1 // SPDX-License-Identifier: GPL-2.0-only 1
2 /*
3 * sha2-ce-glue.c - SHA-224/SHA-256 using ARMv
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/sha2.h>
14 #include <crypto/sha256_base.h>
15 #include <linux/cpufeature.h>
16 #include <linux/crypto.h>
17 #include <linux/module.h>
18
19 MODULE_DESCRIPTION("SHA-224/SHA-256 secure has
20 MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@
21 MODULE_LICENSE("GPL v2");
22 MODULE_ALIAS_CRYPTO("sha224");
23 MODULE_ALIAS_CRYPTO("sha256");
24
25 struct sha256_ce_state {
26 struct sha256_state sst;
27 u32 finalize;
28 };
29
30 extern const u32 sha256_ce_offsetof_count;
31 extern const u32 sha256_ce_offsetof_finalize;
32
33 asmlinkage int __sha256_ce_transform(struct sh
34 int block
35
36 static void sha256_ce_transform(struct sha256_
37 int blocks)
38 {
39 while (blocks) {
40 int rem;
41
42 kernel_neon_begin();
43 rem = __sha256_ce_transform(co
44
45
46 kernel_neon_end();
47 src += (blocks - rem) * SHA256
48 blocks = rem;
49 }
50 }
51
52 const u32 sha256_ce_offsetof_count = offsetof(
53
54 const u32 sha256_ce_offsetof_finalize = offset
55
56
57 asmlinkage void sha256_block_data_order(u32 *d
58
59 static void sha256_arm64_transform(struct sha2
60 int blocks)
61 {
62 sha256_block_data_order(sst->state, sr
63 }
64
65 static int sha256_ce_update(struct shash_desc
66 unsigned int len)
67 {
68 struct sha256_ce_state *sctx = shash_d
69
70 if (!crypto_simd_usable())
71 return sha256_base_do_update(d
72 s
73
74 sctx->finalize = 0;
75 sha256_base_do_update(desc, data, len,
76
77 return 0;
78 }
79
80 static int sha256_ce_finup(struct shash_desc *
81 unsigned int len, u
82 {
83 struct sha256_ce_state *sctx = shash_d
84 bool finalize = !sctx->sst.count && !(
85
86 if (!crypto_simd_usable()) {
87 if (len)
88 sha256_base_do_update(
89
90 sha256_base_do_finalize(desc,
91 return sha256_base_finish(desc
92 }
93
94 /*
95 * Allow the asm code to perform the f
96 * partial data and the input is a rou
97 */
98 sctx->finalize = finalize;
99
100 sha256_base_do_update(desc, data, len,
101 if (!finalize)
102 sha256_base_do_finalize(desc,
103 return sha256_base_finish(desc, out);
104 }
105
106 static int sha256_ce_final(struct shash_desc *
107 {
108 struct sha256_ce_state *sctx = shash_d
109
110 if (!crypto_simd_usable()) {
111 sha256_base_do_finalize(desc,
112 return sha256_base_finish(desc
113 }
114
115 sctx->finalize = 0;
116 sha256_base_do_finalize(desc, sha256_c
117 return sha256_base_finish(desc, out);
118 }
119
120 static int sha256_ce_digest(struct shash_desc
121 unsigned int len,
122 {
123 sha256_base_init(desc);
124 return sha256_ce_finup(desc, data, len
125 }
126
127 static int sha256_ce_export(struct shash_desc
128 {
129 struct sha256_ce_state *sctx = shash_d
130
131 memcpy(out, &sctx->sst, sizeof(struct
132 return 0;
133 }
134
135 static int sha256_ce_import(struct shash_desc
136 {
137 struct sha256_ce_state *sctx = shash_d
138
139 memcpy(&sctx->sst, in, sizeof(struct s
140 sctx->finalize = 0;
141 return 0;
142 }
143
144 static struct shash_alg algs[] = { {
145 .init = sha224_base_
146 .update = sha256_ce_up
147 .final = sha256_ce_fi
148 .finup = sha256_ce_fi
149 .export = sha256_ce_ex
150 .import = sha256_ce_im
151 .descsize = sizeof(struc
152 .statesize = sizeof(struc
153 .digestsize = SHA224_DIGES
154 .base = {
155 .cra_name = "sha
156 .cra_driver_name = "sha
157 .cra_priority = 200,
158 .cra_blocksize = SHA2
159 .cra_module = THIS
160 }
161 }, {
162 .init = sha256_base_
163 .update = sha256_ce_up
164 .final = sha256_ce_fi
165 .finup = sha256_ce_fi
166 .digest = sha256_ce_di
167 .export = sha256_ce_ex
168 .import = sha256_ce_im
169 .descsize = sizeof(struc
170 .statesize = sizeof(struc
171 .digestsize = SHA256_DIGES
172 .base = {
173 .cra_name = "sha
174 .cra_driver_name = "sha
175 .cra_priority = 200,
176 .cra_blocksize = SHA2
177 .cra_module = THIS
178 }
179 } };
180
181 static int __init sha2_ce_mod_init(void)
182 {
183 return crypto_register_shashes(algs, A
184 }
185
186 static void __exit sha2_ce_mod_fini(void)
187 {
188 crypto_unregister_shashes(algs, ARRAY_
189 }
190
191 module_cpu_feature_match(SHA2, sha2_ce_mod_ini
192 module_exit(sha2_ce_mod_fini);
193
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