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54b6a1bd HY |
1 | /* |
2 | * Support for Intel AES-NI instructions. This file contains glue | |
3 | * code, the real AES implementation is in intel-aes_asm.S. | |
4 | * | |
5 | * Copyright (C) 2008, Intel Corp. | |
6 | * Author: Huang Ying <ying.huang@intel.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | */ | |
13 | ||
14 | #include <linux/hardirq.h> | |
15 | #include <linux/types.h> | |
16 | #include <linux/crypto.h> | |
17 | #include <linux/err.h> | |
18 | #include <crypto/algapi.h> | |
19 | #include <crypto/aes.h> | |
20 | #include <crypto/cryptd.h> | |
21 | #include <asm/i387.h> | |
22 | #include <asm/aes.h> | |
23 | ||
2cf4ac8b HY |
24 | #if defined(CONFIG_CRYPTO_CTR) || defined(CONFIG_CRYPTO_CTR_MODULE) |
25 | #define HAS_CTR | |
26 | #endif | |
27 | ||
28 | #if defined(CONFIG_CRYPTO_LRW) || defined(CONFIG_CRYPTO_LRW_MODULE) | |
29 | #define HAS_LRW | |
30 | #endif | |
31 | ||
32 | #if defined(CONFIG_CRYPTO_PCBC) || defined(CONFIG_CRYPTO_PCBC_MODULE) | |
33 | #define HAS_PCBC | |
34 | #endif | |
35 | ||
36 | #if defined(CONFIG_CRYPTO_XTS) || defined(CONFIG_CRYPTO_XTS_MODULE) | |
37 | #define HAS_XTS | |
38 | #endif | |
39 | ||
54b6a1bd HY |
40 | struct async_aes_ctx { |
41 | struct cryptd_ablkcipher *cryptd_tfm; | |
42 | }; | |
43 | ||
44 | #define AESNI_ALIGN 16 | |
45 | #define AES_BLOCK_MASK (~(AES_BLOCK_SIZE-1)) | |
46 | ||
47 | asmlinkage int aesni_set_key(struct crypto_aes_ctx *ctx, const u8 *in_key, | |
48 | unsigned int key_len); | |
49 | asmlinkage void aesni_enc(struct crypto_aes_ctx *ctx, u8 *out, | |
50 | const u8 *in); | |
51 | asmlinkage void aesni_dec(struct crypto_aes_ctx *ctx, u8 *out, | |
52 | const u8 *in); | |
53 | asmlinkage void aesni_ecb_enc(struct crypto_aes_ctx *ctx, u8 *out, | |
54 | const u8 *in, unsigned int len); | |
55 | asmlinkage void aesni_ecb_dec(struct crypto_aes_ctx *ctx, u8 *out, | |
56 | const u8 *in, unsigned int len); | |
57 | asmlinkage void aesni_cbc_enc(struct crypto_aes_ctx *ctx, u8 *out, | |
58 | const u8 *in, unsigned int len, u8 *iv); | |
59 | asmlinkage void aesni_cbc_dec(struct crypto_aes_ctx *ctx, u8 *out, | |
60 | const u8 *in, unsigned int len, u8 *iv); | |
61 | ||
62 | static inline int kernel_fpu_using(void) | |
63 | { | |
64 | if (in_interrupt() && !(read_cr0() & X86_CR0_TS)) | |
65 | return 1; | |
66 | return 0; | |
67 | } | |
68 | ||
69 | static inline struct crypto_aes_ctx *aes_ctx(void *raw_ctx) | |
70 | { | |
71 | unsigned long addr = (unsigned long)raw_ctx; | |
72 | unsigned long align = AESNI_ALIGN; | |
73 | ||
74 | if (align <= crypto_tfm_ctx_alignment()) | |
75 | align = 1; | |
76 | return (struct crypto_aes_ctx *)ALIGN(addr, align); | |
77 | } | |
78 | ||
79 | static int aes_set_key_common(struct crypto_tfm *tfm, void *raw_ctx, | |
80 | const u8 *in_key, unsigned int key_len) | |
81 | { | |
82 | struct crypto_aes_ctx *ctx = aes_ctx(raw_ctx); | |
83 | u32 *flags = &tfm->crt_flags; | |
84 | int err; | |
85 | ||
86 | if (key_len != AES_KEYSIZE_128 && key_len != AES_KEYSIZE_192 && | |
87 | key_len != AES_KEYSIZE_256) { | |
88 | *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; | |
89 | return -EINVAL; | |
90 | } | |
91 | ||
92 | if (kernel_fpu_using()) | |
93 | err = crypto_aes_expand_key(ctx, in_key, key_len); | |
94 | else { | |
95 | kernel_fpu_begin(); | |
96 | err = aesni_set_key(ctx, in_key, key_len); | |
97 | kernel_fpu_end(); | |
98 | } | |
99 | ||
100 | return err; | |
101 | } | |
102 | ||
103 | static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key, | |
104 | unsigned int key_len) | |
105 | { | |
106 | return aes_set_key_common(tfm, crypto_tfm_ctx(tfm), in_key, key_len); | |
107 | } | |
108 | ||
109 | static void aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) | |
110 | { | |
111 | struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm)); | |
112 | ||
113 | if (kernel_fpu_using()) | |
114 | crypto_aes_encrypt_x86(ctx, dst, src); | |
115 | else { | |
116 | kernel_fpu_begin(); | |
117 | aesni_enc(ctx, dst, src); | |
118 | kernel_fpu_end(); | |
119 | } | |
120 | } | |
121 | ||
122 | static void aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) | |
123 | { | |
124 | struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm)); | |
125 | ||
126 | if (kernel_fpu_using()) | |
127 | crypto_aes_decrypt_x86(ctx, dst, src); | |
128 | else { | |
129 | kernel_fpu_begin(); | |
130 | aesni_dec(ctx, dst, src); | |
131 | kernel_fpu_end(); | |
132 | } | |
133 | } | |
134 | ||
135 | static struct crypto_alg aesni_alg = { | |
136 | .cra_name = "aes", | |
137 | .cra_driver_name = "aes-aesni", | |
138 | .cra_priority = 300, | |
139 | .cra_flags = CRYPTO_ALG_TYPE_CIPHER, | |
140 | .cra_blocksize = AES_BLOCK_SIZE, | |
141 | .cra_ctxsize = sizeof(struct crypto_aes_ctx)+AESNI_ALIGN-1, | |
142 | .cra_alignmask = 0, | |
143 | .cra_module = THIS_MODULE, | |
144 | .cra_list = LIST_HEAD_INIT(aesni_alg.cra_list), | |
145 | .cra_u = { | |
146 | .cipher = { | |
147 | .cia_min_keysize = AES_MIN_KEY_SIZE, | |
148 | .cia_max_keysize = AES_MAX_KEY_SIZE, | |
149 | .cia_setkey = aes_set_key, | |
150 | .cia_encrypt = aes_encrypt, | |
151 | .cia_decrypt = aes_decrypt | |
152 | } | |
153 | } | |
154 | }; | |
155 | ||
2cf4ac8b HY |
156 | static void __aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) |
157 | { | |
158 | struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm)); | |
159 | ||
160 | aesni_enc(ctx, dst, src); | |
161 | } | |
162 | ||
163 | static void __aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) | |
164 | { | |
165 | struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm)); | |
166 | ||
167 | aesni_dec(ctx, dst, src); | |
168 | } | |
169 | ||
170 | static struct crypto_alg __aesni_alg = { | |
171 | .cra_name = "__aes-aesni", | |
172 | .cra_driver_name = "__driver-aes-aesni", | |
173 | .cra_priority = 0, | |
174 | .cra_flags = CRYPTO_ALG_TYPE_CIPHER, | |
175 | .cra_blocksize = AES_BLOCK_SIZE, | |
176 | .cra_ctxsize = sizeof(struct crypto_aes_ctx)+AESNI_ALIGN-1, | |
177 | .cra_alignmask = 0, | |
178 | .cra_module = THIS_MODULE, | |
179 | .cra_list = LIST_HEAD_INIT(__aesni_alg.cra_list), | |
180 | .cra_u = { | |
181 | .cipher = { | |
182 | .cia_min_keysize = AES_MIN_KEY_SIZE, | |
183 | .cia_max_keysize = AES_MAX_KEY_SIZE, | |
184 | .cia_setkey = aes_set_key, | |
185 | .cia_encrypt = __aes_encrypt, | |
186 | .cia_decrypt = __aes_decrypt | |
187 | } | |
188 | } | |
189 | }; | |
190 | ||
54b6a1bd HY |
191 | static int ecb_encrypt(struct blkcipher_desc *desc, |
192 | struct scatterlist *dst, struct scatterlist *src, | |
193 | unsigned int nbytes) | |
194 | { | |
195 | struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm)); | |
196 | struct blkcipher_walk walk; | |
197 | int err; | |
198 | ||
199 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
200 | err = blkcipher_walk_virt(desc, &walk); | |
201 | ||
202 | kernel_fpu_begin(); | |
203 | while ((nbytes = walk.nbytes)) { | |
204 | aesni_ecb_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr, | |
205 | nbytes & AES_BLOCK_MASK); | |
206 | nbytes &= AES_BLOCK_SIZE - 1; | |
207 | err = blkcipher_walk_done(desc, &walk, nbytes); | |
208 | } | |
209 | kernel_fpu_end(); | |
210 | ||
211 | return err; | |
212 | } | |
213 | ||
214 | static int ecb_decrypt(struct blkcipher_desc *desc, | |
215 | struct scatterlist *dst, struct scatterlist *src, | |
216 | unsigned int nbytes) | |
217 | { | |
218 | struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm)); | |
219 | struct blkcipher_walk walk; | |
220 | int err; | |
221 | ||
222 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
223 | err = blkcipher_walk_virt(desc, &walk); | |
224 | ||
225 | kernel_fpu_begin(); | |
226 | while ((nbytes = walk.nbytes)) { | |
227 | aesni_ecb_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr, | |
228 | nbytes & AES_BLOCK_MASK); | |
229 | nbytes &= AES_BLOCK_SIZE - 1; | |
230 | err = blkcipher_walk_done(desc, &walk, nbytes); | |
231 | } | |
232 | kernel_fpu_end(); | |
233 | ||
234 | return err; | |
235 | } | |
236 | ||
237 | static struct crypto_alg blk_ecb_alg = { | |
238 | .cra_name = "__ecb-aes-aesni", | |
239 | .cra_driver_name = "__driver-ecb-aes-aesni", | |
240 | .cra_priority = 0, | |
241 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, | |
242 | .cra_blocksize = AES_BLOCK_SIZE, | |
243 | .cra_ctxsize = sizeof(struct crypto_aes_ctx)+AESNI_ALIGN-1, | |
244 | .cra_alignmask = 0, | |
245 | .cra_type = &crypto_blkcipher_type, | |
246 | .cra_module = THIS_MODULE, | |
247 | .cra_list = LIST_HEAD_INIT(blk_ecb_alg.cra_list), | |
248 | .cra_u = { | |
249 | .blkcipher = { | |
250 | .min_keysize = AES_MIN_KEY_SIZE, | |
251 | .max_keysize = AES_MAX_KEY_SIZE, | |
252 | .setkey = aes_set_key, | |
253 | .encrypt = ecb_encrypt, | |
254 | .decrypt = ecb_decrypt, | |
255 | }, | |
256 | }, | |
257 | }; | |
258 | ||
259 | static int cbc_encrypt(struct blkcipher_desc *desc, | |
260 | struct scatterlist *dst, struct scatterlist *src, | |
261 | unsigned int nbytes) | |
262 | { | |
263 | struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm)); | |
264 | struct blkcipher_walk walk; | |
265 | int err; | |
266 | ||
267 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
268 | err = blkcipher_walk_virt(desc, &walk); | |
269 | ||
270 | kernel_fpu_begin(); | |
271 | while ((nbytes = walk.nbytes)) { | |
272 | aesni_cbc_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr, | |
273 | nbytes & AES_BLOCK_MASK, walk.iv); | |
274 | nbytes &= AES_BLOCK_SIZE - 1; | |
275 | err = blkcipher_walk_done(desc, &walk, nbytes); | |
276 | } | |
277 | kernel_fpu_end(); | |
278 | ||
279 | return err; | |
280 | } | |
281 | ||
282 | static int cbc_decrypt(struct blkcipher_desc *desc, | |
283 | struct scatterlist *dst, struct scatterlist *src, | |
284 | unsigned int nbytes) | |
285 | { | |
286 | struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm)); | |
287 | struct blkcipher_walk walk; | |
288 | int err; | |
289 | ||
290 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
291 | err = blkcipher_walk_virt(desc, &walk); | |
292 | ||
293 | kernel_fpu_begin(); | |
294 | while ((nbytes = walk.nbytes)) { | |
295 | aesni_cbc_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr, | |
296 | nbytes & AES_BLOCK_MASK, walk.iv); | |
297 | nbytes &= AES_BLOCK_SIZE - 1; | |
298 | err = blkcipher_walk_done(desc, &walk, nbytes); | |
299 | } | |
300 | kernel_fpu_end(); | |
301 | ||
302 | return err; | |
303 | } | |
304 | ||
305 | static struct crypto_alg blk_cbc_alg = { | |
306 | .cra_name = "__cbc-aes-aesni", | |
307 | .cra_driver_name = "__driver-cbc-aes-aesni", | |
308 | .cra_priority = 0, | |
309 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, | |
310 | .cra_blocksize = AES_BLOCK_SIZE, | |
311 | .cra_ctxsize = sizeof(struct crypto_aes_ctx)+AESNI_ALIGN-1, | |
312 | .cra_alignmask = 0, | |
313 | .cra_type = &crypto_blkcipher_type, | |
314 | .cra_module = THIS_MODULE, | |
315 | .cra_list = LIST_HEAD_INIT(blk_cbc_alg.cra_list), | |
316 | .cra_u = { | |
317 | .blkcipher = { | |
318 | .min_keysize = AES_MIN_KEY_SIZE, | |
319 | .max_keysize = AES_MAX_KEY_SIZE, | |
320 | .setkey = aes_set_key, | |
321 | .encrypt = cbc_encrypt, | |
322 | .decrypt = cbc_decrypt, | |
323 | }, | |
324 | }, | |
325 | }; | |
326 | ||
327 | static int ablk_set_key(struct crypto_ablkcipher *tfm, const u8 *key, | |
328 | unsigned int key_len) | |
329 | { | |
330 | struct async_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm); | |
2cf4ac8b HY |
331 | struct crypto_ablkcipher *child = &ctx->cryptd_tfm->base; |
332 | int err; | |
54b6a1bd | 333 | |
2cf4ac8b HY |
334 | crypto_ablkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK); |
335 | crypto_ablkcipher_set_flags(child, crypto_ablkcipher_get_flags(tfm) | |
336 | & CRYPTO_TFM_REQ_MASK); | |
337 | err = crypto_ablkcipher_setkey(child, key, key_len); | |
338 | crypto_ablkcipher_set_flags(tfm, crypto_ablkcipher_get_flags(child) | |
339 | & CRYPTO_TFM_RES_MASK); | |
340 | return err; | |
54b6a1bd HY |
341 | } |
342 | ||
343 | static int ablk_encrypt(struct ablkcipher_request *req) | |
344 | { | |
345 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); | |
346 | struct async_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm); | |
347 | ||
348 | if (kernel_fpu_using()) { | |
349 | struct ablkcipher_request *cryptd_req = | |
350 | ablkcipher_request_ctx(req); | |
351 | memcpy(cryptd_req, req, sizeof(*req)); | |
352 | ablkcipher_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base); | |
353 | return crypto_ablkcipher_encrypt(cryptd_req); | |
354 | } else { | |
355 | struct blkcipher_desc desc; | |
356 | desc.tfm = cryptd_ablkcipher_child(ctx->cryptd_tfm); | |
357 | desc.info = req->info; | |
358 | desc.flags = 0; | |
359 | return crypto_blkcipher_crt(desc.tfm)->encrypt( | |
360 | &desc, req->dst, req->src, req->nbytes); | |
361 | } | |
362 | } | |
363 | ||
364 | static int ablk_decrypt(struct ablkcipher_request *req) | |
365 | { | |
366 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); | |
367 | struct async_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm); | |
368 | ||
369 | if (kernel_fpu_using()) { | |
370 | struct ablkcipher_request *cryptd_req = | |
371 | ablkcipher_request_ctx(req); | |
372 | memcpy(cryptd_req, req, sizeof(*req)); | |
373 | ablkcipher_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base); | |
374 | return crypto_ablkcipher_decrypt(cryptd_req); | |
375 | } else { | |
376 | struct blkcipher_desc desc; | |
377 | desc.tfm = cryptd_ablkcipher_child(ctx->cryptd_tfm); | |
378 | desc.info = req->info; | |
379 | desc.flags = 0; | |
380 | return crypto_blkcipher_crt(desc.tfm)->decrypt( | |
381 | &desc, req->dst, req->src, req->nbytes); | |
382 | } | |
383 | } | |
384 | ||
385 | static void ablk_exit(struct crypto_tfm *tfm) | |
386 | { | |
387 | struct async_aes_ctx *ctx = crypto_tfm_ctx(tfm); | |
388 | ||
389 | cryptd_free_ablkcipher(ctx->cryptd_tfm); | |
390 | } | |
391 | ||
392 | static void ablk_init_common(struct crypto_tfm *tfm, | |
393 | struct cryptd_ablkcipher *cryptd_tfm) | |
394 | { | |
395 | struct async_aes_ctx *ctx = crypto_tfm_ctx(tfm); | |
396 | ||
397 | ctx->cryptd_tfm = cryptd_tfm; | |
398 | tfm->crt_ablkcipher.reqsize = sizeof(struct ablkcipher_request) + | |
399 | crypto_ablkcipher_reqsize(&cryptd_tfm->base); | |
400 | } | |
401 | ||
402 | static int ablk_ecb_init(struct crypto_tfm *tfm) | |
403 | { | |
404 | struct cryptd_ablkcipher *cryptd_tfm; | |
405 | ||
406 | cryptd_tfm = cryptd_alloc_ablkcipher("__driver-ecb-aes-aesni", 0, 0); | |
407 | if (IS_ERR(cryptd_tfm)) | |
408 | return PTR_ERR(cryptd_tfm); | |
409 | ablk_init_common(tfm, cryptd_tfm); | |
410 | return 0; | |
411 | } | |
412 | ||
413 | static struct crypto_alg ablk_ecb_alg = { | |
414 | .cra_name = "ecb(aes)", | |
415 | .cra_driver_name = "ecb-aes-aesni", | |
416 | .cra_priority = 400, | |
417 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC, | |
418 | .cra_blocksize = AES_BLOCK_SIZE, | |
419 | .cra_ctxsize = sizeof(struct async_aes_ctx), | |
420 | .cra_alignmask = 0, | |
421 | .cra_type = &crypto_ablkcipher_type, | |
422 | .cra_module = THIS_MODULE, | |
423 | .cra_list = LIST_HEAD_INIT(ablk_ecb_alg.cra_list), | |
424 | .cra_init = ablk_ecb_init, | |
425 | .cra_exit = ablk_exit, | |
426 | .cra_u = { | |
427 | .ablkcipher = { | |
428 | .min_keysize = AES_MIN_KEY_SIZE, | |
429 | .max_keysize = AES_MAX_KEY_SIZE, | |
430 | .setkey = ablk_set_key, | |
431 | .encrypt = ablk_encrypt, | |
432 | .decrypt = ablk_decrypt, | |
433 | }, | |
434 | }, | |
435 | }; | |
436 | ||
437 | static int ablk_cbc_init(struct crypto_tfm *tfm) | |
438 | { | |
439 | struct cryptd_ablkcipher *cryptd_tfm; | |
440 | ||
441 | cryptd_tfm = cryptd_alloc_ablkcipher("__driver-cbc-aes-aesni", 0, 0); | |
442 | if (IS_ERR(cryptd_tfm)) | |
443 | return PTR_ERR(cryptd_tfm); | |
444 | ablk_init_common(tfm, cryptd_tfm); | |
445 | return 0; | |
446 | } | |
447 | ||
448 | static struct crypto_alg ablk_cbc_alg = { | |
449 | .cra_name = "cbc(aes)", | |
450 | .cra_driver_name = "cbc-aes-aesni", | |
451 | .cra_priority = 400, | |
452 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC, | |
453 | .cra_blocksize = AES_BLOCK_SIZE, | |
454 | .cra_ctxsize = sizeof(struct async_aes_ctx), | |
455 | .cra_alignmask = 0, | |
456 | .cra_type = &crypto_ablkcipher_type, | |
457 | .cra_module = THIS_MODULE, | |
458 | .cra_list = LIST_HEAD_INIT(ablk_cbc_alg.cra_list), | |
459 | .cra_init = ablk_cbc_init, | |
460 | .cra_exit = ablk_exit, | |
461 | .cra_u = { | |
462 | .ablkcipher = { | |
463 | .min_keysize = AES_MIN_KEY_SIZE, | |
464 | .max_keysize = AES_MAX_KEY_SIZE, | |
465 | .ivsize = AES_BLOCK_SIZE, | |
466 | .setkey = ablk_set_key, | |
467 | .encrypt = ablk_encrypt, | |
468 | .decrypt = ablk_decrypt, | |
469 | }, | |
470 | }, | |
471 | }; | |
472 | ||
2cf4ac8b HY |
473 | #ifdef HAS_CTR |
474 | static int ablk_ctr_init(struct crypto_tfm *tfm) | |
475 | { | |
476 | struct cryptd_ablkcipher *cryptd_tfm; | |
477 | ||
478 | cryptd_tfm = cryptd_alloc_ablkcipher("fpu(ctr(__driver-aes-aesni))", | |
479 | 0, 0); | |
480 | if (IS_ERR(cryptd_tfm)) | |
481 | return PTR_ERR(cryptd_tfm); | |
482 | ablk_init_common(tfm, cryptd_tfm); | |
483 | return 0; | |
484 | } | |
485 | ||
486 | static struct crypto_alg ablk_ctr_alg = { | |
487 | .cra_name = "ctr(aes)", | |
488 | .cra_driver_name = "ctr-aes-aesni", | |
489 | .cra_priority = 400, | |
490 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC, | |
491 | .cra_blocksize = 1, | |
492 | .cra_ctxsize = sizeof(struct async_aes_ctx), | |
493 | .cra_alignmask = 0, | |
494 | .cra_type = &crypto_ablkcipher_type, | |
495 | .cra_module = THIS_MODULE, | |
496 | .cra_list = LIST_HEAD_INIT(ablk_ctr_alg.cra_list), | |
497 | .cra_init = ablk_ctr_init, | |
498 | .cra_exit = ablk_exit, | |
499 | .cra_u = { | |
500 | .ablkcipher = { | |
501 | .min_keysize = AES_MIN_KEY_SIZE, | |
502 | .max_keysize = AES_MAX_KEY_SIZE, | |
503 | .ivsize = AES_BLOCK_SIZE, | |
504 | .setkey = ablk_set_key, | |
505 | .encrypt = ablk_encrypt, | |
506 | .decrypt = ablk_decrypt, | |
507 | .geniv = "chainiv", | |
508 | }, | |
509 | }, | |
510 | }; | |
511 | #endif | |
512 | ||
513 | #ifdef HAS_LRW | |
514 | static int ablk_lrw_init(struct crypto_tfm *tfm) | |
515 | { | |
516 | struct cryptd_ablkcipher *cryptd_tfm; | |
517 | ||
518 | cryptd_tfm = cryptd_alloc_ablkcipher("fpu(lrw(__driver-aes-aesni))", | |
519 | 0, 0); | |
520 | if (IS_ERR(cryptd_tfm)) | |
521 | return PTR_ERR(cryptd_tfm); | |
522 | ablk_init_common(tfm, cryptd_tfm); | |
523 | return 0; | |
524 | } | |
525 | ||
526 | static struct crypto_alg ablk_lrw_alg = { | |
527 | .cra_name = "lrw(aes)", | |
528 | .cra_driver_name = "lrw-aes-aesni", | |
529 | .cra_priority = 400, | |
530 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC, | |
531 | .cra_blocksize = AES_BLOCK_SIZE, | |
532 | .cra_ctxsize = sizeof(struct async_aes_ctx), | |
533 | .cra_alignmask = 0, | |
534 | .cra_type = &crypto_ablkcipher_type, | |
535 | .cra_module = THIS_MODULE, | |
536 | .cra_list = LIST_HEAD_INIT(ablk_lrw_alg.cra_list), | |
537 | .cra_init = ablk_lrw_init, | |
538 | .cra_exit = ablk_exit, | |
539 | .cra_u = { | |
540 | .ablkcipher = { | |
541 | .min_keysize = AES_MIN_KEY_SIZE + AES_BLOCK_SIZE, | |
542 | .max_keysize = AES_MAX_KEY_SIZE + AES_BLOCK_SIZE, | |
543 | .ivsize = AES_BLOCK_SIZE, | |
544 | .setkey = ablk_set_key, | |
545 | .encrypt = ablk_encrypt, | |
546 | .decrypt = ablk_decrypt, | |
547 | }, | |
548 | }, | |
549 | }; | |
550 | #endif | |
551 | ||
552 | #ifdef HAS_PCBC | |
553 | static int ablk_pcbc_init(struct crypto_tfm *tfm) | |
554 | { | |
555 | struct cryptd_ablkcipher *cryptd_tfm; | |
556 | ||
557 | cryptd_tfm = cryptd_alloc_ablkcipher("fpu(pcbc(__driver-aes-aesni))", | |
558 | 0, 0); | |
559 | if (IS_ERR(cryptd_tfm)) | |
560 | return PTR_ERR(cryptd_tfm); | |
561 | ablk_init_common(tfm, cryptd_tfm); | |
562 | return 0; | |
563 | } | |
564 | ||
565 | static struct crypto_alg ablk_pcbc_alg = { | |
566 | .cra_name = "pcbc(aes)", | |
567 | .cra_driver_name = "pcbc-aes-aesni", | |
568 | .cra_priority = 400, | |
569 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC, | |
570 | .cra_blocksize = AES_BLOCK_SIZE, | |
571 | .cra_ctxsize = sizeof(struct async_aes_ctx), | |
572 | .cra_alignmask = 0, | |
573 | .cra_type = &crypto_ablkcipher_type, | |
574 | .cra_module = THIS_MODULE, | |
575 | .cra_list = LIST_HEAD_INIT(ablk_pcbc_alg.cra_list), | |
576 | .cra_init = ablk_pcbc_init, | |
577 | .cra_exit = ablk_exit, | |
578 | .cra_u = { | |
579 | .ablkcipher = { | |
580 | .min_keysize = AES_MIN_KEY_SIZE, | |
581 | .max_keysize = AES_MAX_KEY_SIZE, | |
582 | .ivsize = AES_BLOCK_SIZE, | |
583 | .setkey = ablk_set_key, | |
584 | .encrypt = ablk_encrypt, | |
585 | .decrypt = ablk_decrypt, | |
586 | }, | |
587 | }, | |
588 | }; | |
589 | #endif | |
590 | ||
591 | #ifdef HAS_XTS | |
592 | static int ablk_xts_init(struct crypto_tfm *tfm) | |
593 | { | |
594 | struct cryptd_ablkcipher *cryptd_tfm; | |
595 | ||
596 | cryptd_tfm = cryptd_alloc_ablkcipher("fpu(xts(__driver-aes-aesni))", | |
597 | 0, 0); | |
598 | if (IS_ERR(cryptd_tfm)) | |
599 | return PTR_ERR(cryptd_tfm); | |
600 | ablk_init_common(tfm, cryptd_tfm); | |
601 | return 0; | |
602 | } | |
603 | ||
604 | static struct crypto_alg ablk_xts_alg = { | |
605 | .cra_name = "xts(aes)", | |
606 | .cra_driver_name = "xts-aes-aesni", | |
607 | .cra_priority = 400, | |
608 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC, | |
609 | .cra_blocksize = AES_BLOCK_SIZE, | |
610 | .cra_ctxsize = sizeof(struct async_aes_ctx), | |
611 | .cra_alignmask = 0, | |
612 | .cra_type = &crypto_ablkcipher_type, | |
613 | .cra_module = THIS_MODULE, | |
614 | .cra_list = LIST_HEAD_INIT(ablk_xts_alg.cra_list), | |
615 | .cra_init = ablk_xts_init, | |
616 | .cra_exit = ablk_exit, | |
617 | .cra_u = { | |
618 | .ablkcipher = { | |
619 | .min_keysize = 2 * AES_MIN_KEY_SIZE, | |
620 | .max_keysize = 2 * AES_MAX_KEY_SIZE, | |
621 | .ivsize = AES_BLOCK_SIZE, | |
622 | .setkey = ablk_set_key, | |
623 | .encrypt = ablk_encrypt, | |
624 | .decrypt = ablk_decrypt, | |
625 | }, | |
626 | }, | |
627 | }; | |
628 | #endif | |
629 | ||
54b6a1bd HY |
630 | static int __init aesni_init(void) |
631 | { | |
632 | int err; | |
633 | ||
634 | if (!cpu_has_aes) { | |
635 | printk(KERN_ERR "Intel AES-NI instructions are not detected.\n"); | |
636 | return -ENODEV; | |
637 | } | |
638 | if ((err = crypto_register_alg(&aesni_alg))) | |
639 | goto aes_err; | |
2cf4ac8b HY |
640 | if ((err = crypto_register_alg(&__aesni_alg))) |
641 | goto __aes_err; | |
54b6a1bd HY |
642 | if ((err = crypto_register_alg(&blk_ecb_alg))) |
643 | goto blk_ecb_err; | |
644 | if ((err = crypto_register_alg(&blk_cbc_alg))) | |
645 | goto blk_cbc_err; | |
646 | if ((err = crypto_register_alg(&ablk_ecb_alg))) | |
647 | goto ablk_ecb_err; | |
648 | if ((err = crypto_register_alg(&ablk_cbc_alg))) | |
649 | goto ablk_cbc_err; | |
2cf4ac8b HY |
650 | #ifdef HAS_CTR |
651 | if ((err = crypto_register_alg(&ablk_ctr_alg))) | |
652 | goto ablk_ctr_err; | |
653 | #endif | |
654 | #ifdef HAS_LRW | |
655 | if ((err = crypto_register_alg(&ablk_lrw_alg))) | |
656 | goto ablk_lrw_err; | |
657 | #endif | |
658 | #ifdef HAS_PCBC | |
659 | if ((err = crypto_register_alg(&ablk_pcbc_alg))) | |
660 | goto ablk_pcbc_err; | |
661 | #endif | |
662 | #ifdef HAS_XTS | |
663 | if ((err = crypto_register_alg(&ablk_xts_alg))) | |
664 | goto ablk_xts_err; | |
665 | #endif | |
54b6a1bd HY |
666 | |
667 | return err; | |
668 | ||
2cf4ac8b HY |
669 | #ifdef HAS_XTS |
670 | ablk_xts_err: | |
671 | #endif | |
672 | #ifdef HAS_PCBC | |
673 | crypto_unregister_alg(&ablk_pcbc_alg); | |
674 | ablk_pcbc_err: | |
675 | #endif | |
676 | #ifdef HAS_LRW | |
677 | crypto_unregister_alg(&ablk_lrw_alg); | |
678 | ablk_lrw_err: | |
679 | #endif | |
680 | #ifdef HAS_CTR | |
681 | crypto_unregister_alg(&ablk_ctr_alg); | |
682 | ablk_ctr_err: | |
683 | #endif | |
684 | crypto_unregister_alg(&ablk_cbc_alg); | |
54b6a1bd HY |
685 | ablk_cbc_err: |
686 | crypto_unregister_alg(&ablk_ecb_alg); | |
687 | ablk_ecb_err: | |
688 | crypto_unregister_alg(&blk_cbc_alg); | |
689 | blk_cbc_err: | |
690 | crypto_unregister_alg(&blk_ecb_alg); | |
691 | blk_ecb_err: | |
2cf4ac8b HY |
692 | crypto_unregister_alg(&__aesni_alg); |
693 | __aes_err: | |
54b6a1bd HY |
694 | crypto_unregister_alg(&aesni_alg); |
695 | aes_err: | |
696 | return err; | |
697 | } | |
698 | ||
699 | static void __exit aesni_exit(void) | |
700 | { | |
2cf4ac8b HY |
701 | #ifdef HAS_XTS |
702 | crypto_unregister_alg(&ablk_xts_alg); | |
703 | #endif | |
704 | #ifdef HAS_PCBC | |
705 | crypto_unregister_alg(&ablk_pcbc_alg); | |
706 | #endif | |
707 | #ifdef HAS_LRW | |
708 | crypto_unregister_alg(&ablk_lrw_alg); | |
709 | #endif | |
710 | #ifdef HAS_CTR | |
711 | crypto_unregister_alg(&ablk_ctr_alg); | |
712 | #endif | |
54b6a1bd HY |
713 | crypto_unregister_alg(&ablk_cbc_alg); |
714 | crypto_unregister_alg(&ablk_ecb_alg); | |
715 | crypto_unregister_alg(&blk_cbc_alg); | |
716 | crypto_unregister_alg(&blk_ecb_alg); | |
2cf4ac8b | 717 | crypto_unregister_alg(&__aesni_alg); |
54b6a1bd HY |
718 | crypto_unregister_alg(&aesni_alg); |
719 | } | |
720 | ||
721 | module_init(aesni_init); | |
722 | module_exit(aesni_exit); | |
723 | ||
724 | MODULE_DESCRIPTION("Rijndael (AES) Cipher Algorithm, Intel AES-NI instructions optimized"); | |
725 | MODULE_LICENSE("GPL"); | |
726 | MODULE_ALIAS("aes"); |