3 * The Rijndael block cipher
5 * (c) 2000 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 ------------------------------------------------------*/
35 #include <mLib/bits.h>
41 #include "rijndael-base.h"
43 /*----- Main code ---------------------------------------------------------*/
45 /* --- @rijndael_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 rijndael_init(rijndael_ctx
*k
, const void *buf
, size_t sz
)
61 rijndael_setup(k
, RIJNDAEL_BLKSZ
/ 4, buf
, sz
);
64 /* --- @rijndael_eblk@, @rijndael_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 CPU_DISPATCH(EMPTY
, EMPTY
, void, rijndael_eblk
,
76 (const rijndael_ctx
*k
, const uint32 s
[4], uint32 d
[4]),
77 (k
, s
, d
), pick_eblk
, simple_eblk
)
79 CPU_DISPATCH(EMPTY
, EMPTY
, void, rijndael_dblk
,
80 (const rijndael_ctx
*k
, const uint32 s
[4], uint32 d
[4]),
81 (k
, s
, d
), pick_dblk
, simple_dblk
)
83 #if CPUFAM_X86 || CPUFAM_AMD64
84 extern rijndael_eblk__functype rijndael_eblk_x86ish_aesni
;
85 extern rijndael_dblk__functype rijndael_dblk_x86ish_aesni
;
87 #if CPUFAM_ARMEL && HAVE_AS_ARMV8_CRYPTO
88 extern rijndael_eblk__functype rijndael_eblk_arm_crypto
;
89 extern rijndael_dblk__functype rijndael_dblk_arm_crypto
;
92 extern rijndael_eblk__functype rijndael_eblk_arm64_crypto
;
93 extern rijndael_dblk__functype rijndael_dblk_arm64_crypto
;
96 static rijndael_eblk__functype
*pick_eblk(void)
98 #if CPUFAM_X86 || CPUFAM_AMD64
99 DISPATCH_PICK_COND(rijndael_eblk
, rijndael_eblk_x86ish_aesni
,
100 cpu_feature_p(CPUFEAT_X86_AESNI
));
102 #if CPUFAM_ARMEL && HAVE_AS_ARMV8_CRYPTO
103 DISPATCH_PICK_COND(rijndael_eblk
, rijndael_eblk_arm_crypto
,
104 cpu_feature_p(CPUFEAT_ARM_AES
));
107 DISPATCH_PICK_COND(rijndael_eblk
, rijndael_eblk_arm64_crypto
,
108 cpu_feature_p(CPUFEAT_ARM_AES
));
110 DISPATCH_PICK_FALLBACK(rijndael_eblk
, simple_eblk
);
113 static rijndael_dblk__functype
*pick_dblk(void)
115 #if CPUFAM_X86 || CPUFAM_AMD64
116 DISPATCH_PICK_COND(rijndael_dblk
, rijndael_dblk_x86ish_aesni
,
117 cpu_feature_p(CPUFEAT_X86_AESNI
));
119 #if CPUFAM_ARMEL && HAVE_AS_ARMV8_CRYPTO
120 DISPATCH_PICK_COND(rijndael_dblk
, rijndael_dblk_arm_crypto
,
121 cpu_feature_p(CPUFEAT_ARM_AES
));
124 DISPATCH_PICK_COND(rijndael_dblk
, rijndael_dblk_arm64_crypto
,
125 cpu_feature_p(CPUFEAT_ARM_AES
));
127 DISPATCH_PICK_FALLBACK(rijndael_dblk
, simple_dblk
);
130 #define DO(what, t, aa, bb, cc, dd, a, b, c, d, w) do { \
131 aa = what(t, a, b, c, d) ^ *w++; \
132 bb = what(t, b, c, d, a) ^ *w++; \
133 cc = what(t, c, d, a, b) ^ *w++; \
134 dd = what(t, d, a, b, c) ^ *w++; \
137 #define UNDO(what, t, aa, bb, cc, dd, a, b, c, d, w) do { \
138 aa = what(t, a, d, c, b) ^ *w++; \
139 bb = what(t, b, a, d, c) ^ *w++; \
140 cc = what(t, c, b, a, d) ^ *w++; \
141 dd = what(t, d, c, b, a) ^ *w++; \
144 static void simple_eblk(const rijndael_ctx
*k
, const uint32
*s
, uint32
*dst
)
146 uint32 a
= s
[0], b
= s
[1], c
= s
[2], d
= s
[3];
147 uint32 aa
, bb
, cc
, dd
;
148 const uint32
*w
= k
->w
;
150 a
^= *w
++; b
^= *w
++; c
^= *w
++; d
^= *w
++;
151 aa
= a
; bb
= b
; cc
= c
; dd
= d
;
155 DO(MIX
, T
, aa
, bb
, cc
, dd
, a
, b
, c
, d
, w
);
157 DO(MIX
, T
, a
, b
, c
, d
, aa
, bb
, cc
, dd
, w
);
159 DO(MIX
, T
, aa
, bb
, cc
, dd
, a
, b
, c
, d
, w
);
161 DO(MIX
, T
, a
, b
, c
, d
, aa
, bb
, cc
, dd
, w
);
164 DO(MIX
, T
, aa
, bb
, cc
, dd
, a
, b
, c
, d
, w
);
165 DO(MIX
, T
, a
, b
, c
, d
, aa
, bb
, cc
, dd
, w
);
166 DO(MIX
, T
, aa
, bb
, cc
, dd
, a
, b
, c
, d
, w
);
167 DO(MIX
, T
, a
, b
, c
, d
, aa
, bb
, cc
, dd
, w
);
168 DO(MIX
, T
, aa
, bb
, cc
, dd
, a
, b
, c
, d
, w
);
169 DO(MIX
, T
, a
, b
, c
, d
, aa
, bb
, cc
, dd
, w
);
170 DO(MIX
, T
, aa
, bb
, cc
, dd
, a
, b
, c
, d
, w
);
171 DO(MIX
, T
, a
, b
, c
, d
, aa
, bb
, cc
, dd
, w
);
172 DO(MIX
, T
, aa
, bb
, cc
, dd
, a
, b
, c
, d
, w
);
174 DO(SUB
, S
, a
, b
, c
, d
, aa
, bb
, cc
, dd
, w
);
176 dst
[0] = a
; dst
[1] = b
; dst
[2] = c
; dst
[3] = d
;
179 static void simple_dblk(const rijndael_ctx
*k
, const uint32
*s
, uint32
*dst
)
181 uint32 a
= s
[0], b
= s
[1], c
= s
[2], d
= s
[3];
182 uint32 aa
, bb
, cc
, dd
;
183 const uint32
*w
= k
->wi
;
185 a
^= *w
++; b
^= *w
++; c
^= *w
++; d
^= *w
++;
186 aa
= a
; bb
= b
; cc
= c
; dd
= d
;
190 UNDO(MIX
, TI
, aa
, bb
, cc
, dd
, a
, b
, c
, d
, w
);
192 UNDO(MIX
, TI
, a
, b
, c
, d
, aa
, bb
, cc
, dd
, w
);
194 UNDO(MIX
, TI
, aa
, bb
, cc
, dd
, a
, b
, c
, d
, w
);
196 UNDO(MIX
, TI
, a
, b
, c
, d
, aa
, bb
, cc
, dd
, w
);
199 UNDO(MIX
, TI
, aa
, bb
, cc
, dd
, a
, b
, c
, d
, w
);
200 UNDO(MIX
, TI
, a
, b
, c
, d
, aa
, bb
, cc
, dd
, w
);
201 UNDO(MIX
, TI
, aa
, bb
, cc
, dd
, a
, b
, c
, d
, w
);
202 UNDO(MIX
, TI
, a
, b
, c
, d
, aa
, bb
, cc
, dd
, w
);
203 UNDO(MIX
, TI
, aa
, bb
, cc
, dd
, a
, b
, c
, d
, w
);
204 UNDO(MIX
, TI
, a
, b
, c
, d
, aa
, bb
, cc
, dd
, w
);
205 UNDO(MIX
, TI
, aa
, bb
, cc
, dd
, a
, b
, c
, d
, w
);
206 UNDO(MIX
, TI
, a
, b
, c
, d
, aa
, bb
, cc
, dd
, w
);
207 UNDO(MIX
, TI
, aa
, bb
, cc
, dd
, a
, b
, c
, d
, w
);
209 UNDO(SUB
, SI
, a
, b
, c
, d
, aa
, bb
, cc
, dd
, w
);
211 dst
[0] = a
; dst
[1] = b
; dst
[2] = c
; dst
[3] = d
;
214 BLKC_TEST(RIJNDAEL
, rijndael
)
216 /*----- That's all, folks -------------------------------------------------*/