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/* sha.h
*
* The sha1 and sha256 hash functions.
*/
/* nettle, low-level cryptographics library
*
* Copyright (C) 2001 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., 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*/
#ifndef NETTLE_SHA_H_INCLUDED
#define NETTLE_SHA_H_INCLUDED
#include <inttypes.h>
/* SHA1 */
#define SHA1_DIGEST_SIZE 20
#define SHA1_DATA_SIZE 64
/* Digest is kept internally as 5 32-bit words. */
#define _SHA1_DIGEST_LENGTH 5
struct sha1_ctx
{
uint32_t digest[_SHA1_DIGEST_LENGTH]; /* Message digest */
uint32_t count_low, count_high; /* 64-bit block count */
uint8_t block[SHA1_DATA_SIZE]; /* SHA1 data buffer */
unsigned int index; /* index into buffer */
};
void
sha1_init(struct sha1_ctx *ctx);
void
sha1_update(struct sha1_ctx *ctx,
unsigned length,
const uint8_t *data);
void
sha1_digest(struct sha1_ctx *ctx,
unsigned length,
uint8_t *digest);
/* SHA256 */
#define SHA256_DIGEST_SIZE 32
#define SHA256_DATA_SIZE 64
/* Digest is kept internally as 8 32-bit words. */
#define _SHA256_DIGEST_LENGTH 8
struct sha256_ctx
{
uint32_t state[_SHA256_DIGEST_LENGTH]; /* State variables */
uint32_t count_low, count_high; /* 64-bit block count */
uint8_t block[SHA256_DATA_SIZE]; /* SHA256 data buffer */
unsigned int index; /* index into buffer */
};
void
sha256_init(struct sha256_ctx *ctx);
void
sha256_update(struct sha256_ctx *ctx,
unsigned length,
const uint8_t *data);
void
sha256_digest(struct sha256_ctx *ctx,
unsigned length,
uint8_t *digest);
#endif /* NETTLE_SHA_H_INCLUDED */
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