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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 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 = do
fp <- mallocForeignPtr
withForeignPtr fp {#call EVP_MD_CTX_init as ^#}
addForeignPtrFinalizer btlsFinalizeEvpMdCtxPtr fp
return fp
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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