52 lines
1.4 KiB
Haskell
52 lines
1.4 KiB
Haskell
-- |
|
|
-- Module : Crypto.Internal.ByteArray
|
|
-- License : BSD-style
|
|
-- Maintainer : Vincent Hanquez <vincent@snarc.org>
|
|
-- Stability : stable
|
|
-- Portability : Good
|
|
--
|
|
-- Simple and efficient byte array types
|
|
--
|
|
{-# LANGUAGE BangPatterns #-}
|
|
{-# LANGUAGE MagicHash #-}
|
|
{-# LANGUAGE UnboxedTuples #-}
|
|
module Crypto.Internal.ByteArray
|
|
( ByteArray(..)
|
|
, byteArrayAllocAndFreeze
|
|
) where
|
|
|
|
import Data.SecureMem
|
|
import Crypto.Internal.Memory
|
|
import Crypto.Internal.Compat
|
|
import Foreign.Ptr
|
|
import Foreign.ForeignPtr
|
|
|
|
import Data.ByteString (ByteString)
|
|
import qualified Data.ByteString as B (length)
|
|
import qualified Data.ByteString.Internal as B
|
|
|
|
class ByteArray ba where
|
|
byteArrayAlloc :: Int -> (Ptr p -> IO ()) -> IO ba
|
|
byteArrayLength :: ba -> Int
|
|
|
|
instance ByteArray Bytes where
|
|
byteArrayAlloc = bytesAlloc
|
|
byteArrayLength = bytesLength
|
|
|
|
instance ByteArray ByteString where
|
|
byteArrayAlloc sz f = do
|
|
fptr <- B.mallocByteString sz
|
|
withForeignPtr fptr (f . castPtr)
|
|
return $! B.PS fptr 0 sz
|
|
byteArrayLength = B.length
|
|
|
|
instance ByteArray SecureMem where
|
|
byteArrayAlloc sz f = do
|
|
out <- allocateSecureMem sz
|
|
withSecureMemPtr out (f . castPtr)
|
|
return out
|
|
byteArrayLength = secureMemGetSize
|
|
|
|
byteArrayAllocAndFreeze :: ByteArray a => Int -> (Ptr p -> IO ()) -> a
|
|
byteArrayAllocAndFreeze sz f = unsafeDoIO (byteArrayAlloc sz f)
|