mirror of https://github.com/ARMmbed/mbed-os.git
130 lines
3.7 KiB
C
130 lines
3.7 KiB
C
/*
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* \file sha1_alt.h
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*
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* \brief SHA1 hw acceleration (hash function)
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*
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* Copyright (C) 2017, STMicroelectronics
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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 MBEDTLS_SHA1_ALT_H
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#define MBEDTLS_SHA1_ALT_H
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#if defined (MBEDTLS_SHA1_ALT)
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/**
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* \name SECTION: Temporary compatibility code
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*
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* This section contains code to be added up stream in Mbed TLS. Once that
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* has been provided, this section should be removed as the code will be
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* provided elsewhere.
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* \{
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*/
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#define MBEDTLS_ERR_SHA1_HW_ACCEL_FAILED -0x0035 /**< SHA-1 hardware accelerator failed */
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/* \} name SECTION: Temporary compatibility code */
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#include "cmsis.h"
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#include <string.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define ST_SHA1_BLOCK_SIZE ((size_t) 64) // HW handles 512 bits, ie 64 bytes
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#define ST_SHA1_TIMEOUT ((uint32_t) 3)
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/**
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* \brief SHA-1 context structure
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* \note HAL_HASH_SHA1_Accumulate will accumulate 512 bits packets, unless it is the last call to the function
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* A ST_SHA1_BLOCK_SIZE bytes buffer is used to save values and handle the processing
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* multiples of ST_SHA1_BLOCK_SIZE bytes
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* If SHA1_finish is called and sbuf_len>0, the remaining bytes are accumulated prior to the call to HAL_HASH_SHA1_Finish
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*/
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typedef struct
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{
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unsigned char sbuf[ST_SHA1_BLOCK_SIZE]; /*!< MBEDTLS_SHA1_BLOCK_SIZE buffer to store values so that algorithm is caled once the buffer is filled */
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unsigned char sbuf_len; /*!< number of bytes remaining in sbuf to be processed */
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HASH_HandleTypeDef hhash_sha1; /*!< ST HAL HASH struct */
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uint32_t ctx_save_cr;
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uint32_t ctx_save_str;
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uint32_t ctx_save_csr[38];
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}
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mbedtls_sha1_context;
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/**
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* \brief Initialize SHA-1 context
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*
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* \param ctx SHA-1 context to be initialized
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*/
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void mbedtls_sha1_init( mbedtls_sha1_context *ctx );
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/**
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* \brief Clear SHA-1 context
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*
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* \param ctx SHA-1 context to be cleared
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*/
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void mbedtls_sha1_free( mbedtls_sha1_context *ctx );
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/**
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* \brief Clone (the state of) a SHA-1 context
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*
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* \param dst The destination context
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* \param src The context to be cloned
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*/
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void mbedtls_sha1_clone( mbedtls_sha1_context *dst,
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const mbedtls_sha1_context *src );
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/**
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* \brief SHA-1 context setup
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*
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* \param ctx context to be initialized
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*
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* \return 0 if successful
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*/
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int mbedtls_sha1_starts_ret( mbedtls_sha1_context *ctx );
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/**
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* \brief SHA-1 process buffer
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*
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* \param ctx SHA-1 context
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* \param input buffer holding the data
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* \param ilen length of the input data
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*
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* \return 0 if successful
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*/
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int mbedtls_sha1_update_ret( mbedtls_sha1_context *ctx, const unsigned char *input, size_t ilen );
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/**
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* \brief SHA-1 final digest
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*
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* \param ctx SHA-1 context
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* \param output SHA-1 checksum result
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*
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* \return 0 if successful
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*/
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int mbedtls_sha1_finish_ret( mbedtls_sha1_context *ctx, unsigned char output[20] );
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/* Internal use */
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int mbedtls_sha1_process( mbedtls_sha1_context *ctx, const unsigned char data[ST_SHA1_BLOCK_SIZE] );
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#ifdef __cplusplus
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}
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#endif
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#endif /* MBEDTLS_SHA1_ALT */
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#endif /* sha1_alt.h */
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