1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
|
-- |
-- 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 Data.Word (Word8)
import Foreign.Ptr
-- | 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 ()
|
