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Commit | Line | Data |
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a38f7907 SK |
1 | /* |
2 | * Crypto user configuration API. | |
3 | * | |
4 | * Copyright (C) 2011 secunet Security Networks AG | |
5 | * Copyright (C) 2011 Steffen Klassert <steffen.klassert@secunet.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms and conditions of the GNU General Public License, | |
9 | * version 2, as published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope it will be useful, but WITHOUT | |
12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
14 | * more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along with | |
17 | * this program; if not, write to the Free Software Foundation, Inc., | |
18 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
19 | */ | |
20 | ||
21 | #include <linux/module.h> | |
22 | #include <linux/crypto.h> | |
23 | #include <linux/cryptouser.h> | |
1e122994 | 24 | #include <linux/sched.h> |
a38f7907 SK |
25 | #include <net/netlink.h> |
26 | #include <linux/security.h> | |
27 | #include <net/net_namespace.h> | |
1e122994 SK |
28 | #include <crypto/internal/aead.h> |
29 | #include <crypto/internal/skcipher.h> | |
30 | ||
a38f7907 SK |
31 | #include "internal.h" |
32 | ||
8fd61d34 MK |
33 | #define null_terminated(x) (strnlen(x, sizeof(x)) < sizeof(x)) |
34 | ||
66ce0b0f | 35 | static DEFINE_MUTEX(crypto_cfg_mutex); |
a38f7907 SK |
36 | |
37 | /* The crypto netlink socket */ | |
38 | static struct sock *crypto_nlsk; | |
39 | ||
40 | struct crypto_dump_info { | |
41 | struct sk_buff *in_skb; | |
42 | struct sk_buff *out_skb; | |
43 | u32 nlmsg_seq; | |
44 | u16 nlmsg_flags; | |
45 | }; | |
46 | ||
47 | static struct crypto_alg *crypto_alg_match(struct crypto_user_alg *p, int exact) | |
48 | { | |
a38f7907 SK |
49 | struct crypto_alg *q, *alg = NULL; |
50 | ||
51 | down_read(&crypto_alg_sem); | |
52 | ||
a38f7907 | 53 | list_for_each_entry(q, &crypto_alg_list, cra_list) { |
e6ea64ec | 54 | int match = 0; |
a38f7907 SK |
55 | |
56 | if ((q->cra_flags ^ p->cru_type) & p->cru_mask) | |
57 | continue; | |
58 | ||
59 | if (strlen(p->cru_driver_name)) | |
60 | match = !strcmp(q->cra_driver_name, | |
61 | p->cru_driver_name); | |
62 | else if (!exact) | |
63 | match = !strcmp(q->cra_name, p->cru_name); | |
64 | ||
016baaa1 HX |
65 | if (!match) |
66 | continue; | |
67 | ||
68 | if (unlikely(!crypto_mod_get(q))) | |
69 | continue; | |
70 | ||
71 | alg = q; | |
72 | break; | |
a38f7907 SK |
73 | } |
74 | ||
75 | up_read(&crypto_alg_sem); | |
76 | ||
77 | return alg; | |
78 | } | |
79 | ||
07a5fa4a SK |
80 | static int crypto_report_cipher(struct sk_buff *skb, struct crypto_alg *alg) |
81 | { | |
82 | struct crypto_report_cipher rcipher; | |
83 | ||
9a5467bf | 84 | strncpy(rcipher.type, "cipher", sizeof(rcipher.type)); |
07a5fa4a SK |
85 | |
86 | rcipher.blocksize = alg->cra_blocksize; | |
87 | rcipher.min_keysize = alg->cra_cipher.cia_min_keysize; | |
88 | rcipher.max_keysize = alg->cra_cipher.cia_max_keysize; | |
89 | ||
6662df33 DM |
90 | if (nla_put(skb, CRYPTOCFGA_REPORT_CIPHER, |
91 | sizeof(struct crypto_report_cipher), &rcipher)) | |
92 | goto nla_put_failure; | |
07a5fa4a SK |
93 | return 0; |
94 | ||
95 | nla_put_failure: | |
96 | return -EMSGSIZE; | |
97 | } | |
98 | ||
540b97c1 SK |
99 | static int crypto_report_comp(struct sk_buff *skb, struct crypto_alg *alg) |
100 | { | |
101 | struct crypto_report_comp rcomp; | |
102 | ||
9a5467bf | 103 | strncpy(rcomp.type, "compression", sizeof(rcomp.type)); |
6662df33 DM |
104 | if (nla_put(skb, CRYPTOCFGA_REPORT_COMPRESS, |
105 | sizeof(struct crypto_report_comp), &rcomp)) | |
106 | goto nla_put_failure; | |
540b97c1 SK |
107 | return 0; |
108 | ||
109 | nla_put_failure: | |
110 | return -EMSGSIZE; | |
111 | } | |
112 | ||
a38f7907 SK |
113 | static int crypto_report_one(struct crypto_alg *alg, |
114 | struct crypto_user_alg *ualg, struct sk_buff *skb) | |
115 | { | |
9a5467bf MK |
116 | strncpy(ualg->cru_name, alg->cra_name, sizeof(ualg->cru_name)); |
117 | strncpy(ualg->cru_driver_name, alg->cra_driver_name, | |
118 | sizeof(ualg->cru_driver_name)); | |
119 | strncpy(ualg->cru_module_name, module_name(alg->cra_module), | |
120 | sizeof(ualg->cru_module_name)); | |
121 | ||
122 | ualg->cru_type = 0; | |
123 | ualg->cru_mask = 0; | |
a38f7907 SK |
124 | ualg->cru_flags = alg->cra_flags; |
125 | ualg->cru_refcnt = atomic_read(&alg->cra_refcnt); | |
126 | ||
6662df33 DM |
127 | if (nla_put_u32(skb, CRYPTOCFGA_PRIORITY_VAL, alg->cra_priority)) |
128 | goto nla_put_failure; | |
6c5a86f5 SK |
129 | if (alg->cra_flags & CRYPTO_ALG_LARVAL) { |
130 | struct crypto_report_larval rl; | |
131 | ||
9a5467bf | 132 | strncpy(rl.type, "larval", sizeof(rl.type)); |
6662df33 DM |
133 | if (nla_put(skb, CRYPTOCFGA_REPORT_LARVAL, |
134 | sizeof(struct crypto_report_larval), &rl)) | |
135 | goto nla_put_failure; | |
6c5a86f5 SK |
136 | goto out; |
137 | } | |
138 | ||
b6aa63c0 SK |
139 | if (alg->cra_type && alg->cra_type->report) { |
140 | if (alg->cra_type->report(skb, alg)) | |
141 | goto nla_put_failure; | |
07a5fa4a SK |
142 | |
143 | goto out; | |
144 | } | |
145 | ||
146 | switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) { | |
147 | case CRYPTO_ALG_TYPE_CIPHER: | |
148 | if (crypto_report_cipher(skb, alg)) | |
149 | goto nla_put_failure; | |
150 | ||
540b97c1 SK |
151 | break; |
152 | case CRYPTO_ALG_TYPE_COMPRESS: | |
153 | if (crypto_report_comp(skb, alg)) | |
154 | goto nla_put_failure; | |
155 | ||
07a5fa4a | 156 | break; |
b6aa63c0 SK |
157 | } |
158 | ||
6c5a86f5 | 159 | out: |
a38f7907 SK |
160 | return 0; |
161 | ||
162 | nla_put_failure: | |
163 | return -EMSGSIZE; | |
164 | } | |
165 | ||
166 | static int crypto_report_alg(struct crypto_alg *alg, | |
167 | struct crypto_dump_info *info) | |
168 | { | |
169 | struct sk_buff *in_skb = info->in_skb; | |
170 | struct sk_buff *skb = info->out_skb; | |
171 | struct nlmsghdr *nlh; | |
172 | struct crypto_user_alg *ualg; | |
173 | int err = 0; | |
174 | ||
15e47304 | 175 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, info->nlmsg_seq, |
a38f7907 SK |
176 | CRYPTO_MSG_GETALG, sizeof(*ualg), info->nlmsg_flags); |
177 | if (!nlh) { | |
178 | err = -EMSGSIZE; | |
179 | goto out; | |
180 | } | |
181 | ||
182 | ualg = nlmsg_data(nlh); | |
183 | ||
184 | err = crypto_report_one(alg, ualg, skb); | |
185 | if (err) { | |
186 | nlmsg_cancel(skb, nlh); | |
187 | goto out; | |
188 | } | |
189 | ||
190 | nlmsg_end(skb, nlh); | |
191 | ||
192 | out: | |
193 | return err; | |
194 | } | |
195 | ||
196 | static int crypto_report(struct sk_buff *in_skb, struct nlmsghdr *in_nlh, | |
197 | struct nlattr **attrs) | |
198 | { | |
199 | struct crypto_user_alg *p = nlmsg_data(in_nlh); | |
200 | struct crypto_alg *alg; | |
201 | struct sk_buff *skb; | |
202 | struct crypto_dump_info info; | |
203 | int err; | |
204 | ||
8fd61d34 MK |
205 | if (!null_terminated(p->cru_name) || !null_terminated(p->cru_driver_name)) |
206 | return -EINVAL; | |
207 | ||
5d4a5e77 | 208 | alg = crypto_alg_match(p, 0); |
a38f7907 SK |
209 | if (!alg) |
210 | return -ENOENT; | |
211 | ||
016baaa1 | 212 | err = -ENOMEM; |
a38f7907 SK |
213 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
214 | if (!skb) | |
016baaa1 | 215 | goto drop_alg; |
a38f7907 SK |
216 | |
217 | info.in_skb = in_skb; | |
218 | info.out_skb = skb; | |
219 | info.nlmsg_seq = in_nlh->nlmsg_seq; | |
220 | info.nlmsg_flags = 0; | |
221 | ||
222 | err = crypto_report_alg(alg, &info); | |
016baaa1 HX |
223 | |
224 | drop_alg: | |
225 | crypto_mod_put(alg); | |
226 | ||
a38f7907 SK |
227 | if (err) |
228 | return err; | |
229 | ||
15e47304 | 230 | return nlmsg_unicast(crypto_nlsk, skb, NETLINK_CB(in_skb).portid); |
a38f7907 SK |
231 | } |
232 | ||
233 | static int crypto_dump_report(struct sk_buff *skb, struct netlink_callback *cb) | |
234 | { | |
235 | struct crypto_alg *alg; | |
236 | struct crypto_dump_info info; | |
237 | int err; | |
238 | ||
239 | if (cb->args[0]) | |
240 | goto out; | |
241 | ||
242 | cb->args[0] = 1; | |
243 | ||
244 | info.in_skb = cb->skb; | |
245 | info.out_skb = skb; | |
246 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
247 | info.nlmsg_flags = NLM_F_MULTI; | |
248 | ||
249 | list_for_each_entry(alg, &crypto_alg_list, cra_list) { | |
250 | err = crypto_report_alg(alg, &info); | |
251 | if (err) | |
252 | goto out_err; | |
253 | } | |
254 | ||
255 | out: | |
256 | return skb->len; | |
257 | out_err: | |
258 | return err; | |
259 | } | |
260 | ||
261 | static int crypto_dump_report_done(struct netlink_callback *cb) | |
262 | { | |
263 | return 0; | |
264 | } | |
265 | ||
266 | static int crypto_update_alg(struct sk_buff *skb, struct nlmsghdr *nlh, | |
267 | struct nlattr **attrs) | |
268 | { | |
269 | struct crypto_alg *alg; | |
270 | struct crypto_user_alg *p = nlmsg_data(nlh); | |
271 | struct nlattr *priority = attrs[CRYPTOCFGA_PRIORITY_VAL]; | |
272 | LIST_HEAD(list); | |
273 | ||
639b4ac6 | 274 | if (!netlink_capable(skb, CAP_NET_ADMIN)) |
c568398a MCO |
275 | return -EPERM; |
276 | ||
8fd61d34 MK |
277 | if (!null_terminated(p->cru_name) || !null_terminated(p->cru_driver_name)) |
278 | return -EINVAL; | |
279 | ||
a38f7907 SK |
280 | if (priority && !strlen(p->cru_driver_name)) |
281 | return -EINVAL; | |
282 | ||
283 | alg = crypto_alg_match(p, 1); | |
284 | if (!alg) | |
285 | return -ENOENT; | |
286 | ||
287 | down_write(&crypto_alg_sem); | |
288 | ||
289 | crypto_remove_spawns(alg, &list, NULL); | |
290 | ||
291 | if (priority) | |
292 | alg->cra_priority = nla_get_u32(priority); | |
293 | ||
294 | up_write(&crypto_alg_sem); | |
295 | ||
016baaa1 | 296 | crypto_mod_put(alg); |
a38f7907 SK |
297 | crypto_remove_final(&list); |
298 | ||
299 | return 0; | |
300 | } | |
301 | ||
302 | static int crypto_del_alg(struct sk_buff *skb, struct nlmsghdr *nlh, | |
303 | struct nlattr **attrs) | |
304 | { | |
305 | struct crypto_alg *alg; | |
306 | struct crypto_user_alg *p = nlmsg_data(nlh); | |
016baaa1 | 307 | int err; |
a38f7907 | 308 | |
639b4ac6 | 309 | if (!netlink_capable(skb, CAP_NET_ADMIN)) |
c568398a MCO |
310 | return -EPERM; |
311 | ||
8fd61d34 MK |
312 | if (!null_terminated(p->cru_name) || !null_terminated(p->cru_driver_name)) |
313 | return -EINVAL; | |
314 | ||
a38f7907 SK |
315 | alg = crypto_alg_match(p, 1); |
316 | if (!alg) | |
317 | return -ENOENT; | |
318 | ||
319 | /* We can not unregister core algorithms such as aes-generic. | |
320 | * We would loose the reference in the crypto_alg_list to this algorithm | |
321 | * if we try to unregister. Unregistering such an algorithm without | |
322 | * removing the module is not possible, so we restrict to crypto | |
323 | * instances that are build from templates. */ | |
016baaa1 | 324 | err = -EINVAL; |
a38f7907 | 325 | if (!(alg->cra_flags & CRYPTO_ALG_INSTANCE)) |
016baaa1 | 326 | goto drop_alg; |
a38f7907 | 327 | |
016baaa1 HX |
328 | err = -EBUSY; |
329 | if (atomic_read(&alg->cra_refcnt) > 2) | |
330 | goto drop_alg; | |
a38f7907 | 331 | |
016baaa1 HX |
332 | err = crypto_unregister_instance((struct crypto_instance *)alg); |
333 | ||
334 | drop_alg: | |
335 | crypto_mod_put(alg); | |
336 | return err; | |
a38f7907 SK |
337 | } |
338 | ||
1e122994 SK |
339 | static struct crypto_alg *crypto_user_skcipher_alg(const char *name, u32 type, |
340 | u32 mask) | |
341 | { | |
342 | int err; | |
343 | struct crypto_alg *alg; | |
344 | ||
345 | type = crypto_skcipher_type(type); | |
346 | mask = crypto_skcipher_mask(mask); | |
347 | ||
348 | for (;;) { | |
349 | alg = crypto_lookup_skcipher(name, type, mask); | |
350 | if (!IS_ERR(alg)) | |
351 | return alg; | |
352 | ||
353 | err = PTR_ERR(alg); | |
354 | if (err != -EAGAIN) | |
355 | break; | |
356 | if (signal_pending(current)) { | |
357 | err = -EINTR; | |
358 | break; | |
359 | } | |
360 | } | |
361 | ||
362 | return ERR_PTR(err); | |
363 | } | |
364 | ||
365 | static struct crypto_alg *crypto_user_aead_alg(const char *name, u32 type, | |
366 | u32 mask) | |
367 | { | |
368 | int err; | |
369 | struct crypto_alg *alg; | |
370 | ||
371 | type &= ~(CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_GENIV); | |
372 | type |= CRYPTO_ALG_TYPE_AEAD; | |
373 | mask &= ~(CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_GENIV); | |
374 | mask |= CRYPTO_ALG_TYPE_MASK; | |
375 | ||
376 | for (;;) { | |
377 | alg = crypto_lookup_aead(name, type, mask); | |
378 | if (!IS_ERR(alg)) | |
379 | return alg; | |
380 | ||
381 | err = PTR_ERR(alg); | |
382 | if (err != -EAGAIN) | |
383 | break; | |
384 | if (signal_pending(current)) { | |
385 | err = -EINTR; | |
386 | break; | |
387 | } | |
388 | } | |
389 | ||
390 | return ERR_PTR(err); | |
391 | } | |
392 | ||
a38f7907 SK |
393 | static int crypto_add_alg(struct sk_buff *skb, struct nlmsghdr *nlh, |
394 | struct nlattr **attrs) | |
395 | { | |
0cfdec7a | 396 | int exact = 0; |
a38f7907 SK |
397 | const char *name; |
398 | struct crypto_alg *alg; | |
399 | struct crypto_user_alg *p = nlmsg_data(nlh); | |
400 | struct nlattr *priority = attrs[CRYPTOCFGA_PRIORITY_VAL]; | |
401 | ||
639b4ac6 | 402 | if (!netlink_capable(skb, CAP_NET_ADMIN)) |
c568398a MCO |
403 | return -EPERM; |
404 | ||
8fd61d34 MK |
405 | if (!null_terminated(p->cru_name) || !null_terminated(p->cru_driver_name)) |
406 | return -EINVAL; | |
407 | ||
a38f7907 SK |
408 | if (strlen(p->cru_driver_name)) |
409 | exact = 1; | |
410 | ||
411 | if (priority && !exact) | |
412 | return -EINVAL; | |
413 | ||
414 | alg = crypto_alg_match(p, exact); | |
016baaa1 HX |
415 | if (alg) { |
416 | crypto_mod_put(alg); | |
a38f7907 | 417 | return -EEXIST; |
016baaa1 | 418 | } |
a38f7907 SK |
419 | |
420 | if (strlen(p->cru_driver_name)) | |
421 | name = p->cru_driver_name; | |
422 | else | |
423 | name = p->cru_name; | |
424 | ||
1e122994 SK |
425 | switch (p->cru_type & p->cru_mask & CRYPTO_ALG_TYPE_MASK) { |
426 | case CRYPTO_ALG_TYPE_AEAD: | |
427 | alg = crypto_user_aead_alg(name, p->cru_type, p->cru_mask); | |
428 | break; | |
429 | case CRYPTO_ALG_TYPE_GIVCIPHER: | |
430 | case CRYPTO_ALG_TYPE_BLKCIPHER: | |
431 | case CRYPTO_ALG_TYPE_ABLKCIPHER: | |
432 | alg = crypto_user_skcipher_alg(name, p->cru_type, p->cru_mask); | |
433 | break; | |
434 | default: | |
435 | alg = crypto_alg_mod_lookup(name, p->cru_type, p->cru_mask); | |
436 | } | |
437 | ||
a38f7907 SK |
438 | if (IS_ERR(alg)) |
439 | return PTR_ERR(alg); | |
440 | ||
441 | down_write(&crypto_alg_sem); | |
442 | ||
443 | if (priority) | |
444 | alg->cra_priority = nla_get_u32(priority); | |
445 | ||
446 | up_write(&crypto_alg_sem); | |
447 | ||
448 | crypto_mod_put(alg); | |
449 | ||
450 | return 0; | |
451 | } | |
452 | ||
453 | #define MSGSIZE(type) sizeof(struct type) | |
454 | ||
455 | static const int crypto_msg_min[CRYPTO_NR_MSGTYPES] = { | |
456 | [CRYPTO_MSG_NEWALG - CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg), | |
457 | [CRYPTO_MSG_DELALG - CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg), | |
458 | [CRYPTO_MSG_UPDATEALG - CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg), | |
459 | [CRYPTO_MSG_GETALG - CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg), | |
460 | }; | |
461 | ||
462 | static const struct nla_policy crypto_policy[CRYPTOCFGA_MAX+1] = { | |
463 | [CRYPTOCFGA_PRIORITY_VAL] = { .type = NLA_U32}, | |
464 | }; | |
465 | ||
466 | #undef MSGSIZE | |
467 | ||
a84fb791 | 468 | static const struct crypto_link { |
a38f7907 SK |
469 | int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **); |
470 | int (*dump)(struct sk_buff *, struct netlink_callback *); | |
471 | int (*done)(struct netlink_callback *); | |
472 | } crypto_dispatch[CRYPTO_NR_MSGTYPES] = { | |
473 | [CRYPTO_MSG_NEWALG - CRYPTO_MSG_BASE] = { .doit = crypto_add_alg}, | |
474 | [CRYPTO_MSG_DELALG - CRYPTO_MSG_BASE] = { .doit = crypto_del_alg}, | |
475 | [CRYPTO_MSG_UPDATEALG - CRYPTO_MSG_BASE] = { .doit = crypto_update_alg}, | |
476 | [CRYPTO_MSG_GETALG - CRYPTO_MSG_BASE] = { .doit = crypto_report, | |
477 | .dump = crypto_dump_report, | |
478 | .done = crypto_dump_report_done}, | |
479 | }; | |
480 | ||
481 | static int crypto_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) | |
482 | { | |
483 | struct nlattr *attrs[CRYPTOCFGA_MAX+1]; | |
a84fb791 | 484 | const struct crypto_link *link; |
a38f7907 SK |
485 | int type, err; |
486 | ||
487 | type = nlh->nlmsg_type; | |
488 | if (type > CRYPTO_MSG_MAX) | |
489 | return -EINVAL; | |
490 | ||
491 | type -= CRYPTO_MSG_BASE; | |
492 | link = &crypto_dispatch[type]; | |
493 | ||
a38f7907 SK |
494 | if ((type == (CRYPTO_MSG_GETALG - CRYPTO_MSG_BASE) && |
495 | (nlh->nlmsg_flags & NLM_F_DUMP))) { | |
5219a534 SK |
496 | struct crypto_alg *alg; |
497 | u16 dump_alloc = 0; | |
498 | ||
a38f7907 SK |
499 | if (link->dump == NULL) |
500 | return -EINVAL; | |
5219a534 SK |
501 | |
502 | list_for_each_entry(alg, &crypto_alg_list, cra_list) | |
503 | dump_alloc += CRYPTO_REPORT_MAXSIZE; | |
504 | ||
80d326fa PNA |
505 | { |
506 | struct netlink_dump_control c = { | |
507 | .dump = link->dump, | |
508 | .done = link->done, | |
5219a534 | 509 | .min_dump_alloc = dump_alloc, |
80d326fa PNA |
510 | }; |
511 | return netlink_dump_start(crypto_nlsk, skb, nlh, &c); | |
512 | } | |
a38f7907 SK |
513 | } |
514 | ||
515 | err = nlmsg_parse(nlh, crypto_msg_min[type], attrs, CRYPTOCFGA_MAX, | |
516 | crypto_policy); | |
517 | if (err < 0) | |
518 | return err; | |
519 | ||
520 | if (link->doit == NULL) | |
521 | return -EINVAL; | |
522 | ||
523 | return link->doit(skb, nlh, attrs); | |
524 | } | |
525 | ||
526 | static void crypto_netlink_rcv(struct sk_buff *skb) | |
527 | { | |
528 | mutex_lock(&crypto_cfg_mutex); | |
529 | netlink_rcv_skb(skb, &crypto_user_rcv_msg); | |
530 | mutex_unlock(&crypto_cfg_mutex); | |
531 | } | |
532 | ||
533 | static int __init crypto_user_init(void) | |
534 | { | |
a31f2d17 PNA |
535 | struct netlink_kernel_cfg cfg = { |
536 | .input = crypto_netlink_rcv, | |
537 | }; | |
538 | ||
9f00d977 | 539 | crypto_nlsk = netlink_kernel_create(&init_net, NETLINK_CRYPTO, &cfg); |
a38f7907 SK |
540 | if (!crypto_nlsk) |
541 | return -ENOMEM; | |
542 | ||
543 | return 0; | |
544 | } | |
545 | ||
546 | static void __exit crypto_user_exit(void) | |
547 | { | |
548 | netlink_kernel_release(crypto_nlsk); | |
549 | } | |
550 | ||
551 | module_init(crypto_user_init); | |
552 | module_exit(crypto_user_exit); | |
553 | MODULE_LICENSE("GPL"); | |
554 | MODULE_AUTHOR("Steffen Klassert <steffen.klassert@secunet.com>"); | |
555 | MODULE_DESCRIPTION("Crypto userspace configuration API"); | |
476c7fe2 | 556 | MODULE_ALIAS("net-pf-16-proto-21"); |