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1# SPDX-FileCopyrightText: 2026 Helder Eijs <helderijs@gmail.com>
2# SPDX-License-Identifier: BSD-2-Clause
4"""The order in which the methods of a cipher object can be called.
6Each cipher object keeps in ``self._next`` the methods that the caller
7may invoke next. Each method checks that it is in ``self._next`` (or raises
8``TypeError``), and then sets ``self._next`` to the methods allowed after it.
9"""
11from enum import Enum
14class Method(Enum):
15 """A method of a cipher object"""
17 UPDATE = "update"
18 ENCRYPT = "encrypt"
19 DECRYPT = "decrypt"
20 DIGEST = "digest"
21 VERIFY = "verify"