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80 lines
2.3 KiB
C
80 lines
2.3 KiB
C
/*
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* SHA-256 implementation with hardware ESP32 support added.
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* Uses mbedTLS software implementation for failover when concurrent
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* SHA operations are in use.
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*
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* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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* Additions Copyright (C) 2016, Espressif Systems (Shanghai) PTE LTD
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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#ifndef _SHA256_ALT_H_
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#define _SHA256_ALT_H_
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#if defined(MBEDTLS_SHA256_ALT)
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#include "hal/sha_types.h"
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#include "soc/soc_caps.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if SOC_SHA_SUPPORT_PARALLEL_ENG
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typedef enum {
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ESP_MBEDTLS_SHA256_UNUSED, /* first block hasn't been processed yet */
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ESP_MBEDTLS_SHA256_HARDWARE, /* using hardware SHA engine */
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ESP_MBEDTLS_SHA256_SOFTWARE, /* using software SHA */
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} esp_mbedtls_sha256_mode;
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/**
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* \brief SHA-256 context structure
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*/
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typedef struct {
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uint32_t total[2]; /*!< number of bytes processed */
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uint32_t state[8]; /*!< intermediate digest state */
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unsigned char buffer[64]; /*!< data block being processed */
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int is224; /*!< 0 => SHA-256, else SHA-224 */
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esp_mbedtls_sha256_mode mode;
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} mbedtls_sha256_context;
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#elif SOC_SHA_SUPPORT_DMA
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typedef enum {
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ESP_SHA256_STATE_INIT,
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ESP_SHA256_STATE_IN_PROCESS
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} esp_sha256_state;
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/**
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* \brief SHA-256 context structure
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*/
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typedef struct {
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uint32_t total[2]; /*!< number of bytes processed */
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uint32_t state[8]; /*!< intermediate digest state */
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unsigned char buffer[64]; /*!< data block being processed */
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int first_block; /*!< if first then true, else false */
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esp_sha_type mode;
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esp_sha256_state sha_state;
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} mbedtls_sha256_context;
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#endif
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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