86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
/*
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* Copyright (C) 2015-2018 Alibaba Group Holding Limited
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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 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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void utils_hmac_sha256(const uint8_t *msg, uint32_t msg_len, const uint8_t *key, uint32_t key_len, uint8_t output[32]);
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#endif
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