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60468255 JK |
1 | /* |
2 | * Glue code for the SHA1 Secure Hash Algorithm assembler implementation using | |
3 | * ARM NEON instructions. | |
4 | * | |
5 | * Copyright © 2014 Jussi Kivilinna <jussi.kivilinna@iki.fi> | |
6 | * | |
7 | * This file is based on sha1_generic.c and sha1_ssse3_glue.c: | |
8 | * Copyright (c) Alan Smithee. | |
9 | * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> | |
10 | * Copyright (c) Jean-Francois Dive <jef@linuxbe.org> | |
11 | * Copyright (c) Mathias Krause <minipli@googlemail.com> | |
12 | * Copyright (c) Chandramouli Narayanan <mouli@linux.intel.com> | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or modify it | |
15 | * under the terms of the GNU General Public License as published by the Free | |
16 | * Software Foundation; either version 2 of the License, or (at your option) | |
17 | * any later version. | |
18 | * | |
19 | */ | |
20 | ||
21 | #include <crypto/internal/hash.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/mm.h> | |
25 | #include <linux/cryptohash.h> | |
26 | #include <linux/types.h> | |
27 | #include <crypto/sha.h> | |
51e515fa | 28 | #include <crypto/sha1_base.h> |
60468255 JK |
29 | #include <asm/neon.h> |
30 | #include <asm/simd.h> | |
60468255 | 31 | |
90451d6b | 32 | #include "sha1.h" |
60468255 JK |
33 | |
34 | asmlinkage void sha1_transform_neon(void *state_h, const char *data, | |
35 | unsigned int rounds); | |
36 | ||
60468255 | 37 | static int sha1_neon_update(struct shash_desc *desc, const u8 *data, |
51e515fa | 38 | unsigned int len) |
60468255 JK |
39 | { |
40 | struct sha1_state *sctx = shash_desc_ctx(desc); | |
60468255 | 41 | |
51e515fa AB |
42 | if (!may_use_simd() || |
43 | (sctx->count % SHA1_BLOCK_SIZE) + len < SHA1_BLOCK_SIZE) | |
44 | return sha1_update_arm(desc, data, len); | |
60468255 | 45 | |
51e515fa AB |
46 | kernel_neon_begin(); |
47 | sha1_base_do_update(desc, data, len, | |
48 | (sha1_block_fn *)sha1_transform_neon); | |
49 | kernel_neon_end(); | |
60468255 JK |
50 | |
51 | return 0; | |
52 | } | |
53 | ||
51e515fa AB |
54 | static int sha1_neon_finup(struct shash_desc *desc, const u8 *data, |
55 | unsigned int len, u8 *out) | |
60468255 | 56 | { |
51e515fa AB |
57 | if (!may_use_simd()) |
58 | return sha1_finup_arm(desc, data, len, out); | |
60468255 | 59 | |
51e515fa AB |
60 | kernel_neon_begin(); |
61 | if (len) | |
62 | sha1_base_do_update(desc, data, len, | |
63 | (sha1_block_fn *)sha1_transform_neon); | |
64 | sha1_base_do_finalize(desc, (sha1_block_fn *)sha1_transform_neon); | |
65 | kernel_neon_end(); | |
60468255 | 66 | |
51e515fa | 67 | return sha1_base_finish(desc, out); |
60468255 JK |
68 | } |
69 | ||
51e515fa | 70 | static int sha1_neon_final(struct shash_desc *desc, u8 *out) |
60468255 | 71 | { |
51e515fa | 72 | return sha1_neon_finup(desc, NULL, 0, out); |
60468255 JK |
73 | } |
74 | ||
75 | static struct shash_alg alg = { | |
76 | .digestsize = SHA1_DIGEST_SIZE, | |
51e515fa | 77 | .init = sha1_base_init, |
60468255 JK |
78 | .update = sha1_neon_update, |
79 | .final = sha1_neon_final, | |
51e515fa | 80 | .finup = sha1_neon_finup, |
60468255 | 81 | .descsize = sizeof(struct sha1_state), |
60468255 JK |
82 | .base = { |
83 | .cra_name = "sha1", | |
84 | .cra_driver_name = "sha1-neon", | |
85 | .cra_priority = 250, | |
86 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, | |
87 | .cra_blocksize = SHA1_BLOCK_SIZE, | |
88 | .cra_module = THIS_MODULE, | |
89 | } | |
90 | }; | |
91 | ||
92 | static int __init sha1_neon_mod_init(void) | |
93 | { | |
94 | if (!cpu_has_neon()) | |
95 | return -ENODEV; | |
96 | ||
97 | return crypto_register_shash(&alg); | |
98 | } | |
99 | ||
100 | static void __exit sha1_neon_mod_fini(void) | |
101 | { | |
102 | crypto_unregister_shash(&alg); | |
103 | } | |
104 | ||
105 | module_init(sha1_neon_mod_init); | |
106 | module_exit(sha1_neon_mod_fini); | |
107 | ||
108 | MODULE_LICENSE("GPL"); | |
109 | MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm, NEON accelerated"); | |
5d26a105 | 110 | MODULE_ALIAS_CRYPTO("sha1"); |