1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
/* camellia-crypt-internal.c
*
* Copyright (C) 2006,2007
* NTT (Nippon Telegraph and Telephone Corporation).
*
* Copyright (C) 2010 Niels Möller
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* Algorithm Specification
* http://info.isl.ntt.co.jp/crypt/eng/camellia/specifications.html
*/
/* Based on camellia.c ver 1.2.0, see
http://info.isl.ntt.co.jp/crypt/eng/camellia/dl/camellia-LGPL-1.2.0.tar.gz.
*/
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include <assert.h>
#include <limits.h>
#include "camellia-internal.h"
#include "macros.h"
#define CAMELLIA_FL(x, k) do { \
uint32_t __xl, __xr, __kl, __kr, __t; \
__xl = (x) >> 32; \
__xr = (x) & 0xffffffff; \
__kl = (k) >> 32; \
__kr = (k) & 0xffffffff; \
__t = __xl & __kl; \
__xr ^= ROL32(1, __t); \
__xl ^= (__xr | __kr); \
(x) = ((uint64_t) __xl << 32) | __xr; \
} while (0)
#define CAMELLIA_FLINV(x, k) do { \
uint32_t __xl, __xr, __kl, __kr, __t; \
__xl = (x) >> 32; \
__xr = (x) & 0xffffffff; \
__kl = (k) >> 32; \
__kr = (k) & 0xffffffff; \
__xl ^= (__xr | __kr); \
__t = __xl & __kl; \
__xr ^= ROL32(1, __t); \
(x) = ((uint64_t) __xl << 32) | __xr; \
} while (0)
#if HAVE_NATIVE_64_BIT
#define CAMELLIA_ROUNDSM(T, x, k, y) do { \
uint32_t __il, __ir; \
__ir \
= T->sp1110[(x) & 0xff] \
^ T->sp0222[((x) >> 24) & 0xff] \
^ T->sp3033[((x) >> 16) & 0xff] \
^ T->sp4404[((x) >> 8) & 0xff]; \
/* ir == (t6^t7^t8),(t5^t7^t8),(t5^t6^t8),(t5^t6^t7) */ \
__il \
= T->sp1110[ (x) >> 56] \
^ T->sp0222[((x) >> 48) & 0xff] \
^ T->sp3033[((x) >> 40) & 0xff] \
^ T->sp4404[((x) >> 32) & 0xff]; \
/* il == (t1^t3^t4),(t1^t2^t4),(t1^t2^t3),(t2^t3^t4) */ \
__ir ^= __il; \
/* ir == (t1^t3^t4^t6^t7^t8),(t1^t2^t4^t5^t7^t8), \
(t1^t2^t3^t5^t6^t8),(t2^t3^t4^t5^t6^t7) \
== y1,y2,y3,y4 */ \
__il = ROL32(24, __il); \
/* il == (t2^t3^t4),(t1^t3^t4),(t1^t2^t4),(t1^t2^t3) */ \
__il ^= __ir; \
/* il == (t1^t2^t6^t7^t8),(t2^t3^t5^t7^t8), \
(t3^t4^t5^t6^t8),(t1^t4^t5^t6^t7) \
== y5,y6,y7,y8 */ \
y ^= (k); \
y ^= ((uint64_t) __ir << 32) | __il; \
} while (0)
#else /* !HAVE_NATIVE_64_BIT */
#define CAMELLIA_ROUNDSM(T, x, k, y) do { \
uint32_t __il, __ir; \
__ir \
= T->sp1110[(x) & 0xff] \
^ T->sp0222[((x) >> 24) & 0xff] \
^ T->sp3033[((x) >> 16) & 0xff] \
^ T->sp4404[((x) >> 8) & 0xff]; \
/* ir == (t6^t7^t8),(t5^t7^t8),(t5^t6^t8),(t5^t6^t7) */ \
__il \
= T->sp1110[ (x) >> 56] \
^ T->sp0222[((x) >> 48) & 0xff] \
^ T->sp3033[((x) >> 40) & 0xff] \
^ T->sp4404[((x) >> 32) & 0xff]; \
/* il == (t1^t3^t4),(t1^t2^t4),(t1^t2^t3),(t2^t3^t4) */ \
__il ^= (k) >> 32; \
__ir ^= (k) & 0xffffffff; \
__ir ^= __il; \
/* ir == (t1^t3^t4^t6^t7^t8),(t1^t2^t4^t5^t7^t8), \
(t1^t2^t3^t5^t6^t8),(t2^t3^t4^t5^t6^t7) \
== y1,y2,y3,y4 */ \
__il = ROL32(24, __il); \
/* il == (t2^t3^t4),(t1^t3^t4),(t1^t2^t4),(t1^t2^t3) */ \
__il ^= __ir; \
/* il == (t1^t2^t6^t7^t8),(t2^t3^t5^t7^t8), \
(t3^t4^t5^t6^t8),(t1^t4^t5^t6^t7) \
== y5,y6,y7,y8 */ \
y ^= ((uint64_t) __ir << 32) | __il; \
} while (0)
#endif
void
_camellia_crypt(const struct camellia_ctx *ctx,
const struct camellia_table *T,
unsigned length, uint8_t *dst,
const uint8_t *src)
{
FOR_BLOCKS(length, dst, src, CAMELLIA_BLOCK_SIZE)
{
uint64_t i0,i1;
unsigned i;
i0 = READ_UINT64(src);
i1 = READ_UINT64(src + 8);
/* pre whitening but absorb kw2*/
i0 ^= ctx->keys[0];
/* main iteration */
CAMELLIA_ROUNDSM(T, i0,ctx->keys[1], i1);
CAMELLIA_ROUNDSM(T, i1,ctx->keys[2], i0);
CAMELLIA_ROUNDSM(T, i0,ctx->keys[3], i1);
CAMELLIA_ROUNDSM(T, i1,ctx->keys[4], i0);
CAMELLIA_ROUNDSM(T, i0,ctx->keys[5], i1);
CAMELLIA_ROUNDSM(T, i1,ctx->keys[6], i0);
for (i = 0; i < ctx->nkeys - 8; i+= 8)
{
CAMELLIA_FL(i0, ctx->keys[i+7]);
CAMELLIA_FLINV(i1, ctx->keys[i+8]);
CAMELLIA_ROUNDSM(T, i0,ctx->keys[i+9], i1);
CAMELLIA_ROUNDSM(T, i1,ctx->keys[i+10], i0);
CAMELLIA_ROUNDSM(T, i0,ctx->keys[i+11], i1);
CAMELLIA_ROUNDSM(T, i1,ctx->keys[i+12], i0);
CAMELLIA_ROUNDSM(T, i0,ctx->keys[i+13], i1);
CAMELLIA_ROUNDSM(T, i1,ctx->keys[i+14], i0);
}
/* post whitening but kw4 */
i1 ^= ctx->keys[i+7];
WRITE_UINT64(dst , i1);
WRITE_UINT64(dst + 8, i0);
}
}
|