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Diffstat (limited to 'src/BTLS/BoringSSL/HMAC.chs')
-rw-r--r-- | src/BTLS/BoringSSL/HMAC.chs | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/src/BTLS/BoringSSL/HMAC.chs b/src/BTLS/BoringSSL/HMAC.chs new file mode 100644 index 0000000..5c53122 --- /dev/null +++ b/src/BTLS/BoringSSL/HMAC.chs @@ -0,0 +1,54 @@ +-- 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 #-} + +module BTLS.BoringSSL.HMAC + ( mallocHMACCtx + , hmacInitEx, hmacUpdate, hmacFinal + ) where + +import Foreign (FinalizerPtr, ForeignPtr, Ptr, Storable(alignment, sizeOf)) +import Foreign.C.Types + +{#import BTLS.BoringSSL.Base#} +import BTLS.Cast (asVoidPtr) +import BTLS.CreateWithFinalizer (createWithFinalizer) +import BTLS.Result + +#include <openssl/hmac.h> + +-- | Memory-safe allocator for 'HMACCtx'. +mallocHMACCtx :: IO (ForeignPtr HMACCtx) +mallocHMACCtx = createWithFinalizer {#call HMAC_CTX_init as ^#} hmacCtxCleanup + +foreign import ccall "&HMAC_CTX_cleanup" + hmacCtxCleanup :: FinalizerPtr HMACCtx + +hmacInitEx :: Ptr HMACCtx -> Ptr a -> CULong -> Ptr EVPMD -> Ptr Engine -> IO () +hmacInitEx ctx bytes size md engine = + requireSuccess $ + {#call HMAC_Init_ex as ^#} ctx (asVoidPtr bytes) size md engine + +hmacUpdate :: Ptr HMACCtx -> Ptr CUChar -> CULong -> IO () +hmacUpdate ctx bytes size = + alwaysSucceeds $ {#call HMAC_Update as ^#} ctx bytes size + +hmacFinal :: Ptr HMACCtx -> Ptr CUChar -> Ptr CUInt -> IO () +hmacFinal ctx out outSize = + requireSuccess $ {#call HMAC_Final as ^#} ctx out outSize + +instance Storable HMACCtx where + sizeOf _ = {#sizeof HMAC_CTX#} + alignment _ = {#alignof HMAC_CTX#} |