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/*
* Ouroboros - Copyright (C) 2016 - 2017
*
* SHA3 algorithm
*
* Dimitri Staessens <dimitri.staessens@ugent.be>
* Sander Vrijders <sander.vrijders@ugent.be>
*
* This implementation is adapted and redistributed from the RHASH
* project implementation of the sha3 algorithm
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* version 2.1 as published by the Free Software Foundation.
*
* This library 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. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* -- original license
*
* sha3.c - 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 OUROBOROS_LIB_SHA3_H
#define OUROBOROS_LIB_SHA3_H
#include <unistd.h>
#include <stdint.h>
#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
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;
};
void rhash_sha3_224_init(struct sha3_ctx * ctx);
void rhash_sha3_256_init(struct sha3_ctx * ctx);
void rhash_sha3_384_init(struct sha3_ctx * ctx);
void rhash_sha3_512_init(struct sha3_ctx * ctx);
void rhash_sha3_update(struct sha3_ctx * ctx,
const uint8_t * msg,
size_t size);
void rhash_sha3_final(struct sha3_ctx * ctx,
uint8_t * res);
#endif /* OUROBOROS_LIB_SHA3_H */
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