def __init__(self, devname = None):
if devname is None:
self.name = '/dev/urandom'
else:
self.name = devname
f = open(self.name, 'rb', 0)
fmode = os.fstat(f.fileno())[stat.ST_MODE]
if not stat.S_ISCHR(fmode):
f.close()
raise TypeError('%r is not a character special device' % (self.name,))
self.__file = f
BaseRNG.__init__(self)
def __init__(self, devname=None):
if devname is None:
self.name = '/dev/urandom'
else:
self.name = devname
f = open(self.name, 'rb', 0)
fmode = os.fstat(f.fileno())[stat.ST_MODE]
if not stat.S_ISCHR(fmode):
f.close()
raise TypeError('%r is not a character special device' %
(self.name, ))
self.__file = f
BaseRNG.__init__(self)
return
def __init__(self, devname=None):
if devname is None:
self.name = "/dev/urandom"
else:
self.name = devname
# Test that /dev/urandom is a character special device
f = open(self.name, "rb", 0)
fmode = os.fstat(f.fileno())[stat.ST_MODE]
if not stat.S_ISCHR(fmode):
f.close()
raise TypeError("%r is not a character special device" % (self.name,))
self.__file = f
BaseRNG.__init__(self)
def __init__(self, devname=None):
if devname is None:
self.name = "/dev/urandom"
else:
self.name = devname
# Test that /dev/urandom is a character special device
f = open(self.name, "rb", 0)
fmode = os.fstat(f.fileno())[stat.ST_MODE]
if not stat.S_ISCHR(fmode):
f.close()
raise TypeError("%r is not a character special device" % (self.name,))
self.__file = f
BaseRNG.__init__(self)
def flush(self):
"""Work around weakness in Windows RNG.
The CryptGenRandom mechanism in some versions of Windows allows an
attacker to learn 128 KiB of past and future output. As a workaround,
this function reads 128 KiB of 'random' data from Windows and discards
it.
For more information about the weaknesses in CryptGenRandom, see
_Cryptanalysis of the Random Number Generator of the Windows Operating
System_, by Leo Dorrendorf and Zvi Gutterman and Benny Pinkas
http://eprint.iacr.org/2007/419
"""
if self.closed:
raise ValueError("I/O operation on closed file")
data = self.__winrand.get_bytes(128*1024)
assert (len(data) == 128*1024)
BaseRNG.flush(self)
def flush(self):
"""Work around weakness in Windows RNG.
The CryptGenRandom mechanism in some versions of Windows allows an
attacker to learn 128 KiB of past and future output. As a workaround,
this function reads 128 KiB of 'random' data from Windows and discards
it.
For more information about the weaknesses in CryptGenRandom, see
_Cryptanalysis of the Random Number Generator of the Windows Operating
System_, by Leo Dorrendorf and Zvi Gutterman and Benny Pinkas
http://eprint.iacr.org/2007/419
"""
if self.closed:
raise ValueError("I/O operation on closed file")
data = self.__winrand.get_bytes(128 * 1024)
assert (len(data) == 128 * 1024)
BaseRNG.flush(self)
def __init__(self):
self._read = os.urandom
BaseRNG.__init__(self)
def __init__(self):
self.__winrand = winrandom.new()
BaseRNG.__init__(self)
def __init__(self):
self._read = os.urandom
BaseRNG.__init__(self)
def __init__(self):
self.__winrand = winrandom.new()
BaseRNG.__init__(self)
def flush(self):
if self.closed:
raise ValueError('I/O operation on closed file')
data = self.__winrand.get_bytes(131072)
BaseRNG.flush(self)
def flush(self):
if self.closed:
raise ValueError('I/O operation on closed file')
data = self.__winrand.get_bytes(131072)
assert len(data) == 131072
BaseRNG.flush(self)
