-- |
-- Module      : Crypto.Random
-- License     : BSD-style
-- Maintainer  : Vincent Hanquez <vincent@snarc.org>
-- Stability   : stable
-- Portability : good
--
module Crypto.Random
    (
    -- * Deterministic instances
      ChaChaDRG
    -- * Deterministic Random class
    , drgNew
    , drgNewTest
    , withDRG
    , DRG(..)
    -- * Random abstraction
    , MonadRandom(..)
    , MonadPseudoRandom
    ) where

import Crypto.Random.Types
import Crypto.Random.ChaChaDRG
import Crypto.Random.Entropy
import Data.ByteArray (ScrubbedBytes)
import Crypto.Internal.Imports

-- | Create a new DRG from system entropy
drgNew :: IO ChaChaDRG
drgNew = initialize <$> (getEntropy 40 :: IO ScrubbedBytes)

-- | Create a new DRG from 5 Word64.
--
-- This is a convenient interface to create deterministic interface
-- for quickcheck style testing.
--
-- It can also be used in other contexts provided the input
-- has been properly randomly generated.
drgNewTest :: (Word64, Word64, Word64, Word64, Word64) -> ChaChaDRG
drgNewTest = initializeWords