RSA Key Generation in PyCrypto

In the PyCrypto module for Python the RSA key generator takes a random byte generator to create new keys. The documentation recommends that only a cryptographically secure pseudo random number generator (CSPRNG) be used due to some enhanced security features. The module contains a built-in CSPRNG:

import Crypto
num_bytes = 32
print Crypto.Random.new().read(num_bytes)

Another option however is Microsoft's CryptGenRandom() function. Luckily, in Python, this is easily accessed via the "os" module (os.urandom):

import os
num_bytes = 32
print os.urandom(num_bytes)

Another option for a CSPRNG is Intel's Digital random number generator (DRNG). I didn't even know this existed until recently. If you are fortunate enough to have an Ivy Bridge processor (or later) you will be able to make use of this. Intel has implemented a hardware true CSPRNG in the chip (the generated numbers are truly random). My next project will be to make use of this RNG in Python and PyCrypto.