1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * sha512-ce-glue.c - SHA-384/SHA-512 using ARMv8 Crypto Extensions |
4 | * |
5 | * Copyright (C) 2018 Linaro Ltd <ard.biesheuvel@linaro.org> |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify |
8 | * it under the terms of the GNU General Public License version 2 as |
9 | * published by the Free Software Foundation. |
10 | */ |
11 | |
12 | #include <asm/neon.h> |
13 | #include <crypto/internal/hash.h> |
14 | #include <crypto/sha2.h> |
15 | #include <crypto/sha512_base.h> |
16 | #include <linux/cpufeature.h> |
17 | #include <linux/kernel.h> |
18 | #include <linux/module.h> |
19 | |
20 | MODULE_DESCRIPTION("SHA-384/SHA-512 secure hash using ARMv8 Crypto Extensions" ); |
21 | MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>" ); |
22 | MODULE_LICENSE("GPL v2" ); |
23 | MODULE_ALIAS_CRYPTO("sha384" ); |
24 | MODULE_ALIAS_CRYPTO("sha512" ); |
25 | |
26 | asmlinkage int __sha512_ce_transform(struct sha512_state *sst, u8 const *src, |
27 | int blocks); |
28 | |
29 | static void sha512_ce_transform(struct sha512_state *sst, u8 const *src, |
30 | int blocks) |
31 | { |
32 | do { |
33 | int rem; |
34 | |
35 | kernel_neon_begin(); |
36 | rem = __sha512_ce_transform(sst, src, blocks); |
37 | kernel_neon_end(); |
38 | src += (blocks - rem) * SHA512_BLOCK_SIZE; |
39 | blocks = rem; |
40 | } while (blocks); |
41 | } |
42 | |
43 | static int sha512_ce_update(struct shash_desc *desc, const u8 *data, |
44 | unsigned int len) |
45 | { |
46 | return sha512_base_do_update_blocks(desc, data, len, |
47 | block_fn: sha512_ce_transform); |
48 | } |
49 | |
50 | static int sha512_ce_finup(struct shash_desc *desc, const u8 *data, |
51 | unsigned int len, u8 *out) |
52 | { |
53 | sha512_base_do_finup(desc, src: data, len, block_fn: sha512_ce_transform); |
54 | return sha512_base_finish(desc, out); |
55 | } |
56 | |
57 | static struct shash_alg algs[] = { { |
58 | .init = sha384_base_init, |
59 | .update = sha512_ce_update, |
60 | .finup = sha512_ce_finup, |
61 | .descsize = SHA512_STATE_SIZE, |
62 | .digestsize = SHA384_DIGEST_SIZE, |
63 | .base.cra_name = "sha384" , |
64 | .base.cra_driver_name = "sha384-ce" , |
65 | .base.cra_priority = 200, |
66 | .base.cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY | |
67 | CRYPTO_AHASH_ALG_FINUP_MAX, |
68 | .base.cra_blocksize = SHA512_BLOCK_SIZE, |
69 | .base.cra_module = THIS_MODULE, |
70 | }, { |
71 | .init = sha512_base_init, |
72 | .update = sha512_ce_update, |
73 | .finup = sha512_ce_finup, |
74 | .descsize = SHA512_STATE_SIZE, |
75 | .digestsize = SHA512_DIGEST_SIZE, |
76 | .base.cra_name = "sha512" , |
77 | .base.cra_driver_name = "sha512-ce" , |
78 | .base.cra_priority = 200, |
79 | .base.cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY | |
80 | CRYPTO_AHASH_ALG_FINUP_MAX, |
81 | .base.cra_blocksize = SHA512_BLOCK_SIZE, |
82 | .base.cra_module = THIS_MODULE, |
83 | } }; |
84 | |
85 | static int __init sha512_ce_mod_init(void) |
86 | { |
87 | return crypto_register_shashes(algs, ARRAY_SIZE(algs)); |
88 | } |
89 | |
90 | static void __exit sha512_ce_mod_fini(void) |
91 | { |
92 | crypto_unregister_shashes(algs, ARRAY_SIZE(algs)); |
93 | } |
94 | |
95 | module_cpu_feature_match(SHA512, sha512_ce_mod_init); |
96 | module_exit(sha512_ce_mod_fini); |
97 | |