3 * $Id: rijndael256.c,v 1.1 2001/05/07 17:32:03 mdw Exp $
5 * The Rijndael block cipher, 256-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 /*----- Revision history --------------------------------------------------*
32 * $Log: rijndael256.c,v $
33 * Revision 1.1 2001/05/07 17:32:03 mdw
34 * New Rijndael block sizes.
38 /*----- Header files ------------------------------------------------------*/
43 #include <mLib/bits.h>
48 #include "rijndael256.h"
49 #include "rijndael-base.h"
51 /*----- Main code ---------------------------------------------------------*/
53 /* --- @rijndael256_init@ --- *
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
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.
67 void rijndael256_init(rijndael_ctx
*k
, const void *buf
, size_t sz
)
69 rijndael_setup(k
, RIJNDAEL256_BLKSZ
/ 4, buf
, sz
);
72 /* --- @rijndael256_eblk@, @rijndael256_dblk@ --- *
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
80 * Use: Low-level block encryption and decryption.
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++; \
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++; \
109 void rijndael256_eblk(const rijndael_ctx
*k
, const uint32
*s
, uint32
*dst
)
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
;
116 a
^= *w
++; b
^= *w
++; c
^= *w
++; d
^= *w
++;
117 e
^= *w
++; f
^= *w
++; g
^= *w
++; h
^= *w
++;
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
);
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
;
138 void rijndael256_dblk(const rijndael_ctx
*k
, const uint32
*s
, uint32
*dst
)
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
;
145 a
^= *w
++; b
^= *w
++; c
^= *w
++; d
^= *w
++;
146 e
^= *w
++; f
^= *w
++; g
^= *w
++; h
^= *w
++;
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
);
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
;
167 BLKC_TEST(RIJNDAEL256
, rijndael256
)
169 /*----- That's all, folks -------------------------------------------------*/