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
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* sha512-ce-glue.c - SHA-384/SHA-512 using ARMv8 Crypto Extensions
*
* Copyright (C) 2018 Linaro Ltd <ard.biesheuvel@linaro.org>
*
* 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.
*/
#include <asm/neon.h>
#include <asm/simd.h>
#include <asm/unaligned.h>
#include <crypto/internal/hash.h>
#include <crypto/sha.h>
#include <crypto/sha512_base.h>
#include <linux/cpufeature.h>
#include <linux/crypto.h>
#include <linux/module.h>
MODULE_DESCRIPTION("SHA-384/SHA-512 secure hash using ARMv8 Crypto Extensions");
MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
MODULE_LICENSE("GPL v2");
asmlinkage void sha512_ce_transform(struct sha512_state *sst, u8 const *src,
int blocks);
asmlinkage void sha512_block_data_order(u64 *digest, u8 const *src, int blocks);
static int sha512_ce_update(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
if (!may_use_simd())
return sha512_base_do_update(desc, data, len,
(sha512_block_fn *)sha512_block_data_order);
kernel_neon_begin();
sha512_base_do_update(desc, data, len,
(sha512_block_fn *)sha512_ce_transform);
kernel_neon_end();
return 0;
}
static int sha512_ce_finup(struct shash_desc *desc, const u8 *data,
unsigned int len, u8 *out)
{
if (!may_use_simd()) {
if (len)
sha512_base_do_update(desc, data, len,
(sha512_block_fn *)sha512_block_data_order);
sha512_base_do_finalize(desc,
(sha512_block_fn *)sha512_block_data_order);
return sha512_base_finish(desc, out);
}
kernel_neon_begin();
sha512_base_do_update(desc, data, len,
(sha512_block_fn *)sha512_ce_transform);
sha512_base_do_finalize(desc, (sha512_block_fn *)sha512_ce_transform);
kernel_neon_end();
return sha512_base_finish(desc, out);
}
static int sha512_ce_final(struct shash_desc *desc, u8 *out)
{
if (!may_use_simd()) {
sha512_base_do_finalize(desc,
(sha512_block_fn *)sha512_block_data_order);
return sha512_base_finish(desc, out);
}
kernel_neon_begin();
sha512_base_do_finalize(desc, (sha512_block_fn *)sha512_ce_transform);
kernel_neon_end();
return sha512_base_finish(desc, out);
}
static struct shash_alg algs[] = { {
.init = sha384_base_init,
.update = sha512_ce_update,
.final = sha512_ce_final,
.finup = sha512_ce_finup,
.descsize = sizeof(struct sha512_state),
.digestsize = SHA384_DIGEST_SIZE,
.base.cra_name = "sha384",
.base.cra_driver_name = "sha384-ce",
.base.cra_priority = 200,
.base.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.base.cra_blocksize = SHA512_BLOCK_SIZE,
.base.cra_module = THIS_MODULE,
}, {
.init = sha512_base_init,
.update = sha512_ce_update,
.final = sha512_ce_final,
.finup = sha512_ce_finup,
.descsize = sizeof(struct sha512_state),
.digestsize = SHA512_DIGEST_SIZE,
.base.cra_name = "sha512",
.base.cra_driver_name = "sha512-ce",
.base.cra_priority = 200,
.base.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.base.cra_blocksize = SHA512_BLOCK_SIZE,
.base.cra_module = THIS_MODULE,
} };
static int __init sha512_ce_mod_init(void)
{
return crypto_register_shashes(algs, ARRAY_SIZE(algs));
}
static void __exit sha512_ce_mod_fini(void)
{
crypto_unregister_shashes(algs, ARRAY_SIZE(algs));
}
module_cpu_feature_match(SHA512, sha512_ce_mod_init);
module_exit(sha512_ce_mod_fini);
|
