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-- Copyright 2018 Google LLC
--
-- Licensed under the Apache License, Version 2.0 (the "License"); you may not
-- use this file except in compliance with the License. You may obtain a copy of
-- the License at
--
-- https://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-- WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-- License for the specific language governing permissions and limitations under
-- the License.
{-# OPTIONS_GHC -Wno-missing-methods #-}
{-# OPTIONS_GHC -Wno-orphans #-}
module Internal.Digest
( evpMD5, evpSHA1, evpSHA224, evpSHA256, evpSHA384, evpSHA512
, mallocEVPMDCtx
, evpDigestInitEx, evpDigestUpdate, evpDigestFinalEx
, evpMaxMDSize
) where
import Foreign
(FinalizerPtr, ForeignPtr, Ptr, Storable(alignment, sizeOf),
addForeignPtrFinalizer, mallocForeignPtr, withForeignPtr)
import Foreign.C.Types
import Foreign.Ptr.Cast (asVoidPtr)
import Foreign.Ptr.CreateWithFinalizer (createWithFinalizer)
{#import Internal.Base#}
import Result
#include <openssl/digest.h>
evpMD5, evpSHA1, evpSHA224, evpSHA256, evpSHA384, evpSHA512 :: Ptr EVPMD
evpMD5 = {#call pure EVP_md5 as ^#}
evpSHA1 = {#call pure EVP_sha1 as ^#}
evpSHA224 = {#call pure EVP_sha224 as ^#}
evpSHA256 = {#call pure EVP_sha256 as ^#}
evpSHA384 = {#call pure EVP_sha384 as ^#}
evpSHA512 = {#call pure EVP_sha512 as ^#}
-- | Memory-safe allocator for 'EVPMDCtx'.
mallocEVPMDCtx :: IO (ForeignPtr EVPMDCtx)
mallocEVPMDCtx =
createWithFinalizer {#call EVP_MD_CTX_init as ^#} btlsFinalizeEVPMDCtxPtr
foreign import ccall "&btlsFinalizeEVPMDCtx"
btlsFinalizeEVPMDCtxPtr :: FinalizerPtr EVPMDCtx
evpDigestInitEx :: Ptr EVPMDCtx -> Ptr EVPMD -> Ptr Engine -> IO ()
evpDigestInitEx ctx md engine =
requireSuccess $ {#call EVP_DigestInit_ex as ^#} ctx md engine
evpDigestUpdate :: Ptr EVPMDCtx -> Ptr a -> CULong -> IO ()
evpDigestUpdate ctx md bytes =
alwaysSucceeds $ {#call EVP_DigestUpdate as ^#} ctx (asVoidPtr md) bytes
evpDigestFinalEx :: Ptr EVPMDCtx -> Ptr CUChar -> Ptr CUInt -> IO ()
evpDigestFinalEx ctx mdOut outSize =
alwaysSucceeds $ {#call EVP_DigestFinal_ex as ^#} ctx mdOut outSize
evpMaxMDSize :: Int
evpMaxMDSize = {#const EVP_MAX_MD_SIZE#}
instance Storable EVPMDCtx where
sizeOf _ = {#sizeof EVP_MD_CTX#}
alignment _ = {#alignof EVP_MD_CTX#}
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