+++ /dev/null
-/* -*-c-*-
- *
- * $Id: rijndael256.c,v 1.2 2004/04/08 01:36:15 mdw Exp $
- *
- * The Rijndael block cipher, 256-bit version
- *
- * (c) 2001 Straylight/Edgeware
- */
-
-/*----- Licensing notice --------------------------------------------------*
- *
- * This file is part of Catacomb.
- *
- * Catacomb is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Library General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * Catacomb 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 Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with Catacomb; if not, write to the Free
- * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- * MA 02111-1307, USA.
- */
-
-/*----- Header files ------------------------------------------------------*/
-
-#include <assert.h>
-#include <stdio.h>
-
-#include <mLib/bits.h>
-
-#include "blkc.h"
-#include "gcipher.h"
-#include "rijndael.h"
-#include "rijndael256.h"
-#include "rijndael-base.h"
-
-/*----- Main code ---------------------------------------------------------*/
-
-/* --- @rijndael256_init@ --- *
- *
- * Arguments: @rijndael_ctx *k@ = pointer to context to initialize
- * @const void *buf@ = pointer to buffer of key material
- * @size_t sz@ = size of the key material
- *
- * Returns: ---
- *
- * Use: Initializes a Rijndael context with a particular key. This
- * implementation of Rijndael doesn't impose any particular
- * limits on the key size except that it must be multiple of 4
- * bytes long. 256 bits seems sensible, though.
- */
-
-void rijndael256_init(rijndael_ctx *k, const void *buf, size_t sz)
-{
- rijndael_setup(k, RIJNDAEL256_BLKSZ / 4, buf, sz);
-}
-
-/* --- @rijndael256_eblk@, @rijndael256_dblk@ --- *
- *
- * Arguments: @const rijndael_ctx *k@ = pointer to Rijndael context
- * @const uint32 s[4]@ = pointer to source block
- * @uint32 d[4]@ = pointer to destination block
- *
- * Returns: ---
- *
- * Use: Low-level block encryption and decryption.
- */
-
-#define DO(what, t, \
- aa, bb, cc, dd, ee, ff, gg, hh, \
- a, b, c, d, e, f, g, h, w) do { \
- aa = what(t, a, b, d, e) ^ *w++; \
- bb = what(t, b, c, e, f) ^ *w++; \
- cc = what(t, c, d, f, g) ^ *w++; \
- dd = what(t, d, e, g, h) ^ *w++; \
- ee = what(t, e, f, h, a) ^ *w++; \
- ff = what(t, f, g, a, b) ^ *w++; \
- gg = what(t, g, h, b, c) ^ *w++; \
- hh = what(t, h, a, c, d) ^ *w++; \
-} while (0)
-
-#define UNDO(what, t, \
- aa, bb, cc, dd, ee, ff, gg, hh, \
- a, b, c, d, e, f, g, h, w) do { \
- aa = what(t, a, h, f, e) ^ *w++; \
- bb = what(t, b, a, g, f) ^ *w++; \
- cc = what(t, c, b, h, g) ^ *w++; \
- dd = what(t, d, c, a, h) ^ *w++; \
- ee = what(t, e, d, b, a) ^ *w++; \
- ff = what(t, f, e, c, b) ^ *w++; \
- gg = what(t, g, f, d, c) ^ *w++; \
- hh = what(t, h, g, e, d) ^ *w++; \
-} while (0)
-
-void rijndael256_eblk(const rijndael_ctx *k, const uint32 *s, uint32 *dst)
-{
- uint32 a = s[0], b = s[1], c = s[2], d = s[3];
- uint32 e = s[4], f = s[5], g = s[6], h = s[7];
- uint32 aa, bb, cc, dd, ee, ff, gg, hh;
- const uint32 *w = k->w;
-
- a ^= *w++; b ^= *w++; c ^= *w++; d ^= *w++;
- e ^= *w++; f ^= *w++; g ^= *w++; h ^= *w++;
-
- DO(MIX, T, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
- DO(MIX, T, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
- DO(MIX, T, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
- DO(MIX, T, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
- DO(MIX, T, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
- DO(MIX, T, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
- DO(MIX, T, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
- DO(MIX, T, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
- DO(MIX, T, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
- DO(MIX, T, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
- DO(MIX, T, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
- DO(MIX, T, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
- DO(MIX, T, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
- DO(SUB, S, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
-
- dst[0] = a; dst[1] = b; dst[2] = c; dst[3] = d;
- dst[4] = e; dst[5] = f; dst[6] = g; dst[7] = h;
-}
-
-void rijndael256_dblk(const rijndael_ctx *k, const uint32 *s, uint32 *dst)
-{
- uint32 a = s[0], b = s[1], c = s[2], d = s[3];
- uint32 e = s[4], f = s[5], g = s[6], h = s[7];
- uint32 aa, bb, cc, dd, ee, ff, gg, hh;
- const uint32 *w = k->wi;
-
- a ^= *w++; b ^= *w++; c ^= *w++; d ^= *w++;
- e ^= *w++; f ^= *w++; g ^= *w++; h ^= *w++;
-
- UNDO(MIX, TI, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
- UNDO(MIX, TI, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
- UNDO(MIX, TI, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
- UNDO(MIX, TI, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
- UNDO(MIX, TI, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
- UNDO(MIX, TI, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
- UNDO(MIX, TI, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
- UNDO(MIX, TI, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
- UNDO(MIX, TI, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
- UNDO(MIX, TI, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
- UNDO(MIX, TI, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
- UNDO(MIX, TI, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
- UNDO(MIX, TI, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
- UNDO(SUB, SI, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
-
- dst[0] = a; dst[1] = b; dst[2] = c; dst[3] = d;
- dst[4] = e; dst[5] = f; dst[6] = g; dst[7] = h;
-}
-
-BLKC_TEST(RIJNDAEL256, rijndael256)
-
-/*----- That's all, folks -------------------------------------------------*/
~mdw / catacomb / blobdiff