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Filename : __init__.py
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# -*- coding: utf-8 -*-
#
#  Random/__init__.py : PyCrypto 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