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8ff59090 HX |
1 | /* |
2 | * algif_skcipher: User-space interface for skcipher algorithms | |
3 | * | |
4 | * This file provides the user-space API for symmetric key ciphers. | |
5 | * | |
6 | * Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the Free | |
10 | * Software Foundation; either version 2 of the License, or (at your option) | |
11 | * any later version. | |
12 | * | |
13 | */ | |
14 | ||
15 | #include <crypto/scatterwalk.h> | |
16 | #include <crypto/skcipher.h> | |
17 | #include <crypto/if_alg.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/list.h> | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/mm.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/net.h> | |
24 | #include <net/sock.h> | |
25 | ||
26 | struct skcipher_sg_list { | |
27 | struct list_head list; | |
28 | ||
29 | int cur; | |
30 | ||
31 | struct scatterlist sg[0]; | |
32 | }; | |
33 | ||
34 | struct skcipher_ctx { | |
35 | struct list_head tsgl; | |
36 | struct af_alg_sgl rsgl; | |
37 | ||
38 | void *iv; | |
39 | ||
40 | struct af_alg_completion completion; | |
41 | ||
42 | unsigned used; | |
43 | ||
44 | unsigned int len; | |
45 | bool more; | |
46 | bool merge; | |
47 | bool enc; | |
48 | ||
49 | struct ablkcipher_request req; | |
50 | }; | |
51 | ||
52 | #define MAX_SGL_ENTS ((PAGE_SIZE - sizeof(struct skcipher_sg_list)) / \ | |
53 | sizeof(struct scatterlist) - 1) | |
54 | ||
0f6bb83c | 55 | static inline int skcipher_sndbuf(struct sock *sk) |
8ff59090 HX |
56 | { |
57 | struct alg_sock *ask = alg_sk(sk); | |
58 | struct skcipher_ctx *ctx = ask->private; | |
59 | ||
0f6bb83c HX |
60 | return max_t(int, max_t(int, sk->sk_sndbuf & PAGE_MASK, PAGE_SIZE) - |
61 | ctx->used, 0); | |
62 | } | |
63 | ||
64 | static inline bool skcipher_writable(struct sock *sk) | |
65 | { | |
66 | return PAGE_SIZE <= skcipher_sndbuf(sk); | |
8ff59090 HX |
67 | } |
68 | ||
69 | static int skcipher_alloc_sgl(struct sock *sk) | |
70 | { | |
71 | struct alg_sock *ask = alg_sk(sk); | |
72 | struct skcipher_ctx *ctx = ask->private; | |
73 | struct skcipher_sg_list *sgl; | |
74 | struct scatterlist *sg = NULL; | |
75 | ||
76 | sgl = list_entry(ctx->tsgl.prev, struct skcipher_sg_list, list); | |
77 | if (!list_empty(&ctx->tsgl)) | |
78 | sg = sgl->sg; | |
79 | ||
80 | if (!sg || sgl->cur >= MAX_SGL_ENTS) { | |
81 | sgl = sock_kmalloc(sk, sizeof(*sgl) + | |
82 | sizeof(sgl->sg[0]) * (MAX_SGL_ENTS + 1), | |
83 | GFP_KERNEL); | |
84 | if (!sgl) | |
85 | return -ENOMEM; | |
86 | ||
87 | sg_init_table(sgl->sg, MAX_SGL_ENTS + 1); | |
88 | sgl->cur = 0; | |
89 | ||
90 | if (sg) | |
91 | scatterwalk_sg_chain(sg, MAX_SGL_ENTS + 1, sgl->sg); | |
92 | ||
93 | list_add_tail(&sgl->list, &ctx->tsgl); | |
94 | } | |
95 | ||
96 | return 0; | |
97 | } | |
98 | ||
99 | static void skcipher_pull_sgl(struct sock *sk, int used) | |
100 | { | |
101 | struct alg_sock *ask = alg_sk(sk); | |
102 | struct skcipher_ctx *ctx = ask->private; | |
103 | struct skcipher_sg_list *sgl; | |
104 | struct scatterlist *sg; | |
105 | int i; | |
106 | ||
107 | while (!list_empty(&ctx->tsgl)) { | |
108 | sgl = list_first_entry(&ctx->tsgl, struct skcipher_sg_list, | |
109 | list); | |
110 | sg = sgl->sg; | |
111 | ||
112 | for (i = 0; i < sgl->cur; i++) { | |
113 | int plen = min_t(int, used, sg[i].length); | |
114 | ||
115 | if (!sg_page(sg + i)) | |
116 | continue; | |
117 | ||
118 | sg[i].length -= plen; | |
119 | sg[i].offset += plen; | |
120 | ||
121 | used -= plen; | |
122 | ctx->used -= plen; | |
123 | ||
124 | if (sg[i].length) | |
125 | return; | |
126 | ||
127 | put_page(sg_page(sg + i)); | |
128 | sg_assign_page(sg + i, NULL); | |
129 | } | |
130 | ||
131 | list_del(&sgl->list); | |
132 | sock_kfree_s(sk, sgl, | |
133 | sizeof(*sgl) + sizeof(sgl->sg[0]) * | |
134 | (MAX_SGL_ENTS + 1)); | |
135 | } | |
136 | ||
137 | if (!ctx->used) | |
138 | ctx->merge = 0; | |
139 | } | |
140 | ||
141 | static void skcipher_free_sgl(struct sock *sk) | |
142 | { | |
143 | struct alg_sock *ask = alg_sk(sk); | |
144 | struct skcipher_ctx *ctx = ask->private; | |
145 | ||
146 | skcipher_pull_sgl(sk, ctx->used); | |
147 | } | |
148 | ||
149 | static int skcipher_wait_for_wmem(struct sock *sk, unsigned flags) | |
150 | { | |
151 | long timeout; | |
152 | DEFINE_WAIT(wait); | |
153 | int err = -ERESTARTSYS; | |
154 | ||
155 | if (flags & MSG_DONTWAIT) | |
156 | return -EAGAIN; | |
157 | ||
158 | set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags); | |
159 | ||
160 | for (;;) { | |
161 | if (signal_pending(current)) | |
162 | break; | |
163 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
164 | timeout = MAX_SCHEDULE_TIMEOUT; | |
165 | if (sk_wait_event(sk, &timeout, skcipher_writable(sk))) { | |
166 | err = 0; | |
167 | break; | |
168 | } | |
169 | } | |
170 | finish_wait(sk_sleep(sk), &wait); | |
171 | ||
172 | return err; | |
173 | } | |
174 | ||
175 | static void skcipher_wmem_wakeup(struct sock *sk) | |
176 | { | |
177 | struct socket_wq *wq; | |
178 | ||
179 | if (!skcipher_writable(sk)) | |
180 | return; | |
181 | ||
182 | rcu_read_lock(); | |
183 | wq = rcu_dereference(sk->sk_wq); | |
184 | if (wq_has_sleeper(wq)) | |
185 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | | |
186 | POLLRDNORM | | |
187 | POLLRDBAND); | |
188 | sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_IN); | |
189 | rcu_read_unlock(); | |
190 | } | |
191 | ||
192 | static int skcipher_wait_for_data(struct sock *sk, unsigned flags) | |
193 | { | |
194 | struct alg_sock *ask = alg_sk(sk); | |
195 | struct skcipher_ctx *ctx = ask->private; | |
196 | long timeout; | |
197 | DEFINE_WAIT(wait); | |
198 | int err = -ERESTARTSYS; | |
199 | ||
200 | if (flags & MSG_DONTWAIT) { | |
201 | return -EAGAIN; | |
202 | } | |
203 | ||
204 | set_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags); | |
205 | ||
206 | for (;;) { | |
207 | if (signal_pending(current)) | |
208 | break; | |
209 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); | |
210 | timeout = MAX_SCHEDULE_TIMEOUT; | |
211 | if (sk_wait_event(sk, &timeout, ctx->used)) { | |
212 | err = 0; | |
213 | break; | |
214 | } | |
215 | } | |
216 | finish_wait(sk_sleep(sk), &wait); | |
217 | ||
218 | clear_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags); | |
219 | ||
220 | return err; | |
221 | } | |
222 | ||
223 | static void skcipher_data_wakeup(struct sock *sk) | |
224 | { | |
225 | struct alg_sock *ask = alg_sk(sk); | |
226 | struct skcipher_ctx *ctx = ask->private; | |
227 | struct socket_wq *wq; | |
228 | ||
229 | if (!ctx->used) | |
230 | return; | |
231 | ||
232 | rcu_read_lock(); | |
233 | wq = rcu_dereference(sk->sk_wq); | |
234 | if (wq_has_sleeper(wq)) | |
235 | wake_up_interruptible_sync_poll(&wq->wait, POLLOUT | | |
236 | POLLRDNORM | | |
237 | POLLRDBAND); | |
238 | sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT); | |
239 | rcu_read_unlock(); | |
240 | } | |
241 | ||
242 | static int skcipher_sendmsg(struct kiocb *unused, struct socket *sock, | |
243 | struct msghdr *msg, size_t size) | |
244 | { | |
245 | struct sock *sk = sock->sk; | |
246 | struct alg_sock *ask = alg_sk(sk); | |
247 | struct skcipher_ctx *ctx = ask->private; | |
248 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(&ctx->req); | |
249 | unsigned ivsize = crypto_ablkcipher_ivsize(tfm); | |
250 | struct skcipher_sg_list *sgl; | |
251 | struct af_alg_control con = {}; | |
252 | long copied = 0; | |
253 | bool enc = 0; | |
8ff59090 HX |
254 | int err; |
255 | int i; | |
256 | ||
257 | if (msg->msg_controllen) { | |
258 | err = af_alg_cmsg_send(msg, &con); | |
259 | if (err) | |
260 | return err; | |
261 | ||
262 | switch (con.op) { | |
263 | case ALG_OP_ENCRYPT: | |
264 | enc = 1; | |
265 | break; | |
266 | case ALG_OP_DECRYPT: | |
267 | enc = 0; | |
268 | break; | |
269 | default: | |
270 | return -EINVAL; | |
271 | } | |
272 | ||
273 | if (con.iv && con.iv->ivlen != ivsize) | |
274 | return -EINVAL; | |
275 | } | |
276 | ||
277 | err = -EINVAL; | |
278 | ||
279 | lock_sock(sk); | |
280 | if (!ctx->more && ctx->used) | |
281 | goto unlock; | |
282 | ||
283 | if (!ctx->used) { | |
284 | ctx->enc = enc; | |
285 | if (con.iv) | |
286 | memcpy(ctx->iv, con.iv->iv, ivsize); | |
287 | } | |
288 | ||
8ff59090 HX |
289 | while (size) { |
290 | struct scatterlist *sg; | |
291 | unsigned long len = size; | |
292 | int plen; | |
293 | ||
294 | if (ctx->merge) { | |
295 | sgl = list_entry(ctx->tsgl.prev, | |
296 | struct skcipher_sg_list, list); | |
297 | sg = sgl->sg + sgl->cur - 1; | |
298 | len = min_t(unsigned long, len, | |
299 | PAGE_SIZE - sg->offset - sg->length); | |
300 | ||
301 | err = memcpy_fromiovec(page_address(sg_page(sg)) + | |
302 | sg->offset + sg->length, | |
303 | msg->msg_iov, len); | |
304 | if (err) | |
305 | goto unlock; | |
306 | ||
307 | sg->length += len; | |
308 | ctx->merge = (sg->offset + sg->length) & | |
309 | (PAGE_SIZE - 1); | |
310 | ||
311 | ctx->used += len; | |
312 | copied += len; | |
313 | size -= len; | |
8ff59090 HX |
314 | continue; |
315 | } | |
316 | ||
0f6bb83c | 317 | if (!skcipher_writable(sk)) { |
8ff59090 HX |
318 | err = skcipher_wait_for_wmem(sk, msg->msg_flags); |
319 | if (err) | |
320 | goto unlock; | |
8ff59090 HX |
321 | } |
322 | ||
0f6bb83c | 323 | len = min_t(unsigned long, len, skcipher_sndbuf(sk)); |
8ff59090 HX |
324 | |
325 | err = skcipher_alloc_sgl(sk); | |
326 | if (err) | |
327 | goto unlock; | |
328 | ||
329 | sgl = list_entry(ctx->tsgl.prev, struct skcipher_sg_list, list); | |
330 | sg = sgl->sg; | |
331 | do { | |
332 | i = sgl->cur; | |
333 | plen = min_t(int, len, PAGE_SIZE); | |
334 | ||
335 | sg_assign_page(sg + i, alloc_page(GFP_KERNEL)); | |
336 | err = -ENOMEM; | |
337 | if (!sg_page(sg + i)) | |
338 | goto unlock; | |
339 | ||
340 | err = memcpy_fromiovec(page_address(sg_page(sg + i)), | |
341 | msg->msg_iov, plen); | |
342 | if (err) { | |
343 | __free_page(sg_page(sg + i)); | |
344 | sg_assign_page(sg + i, NULL); | |
345 | goto unlock; | |
346 | } | |
347 | ||
348 | sg[i].length = plen; | |
349 | len -= plen; | |
350 | ctx->used += plen; | |
351 | copied += plen; | |
352 | size -= plen; | |
8ff59090 HX |
353 | sgl->cur++; |
354 | } while (len && sgl->cur < MAX_SGL_ENTS); | |
355 | ||
356 | ctx->merge = plen & (PAGE_SIZE - 1); | |
357 | } | |
358 | ||
359 | err = 0; | |
360 | ||
361 | ctx->more = msg->msg_flags & MSG_MORE; | |
362 | if (!ctx->more && !list_empty(&ctx->tsgl)) | |
363 | sgl = list_entry(ctx->tsgl.prev, struct skcipher_sg_list, list); | |
364 | ||
365 | unlock: | |
366 | skcipher_data_wakeup(sk); | |
367 | release_sock(sk); | |
368 | ||
369 | return copied ?: err; | |
370 | } | |
371 | ||
372 | static ssize_t skcipher_sendpage(struct socket *sock, struct page *page, | |
373 | int offset, size_t size, int flags) | |
374 | { | |
375 | struct sock *sk = sock->sk; | |
376 | struct alg_sock *ask = alg_sk(sk); | |
377 | struct skcipher_ctx *ctx = ask->private; | |
378 | struct skcipher_sg_list *sgl; | |
379 | int err = -EINVAL; | |
8ff59090 HX |
380 | |
381 | lock_sock(sk); | |
382 | if (!ctx->more && ctx->used) | |
383 | goto unlock; | |
384 | ||
385 | if (!size) | |
386 | goto done; | |
387 | ||
0f6bb83c | 388 | if (!skcipher_writable(sk)) { |
8ff59090 HX |
389 | err = skcipher_wait_for_wmem(sk, flags); |
390 | if (err) | |
391 | goto unlock; | |
8ff59090 HX |
392 | } |
393 | ||
394 | err = skcipher_alloc_sgl(sk); | |
395 | if (err) | |
396 | goto unlock; | |
397 | ||
398 | ctx->merge = 0; | |
399 | sgl = list_entry(ctx->tsgl.prev, struct skcipher_sg_list, list); | |
400 | ||
401 | get_page(page); | |
402 | sg_set_page(sgl->sg + sgl->cur, page, size, offset); | |
403 | sgl->cur++; | |
404 | ctx->used += size; | |
405 | ||
406 | done: | |
407 | ctx->more = flags & MSG_MORE; | |
408 | if (!ctx->more && !list_empty(&ctx->tsgl)) | |
409 | sgl = list_entry(ctx->tsgl.prev, struct skcipher_sg_list, list); | |
410 | ||
411 | unlock: | |
412 | skcipher_data_wakeup(sk); | |
413 | release_sock(sk); | |
414 | ||
415 | return err ?: size; | |
416 | } | |
417 | ||
418 | static int skcipher_recvmsg(struct kiocb *unused, struct socket *sock, | |
419 | struct msghdr *msg, size_t ignored, int flags) | |
420 | { | |
421 | struct sock *sk = sock->sk; | |
422 | struct alg_sock *ask = alg_sk(sk); | |
423 | struct skcipher_ctx *ctx = ask->private; | |
424 | unsigned bs = crypto_ablkcipher_blocksize(crypto_ablkcipher_reqtfm( | |
425 | &ctx->req)); | |
426 | struct skcipher_sg_list *sgl; | |
427 | struct scatterlist *sg; | |
428 | unsigned long iovlen; | |
429 | struct iovec *iov; | |
430 | int err = -EAGAIN; | |
431 | int used; | |
432 | long copied = 0; | |
433 | ||
434 | lock_sock(sk); | |
72a763d8 | 435 | msg->msg_namelen = 0; |
8ff59090 HX |
436 | for (iov = msg->msg_iov, iovlen = msg->msg_iovlen; iovlen > 0; |
437 | iovlen--, iov++) { | |
438 | unsigned long seglen = iov->iov_len; | |
439 | char __user *from = iov->iov_base; | |
440 | ||
441 | while (seglen) { | |
442 | sgl = list_first_entry(&ctx->tsgl, | |
443 | struct skcipher_sg_list, list); | |
444 | sg = sgl->sg; | |
445 | ||
446 | while (!sg->length) | |
447 | sg++; | |
448 | ||
449 | used = ctx->used; | |
450 | if (!used) { | |
451 | err = skcipher_wait_for_data(sk, flags); | |
452 | if (err) | |
453 | goto unlock; | |
454 | } | |
455 | ||
456 | used = min_t(unsigned long, used, seglen); | |
457 | ||
bc97e57e HX |
458 | used = af_alg_make_sg(&ctx->rsgl, from, used, 1); |
459 | err = used; | |
460 | if (err < 0) | |
461 | goto unlock; | |
462 | ||
8ff59090 HX |
463 | if (ctx->more || used < ctx->used) |
464 | used -= used % bs; | |
465 | ||
466 | err = -EINVAL; | |
467 | if (!used) | |
bc97e57e | 468 | goto free; |
8ff59090 HX |
469 | |
470 | ablkcipher_request_set_crypt(&ctx->req, sg, | |
471 | ctx->rsgl.sg, used, | |
472 | ctx->iv); | |
473 | ||
474 | err = af_alg_wait_for_completion( | |
475 | ctx->enc ? | |
476 | crypto_ablkcipher_encrypt(&ctx->req) : | |
477 | crypto_ablkcipher_decrypt(&ctx->req), | |
478 | &ctx->completion); | |
479 | ||
bc97e57e | 480 | free: |
8ff59090 HX |
481 | af_alg_free_sg(&ctx->rsgl); |
482 | ||
483 | if (err) | |
484 | goto unlock; | |
485 | ||
486 | copied += used; | |
487 | from += used; | |
488 | seglen -= used; | |
489 | skcipher_pull_sgl(sk, used); | |
490 | } | |
491 | } | |
492 | ||
493 | err = 0; | |
494 | ||
495 | unlock: | |
496 | skcipher_wmem_wakeup(sk); | |
497 | release_sock(sk); | |
498 | ||
499 | return copied ?: err; | |
500 | } | |
501 | ||
502 | ||
503 | static unsigned int skcipher_poll(struct file *file, struct socket *sock, | |
504 | poll_table *wait) | |
505 | { | |
506 | struct sock *sk = sock->sk; | |
507 | struct alg_sock *ask = alg_sk(sk); | |
508 | struct skcipher_ctx *ctx = ask->private; | |
509 | unsigned int mask; | |
510 | ||
511 | sock_poll_wait(file, sk_sleep(sk), wait); | |
512 | mask = 0; | |
513 | ||
514 | if (ctx->used) | |
515 | mask |= POLLIN | POLLRDNORM; | |
516 | ||
517 | if (skcipher_writable(sk)) | |
518 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; | |
519 | ||
520 | return mask; | |
521 | } | |
522 | ||
523 | static struct proto_ops algif_skcipher_ops = { | |
524 | .family = PF_ALG, | |
525 | ||
526 | .connect = sock_no_connect, | |
527 | .socketpair = sock_no_socketpair, | |
528 | .getname = sock_no_getname, | |
529 | .ioctl = sock_no_ioctl, | |
530 | .listen = sock_no_listen, | |
531 | .shutdown = sock_no_shutdown, | |
532 | .getsockopt = sock_no_getsockopt, | |
533 | .mmap = sock_no_mmap, | |
534 | .bind = sock_no_bind, | |
535 | .accept = sock_no_accept, | |
536 | .setsockopt = sock_no_setsockopt, | |
537 | ||
538 | .release = af_alg_release, | |
539 | .sendmsg = skcipher_sendmsg, | |
540 | .sendpage = skcipher_sendpage, | |
541 | .recvmsg = skcipher_recvmsg, | |
542 | .poll = skcipher_poll, | |
543 | }; | |
544 | ||
545 | static void *skcipher_bind(const char *name, u32 type, u32 mask) | |
546 | { | |
547 | return crypto_alloc_ablkcipher(name, type, mask); | |
548 | } | |
549 | ||
550 | static void skcipher_release(void *private) | |
551 | { | |
552 | crypto_free_ablkcipher(private); | |
553 | } | |
554 | ||
555 | static int skcipher_setkey(void *private, const u8 *key, unsigned int keylen) | |
556 | { | |
557 | return crypto_ablkcipher_setkey(private, key, keylen); | |
558 | } | |
559 | ||
560 | static void skcipher_sock_destruct(struct sock *sk) | |
561 | { | |
562 | struct alg_sock *ask = alg_sk(sk); | |
563 | struct skcipher_ctx *ctx = ask->private; | |
564 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(&ctx->req); | |
565 | ||
566 | skcipher_free_sgl(sk); | |
567 | sock_kfree_s(sk, ctx->iv, crypto_ablkcipher_ivsize(tfm)); | |
568 | sock_kfree_s(sk, ctx, ctx->len); | |
569 | af_alg_release_parent(sk); | |
570 | } | |
571 | ||
572 | static int skcipher_accept_parent(void *private, struct sock *sk) | |
573 | { | |
574 | struct skcipher_ctx *ctx; | |
575 | struct alg_sock *ask = alg_sk(sk); | |
576 | unsigned int len = sizeof(*ctx) + crypto_ablkcipher_reqsize(private); | |
577 | ||
578 | ctx = sock_kmalloc(sk, len, GFP_KERNEL); | |
579 | if (!ctx) | |
580 | return -ENOMEM; | |
581 | ||
582 | ctx->iv = sock_kmalloc(sk, crypto_ablkcipher_ivsize(private), | |
583 | GFP_KERNEL); | |
584 | if (!ctx->iv) { | |
585 | sock_kfree_s(sk, ctx, len); | |
586 | return -ENOMEM; | |
587 | } | |
588 | ||
589 | memset(ctx->iv, 0, crypto_ablkcipher_ivsize(private)); | |
590 | ||
591 | INIT_LIST_HEAD(&ctx->tsgl); | |
592 | ctx->len = len; | |
593 | ctx->used = 0; | |
594 | ctx->more = 0; | |
595 | ctx->merge = 0; | |
596 | ctx->enc = 0; | |
597 | af_alg_init_completion(&ctx->completion); | |
598 | ||
599 | ask->private = ctx; | |
600 | ||
601 | ablkcipher_request_set_tfm(&ctx->req, private); | |
602 | ablkcipher_request_set_callback(&ctx->req, CRYPTO_TFM_REQ_MAY_BACKLOG, | |
603 | af_alg_complete, &ctx->completion); | |
604 | ||
605 | sk->sk_destruct = skcipher_sock_destruct; | |
606 | ||
607 | return 0; | |
608 | } | |
609 | ||
610 | static const struct af_alg_type algif_type_skcipher = { | |
611 | .bind = skcipher_bind, | |
612 | .release = skcipher_release, | |
613 | .setkey = skcipher_setkey, | |
614 | .accept = skcipher_accept_parent, | |
615 | .ops = &algif_skcipher_ops, | |
616 | .name = "skcipher", | |
617 | .owner = THIS_MODULE | |
618 | }; | |
619 | ||
620 | static int __init algif_skcipher_init(void) | |
621 | { | |
622 | return af_alg_register_type(&algif_type_skcipher); | |
623 | } | |
624 | ||
625 | static void __exit algif_skcipher_exit(void) | |
626 | { | |
627 | int err = af_alg_unregister_type(&algif_type_skcipher); | |
628 | BUG_ON(err); | |
629 | } | |
630 | ||
631 | module_init(algif_skcipher_init); | |
632 | module_exit(algif_skcipher_exit); | |
633 | MODULE_LICENSE("GPL"); |