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{-# LANGUAGE CApiFFI #-}
{-# OPTIONS_GHC -Wno-missing-methods #-}
module Data.Digest.Md5
( md5
) where
import Data.ByteString.Lazy (ByteString)
import Foreign (Ptr, Storable(alignment, sizeOf))
import Foreign.C.Types
import Data.Digest.Internal
#include <openssl/md5.h>
data Md5Ctx
instance Storable Md5Ctx where
sizeOf _ = #size MD5_CTX
alignment _ = #alignment MD5_CTX
foreign import capi "openssl/md5.h value MD5_DIGEST_LENGTH"
md5DigestLength :: CSize
foreign import ccall "openssl/md5.h MD5_Init"
md5Init :: Ptr Md5Ctx -> IO CInt
foreign import ccall "openssl/md5.h MD5_Update"
md5Update :: Ptr Md5Ctx -> Ptr a -> CSize -> IO CInt
foreign import ccall "openssl/md5.h MD5_Final"
md5Final :: Ptr CUChar -> Ptr Md5Ctx -> IO CInt
md5Algo :: Algo
md5Algo = Algo md5DigestLength md5Init md5Update md5Final
md5 :: ByteString -> Digest
md5 = hash md5Algo
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