58 lines
1.8 KiB
Python
58 lines
1.8 KiB
Python
|
# -*- coding: utf-8 -*-
|
||
|
|
#
|
||
|
|
# Random/__init__.py : PyCryptodome random number generation
|
||
|
|
#
|
||
|
|
# ===================================================================
|
||
|
|
# The contents of this file are dedicated to the public domain. To
|
||
|
|
# the extent that dedication to the public domain is not available,
|
||
|
|
# everyone is granted a worldwide, perpetual, royalty-free,
|
||
|
|
# non-exclusive license to exercise all rights associated with the
|
||
|
|
# contents of this file for any purpose whatsoever.
|
||
|
|
# No rights are reserved.
|
||
|
|
#
|
||
|
|
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
||
|
|
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||
|
|
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
||
|
|
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
||
|
|
# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
||
|
|
# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
||
|
|
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||
|
|
# SOFTWARE.
|
||
|
|
# ===================================================================
|
||
|
|
|
||
|
|
__all__ = ['new', 'get_random_bytes']
|
||
|
|
|
||
|
|
from os import urandom
|
||
|
|
|
||
|
|
class _UrandomRNG(object):
|
||
|
|
|
||
|
|
def read(self, n):
|
||
|
|
"""Return a random byte string of the desired size."""
|
||
|
|
return urandom(n)
|
||
|
|
|
||
|
|
def flush(self):
|
||
|
|
"""Method provided for backward compatibility only."""
|
||
|
|
pass
|
||
|
|
|
||
|
|
def reinit(self):
|
||
|
|
"""Method provided for backward compatibility only."""
|
||
|
|
pass
|
||
|
|
|
||
|
|
def close(self):
|
||
|
|
"""Method provided for backward compatibility only."""
|
||
|
|
pass
|
||
|
|
|
||
|
|
|
||
|
|
def new(*args, **kwargs):
|
||
|
|
"""Return a file-like object that outputs cryptographically random bytes."""
|
||
|
|
return _UrandomRNG()
|
||
|
|
|
||
|
|
|
||
|
|
def atfork():
|
||
|
|
pass
|
||
|
|
|
||
|
|
|
||
|
|
#: Function that returns a random byte string of the desired size.
|
||
|
|
get_random_bytes = urandom
|
||
|
|
|