Commit | Line | Data |
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66be8951 MK |
1 | /* |
2 | * Cryptographic API. | |
3 | * | |
4 | * Glue code for the SHA1 Secure Hash Algorithm assembler implementation using | |
5 | * Supplemental SSE3 instructions. | |
6 | * | |
7 | * This file is based on sha1_generic.c | |
8 | * | |
9 | * Copyright (c) Alan Smithee. | |
10 | * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> | |
11 | * Copyright (c) Jean-Francois Dive <jef@linuxbe.org> | |
12 | * Copyright (c) Mathias Krause <minipli@googlemail.com> | |
7c1da8d0 | 13 | * Copyright (c) Chandramouli Narayanan <mouli@linux.intel.com> |
66be8951 MK |
14 | * |
15 | * This program is free software; you can redistribute it and/or modify it | |
16 | * under the terms of the GNU General Public License as published by the Free | |
17 | * Software Foundation; either version 2 of the License, or (at your option) | |
18 | * any later version. | |
19 | * | |
20 | */ | |
21 | ||
22 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
23 | ||
24 | #include <crypto/internal/hash.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/mm.h> | |
28 | #include <linux/cryptohash.h> | |
29 | #include <linux/types.h> | |
30 | #include <crypto/sha.h> | |
824b4376 | 31 | #include <crypto/sha1_base.h> |
df6b35f4 | 32 | #include <asm/fpu/api.h> |
66be8951 | 33 | |
85c66ecd | 34 | typedef void (sha1_transform_fn)(u32 *digest, const char *data, |
35 | unsigned int rounds); | |
66be8951 | 36 | |
85c66ecd | 37 | static int sha1_update(struct shash_desc *desc, const u8 *data, |
38 | unsigned int len, sha1_transform_fn *sha1_xform) | |
66be8951 MK |
39 | { |
40 | struct sha1_state *sctx = shash_desc_ctx(desc); | |
66be8951 | 41 | |
824b4376 AB |
42 | if (!irq_fpu_usable() || |
43 | (sctx->count % SHA1_BLOCK_SIZE) + len < SHA1_BLOCK_SIZE) | |
44 | return crypto_sha1_update(desc, data, len); | |
66be8951 | 45 | |
824b4376 AB |
46 | /* make sure casting to sha1_block_fn() is safe */ |
47 | BUILD_BUG_ON(offsetof(struct sha1_state, state) != 0); | |
66be8951 | 48 | |
824b4376 AB |
49 | kernel_fpu_begin(); |
50 | sha1_base_do_update(desc, data, len, | |
85c66ecd | 51 | (sha1_block_fn *)sha1_xform); |
824b4376 | 52 | kernel_fpu_end(); |
66be8951 MK |
53 | |
54 | return 0; | |
55 | } | |
56 | ||
85c66ecd | 57 | static int sha1_finup(struct shash_desc *desc, const u8 *data, |
58 | unsigned int len, u8 *out, sha1_transform_fn *sha1_xform) | |
66be8951 | 59 | { |
824b4376 AB |
60 | if (!irq_fpu_usable()) |
61 | return crypto_sha1_finup(desc, data, len, out); | |
66be8951 | 62 | |
824b4376 AB |
63 | kernel_fpu_begin(); |
64 | if (len) | |
65 | sha1_base_do_update(desc, data, len, | |
85c66ecd | 66 | (sha1_block_fn *)sha1_xform); |
67 | sha1_base_do_finalize(desc, (sha1_block_fn *)sha1_xform); | |
824b4376 | 68 | kernel_fpu_end(); |
66be8951 | 69 | |
824b4376 | 70 | return sha1_base_finish(desc, out); |
66be8951 MK |
71 | } |
72 | ||
85c66ecd | 73 | asmlinkage void sha1_transform_ssse3(u32 *digest, const char *data, |
74 | unsigned int rounds); | |
75 | ||
76 | static int sha1_ssse3_update(struct shash_desc *desc, const u8 *data, | |
77 | unsigned int len) | |
66be8951 | 78 | { |
85c66ecd | 79 | return sha1_update(desc, data, len, |
80 | (sha1_transform_fn *) sha1_transform_ssse3); | |
66be8951 MK |
81 | } |
82 | ||
85c66ecd | 83 | static int sha1_ssse3_finup(struct shash_desc *desc, const u8 *data, |
84 | unsigned int len, u8 *out) | |
7c1da8d0 | 85 | { |
85c66ecd | 86 | return sha1_finup(desc, data, len, out, |
87 | (sha1_transform_fn *) sha1_transform_ssse3); | |
88 | } | |
89 | ||
90 | /* Add padding and return the message digest. */ | |
91 | static int sha1_ssse3_final(struct shash_desc *desc, u8 *out) | |
92 | { | |
93 | return sha1_ssse3_finup(desc, NULL, 0, out); | |
7c1da8d0 | 94 | } |
7c1da8d0 | 95 | |
85c66ecd | 96 | static struct shash_alg sha1_ssse3_alg = { |
66be8951 | 97 | .digestsize = SHA1_DIGEST_SIZE, |
824b4376 | 98 | .init = sha1_base_init, |
66be8951 MK |
99 | .update = sha1_ssse3_update, |
100 | .final = sha1_ssse3_final, | |
824b4376 | 101 | .finup = sha1_ssse3_finup, |
66be8951 | 102 | .descsize = sizeof(struct sha1_state), |
66be8951 MK |
103 | .base = { |
104 | .cra_name = "sha1", | |
85c66ecd | 105 | .cra_driver_name = "sha1-ssse3", |
66be8951 MK |
106 | .cra_priority = 150, |
107 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, | |
108 | .cra_blocksize = SHA1_BLOCK_SIZE, | |
109 | .cra_module = THIS_MODULE, | |
110 | } | |
111 | }; | |
112 | ||
85c66ecd | 113 | static int register_sha1_ssse3(void) |
114 | { | |
115 | if (boot_cpu_has(X86_FEATURE_SSSE3)) | |
116 | return crypto_register_shash(&sha1_ssse3_alg); | |
117 | return 0; | |
118 | } | |
119 | ||
120 | static void unregister_sha1_ssse3(void) | |
121 | { | |
122 | if (boot_cpu_has(X86_FEATURE_SSSE3)) | |
123 | crypto_unregister_shash(&sha1_ssse3_alg); | |
124 | } | |
125 | ||
65df5774 | 126 | #ifdef CONFIG_AS_AVX |
85c66ecd | 127 | asmlinkage void sha1_transform_avx(u32 *digest, const char *data, |
128 | unsigned int rounds); | |
129 | ||
130 | static int sha1_avx_update(struct shash_desc *desc, const u8 *data, | |
131 | unsigned int len) | |
132 | { | |
133 | return sha1_update(desc, data, len, | |
134 | (sha1_transform_fn *) sha1_transform_avx); | |
135 | } | |
136 | ||
137 | static int sha1_avx_finup(struct shash_desc *desc, const u8 *data, | |
138 | unsigned int len, u8 *out) | |
139 | { | |
140 | return sha1_finup(desc, data, len, out, | |
141 | (sha1_transform_fn *) sha1_transform_avx); | |
142 | } | |
143 | ||
144 | static int sha1_avx_final(struct shash_desc *desc, u8 *out) | |
145 | { | |
146 | return sha1_avx_finup(desc, NULL, 0, out); | |
147 | } | |
148 | ||
149 | static struct shash_alg sha1_avx_alg = { | |
150 | .digestsize = SHA1_DIGEST_SIZE, | |
151 | .init = sha1_base_init, | |
152 | .update = sha1_avx_update, | |
153 | .final = sha1_avx_final, | |
154 | .finup = sha1_avx_finup, | |
155 | .descsize = sizeof(struct sha1_state), | |
156 | .base = { | |
157 | .cra_name = "sha1", | |
158 | .cra_driver_name = "sha1-avx", | |
159 | .cra_priority = 160, | |
160 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, | |
161 | .cra_blocksize = SHA1_BLOCK_SIZE, | |
162 | .cra_module = THIS_MODULE, | |
163 | } | |
164 | }; | |
165 | ||
166 | static bool avx_usable(void) | |
66be8951 | 167 | { |
d91cab78 | 168 | if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL)) { |
d1e50966 IM |
169 | if (cpu_has_avx) |
170 | pr_info("AVX detected but unusable.\n"); | |
66be8951 MK |
171 | return false; |
172 | } | |
173 | ||
174 | return true; | |
175 | } | |
6ca5afb8 | 176 | |
85c66ecd | 177 | static int register_sha1_avx(void) |
178 | { | |
179 | if (avx_usable()) | |
180 | return crypto_register_shash(&sha1_avx_alg); | |
181 | return 0; | |
182 | } | |
183 | ||
184 | static void unregister_sha1_avx(void) | |
6ca5afb8 | 185 | { |
85c66ecd | 186 | if (avx_usable()) |
187 | crypto_unregister_shash(&sha1_avx_alg); | |
188 | } | |
189 | ||
190 | #else /* CONFIG_AS_AVX */ | |
191 | static inline int register_sha1_avx(void) { return 0; } | |
192 | static inline void unregister_sha1_avx(void) { } | |
193 | #endif /* CONFIG_AS_AVX */ | |
194 | ||
195 | ||
196 | #if defined(CONFIG_AS_AVX2) && (CONFIG_AS_AVX) | |
197 | #define SHA1_AVX2_BLOCK_OPTSIZE 4 /* optimal 4*64 bytes of SHA1 blocks */ | |
198 | ||
199 | asmlinkage void sha1_transform_avx2(u32 *digest, const char *data, | |
200 | unsigned int rounds); | |
201 | ||
202 | static bool avx2_usable(void) | |
6ca5afb8 | 203 | { |
85c66ecd | 204 | if (avx_usable() && boot_cpu_has(X86_FEATURE_AVX2) |
205 | && boot_cpu_has(X86_FEATURE_BMI1) | |
206 | && boot_cpu_has(X86_FEATURE_BMI2)) | |
6ca5afb8 MK |
207 | return true; |
208 | ||
209 | return false; | |
210 | } | |
66be8951 | 211 | |
85c66ecd | 212 | static void sha1_apply_transform_avx2(u32 *digest, const char *data, |
213 | unsigned int rounds) | |
66be8951 | 214 | { |
85c66ecd | 215 | /* Select the optimal transform based on data block size */ |
216 | if (rounds >= SHA1_AVX2_BLOCK_OPTSIZE) | |
217 | sha1_transform_avx2(digest, data, rounds); | |
218 | else | |
219 | sha1_transform_avx(digest, data, rounds); | |
220 | } | |
6ca5afb8 | 221 | |
85c66ecd | 222 | static int sha1_avx2_update(struct shash_desc *desc, const u8 *data, |
223 | unsigned int len) | |
224 | { | |
225 | return sha1_update(desc, data, len, | |
226 | (sha1_transform_fn *) sha1_apply_transform_avx2); | |
227 | } | |
66be8951 | 228 | |
85c66ecd | 229 | static int sha1_avx2_finup(struct shash_desc *desc, const u8 *data, |
230 | unsigned int len, u8 *out) | |
231 | { | |
232 | return sha1_finup(desc, data, len, out, | |
233 | (sha1_transform_fn *) sha1_apply_transform_avx2); | |
234 | } | |
235 | ||
236 | static int sha1_avx2_final(struct shash_desc *desc, u8 *out) | |
237 | { | |
238 | return sha1_avx2_finup(desc, NULL, 0, out); | |
239 | } | |
240 | ||
241 | static struct shash_alg sha1_avx2_alg = { | |
242 | .digestsize = SHA1_DIGEST_SIZE, | |
243 | .init = sha1_base_init, | |
244 | .update = sha1_avx2_update, | |
245 | .final = sha1_avx2_final, | |
246 | .finup = sha1_avx2_finup, | |
247 | .descsize = sizeof(struct sha1_state), | |
248 | .base = { | |
249 | .cra_name = "sha1", | |
250 | .cra_driver_name = "sha1-avx2", | |
251 | .cra_priority = 170, | |
252 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, | |
253 | .cra_blocksize = SHA1_BLOCK_SIZE, | |
254 | .cra_module = THIS_MODULE, | |
7c1da8d0 | 255 | } |
85c66ecd | 256 | }; |
257 | ||
258 | static int register_sha1_avx2(void) | |
259 | { | |
260 | if (avx2_usable()) | |
261 | return crypto_register_shash(&sha1_avx2_alg); | |
262 | return 0; | |
263 | } | |
264 | ||
265 | static void unregister_sha1_avx2(void) | |
266 | { | |
267 | if (avx2_usable()) | |
268 | crypto_unregister_shash(&sha1_avx2_alg); | |
269 | } | |
270 | ||
271 | #else | |
272 | static inline int register_sha1_avx2(void) { return 0; } | |
273 | static inline void unregister_sha1_avx2(void) { } | |
6ca5afb8 | 274 | #endif |
85c66ecd | 275 | |
95fca7df | 276 | #ifdef CONFIG_AS_SHA1_NI |
85c66ecd | 277 | asmlinkage void sha1_ni_transform(u32 *digest, const char *data, |
278 | unsigned int rounds); | |
279 | ||
280 | static int sha1_ni_update(struct shash_desc *desc, const u8 *data, | |
281 | unsigned int len) | |
282 | { | |
283 | return sha1_update(desc, data, len, | |
284 | (sha1_transform_fn *) sha1_ni_transform); | |
285 | } | |
286 | ||
287 | static int sha1_ni_finup(struct shash_desc *desc, const u8 *data, | |
288 | unsigned int len, u8 *out) | |
289 | { | |
290 | return sha1_finup(desc, data, len, out, | |
291 | (sha1_transform_fn *) sha1_ni_transform); | |
292 | } | |
293 | ||
294 | static int sha1_ni_final(struct shash_desc *desc, u8 *out) | |
295 | { | |
296 | return sha1_ni_finup(desc, NULL, 0, out); | |
297 | } | |
298 | ||
299 | static struct shash_alg sha1_ni_alg = { | |
300 | .digestsize = SHA1_DIGEST_SIZE, | |
301 | .init = sha1_base_init, | |
302 | .update = sha1_ni_update, | |
303 | .final = sha1_ni_final, | |
304 | .finup = sha1_ni_finup, | |
305 | .descsize = sizeof(struct sha1_state), | |
306 | .base = { | |
307 | .cra_name = "sha1", | |
308 | .cra_driver_name = "sha1-ni", | |
309 | .cra_priority = 250, | |
310 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, | |
311 | .cra_blocksize = SHA1_BLOCK_SIZE, | |
312 | .cra_module = THIS_MODULE, | |
95fca7df | 313 | } |
85c66ecd | 314 | }; |
315 | ||
316 | static int register_sha1_ni(void) | |
317 | { | |
318 | if (boot_cpu_has(X86_FEATURE_SHA_NI)) | |
319 | return crypto_register_shash(&sha1_ni_alg); | |
320 | return 0; | |
321 | } | |
322 | ||
323 | static void unregister_sha1_ni(void) | |
324 | { | |
325 | if (boot_cpu_has(X86_FEATURE_SHA_NI)) | |
326 | crypto_unregister_shash(&sha1_ni_alg); | |
327 | } | |
328 | ||
329 | #else | |
330 | static inline int register_sha1_ni(void) { return 0; } | |
331 | static inline void unregister_sha1_ni(void) { } | |
66be8951 MK |
332 | #endif |
333 | ||
334 | static int __init sha1_ssse3_mod_init(void) | |
335 | { | |
85c66ecd | 336 | if (register_sha1_ssse3()) |
337 | goto fail; | |
6ca5afb8 | 338 | |
85c66ecd | 339 | if (register_sha1_avx()) { |
340 | unregister_sha1_ssse3(); | |
341 | goto fail; | |
7c1da8d0 | 342 | } |
66be8951 | 343 | |
85c66ecd | 344 | if (register_sha1_avx2()) { |
345 | unregister_sha1_avx(); | |
346 | unregister_sha1_ssse3(); | |
347 | goto fail; | |
7c1da8d0 | 348 | } |
66be8951 | 349 | |
85c66ecd | 350 | if (register_sha1_ni()) { |
351 | unregister_sha1_avx2(); | |
352 | unregister_sha1_avx(); | |
353 | unregister_sha1_ssse3(); | |
354 | goto fail; | |
66be8951 | 355 | } |
66be8951 | 356 | |
85c66ecd | 357 | return 0; |
358 | fail: | |
66be8951 MK |
359 | return -ENODEV; |
360 | } | |
361 | ||
362 | static void __exit sha1_ssse3_mod_fini(void) | |
363 | { | |
85c66ecd | 364 | unregister_sha1_ni(); |
365 | unregister_sha1_avx2(); | |
366 | unregister_sha1_avx(); | |
367 | unregister_sha1_ssse3(); | |
66be8951 MK |
368 | } |
369 | ||
370 | module_init(sha1_ssse3_mod_init); | |
371 | module_exit(sha1_ssse3_mod_fini); | |
372 | ||
373 | MODULE_LICENSE("GPL"); | |
374 | MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm, Supplemental SSE3 accelerated"); | |
375 | ||
5d26a105 | 376 | MODULE_ALIAS_CRYPTO("sha1"); |