openmedialibrary_platform_win32/Lib/site-packages/Crypto/Random/OSRNG/fallback.py

#
#  Random/OSRNG/fallback.py : Fallback entropy source for systems with os.urandom
#
# Written in 2008 by Dwayne C. Litzenberger <dlitz@dlitz.net>
#
# ===================================================================
# 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.
# ===================================================================


__revision__ = "$Id$"
__all__ = ['PythonOSURandomRNG']

import os

from .rng_base import BaseRNG

class PythonOSURandomRNG(BaseRNG):

    name = "<os.urandom>"

    def __init__(self):
        self._read = os.urandom
        BaseRNG.__init__(self)

    def _close(self):
        self._read = None

def new(*args, **kwargs):
    return PythonOSURandomRNG(*args, **kwargs)

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