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1# -*- coding: utf-8 -*-
2#
3# Random/__init__.py : PyCrypto random number generation
4#
5# ===================================================================
6# The contents of this file are dedicated to the public domain. To
7# the extent that dedication to the public domain is not available,
8# everyone is granted a worldwide, perpetual, royalty-free,
9# non-exclusive license to exercise all rights associated with the
10# contents of this file for any purpose whatsoever.
11# No rights are reserved.
12#
13# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
14# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
15# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
16# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
17# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
18# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
19# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20# SOFTWARE.
21# ===================================================================
23__all__ = ['new', 'get_random_bytes']
25from os import urandom
27class _UrandomRNG(object):
29 def read(self, n):
30 """Return a random byte string of the desired size."""
31 return urandom(n)
33 def flush(self):
34 """Method provided for backward compatibility only."""
35 pass
37 def reinit(self):
38 """Method provided for backward compatibility only."""
39 pass
41 def close(self):
42 """Method provided for backward compatibility only."""
43 pass
46def new(*args, **kwargs):
47 """Return a file-like object that outputs cryptographically random bytes."""
48 return _UrandomRNG()
51def atfork():
52 pass
55#: Function that returns a random byte string of the desired size.
56get_random_bytes = urandom