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120 lines
3.9 KiB
C
120 lines
3.9 KiB
C
/*
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* Copyright (c) 2020 Bouffalolab.
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*
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* This file is part of
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* *** Bouffalolab Software Dev Kit ***
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* (see www.bouffalolab.com).
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of Bouffalo Lab nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _IOTX_COMMON_SHA256_H_
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#define _IOTX_COMMON_SHA256_H_
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#include <stdint.h>
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#define SHA256_DIGEST_LENGTH (32)
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#define SHA256_BLOCK_LENGTH (64)
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#define SHA256_SHORT_BLOCK_LENGTH (SHA256_BLOCK_LENGTH - 8)
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#define SHA256_DIGEST_STRING_LENGTH (SHA256_DIGEST_LENGTH * 2 + 1)
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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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} iot_sha256_context;
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typedef union {
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char sptr[8];
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uint64_t lint;
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} u_retLen;
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/**
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* \brief Initialize SHA-256 context
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*
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* \param ctx SHA-256 context to be initialized
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*/
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void utils_sha256_init(iot_sha256_context *ctx);
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/**
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* \brief Clear SHA-256 context
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*
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* \param ctx SHA-256 context to be cleared
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*/
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void utils_sha256_free(iot_sha256_context *ctx);
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/**
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* \brief Clone (the state of) a SHA-256 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 utils_sha256_clone(iot_sha256_context *dst,
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const iot_sha256_context *src);
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/**
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* \brief SHA-256 context setup
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*
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* \param ctx context to be initialized
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*/
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void utils_sha256_starts(iot_sha256_context *ctx);
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/**
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* \brief SHA-256 process buffer
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*
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* \param ctx SHA-256 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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void utils_sha256_update(iot_sha256_context *ctx, const unsigned char *input, uint32_t ilen);
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/**
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* \brief SHA-256 final digest
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*
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* \param ctx SHA-256 context
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* \param output SHA-256 checksum result
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*/
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void utils_sha256_finish(iot_sha256_context *ctx, uint8_t output[32]);
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/* Internal use */
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void utils_sha256_process(iot_sha256_context *ctx, const unsigned char data[64]);
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/**
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* \brief Output = SHA-256( input buffer )
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*
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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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* \param output SHA-256 checksum result
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*/
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void utils_sha256(const uint8_t *input, uint32_t ilen, uint8_t output[32]);
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#endif
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