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/* sha3.h */
#ifndef RHASH_SHA3_H
#define RHASH_SHA3_H
#include "ustd.h"
#ifdef __cplusplus
extern "C" {
#endif
#define sha3_224_hash_size 28
#define sha3_256_hash_size 32
#define sha3_384_hash_size 48
#define sha3_512_hash_size 64
#define sha3_max_permutation_size 25
#define sha3_max_rate_in_qwords 24
/**
* SHA3 Algorithm context.
*/
typedef struct sha3_ctx
{
/* 1600 bits algorithm hashing state */
uint64_t hash[sha3_max_permutation_size];
/* 1536-bit buffer for leftovers */
uint64_t message[sha3_max_rate_in_qwords];
/* count of bytes in the message[] buffer */
unsigned rest;
/* size of a message block processed at once */
unsigned block_size;
} sha3_ctx;
/* methods for calculating the hash function */
void rhash_sha3_224_init(sha3_ctx *ctx);
void rhash_sha3_256_init(sha3_ctx *ctx);
void rhash_sha3_384_init(sha3_ctx *ctx);
void rhash_sha3_512_init(sha3_ctx *ctx);
void rhash_sha3_update(sha3_ctx *ctx, const unsigned char* msg, size_t size);
void rhash_sha3_final(sha3_ctx *ctx, unsigned char* result);
#ifdef USE_KECCAK
#define rhash_keccak_224_init rhash_sha3_224_init
#define rhash_keccak_256_init rhash_sha3_256_init
#define rhash_keccak_384_init rhash_sha3_384_init
#define rhash_keccak_512_init rhash_sha3_512_init
#define rhash_keccak_update rhash_sha3_update
void rhash_keccak_final(sha3_ctx *ctx, unsigned char* result);
#endif
#ifdef __cplusplus
} /* extern "C" */
#endif /* __cplusplus */
#endif /* RHASH_SHA3_H */
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