75 lines
2.6 KiB
Haskell
75 lines
2.6 KiB
Haskell
{-# LANGUAGE ForeignFunctionInterface #-}
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-- |
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-- Module : Crypto.Hash.RIPEMD160
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-- License : BSD-style
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-- Maintainer : Vincent Hanquez <vincent@snarc.org>
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-- Stability : experimental
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-- Portability : unknown
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--
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-- module containing the pure functions to work with the
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-- RIPEMD160 cryptographic hash.
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--
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-- it is recommended to import this module qualified.
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--
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module Crypto.Hash.RIPEMD160
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( Ctx(..)
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-- * Incremental hashing Functions
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, init -- :: Ctx
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, update -- :: Ctx -> ByteString -> Ctx
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, updates -- :: Ctx -> [ByteString] -> Ctx
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, finalize -- :: Ctx -> ByteString
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-- * Single Pass hashing
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, hash -- :: ByteString -> ByteString
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, hashlazy -- :: ByteString -> ByteString
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) where
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import Prelude hiding (init)
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import qualified Data.ByteString.Lazy as L
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import Data.ByteString (ByteString)
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import Crypto.Internal.Compat (unsafeDoIO)
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import Crypto.Hash.Internal.RIPEMD160
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{-# RULES "hash" forall b. finalize (update init b) = hash b #-}
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{-# RULES "hash.list1" forall b. finalize (updates init [b]) = hash b #-}
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{-# RULES "hashmany" forall b. finalize (foldl update init b) = hashlazy (L.fromChunks b) #-}
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{-# RULES "hashlazy" forall b. finalize (foldl update init $ L.toChunks b) = hashlazy b #-}
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{-# NOINLINE init #-}
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-- | init a context
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init :: Ctx
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init = unsafeDoIO internalInit
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{-# NOINLINE update #-}
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-- | update a context with a bytestring returning the new updated context
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update :: Ctx -- ^ the context to update
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-> ByteString -- ^ the data to update with
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-> Ctx -- ^ the updated context
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update ctx d = unsafeDoIO $ withCtxCopy ctx $ \ptr -> internalUpdate ptr d
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{-# NOINLINE updates #-}
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-- | updates a context with multiples bytestring returning the new updated context
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updates :: Ctx -- ^ the context to update
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-> [ByteString] -- ^ a list of data bytestring to update with
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-> Ctx -- ^ the updated context
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updates ctx d = unsafeDoIO $ withCtxCopy ctx $ \ptr -> mapM_ (internalUpdate ptr) d
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{-# NOINLINE finalize #-}
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-- | finalize the context into a digest bytestring
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finalize :: Ctx -> ByteString
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finalize ctx = unsafeDoIO $ withCtxThrow ctx internalFinalize
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{-# NOINLINE hash #-}
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-- | hash a strict bytestring into a digest bytestring
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hash :: ByteString -> ByteString
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hash d = unsafeDoIO $ withCtxNewThrow $ \ptr -> do
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internalInitAt ptr >> internalUpdate ptr d >> internalFinalize ptr
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{-# NOINLINE hashlazy #-}
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-- | hash a lazy bytestring into a digest bytestring
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hashlazy :: L.ByteString -> ByteString
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hashlazy l = unsafeDoIO $ withCtxNewThrow $ \ptr -> do
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internalInitAt ptr >> mapM_ (internalUpdate ptr) (L.toChunks l) >> internalFinalize ptr
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