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c80ae7ca AB |
1 | /* |
2 | * sha512-neon-glue.c - accelerated SHA-384/512 for ARM NEON | |
3 | * | |
4 | * Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
11 | #include <crypto/internal/hash.h> | |
12 | #include <crypto/sha.h> | |
13 | #include <crypto/sha512_base.h> | |
14 | #include <linux/crypto.h> | |
15 | #include <linux/module.h> | |
16 | ||
17 | #include <asm/simd.h> | |
18 | #include <asm/neon.h> | |
19 | ||
20 | #include "sha512.h" | |
21 | ||
22 | MODULE_ALIAS_CRYPTO("sha384-neon"); | |
23 | MODULE_ALIAS_CRYPTO("sha512-neon"); | |
24 | ||
25 | asmlinkage void sha512_block_data_order_neon(u64 *state, u8 const *src, | |
26 | int blocks); | |
27 | ||
28 | static int sha512_neon_update(struct shash_desc *desc, const u8 *data, | |
29 | unsigned int len) | |
30 | { | |
31 | struct sha512_state *sctx = shash_desc_ctx(desc); | |
32 | ||
33 | if (!may_use_simd() || | |
34 | (sctx->count[0] % SHA512_BLOCK_SIZE) + len < SHA512_BLOCK_SIZE) | |
35 | return sha512_arm_update(desc, data, len); | |
36 | ||
37 | kernel_neon_begin(); | |
38 | sha512_base_do_update(desc, data, len, | |
39 | (sha512_block_fn *)sha512_block_data_order_neon); | |
40 | kernel_neon_end(); | |
41 | ||
42 | return 0; | |
43 | } | |
44 | ||
45 | static int sha512_neon_finup(struct shash_desc *desc, const u8 *data, | |
46 | unsigned int len, u8 *out) | |
47 | { | |
48 | if (!may_use_simd()) | |
49 | return sha512_arm_finup(desc, data, len, out); | |
50 | ||
51 | kernel_neon_begin(); | |
52 | if (len) | |
53 | sha512_base_do_update(desc, data, len, | |
54 | (sha512_block_fn *)sha512_block_data_order_neon); | |
55 | sha512_base_do_finalize(desc, | |
56 | (sha512_block_fn *)sha512_block_data_order_neon); | |
57 | kernel_neon_end(); | |
58 | ||
59 | return sha512_base_finish(desc, out); | |
60 | } | |
61 | ||
62 | static int sha512_neon_final(struct shash_desc *desc, u8 *out) | |
63 | { | |
64 | return sha512_neon_finup(desc, NULL, 0, out); | |
65 | } | |
66 | ||
67 | struct shash_alg sha512_neon_algs[] = { { | |
68 | .init = sha384_base_init, | |
69 | .update = sha512_neon_update, | |
70 | .final = sha512_neon_final, | |
71 | .finup = sha512_neon_finup, | |
72 | .descsize = sizeof(struct sha512_state), | |
73 | .digestsize = SHA384_DIGEST_SIZE, | |
74 | .base = { | |
75 | .cra_name = "sha384", | |
76 | .cra_driver_name = "sha384-neon", | |
77 | .cra_priority = 300, | |
78 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, | |
79 | .cra_blocksize = SHA384_BLOCK_SIZE, | |
80 | .cra_module = THIS_MODULE, | |
81 | ||
82 | } | |
83 | }, { | |
84 | .init = sha512_base_init, | |
85 | .update = sha512_neon_update, | |
86 | .final = sha512_neon_final, | |
87 | .finup = sha512_neon_finup, | |
88 | .descsize = sizeof(struct sha512_state), | |
89 | .digestsize = SHA512_DIGEST_SIZE, | |
90 | .base = { | |
91 | .cra_name = "sha512", | |
92 | .cra_driver_name = "sha512-neon", | |
93 | .cra_priority = 300, | |
94 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, | |
95 | .cra_blocksize = SHA512_BLOCK_SIZE, | |
96 | .cra_module = THIS_MODULE, | |
97 | } | |
98 | } }; |