[u/mdw/catacomb] / rijndael256.c

/* -*-c-*-
 *
 * $Id: rijndael256.c,v 1.1 2001/05/07 17:32:03 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.
 */

/*----- Revision history --------------------------------------------------* 
 *
 * $Log: rijndael256.c,v $
 * Revision 1.1  2001/05/07 17:32:03  mdw
 * New Rijndael block sizes.
 *
 */

/*----- 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;
  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;
  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 -------------------------------------------------*/
Commit	Line	Data
2e8eb64a	1	/* --c--
	2	*
	3	* $Id: rijndael256.c,v 1.1 2001/05/07 17:32:03 mdw Exp $
	4	*
	5	* The Rijndael block cipher, 256-bit version
	6	*
	7	* (c) 2001 Straylight/Edgeware
	8	*/
	9
	10	/----- Licensing notice --------------------------------------------------
	11	*
	12	* This file is part of Catacomb.
	13	*
	14	* Catacomb is free software; you can redistribute it and/or modify
	15	* it under the terms of the GNU Library General Public License as
	16	* published by the Free Software Foundation; either version 2 of the
	17	* License, or (at your option) any later version.
	18	*
	19	* Catacomb is distributed in the hope that it will be useful,
	20	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	21	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	22	* GNU Library General Public License for more details.
	23	*
	24	* You should have received a copy of the GNU Library General Public
	25	* License along with Catacomb; if not, write to the Free
	26	* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
	27	* MA 02111-1307, USA.
	28	*/
	29
	30	/----- Revision history --------------------------------------------------
	31	*
	32	* $Log: rijndael256.c,v $
	33	* Revision 1.1 2001/05/07 17:32:03 mdw
	34	* New Rijndael block sizes.
	35	*
	36	*/
	37
	38	/----- Header files ------------------------------------------------------/
	39
	40	#include <assert.h>
	41	#include <stdio.h>
	42
	43	#include <mLib/bits.h>
	44
	45	#include "blkc.h"
	46	#include "gcipher.h"
	47	#include "rijndael.h"
	48	#include "rijndael256.h"
	49	#include "rijndael-base.h"
	50
	51	/----- Main code ---------------------------------------------------------/
	52
	53	/* --- @rijndael256_init@ --- *
	54	*
	55	* Arguments: @rijndael_ctx *k@ = pointer to context to initialize
	56	* @const void *buf@ = pointer to buffer of key material
	57	* @size_t sz@ = size of the key material
	58	*
	59	* Returns: ---
	60	*
	61	* Use: Initializes a Rijndael context with a particular key. This
	62	* implementation of Rijndael doesn't impose any particular
	63	* limits on the key size except that it must be multiple of 4
	64	* bytes long. 256 bits seems sensible, though.
65	*/
66
67	void rijndael256_init(rijndael_ctx k, const void buf, size_t sz)
68	{
69	rijndael_setup(k, RIJNDAEL256_BLKSZ / 4, buf, sz);
70	}
71
72	/* --- @rijndael256_eblk@, @rijndael256_dblk@ --- *
73	*
74	* Arguments: @const rijndael_ctx *k@ = pointer to Rijndael context
75	* @const uint32 s[4]@ = pointer to source block
76	* @uint32 d[4]@ = pointer to destination block
77	*
78	* Returns: ---
79	*
80	* Use: Low-level block encryption and decryption.
81	*/
82
83	#define DO(what, t, \
84	aa, bb, cc, dd, ee, ff, gg, hh, \
85	a, b, c, d, e, f, g, h, w) do { \
86	aa = what(t, a, b, d, e) ^ *w++; \
87	bb = what(t, b, c, e, f) ^ *w++; \
88	cc = what(t, c, d, f, g) ^ *w++; \
89	dd = what(t, d, e, g, h) ^ *w++; \
90	ee = what(t, e, f, h, a) ^ *w++; \
91	ff = what(t, f, g, a, b) ^ *w++; \
92	gg = what(t, g, h, b, c) ^ *w++; \
93	hh = what(t, h, a, c, d) ^ *w++; \
94	} while (0)
95
96	#define UNDO(what, t, \
97	aa, bb, cc, dd, ee, ff, gg, hh, \
98	a, b, c, d, e, f, g, h, w) do { \
99	aa = what(t, a, h, f, e) ^ *w++; \
100	bb = what(t, b, a, g, f) ^ *w++; \
101	cc = what(t, c, b, h, g) ^ *w++; \
102	dd = what(t, d, c, a, h) ^ *w++; \
103	ee = what(t, e, d, b, a) ^ *w++; \
104	ff = what(t, f, e, c, b) ^ *w++; \
105	gg = what(t, g, f, d, c) ^ *w++; \
106	hh = what(t, h, g, e, d) ^ *w++; \
107	} while (0)
108
109	void rijndael256_eblk(const rijndael_ctx k, const uint32 s, uint32 *dst)
110	{
111	uint32 a = s[0], b = s[1], c = s[2], d = s[3];
112	uint32 e = s[4], f = s[5], g = s[6], h = s[7];
113	uint32 aa, bb, cc, dd, ee, ff, gg, hh;
114	uint32 *w = k->w;
115
116	a ^= w++; b ^= w++; c ^= w++; d ^= w++;
117	e ^= w++; f ^= w++; g ^= w++; h ^= w++;
118
119	DO(MIX, T, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
120	DO(MIX, T, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
121	DO(MIX, T, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
122	DO(MIX, T, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
123	DO(MIX, T, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
124	DO(MIX, T, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
125	DO(MIX, T, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
126	DO(MIX, T, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
127	DO(MIX, T, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
128	DO(MIX, T, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
129	DO(MIX, T, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
130	DO(MIX, T, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
131	DO(MIX, T, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
132	DO(SUB, S, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
133
134	dst[0] = a; dst[1] = b; dst[2] = c; dst[3] = d;
135	dst[4] = e; dst[5] = f; dst[6] = g; dst[7] = h;
136	}
137
138	void rijndael256_dblk(const rijndael_ctx k, const uint32 s, uint32 *dst)
139	{
140	uint32 a = s[0], b = s[1], c = s[2], d = s[3];
141	uint32 e = s[4], f = s[5], g = s[6], h = s[7];
142	uint32 aa, bb, cc, dd, ee, ff, gg, hh;
143	uint32 *w = k->wi;
144
145	a ^= w++; b ^= w++; c ^= w++; d ^= w++;
146	e ^= w++; f ^= w++; g ^= w++; h ^= w++;
147
148	UNDO(MIX, TI, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
149	UNDO(MIX, TI, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
150	UNDO(MIX, TI, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
151	UNDO(MIX, TI, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
152	UNDO(MIX, TI, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
153	UNDO(MIX, TI, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
154	UNDO(MIX, TI, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
155	UNDO(MIX, TI, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
156	UNDO(MIX, TI, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
157	UNDO(MIX, TI, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
158	UNDO(MIX, TI, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
159	UNDO(MIX, TI, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
160	UNDO(MIX, TI, aa, bb, cc, dd, ee, ff, gg, hh, a, b, c, d, e, f, g, h, w);
161	UNDO(SUB, SI, a, b, c, d, e, f, g, h, aa, bb, cc, dd, ee, ff, gg, hh, w);
162
163	dst[0] = a; dst[1] = b; dst[2] = c; dst[3] = d;
164	dst[4] = e; dst[5] = f; dst[6] = g; dst[7] = h;
165	}
166
167	BLKC_TEST(RIJNDAEL256, rijndael256)
168
169	/----- That's all, folks -------------------------------------------------/