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/* sha2.h
*
* The sha2 family of hash functions.
*/
/* nettle, low-level cryptographics library
*
* Copyright (C) 2001, 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.
*/
#ifndef NETTLE_SHA2_H_INCLUDED
#define NETTLE_SHA2_H_INCLUDED
#include "nettle-types.h"
#ifdef __cplusplus
extern "C" {
#endif
/* Name mangling */
#define sha224_init nettle_sha224_init
#define sha224_digest nettle_sha224_digest
#define sha256_init nettle_sha256_init
#define sha256_update nettle_sha256_update
#define sha256_digest nettle_sha256_digest
#define sha384_init nettle_sha384_init
#define sha384_digest nettle_sha384_digest
#define sha512_init nettle_sha512_init
#define sha512_update nettle_sha512_update
#define sha512_digest nettle_sha512_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);
/* Internal compression function. STATE points to 8 uint32_t words,
DATA points to 64 bytes of input data, possibly unaligned, and K
points to the table of constants. */
void
_nettle_sha256_compress(uint32_t *state, const uint8_t *data, const uint32_t *k);
/* SHA224, a truncated SHA256 with different initial state. */
#define SHA224_DIGEST_SIZE 28
#define SHA224_DATA_SIZE SHA256_DATA_SIZE
#define sha224_ctx sha256_ctx
void
sha224_init(struct sha256_ctx *ctx);
#define sha224_update nettle_sha256_update
void
sha224_digest(struct sha256_ctx *ctx,
unsigned length,
uint8_t *digest);
/* SHA512 */
#define SHA512_DIGEST_SIZE 64
#define SHA512_DATA_SIZE 128
/* Digest is kept internally as 8 64-bit words. */
#define _SHA512_DIGEST_LENGTH 8
struct sha512_ctx
{
uint64_t state[_SHA512_DIGEST_LENGTH]; /* State variables */
uint64_t count_low, count_high; /* 128-bit block count */
uint8_t block[SHA512_DATA_SIZE]; /* SHA512 data buffer */
unsigned int index; /* index into buffer */
};
void
sha512_init(struct sha512_ctx *ctx);
void
sha512_update(struct sha512_ctx *ctx,
unsigned length,
const uint8_t *data);
void
sha512_digest(struct sha512_ctx *ctx,
unsigned length,
uint8_t *digest);
/* Internal compression function. STATE points to 8 uint64_t words,
DATA points to 128 bytes of input data, possibly unaligned, and K
points to the table of constants. */
void
_nettle_sha512_compress(uint64_t *state, const uint8_t *data, const uint64_t *k);
/* SHA384, a truncated SHA512 with different initial state. */
#define SHA384_DIGEST_SIZE 48
#define SHA384_DATA_SIZE SHA512_DATA_SIZE
#define sha384_ctx sha512_ctx
void
sha384_init(struct sha512_ctx *ctx);
#define sha384_update nettle_sha512_update
void
sha384_digest(struct sha512_ctx *ctx,
unsigned length,
uint8_t *digest);
#ifdef __cplusplus
}
#endif
#endif /* NETTLE_SHA2_H_INCLUDED */
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