ascon.h

#ifndef ASCON_H_
#define ASCON_H_

#include <stdint.h>

#include "word.h"

typedef union {
  uint64_t x[5];
  uint32_t w[5][2];
  uint8_t b[5][8];
} state_t;

typedef struct {
#if (CRYPTO_KEYBYTES == 20)
  uint64_t k0;
#endif
  uint64_t k1;
  uint64_t k2;
} key_t;

void ascon_initaead(state_t* s, const uint8_t* npub, const key_t* k);
void ascon_adata(state_t* s, const uint8_t* ad, uint64_t adlen);
void ascon_encrypt(state_t* s, uint8_t* c, const uint8_t* m, uint64_t mlen);
void ascon_decrypt(state_t* s, uint8_t* m, const uint8_t* c, uint64_t clen);
void ascon_final(state_t* s, const key_t* k);

void ascon_inithash(state_t* s);
void ascon_absorb(state_t* s, const uint8_t* in, uint64_t inlen);
void ascon_squeeze(state_t* s, uint8_t* out, uint64_t outlen);

#endif /* ASCON_H_ */