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86464859 AB |
1 | /* |
2 | * aes-ce-glue.c - wrapper code for ARMv8 AES | |
3 | * | |
4 | * Copyright (C) 2015 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/hwcap.h> | |
12 | #include <asm/neon.h> | |
13 | #include <asm/hwcap.h> | |
14 | #include <crypto/aes.h> | |
15 | #include <crypto/ablk_helper.h> | |
16 | #include <crypto/algapi.h> | |
17 | #include <linux/module.h> | |
18 | ||
19 | MODULE_DESCRIPTION("AES-ECB/CBC/CTR/XTS using ARMv8 Crypto Extensions"); | |
20 | MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>"); | |
21 | MODULE_LICENSE("GPL v2"); | |
22 | ||
23 | /* defined in aes-ce-core.S */ | |
24 | asmlinkage u32 ce_aes_sub(u32 input); | |
25 | asmlinkage void ce_aes_invert(void *dst, void *src); | |
26 | ||
27 | asmlinkage void ce_aes_ecb_encrypt(u8 out[], u8 const in[], u8 const rk[], | |
28 | int rounds, int blocks); | |
29 | asmlinkage void ce_aes_ecb_decrypt(u8 out[], u8 const in[], u8 const rk[], | |
30 | int rounds, int blocks); | |
31 | ||
32 | asmlinkage void ce_aes_cbc_encrypt(u8 out[], u8 const in[], u8 const rk[], | |
33 | int rounds, int blocks, u8 iv[]); | |
34 | asmlinkage void ce_aes_cbc_decrypt(u8 out[], u8 const in[], u8 const rk[], | |
35 | int rounds, int blocks, u8 iv[]); | |
36 | ||
37 | asmlinkage void ce_aes_ctr_encrypt(u8 out[], u8 const in[], u8 const rk[], | |
38 | int rounds, int blocks, u8 ctr[]); | |
39 | ||
40 | asmlinkage void ce_aes_xts_encrypt(u8 out[], u8 const in[], u8 const rk1[], | |
41 | int rounds, int blocks, u8 iv[], | |
42 | u8 const rk2[], int first); | |
43 | asmlinkage void ce_aes_xts_decrypt(u8 out[], u8 const in[], u8 const rk1[], | |
44 | int rounds, int blocks, u8 iv[], | |
45 | u8 const rk2[], int first); | |
46 | ||
47 | struct aes_block { | |
48 | u8 b[AES_BLOCK_SIZE]; | |
49 | }; | |
50 | ||
51 | static int num_rounds(struct crypto_aes_ctx *ctx) | |
52 | { | |
53 | /* | |
54 | * # of rounds specified by AES: | |
55 | * 128 bit key 10 rounds | |
56 | * 192 bit key 12 rounds | |
57 | * 256 bit key 14 rounds | |
58 | * => n byte key => 6 + (n/4) rounds | |
59 | */ | |
60 | return 6 + ctx->key_length / 4; | |
61 | } | |
62 | ||
63 | static int ce_aes_expandkey(struct crypto_aes_ctx *ctx, const u8 *in_key, | |
64 | unsigned int key_len) | |
65 | { | |
66 | /* | |
67 | * The AES key schedule round constants | |
68 | */ | |
69 | static u8 const rcon[] = { | |
70 | 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, | |
71 | }; | |
72 | ||
73 | u32 kwords = key_len / sizeof(u32); | |
74 | struct aes_block *key_enc, *key_dec; | |
75 | int i, j; | |
76 | ||
77 | if (key_len != AES_KEYSIZE_128 && | |
78 | key_len != AES_KEYSIZE_192 && | |
79 | key_len != AES_KEYSIZE_256) | |
80 | return -EINVAL; | |
81 | ||
82 | memcpy(ctx->key_enc, in_key, key_len); | |
83 | ctx->key_length = key_len; | |
84 | ||
85 | kernel_neon_begin(); | |
86 | for (i = 0; i < sizeof(rcon); i++) { | |
87 | u32 *rki = ctx->key_enc + (i * kwords); | |
88 | u32 *rko = rki + kwords; | |
89 | ||
90 | rko[0] = ror32(ce_aes_sub(rki[kwords - 1]), 8); | |
91 | rko[0] = rko[0] ^ rki[0] ^ rcon[i]; | |
92 | rko[1] = rko[0] ^ rki[1]; | |
93 | rko[2] = rko[1] ^ rki[2]; | |
94 | rko[3] = rko[2] ^ rki[3]; | |
95 | ||
96 | if (key_len == AES_KEYSIZE_192) { | |
97 | if (i >= 7) | |
98 | break; | |
99 | rko[4] = rko[3] ^ rki[4]; | |
100 | rko[5] = rko[4] ^ rki[5]; | |
101 | } else if (key_len == AES_KEYSIZE_256) { | |
102 | if (i >= 6) | |
103 | break; | |
104 | rko[4] = ce_aes_sub(rko[3]) ^ rki[4]; | |
105 | rko[5] = rko[4] ^ rki[5]; | |
106 | rko[6] = rko[5] ^ rki[6]; | |
107 | rko[7] = rko[6] ^ rki[7]; | |
108 | } | |
109 | } | |
110 | ||
111 | /* | |
112 | * Generate the decryption keys for the Equivalent Inverse Cipher. | |
113 | * This involves reversing the order of the round keys, and applying | |
114 | * the Inverse Mix Columns transformation on all but the first and | |
115 | * the last one. | |
116 | */ | |
117 | key_enc = (struct aes_block *)ctx->key_enc; | |
118 | key_dec = (struct aes_block *)ctx->key_dec; | |
119 | j = num_rounds(ctx); | |
120 | ||
121 | key_dec[0] = key_enc[j]; | |
122 | for (i = 1, j--; j > 0; i++, j--) | |
123 | ce_aes_invert(key_dec + i, key_enc + j); | |
124 | key_dec[i] = key_enc[0]; | |
125 | ||
126 | kernel_neon_end(); | |
127 | return 0; | |
128 | } | |
129 | ||
130 | static int ce_aes_setkey(struct crypto_tfm *tfm, const u8 *in_key, | |
131 | unsigned int key_len) | |
132 | { | |
133 | struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm); | |
134 | int ret; | |
135 | ||
136 | ret = ce_aes_expandkey(ctx, in_key, key_len); | |
137 | if (!ret) | |
138 | return 0; | |
139 | ||
140 | tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; | |
141 | return -EINVAL; | |
142 | } | |
143 | ||
144 | struct crypto_aes_xts_ctx { | |
145 | struct crypto_aes_ctx key1; | |
146 | struct crypto_aes_ctx __aligned(8) key2; | |
147 | }; | |
148 | ||
149 | static int xts_set_key(struct crypto_tfm *tfm, const u8 *in_key, | |
150 | unsigned int key_len) | |
151 | { | |
152 | struct crypto_aes_xts_ctx *ctx = crypto_tfm_ctx(tfm); | |
153 | int ret; | |
154 | ||
155 | ret = ce_aes_expandkey(&ctx->key1, in_key, key_len / 2); | |
156 | if (!ret) | |
157 | ret = ce_aes_expandkey(&ctx->key2, &in_key[key_len / 2], | |
158 | key_len / 2); | |
159 | if (!ret) | |
160 | return 0; | |
161 | ||
162 | tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; | |
163 | return -EINVAL; | |
164 | } | |
165 | ||
166 | static int ecb_encrypt(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 | struct blkcipher_walk walk; | |
171 | unsigned int blocks; | |
172 | int err; | |
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 | while ((blocks = (walk.nbytes / AES_BLOCK_SIZE))) { | |
180 | ce_aes_ecb_encrypt(walk.dst.virt.addr, walk.src.virt.addr, | |
181 | (u8 *)ctx->key_enc, num_rounds(ctx), blocks); | |
182 | err = blkcipher_walk_done(desc, &walk, | |
183 | walk.nbytes % AES_BLOCK_SIZE); | |
184 | } | |
185 | kernel_neon_end(); | |
186 | return err; | |
187 | } | |
188 | ||
189 | static int ecb_decrypt(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 | struct blkcipher_walk walk; | |
194 | unsigned int blocks; | |
195 | int err; | |
196 | ||
197 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; | |
198 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
199 | err = blkcipher_walk_virt(desc, &walk); | |
200 | ||
201 | kernel_neon_begin(); | |
202 | while ((blocks = (walk.nbytes / AES_BLOCK_SIZE))) { | |
203 | ce_aes_ecb_decrypt(walk.dst.virt.addr, walk.src.virt.addr, | |
204 | (u8 *)ctx->key_dec, num_rounds(ctx), blocks); | |
205 | err = blkcipher_walk_done(desc, &walk, | |
206 | walk.nbytes % AES_BLOCK_SIZE); | |
207 | } | |
208 | kernel_neon_end(); | |
209 | return err; | |
210 | } | |
211 | ||
212 | static int cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, | |
213 | struct scatterlist *src, unsigned int nbytes) | |
214 | { | |
215 | struct crypto_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
216 | struct blkcipher_walk walk; | |
217 | unsigned int blocks; | |
218 | int err; | |
219 | ||
220 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; | |
221 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
222 | err = blkcipher_walk_virt(desc, &walk); | |
223 | ||
224 | kernel_neon_begin(); | |
225 | while ((blocks = (walk.nbytes / AES_BLOCK_SIZE))) { | |
226 | ce_aes_cbc_encrypt(walk.dst.virt.addr, walk.src.virt.addr, | |
227 | (u8 *)ctx->key_enc, num_rounds(ctx), blocks, | |
228 | walk.iv); | |
229 | err = blkcipher_walk_done(desc, &walk, | |
230 | walk.nbytes % AES_BLOCK_SIZE); | |
231 | } | |
232 | kernel_neon_end(); | |
233 | return err; | |
234 | } | |
235 | ||
236 | static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, | |
237 | struct scatterlist *src, unsigned int nbytes) | |
238 | { | |
239 | struct crypto_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
240 | struct blkcipher_walk walk; | |
241 | unsigned int blocks; | |
242 | int err; | |
243 | ||
244 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; | |
245 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
246 | err = blkcipher_walk_virt(desc, &walk); | |
247 | ||
248 | kernel_neon_begin(); | |
249 | while ((blocks = (walk.nbytes / AES_BLOCK_SIZE))) { | |
250 | ce_aes_cbc_decrypt(walk.dst.virt.addr, walk.src.virt.addr, | |
251 | (u8 *)ctx->key_dec, num_rounds(ctx), blocks, | |
252 | walk.iv); | |
253 | err = blkcipher_walk_done(desc, &walk, | |
254 | walk.nbytes % AES_BLOCK_SIZE); | |
255 | } | |
256 | kernel_neon_end(); | |
257 | return err; | |
258 | } | |
259 | ||
260 | static int ctr_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, | |
261 | struct scatterlist *src, unsigned int nbytes) | |
262 | { | |
263 | struct crypto_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
264 | struct blkcipher_walk walk; | |
265 | int err, blocks; | |
266 | ||
267 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; | |
268 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
269 | err = blkcipher_walk_virt_block(desc, &walk, AES_BLOCK_SIZE); | |
270 | ||
271 | kernel_neon_begin(); | |
272 | while ((blocks = (walk.nbytes / AES_BLOCK_SIZE))) { | |
273 | ce_aes_ctr_encrypt(walk.dst.virt.addr, walk.src.virt.addr, | |
274 | (u8 *)ctx->key_enc, num_rounds(ctx), blocks, | |
275 | walk.iv); | |
276 | nbytes -= blocks * AES_BLOCK_SIZE; | |
277 | if (nbytes && nbytes == walk.nbytes % AES_BLOCK_SIZE) | |
278 | break; | |
279 | err = blkcipher_walk_done(desc, &walk, | |
280 | walk.nbytes % AES_BLOCK_SIZE); | |
281 | } | |
282 | if (nbytes) { | |
283 | u8 *tdst = walk.dst.virt.addr + blocks * AES_BLOCK_SIZE; | |
284 | u8 *tsrc = walk.src.virt.addr + blocks * AES_BLOCK_SIZE; | |
285 | u8 __aligned(8) tail[AES_BLOCK_SIZE]; | |
286 | ||
287 | /* | |
288 | * Minimum alignment is 8 bytes, so if nbytes is <= 8, we need | |
289 | * to tell aes_ctr_encrypt() to only read half a block. | |
290 | */ | |
291 | blocks = (nbytes <= 8) ? -1 : 1; | |
292 | ||
293 | ce_aes_ctr_encrypt(tail, tsrc, (u8 *)ctx->key_enc, | |
294 | num_rounds(ctx), blocks, walk.iv); | |
295 | memcpy(tdst, tail, nbytes); | |
296 | err = blkcipher_walk_done(desc, &walk, 0); | |
297 | } | |
298 | kernel_neon_end(); | |
299 | ||
300 | return err; | |
301 | } | |
302 | ||
303 | static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, | |
304 | struct scatterlist *src, unsigned int nbytes) | |
305 | { | |
306 | struct crypto_aes_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
307 | int err, first, rounds = num_rounds(&ctx->key1); | |
308 | struct blkcipher_walk walk; | |
309 | unsigned int blocks; | |
310 | ||
311 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; | |
312 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
313 | err = blkcipher_walk_virt(desc, &walk); | |
314 | ||
315 | kernel_neon_begin(); | |
316 | for (first = 1; (blocks = (walk.nbytes / AES_BLOCK_SIZE)); first = 0) { | |
317 | ce_aes_xts_encrypt(walk.dst.virt.addr, walk.src.virt.addr, | |
318 | (u8 *)ctx->key1.key_enc, rounds, blocks, | |
319 | walk.iv, (u8 *)ctx->key2.key_enc, first); | |
320 | err = blkcipher_walk_done(desc, &walk, | |
321 | walk.nbytes % AES_BLOCK_SIZE); | |
322 | } | |
323 | kernel_neon_end(); | |
324 | ||
325 | return err; | |
326 | } | |
327 | ||
328 | static int xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, | |
329 | struct scatterlist *src, unsigned int nbytes) | |
330 | { | |
331 | struct crypto_aes_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); | |
332 | int err, first, rounds = num_rounds(&ctx->key1); | |
333 | struct blkcipher_walk walk; | |
334 | unsigned int blocks; | |
335 | ||
336 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; | |
337 | blkcipher_walk_init(&walk, dst, src, nbytes); | |
338 | err = blkcipher_walk_virt(desc, &walk); | |
339 | ||
340 | kernel_neon_begin(); | |
341 | for (first = 1; (blocks = (walk.nbytes / AES_BLOCK_SIZE)); first = 0) { | |
342 | ce_aes_xts_decrypt(walk.dst.virt.addr, walk.src.virt.addr, | |
343 | (u8 *)ctx->key1.key_dec, rounds, blocks, | |
344 | walk.iv, (u8 *)ctx->key2.key_enc, first); | |
345 | err = blkcipher_walk_done(desc, &walk, | |
346 | walk.nbytes % AES_BLOCK_SIZE); | |
347 | } | |
348 | kernel_neon_end(); | |
349 | ||
350 | return err; | |
351 | } | |
352 | ||
353 | static struct crypto_alg aes_algs[] = { { | |
354 | .cra_name = "__ecb-aes-ce", | |
355 | .cra_driver_name = "__driver-ecb-aes-ce", | |
356 | .cra_priority = 0, | |
94a7e5e8 SM |
357 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | |
358 | CRYPTO_ALG_INTERNAL, | |
86464859 AB |
359 | .cra_blocksize = AES_BLOCK_SIZE, |
360 | .cra_ctxsize = sizeof(struct crypto_aes_ctx), | |
361 | .cra_alignmask = 7, | |
362 | .cra_type = &crypto_blkcipher_type, | |
363 | .cra_module = THIS_MODULE, | |
364 | .cra_blkcipher = { | |
365 | .min_keysize = AES_MIN_KEY_SIZE, | |
366 | .max_keysize = AES_MAX_KEY_SIZE, | |
bee038a4 | 367 | .ivsize = 0, |
86464859 AB |
368 | .setkey = ce_aes_setkey, |
369 | .encrypt = ecb_encrypt, | |
370 | .decrypt = ecb_decrypt, | |
371 | }, | |
372 | }, { | |
373 | .cra_name = "__cbc-aes-ce", | |
374 | .cra_driver_name = "__driver-cbc-aes-ce", | |
375 | .cra_priority = 0, | |
94a7e5e8 SM |
376 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | |
377 | CRYPTO_ALG_INTERNAL, | |
86464859 AB |
378 | .cra_blocksize = AES_BLOCK_SIZE, |
379 | .cra_ctxsize = sizeof(struct crypto_aes_ctx), | |
380 | .cra_alignmask = 7, | |
381 | .cra_type = &crypto_blkcipher_type, | |
382 | .cra_module = THIS_MODULE, | |
383 | .cra_blkcipher = { | |
384 | .min_keysize = AES_MIN_KEY_SIZE, | |
385 | .max_keysize = AES_MAX_KEY_SIZE, | |
386 | .ivsize = AES_BLOCK_SIZE, | |
387 | .setkey = ce_aes_setkey, | |
388 | .encrypt = cbc_encrypt, | |
389 | .decrypt = cbc_decrypt, | |
390 | }, | |
391 | }, { | |
392 | .cra_name = "__ctr-aes-ce", | |
393 | .cra_driver_name = "__driver-ctr-aes-ce", | |
394 | .cra_priority = 0, | |
94a7e5e8 SM |
395 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | |
396 | CRYPTO_ALG_INTERNAL, | |
86464859 AB |
397 | .cra_blocksize = 1, |
398 | .cra_ctxsize = sizeof(struct crypto_aes_ctx), | |
399 | .cra_alignmask = 7, | |
400 | .cra_type = &crypto_blkcipher_type, | |
401 | .cra_module = THIS_MODULE, | |
402 | .cra_blkcipher = { | |
403 | .min_keysize = AES_MIN_KEY_SIZE, | |
404 | .max_keysize = AES_MAX_KEY_SIZE, | |
405 | .ivsize = AES_BLOCK_SIZE, | |
406 | .setkey = ce_aes_setkey, | |
407 | .encrypt = ctr_encrypt, | |
408 | .decrypt = ctr_encrypt, | |
409 | }, | |
410 | }, { | |
411 | .cra_name = "__xts-aes-ce", | |
412 | .cra_driver_name = "__driver-xts-aes-ce", | |
413 | .cra_priority = 0, | |
94a7e5e8 SM |
414 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | |
415 | CRYPTO_ALG_INTERNAL, | |
86464859 AB |
416 | .cra_blocksize = AES_BLOCK_SIZE, |
417 | .cra_ctxsize = sizeof(struct crypto_aes_xts_ctx), | |
418 | .cra_alignmask = 7, | |
419 | .cra_type = &crypto_blkcipher_type, | |
420 | .cra_module = THIS_MODULE, | |
421 | .cra_blkcipher = { | |
422 | .min_keysize = 2 * AES_MIN_KEY_SIZE, | |
423 | .max_keysize = 2 * AES_MAX_KEY_SIZE, | |
424 | .ivsize = AES_BLOCK_SIZE, | |
425 | .setkey = xts_set_key, | |
426 | .encrypt = xts_encrypt, | |
427 | .decrypt = xts_decrypt, | |
428 | }, | |
429 | }, { | |
430 | .cra_name = "ecb(aes)", | |
431 | .cra_driver_name = "ecb-aes-ce", | |
432 | .cra_priority = 300, | |
433 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC, | |
434 | .cra_blocksize = AES_BLOCK_SIZE, | |
435 | .cra_ctxsize = sizeof(struct async_helper_ctx), | |
436 | .cra_alignmask = 7, | |
437 | .cra_type = &crypto_ablkcipher_type, | |
438 | .cra_module = THIS_MODULE, | |
439 | .cra_init = ablk_init, | |
440 | .cra_exit = ablk_exit, | |
441 | .cra_ablkcipher = { | |
442 | .min_keysize = AES_MIN_KEY_SIZE, | |
443 | .max_keysize = AES_MAX_KEY_SIZE, | |
bee038a4 | 444 | .ivsize = 0, |
86464859 AB |
445 | .setkey = ablk_set_key, |
446 | .encrypt = ablk_encrypt, | |
447 | .decrypt = ablk_decrypt, | |
448 | } | |
449 | }, { | |
450 | .cra_name = "cbc(aes)", | |
451 | .cra_driver_name = "cbc-aes-ce", | |
452 | .cra_priority = 300, | |
453 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC, | |
454 | .cra_blocksize = AES_BLOCK_SIZE, | |
455 | .cra_ctxsize = sizeof(struct async_helper_ctx), | |
456 | .cra_alignmask = 7, | |
457 | .cra_type = &crypto_ablkcipher_type, | |
458 | .cra_module = THIS_MODULE, | |
459 | .cra_init = ablk_init, | |
460 | .cra_exit = ablk_exit, | |
461 | .cra_ablkcipher = { | |
462 | .min_keysize = AES_MIN_KEY_SIZE, | |
463 | .max_keysize = AES_MAX_KEY_SIZE, | |
464 | .ivsize = AES_BLOCK_SIZE, | |
465 | .setkey = ablk_set_key, | |
466 | .encrypt = ablk_encrypt, | |
467 | .decrypt = ablk_decrypt, | |
468 | } | |
469 | }, { | |
470 | .cra_name = "ctr(aes)", | |
471 | .cra_driver_name = "ctr-aes-ce", | |
472 | .cra_priority = 300, | |
473 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC, | |
474 | .cra_blocksize = 1, | |
475 | .cra_ctxsize = sizeof(struct async_helper_ctx), | |
476 | .cra_alignmask = 7, | |
477 | .cra_type = &crypto_ablkcipher_type, | |
478 | .cra_module = THIS_MODULE, | |
479 | .cra_init = ablk_init, | |
480 | .cra_exit = ablk_exit, | |
481 | .cra_ablkcipher = { | |
482 | .min_keysize = AES_MIN_KEY_SIZE, | |
483 | .max_keysize = AES_MAX_KEY_SIZE, | |
484 | .ivsize = AES_BLOCK_SIZE, | |
485 | .setkey = ablk_set_key, | |
486 | .encrypt = ablk_encrypt, | |
487 | .decrypt = ablk_decrypt, | |
488 | } | |
489 | }, { | |
490 | .cra_name = "xts(aes)", | |
491 | .cra_driver_name = "xts-aes-ce", | |
492 | .cra_priority = 300, | |
493 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER|CRYPTO_ALG_ASYNC, | |
494 | .cra_blocksize = AES_BLOCK_SIZE, | |
495 | .cra_ctxsize = sizeof(struct async_helper_ctx), | |
496 | .cra_alignmask = 7, | |
497 | .cra_type = &crypto_ablkcipher_type, | |
498 | .cra_module = THIS_MODULE, | |
499 | .cra_init = ablk_init, | |
500 | .cra_exit = ablk_exit, | |
501 | .cra_ablkcipher = { | |
502 | .min_keysize = 2 * AES_MIN_KEY_SIZE, | |
503 | .max_keysize = 2 * AES_MAX_KEY_SIZE, | |
504 | .ivsize = AES_BLOCK_SIZE, | |
505 | .setkey = ablk_set_key, | |
506 | .encrypt = ablk_encrypt, | |
507 | .decrypt = ablk_decrypt, | |
508 | } | |
509 | } }; | |
510 | ||
511 | static int __init aes_init(void) | |
512 | { | |
513 | if (!(elf_hwcap2 & HWCAP2_AES)) | |
514 | return -ENODEV; | |
515 | return crypto_register_algs(aes_algs, ARRAY_SIZE(aes_algs)); | |
516 | } | |
517 | ||
518 | static void __exit aes_exit(void) | |
519 | { | |
520 | crypto_unregister_algs(aes_algs, ARRAY_SIZE(aes_algs)); | |
521 | } | |
522 | ||
523 | module_init(aes_init); | |
524 | module_exit(aes_exit); |