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sha3.h
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sha3.h
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/* sha3.h - an implementation of Secure Hash Algorithm 3 (Keccak).
* based on the
* The Keccak SHA-3 submission. Submission to NIST (Round 3), 2011
* by Guido Bertoni, Joan Daemen, Michaël Peeters and Gilles Van Assche
*
* Copyright: 2013 Aleksey Kravchenko <rhash.admin@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. Use this program at your own risk!
*/
#ifndef __SHA3_H__
#define __SHA3_H__
#include <stdint.h>
#include "options.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
#define SHA3_224_BLOCK_LENGTH 144
#define SHA3_256_BLOCK_LENGTH 136
#define SHA3_384_BLOCK_LENGTH 104
#define SHA3_512_BLOCK_LENGTH 72
#define SHA3_224_DIGEST_LENGTH sha3_224_hash_size
#define SHA3_256_DIGEST_LENGTH sha3_256_hash_size
#define SHA3_384_DIGEST_LENGTH sha3_384_hash_size
#define SHA3_512_DIGEST_LENGTH sha3_512_hash_size
/**
* 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 sha3_224_Init(SHA3_CTX *ctx);
void sha3_256_Init(SHA3_CTX *ctx);
void sha3_384_Init(SHA3_CTX *ctx);
void sha3_512_Init(SHA3_CTX *ctx);
void sha3_Update(SHA3_CTX *ctx, const unsigned char* msg, size_t size);
void sha3_Final(SHA3_CTX *ctx, unsigned char* result);
#if USE_KECCAK
#define keccak_224_Init sha3_224_Init
#define keccak_256_Init sha3_256_Init
#define keccak_384_Init sha3_384_Init
#define keccak_512_Init sha3_512_Init
#define keccak_Update sha3_Update
void keccak_Final(SHA3_CTX *ctx, unsigned char* result);
void keccak_256(const unsigned char* data, size_t len, unsigned char* digest);
void keccak_512(const unsigned char* data, size_t len, unsigned char* digest);
#endif
void sha3_256(const unsigned char* data, size_t len, unsigned char* digest);
void sha3_512(const unsigned char* data, size_t len, unsigned char* digest);
#ifdef __cplusplus
} /* extern "C" */
#endif /* __cplusplus */
#endif /* __SHA3_H__ */