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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2010-2020. All Rights Reserved.
*
* 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
*
* http://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.
*
* %CopyrightEnd%
*/
#include "common.h"
/*****************************************************************
*
* This file has functions for compatibility with cryptolibs
* lacking the EVP_Digest API.
*
* See mac.c for the implementation using the EVP interface.
*
****************************************************************/
#if defined(HAVE_CMAC) && !defined(HAVE_EVP_PKEY_new_CMAC_key)
#include "cmac.h"
int cmac_low_level(ErlNifEnv* env,
ErlNifBinary key_bin, const EVP_CIPHER* cipher, ErlNifBinary text,
ErlNifBinary *ret_bin, int *ret_bin_alloc, ERL_NIF_TERM *return_term)
{
CMAC_CTX *ctx = NULL;
size_t size;
if ((ctx = CMAC_CTX_new()) == NULL)
goto local_err;
if (!CMAC_Init(ctx, key_bin.data, key_bin.size, cipher, NULL))
goto local_err;
if (!CMAC_Update(ctx, text.data, text.size))
goto local_err;
if ((size = (size_t)EVP_CIPHER_block_size(cipher)) < 0)
goto local_err;
if (!enif_alloc_binary(size, ret_bin))
goto local_err;
*ret_bin_alloc = 1;
if (!CMAC_Final(ctx, ret_bin->data, &ret_bin->size))
goto local_err;
CMAC_CTX_free(ctx);
return 1;
local_err:
if (ctx)
CMAC_CTX_free(ctx);
*return_term = EXCP_ERROR(env,"Compat cmac");
return 0;
}
#endif
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