shake.h

#ifndef __UTIL_SHAKE_H__
#define __UTIL_SHAKE_H__

#include "../firmware.h"

/* Shake Context */
typedef struct {
    union {                                 // state:
        uint8_t b[200];                     // 8-bit bytes
        uint64_t q[25];                     // 64-bit words
    } st;
    int pt, rsiz;                    // these don't overflow
    uint32_t mdlen;
} util_shake_ctx_t;

void Util_shake_init(util_shake_ctx_t *c, uint8_t output_length);

void Util_shake_update(util_shake_ctx_t *c, const uint8_t *data, uint32_t data_length);

void Util_shake_out(util_shake_ctx_t *c, uint8_t *out);

#endif /* __UTIL_SHAKE_H__ */