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192.168.1.100 / T800 / e267bb2ed708b33e68bfab4cde1502faab3adacb / . / src / kernel / linux / v4.19 / arch / arm64 / crypto / sha1-ce-glue.c
blob: c320030cc91454ab5eb551f35eec604fb69290f2 [file] [log] [blame]
xjb04a4022021-11-25 15:01:52 +0800[diff] [blame]1/*
2 * sha1-ce-glue.c - SHA-1 secure hash using ARMv8 Crypto Extensions
3 *
4 * Copyright (C) 2014 - 2017 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 <asm/neon.h>
12#include <asm/simd.h>
13#include <asm/unaligned.h>
14#include <crypto/internal/hash.h>
15#include <crypto/sha.h>
16#include <crypto/sha1_base.h>
17#include <linux/cpufeature.h>
18#include <linux/crypto.h>
19#include <linux/module.h>
20
21MODULE_DESCRIPTION("SHA1 secure hash using ARMv8 Crypto Extensions");
22MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
23MODULE_LICENSE("GPL v2");
24
25struct sha1_ce_state {
26 struct sha1_state sst;
27 u32 finalize;
28};
29
30asmlinkage void sha1_ce_transform(struct sha1_ce_state *sst, u8 const *src,
31 int blocks);
32#ifdef CONFIG_CFI_CLANG
33static inline void __cfi_sha1_ce_transform(struct sha1_state *sst,
34 u8 const *src, int blocks)
35{
36 sha1_ce_transform((struct sha1_ce_state *)sst, src, blocks);
37}
38#define sha1_ce_transform __cfi_sha1_ce_transform
39#endif
40
41const u32 sha1_ce_offsetof_count = offsetof(struct sha1_ce_state, sst.count);
42const u32 sha1_ce_offsetof_finalize = offsetof(struct sha1_ce_state, finalize);
43
44static int sha1_ce_update(struct shash_desc *desc, const u8 *data,
45 unsigned int len)
46{
47 struct sha1_ce_state *sctx = shash_desc_ctx(desc);
48
49 if (!may_use_simd())
50 return crypto_sha1_update(desc, data, len);
51
52 sctx->finalize = 0;
53 kernel_neon_begin();
54 sha1_base_do_update(desc, data, len,
55 (sha1_block_fn *)sha1_ce_transform);
56 kernel_neon_end();
57
58 return 0;
59}
60
61static int sha1_ce_finup(struct shash_desc *desc, const u8 *data,
62 unsigned int len, u8 *out)
63{
64 struct sha1_ce_state *sctx = shash_desc_ctx(desc);
65 bool finalize = !sctx->sst.count && !(len % SHA1_BLOCK_SIZE) && len;
66
67 if (!may_use_simd())
68 return crypto_sha1_finup(desc, data, len, out);
69
70 /*
71 * Allow the asm code to perform the finalization if there is no
72 * partial data and the input is a round multiple of the block size.
73 */
74 sctx->finalize = finalize;
75
76 kernel_neon_begin();
77 sha1_base_do_update(desc, data, len,
78 (sha1_block_fn *)sha1_ce_transform);
79 if (!finalize)
80 sha1_base_do_finalize(desc, (sha1_block_fn *)sha1_ce_transform);
81 kernel_neon_end();
82 return sha1_base_finish(desc, out);
83}
84
85static int sha1_ce_final(struct shash_desc *desc, u8 *out)
86{
87 struct sha1_ce_state *sctx = shash_desc_ctx(desc);
88
89 if (!may_use_simd())
90 return crypto_sha1_finup(desc, NULL, 0, out);
91
92 sctx->finalize = 0;
93 kernel_neon_begin();
94 sha1_base_do_finalize(desc, (sha1_block_fn *)sha1_ce_transform);
95 kernel_neon_end();
96 return sha1_base_finish(desc, out);
97}
98
99static struct shash_alg alg = {
100 .init = sha1_base_init,
101 .update = sha1_ce_update,
102 .final = sha1_ce_final,
103 .finup = sha1_ce_finup,
104 .descsize = sizeof(struct sha1_ce_state),
105 .digestsize = SHA1_DIGEST_SIZE,
106 .base = {
107 .cra_name = "sha1",
108 .cra_driver_name = "sha1-ce",
109 .cra_priority = 200,
110 .cra_blocksize = SHA1_BLOCK_SIZE,
111 .cra_module = THIS_MODULE,
112 }
113};
114
115static int __init sha1_ce_mod_init(void)
116{
117 return crypto_register_shash(&alg);
118}
119
120static void __exit sha1_ce_mod_fini(void)
121{
122 crypto_unregister_shash(&alg);
123}
124
125module_cpu_feature_match(SHA1, sha1_ce_mod_init);
126module_exit(sha1_ce_mod_fini);