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 <asm/simd.h> |
14 | #include <asm/unaligned.h> |
15 | #include <crypto/internal/hash.h> |
16 | #include <crypto/internal/simd.h> |
17 | #include <crypto/sha2.h> |
18 | #include <crypto/sha512_base.h> |
19 | #include <linux/cpufeature.h> |
20 | #include <linux/crypto.h> |
21 | #include <linux/module.h> |
22 | |
23 | MODULE_DESCRIPTION("SHA-384/SHA-512 secure hash using ARMv8 Crypto Extensions" ); |
24 | MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>" ); |
25 | MODULE_LICENSE("GPL v2" ); |
26 | MODULE_ALIAS_CRYPTO("sha384" ); |
27 | MODULE_ALIAS_CRYPTO("sha512" ); |
28 | |
29 | asmlinkage int __sha512_ce_transform(struct sha512_state *sst, u8 const *src, |
30 | int blocks); |
31 | |
32 | asmlinkage void sha512_block_data_order(u64 *digest, u8 const *src, int blocks); |
33 | |
34 | static void sha512_ce_transform(struct sha512_state *sst, u8 const *src, |
35 | int blocks) |
36 | { |
37 | while (blocks) { |
38 | int rem; |
39 | |
40 | kernel_neon_begin(); |
41 | rem = __sha512_ce_transform(sst, src, blocks); |
42 | kernel_neon_end(); |
43 | src += (blocks - rem) * SHA512_BLOCK_SIZE; |
44 | blocks = rem; |
45 | } |
46 | } |
47 | |
48 | static void sha512_arm64_transform(struct sha512_state *sst, u8 const *src, |
49 | int blocks) |
50 | { |
51 | sha512_block_data_order(digest: sst->state, src, blocks); |
52 | } |
53 | |
54 | static int sha512_ce_update(struct shash_desc *desc, const u8 *data, |
55 | unsigned int len) |
56 | { |
57 | sha512_block_fn *fn = crypto_simd_usable() ? sha512_ce_transform |
58 | : sha512_arm64_transform; |
59 | |
60 | sha512_base_do_update(desc, data, len, block_fn: fn); |
61 | return 0; |
62 | } |
63 | |
64 | static int sha512_ce_finup(struct shash_desc *desc, const u8 *data, |
65 | unsigned int len, u8 *out) |
66 | { |
67 | sha512_block_fn *fn = crypto_simd_usable() ? sha512_ce_transform |
68 | : sha512_arm64_transform; |
69 | |
70 | sha512_base_do_update(desc, data, len, block_fn: fn); |
71 | sha512_base_do_finalize(desc, block_fn: fn); |
72 | return sha512_base_finish(desc, out); |
73 | } |
74 | |
75 | static int sha512_ce_final(struct shash_desc *desc, u8 *out) |
76 | { |
77 | sha512_block_fn *fn = crypto_simd_usable() ? sha512_ce_transform |
78 | : sha512_arm64_transform; |
79 | |
80 | sha512_base_do_finalize(desc, block_fn: fn); |
81 | return sha512_base_finish(desc, out); |
82 | } |
83 | |
84 | static struct shash_alg algs[] = { { |
85 | .init = sha384_base_init, |
86 | .update = sha512_ce_update, |
87 | .final = sha512_ce_final, |
88 | .finup = sha512_ce_finup, |
89 | .descsize = sizeof(struct sha512_state), |
90 | .digestsize = SHA384_DIGEST_SIZE, |
91 | .base.cra_name = "sha384" , |
92 | .base.cra_driver_name = "sha384-ce" , |
93 | .base.cra_priority = 200, |
94 | .base.cra_blocksize = SHA512_BLOCK_SIZE, |
95 | .base.cra_module = THIS_MODULE, |
96 | }, { |
97 | .init = sha512_base_init, |
98 | .update = sha512_ce_update, |
99 | .final = sha512_ce_final, |
100 | .finup = sha512_ce_finup, |
101 | .descsize = sizeof(struct sha512_state), |
102 | .digestsize = SHA512_DIGEST_SIZE, |
103 | .base.cra_name = "sha512" , |
104 | .base.cra_driver_name = "sha512-ce" , |
105 | .base.cra_priority = 200, |
106 | .base.cra_blocksize = SHA512_BLOCK_SIZE, |
107 | .base.cra_module = THIS_MODULE, |
108 | } }; |
109 | |
110 | static int __init sha512_ce_mod_init(void) |
111 | { |
112 | return crypto_register_shashes(algs, ARRAY_SIZE(algs)); |
113 | } |
114 | |
115 | static void __exit sha512_ce_mod_fini(void) |
116 | { |
117 | crypto_unregister_shashes(algs, ARRAY_SIZE(algs)); |
118 | } |
119 | |
120 | module_cpu_feature_match(SHA512, sha512_ce_mod_init); |
121 | module_exit(sha512_ce_mod_fini); |
122 | |