def _open_winrandom():
if _winrandom is None:
raise error("Crypto.Util.winrandom module not found")
# Check that we can open the winrandom module
try:
r0 = _winrandom.new()
r1 = _winrandom.new()
except Exception, exc:
raise error("winrandom.new() failed: %s" % str(exc), exc)
def _randomize(self, N=0, devname='/dev/urandom'):
"""_randomize(N, DEVNAME:device-filepath)
collects N bits of randomness from some entropy source (e.g.,
/dev/urandom on Unixes that have it, Windows CryptoAPI
CryptGenRandom, etc)
DEVNAME is optional, defaults to /dev/urandom. You can change it
to /dev/random if you want to block till you get enough
entropy.
"""
data = ''
if N <= 0:
nbytes = int((self.bits - self.entropy) / 8 + 0.5)
else:
nbytes = int(N / 8 + 0.5)
if winrandom:
# Windows CryptGenRandom provides random data.
data = winrandom.new().get_bytes(nbytes)
elif os.path.exists(devname):
# Many OSes support a /dev/urandom device
try:
f = open(devname)
data = f.read(nbytes)
f.close()
except IOError, (num, msg):
if num != 2: raise IOError, (num, msg)
def _randomize(self, N = 0, devname = '/dev/urandom'):
"""_randomize(N, DEVNAME:device-filepath)
collects N bits of randomness from some entropy source (e.g.,
/dev/urandom on Unixes that have it, Windows CryptoAPI
CryptGenRandom, etc)
DEVNAME is optional, defaults to /dev/urandom. You can change it
to /dev/random if you want to block till you get enough
entropy.
"""
data = ''
if N <= 0:
nbytes = int((self.bits - self.entropy)/8+0.5)
else:
nbytes = int(N/8+0.5)
if winrandom:
# Windows CryptGenRandom provides random data.
data = winrandom.new().get_bytes(nbytes)
elif os.path.exists(devname):
# Many OSes support a /dev/urandom device
try:
f=open(devname)
data=f.read(nbytes)
f.close()
except IOError, (num, msg):
if num!=2: raise IOError, (num, msg)
def _randomize(self, N=0, devname='/dev/urandom'):
"""_randomize(N, DEVNAME:device-filepath)
collects N bits of randomness from some entropy source (e.g.,
/dev/urandom on Unixes that have it, Windows CryptoAPI
CryptGenRandom, etc)
DEVNAME is optional, defaults to /dev/urandom. You can change it
to /dev/random if you want to block till you get enough
entropy.
"""
data = ''
if N <= 0:
nbytes = int((self.bits - self.entropy) / 8 + 0.5)
else:
nbytes = int(N / 8 + 0.5)
if winrandom:
# Windows CryptGenRandom provides random data.
data = winrandom.new().get_bytes(nbytes)
# GAE fix, benadida
# elif os.path.exists(devname):
# Many OSes support a /dev/urandom device
# try:
# f=open(devname)
# data=f.read(nbytes)
# f.close()
# except IOError, (num, msg):
# if num!=2: raise IOError, (num, msg)
# If the file wasn't found, ignore the error
if data:
self._addBytes(data)
# Entropy estimate: The number of bits of
# data obtained from the random source.
self._updateEntropyEstimate(8 * len(data))
self.stir_n() # Wash the random pool
def _randomize(self, N=0, devname='/dev/urandom'):
"""_randomize(N, DEVNAME:device-filepath)
collects N bits of randomness from some entropy source (e.g.,
/dev/urandom on Unixes that have it, Windows CryptoAPI
CryptGenRandom, etc)
DEVNAME is optional, defaults to /dev/urandom. You can change it
to /dev/random if you want to block till you get enough
entropy.
"""
data = ''
if N <= 0:
nbytes = int((self.bits - self.entropy) / 8 + 0.5)
else:
nbytes = int(N / 8 + 0.5)
if winrandom:
# Windows CryptGenRandom provides random data.
data = winrandom.new().get_bytes(nbytes)
elif os.path.exists(devname):
# Many OSes support a /dev/urandom device
try:
f = open(devname)
data = f.read(nbytes)
f.close()
except IOError as xxx_todo_changeme:
(num, msg) = xxx_todo_changeme.args
if num != 2: raise IOError(num, msg)
# If the file wasn't found, ignore the error
if data:
self._addBytes(data)
# Entropy estimate: The number of bits of
# data obtained from the random source.
self._updateEntropyEstimate(8 * len(data))
self.stir_n() # Wash the random pool
def runTest(self):
"""winrandom: simple test"""
# Import the winrandom module and try to use it
from Crypto.Util import winrandom
randobj = winrandom.new()
x = randobj.get_bytes(16)
y = randobj.get_bytes(16)
self.assertNotEqual(x, y)
def runTest(self):
"""winrandom: simple test"""
# Import the winrandom module and try to use it
from Crypto.Util import winrandom
randobj = winrandom.new()
x = randobj.get_bytes(16)
y = randobj.get_bytes(16)
self.assertNotEqual(x, y)
def __init__(self, numbytes=160, cipher=None, hash=None):
self._wr = winrandom.new()
self.get_bytes = self._wr.get_bytes
self.randomize()
def __init__(self, numbytes=160, cipher=None, hash=None):
self._wr = winrandom.new()
self.get_bytes = self._wr.get_bytes
self.randomize()
