aes.c

/* aes.c
 *
 * The aes/rijndael block cipher.
 */

/* nettle, low-level cryptographics library
 *
 * Copyright (C) 2000, 2001 Rafael R. Sevilla, Niels Mller
 *  
 * 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.
 */

/* Originally written by Rafael R. Sevilla <dido@pacific.net.ph> */

#include "aes-internal.h"

#include "macros.h"

#include <assert.h>

#ifndef AES_DEBUG
# define AES_DEBUG 0
#endif

#if AES_DEBUG
# include <stdio.h>

static void
d4(const char *name, unsigned r, const uint32_t *data)
{
  unsigned j;
  
  fprintf(stderr, "aes, %d, %s: ", r, name);

  for (j = 0; j<4; j++)
    fprintf(stderr, "%08x, ", data[j]);
  fprintf(stderr, "\n");
}
static void
d2(const char *aname, uint32_t a, const char *bname,  uint32_t b)
{
  fprintf(stderr, "aes, %s: %08x, %s, %08x\n",
	  aname, a, bname, b);
}
# define D4(x) d4 x
# define D2(x) d2 x
#else
# define D4(x)
# define D2(x)
#endif

/* Get the byte with index 0, 1, 2 and 3 */
#define B0(x) ((x) & 0xff)
#define B1(x) (((x) >> 8) & 0xff)
#define B2(x) (((x) >> 16) & 0xff)
#define B3(x) (((x) >> 24) & 0xff)