cruzbit 1.2.0

// sha3.h
// 19-Nov-11  Markku-Juhani O. Saarinen <mjos@iki.fi>
// Revised 21-Jul-19 to strip unneeded code and move sha3_ctx_t to its own file.
// we need to build both a host and device version of this code. -asdvxgxasjab

#ifndef SHA3_H
#define SHA3_H

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

#ifndef KECCAKF_ROUNDS
#define KECCAKF_ROUNDS 24
#endif

#ifndef ROTL64
#define ROTL64(x, y) (((x) << (y)) | ((x) >> (64 - (y))))
#endif

// state context
typedef struct {
  union {           // state:
    uint8_t b[200]; // 8-bit bytes
    uint64_t q[25]; // 64-bit words
  } st;
  int pt, rsiz, mdlen; // these don't overflow
} sha3_ctx_t;

// Compression function.
void sha3_keccakf(uint64_t st[25]);

// OpenSSL - like interfece
int sha3_init(sha3_ctx_t *c,
              int mdlen); // mdlen = hash output in bytes
int sha3_update(sha3_ctx_t *c, const void *data, size_t len);
int sha3_final(void *md, sha3_ctx_t *c); // digest goes to md

#endif