def decrypt(self):

    #  exact same as above function except in reverse

    cipher_object = AES.new(
        self.hashed_key_salt["key"], AES.MODE_CFB, self.hashed_key_salt["salt"]
    )

    self.abort()  # if the output file already exists, remove it first

    input_file = open(self.user_file, "rb")
    output_file = open(self.decrypt_output_file, "xb")
    done_chunks = 0

    for piece in self.read_in_chunks(input_file):
        decrypted_content = cipher_object.decrypt(piece)
        output_file.write(decrypted_content)
        done_chunks += 1
        yield done_chunks / self.total_chunks * 100

    input_file.close()
    output_file.close()

    # clean up the cipher object

    del cipher_object