poly1305-internal.h

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/* poly1305-internal.h  -  Poly1305 internals

 * Copyright (C) 2014 Jussi Kivilinna <jussi.kivilinna@iki.fi>

 * This file is part of Libgcrypt.

 * Libgcrypt 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.

 * Libgcrypt 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 this program; if not, see <http://www.gnu.org/licenses/>.

*/

#ifndef G10_POLY1305_INTERNAL_H

#define G10_POLY1305_INTERNAL_H

#include <config.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include "types.h"

#include "g10lib.h"

#include "cipher.h"

#include "bufhelp.h"

#define POLY1305_TAGLEN 16

#define POLY1305_KEYLEN 32

#define POLY1305_BLOCKSIZE 16

typedef struct

  u32 k[4];

  u32 r[4];

  u32 h[5];

} POLY1305_STATE;

typedef struct poly1305_context_s

  POLY1305_STATE state;

  byte buffer[POLY1305_BLOCKSIZE];

  unsigned int leftover;

} poly1305_context_t;

gcry_err_code_t _gcry_poly1305_init (poly1305_context_t *ctx, const byte *key,

				     size_t keylen);

void _gcry_poly1305_finish (poly1305_context_t *ctx,

			     byte mac[POLY1305_TAGLEN]);

void _gcry_poly1305_update (poly1305_context_t *ctx, const byte *buf,

			     size_t buflen);

unsigned int _gcry_poly1305_update_burn (poly1305_context_t *ctx,

					 const byte *m, size_t bytes);

#endif /* G10_POLY1305_INTERNAL_H */