esp-idf/components/mbedtls/port/include/sha256_alt.h

80 wiersze
2.3 KiB
C

/*
* SHA-256 implementation with hardware ESP32 support added.
* Uses mbedTLS software implementation for failover when concurrent
* SHA operations are in use.
*
* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
* Additions Copyright (C) 2016, Espressif Systems (Shanghai) PTE LTD
* 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.
*
*/
#ifndef _SHA256_ALT_H_
#define _SHA256_ALT_H_
#if defined(MBEDTLS_SHA256_ALT)
#include "hal/sha_types.h"
#include "soc/soc_caps.h"
#ifdef __cplusplus
extern "C" {
#endif
#if SOC_SHA_SUPPORT_PARALLEL_ENG
typedef enum {
ESP_MBEDTLS_SHA256_UNUSED, /* first block hasn't been processed yet */
ESP_MBEDTLS_SHA256_HARDWARE, /* using hardware SHA engine */
ESP_MBEDTLS_SHA256_SOFTWARE, /* using software SHA */
} esp_mbedtls_sha256_mode;
/**
* \brief SHA-256 context structure
*/
typedef struct {
uint32_t total[2]; /*!< number of bytes processed */
uint32_t state[8]; /*!< intermediate digest state */
unsigned char buffer[64]; /*!< data block being processed */
int is224; /*!< 0 => SHA-256, else SHA-224 */
esp_mbedtls_sha256_mode mode;
} mbedtls_sha256_context;
#elif SOC_SHA_SUPPORT_DMA
typedef enum {
ESP_SHA256_STATE_INIT,
ESP_SHA256_STATE_IN_PROCESS
} esp_sha256_state;
/**
* \brief SHA-256 context structure
*/
typedef struct {
uint32_t total[2]; /*!< number of bytes processed */
uint32_t state[8]; /*!< intermediate digest state */
unsigned char buffer[64]; /*!< data block being processed */
int first_block; /*!< if first then true, else false */
esp_sha_type mode;
esp_sha256_state sha_state;
} mbedtls_sha256_context;
#endif
#endif
#ifdef __cplusplus
}
#endif
#endif