trezor-firmware/crypto/blake2b.h

#ifndef __BLAKE2B_H__
#define __BLAKE2B_H__

#include <stddef.h>
#include <stdint.h>

enum blake2b_constant {
  BLAKE2B_BLOCKBYTES = 128,
  BLAKE2B_OUTBYTES = 64,
  BLAKE2B_KEYBYTES = 64,
  BLAKE2B_SALTBYTES = 16,
  BLAKE2B_PERSONALBYTES = 16
};

typedef struct __blake2b_state {
  uint64_t h[8];
  uint64_t t[2];
  uint64_t f[2];
  uint8_t buf[BLAKE2B_BLOCKBYTES];
  size_t buflen;
  size_t outlen;
  uint8_t last_node;
} blake2b_state;

#define BLAKE2B_CTX blake2b_state
#define BLAKE2B_BLOCK_LENGTH BLAKE2B_BLOCKBYTES
#define BLAKE2B_DIGEST_LENGTH BLAKE2B_OUTBYTES
#define BLAKE2B_KEY_LENGTH BLAKE2B_KEYBYTES

int blake2b_Init(blake2b_state *S, size_t outlen);
int blake2b_InitKey(blake2b_state *S, size_t outlen, const void *key,
                    size_t keylen);
int blake2b_InitPersonal(blake2b_state *S, size_t outlen, const void *personal,
                         size_t personal_len);
int blake2b_Update(blake2b_state *S, const void *pin, size_t inlen);
int blake2b_Final(blake2b_state *S, void *out, size_t outlen);

int blake2b(const uint8_t *msg, uint32_t msg_len, void *out, size_t outlen);
int blake2b_Key(const uint8_t *msg, uint32_t msg_len, const void *key,
                size_t keylen, void *out, size_t outlen);

#endif