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{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE ForeignFunctionInterface #-}
{-# LANGUAGE TypeFamilies #-}
-- |
-- Module : Crypto.Hash.SHA224
-- License : BSD-style
-- Maintainer : Vincent Hanquez <vincent@snarc.org>
-- Stability : experimental
-- Portability : unknown
--
-- Module containing the binding functions to work with the
-- SHA224 cryptographic hash.
module Crypto.Hash.SHA224 (SHA224 (..)) where
import Crypto.Hash.Types
import Data.Data
import Data.Word (Word32, Word8)
import Foreign.Ptr (Ptr)
-- | SHA224 cryptographic hash algorithm
data SHA224 = SHA224
deriving (Show, Data)
instance HashAlgorithm SHA224 where
type HashBlockSize SHA224 = 64
type HashDigestSize SHA224 = 28
type HashInternalContextSize SHA224 = 192
hashBlockSize _ = 64
hashDigestSize _ = 28
hashInternalContextSize _ = 192
hashInternalInit = c_sha224_init
hashInternalUpdate = c_sha224_update
hashInternalFinalize = c_sha224_finalize
instance HashAlgorithmPrefix SHA224 where
hashInternalFinalizePrefix = c_sha224_finalize_prefix
foreign import ccall unsafe "crypton_sha224_init"
c_sha224_init :: Ptr (Context a) -> IO ()
foreign import ccall "crypton_sha224_update"
c_sha224_update :: Ptr (Context a) -> Ptr Word8 -> Word32 -> IO ()
foreign import ccall unsafe "crypton_sha224_finalize"
c_sha224_finalize :: Ptr (Context a) -> Ptr (Digest a) -> IO ()
foreign import ccall "crypton_sha224_finalize_prefix"
c_sha224_finalize_prefix
:: Ptr (Context a) -> Ptr Word8 -> Word32 -> Word32 -> Ptr (Digest a) -> IO ()
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