3 * The Rijndael block cipher, 192-bit version
5 * (c) 2001 Straylight/Edgeware
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of Catacomb.
12 * Catacomb is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU Library General Public License as
14 * published by the Free Software Foundation; either version 2 of the
15 * License, or (at your option) any later version.
17 * Catacomb is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU Library General Public License for more details.
22 * You should have received a copy of the GNU Library General Public
23 * License along with Catacomb; if not, write to the Free
24 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
28 /*----- Header files ------------------------------------------------------*/
33 #include <mLib/bits.h>
38 #include "rijndael192.h"
39 #include "rijndael-base.h"
41 /*----- Main code ---------------------------------------------------------*/
43 /* --- @rijndael192_init@ --- *
45 * Arguments: @rijndael_ctx *k@ = pointer to context to initialize
46 * @const void *buf@ = pointer to buffer of key material
47 * @size_t sz@ = size of the key material
51 * Use: Initializes a Rijndael context with a particular key. This
52 * implementation of Rijndael doesn't impose any particular
53 * limits on the key size except that it must be multiple of 4
54 * bytes long. 256 bits seems sensible, though.
57 void rijndael192_init(rijndael_ctx *k, const void *buf, size_t sz)
59 rijndael_setup(k, RIJNDAEL192_BLKSZ / 4, buf, sz);
62 /* --- @rijndael192_eblk@, @rijndael192_dblk@ --- *
64 * Arguments: @const rijndael_ctx *k@ = pointer to Rijndael context
65 * @const uint32 s[4]@ = pointer to source block
66 * @uint32 d[4]@ = pointer to destination block
70 * Use: Low-level block encryption and decryption.
73 #define DO(what, t, aa, bb, cc, dd, ee, ff, a, b, c, d, e, f, w) do { \
74 aa = what(t, a, b, c, d) ^ *w++; \
75 bb = what(t, b, c, d, e) ^ *w++; \
76 cc = what(t, c, d, e, f) ^ *w++; \
77 dd = what(t, d, e, f, a) ^ *w++; \
78 ee = what(t, e, f, a, b) ^ *w++; \
79 ff = what(t, f, a, b, c) ^ *w++; \
82 #define UNDO(what, t, aa, bb, cc, dd, ee, ff, a, b, c, d, e, f, w) do { \
83 aa = what(t, a, f, e, d) ^ *w++; \
84 bb = what(t, b, a, f, e) ^ *w++; \
85 cc = what(t, c, b, a, f) ^ *w++; \
86 dd = what(t, d, c, b, a) ^ *w++; \
87 ee = what(t, e, d, c, b) ^ *w++; \
88 ff = what(t, f, e, d, c) ^ *w++; \
91 void rijndael192_eblk(const rijndael_ctx *k, const uint32 *s, uint32 *dst)
93 uint32 a = s[0], b = s[1], c = s[2], d = s[3], e = s[4], f = s[5];
94 uint32 aa, bb, cc, dd, ee, ff;
95 const uint32 *w = k->w;
97 a ^= *w++; b ^= *w++; c ^= *w++; d ^= *w++; e ^= *w++; f ^= *w++;
98 aa = a; bb = b; cc = c; dd = d; ee = e; ff = f;
102 DO(MIX, T, aa, bb, cc, dd, ee, ff, a, b, c, d, e, f, w);
104 DO(MIX, T, a, b, c, d, e, f, aa, bb, cc, dd, ee, ff, w);
107 DO(MIX, T, aa, bb, cc, dd, ee, ff, a, b, c, d, e, f, w);
108 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);
119 DO(SUB, S, a, b, c, d, e, f, aa, bb, cc, dd, ee, ff, w);
121 dst[0] = a; dst[1] = b; dst[2] = c; dst[3] = d; dst[4] = e; dst[5] = f;
124 void rijndael192_dblk(const rijndael_ctx *k, const uint32 *s, uint32 *dst)
126 uint32 a = s[0], b = s[1], c = s[2], d = s[3], e = s[4], f = s[5];
127 uint32 aa, bb, cc, dd, ee, ff;
128 const uint32 *w = k->wi;
130 a ^= *w++; b ^= *w++; c ^= *w++; d ^= *w++; e ^= *w++; f ^= *w++;
131 aa = a; bb = b; cc = c; dd = d; ee = e; ff = f;
135 UNDO(MIX, TI, aa, bb, cc, dd, ee, ff, a, b, c, d, e, f, w);
137 UNDO(MIX, TI, a, b, c, d, e, f, aa, bb, cc, dd, ee, ff, w);
140 UNDO(MIX, TI, aa, bb, cc, dd, ee, ff, a, b, c, d, e, f, w);
141 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);
152 UNDO(SUB, SI, a, b, c, d, e, f, aa, bb, cc, dd, ee, ff, w);
154 dst[0] = a; dst[1] = b; dst[2] = c; dst[3] = d; dst[4] = e; dst[5] = f;
157 BLKC_TEST(RIJNDAEL192, rijndael192)
159 /*----- That's all, folks -------------------------------------------------*/