olm/python/olm/_compat.py
Hubert Chathi 5ef6a844d6 overwrite buffers that may contain sensitive data
also reduce the amount of memory copying that we do
2018-10-16 00:31:56 -04:00

46 lines
1.4 KiB
Python

# -*- coding: utf-8 -*-
# libolm python bindings
# Copyright © 2015-2017 OpenMarket Ltd
# Copyright © 2018 Damir Jelić <poljar@termina.org.uk>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from builtins import bytes, str
from typing import AnyStr
try:
import secrets
URANDOM = secrets.token_bytes # pragma: no cover
except ImportError: # pragma: no cover
from os import urandom
URANDOM = urandom # type: ignore
def to_bytearray(string):
# type: (AnyStr) -> bytes
if isinstance(string, bytes):
return bytearray(string)
elif isinstance(string, str):
return bytearray(string, "utf-8")
raise TypeError("Invalid type {}".format(type(string)))
def to_bytes(string):
# type: (AnyStr) -> bytes
if isinstance(string, bytes):
return string
elif isinstance(string, str):
return bytes(string, "utf-8")
raise TypeError("Invalid type {}".format(type(string)))