82 lines
2.7 KiB
Python
82 lines
2.7 KiB
Python
#
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# randpool.py : Cryptographically strong random number generation
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#
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# Part of the Python Cryptography Toolkit
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#
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# Written by Andrew M. Kuchling, Mark Moraes, and others
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#
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# ===================================================================
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# The contents of this file are dedicated to the public domain. To
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# the extent that dedication to the public domain is not available,
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# everyone is granted a worldwide, perpetual, royalty-free,
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# non-exclusive license to exercise all rights associated with the
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# contents of this file for any purpose whatsoever.
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# No rights are reserved.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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# ===================================================================
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#
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__revision__ = "$Id$"
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from Crypto.pct_warnings import RandomPool_DeprecationWarning
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import Crypto.Random
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import warnings
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class RandomPool:
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"""Deprecated. Use Random.new() instead.
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See http://www.pycrypto.org/randpool-broken
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"""
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def __init__(self, numbytes = 160, cipher=None, hash=None, file=None):
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warnings.warn("This application uses RandomPool, which is BROKEN in older releases. See http://www.pycrypto.org/randpool-broken",
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RandomPool_DeprecationWarning)
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self.__rng = Crypto.Random.new()
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self.bytes = numbytes
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self.bits = self.bytes * 8
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self.entropy = self.bits
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def get_bytes(self, N):
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return self.__rng.read(N)
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def _updateEntropyEstimate(self, nbits):
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self.entropy += nbits
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if self.entropy < 0:
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self.entropy = 0
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elif self.entropy > self.bits:
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self.entropy = self.bits
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def _randomize(self, N=0, devname="/dev/urandom"):
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"""Dummy _randomize() function"""
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self.__rng.flush()
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def randomize(self, N=0):
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"""Dummy randomize() function"""
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self.__rng.flush()
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def stir(self, s=''):
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"""Dummy stir() function"""
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self.__rng.flush()
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def stir_n(self, N=3):
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"""Dummy stir_n() function"""
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self.__rng.flush()
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def add_event(self, s=''):
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"""Dummy add_event() function"""
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self.__rng.flush()
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def getBytes(self, N):
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"""Dummy getBytes() function"""
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return self.get_bytes(N)
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def addEvent(self, event, s=""):
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"""Dummy addEvent() function"""
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return self.add_event()
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