137 lines
3.7 KiB
C
137 lines
3.7 KiB
C
#ifndef __OTA_MD5_H__
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#define __OTA_MD5_H__
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#if defined(__cplusplus)
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extern "C" {
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#endif
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <stddef.h>
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/**
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* \brief MD5 context structure
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*
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* \warning MD5 is considered a weak message digest and its use
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* constitutes a security risk. We recommend considering
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* stronger message digests instead.
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*
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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[4]; /*!< intermediate digest state */
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unsigned char buffer[64]; /*!< data block being processed */
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} utils_md5_context_t;
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/**
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* \brief Initialize MD5 context
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*
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* \param ctx MD5 context to be initialized
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*
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* \warning MD5 is considered a weak message digest and its use
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* constitutes a security risk. We recommend considering
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* stronger message digests instead.
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*
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*/
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void utils_md5_init(utils_md5_context_t *ctx);
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/**
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* \brief Clear MD5 context
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*
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* \param ctx MD5 context to be cleared
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*
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* \warning MD5 is considered a weak message digest and its use
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* constitutes a security risk. We recommend considering
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* stronger message digests instead.
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*
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*/
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void utils_md5_free(utils_md5_context_t *ctx);
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/**
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* \brief MD5 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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* \warning MD5 is considered a weak message digest and its use
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* constitutes a security risk. We recommend considering
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* stronger message digests instead.
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*
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*/
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int32_t utils_md5_starts(utils_md5_context_t *ctx);
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/**
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* \brief MD5 process buffer
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*
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* \param ctx MD5 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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* \warning MD5 is considered a weak message digest and its use
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* constitutes a security risk. We recommend considering
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* stronger message digests instead.
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*
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*/
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int32_t utils_md5_update(utils_md5_context_t *ctx,
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const unsigned char *input,
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uint32_t ilen);
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/**
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* \brief MD5 final digest
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*
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* \param ctx MD5 context
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* \param output MD5 checksum result
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*
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* \return 0 if successful
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*
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* \warning MD5 is considered a weak message digest and its use
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* constitutes a security risk. We recommend considering
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* stronger message digests instead.
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*
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*/
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int32_t utils_md5_finish(utils_md5_context_t *ctx,
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unsigned char output[16]);
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/**
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* \brief MD5 process data block (internal use only)
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*
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* \param ctx MD5 context
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* \param data buffer holding one block of data
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*
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* \return 0 if successful
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*
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* \warning MD5 is considered a weak message digest and its use
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* constitutes a security risk. We recommend considering
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* stronger message digests instead.
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*
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*/
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int32_t utils_internal_md5_process(utils_md5_context_t *ctx,
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const unsigned char data[64]);
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/**
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* \brief Output = MD5( 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 MD5 checksum result
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*
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* \return 0 if successful
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*
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* \warning MD5 is considered a weak message digest and its use
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* constitutes a security risk. We recommend considering
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* stronger message digests instead.
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*
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*/
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __OTA_MD5_H__ */
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