-- | -- Module : Crypto.Random.Entropy.Source -- License : BSD-style -- Maintainer : Vincent Hanquez <vincent@snarc.org> -- Stability : experimental -- Portability : Good -- module Crypto.Random.Entropy.Source where import Foreign.Ptr import Data.Word (Word8) -- | A handle to an entropy maker, either a system capability -- or a hardware generator. class EntropySource a where -- | try to open an handle for this source entropyOpen :: IO (Maybe a) -- | try to gather a number of entropy bytes into a buffer. -- return the number of actual bytes gathered entropyGather :: a -> Ptr Word8 -> Int -> IO Int -- | Close an open handle entropyClose :: a -> IO ()