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TOMOYO Linux Cross Reference
Linux/arch/x86/crypto/sha256_ssse3_glue.c

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  1 /*
  2  * Cryptographic API.
  3  *
  4  * Glue code for the SHA256 Secure Hash Algorithm assembler
  5  * implementation using supplemental SSE3 / AVX / AVX2 instructions.
  6  *
  7  * This file is based on sha256_generic.c
  8  *
  9  * Copyright (C) 2013 Intel Corporation.
 10  *
 11  * Author:
 12  *     Tim Chen <tim.c.chen@linux.intel.com>
 13  *
 14  * This program is free software; you can redistribute it and/or modify it
 15  * under the terms of the GNU General Public License as published by the Free
 16  * Software Foundation; either version 2 of the License, or (at your option)
 17  * any later version.
 18  *
 19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 20  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 22  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 23  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 24  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 25  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 26  * SOFTWARE.
 27  */
 28 
 29 
 30 #define pr_fmt(fmt)     KBUILD_MODNAME ": " fmt
 31 
 32 #include <crypto/internal/hash.h>
 33 #include <linux/init.h>
 34 #include <linux/module.h>
 35 #include <linux/mm.h>
 36 #include <linux/cryptohash.h>
 37 #include <linux/types.h>
 38 #include <crypto/sha.h>
 39 #include <crypto/sha256_base.h>
 40 #include <asm/fpu/api.h>
 41 #include <linux/string.h>
 42 
 43 asmlinkage void sha256_transform_ssse3(u32 *digest, const char *data,
 44                                        u64 rounds);
 45 typedef void (sha256_transform_fn)(u32 *digest, const char *data, u64 rounds);
 46 
 47 static int sha256_update(struct shash_desc *desc, const u8 *data,
 48                          unsigned int len, sha256_transform_fn *sha256_xform)
 49 {
 50         struct sha256_state *sctx = shash_desc_ctx(desc);
 51 
 52         if (!irq_fpu_usable() ||
 53             (sctx->count % SHA256_BLOCK_SIZE) + len < SHA256_BLOCK_SIZE)
 54                 return crypto_sha256_update(desc, data, len);
 55 
 56         /* make sure casting to sha256_block_fn() is safe */
 57         BUILD_BUG_ON(offsetof(struct sha256_state, state) != 0);
 58 
 59         kernel_fpu_begin();
 60         sha256_base_do_update(desc, data, len,
 61                               (sha256_block_fn *)sha256_xform);
 62         kernel_fpu_end();
 63 
 64         return 0;
 65 }
 66 
 67 static int sha256_finup(struct shash_desc *desc, const u8 *data,
 68               unsigned int len, u8 *out, sha256_transform_fn *sha256_xform)
 69 {
 70         if (!irq_fpu_usable())
 71                 return crypto_sha256_finup(desc, data, len, out);
 72 
 73         kernel_fpu_begin();
 74         if (len)
 75                 sha256_base_do_update(desc, data, len,
 76                                       (sha256_block_fn *)sha256_xform);
 77         sha256_base_do_finalize(desc, (sha256_block_fn *)sha256_xform);
 78         kernel_fpu_end();
 79 
 80         return sha256_base_finish(desc, out);
 81 }
 82 
 83 static int sha256_ssse3_update(struct shash_desc *desc, const u8 *data,
 84                          unsigned int len)
 85 {
 86         return sha256_update(desc, data, len, sha256_transform_ssse3);
 87 }
 88 
 89 static int sha256_ssse3_finup(struct shash_desc *desc, const u8 *data,
 90               unsigned int len, u8 *out)
 91 {
 92         return sha256_finup(desc, data, len, out, sha256_transform_ssse3);
 93 }
 94 
 95 /* Add padding and return the message digest. */
 96 static int sha256_ssse3_final(struct shash_desc *desc, u8 *out)
 97 {
 98         return sha256_ssse3_finup(desc, NULL, 0, out);
 99 }
100 
101 static struct shash_alg sha256_ssse3_algs[] = { {
102         .digestsize     =       SHA256_DIGEST_SIZE,
103         .init           =       sha256_base_init,
104         .update         =       sha256_ssse3_update,
105         .final          =       sha256_ssse3_final,
106         .finup          =       sha256_ssse3_finup,
107         .descsize       =       sizeof(struct sha256_state),
108         .base           =       {
109                 .cra_name       =       "sha256",
110                 .cra_driver_name =      "sha256-ssse3",
111                 .cra_priority   =       150,
112                 .cra_flags      =       CRYPTO_ALG_TYPE_SHASH,
113                 .cra_blocksize  =       SHA256_BLOCK_SIZE,
114                 .cra_module     =       THIS_MODULE,
115         }
116 }, {
117         .digestsize     =       SHA224_DIGEST_SIZE,
118         .init           =       sha224_base_init,
119         .update         =       sha256_ssse3_update,
120         .final          =       sha256_ssse3_final,
121         .finup          =       sha256_ssse3_finup,
122         .descsize       =       sizeof(struct sha256_state),
123         .base           =       {
124                 .cra_name       =       "sha224",
125                 .cra_driver_name =      "sha224-ssse3",
126                 .cra_priority   =       150,
127                 .cra_flags      =       CRYPTO_ALG_TYPE_SHASH,
128                 .cra_blocksize  =       SHA224_BLOCK_SIZE,
129                 .cra_module     =       THIS_MODULE,
130         }
131 } };
132 
133 static int register_sha256_ssse3(void)
134 {
135         if (boot_cpu_has(X86_FEATURE_SSSE3))
136                 return crypto_register_shashes(sha256_ssse3_algs,
137                                 ARRAY_SIZE(sha256_ssse3_algs));
138         return 0;
139 }
140 
141 static void unregister_sha256_ssse3(void)
142 {
143         if (boot_cpu_has(X86_FEATURE_SSSE3))
144                 crypto_unregister_shashes(sha256_ssse3_algs,
145                                 ARRAY_SIZE(sha256_ssse3_algs));
146 }
147 
148 #ifdef CONFIG_AS_AVX
149 asmlinkage void sha256_transform_avx(u32 *digest, const char *data,
150                                      u64 rounds);
151 
152 static int sha256_avx_update(struct shash_desc *desc, const u8 *data,
153                          unsigned int len)
154 {
155         return sha256_update(desc, data, len, sha256_transform_avx);
156 }
157 
158 static int sha256_avx_finup(struct shash_desc *desc, const u8 *data,
159                       unsigned int len, u8 *out)
160 {
161         return sha256_finup(desc, data, len, out, sha256_transform_avx);
162 }
163 
164 static int sha256_avx_final(struct shash_desc *desc, u8 *out)
165 {
166         return sha256_avx_finup(desc, NULL, 0, out);
167 }
168 
169 static struct shash_alg sha256_avx_algs[] = { {
170         .digestsize     =       SHA256_DIGEST_SIZE,
171         .init           =       sha256_base_init,
172         .update         =       sha256_avx_update,
173         .final          =       sha256_avx_final,
174         .finup          =       sha256_avx_finup,
175         .descsize       =       sizeof(struct sha256_state),
176         .base           =       {
177                 .cra_name       =       "sha256",
178                 .cra_driver_name =      "sha256-avx",
179                 .cra_priority   =       160,
180                 .cra_flags      =       CRYPTO_ALG_TYPE_SHASH,
181                 .cra_blocksize  =       SHA256_BLOCK_SIZE,
182                 .cra_module     =       THIS_MODULE,
183         }
184 }, {
185         .digestsize     =       SHA224_DIGEST_SIZE,
186         .init           =       sha224_base_init,
187         .update         =       sha256_avx_update,
188         .final          =       sha256_avx_final,
189         .finup          =       sha256_avx_finup,
190         .descsize       =       sizeof(struct sha256_state),
191         .base           =       {
192                 .cra_name       =       "sha224",
193                 .cra_driver_name =      "sha224-avx",
194                 .cra_priority   =       160,
195                 .cra_flags      =       CRYPTO_ALG_TYPE_SHASH,
196                 .cra_blocksize  =       SHA224_BLOCK_SIZE,
197                 .cra_module     =       THIS_MODULE,
198         }
199 } };
200 
201 static bool avx_usable(void)
202 {
203         if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL)) {
204                 if (boot_cpu_has(X86_FEATURE_AVX))
205                         pr_info("AVX detected but unusable.\n");
206                 return false;
207         }
208 
209         return true;
210 }
211 
212 static int register_sha256_avx(void)
213 {
214         if (avx_usable())
215                 return crypto_register_shashes(sha256_avx_algs,
216                                 ARRAY_SIZE(sha256_avx_algs));
217         return 0;
218 }
219 
220 static void unregister_sha256_avx(void)
221 {
222         if (avx_usable())
223                 crypto_unregister_shashes(sha256_avx_algs,
224                                 ARRAY_SIZE(sha256_avx_algs));
225 }
226 
227 #else
228 static inline int register_sha256_avx(void) { return 0; }
229 static inline void unregister_sha256_avx(void) { }
230 #endif
231 
232 #if defined(CONFIG_AS_AVX2) && defined(CONFIG_AS_AVX)
233 asmlinkage void sha256_transform_rorx(u32 *digest, const char *data,
234                                       u64 rounds);
235 
236 static int sha256_avx2_update(struct shash_desc *desc, const u8 *data,
237                          unsigned int len)
238 {
239         return sha256_update(desc, data, len, sha256_transform_rorx);
240 }
241 
242 static int sha256_avx2_finup(struct shash_desc *desc, const u8 *data,
243                       unsigned int len, u8 *out)
244 {
245         return sha256_finup(desc, data, len, out, sha256_transform_rorx);
246 }
247 
248 static int sha256_avx2_final(struct shash_desc *desc, u8 *out)
249 {
250         return sha256_avx2_finup(desc, NULL, 0, out);
251 }
252 
253 static struct shash_alg sha256_avx2_algs[] = { {
254         .digestsize     =       SHA256_DIGEST_SIZE,
255         .init           =       sha256_base_init,
256         .update         =       sha256_avx2_update,
257         .final          =       sha256_avx2_final,
258         .finup          =       sha256_avx2_finup,
259         .descsize       =       sizeof(struct sha256_state),
260         .base           =       {
261                 .cra_name       =       "sha256",
262                 .cra_driver_name =      "sha256-avx2",
263                 .cra_priority   =       170,
264                 .cra_flags      =       CRYPTO_ALG_TYPE_SHASH,
265                 .cra_blocksize  =       SHA256_BLOCK_SIZE,
266                 .cra_module     =       THIS_MODULE,
267         }
268 }, {
269         .digestsize     =       SHA224_DIGEST_SIZE,
270         .init           =       sha224_base_init,
271         .update         =       sha256_avx2_update,
272         .final          =       sha256_avx2_final,
273         .finup          =       sha256_avx2_finup,
274         .descsize       =       sizeof(struct sha256_state),
275         .base           =       {
276                 .cra_name       =       "sha224",
277                 .cra_driver_name =      "sha224-avx2",
278                 .cra_priority   =       170,
279                 .cra_flags      =       CRYPTO_ALG_TYPE_SHASH,
280                 .cra_blocksize  =       SHA224_BLOCK_SIZE,
281                 .cra_module     =       THIS_MODULE,
282         }
283 } };
284 
285 static bool avx2_usable(void)
286 {
287         if (avx_usable() && boot_cpu_has(X86_FEATURE_AVX2) &&
288                     boot_cpu_has(X86_FEATURE_BMI2))
289                 return true;
290 
291         return false;
292 }
293 
294 static int register_sha256_avx2(void)
295 {
296         if (avx2_usable())
297                 return crypto_register_shashes(sha256_avx2_algs,
298                                 ARRAY_SIZE(sha256_avx2_algs));
299         return 0;
300 }
301 
302 static void unregister_sha256_avx2(void)
303 {
304         if (avx2_usable())
305                 crypto_unregister_shashes(sha256_avx2_algs,
306                                 ARRAY_SIZE(sha256_avx2_algs));
307 }
308 
309 #else
310 static inline int register_sha256_avx2(void) { return 0; }
311 static inline void unregister_sha256_avx2(void) { }
312 #endif
313 
314 #ifdef CONFIG_AS_SHA256_NI
315 asmlinkage void sha256_ni_transform(u32 *digest, const char *data,
316                                    u64 rounds); /*unsigned int rounds);*/
317 
318 static int sha256_ni_update(struct shash_desc *desc, const u8 *data,
319                          unsigned int len)
320 {
321         return sha256_update(desc, data, len, sha256_ni_transform);
322 }
323 
324 static int sha256_ni_finup(struct shash_desc *desc, const u8 *data,
325                       unsigned int len, u8 *out)
326 {
327         return sha256_finup(desc, data, len, out, sha256_ni_transform);
328 }
329 
330 static int sha256_ni_final(struct shash_desc *desc, u8 *out)
331 {
332         return sha256_ni_finup(desc, NULL, 0, out);
333 }
334 
335 static struct shash_alg sha256_ni_algs[] = { {
336         .digestsize     =       SHA256_DIGEST_SIZE,
337         .init           =       sha256_base_init,
338         .update         =       sha256_ni_update,
339         .final          =       sha256_ni_final,
340         .finup          =       sha256_ni_finup,
341         .descsize       =       sizeof(struct sha256_state),
342         .base           =       {
343                 .cra_name       =       "sha256",
344                 .cra_driver_name =      "sha256-ni",
345                 .cra_priority   =       250,
346                 .cra_flags      =       CRYPTO_ALG_TYPE_SHASH,
347                 .cra_blocksize  =       SHA256_BLOCK_SIZE,
348                 .cra_module     =       THIS_MODULE,
349         }
350 }, {
351         .digestsize     =       SHA224_DIGEST_SIZE,
352         .init           =       sha224_base_init,
353         .update         =       sha256_ni_update,
354         .final          =       sha256_ni_final,
355         .finup          =       sha256_ni_finup,
356         .descsize       =       sizeof(struct sha256_state),
357         .base           =       {
358                 .cra_name       =       "sha224",
359                 .cra_driver_name =      "sha224-ni",
360                 .cra_priority   =       250,
361                 .cra_flags      =       CRYPTO_ALG_TYPE_SHASH,
362                 .cra_blocksize  =       SHA224_BLOCK_SIZE,
363                 .cra_module     =       THIS_MODULE,
364         }
365 } };
366 
367 static int register_sha256_ni(void)
368 {
369         if (boot_cpu_has(X86_FEATURE_SHA_NI))
370                 return crypto_register_shashes(sha256_ni_algs,
371                                 ARRAY_SIZE(sha256_ni_algs));
372         return 0;
373 }
374 
375 static void unregister_sha256_ni(void)
376 {
377         if (boot_cpu_has(X86_FEATURE_SHA_NI))
378                 crypto_unregister_shashes(sha256_ni_algs,
379                                 ARRAY_SIZE(sha256_ni_algs));
380 }
381 
382 #else
383 static inline int register_sha256_ni(void) { return 0; }
384 static inline void unregister_sha256_ni(void) { }
385 #endif
386 
387 static int __init sha256_ssse3_mod_init(void)
388 {
389         if (register_sha256_ssse3())
390                 goto fail;
391 
392         if (register_sha256_avx()) {
393                 unregister_sha256_ssse3();
394                 goto fail;
395         }
396 
397         if (register_sha256_avx2()) {
398                 unregister_sha256_avx();
399                 unregister_sha256_ssse3();
400                 goto fail;
401         }
402 
403         if (register_sha256_ni()) {
404                 unregister_sha256_avx2();
405                 unregister_sha256_avx();
406                 unregister_sha256_ssse3();
407                 goto fail;
408         }
409 
410         return 0;
411 fail:
412         return -ENODEV;
413 }
414 
415 static void __exit sha256_ssse3_mod_fini(void)
416 {
417         unregister_sha256_ni();
418         unregister_sha256_avx2();
419         unregister_sha256_avx();
420         unregister_sha256_ssse3();
421 }
422 
423 module_init(sha256_ssse3_mod_init);
424 module_exit(sha256_ssse3_mod_fini);
425 
426 MODULE_LICENSE("GPL");
427 MODULE_DESCRIPTION("SHA256 Secure Hash Algorithm, Supplemental SSE3 accelerated");
428 
429 MODULE_ALIAS_CRYPTO("sha256");
430 MODULE_ALIAS_CRYPTO("sha256-ssse3");
431 MODULE_ALIAS_CRYPTO("sha256-avx");
432 MODULE_ALIAS_CRYPTO("sha256-avx2");
433 MODULE_ALIAS_CRYPTO("sha224");
434 MODULE_ALIAS_CRYPTO("sha224-ssse3");
435 MODULE_ALIAS_CRYPTO("sha224-avx");
436 MODULE_ALIAS_CRYPTO("sha224-avx2");
437 #ifdef CONFIG_AS_SHA256_NI
438 MODULE_ALIAS_CRYPTO("sha256-ni");
439 MODULE_ALIAS_CRYPTO("sha224-ni");
440 #endif
441 

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