1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Glue code for the SHA1 Secure Hash Algorithm assembler implementation using
4*4882a593Smuzhiyun * ARM NEON instructions.
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * Copyright © 2014 Jussi Kivilinna <jussi.kivilinna@iki.fi>
7*4882a593Smuzhiyun *
8*4882a593Smuzhiyun * This file is based on sha1_generic.c and sha1_ssse3_glue.c:
9*4882a593Smuzhiyun * Copyright (c) Alan Smithee.
10*4882a593Smuzhiyun * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
11*4882a593Smuzhiyun * Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
12*4882a593Smuzhiyun * Copyright (c) Mathias Krause <minipli@googlemail.com>
13*4882a593Smuzhiyun * Copyright (c) Chandramouli Narayanan <mouli@linux.intel.com>
14*4882a593Smuzhiyun */
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #include <crypto/internal/hash.h>
17*4882a593Smuzhiyun #include <crypto/internal/simd.h>
18*4882a593Smuzhiyun #include <linux/init.h>
19*4882a593Smuzhiyun #include <linux/module.h>
20*4882a593Smuzhiyun #include <linux/mm.h>
21*4882a593Smuzhiyun #include <linux/types.h>
22*4882a593Smuzhiyun #include <crypto/sha.h>
23*4882a593Smuzhiyun #include <crypto/sha1_base.h>
24*4882a593Smuzhiyun #include <asm/neon.h>
25*4882a593Smuzhiyun #include <asm/simd.h>
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun #include "sha1.h"
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun asmlinkage void sha1_transform_neon(void *state_h, const char *data,
30*4882a593Smuzhiyun unsigned int rounds);
31*4882a593Smuzhiyun
sha1_neon_update(struct shash_desc * desc,const u8 * data,unsigned int len)32*4882a593Smuzhiyun static int sha1_neon_update(struct shash_desc *desc, const u8 *data,
33*4882a593Smuzhiyun unsigned int len)
34*4882a593Smuzhiyun {
35*4882a593Smuzhiyun struct sha1_state *sctx = shash_desc_ctx(desc);
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun if (!crypto_simd_usable() ||
38*4882a593Smuzhiyun (sctx->count % SHA1_BLOCK_SIZE) + len < SHA1_BLOCK_SIZE)
39*4882a593Smuzhiyun return sha1_update_arm(desc, data, len);
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun kernel_neon_begin();
42*4882a593Smuzhiyun sha1_base_do_update(desc, data, len,
43*4882a593Smuzhiyun (sha1_block_fn *)sha1_transform_neon);
44*4882a593Smuzhiyun kernel_neon_end();
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun return 0;
47*4882a593Smuzhiyun }
48*4882a593Smuzhiyun
sha1_neon_finup(struct shash_desc * desc,const u8 * data,unsigned int len,u8 * out)49*4882a593Smuzhiyun static int sha1_neon_finup(struct shash_desc *desc, const u8 *data,
50*4882a593Smuzhiyun unsigned int len, u8 *out)
51*4882a593Smuzhiyun {
52*4882a593Smuzhiyun if (!crypto_simd_usable())
53*4882a593Smuzhiyun return sha1_finup_arm(desc, data, len, out);
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun kernel_neon_begin();
56*4882a593Smuzhiyun if (len)
57*4882a593Smuzhiyun sha1_base_do_update(desc, data, len,
58*4882a593Smuzhiyun (sha1_block_fn *)sha1_transform_neon);
59*4882a593Smuzhiyun sha1_base_do_finalize(desc, (sha1_block_fn *)sha1_transform_neon);
60*4882a593Smuzhiyun kernel_neon_end();
61*4882a593Smuzhiyun
62*4882a593Smuzhiyun return sha1_base_finish(desc, out);
63*4882a593Smuzhiyun }
64*4882a593Smuzhiyun
sha1_neon_final(struct shash_desc * desc,u8 * out)65*4882a593Smuzhiyun static int sha1_neon_final(struct shash_desc *desc, u8 *out)
66*4882a593Smuzhiyun {
67*4882a593Smuzhiyun return sha1_neon_finup(desc, NULL, 0, out);
68*4882a593Smuzhiyun }
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun static struct shash_alg alg = {
71*4882a593Smuzhiyun .digestsize = SHA1_DIGEST_SIZE,
72*4882a593Smuzhiyun .init = sha1_base_init,
73*4882a593Smuzhiyun .update = sha1_neon_update,
74*4882a593Smuzhiyun .final = sha1_neon_final,
75*4882a593Smuzhiyun .finup = sha1_neon_finup,
76*4882a593Smuzhiyun .descsize = sizeof(struct sha1_state),
77*4882a593Smuzhiyun .base = {
78*4882a593Smuzhiyun .cra_name = "sha1",
79*4882a593Smuzhiyun .cra_driver_name = "sha1-neon",
80*4882a593Smuzhiyun .cra_priority = 250,
81*4882a593Smuzhiyun .cra_blocksize = SHA1_BLOCK_SIZE,
82*4882a593Smuzhiyun .cra_module = THIS_MODULE,
83*4882a593Smuzhiyun }
84*4882a593Smuzhiyun };
85*4882a593Smuzhiyun
sha1_neon_mod_init(void)86*4882a593Smuzhiyun static int __init sha1_neon_mod_init(void)
87*4882a593Smuzhiyun {
88*4882a593Smuzhiyun if (!cpu_has_neon())
89*4882a593Smuzhiyun return -ENODEV;
90*4882a593Smuzhiyun
91*4882a593Smuzhiyun return crypto_register_shash(&alg);
92*4882a593Smuzhiyun }
93*4882a593Smuzhiyun
sha1_neon_mod_fini(void)94*4882a593Smuzhiyun static void __exit sha1_neon_mod_fini(void)
95*4882a593Smuzhiyun {
96*4882a593Smuzhiyun crypto_unregister_shash(&alg);
97*4882a593Smuzhiyun }
98*4882a593Smuzhiyun
99*4882a593Smuzhiyun module_init(sha1_neon_mod_init);
100*4882a593Smuzhiyun module_exit(sha1_neon_mod_fini);
101*4882a593Smuzhiyun
102*4882a593Smuzhiyun MODULE_LICENSE("GPL");
103*4882a593Smuzhiyun MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm, NEON accelerated");
104*4882a593Smuzhiyun MODULE_ALIAS_CRYPTO("sha1");
105