Not sure how to use it on downloaded file.

[Michaelwhite34]

I tried to use
import os
from Crypto.Cipher import AES

class ArkAssets:
CHAT_MASK = bytes.fromhex('554954704169383270484157776e7a7148524d4377506f6e4a4c49423357436c').decode()

@staticmethod
def text_asset_decrypt(stream, has_rsa: bool = True) -> bytes:
    aes_key = ArkAssets.CHAT_MASK[:16].encode()
    aes_iv  = bytearray(16)
    data = stream[128:] if has_rsa else stream
    buf = data[:16]
    mask = ArkAssets.CHAT_MASK[16:].encode()
    for i in range(len(buf)):
        aes_iv[i] = buf[i] ^ mask[i]
    aes_obj = AES.new(aes_key, AES.MODE_CBC, aes_iv)
    decrypt_buf = aes_obj.decrypt(data[16:])
    unpad = lambda s: s[0:(len(s) - s[-1])]
    return unpad(decrypt_buf)

Get the current folder path

folder_path = os.getcwd()

Get all files in the current folder

file_list = os.listdir(folder_path)

Decrypt each byte file in the folder

for file_name in file_list:
if os.path.isfile(file_name):
with open(file_name, 'rb') as file:
encrypted_data = file.read()
decrypted_data = ArkAssets.text_asset_decrypt(encrypted_data)
new_file_name = file_name + '.decrypted'
with open(new_file_name, 'wb') as decrypted_file:
decrypted_file.write(decrypted_data)
But it doesn't work, I am not familar with code - -. I am only trying to decrypt bytes files in assets/AB/Android/gamedata/excel folder and repack them.