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
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Glue code for the SHA1 Secure Hash Algorithm assembler implementation using
* ARM NEON instructions.
*
* Copyright © 2014 Jussi Kivilinna <jussi.kivilinna@iki.fi>
*
* This file is based on sha1_generic.c and sha1_ssse3_glue.c:
* Copyright (c) Alan Smithee.
* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
* Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
* Copyright (c) Mathias Krause <minipli@googlemail.com>
* Copyright (c) Chandramouli Narayanan <mouli@linux.intel.com>
*/
#include <crypto/internal/hash.h>
#include <crypto/internal/simd.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/types.h>
#include <crypto/sha1.h>
#include <crypto/sha1_base.h>
#include <asm/neon.h>
#include <asm/simd.h>
#include "sha1.h"
asmlinkage void sha1_transform_neon(struct sha1_state *state_h,
const u8 *data, int rounds);
static int sha1_neon_update(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
struct sha1_state *sctx = shash_desc_ctx(desc);
if (!crypto_simd_usable() ||
(sctx->count % SHA1_BLOCK_SIZE) + len < SHA1_BLOCK_SIZE)
return sha1_update_arm(desc, data, len);
kernel_neon_begin();
sha1_base_do_update(desc, data, len, sha1_transform_neon);
kernel_neon_end();
return 0;
}
static int sha1_neon_finup(struct shash_desc *desc, const u8 *data,
unsigned int len, u8 *out)
{
if (!crypto_simd_usable())
return sha1_finup_arm(desc, data, len, out);
kernel_neon_begin();
if (len)
sha1_base_do_update(desc, data, len, sha1_transform_neon);
sha1_base_do_finalize(desc, sha1_transform_neon);
kernel_neon_end();
return sha1_base_finish(desc, out);
}
static int sha1_neon_final(struct shash_desc *desc, u8 *out)
{
return sha1_neon_finup(desc, NULL, 0, out);
}
static struct shash_alg alg = {
.digestsize = SHA1_DIGEST_SIZE,
.init = sha1_base_init,
.update = sha1_neon_update,
.final = sha1_neon_final,
.finup = sha1_neon_finup,
.descsize = sizeof(struct sha1_state),
.base = {
.cra_name = "sha1",
.cra_driver_name = "sha1-neon",
.cra_priority = 250,
.cra_blocksize = SHA1_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
};
static int __init sha1_neon_mod_init(void)
{
if (!cpu_has_neon())
return -ENODEV;
return crypto_register_shash(&alg);
}
static void __exit sha1_neon_mod_fini(void)
{
crypto_unregister_shash(&alg);
}
module_init(sha1_neon_mod_init);
module_exit(sha1_neon_mod_fini);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm, NEON accelerated");
MODULE_ALIAS_CRYPTO("sha1");
|
