]>
git.ipfire.org Git - thirdparty/linux.git/blob - arch/x86/crypto/blake2s-glue.c
1 // SPDX-License-Identifier: GPL-2.0 OR MIT
3 * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
6 #include <crypto/internal/blake2s.h>
7 #include <crypto/internal/simd.h>
8 #include <crypto/internal/hash.h>
10 #include <linux/types.h>
11 #include <linux/jump_label.h>
12 #include <linux/kernel.h>
13 #include <linux/module.h>
15 #include <asm/cpufeature.h>
16 #include <asm/fpu/api.h>
17 #include <asm/processor.h>
20 asmlinkage
void blake2s_compress_ssse3(struct blake2s_state
*state
,
21 const u8
*block
, const size_t nblocks
,
23 asmlinkage
void blake2s_compress_avx512(struct blake2s_state
*state
,
24 const u8
*block
, const size_t nblocks
,
27 static __ro_after_init
DEFINE_STATIC_KEY_FALSE(blake2s_use_ssse3
);
28 static __ro_after_init
DEFINE_STATIC_KEY_FALSE(blake2s_use_avx512
);
30 void blake2s_compress_arch(struct blake2s_state
*state
,
31 const u8
*block
, size_t nblocks
,
34 /* SIMD disables preemption, so relax after processing each page. */
35 BUILD_BUG_ON(SZ_4K
/ BLAKE2S_BLOCK_SIZE
< 8);
37 if (!static_branch_likely(&blake2s_use_ssse3
) || !crypto_simd_usable()) {
38 blake2s_compress_generic(state
, block
, nblocks
, inc
);
43 const size_t blocks
= min_t(size_t, nblocks
,
44 SZ_4K
/ BLAKE2S_BLOCK_SIZE
);
47 if (IS_ENABLED(CONFIG_AS_AVX512
) &&
48 static_branch_likely(&blake2s_use_avx512
))
49 blake2s_compress_avx512(state
, block
, blocks
, inc
);
51 blake2s_compress_ssse3(state
, block
, blocks
, inc
);
55 block
+= blocks
* BLAKE2S_BLOCK_SIZE
;
58 EXPORT_SYMBOL(blake2s_compress_arch
);
60 static int crypto_blake2s_setkey(struct crypto_shash
*tfm
, const u8
*key
,
63 struct blake2s_tfm_ctx
*tctx
= crypto_shash_ctx(tfm
);
65 if (keylen
== 0 || keylen
> BLAKE2S_KEY_SIZE
)
68 memcpy(tctx
->key
, key
, keylen
);
69 tctx
->keylen
= keylen
;
74 static int crypto_blake2s_init(struct shash_desc
*desc
)
76 struct blake2s_tfm_ctx
*tctx
= crypto_shash_ctx(desc
->tfm
);
77 struct blake2s_state
*state
= shash_desc_ctx(desc
);
78 const int outlen
= crypto_shash_digestsize(desc
->tfm
);
81 blake2s_init_key(state
, outlen
, tctx
->key
, tctx
->keylen
);
83 blake2s_init(state
, outlen
);
88 static int crypto_blake2s_update(struct shash_desc
*desc
, const u8
*in
,
91 struct blake2s_state
*state
= shash_desc_ctx(desc
);
92 const size_t fill
= BLAKE2S_BLOCK_SIZE
- state
->buflen
;
97 memcpy(state
->buf
+ state
->buflen
, in
, fill
);
98 blake2s_compress_arch(state
, state
->buf
, 1, BLAKE2S_BLOCK_SIZE
);
103 if (inlen
> BLAKE2S_BLOCK_SIZE
) {
104 const size_t nblocks
= DIV_ROUND_UP(inlen
, BLAKE2S_BLOCK_SIZE
);
105 /* Hash one less (full) block than strictly possible */
106 blake2s_compress_arch(state
, in
, nblocks
- 1, BLAKE2S_BLOCK_SIZE
);
107 in
+= BLAKE2S_BLOCK_SIZE
* (nblocks
- 1);
108 inlen
-= BLAKE2S_BLOCK_SIZE
* (nblocks
- 1);
110 memcpy(state
->buf
+ state
->buflen
, in
, inlen
);
111 state
->buflen
+= inlen
;
116 static int crypto_blake2s_final(struct shash_desc
*desc
, u8
*out
)
118 struct blake2s_state
*state
= shash_desc_ctx(desc
);
120 blake2s_set_lastblock(state
);
121 memset(state
->buf
+ state
->buflen
, 0,
122 BLAKE2S_BLOCK_SIZE
- state
->buflen
); /* Padding */
123 blake2s_compress_arch(state
, state
->buf
, 1, state
->buflen
);
124 cpu_to_le32_array(state
->h
, ARRAY_SIZE(state
->h
));
125 memcpy(out
, state
->h
, state
->outlen
);
126 memzero_explicit(state
, sizeof(*state
));
131 static struct shash_alg blake2s_algs
[] = {{
132 .base
.cra_name
= "blake2s-128",
133 .base
.cra_driver_name
= "blake2s-128-x86",
134 .base
.cra_flags
= CRYPTO_ALG_OPTIONAL_KEY
,
135 .base
.cra_ctxsize
= sizeof(struct blake2s_tfm_ctx
),
136 .base
.cra_priority
= 200,
137 .base
.cra_blocksize
= BLAKE2S_BLOCK_SIZE
,
138 .base
.cra_module
= THIS_MODULE
,
140 .digestsize
= BLAKE2S_128_HASH_SIZE
,
141 .setkey
= crypto_blake2s_setkey
,
142 .init
= crypto_blake2s_init
,
143 .update
= crypto_blake2s_update
,
144 .final
= crypto_blake2s_final
,
145 .descsize
= sizeof(struct blake2s_state
),
147 .base
.cra_name
= "blake2s-160",
148 .base
.cra_driver_name
= "blake2s-160-x86",
149 .base
.cra_flags
= CRYPTO_ALG_OPTIONAL_KEY
,
150 .base
.cra_ctxsize
= sizeof(struct blake2s_tfm_ctx
),
151 .base
.cra_priority
= 200,
152 .base
.cra_blocksize
= BLAKE2S_BLOCK_SIZE
,
153 .base
.cra_module
= THIS_MODULE
,
155 .digestsize
= BLAKE2S_160_HASH_SIZE
,
156 .setkey
= crypto_blake2s_setkey
,
157 .init
= crypto_blake2s_init
,
158 .update
= crypto_blake2s_update
,
159 .final
= crypto_blake2s_final
,
160 .descsize
= sizeof(struct blake2s_state
),
162 .base
.cra_name
= "blake2s-224",
163 .base
.cra_driver_name
= "blake2s-224-x86",
164 .base
.cra_flags
= CRYPTO_ALG_OPTIONAL_KEY
,
165 .base
.cra_ctxsize
= sizeof(struct blake2s_tfm_ctx
),
166 .base
.cra_priority
= 200,
167 .base
.cra_blocksize
= BLAKE2S_BLOCK_SIZE
,
168 .base
.cra_module
= THIS_MODULE
,
170 .digestsize
= BLAKE2S_224_HASH_SIZE
,
171 .setkey
= crypto_blake2s_setkey
,
172 .init
= crypto_blake2s_init
,
173 .update
= crypto_blake2s_update
,
174 .final
= crypto_blake2s_final
,
175 .descsize
= sizeof(struct blake2s_state
),
177 .base
.cra_name
= "blake2s-256",
178 .base
.cra_driver_name
= "blake2s-256-x86",
179 .base
.cra_flags
= CRYPTO_ALG_OPTIONAL_KEY
,
180 .base
.cra_ctxsize
= sizeof(struct blake2s_tfm_ctx
),
181 .base
.cra_priority
= 200,
182 .base
.cra_blocksize
= BLAKE2S_BLOCK_SIZE
,
183 .base
.cra_module
= THIS_MODULE
,
185 .digestsize
= BLAKE2S_256_HASH_SIZE
,
186 .setkey
= crypto_blake2s_setkey
,
187 .init
= crypto_blake2s_init
,
188 .update
= crypto_blake2s_update
,
189 .final
= crypto_blake2s_final
,
190 .descsize
= sizeof(struct blake2s_state
),
193 static int __init
blake2s_mod_init(void)
195 if (!boot_cpu_has(X86_FEATURE_SSSE3
))
198 static_branch_enable(&blake2s_use_ssse3
);
200 if (IS_ENABLED(CONFIG_AS_AVX512
) &&
201 boot_cpu_has(X86_FEATURE_AVX
) &&
202 boot_cpu_has(X86_FEATURE_AVX2
) &&
203 boot_cpu_has(X86_FEATURE_AVX512F
) &&
204 boot_cpu_has(X86_FEATURE_AVX512VL
) &&
205 cpu_has_xfeatures(XFEATURE_MASK_SSE
| XFEATURE_MASK_YMM
|
206 XFEATURE_MASK_AVX512
, NULL
))
207 static_branch_enable(&blake2s_use_avx512
);
209 return IS_REACHABLE(CONFIG_CRYPTO_HASH
) ?
210 crypto_register_shashes(blake2s_algs
,
211 ARRAY_SIZE(blake2s_algs
)) : 0;
214 static void __exit
blake2s_mod_exit(void)
216 if (IS_REACHABLE(CONFIG_CRYPTO_HASH
) && boot_cpu_has(X86_FEATURE_SSSE3
))
217 crypto_unregister_shashes(blake2s_algs
, ARRAY_SIZE(blake2s_algs
));
220 module_init(blake2s_mod_init
);
221 module_exit(blake2s_mod_exit
);
223 MODULE_ALIAS_CRYPTO("blake2s-128");
224 MODULE_ALIAS_CRYPTO("blake2s-128-x86");
225 MODULE_ALIAS_CRYPTO("blake2s-160");
226 MODULE_ALIAS_CRYPTO("blake2s-160-x86");
227 MODULE_ALIAS_CRYPTO("blake2s-224");
228 MODULE_ALIAS_CRYPTO("blake2s-224-x86");
229 MODULE_ALIAS_CRYPTO("blake2s-256");
230 MODULE_ALIAS_CRYPTO("blake2s-256-x86");
231 MODULE_LICENSE("GPL v2");