3 * $Id: rijndael192.c,v 1.2 2004/04/08 01:36:15 mdw Exp $
5 * The Rijndael block cipher, 192-bit version
7 * (c) 2001 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Catacomb.
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.
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.
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,
30 /*----- Header files ------------------------------------------------------*/
35 #include <mLib/bits.h>
40 #include "rijndael192.h"
41 #include "rijndael-base.h"
43 /*----- Main code ---------------------------------------------------------*/
45 /* --- @rijndael192_init@ --- *
47 * Arguments: @rijndael_ctx *k@ = pointer to context to initialize
48 * @const void *buf@ = pointer to buffer of key material
49 * @size_t sz@ = size of the key material
53 * Use: Initializes a Rijndael context with a particular key. This
54 * implementation of Rijndael doesn't impose any particular
55 * limits on the key size except that it must be multiple of 4
56 * bytes long. 256 bits seems sensible, though.
59 void rijndael192_init(rijndael_ctx *k, const void *buf, size_t sz)
61 rijndael_setup(k, RIJNDAEL192_BLKSZ / 4, buf, sz);
64 /* --- @rijndael192_eblk@, @rijndael192_dblk@ --- *
66 * Arguments: @const rijndael_ctx *k@ = pointer to Rijndael context
67 * @const uint32 s[4]@ = pointer to source block
68 * @uint32 d[4]@ = pointer to destination block
72 * Use: Low-level block encryption and decryption.
75 #define DO(what, t, aa, bb, cc, dd, ee, ff, a, b, c, d, e, f, w) do { \
76 aa = what(t, a, b, c, d) ^ *w++; \
77 bb = what(t, b, c, d, e) ^ *w++; \
78 cc = what(t, c, d, e, f) ^ *w++; \
79 dd = what(t, d, e, f, a) ^ *w++; \
80 ee = what(t, e, f, a, b) ^ *w++; \
81 ff = what(t, f, a, b, c) ^ *w++; \
84 #define UNDO(what, t, aa, bb, cc, dd, ee, ff, a, b, c, d, e, f, w) do { \
85 aa = what(t, a, f, e, d) ^ *w++; \
86 bb = what(t, b, a, f, e) ^ *w++; \
87 cc = what(t, c, b, a, f) ^ *w++; \
88 dd = what(t, d, c, b, a) ^ *w++; \
89 ee = what(t, e, d, c, b) ^ *w++; \
90 ff = what(t, f, e, d, c) ^ *w++; \
93 void rijndael192_eblk(const rijndael_ctx *k, const uint32 *s, uint32 *dst)
95 uint32 a = s[0], b = s[1], c = s[2], d = s[3], e = s[4], f = s[5];
96 uint32 aa, bb, cc, dd, ee, ff;
99 a ^= *w++; b ^= *w++; c ^= *w++; d ^= *w++; e ^= *w++; f ^= *w++;
100 aa = a; bb = b; cc = c; dd = d; ee = e; ff = f;
104 DO(MIX, T, aa, bb, cc, dd, ee, ff, a, b, c, d, e, f, w);
106 DO(MIX, T, a, b, c, d, e, f, aa, bb, cc, dd, ee, ff, w);
109 DO(MIX, T, aa, bb, cc, dd, ee, ff, a, b, c, d, e, f, w);
110 DO(MIX, T, a, b, c, d, e, f, aa, bb, cc, dd, ee, ff, w);
111 DO(MIX, T, aa, bb, cc, dd, ee, ff, a, b, c, d, e, f, w);
112 DO(MIX, T, a, b, c, d, e, f, aa, bb, cc, dd, ee, ff, w);
113 DO(MIX, T, aa, bb, cc, dd, ee, ff, a, b, c, d, e, f, w);
114 DO(MIX, T, a, b, c, d, e, f, aa, bb, cc, dd, ee, ff, w);
115 DO(MIX, T, aa, bb, cc, dd, ee, ff, a, b, c, d, e, f, w);
116 DO(MIX, T, a, b, c, d, e, f, aa, bb, cc, dd, ee, ff, w);
117 DO(MIX, T, aa, bb, cc, dd, ee, ff, a, b, c, d, e, f, w);
118 DO(MIX, T, a, b, c, d, e, f, aa, bb, cc, dd, ee, ff, w);
119 DO(MIX, T, aa, bb, cc, dd, ee, ff, a, b, c, d, e, f, w);
121 DO(SUB, S, a, b, c, d, e, f, aa, bb, cc, dd, ee, ff, w);
123 dst[0] = a; dst[1] = b; dst[2] = c; dst[3] = d; dst[4] = e; dst[5] = f;
126 void rijndael192_dblk(const rijndael_ctx *k, const uint32 *s, uint32 *dst)
128 uint32 a = s[0], b = s[1], c = s[2], d = s[3], e = s[4], f = s[5];
129 uint32 aa, bb, cc, dd, ee, ff;
132 a ^= *w++; b ^= *w++; c ^= *w++; d ^= *w++; e ^= *w++; f ^= *w++;
133 aa = a; bb = b; cc = c; dd = d; ee = e; ff = f;
137 UNDO(MIX, TI, aa, bb, cc, dd, ee, ff, a, b, c, d, e, f, w);
139 UNDO(MIX, TI, a, b, c, d, e, f, aa, bb, cc, dd, ee, ff, w);
142 UNDO(MIX, TI, aa, bb, cc, dd, ee, ff, a, b, c, d, e, f, w);
143 UNDO(MIX, TI, a, b, c, d, e, f, aa, bb, cc, dd, ee, ff, w);
144 UNDO(MIX, TI, aa, bb, cc, dd, ee, ff, a, b, c, d, e, f, w);
145 UNDO(MIX, TI, a, b, c, d, e, f, aa, bb, cc, dd, ee, ff, w);
146 UNDO(MIX, TI, aa, bb, cc, dd, ee, ff, a, b, c, d, e, f, w);
147 UNDO(MIX, TI, a, b, c, d, e, f, aa, bb, cc, dd, ee, ff, w);
148 UNDO(MIX, TI, aa, bb, cc, dd, ee, ff, a, b, c, d, e, f, w);
149 UNDO(MIX, TI, a, b, c, d, e, f, aa, bb, cc, dd, ee, ff, w);
150 UNDO(MIX, TI, aa, bb, cc, dd, ee, ff, a, b, c, d, e, f, w);
151 UNDO(MIX, TI, a, b, c, d, e, f, aa, bb, cc, dd, ee, ff, w);
152 UNDO(MIX, TI, aa, bb, cc, dd, ee, ff, a, b, c, d, e, f, w);
154 UNDO(SUB, SI, a, b, c, d, e, f, aa, bb, cc, dd, ee, ff, w);
156 dst[0] = a; dst[1] = b; dst[2] = c; dst[3] = d; dst[4] = e; dst[5] = f;
159 BLKC_TEST(RIJNDAEL192, rijndael192)
161 /*----- That's all, folks -------------------------------------------------*/