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
|
// SPDX-License-Identifier: (GPL-2.0-only OR Apache-2.0)
/*
* Generic implementation of the BLAKE2b digest algorithm. Based on the BLAKE2b
* reference implementation, but it has been heavily modified for use in the
* kernel. The reference implementation was:
*
* Copyright 2012, Samuel Neves <sneves@dei.uc.pt>. You may use this under
* the terms of the CC0, the OpenSSL Licence, or the Apache Public License
* 2.0, at your option. The terms of these licenses can be found at:
*
* - CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
* - OpenSSL license : https://www.openssl.org/source/license.html
* - Apache 2.0 : https://www.apache.org/licenses/LICENSE-2.0
*
* More information about BLAKE2 can be found at https://blake2.net.
*/
#include <asm/unaligned.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/bitops.h>
#include <crypto/internal/blake2b.h>
#include <crypto/internal/hash.h>
static const u8 blake2b_sigma[12][16] = {
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
{ 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3 },
{ 11, 8, 12, 0, 5, 2, 15, 13, 10, 14, 3, 6, 7, 1, 9, 4 },
{ 7, 9, 3, 1, 13, 12, 11, 14, 2, 6, 5, 10, 4, 0, 15, 8 },
{ 9, 0, 5, 7, 2, 4, 10, 15, 14, 1, 11, 12, 6, 8, 3, 13 },
{ 2, 12, 6, 10, 0, 11, 8, 3, 4, 13, 7, 5, 15, 14, 1, 9 },
{ 12, 5, 1, 15, 14, 13, 4, 10, 0, 7, 6, 3, 9, 2, 8, 11 },
{ 13, 11, 7, 14, 12, 1, 3, 9, 5, 0, 15, 4, 8, 6, 2, 10 },
{ 6, 15, 14, 9, 11, 3, 0, 8, 12, 2, 13, 7, 1, 4, 10, 5 },
{ 10, 2, 8, 4, 7, 6, 1, 5, 15, 11, 9, 14, 3, 12, 13, 0 },
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
{ 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3 }
};
static void blake2b_increment_counter(struct blake2b_state *S, const u64 inc)
{
S->t[0] += inc;
S->t[1] += (S->t[0] < inc);
}
#define G(r,i,a,b,c,d) \
do { \
a = a + b + m[blake2b_sigma[r][2*i+0]]; \
d = ror64(d ^ a, 32); \
c = c + d; \
b = ror64(b ^ c, 24); \
a = a + b + m[blake2b_sigma[r][2*i+1]]; \
d = ror64(d ^ a, 16); \
c = c + d; \
b = ror64(b ^ c, 63); \
} while (0)
#define ROUND(r) \
do { \
G(r,0,v[ 0],v[ 4],v[ 8],v[12]); \
G(r,1,v[ 1],v[ 5],v[ 9],v[13]); \
G(r,2,v[ 2],v[ 6],v[10],v[14]); \
G(r,3,v[ 3],v[ 7],v[11],v[15]); \
G(r,4,v[ 0],v[ 5],v[10],v[15]); \
G(r,5,v[ 1],v[ 6],v[11],v[12]); \
G(r,6,v[ 2],v[ 7],v[ 8],v[13]); \
G(r,7,v[ 3],v[ 4],v[ 9],v[14]); \
} while (0)
static void blake2b_compress_one_generic(struct blake2b_state *S,
const u8 block[BLAKE2B_BLOCK_SIZE])
{
u64 m[16];
u64 v[16];
size_t i;
for (i = 0; i < 16; ++i)
m[i] = get_unaligned_le64(block + i * sizeof(m[i]));
for (i = 0; i < 8; ++i)
v[i] = S->h[i];
v[ 8] = BLAKE2B_IV0;
v[ 9] = BLAKE2B_IV1;
v[10] = BLAKE2B_IV2;
v[11] = BLAKE2B_IV3;
v[12] = BLAKE2B_IV4 ^ S->t[0];
v[13] = BLAKE2B_IV5 ^ S->t[1];
v[14] = BLAKE2B_IV6 ^ S->f[0];
v[15] = BLAKE2B_IV7 ^ S->f[1];
ROUND(0);
ROUND(1);
ROUND(2);
ROUND(3);
ROUND(4);
ROUND(5);
ROUND(6);
ROUND(7);
ROUND(8);
ROUND(9);
ROUND(10);
ROUND(11);
#ifdef CONFIG_CC_IS_CLANG
#pragma nounroll /* https://llvm.org/pr45803 */
#endif
for (i = 0; i < 8; ++i)
S->h[i] = S->h[i] ^ v[i] ^ v[i + 8];
}
#undef G
#undef ROUND
void blake2b_compress_generic(struct blake2b_state *state,
const u8 *block, size_t nblocks, u32 inc)
{
do {
blake2b_increment_counter(state, inc);
blake2b_compress_one_generic(state, block);
block += BLAKE2B_BLOCK_SIZE;
} while (--nblocks);
}
EXPORT_SYMBOL(blake2b_compress_generic);
static int crypto_blake2b_update_generic(struct shash_desc *desc,
const u8 *in, unsigned int inlen)
{
return crypto_blake2b_update(desc, in, inlen, blake2b_compress_generic);
}
static int crypto_blake2b_final_generic(struct shash_desc *desc, u8 *out)
{
return crypto_blake2b_final(desc, out, blake2b_compress_generic);
}
#define BLAKE2B_ALG(name, driver_name, digest_size) \
{ \
.base.cra_name = name, \
.base.cra_driver_name = driver_name, \
.base.cra_priority = 100, \
.base.cra_flags = CRYPTO_ALG_OPTIONAL_KEY, \
.base.cra_blocksize = BLAKE2B_BLOCK_SIZE, \
.base.cra_ctxsize = sizeof(struct blake2b_tfm_ctx), \
.base.cra_module = THIS_MODULE, \
.digestsize = digest_size, \
.setkey = crypto_blake2b_setkey, \
.init = crypto_blake2b_init, \
.update = crypto_blake2b_update_generic, \
.final = crypto_blake2b_final_generic, \
.descsize = sizeof(struct blake2b_state), \
}
static struct shash_alg blake2b_algs[] = {
BLAKE2B_ALG("blake2b-160", "blake2b-160-generic",
BLAKE2B_160_HASH_SIZE),
BLAKE2B_ALG("blake2b-256", "blake2b-256-generic",
BLAKE2B_256_HASH_SIZE),
BLAKE2B_ALG("blake2b-384", "blake2b-384-generic",
BLAKE2B_384_HASH_SIZE),
BLAKE2B_ALG("blake2b-512", "blake2b-512-generic",
BLAKE2B_512_HASH_SIZE),
};
static int __init blake2b_mod_init(void)
{
return crypto_register_shashes(blake2b_algs, ARRAY_SIZE(blake2b_algs));
}
static void __exit blake2b_mod_fini(void)
{
crypto_unregister_shashes(blake2b_algs, ARRAY_SIZE(blake2b_algs));
}
subsys_initcall(blake2b_mod_init);
module_exit(blake2b_mod_fini);
MODULE_AUTHOR("David Sterba <kdave@kernel.org>");
MODULE_DESCRIPTION("BLAKE2b generic implementation");
MODULE_LICENSE("GPL");
MODULE_ALIAS_CRYPTO("blake2b-160");
MODULE_ALIAS_CRYPTO("blake2b-160-generic");
MODULE_ALIAS_CRYPTO("blake2b-256");
MODULE_ALIAS_CRYPTO("blake2b-256-generic");
MODULE_ALIAS_CRYPTO("blake2b-384");
MODULE_ALIAS_CRYPTO("blake2b-384-generic");
MODULE_ALIAS_CRYPTO("blake2b-512");
MODULE_ALIAS_CRYPTO("blake2b-512-generic");
|
