A platform independent entropy source https://github.com/TomMD/entropy

Version on this page:0.3.8
LTS Haskell 11.1:0.3.8
Stackage Nightly 2018-03-20:
Latest on Hackage:

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BSD3 licensed and maintained by Thomas DuBuisson

Module documentation for 0.3.8


This package allows Haskell users to easily acquire entropy for use in critical security applications by calling out to either windows crypto api, unix/linux's /dev/urandom. Hardware RNGs (currently RDRAND, patches welcome) are supported via the hardwareRNG function.

If you wish to obtain an XOR of the hardware and system RNG consider:

import           Data.Bits (xor)
import qualified Data.ByteString as B
import qualified Control.Exception as X

xorRNG sz = do hw  <- hardwareRNG sz
               h   <- openHandle
               sys <- hGetEntropy h `X.finally` closeHandle h
               pure $ B.pack $ B.zipWith xor hw sys

This package supports Windows, {li,u}nix, QNX, and has preliminary support for HaLVM.

Typically tested on Linux and OSX - testers are as welcome as patches.

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