hash.h

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/************************************************************************//**
 * \file    heivs/hash.h
 * \brief   hash abstraction
 * \author  marc dot pignat at hevs dot ch
 *
 * This abstraction will be used to hide hash (md5s, sha-1, crc, ...) functions
 * \ingroup libheivs_stm32_misc
 * @{
 ***************************************************************************/
#ifndef HEIVS_HASH_H
#define HEIVS_HASH_H

#ifdef __cplusplus
    extern "C" {
#endif

#include <stddef.h>
#include <stdint.h>
#include "heivs/error.h"

enum hash_state_e
{
    HASH_STATE_IDLE = 0,
    HASH_STATE_BUSY,
};

struct heivs_hash_t
{
    const char *name;
    enum hash_state_e state;

    status_e (*init)(struct heivs_hash_t *hash, void *state, size_t state_size);
    status_e (*run)(struct heivs_hash_t *hash, void *state, const void *data, size_t size);
    status_e (*finish)(struct heivs_hash_t *hash, void *state);

    const size_t state_size;
    const size_t hash_size;
};

status_e hash_init(struct heivs_hash_t *hash, void *state, size_t state_size);
status_e hash_run(struct heivs_hash_t *hash, void *state, const void *data, size_t size);
status_e hash_finish(struct heivs_hash_t *hash, void *state);

#define hash_declare_state(pHash, name) uint32_t name[pHash->state_size/sizeof(uint32_t)]

#ifdef __cplusplus
    }
#endif

/**
 * @}
 */
#endif /* HEIVS_HASH_H */