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
|
// SPDX-License-Identifier: GPL-2.0
/*
* OpenSSL/Cryptogams accelerated Poly1305 transform for MIPS
*
* Copyright (C) 2019 Linaro Ltd. <ard.biesheuvel@linaro.org>
*/
#include <asm/unaligned.h>
#include <crypto/algapi.h>
#include <crypto/internal/hash.h>
#include <crypto/internal/poly1305.h>
#include <linux/cpufeature.h>
#include <linux/crypto.h>
#include <linux/module.h>
asmlinkage void poly1305_init_mips(void *state, const u8 *key);
asmlinkage void poly1305_blocks_mips(void *state, const u8 *src, u32 len, u32 hibit);
asmlinkage void poly1305_emit_mips(void *state, u8 *digest, const u32 *nonce);
void poly1305_init_arch(struct poly1305_desc_ctx *dctx, const u8 *key)
{
poly1305_init_mips(&dctx->h, key);
dctx->s[0] = get_unaligned_le32(key + 16);
dctx->s[1] = get_unaligned_le32(key + 20);
dctx->s[2] = get_unaligned_le32(key + 24);
dctx->s[3] = get_unaligned_le32(key + 28);
dctx->buflen = 0;
}
EXPORT_SYMBOL(poly1305_init_arch);
static int mips_poly1305_init(struct shash_desc *desc)
{
struct poly1305_desc_ctx *dctx = shash_desc_ctx(desc);
dctx->buflen = 0;
dctx->rset = 0;
dctx->sset = false;
return 0;
}
static void mips_poly1305_blocks(struct poly1305_desc_ctx *dctx, const u8 *src,
u32 len, u32 hibit)
{
if (unlikely(!dctx->sset)) {
if (!dctx->rset) {
poly1305_init_mips(&dctx->h, src);
src += POLY1305_BLOCK_SIZE;
len -= POLY1305_BLOCK_SIZE;
dctx->rset = 1;
}
if (len >= POLY1305_BLOCK_SIZE) {
dctx->s[0] = get_unaligned_le32(src + 0);
dctx->s[1] = get_unaligned_le32(src + 4);
dctx->s[2] = get_unaligned_le32(src + 8);
dctx->s[3] = get_unaligned_le32(src + 12);
src += POLY1305_BLOCK_SIZE;
len -= POLY1305_BLOCK_SIZE;
dctx->sset = true;
}
if (len < POLY1305_BLOCK_SIZE)
return;
}
len &= ~(POLY1305_BLOCK_SIZE - 1);
poly1305_blocks_mips(&dctx->h, src, len, hibit);
}
static int mips_poly1305_update(struct shash_desc *desc, const u8 *src,
unsigned int len)
{
struct poly1305_desc_ctx *dctx = shash_desc_ctx(desc);
if (unlikely(dctx->buflen)) {
u32 bytes = min(len, POLY1305_BLOCK_SIZE - dctx->buflen);
memcpy(dctx->buf + dctx->buflen, src, bytes);
src += bytes;
len -= bytes;
dctx->buflen += bytes;
if (dctx->buflen == POLY1305_BLOCK_SIZE) {
mips_poly1305_blocks(dctx, dctx->buf, POLY1305_BLOCK_SIZE, 1);
dctx->buflen = 0;
}
}
if (likely(len >= POLY1305_BLOCK_SIZE)) {
mips_poly1305_blocks(dctx, src, len, 1);
src += round_down(len, POLY1305_BLOCK_SIZE);
len %= POLY1305_BLOCK_SIZE;
}
if (unlikely(len)) {
dctx->buflen = len;
memcpy(dctx->buf, src, len);
}
return 0;
}
void poly1305_update_arch(struct poly1305_desc_ctx *dctx, const u8 *src,
unsigned int nbytes)
{
if (unlikely(dctx->buflen)) {
u32 bytes = min(nbytes, POLY1305_BLOCK_SIZE - dctx->buflen);
memcpy(dctx->buf + dctx->buflen, src, bytes);
src += bytes;
nbytes -= bytes;
dctx->buflen += bytes;
if (dctx->buflen == POLY1305_BLOCK_SIZE) {
poly1305_blocks_mips(&dctx->h, dctx->buf,
POLY1305_BLOCK_SIZE, 1);
dctx->buflen = 0;
}
}
if (likely(nbytes >= POLY1305_BLOCK_SIZE)) {
unsigned int len = round_down(nbytes, POLY1305_BLOCK_SIZE);
poly1305_blocks_mips(&dctx->h, src, len, 1);
src += len;
nbytes %= POLY1305_BLOCK_SIZE;
}
if (unlikely(nbytes)) {
dctx->buflen = nbytes;
memcpy(dctx->buf, src, nbytes);
}
}
EXPORT_SYMBOL(poly1305_update_arch);
void poly1305_final_arch(struct poly1305_desc_ctx *dctx, u8 *dst)
{
if (unlikely(dctx->buflen)) {
dctx->buf[dctx->buflen++] = 1;
memset(dctx->buf + dctx->buflen, 0,
POLY1305_BLOCK_SIZE - dctx->buflen);
poly1305_blocks_mips(&dctx->h, dctx->buf, POLY1305_BLOCK_SIZE, 0);
}
poly1305_emit_mips(&dctx->h, dst, dctx->s);
*dctx = (struct poly1305_desc_ctx){};
}
EXPORT_SYMBOL(poly1305_final_arch);
static int mips_poly1305_final(struct shash_desc *desc, u8 *dst)
{
struct poly1305_desc_ctx *dctx = shash_desc_ctx(desc);
if (unlikely(!dctx->sset))
return -ENOKEY;
poly1305_final_arch(dctx, dst);
return 0;
}
static struct shash_alg mips_poly1305_alg = {
.init = mips_poly1305_init,
.update = mips_poly1305_update,
.final = mips_poly1305_final,
.digestsize = POLY1305_DIGEST_SIZE,
.descsize = sizeof(struct poly1305_desc_ctx),
.base.cra_name = "poly1305",
.base.cra_driver_name = "poly1305-mips",
.base.cra_priority = 200,
.base.cra_blocksize = POLY1305_BLOCK_SIZE,
.base.cra_module = THIS_MODULE,
};
static int __init mips_poly1305_mod_init(void)
{
return IS_REACHABLE(CONFIG_CRYPTO_HASH) ?
crypto_register_shash(&mips_poly1305_alg) : 0;
}
static void __exit mips_poly1305_mod_exit(void)
{
if (IS_REACHABLE(CONFIG_CRYPTO_HASH))
crypto_unregister_shash(&mips_poly1305_alg);
}
module_init(mips_poly1305_mod_init);
module_exit(mips_poly1305_mod_exit);
MODULE_LICENSE("GPL v2");
MODULE_ALIAS_CRYPTO("poly1305");
MODULE_ALIAS_CRYPTO("poly1305-mips");
|
