1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * sm3-ce-glue.c - SM3 secure hash using ARMv8.2 Crypto Extensions |
4 | * |
5 | * Copyright (C) 2018 Linaro Ltd <ard.biesheuvel@linaro.org> |
6 | */ |
7 | |
8 | #include <asm/neon.h> |
9 | #include <asm/simd.h> |
10 | #include <asm/unaligned.h> |
11 | #include <crypto/internal/hash.h> |
12 | #include <crypto/internal/simd.h> |
13 | #include <crypto/sm3.h> |
14 | #include <crypto/sm3_base.h> |
15 | #include <linux/cpufeature.h> |
16 | #include <linux/crypto.h> |
17 | #include <linux/module.h> |
18 | |
19 | MODULE_DESCRIPTION("SM3 secure hash using ARMv8 Crypto Extensions" ); |
20 | MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>" ); |
21 | MODULE_LICENSE("GPL v2" ); |
22 | |
23 | asmlinkage void sm3_ce_transform(struct sm3_state *sst, u8 const *src, |
24 | int blocks); |
25 | |
26 | static int sm3_ce_update(struct shash_desc *desc, const u8 *data, |
27 | unsigned int len) |
28 | { |
29 | if (!crypto_simd_usable()) { |
30 | sm3_update(sctx: shash_desc_ctx(desc), data, len); |
31 | return 0; |
32 | } |
33 | |
34 | kernel_neon_begin(); |
35 | sm3_base_do_update(desc, data, len, block_fn: sm3_ce_transform); |
36 | kernel_neon_end(); |
37 | |
38 | return 0; |
39 | } |
40 | |
41 | static int sm3_ce_final(struct shash_desc *desc, u8 *out) |
42 | { |
43 | if (!crypto_simd_usable()) { |
44 | sm3_final(sctx: shash_desc_ctx(desc), out); |
45 | return 0; |
46 | } |
47 | |
48 | kernel_neon_begin(); |
49 | sm3_base_do_finalize(desc, block_fn: sm3_ce_transform); |
50 | kernel_neon_end(); |
51 | |
52 | return sm3_base_finish(desc, out); |
53 | } |
54 | |
55 | static int sm3_ce_finup(struct shash_desc *desc, const u8 *data, |
56 | unsigned int len, u8 *out) |
57 | { |
58 | if (!crypto_simd_usable()) { |
59 | struct sm3_state *sctx = shash_desc_ctx(desc); |
60 | |
61 | if (len) |
62 | sm3_update(sctx, data, len); |
63 | sm3_final(sctx, out); |
64 | return 0; |
65 | } |
66 | |
67 | kernel_neon_begin(); |
68 | if (len) |
69 | sm3_base_do_update(desc, data, len, block_fn: sm3_ce_transform); |
70 | sm3_base_do_finalize(desc, block_fn: sm3_ce_transform); |
71 | kernel_neon_end(); |
72 | |
73 | return sm3_base_finish(desc, out); |
74 | } |
75 | |
76 | static struct shash_alg sm3_alg = { |
77 | .digestsize = SM3_DIGEST_SIZE, |
78 | .init = sm3_base_init, |
79 | .update = sm3_ce_update, |
80 | .final = sm3_ce_final, |
81 | .finup = sm3_ce_finup, |
82 | .descsize = sizeof(struct sm3_state), |
83 | .base.cra_name = "sm3" , |
84 | .base.cra_driver_name = "sm3-ce" , |
85 | .base.cra_blocksize = SM3_BLOCK_SIZE, |
86 | .base.cra_module = THIS_MODULE, |
87 | .base.cra_priority = 400, |
88 | }; |
89 | |
90 | static int __init sm3_ce_mod_init(void) |
91 | { |
92 | return crypto_register_shash(alg: &sm3_alg); |
93 | } |
94 | |
95 | static void __exit sm3_ce_mod_fini(void) |
96 | { |
97 | crypto_unregister_shash(alg: &sm3_alg); |
98 | } |
99 | |
100 | module_cpu_feature_match(SM3, sm3_ce_mod_init); |
101 | module_exit(sm3_ce_mod_fini); |
102 | |