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49788fe2 AB |
1 | /* |
2 | * linux/arch/arm64/crypto/aes-glue.c - wrapper code for ARMv8 AES | |
3 | * | |
4 | * Copyright (C) 2013 Linaro Ltd <ard.biesheuvel@linaro.org> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
11 | #include <asm/neon.h> | |
12 | #include <asm/hwcap.h> | |
13 | #include <crypto/aes.h> | |
14 | #include <crypto/ablk_helper.h> | |
15 | #include <crypto/algapi.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/cpufeature.h> | |
18 | ||
12ac3efe AB |
19 | #include "aes-ce-setkey.h" |
20 | ||
49788fe2 AB |
21 | #ifdef USE_V8_CRYPTO_EXTENSIONS |
22 | #define MODE "ce" | |
23 | #define PRIO 300 | |
12ac3efe AB |
24 | #define aes_setkey ce_aes_setkey |
25 | #define aes_expandkey ce_aes_expandkey | |
49788fe2 AB |
26 | #define aes_ecb_encrypt ce_aes_ecb_encrypt |
27 | #define aes_ecb_decrypt ce_aes_ecb_decrypt | |
28 | #define aes_cbc_encrypt ce_aes_cbc_encrypt | |
29 | #define aes_cbc_decrypt ce_aes_cbc_decrypt | |
30 | #define aes_ctr_encrypt ce_aes_ctr_encrypt | |
31 | #define aes_xts_encrypt ce_aes_xts_encrypt | |
32 | #define aes_xts_decrypt ce_aes_xts_decrypt | |
33 | MODULE_DESCRIPTION("AES-ECB/CBC/CTR/XTS using ARMv8 Crypto Extensions"); | |
34 | #else | |
35 | #define MODE "neon" | |
36 | #define PRIO 200 | |
12ac3efe AB |
37 | #define aes_setkey crypto_aes_set_key |
38 | #define aes_expandkey crypto_aes_expand_key | |
49788fe2 AB |
39 | #define aes_ecb_encrypt neon_aes_ecb_encrypt |
40 | #define aes_ecb_decrypt neon_aes_ecb_decrypt | |
41 | #define aes_cbc_encrypt neon_aes_cbc_encrypt | |
42 | #define aes_cbc_decrypt neon_aes_cbc_decrypt | |
43 | #define aes_ctr_encrypt neon_aes_ctr_encrypt | |
44 | #define aes_xts_encrypt neon_aes_xts_encrypt | |
45 | #define aes_xts_decrypt neon_aes_xts_decrypt | |
46 | MODULE_DESCRIPTION("AES-ECB/CBC/CTR/XTS using ARMv8 NEON"); | |
5d26a105 KC |
47 | MODULE_ALIAS_CRYPTO("ecb(aes)"); |
48 | MODULE_ALIAS_CRYPTO("cbc(aes)"); | |
49 | MODULE_ALIAS_CRYPTO("ctr(aes)"); | |
50 | MODULE_ALIAS_CRYPTO("xts(aes)"); | |
49788fe2 AB |
51 | #endif |
52 | ||
53 | MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>"); | |
54 | MODULE_LICENSE("GPL v2"); | |
55 | ||
56 | /* defined in aes-modes.S */ | |
57 | asmlinkage void aes_ecb_encrypt(u8 out[], u8 const in[], u8 const rk[], | |
58 | int rounds, int blocks, int first); | |
59 | asmlinkage void aes_ecb_decrypt(u8 out[], u8 const in[], u8 const rk[], | |
60 | int rounds, int blocks, int first); | |
61 | ||
62 | asmlinkage void aes_cbc_encrypt(u8 out[], u8 const in[], u8 const rk[], | |
63 | int rounds, int blocks, u8 iv[], int first); | |
64 | asmlinkage void aes_cbc_decrypt(u8 out[], u8 const in[], u8 const rk[], | |
65 | int rounds, int blocks, u8 iv[], int first); | |
66 | ||
67 | asmlinkage void aes_ctr_encrypt(u8 out[], u8 const in[], u8 const rk[], | |
68 | int rounds, int blocks, u8 ctr[], int first); | |
69 | ||
70 | asmlinkage void aes_xts_encrypt(u8 out[], u8 const in[], u8 const rk1[], | |
71 | int rounds, int blocks, u8 const rk2[], u8 iv[], | |
72 | int first); | |
73 | asmlinkage void aes_xts_decrypt(u8 out[], u8 const in[], u8 const rk1[], | |
74 | int rounds, int blocks, u8 const rk2[], u8 iv[], | |
75 | int first); | |
76 | ||
77 | struct crypto_aes_xts_ctx { | |
78 | struct crypto_aes_ctx key1; | |
79 | struct crypto_aes_ctx __aligned(8) key2; | |
80 | }; | |
81 | ||
82 | static int xts_set_key(struct crypto_tfm *tfm, const u8 *in_key, | |
83 | unsigned int key_len) | |
84 | { | |
85 | struct crypto_aes_xts_ctx *ctx = crypto_tfm_ctx(tfm); | |
86 | int ret; | |
87 | ||
12ac3efe | 88 | ret = aes_expandkey(&ctx->key1, in_key, key_len / 2); |
49788fe2 | 89 | if (!ret) |
12ac3efe AB |
90 | ret = aes_expandkey(&ctx->key2, &in_key[key_len / 2], |
91 | key_len / 2); | |
49788fe2 AB |
92 | if (!ret) |
93 | return 0; | |
94 | ||
95 | tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; | |
96 | return -EINVAL; | |
97 | } | |
98 | ||
99 | static int ecb_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, | |
100 | struct scatterlist *src, unsigned int nbytes) | |
101 | { | |
102 | struct crypto_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
103 | int err, first, rounds = 6 + ctx->key_length / 4; | |
104 | struct blkcipher_walk walk; | |
105 | unsigned int blocks; | |
106 | ||
107 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; | |
108 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
109 | err = blkcipher_walk_virt(desc, &walk); | |
110 | ||
111 | kernel_neon_begin(); | |
112 | for (first = 1; (blocks = (walk.nbytes / AES_BLOCK_SIZE)); first = 0) { | |
113 | aes_ecb_encrypt(walk.dst.virt.addr, walk.src.virt.addr, | |
114 | (u8 *)ctx->key_enc, rounds, blocks, first); | |
f960d209 | 115 | err = blkcipher_walk_done(desc, &walk, walk.nbytes % AES_BLOCK_SIZE); |
49788fe2 AB |
116 | } |
117 | kernel_neon_end(); | |
118 | return err; | |
119 | } | |
120 | ||
121 | static int ecb_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, | |
122 | struct scatterlist *src, unsigned int nbytes) | |
123 | { | |
124 | struct crypto_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
125 | int err, first, rounds = 6 + ctx->key_length / 4; | |
126 | struct blkcipher_walk walk; | |
127 | unsigned int blocks; | |
128 | ||
129 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; | |
130 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
131 | err = blkcipher_walk_virt(desc, &walk); | |
132 | ||
133 | kernel_neon_begin(); | |
134 | for (first = 1; (blocks = (walk.nbytes / AES_BLOCK_SIZE)); first = 0) { | |
135 | aes_ecb_decrypt(walk.dst.virt.addr, walk.src.virt.addr, | |
136 | (u8 *)ctx->key_dec, rounds, blocks, first); | |
f960d209 | 137 | err = blkcipher_walk_done(desc, &walk, walk.nbytes % AES_BLOCK_SIZE); |
49788fe2 AB |
138 | } |
139 | kernel_neon_end(); | |
140 | return err; | |
141 | } | |
142 | ||
143 | static int cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, | |
144 | struct scatterlist *src, unsigned int nbytes) | |
145 | { | |
146 | struct crypto_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
147 | int err, first, rounds = 6 + ctx->key_length / 4; | |
148 | struct blkcipher_walk walk; | |
149 | unsigned int blocks; | |
150 | ||
151 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; | |
152 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
153 | err = blkcipher_walk_virt(desc, &walk); | |
154 | ||
155 | kernel_neon_begin(); | |
156 | for (first = 1; (blocks = (walk.nbytes / AES_BLOCK_SIZE)); first = 0) { | |
157 | aes_cbc_encrypt(walk.dst.virt.addr, walk.src.virt.addr, | |
158 | (u8 *)ctx->key_enc, rounds, blocks, walk.iv, | |
159 | first); | |
f960d209 | 160 | err = blkcipher_walk_done(desc, &walk, walk.nbytes % AES_BLOCK_SIZE); |
49788fe2 AB |
161 | } |
162 | kernel_neon_end(); | |
163 | return err; | |
164 | } | |
165 | ||
166 | static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, | |
167 | struct scatterlist *src, unsigned int nbytes) | |
168 | { | |
169 | struct crypto_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
170 | int err, first, rounds = 6 + ctx->key_length / 4; | |
171 | struct blkcipher_walk walk; | |
172 | unsigned int blocks; | |
173 | ||
174 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; | |
175 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
176 | err = blkcipher_walk_virt(desc, &walk); | |
177 | ||
178 | kernel_neon_begin(); | |
179 | for (first = 1; (blocks = (walk.nbytes / AES_BLOCK_SIZE)); first = 0) { | |
180 | aes_cbc_decrypt(walk.dst.virt.addr, walk.src.virt.addr, | |
181 | (u8 *)ctx->key_dec, rounds, blocks, walk.iv, | |
182 | first); | |
f960d209 | 183 | err = blkcipher_walk_done(desc, &walk, walk.nbytes % AES_BLOCK_SIZE); |
49788fe2 AB |
184 | } |
185 | kernel_neon_end(); | |
186 | return err; | |
187 | } | |
188 | ||
189 | static int ctr_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, | |
190 | struct scatterlist *src, unsigned int nbytes) | |
191 | { | |
192 | struct crypto_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
193 | int err, first, rounds = 6 + ctx->key_length / 4; | |
194 | struct blkcipher_walk walk; | |
195 | int blocks; | |
196 | ||
197 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; | |
198 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
199 | err = blkcipher_walk_virt_block(desc, &walk, AES_BLOCK_SIZE); | |
200 | ||
201 | first = 1; | |
202 | kernel_neon_begin(); | |
203 | while ((blocks = (walk.nbytes / AES_BLOCK_SIZE))) { | |
204 | aes_ctr_encrypt(walk.dst.virt.addr, walk.src.virt.addr, | |
205 | (u8 *)ctx->key_enc, rounds, blocks, walk.iv, | |
206 | first); | |
207 | first = 0; | |
208 | nbytes -= blocks * AES_BLOCK_SIZE; | |
209 | if (nbytes && nbytes == walk.nbytes % AES_BLOCK_SIZE) | |
210 | break; | |
211 | err = blkcipher_walk_done(desc, &walk, | |
212 | walk.nbytes % AES_BLOCK_SIZE); | |
213 | } | |
214 | if (nbytes) { | |
215 | u8 *tdst = walk.dst.virt.addr + blocks * AES_BLOCK_SIZE; | |
216 | u8 *tsrc = walk.src.virt.addr + blocks * AES_BLOCK_SIZE; | |
217 | u8 __aligned(8) tail[AES_BLOCK_SIZE]; | |
218 | ||
219 | /* | |
220 | * Minimum alignment is 8 bytes, so if nbytes is <= 8, we need | |
221 | * to tell aes_ctr_encrypt() to only read half a block. | |
222 | */ | |
223 | blocks = (nbytes <= 8) ? -1 : 1; | |
224 | ||
225 | aes_ctr_encrypt(tail, tsrc, (u8 *)ctx->key_enc, rounds, | |
226 | blocks, walk.iv, first); | |
227 | memcpy(tdst, tail, nbytes); | |
228 | err = blkcipher_walk_done(desc, &walk, 0); | |
229 | } | |
230 | kernel_neon_end(); | |
231 | ||
232 | return err; | |
233 | } | |
234 | ||
235 | static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, | |
236 | struct scatterlist *src, unsigned int nbytes) | |
237 | { | |
238 | struct crypto_aes_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
239 | int err, first, rounds = 6 + ctx->key1.key_length / 4; | |
240 | struct blkcipher_walk walk; | |
241 | unsigned int blocks; | |
242 | ||
243 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; | |
244 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
245 | err = blkcipher_walk_virt(desc, &walk); | |
246 | ||
247 | kernel_neon_begin(); | |
248 | for (first = 1; (blocks = (walk.nbytes / AES_BLOCK_SIZE)); first = 0) { | |
249 | aes_xts_encrypt(walk.dst.virt.addr, walk.src.virt.addr, | |
250 | (u8 *)ctx->key1.key_enc, rounds, blocks, | |
251 | (u8 *)ctx->key2.key_enc, walk.iv, first); | |
f960d209 | 252 | err = blkcipher_walk_done(desc, &walk, walk.nbytes % AES_BLOCK_SIZE); |
49788fe2 AB |
253 | } |
254 | kernel_neon_end(); | |
255 | ||
256 | return err; | |
257 | } | |
258 | ||
259 | static int xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, | |
260 | struct scatterlist *src, unsigned int nbytes) | |
261 | { | |
262 | struct crypto_aes_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
263 | int err, first, rounds = 6 + ctx->key1.key_length / 4; | |
264 | struct blkcipher_walk walk; | |
265 | unsigned int blocks; | |
266 | ||
267 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; | |
268 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
269 | err = blkcipher_walk_virt(desc, &walk); | |
270 | ||
271 | kernel_neon_begin(); | |
272 | for (first = 1; (blocks = (walk.nbytes / AES_BLOCK_SIZE)); first = 0) { | |
273 | aes_xts_decrypt(walk.dst.virt.addr, walk.src.virt.addr, | |
274 | (u8 *)ctx->key1.key_dec, rounds, blocks, | |
275 | (u8 *)ctx->key2.key_enc, walk.iv, first); | |
f960d209 | 276 | err = blkcipher_walk_done(desc, &walk, walk.nbytes % AES_BLOCK_SIZE); |
49788fe2 AB |
277 | } |
278 | kernel_neon_end(); | |
279 | ||
280 | return err; | |
281 | } | |
282 | ||
283 | static struct crypto_alg aes_algs[] = { { | |
284 | .cra_name = "__ecb-aes-" MODE, | |
285 | .cra_driver_name = "__driver-ecb-aes-" MODE, | |
286 | .cra_priority = 0, | |
cd98411c SM |
287 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | |
288 | CRYPTO_ALG_INTERNAL, | |
49788fe2 AB |
289 | .cra_blocksize = AES_BLOCK_SIZE, |
290 | .cra_ctxsize = sizeof(struct crypto_aes_ctx), | |
291 | .cra_alignmask = 7, | |
292 | .cra_type = &crypto_blkcipher_type, | |
293 | .cra_module = THIS_MODULE, | |
294 | .cra_blkcipher = { | |
295 | .min_keysize = AES_MIN_KEY_SIZE, | |
296 | .max_keysize = AES_MAX_KEY_SIZE, | |
bee038a4 | 297 | .ivsize = 0, |
12ac3efe | 298 | .setkey = aes_setkey, |
49788fe2 AB |
299 | .encrypt = ecb_encrypt, |
300 | .decrypt = ecb_decrypt, | |
301 | }, | |
302 | }, { | |
303 | .cra_name = "__cbc-aes-" MODE, | |
304 | .cra_driver_name = "__driver-cbc-aes-" MODE, | |
305 | .cra_priority = 0, | |
cd98411c SM |
306 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | |
307 | CRYPTO_ALG_INTERNAL, | |
49788fe2 AB |
308 | .cra_blocksize = AES_BLOCK_SIZE, |
309 | .cra_ctxsize = sizeof(struct crypto_aes_ctx), | |
310 | .cra_alignmask = 7, | |
311 | .cra_type = &crypto_blkcipher_type, | |
312 | .cra_module = THIS_MODULE, | |
313 | .cra_blkcipher = { | |
314 | .min_keysize = AES_MIN_KEY_SIZE, | |
315 | .max_keysize = AES_MAX_KEY_SIZE, | |
316 | .ivsize = AES_BLOCK_SIZE, | |
12ac3efe | 317 | .setkey = aes_setkey, |
49788fe2 AB |
318 | .encrypt = cbc_encrypt, |
319 | .decrypt = cbc_decrypt, | |
320 | }, | |
321 | }, { | |
322 | .cra_name = "__ctr-aes-" MODE, | |
323 | .cra_driver_name = "__driver-ctr-aes-" MODE, | |
324 | .cra_priority = 0, | |
cd98411c SM |
325 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | |
326 | CRYPTO_ALG_INTERNAL, | |
49788fe2 AB |
327 | .cra_blocksize = 1, |
328 | .cra_ctxsize = sizeof(struct crypto_aes_ctx), | |
329 | .cra_alignmask = 7, | |
330 | .cra_type = &crypto_blkcipher_type, | |
331 | .cra_module = THIS_MODULE, | |
332 | .cra_blkcipher = { | |
333 | .min_keysize = AES_MIN_KEY_SIZE, | |
334 | .max_keysize = AES_MAX_KEY_SIZE, | |
335 | .ivsize = AES_BLOCK_SIZE, | |
12ac3efe | 336 | .setkey = aes_setkey, |
49788fe2 AB |
337 | .encrypt = ctr_encrypt, |
338 | .decrypt = ctr_encrypt, | |
339 | }, | |
340 | }, { | |
341 | .cra_name = "__xts-aes-" MODE, | |
342 | .cra_driver_name = "__driver-xts-aes-" MODE, | |
343 | .cra_priority = 0, | |
cd98411c SM |
344 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | |
345 | CRYPTO_ALG_INTERNAL, | |
49788fe2 AB |
346 | .cra_blocksize = AES_BLOCK_SIZE, |
347 | .cra_ctxsize = sizeof(struct crypto_aes_xts_ctx), | |
348 | .cra_alignmask = 7, | |
349 | .cra_type = &crypto_blkcipher_type, | |
350 | .cra_module = THIS_MODULE, | |
351 | .cra_blkcipher = { | |
352 | .min_keysize = 2 * AES_MIN_KEY_SIZE, | |
353 | .max_keysize = 2 * AES_MAX_KEY_SIZE, | |
354 | .ivsize = AES_BLOCK_SIZE, | |
355 | .setkey = xts_set_key, | |
356 | .encrypt = xts_encrypt, | |
357 | .decrypt = xts_decrypt, | |
358 | }, | |
359 | }, { | |
360 | .cra_name = "ecb(aes)", | |
361 | .cra_driver_name = "ecb-aes-" MODE, | |
362 | .cra_priority = PRIO, | |
363 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC, | |
364 | .cra_blocksize = AES_BLOCK_SIZE, | |
365 | .cra_ctxsize = sizeof(struct async_helper_ctx), | |
366 | .cra_alignmask = 7, | |
367 | .cra_type = &crypto_ablkcipher_type, | |
368 | .cra_module = THIS_MODULE, | |
369 | .cra_init = ablk_init, | |
370 | .cra_exit = ablk_exit, | |
371 | .cra_ablkcipher = { | |
372 | .min_keysize = AES_MIN_KEY_SIZE, | |
373 | .max_keysize = AES_MAX_KEY_SIZE, | |
bee038a4 | 374 | .ivsize = 0, |
49788fe2 AB |
375 | .setkey = ablk_set_key, |
376 | .encrypt = ablk_encrypt, | |
377 | .decrypt = ablk_decrypt, | |
378 | } | |
379 | }, { | |
380 | .cra_name = "cbc(aes)", | |
381 | .cra_driver_name = "cbc-aes-" MODE, | |
382 | .cra_priority = PRIO, | |
383 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC, | |
384 | .cra_blocksize = AES_BLOCK_SIZE, | |
385 | .cra_ctxsize = sizeof(struct async_helper_ctx), | |
386 | .cra_alignmask = 7, | |
387 | .cra_type = &crypto_ablkcipher_type, | |
388 | .cra_module = THIS_MODULE, | |
389 | .cra_init = ablk_init, | |
390 | .cra_exit = ablk_exit, | |
391 | .cra_ablkcipher = { | |
392 | .min_keysize = AES_MIN_KEY_SIZE, | |
393 | .max_keysize = AES_MAX_KEY_SIZE, | |
394 | .ivsize = AES_BLOCK_SIZE, | |
395 | .setkey = ablk_set_key, | |
396 | .encrypt = ablk_encrypt, | |
397 | .decrypt = ablk_decrypt, | |
398 | } | |
399 | }, { | |
400 | .cra_name = "ctr(aes)", | |
401 | .cra_driver_name = "ctr-aes-" MODE, | |
402 | .cra_priority = PRIO, | |
403 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC, | |
404 | .cra_blocksize = 1, | |
405 | .cra_ctxsize = sizeof(struct async_helper_ctx), | |
406 | .cra_alignmask = 7, | |
407 | .cra_type = &crypto_ablkcipher_type, | |
408 | .cra_module = THIS_MODULE, | |
409 | .cra_init = ablk_init, | |
410 | .cra_exit = ablk_exit, | |
411 | .cra_ablkcipher = { | |
412 | .min_keysize = AES_MIN_KEY_SIZE, | |
413 | .max_keysize = AES_MAX_KEY_SIZE, | |
414 | .ivsize = AES_BLOCK_SIZE, | |
415 | .setkey = ablk_set_key, | |
416 | .encrypt = ablk_encrypt, | |
417 | .decrypt = ablk_decrypt, | |
418 | } | |
419 | }, { | |
420 | .cra_name = "xts(aes)", | |
421 | .cra_driver_name = "xts-aes-" MODE, | |
422 | .cra_priority = PRIO, | |
423 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC, | |
424 | .cra_blocksize = AES_BLOCK_SIZE, | |
425 | .cra_ctxsize = sizeof(struct async_helper_ctx), | |
426 | .cra_alignmask = 7, | |
427 | .cra_type = &crypto_ablkcipher_type, | |
428 | .cra_module = THIS_MODULE, | |
429 | .cra_init = ablk_init, | |
430 | .cra_exit = ablk_exit, | |
431 | .cra_ablkcipher = { | |
432 | .min_keysize = 2 * AES_MIN_KEY_SIZE, | |
433 | .max_keysize = 2 * AES_MAX_KEY_SIZE, | |
434 | .ivsize = AES_BLOCK_SIZE, | |
435 | .setkey = ablk_set_key, | |
436 | .encrypt = ablk_encrypt, | |
437 | .decrypt = ablk_decrypt, | |
438 | } | |
439 | } }; | |
440 | ||
441 | static int __init aes_init(void) | |
442 | { | |
443 | return crypto_register_algs(aes_algs, ARRAY_SIZE(aes_algs)); | |
444 | } | |
445 | ||
446 | static void __exit aes_exit(void) | |
447 | { | |
448 | crypto_unregister_algs(aes_algs, ARRAY_SIZE(aes_algs)); | |
449 | } | |
450 | ||
451 | #ifdef USE_V8_CRYPTO_EXTENSIONS | |
452 | module_cpu_feature_match(AES, aes_init); | |
453 | #else | |
454 | module_init(aes_init); | |
455 | #endif | |
456 | module_exit(aes_exit); |