3 * The Rijndael block cipher, 256-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 "rijndael256.h"
39 #include "rijndael-base.h"
41 /*----- Main code ---------------------------------------------------------*/
43 /* --- @rijndael256_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 rijndael256_init(rijndael_ctx
*k
, const void *buf
, size_t sz
)
59 rijndael_setup(k
, RIJNDAEL256_BLKSZ
/ 4, buf
, sz
);
62 /* --- @rijndael256_eblk@, @rijndael256_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.
74 aa, bb, cc, dd, ee, ff, gg, hh, \
75 a, b, c, d, e, f, g, h, w) do { \
76 aa = what(t, a, b, d, e) ^ *w++; \
77 bb = what(t, b, c, e, f) ^ *w++; \
78 cc = what(t, c, d, f, g) ^ *w++; \
79 dd = what(t, d, e, g, h) ^ *w++; \
80 ee = what(t, e, f, h, a) ^ *w++; \
81 ff = what(t, f, g, a, b) ^ *w++; \
82 gg = what(t, g, h, b, c) ^ *w++; \
83 hh = what(t, h, a, c, d) ^ *w++; \
86 #define UNDO(what, t, \
87 aa, bb, cc, dd, ee, ff, gg, hh, \
88 a, b, c, d, e, f, g, h, w) do { \
89 aa = what(t, a, h, f, e) ^ *w++; \
90 bb = what(t, b, a, g, f) ^ *w++; \
91 cc = what(t, c, b, h, g) ^ *w++; \
92 dd = what(t, d, c, a, h) ^ *w++; \
93 ee = what(t, e, d, b, a) ^ *w++; \
94 ff = what(t, f, e, c, b) ^ *w++; \
95 gg = what(t, g, f, d, c) ^ *w++; \
96 hh = what(t, h, g, e, d) ^ *w++; \
99 void rijndael256_eblk(const rijndael_ctx
*k
, const uint32
*s
, uint32
*dst
)
101 uint32 a
= s
[0], b
= s
[1], c
= s
[2], d
= s
[3];
102 uint32 e
= s
[4], f
= s
[5], g
= s
[6], h
= s
[7];
103 uint32 aa
, bb
, cc
, dd
, ee
, ff
, gg
, hh
;
104 const uint32
*w
= k
->w
;
106 a
^= *w
++; b
^= *w
++; c
^= *w
++; d
^= *w
++;
107 e
^= *w
++; f
^= *w
++; g
^= *w
++; h
^= *w
++;
109 DO(MIX
, T
, aa
, bb
, cc
, dd
, ee
, ff
, gg
, hh
, a
, b
, c
, d
, e
, f
, g
, h
, w
);
110 DO(MIX
, T
, a
, b
, c
, d
, e
, f
, g
, h
, aa
, bb
, cc
, dd
, ee
, ff
, gg
, hh
, w
);
111 DO(MIX
, T
, aa
, bb
, cc
, dd
, ee
, ff
, gg
, hh
, a
, b
, c
, d
, e
, f
, g
, h
, w
);
112 DO(MIX
, T
, a
, b
, c
, d
, e
, f
, g
, h
, aa
, bb
, cc
, dd
, ee
, ff
, gg
, hh
, w
);
113 DO(MIX
, T
, aa
, bb
, cc
, dd
, ee
, ff
, gg
, hh
, a
, b
, c
, d
, e
, f
, g
, h
, w
);
114 DO(MIX
, T
, a
, b
, c
, d
, e
, f
, g
, h
, aa
, bb
, cc
, dd
, ee
, ff
, gg
, hh
, w
);
115 DO(MIX
, T
, aa
, bb
, cc
, dd
, ee
, ff
, gg
, hh
, a
, b
, c
, d
, e
, f
, g
, h
, w
);
116 DO(MIX
, T
, a
, b
, c
, d
, e
, f
, g
, h
, aa
, bb
, cc
, dd
, ee
, ff
, gg
, hh
, w
);
117 DO(MIX
, T
, aa
, bb
, cc
, dd
, ee
, ff
, gg
, hh
, a
, b
, c
, d
, e
, f
, g
, h
, w
);
118 DO(MIX
, T
, a
, b
, c
, d
, e
, f
, g
, h
, aa
, bb
, cc
, dd
, ee
, ff
, gg
, hh
, 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(SUB
, S
, a
, b
, c
, d
, e
, f
, g
, h
, aa
, bb
, cc
, dd
, ee
, ff
, gg
, hh
, w
);
124 dst
[0] = a
; dst
[1] = b
; dst
[2] = c
; dst
[3] = d
;
125 dst
[4] = e
; dst
[5] = f
; dst
[6] = g
; dst
[7] = h
;
128 void rijndael256_dblk(const rijndael_ctx
*k
, const uint32
*s
, uint32
*dst
)
130 uint32 a
= s
[0], b
= s
[1], c
= s
[2], d
= s
[3];
131 uint32 e
= s
[4], f
= s
[5], g
= s
[6], h
= s
[7];
132 uint32 aa
, bb
, cc
, dd
, ee
, ff
, gg
, hh
;
133 const uint32
*w
= k
->wi
;
135 a
^= *w
++; b
^= *w
++; c
^= *w
++; d
^= *w
++;
136 e
^= *w
++; f
^= *w
++; g
^= *w
++; h
^= *w
++;
138 UNDO(MIX
, TI
, aa
, bb
, cc
, dd
, ee
, ff
, gg
, hh
, a
, b
, c
, d
, e
, f
, g
, h
, w
);
139 UNDO(MIX
, TI
, a
, b
, c
, d
, e
, f
, g
, h
, aa
, bb
, cc
, dd
, ee
, ff
, gg
, hh
, w
);
140 UNDO(MIX
, TI
, aa
, bb
, cc
, dd
, ee
, ff
, gg
, hh
, a
, b
, c
, d
, e
, f
, g
, h
, w
);
141 UNDO(MIX
, TI
, a
, b
, c
, d
, e
, f
, g
, h
, aa
, bb
, cc
, dd
, ee
, ff
, gg
, hh
, w
);
142 UNDO(MIX
, TI
, aa
, bb
, cc
, dd
, ee
, ff
, gg
, hh
, a
, b
, c
, d
, e
, f
, g
, h
, w
);
143 UNDO(MIX
, TI
, a
, b
, c
, d
, e
, f
, g
, h
, aa
, bb
, cc
, dd
, ee
, ff
, gg
, hh
, w
);
144 UNDO(MIX
, TI
, aa
, bb
, cc
, dd
, ee
, ff
, gg
, hh
, a
, b
, c
, d
, e
, f
, g
, h
, w
);
145 UNDO(MIX
, TI
, a
, b
, c
, d
, e
, f
, g
, h
, aa
, bb
, cc
, dd
, ee
, ff
, gg
, hh
, w
);
146 UNDO(MIX
, TI
, aa
, bb
, cc
, dd
, ee
, ff
, gg
, hh
, a
, b
, c
, d
, e
, f
, g
, h
, w
);
147 UNDO(MIX
, TI
, a
, b
, c
, d
, e
, f
, g
, h
, aa
, bb
, cc
, dd
, ee
, ff
, gg
, hh
, 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(SUB
, SI
, a
, b
, c
, d
, e
, f
, g
, h
, aa
, bb
, cc
, dd
, ee
, ff
, gg
, hh
, w
);
153 dst
[0] = a
; dst
[1] = b
; dst
[2] = c
; dst
[3] = d
;
154 dst
[4] = e
; dst
[5] = f
; dst
[6] = g
; dst
[7] = h
;
157 BLKC_TEST(RIJNDAEL256
, rijndael256
)
159 /*----- That's all, folks -------------------------------------------------*/