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/* sha3-256.c
*
* The sha3 hash function, 256 bit output.
*/
/* nettle, low-level cryptographics library
*
* Copyright (C) 2012 Niels Möller
*
* The nettle library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version.
*
* The nettle 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 the nettle library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02111-1301, USA.
*/
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include <stddef.h>
#include <string.h>
#include "sha3.h"
#include "nettle-write.h"
void
sha3_256_init (struct sha3_256_ctx *ctx)
{
memset (&ctx->state, 0, offsetof (struct sha3_256_ctx, block));
}
void
sha3_256_update (struct sha3_256_ctx *ctx,
unsigned length,
const uint8_t *data)
{
ctx->index = _sha3_update (&ctx->state, SHA3_256_DATA_SIZE, ctx->block,
ctx->index, length, data);
}
void
sha3_256_digest(struct sha3_256_ctx *ctx,
unsigned length,
uint8_t *digest)
{
_sha3_pad (&ctx->state, SHA3_256_DATA_SIZE, ctx->block, ctx->index);
_nettle_write_le64 (length, digest, ctx->state.a);
sha3_256_init (ctx);
}
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