Crypto.Random.OSRNG.nt.WindowsRNG

Class WindowsRNG

object --+ | rng_base.BaseRNG --+ | WindowsRNG

Instance Methods

__init__(self)
x.__init__(...) initializes x; see help(type(x)) for signature

flush(self)
Work around weakness in Windows RNG.

Inherited from object: __delattr__, __format__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __repr__, __setattr__, __sizeof__, __str__, __subclasshook__

Inherited from rng_base.BaseRNG

__del__(self)

__enter__(self)

__exit__(self)
PEP 343 support

close(self)

read(self, N=-1)
Return N bytes from the RNG.

Class Variables

name = "<CryptGenRandom>"

Properties

Inherited from object: __class__

Method Details

init(self)
(Constructor)

x.__init__(...) initializes x; see help(type(x)) for signature

Overrides: object.__init__: (inherited documentation)

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

Overrides: rng_base.BaseRNG.flush

Class WindowsRNG

__init__(self) (Constructor)

flush(self)

init(self)
(Constructor)