camellia-crypt-internal.c

/* camellia-crypt-internal.c
 *
 * Copyright (C) 2006,2007
 * NTT (Nippon Telegraph and Telephone Corporation).
 *
 * Copyright (C) 2010 Niels Mller
 *
 * This 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.
 *
 * This 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 this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

/*
 * Algorithm Specification 
 *  http://info.isl.ntt.co.jp/crypt/eng/camellia/specifications.html
 */

/* Based on camellia.c ver 1.2.0, see
   http://info.isl.ntt.co.jp/crypt/eng/camellia/dl/camellia-LGPL-1.2.0.tar.gz.
 */
#if HAVE_CONFIG_H
# include "config.h"
#endif

#include <assert.h>
#include <limits.h>

#include "camellia-internal.h"

#include "macros.h"

#define CAMELLIA_FL(x, k) do {			\
  uint32_t __xl, __xr, __kl, __kr, __t;		\
  __xl = (x) >> 32;				\
  __xr = (x) & 0xffffffff;			\
  __kl = (k) >> 32;				\
  __kr = (k) & 0xffffffff;			\
  __t = __xl & __kl;				\
  __xr ^= ROL32(1, __t);			\
  __xl ^= (__xr | __kr);			\
  (x) = ((uint64_t) __xl << 32) | __xr;		\
} while (0)

#define CAMELLIA_FLINV(x, k) do {		\
  uint32_t __xl, __xr, __kl, __kr, __t;		\
  __xl = (x) >> 32;				\
  __xr = (x) & 0xffffffff;			\
  __kl = (k) >> 32;				\
  __kr = (k) & 0xffffffff;			\
  __xl ^= (__xr | __kr);			\
  __t = __xl & __kl;				\
  __xr ^= ROL32(1, __t);			\
  (x) = ((uint64_t) __xl << 32) | __xr;		\
} while (0)

#if HAVE_NATIVE_64_BIT
#define CAMELLIA_ROUNDSM(T, x, k, y) do {			\
    uint32_t __il, __ir;					\
    __ir							\
      = T->sp1110[(x) & 0xff]					\