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* Copyright (C) 2001 Niels Moller
* 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., 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
#ifndef __SHA256_H
#define __SHA256_H
#include "cltypes.h"
#define SHA256_DIGEST_SIZE 32
#define SHA256_DATA_SIZE 64
/* Digest is kept internally as 8 32-bit words. */
#define _SHA256_DIGEST_LENGTH 8
typedef struct sha256_ctx
uint32_t state[_SHA256_DIGEST_LENGTH]; /* State variables */
uint32_t count_low, count_high; /* 64-bit block count */
unsigned char block[SHA256_DATA_SIZE]; /* SHA256 data buffer */
uint32_t index; /* index into buffer */
} SHA256_CTX;
sha256_init(struct sha256_ctx *ctx);
sha256_update(struct sha256_ctx *ctx, const unsigned char *data, uint32_t length);
sha256_final(struct sha256_ctx *ctx);
sha256_digest(const struct sha256_ctx *ctx, unsigned char *digest);