Fernet Encrypt_key и Decrypt_key одинаковы, но все равно выдают ошибку

Я создал шифрование и расшифровку файла fernet с помощью python-cryptography. Я могу зашифровать файл, но когда я расшифровываю файл с тем же ключом, я получаю ошибку недействительного токена.

Код: ENCRYPTION & DECRYPTION

def encrypt_file(blob_name):
    key = key_gen()
    
    fernet = Fernet(key)
    
    with open(os.path.join('./static/temp/', blob_name), 'rb') as file:
        original = file.read()
        
    encrypted = fernet.encrypt(original)
    
    with open(os.path.join('./static/temp/', blob_name), 'wb') as encrypted_file:
        encrypted_file.write(encrypted)

def decrypt_file(blob_name):
    print(blob_name)
    with open('./static/temp/filekey.key', 'rb') as filekey:
        key = filekey.read()

    fernet = Fernet(key)
    
    with open('./static/temp/'+blob_name, 'rb') as enc_file:
        print(enc_file)
        encrypted = enc_file.read()
    print(encrypted)

    decrypted = fernet.decrypt(encrypted)
    print(decrypted)

    with open(os.path.join('./static/temp/', blob_name), 'wb') as dec_file:
        dec_file.write(decrypted)

Дерево папок:

project_folder
-static
-- temp
--- blob_name
app.py
gcpdata.py

Ошибка:

Traceback (most recent call last):
  File "\AppData\Local\Programs\Python\Python39\lib\site-packages\flask\app.py", line 2077, in wsgi_app
    response = self.full_dispatch_request()
  File "\AppData\Local\Programs\Python\Python39\lib\site-packages\flask\app.py", line 1525, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "\AppData\Local\Programs\Python\Python39\lib\site-packages\flask\app.py", line 1523, in full_dispatch_request
    rv = self.dispatch_request()
  File "\AppData\Local\Programs\Python\Python39\lib\site-packages\flask\app.py", line 1509, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**req.view_args)
  File "\PROJECT\app.py", line 47, in download
    decrypt_file('./static/temp/'+list_blobs(bucket_name))
  File "\PROJECT\gcpdata.py", line 117, in decrypt_file
    decrypted_data = f.decrypt(encrypted_data)
  File "\AppData\Local\Programs\Python\Python39\lib\site-packages\cryptography\fernet.py", line 88, in decrypt
    return self._decrypt_data(data, timestamp, time_info)
  File "\AppData\Local\Programs\Python\Python39\lib\site-packages\cryptography\fernet.py", line 145, in _decrypt_data
    self._verify_signature(data)
  File "\AppData\Local\Programs\Python\Python39\lib\site-packages\cryptography\fernet.py", line 129, in _verify_signature
    raise InvalidToken
cryptography.fernet.InvalidToken

Вернуться на верх