Viewing file:  utils.py (1.65 KB) -rw-r--r--
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# Copyright 2013 Donald Stufft and individual contributors
#
# 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 __future__ import absolute_import, division, print_function
import os
import six
class EncryptedMessage(bytes):
"""
A bytes subclass that holds a messaged that has been encrypted by a
:class:`SecretBox`.
"""
@classmethod
def _from_parts(cls, nonce, ciphertext, combined):
obj = cls(combined)
obj._nonce = nonce
obj._ciphertext = ciphertext
return obj
@property
def nonce(self):
"""
The nonce used during the encryption of the :class:`EncryptedMessage`.
"""
return self._nonce
@property
def ciphertext(self):
"""
The ciphertext contained within the :class:`EncryptedMessage`.
"""
return self._ciphertext
class StringFixer(object):
def __str__(self):
if six.PY3:
return str(self.__bytes__())
else:
return self.__bytes__()
def bytes_as_string(bytes_in):
if six.PY3:
return bytes_in.decode('ascii')
else:
return bytes_in
def random(size=32):
return os.urandom(size)
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