Safe Haskell	None
Language	Haskell2010

Crypto.RNG

Contents

CryproRNG class
Generation of strings and numbers
Generation of values in other types
Monad transformer for carrying rng state

Description

Support for generation of cryptographically secure random numbers, based on the DRBG package.

This is a convenience layer on top of DRBG, which allows you to pull random values by means of the method random, while keeping the state of the random number generator (RNG) inside a monad. The state is protected by an MVar, which means that concurrent generation of random values from several threads works straight out of the box.

The access to the RNG state is captured by a class. By making instances of this class, client code can enjoy RNG generation from their own monads.

Synopsis

CryproRNG class

module Crypto.RNG.Class

Generation of strings and numbers

data CryptoRNGState Source #

The random number generator state. It sits inside an MVar to support concurrent thread access.

newCryptoRNGState :: MonadIO m => m CryptoRNGState Source #

Create a new CryptoRNGState, based on system entropy.

unsafeCryptoRNGState :: MonadIO m => ByteString -> m CryptoRNGState Source #

Create a new CryptoRNGState, based on a bytestring seed. Should only be used for testing.

randomBytesIO Source #

Arguments

:: ByteLength	number of bytes to generate
-> CryptoRNGState
-> IO ByteString

Generate given number of cryptographically secure random bytes.

randomR :: (CryptoRNG m, Integral a) => (a, a) -> m a Source #

Generate a cryptographically secure random number in given, closed range.

Generation of values in other types

class Random a where Source #

Class for generating cryptographically secure random values.

Minimal complete definition

random

Methods

random :: CryptoRNG m => m a Source #

Instances

Random Int Source #
Methods random :: CryptoRNG m => m Int Source #
Random Int16 Source #
Methods random :: CryptoRNG m => m Int16 Source #
Random Int32 Source #
Methods random :: CryptoRNG m => m Int32 Source #
Random Int64 Source #
Methods random :: CryptoRNG m => m Int64 Source #
Random Word Source #
Methods random :: CryptoRNG m => m Word Source #
Random Word8 Source #
Methods random :: CryptoRNG m => m Word8 Source #
Random Word16 Source #
Methods random :: CryptoRNG m => m Word16 Source #
Random Word32 Source #
Methods random :: CryptoRNG m => m Word32 Source #
Random Word64 Source #
Methods random :: CryptoRNG m => m Word64 Source #

boundedIntegralRandom :: forall m a. (CryptoRNG m, Integral a, Bounded a) => m a Source #

Helper function for making Random instances.

Monad transformer for carrying rng state

data CryptoRNGT m a Source #

Monad transformer with RNG state.

Instances

MonadTrans CryptoRNGT Source #
Methods lift :: Monad m => m a -> CryptoRNGT m a #
MonadTransControl CryptoRNGT Source #
Associated Types type StT (CryptoRNGT :: (* -> ) -> -> ) a :: # Methods liftWith :: Monad m => (Run CryptoRNGT -> m a) -> CryptoRNGT m a # restoreT :: Monad m => m (StT CryptoRNGT a) -> CryptoRNGT m a #
MonadBase b m => MonadBase b (CryptoRNGT m) Source #
Methods liftBase :: b α -> CryptoRNGT m α #
MonadBaseControl b m => MonadBaseControl b (CryptoRNGT m) Source #
Associated Types type StM (CryptoRNGT m :: * -> ) a :: # Methods liftBaseWith :: (RunInBase (CryptoRNGT m) b -> b a) -> CryptoRNGT m a # restoreM :: StM (CryptoRNGT m) a -> CryptoRNGT m a #
Monad m => Monad (CryptoRNGT m) Source #
Methods (>>=) :: CryptoRNGT m a -> (a -> CryptoRNGT m b) -> CryptoRNGT m b # (>>) :: CryptoRNGT m a -> CryptoRNGT m b -> CryptoRNGT m b # return :: a -> CryptoRNGT m a # fail :: String -> CryptoRNGT m a #
Functor m => Functor (CryptoRNGT m) Source #
Methods fmap :: (a -> b) -> CryptoRNGT m a -> CryptoRNGT m b # (<$) :: a -> CryptoRNGT m b -> CryptoRNGT m a #
Applicative m => Applicative (CryptoRNGT m) Source #
Methods pure :: a -> CryptoRNGT m a # (<>) :: CryptoRNGT m (a -> b) -> CryptoRNGT m a -> CryptoRNGT m b # (>) :: CryptoRNGT m a -> CryptoRNGT m b -> CryptoRNGT m b # (<*) :: CryptoRNGT m a -> CryptoRNGT m b -> CryptoRNGT m a #
MonadIO m => MonadIO (CryptoRNGT m) Source #
Methods liftIO :: IO a -> CryptoRNGT m a #
Alternative m => Alternative (CryptoRNGT m) Source #
Methods empty :: CryptoRNGT m a # (<\|>) :: CryptoRNGT m a -> CryptoRNGT m a -> CryptoRNGT m a # some :: CryptoRNGT m a -> CryptoRNGT m [a] # many :: CryptoRNGT m a -> CryptoRNGT m [a] #
MonadPlus m => MonadPlus (CryptoRNGT m) Source #
Methods mzero :: CryptoRNGT m a # mplus :: CryptoRNGT m a -> CryptoRNGT m a -> CryptoRNGT m a #
MonadThrow m => MonadThrow (CryptoRNGT m) Source #
Methods throwM :: Exception e => e -> CryptoRNGT m a #
MonadCatch m => MonadCatch (CryptoRNGT m) Source #
Methods catch :: Exception e => CryptoRNGT m a -> (e -> CryptoRNGT m a) -> CryptoRNGT m a #
MonadMask m => MonadMask (CryptoRNGT m) Source #
Methods mask :: ((forall a. CryptoRNGT m a -> CryptoRNGT m a) -> CryptoRNGT m b) -> CryptoRNGT m b # uninterruptibleMask :: ((forall a. CryptoRNGT m a -> CryptoRNGT m a) -> CryptoRNGT m b) -> CryptoRNGT m b #
MonadIO m => CryptoRNG (CryptoRNGT m) Source #
Methods randomBytes :: ByteLength -> CryptoRNGT m ByteString Source #
type StT CryptoRNGT a Source #
type StT CryptoRNGT a
type StM (CryptoRNGT m) a Source #
type StM (CryptoRNGT m) a = ComposeSt CryptoRNGT m a

mapCryptoRNGT :: (m a -> n b) -> CryptoRNGT m a -> CryptoRNGT n b Source #

runCryptoRNGT :: CryptoRNGState -> CryptoRNGT m a -> m a Source #

withCryptoRNGState :: (CryptoRNGState -> m a) -> CryptoRNGT m a Source #