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sha3.hpp
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sha3.hpp
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/* https://github.com/mjosaarinen/tiny_sha3
*
* The MIT License (MIT)
*
* Copyright (c) 2015 Markku-Juhani O. Saarinen
*
* 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, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
// sha3.h
// 19-Nov-11 Markku-Juhani O. Saarinen <mjos@iki.fi>
#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
// compute a sha3 hash (md) of given byte length from "in"
void *sha3(const void *in, size_t inlen, void *md, int mdlen);
// SHAKE128 and SHAKE256 extensible-output functions
#define shake128_init(c) sha3_init(c, 16)
#define shake256_init(c) sha3_init(c, 32)
#define shake_update sha3_update
void shake_xof(sha3_ctx_t *c);
void shake_out(sha3_ctx_t *c, void *out, size_t len);
#endif