This source file includes following definitions.
- sha256_ce_update
- sha256_ce_finup
- sha256_ce_final
- sha2_ce_mod_init
- sha2_ce_mod_fini
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8 #include <asm/neon.h>
9 #include <asm/simd.h>
10 #include <asm/unaligned.h>
11 #include <crypto/internal/hash.h>
12 #include <crypto/internal/simd.h>
13 #include <crypto/sha.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 hash using ARMv8 Crypto Extensions");
20 MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
21 MODULE_LICENSE("GPL v2");
22
23 struct sha256_ce_state {
24 struct sha256_state sst;
25 u32 finalize;
26 };
27
28 asmlinkage void sha2_ce_transform(struct sha256_ce_state *sst, u8 const *src,
29 int blocks);
30
31 const u32 sha256_ce_offsetof_count = offsetof(struct sha256_ce_state,
32 sst.count);
33 const u32 sha256_ce_offsetof_finalize = offsetof(struct sha256_ce_state,
34 finalize);
35
36 asmlinkage void sha256_block_data_order(u32 *digest, u8 const *src, int blocks);
37
38 static int sha256_ce_update(struct shash_desc *desc, const u8 *data,
39 unsigned int len)
40 {
41 struct sha256_ce_state *sctx = shash_desc_ctx(desc);
42
43 if (!crypto_simd_usable())
44 return sha256_base_do_update(desc, data, len,
45 (sha256_block_fn *)sha256_block_data_order);
46
47 sctx->finalize = 0;
48 kernel_neon_begin();
49 sha256_base_do_update(desc, data, len,
50 (sha256_block_fn *)sha2_ce_transform);
51 kernel_neon_end();
52
53 return 0;
54 }
55
56 static int sha256_ce_finup(struct shash_desc *desc, const u8 *data,
57 unsigned int len, u8 *out)
58 {
59 struct sha256_ce_state *sctx = shash_desc_ctx(desc);
60 bool finalize = !sctx->sst.count && !(len % SHA256_BLOCK_SIZE) && len;
61
62 if (!crypto_simd_usable()) {
63 if (len)
64 sha256_base_do_update(desc, data, len,
65 (sha256_block_fn *)sha256_block_data_order);
66 sha256_base_do_finalize(desc,
67 (sha256_block_fn *)sha256_block_data_order);
68 return sha256_base_finish(desc, out);
69 }
70
71
72
73
74
75 sctx->finalize = finalize;
76
77 kernel_neon_begin();
78 sha256_base_do_update(desc, data, len,
79 (sha256_block_fn *)sha2_ce_transform);
80 if (!finalize)
81 sha256_base_do_finalize(desc,
82 (sha256_block_fn *)sha2_ce_transform);
83 kernel_neon_end();
84 return sha256_base_finish(desc, out);
85 }
86
87 static int sha256_ce_final(struct shash_desc *desc, u8 *out)
88 {
89 struct sha256_ce_state *sctx = shash_desc_ctx(desc);
90
91 if (!crypto_simd_usable()) {
92 sha256_base_do_finalize(desc,
93 (sha256_block_fn *)sha256_block_data_order);
94 return sha256_base_finish(desc, out);
95 }
96
97 sctx->finalize = 0;
98 kernel_neon_begin();
99 sha256_base_do_finalize(desc, (sha256_block_fn *)sha2_ce_transform);
100 kernel_neon_end();
101 return sha256_base_finish(desc, out);
102 }
103
104 static struct shash_alg algs[] = { {
105 .init = sha224_base_init,
106 .update = sha256_ce_update,
107 .final = sha256_ce_final,
108 .finup = sha256_ce_finup,
109 .descsize = sizeof(struct sha256_ce_state),
110 .digestsize = SHA224_DIGEST_SIZE,
111 .base = {
112 .cra_name = "sha224",
113 .cra_driver_name = "sha224-ce",
114 .cra_priority = 200,
115 .cra_blocksize = SHA256_BLOCK_SIZE,
116 .cra_module = THIS_MODULE,
117 }
118 }, {
119 .init = sha256_base_init,
120 .update = sha256_ce_update,
121 .final = sha256_ce_final,
122 .finup = sha256_ce_finup,
123 .descsize = sizeof(struct sha256_ce_state),
124 .digestsize = SHA256_DIGEST_SIZE,
125 .base = {
126 .cra_name = "sha256",
127 .cra_driver_name = "sha256-ce",
128 .cra_priority = 200,
129 .cra_blocksize = SHA256_BLOCK_SIZE,
130 .cra_module = THIS_MODULE,
131 }
132 } };
133
134 static int __init sha2_ce_mod_init(void)
135 {
136 return crypto_register_shashes(algs, ARRAY_SIZE(algs));
137 }
138
139 static void __exit sha2_ce_mod_fini(void)
140 {
141 crypto_unregister_shashes(algs, ARRAY_SIZE(algs));
142 }
143
144 module_cpu_feature_match(SHA2, sha2_ce_mod_init);
145 module_exit(sha2_ce_mod_fini);