79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
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#ifndef UTILS_SHA1_H_
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#define UTILS_SHA1_H_
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#include "stdio.h"
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#include "stdint.h"
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#include "stdlib.h"
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#include "string.h"
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/**
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* \brief SHA-1 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[5]; /*!< intermediate digest state */
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unsigned char buffer[64]; /*!< data block being processed */
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} iot_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 utils_sha1_init(iot_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 utils_sha1_free(iot_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 utils_sha1_clone(iot_sha1_context *dst,
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const iot_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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void utils_sha1_starts(iot_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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void utils_sha1_update(iot_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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void utils_sha1_finish(iot_sha1_context *ctx, unsigned char output[20]);
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/* Internal use */
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void utils_sha1_process(iot_sha1_context *ctx, const unsigned char data[64]);
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/**
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* \brief Output = SHA-1( 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-1 checksum result
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*/
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void utils_sha1(const unsigned char *input, size_t ilen, unsigned char output[20]);
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#endif
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