1 // SPDX-License-Identifier: GPL-2.0-only 1
2 /*
3 * sha1-ce-glue.c - SHA-1 secure hash using AR
4 *
5 * Copyright (C) 2014 - 2017 Linaro Ltd <ard.b
6 */
7
8 #include <asm/neon.h>
9 #include <asm/simd.h>
10 #include <linux/unaligned.h>
11 #include <crypto/internal/hash.h>
12 #include <crypto/internal/simd.h>
13 #include <crypto/sha1.h>
14 #include <crypto/sha1_base.h>
15 #include <linux/cpufeature.h>
16 #include <linux/crypto.h>
17 #include <linux/module.h>
18
19 MODULE_DESCRIPTION("SHA1 secure hash using ARM
20 MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@
21 MODULE_LICENSE("GPL v2");
22 MODULE_ALIAS_CRYPTO("sha1");
23
24 struct sha1_ce_state {
25 struct sha1_state sst;
26 u32 finalize;
27 };
28
29 extern const u32 sha1_ce_offsetof_count;
30 extern const u32 sha1_ce_offsetof_finalize;
31
32 asmlinkage int __sha1_ce_transform(struct sha1
33 int blocks)
34
35 static void sha1_ce_transform(struct sha1_stat
36 int blocks)
37 {
38 while (blocks) {
39 int rem;
40
41 kernel_neon_begin();
42 rem = __sha1_ce_transform(cont
43
44
45 kernel_neon_end();
46 src += (blocks - rem) * SHA1_B
47 blocks = rem;
48 }
49 }
50
51 const u32 sha1_ce_offsetof_count = offsetof(st
52 const u32 sha1_ce_offsetof_finalize = offsetof
53
54 static int sha1_ce_update(struct shash_desc *d
55 unsigned int len)
56 {
57 struct sha1_ce_state *sctx = shash_des
58
59 if (!crypto_simd_usable())
60 return crypto_sha1_update(desc
61
62 sctx->finalize = 0;
63 sha1_base_do_update(desc, data, len, s
64
65 return 0;
66 }
67
68 static int sha1_ce_finup(struct shash_desc *de
69 unsigned int len, u8
70 {
71 struct sha1_ce_state *sctx = shash_des
72 bool finalize = !sctx->sst.count && !(
73
74 if (!crypto_simd_usable())
75 return crypto_sha1_finup(desc,
76
77 /*
78 * Allow the asm code to perform the f
79 * partial data and the input is a rou
80 */
81 sctx->finalize = finalize;
82
83 sha1_base_do_update(desc, data, len, s
84 if (!finalize)
85 sha1_base_do_finalize(desc, sh
86 return sha1_base_finish(desc, out);
87 }
88
89 static int sha1_ce_final(struct shash_desc *de
90 {
91 struct sha1_ce_state *sctx = shash_des
92
93 if (!crypto_simd_usable())
94 return crypto_sha1_finup(desc,
95
96 sctx->finalize = 0;
97 sha1_base_do_finalize(desc, sha1_ce_tr
98 return sha1_base_finish(desc, out);
99 }
100
101 static int sha1_ce_export(struct shash_desc *d
102 {
103 struct sha1_ce_state *sctx = shash_des
104
105 memcpy(out, &sctx->sst, sizeof(struct
106 return 0;
107 }
108
109 static int sha1_ce_import(struct shash_desc *d
110 {
111 struct sha1_ce_state *sctx = shash_des
112
113 memcpy(&sctx->sst, in, sizeof(struct s
114 sctx->finalize = 0;
115 return 0;
116 }
117
118 static struct shash_alg alg = {
119 .init = sha1_base_in
120 .update = sha1_ce_upda
121 .final = sha1_ce_fina
122 .finup = sha1_ce_finu
123 .import = sha1_ce_impo
124 .export = sha1_ce_expo
125 .descsize = sizeof(struc
126 .statesize = sizeof(struc
127 .digestsize = SHA1_DIGEST_
128 .base = {
129 .cra_name = "sha
130 .cra_driver_name = "sha
131 .cra_priority = 200,
132 .cra_blocksize = SHA1
133 .cra_module = THIS
134 }
135 };
136
137 static int __init sha1_ce_mod_init(void)
138 {
139 return crypto_register_shash(&alg);
140 }
141
142 static void __exit sha1_ce_mod_fini(void)
143 {
144 crypto_unregister_shash(&alg);
145 }
146
147 module_cpu_feature_match(SHA1, sha1_ce_mod_ini
148 module_exit(sha1_ce_mod_fini);
149
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