    -- |
    -- Module      : Crypto.Hash.Blake2sp
    -- License     : BSD-style
    -- Maintainer  : Vincent Hanquez <vincent@snarc.org>
    -- Stability   : experimental
    -- Portability : unknown
    --
    -- module containing the binding functions to work with the
    -- Blake2sp cryptographic hash.
    --
    {-# LANGUAGE ForeignFunctionInterface #-}
    module Crypto.Hash.Blake2sp
        (  Blake2sp_256 (..)
        ) where

    import           Crypto.Hash.Types
    import           Foreign.Ptr (Ptr)
    import           Data.Word (Word8, Word32)

    -- | Blake2sp (256 bits) cryptographic hash algorithm
    data Blake2sp_256 = Blake2sp_256
        deriving (Show)

    instance HashAlgorithm Blake2sp_256 where
        hashBlockSize  _          = 64
        hashDigestSize _          = 32
        hashInternalContextSize _ = 2185
        hashInternalInit p        = c_blake2sp_init p 256
        hashInternalUpdate        = c_blake2sp_update
        hashInternalFinalize p    = c_blake2sp_finalize p 256

    foreign import ccall unsafe "cryptonite_blake2sp_init"
        c_blake2sp_init :: Ptr (Context a) -> Word32 -> IO ()

    foreign import ccall "cryptonite_blake2sp_update"
        c_blake2sp_update :: Ptr (Context a) -> Ptr Word8 -> Word32 -> IO ()

    foreign import ccall unsafe "cryptonite_blake2sp_finalize"
        c_blake2sp_finalize :: Ptr (Context a) -> Word32 -> Ptr (Digest a) -> IO ()