sha256_alt.c

00001 /*
00002  *  sha256_alt.c
00003  *
00004  *  Copyright (C) 2018, Arm Limited, All Rights Reserved
00005  *  SPDX-License-Identifier: Apache-2.0
00006  *
00007  *  Licensed under the Apache License, Version 2.0 (the "License"); you may
00008  *  not use this file except in compliance with the License.
00009  *  You may obtain a copy of the License at
00010  *
00011  *  http://www.apache.org/licenses/LICENSE-2.0
00012  *
00013  *  Unless required by applicable law or agreed to in writing, software
00014  *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
00015  *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00016  *  See the License for the specific language governing permissions and
00017  *  limitations under the License.
00018  *
00019  */
00020 
00021 #include "mbedtls/sha256.h"
00022 #if defined(MBEDTLS_SHA256_ALT)
00023 #include <string.h>
00024 #include "mbedtls/platform.h"
00025 
00026 void mbedtls_sha256_init( mbedtls_sha256_context *ctx )
00027 {
00028     memset( ctx, 0, sizeof( mbedtls_sha256_context ) );
00029 }
00030 
00031 void mbedtls_sha256_free( mbedtls_sha256_context *ctx )
00032 {
00033     if( ctx == NULL )
00034         return;
00035     CRYS_HASH_Free( &ctx->crys_hash_ctx );
00036     memset( ctx, 0, sizeof( mbedtls_sha256_context ) );
00037 }
00038 
00039 void mbedtls_sha256_clone( mbedtls_sha256_context *dst,
00040                            const mbedtls_sha256_context *src )
00041 {
00042     memcpy( dst, src, sizeof( mbedtls_sha256_context ) );
00043 }
00044 
00045 
00046 int mbedtls_sha256_starts_ret( mbedtls_sha256_context *ctx, int is224 )
00047 {
00048     if(CRYS_HASH_Init( &ctx->crys_hash_ctx, is224 ?
00049                     CRYS_HASH_SHA224_mode  : CRYS_HASH_SHA256_mode  ) != CRYS_OK )
00050         return ( MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED );
00051     return ( 0 );
00052 }
00053 
00054 int mbedtls_internal_sha256_process( mbedtls_sha256_context *ctx,
00055                                      const unsigned char data[64] )
00056 {
00057     return( MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED );
00058 }
00059 
00060 int mbedtls_sha256_update_ret( mbedtls_sha256_context *ctx,
00061                                const unsigned char *input,
00062                                size_t ilen )
00063 {
00064     if( CRYS_HASH_Update( &ctx->crys_hash_ctx, (uint8_t*)input, ilen ) != CRYS_OK )
00065         return ( MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED );
00066     return ( 0 );
00067 }
00068 
00069 int mbedtls_sha256_finish_ret( mbedtls_sha256_context *ctx,
00070                                unsigned char output[32] )
00071 {
00072     CRYSError_t  crys_err = CRYS_OK;
00073     CRYS_HASH_Result_t  crys_result = {0};
00074     crys_err = CRYS_HASH_Finish( &ctx->crys_hash_ctx, crys_result );
00075     if( crys_err == CRYS_OK )
00076     {
00077         memcpy( output, crys_result, 32 );
00078         return ( 0 );
00079     }
00080     else
00081         return ( MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED );
00082 }
00083 #endif //MBEDTLS_SHA256_ALT
00084