esp-idf/components/mbedtls/port/include/sha1_alt.h

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/*
* SHA-1 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.
*
*/
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#ifndef _SHA1_ALT_H_
#define _SHA1_ALT_H_
#ifdef __cplusplus
extern "C" {
#endif
#if defined(MBEDTLS_SHA1_ALT)
typedef enum {
ESP_MBEDTLS_SHA1_UNUSED, /* first block hasn't been processed yet */
ESP_MBEDTLS_SHA1_HARDWARE, /* using hardware SHA engine */
ESP_MBEDTLS_SHA1_SOFTWARE, /* using software SHA */
} esp_mbedtls_sha1_mode;
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/**
* \brief SHA-1 context structure
*/
typedef struct
{
uint32_t total[2]; /*!< number of bytes processed */
uint32_t state[5]; /*!< intermediate digest state */
unsigned char buffer[64]; /*!< data block being processed */
esp_mbedtls_sha1_mode mode;
}
mbedtls_sha1_context;
/**
* \brief Initialize SHA-1 context
*
* \param ctx SHA-1 context to be initialized
*/
void mbedtls_sha1_init( mbedtls_sha1_context *ctx );
/**
* \brief Clear SHA-1 context
*
* \param ctx SHA-1 context to be cleared
*/
void mbedtls_sha1_free( mbedtls_sha1_context *ctx );
/**
* \brief Clone (the state of) a SHA-1 context
*
* \param dst The destination context
* \param src The context to be cloned
*/
void mbedtls_sha1_clone( mbedtls_sha1_context *dst,
const mbedtls_sha1_context *src );
/**
* \brief SHA-1 context setup
*
* \param ctx context to be initialized
*/
void mbedtls_sha1_starts( mbedtls_sha1_context *ctx );
/**
* \brief SHA-1 process buffer
*
* \param ctx SHA-1 context
* \param input buffer holding the data
* \param ilen length of the input data
*/
void mbedtls_sha1_update( mbedtls_sha1_context *ctx, const unsigned char *input, size_t ilen );
/**
* \brief SHA-1 final digest
*
* \param ctx SHA-1 context
* \param output SHA-1 checksum result
*/
void mbedtls_sha1_finish( mbedtls_sha1_context *ctx, unsigned char output[20] );
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/* Internal use */
void mbedtls_sha1_process( mbedtls_sha1_context *ctx, const unsigned char data[64] );
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#endif
#ifdef __cplusplus
}
#endif
#endif