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
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
/*
* SM3 secure hash, as specified by OSCCA GM/T 0004-2012 SM3 and
* described at https://tools.ietf.org/html/draft-shen-sm3-hash-01
*
* Copyright (C) 2017 ARM Limited or its affiliates.
* Written by Gilad Ben-Yossef <gilad@benyossef.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <crypto/internal/hash.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/types.h>
#include <crypto/sm3.h>
#include <crypto/sm3_base.h>
#include <linux/bitops.h>
#include <asm/byteorder.h>
#include <asm/unaligned.h>
const u8 sm3_zero_message_hash[SM3_DIGEST_SIZE] = {
0x1A, 0xB2, 0x1D, 0x83, 0x55, 0xCF, 0xA1, 0x7F,
0x8e, 0x61, 0x19, 0x48, 0x31, 0xE8, 0x1A, 0x8F,
0x22, 0xBE, 0xC8, 0xC7, 0x28, 0xFE, 0xFB, 0x74,
0x7E, 0xD0, 0x35, 0xEB, 0x50, 0x82, 0xAA, 0x2B
};
EXPORT_SYMBOL_GPL(sm3_zero_message_hash);
static inline u32 p0(u32 x)
{
return x ^ rol32(x, 9) ^ rol32(x, 17);
}
static inline u32 p1(u32 x)
{
return x ^ rol32(x, 15) ^ rol32(x, 23);
}
static inline u32 ff(unsigned int n, u32 a, u32 b, u32 c)
{
return (n < 16) ? (a ^ b ^ c) : ((a & b) | (a & c) | (b & c));
}
static inline u32 gg(unsigned int n, u32 e, u32 f, u32 g)
{
return (n < 16) ? (e ^ f ^ g) : ((e & f) | ((~e) & g));
}
static inline u32 t(unsigned int n)
{
return (n < 16) ? SM3_T1 : SM3_T2;
}
static void sm3_expand(u32 *t, u32 *w, u32 *wt)
{
int i;
unsigned int tmp;
/* load the input */
for (i = 0; i <= 15; i++)
w[i] = get_unaligned_be32((__u32 *)t + i);
for (i = 16; i <= 67; i++) {
tmp = w[i - 16] ^ w[i - 9] ^ rol32(w[i - 3], 15);
w[i] = p1(tmp) ^ (rol32(w[i - 13], 7)) ^ w[i - 6];
}
for (i = 0; i <= 63; i++)
wt[i] = w[i] ^ w[i + 4];
}
static void sm3_compress(u32 *w, u32 *wt, u32 *m)
{
u32 ss1;
u32 ss2;
u32 tt1;
u32 tt2;
u32 a, b, c, d, e, f, g, h;
int i;
a = m[0];
b = m[1];
c = m[2];
d = m[3];
e = m[4];
f = m[5];
g = m[6];
h = m[7];
for (i = 0; i <= 63; i++) {
ss1 = rol32((rol32(a, 12) + e + rol32(t(i), i & 31)), 7);
ss2 = ss1 ^ rol32(a, 12);
tt1 = ff(i, a, b, c) + d + ss2 + *wt;
wt++;
tt2 = gg(i, e, f, g) + h + ss1 + *w;
w++;
d = c;
c = rol32(b, 9);
b = a;
a = tt1;
h = g;
g = rol32(f, 19);
f = e;
e = p0(tt2);
}
m[0] = a ^ m[0];
m[1] = b ^ m[1];
m[2] = c ^ m[2];
m[3] = d ^ m[3];
m[4] = e ^ m[4];
m[5] = f ^ m[5];
m[6] = g ^ m[6];
m[7] = h ^ m[7];
a = b = c = d = e = f = g = h = ss1 = ss2 = tt1 = tt2 = 0;
}
static void sm3_transform(struct sm3_state *sst, u8 const *src)
{
unsigned int w[68];
unsigned int wt[64];
sm3_expand((u32 *)src, w, wt);
sm3_compress(w, wt, sst->state);
memzero_explicit(w, sizeof(w));
memzero_explicit(wt, sizeof(wt));
}
static void sm3_generic_block_fn(struct sm3_state *sst, u8 const *src,
int blocks)
{
while (blocks--) {
sm3_transform(sst, src);
src += SM3_BLOCK_SIZE;
}
}
int crypto_sm3_update(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
return sm3_base_do_update(desc, data, len, sm3_generic_block_fn);
}
EXPORT_SYMBOL(crypto_sm3_update);
static int sm3_final(struct shash_desc *desc, u8 *out)
{
sm3_base_do_finalize(desc, sm3_generic_block_fn);
return sm3_base_finish(desc, out);
}
int crypto_sm3_finup(struct shash_desc *desc, const u8 *data,
unsigned int len, u8 *hash)
{
sm3_base_do_update(desc, data, len, sm3_generic_block_fn);
return sm3_final(desc, hash);
}
EXPORT_SYMBOL(crypto_sm3_finup);
static struct shash_alg sm3_alg = {
.digestsize = SM3_DIGEST_SIZE,
.init = sm3_base_init,
.update = crypto_sm3_update,
.final = sm3_final,
.finup = crypto_sm3_finup,
.descsize = sizeof(struct sm3_state),
.base = {
.cra_name = "sm3",
.cra_driver_name = "sm3-generic",
.cra_blocksize = SM3_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
};
static int __init sm3_generic_mod_init(void)
{
return crypto_register_shash(&sm3_alg);
}
static void __exit sm3_generic_mod_fini(void)
{
crypto_unregister_shash(&sm3_alg);
}
subsys_initcall(sm3_generic_mod_init);
module_exit(sm3_generic_mod_fini);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("SM3 Secure Hash Algorithm");
MODULE_ALIAS_CRYPTO("sm3");
MODULE_ALIAS_CRYPTO("sm3-generic");
|
