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/* hmac.h
*
* HMAC message authentication code (RFC-2104).
*/
/* nettle, low-level cryptographics library
*
* Copyright (C) 2001, 2002 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_HMAC_H_INCLUDED
#define NETTLE_HMAC_H_INCLUDED
#include "nettle-meta.h"
#include "md5.h"
#include "sha.h"
/* Namespace mangling */
#define hmac_set_key nettle_hmac_set_key
#define hmac_update nettle_hmac_update
#define hmac_digest nettle_hmac_digest
#define hmac_md5_set_key nettle_hmac_md5_set_key
#define hmac_md5_update nettle_hmac_md5_update
#define hmac_md5_digest nettle_hmac_md5_digest
#define hmac_sha1_set_key nettle_hmac_sha1_set_key
#define hmac_sha1_update nettle_hmac_sha1_update
#define hmac_sha1_digest nettle_hmac_sha1_digest
#define hmac_sha256_set_key nettle_hmac_sha256_set_key
#define hmac_sha256_update nettle_hmac_sha256_update
#define hmac_sha256_digest nettle_hmac_sha256_digest
void
hmac_set_key(void *outer, void *inner, void *state,
const struct nettle_hash *hash,
unsigned length, const uint8_t *key);
/* This function is not strictly needed, it's s just the same as the
* hash update function. */
void
hmac_update(void *state,
const struct nettle_hash *hash,
unsigned length, const uint8_t *data);
void
hmac_digest(const void *outer, const void *inner, void *state,
const struct nettle_hash *hash,
unsigned length, uint8_t *digest);
#define HMAC_CTX(type) \
{ type outer; type inner; type state; }
#define HMAC_SET_KEY(ctx, hash, length, key) \
hmac_set_key( &(ctx)->outer, &(ctx)->inner, &(ctx)->state, \
(hash), (length), (key) )
#define HMAC_DIGEST(ctx, hash, length, digest) \
hmac_digest( &(ctx)->outer, &(ctx)->inner, &(ctx)->state, \
(hash), (length), (digest) )
/* HMAC using specific hash functions */
/* hmac-md5 */
struct hmac_md5_ctx HMAC_CTX(struct md5_ctx);
void
hmac_md5_set_key(struct hmac_md5_ctx *ctx,
unsigned key_length, const uint8_t *key);
void
hmac_md5_update(struct hmac_md5_ctx *ctx,
unsigned length, const uint8_t *data);
void
hmac_md5_digest(struct hmac_md5_ctx *ctx,
unsigned length, uint8_t *digest);
/* hmac-sha1 */
struct hmac_sha1_ctx HMAC_CTX(struct sha1_ctx);
void
hmac_sha1_set_key(struct hmac_sha1_ctx *ctx,
unsigned key_length, const uint8_t *key);
void
hmac_sha1_update(struct hmac_sha1_ctx *ctx,
unsigned length, const uint8_t *data);
void
hmac_sha1_digest(struct hmac_sha1_ctx *ctx,
unsigned length, uint8_t *digest);
/* hmac-sha256 */
struct hmac_sha256_ctx HMAC_CTX(struct sha256_ctx);
void
hmac_sha256_set_key(struct hmac_sha256_ctx *ctx,
unsigned key_length, const uint8_t *key);
void
hmac_sha256_update(struct hmac_sha256_ctx *ctx,
unsigned length, const uint8_t *data);
void
hmac_sha256_digest(struct hmac_sha256_ctx *ctx,
unsigned length, uint8_t *digest);
#endif /* NETTLE_HMAC_H_INCLUDED */
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