a-zA-Z_][a-zA-Z\d_]+).*);return a\.join', js_player)
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if not shit_parser:
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raise ExtractorError('Signature decryption code not found')
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func, obfuscated_name = shit_parser.group(1, 2)
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@ -1232,31 +1232,38 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
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raise ExtractorError('Signature decrypting deobfuscated functions not found')
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obfuscated_stack = obfuscated_func.group(1)
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obf_map = {}
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for obffun in re.finditer(r'([a-zA-Z]{2}):function\(a(?:,b)?\){(.*?)}', obfuscated_stack):
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for obffun in re.finditer(r'([a-zA-Z_][a-zA-Z\d_]+):function\(a(?:,b)?\){(.*?)}', obfuscated_stack):
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obfname, obfval = obffun.group(1, 2)
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if obfval == 'a.splice(0,b)':
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if 'splice' in obfval:
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obf_map[obfname] = 'splice'
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elif obfval == 'a.reverse()':
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elif 'reverse' in obfval:
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obf_map[obfname] = 'reverse'
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elif obfval == 'var c=a[0];a[0]=a[b%a.length];a[b%a.length]=c':
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elif 'var' in obfval and 'length' in obfval:
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obf_map[obfname] = 'mess'
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else:
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raise ExtractorError('Unknown obfuscation function type: %s.%s' % (obfuscated_name, obfname))
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decryptor_stack = []
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for instruction in re.finditer(r'%s\.([a-zA-Z]{2})\(a,(\d+)\);' % re.escape(obfuscated_name),
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for instruction in re.finditer(r'%s\.([a-zA-Z_][a-zA-Z\d_]+)\(a,(\d+)\);?' % re.escape(obfuscated_name),
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func):
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obf_name, obf_arg = instruction.group(1, 2)
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inst = obf_map.get(obf_name)
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if inst == 'splice':
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decryptor_stack.append(lambda a: a[:int(obf_arg)])
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self.to_screen('%s %s %s' % (obf_name, inst, obf_arg))
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if not inst:
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raise ExtractorError('Unknown obfuscation function: %s.%s (1)' % (obfuscated_name, obf_name))
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elif inst == 'splice':
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decryptor_stack.append(lambda a: a[int(obf_arg):])
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elif inst == 'reverse':
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decryptor_stack.append(lambda a: reversed(a))
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elif inst == 'mess':
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decryptor_stack.append(lambda a: self.mess(a, int(obf_arg)))
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else:
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raise ExtractorError('Unknown obfuscation function: %s.%s (2)' % (obfuscated_name, obf_name))
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return decryptor_stack
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def _do_decrypt_signature(self, sig, stack):
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a = list(sig)
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for fun in stack:
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a = fun(a)
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a = list(fun(a))
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return ''.join(a)
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def _print_sig_code(self, func, example_sig):
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