/** * \file sha256.h * * \brief This file contains SHA-224 and SHA-256 definitions and functions. * * The Secure Hash Algorithms 224 and 256 (SHA-224 and SHA-256) cryptographic * hash functions are defined in <em>FIPS 180-4: Secure Hash Standard (SHS)</em>. */ /* * Copyright (C) 2006-2018, Arm Limited (or its affiliates), All Rights Reserved * Copyright (C) 2019-2020, STMicroelectronics, All Rights Reserved * SPDX-License-Identifier: Apache-2.0 * * 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. * * This file implements STMicroelectronics SHA256 API with HW services based * on mbed TLS API */ #ifndef MBEDTLS_SHA256_ALT_H #define MBEDTLS_SHA256_ALT_H #if defined (MBEDTLS_SHA256_ALT) /* Includes ------------------------------------------------------------------*/ #include "hash_stm32.h" #define ST_SHA256_BLOCK_SIZE ((size_t) 64) /*!< HW handles 512 bits, ie 64 bytes */ #define ST_SHA256_NB_HASH_REG ((uint32_t)57) /*!< Number of HASH HW context Registers: CR + STR + IMR + CSR[54] */ /** * \brief SHA-256 context structure * * The structure is used both for SHA-256 and for SHA-224 * checksum calculations. The choice between these two is * made in the call to mbedtls_sha256_starts_ret(). */ typedef struct mbedtls_sha256_context { int is224; /*!< 0 = use SHA256, 1 = use SHA224 */ HASH_HandleTypeDef hhash; /*!< Handle of HASH HAL */ uint8_t sbuf[ST_SHA256_BLOCK_SIZE]; /*!< Buffer to store input data until ST_SHA256_BLOCK_SIZE is reached, or until last input data is reached */ uint8_t sbuf_len; /*!< Number of bytes stored in sbuf */ uint32_t ctx_save_regs[ST_SHA256_NB_HASH_REG]; } mbedtls_sha256_context; #endif /* MBEDTLS_SHA256_ALT */ #endif /* MBEDTLS_SHA256_ALT_H */