Commit | Line | Data |
---|---|---|
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 | 28 | #include <crypto/internal/skcipher.h> |
9aa867e4 | 29 | #include <crypto/internal/rng.h> |
3c339ab8 | 30 | #include <crypto/akcipher.h> |
1e122994 | 31 | |
a38f7907 SK |
32 | #include "internal.h" |
33 | ||
8fd61d34 MK |
34 | #define null_terminated(x) (strnlen(x, sizeof(x)) < sizeof(x)) |
35 | ||
66ce0b0f | 36 | static DEFINE_MUTEX(crypto_cfg_mutex); |
a38f7907 SK |
37 | |
38 | /* The crypto netlink socket */ | |
39 | static struct sock *crypto_nlsk; | |
40 | ||
41 | struct crypto_dump_info { | |
42 | struct sk_buff *in_skb; | |
43 | struct sk_buff *out_skb; | |
44 | u32 nlmsg_seq; | |
45 | u16 nlmsg_flags; | |
46 | }; | |
47 | ||
48 | static struct crypto_alg *crypto_alg_match(struct crypto_user_alg *p, int exact) | |
49 | { | |
a38f7907 SK |
50 | struct crypto_alg *q, *alg = NULL; |
51 | ||
52 | down_read(&crypto_alg_sem); | |
53 | ||
a38f7907 | 54 | list_for_each_entry(q, &crypto_alg_list, cra_list) { |
e6ea64ec | 55 | int match = 0; |
a38f7907 SK |
56 | |
57 | if ((q->cra_flags ^ p->cru_type) & p->cru_mask) | |
58 | continue; | |
59 | ||
60 | if (strlen(p->cru_driver_name)) | |
61 | match = !strcmp(q->cra_driver_name, | |
62 | p->cru_driver_name); | |
63 | else if (!exact) | |
64 | match = !strcmp(q->cra_name, p->cru_name); | |
65 | ||
016baaa1 HX |
66 | if (!match) |
67 | continue; | |
68 | ||
69 | if (unlikely(!crypto_mod_get(q))) | |
70 | continue; | |
71 | ||
72 | alg = q; | |
73 | break; | |
a38f7907 SK |
74 | } |
75 | ||
76 | up_read(&crypto_alg_sem); | |
77 | ||
78 | return alg; | |
79 | } | |
80 | ||
07a5fa4a SK |
81 | static int crypto_report_cipher(struct sk_buff *skb, struct crypto_alg *alg) |
82 | { | |
83 | struct crypto_report_cipher rcipher; | |
84 | ||
9a5467bf | 85 | strncpy(rcipher.type, "cipher", sizeof(rcipher.type)); |
07a5fa4a SK |
86 | |
87 | rcipher.blocksize = alg->cra_blocksize; | |
88 | rcipher.min_keysize = alg->cra_cipher.cia_min_keysize; | |
89 | rcipher.max_keysize = alg->cra_cipher.cia_max_keysize; | |
90 | ||
6662df33 DM |
91 | if (nla_put(skb, CRYPTOCFGA_REPORT_CIPHER, |
92 | sizeof(struct crypto_report_cipher), &rcipher)) | |
93 | goto nla_put_failure; | |
07a5fa4a SK |
94 | return 0; |
95 | ||
96 | nla_put_failure: | |
97 | return -EMSGSIZE; | |
98 | } | |
99 | ||
540b97c1 SK |
100 | static int crypto_report_comp(struct sk_buff *skb, struct crypto_alg *alg) |
101 | { | |
102 | struct crypto_report_comp rcomp; | |
103 | ||
9a5467bf | 104 | strncpy(rcomp.type, "compression", sizeof(rcomp.type)); |
6662df33 DM |
105 | if (nla_put(skb, CRYPTOCFGA_REPORT_COMPRESS, |
106 | sizeof(struct crypto_report_comp), &rcomp)) | |
107 | goto nla_put_failure; | |
540b97c1 SK |
108 | return 0; |
109 | ||
110 | nla_put_failure: | |
111 | return -EMSGSIZE; | |
112 | } | |
113 | ||
3c339ab8 TS |
114 | static int crypto_report_akcipher(struct sk_buff *skb, struct crypto_alg *alg) |
115 | { | |
116 | struct crypto_report_akcipher rakcipher; | |
117 | ||
118 | strncpy(rakcipher.type, "akcipher", sizeof(rakcipher.type)); | |
119 | ||
120 | if (nla_put(skb, CRYPTOCFGA_REPORT_AKCIPHER, | |
121 | sizeof(struct crypto_report_akcipher), &rakcipher)) | |
122 | goto nla_put_failure; | |
123 | return 0; | |
124 | ||
125 | nla_put_failure: | |
126 | return -EMSGSIZE; | |
127 | } | |
128 | ||
a38f7907 SK |
129 | static int crypto_report_one(struct crypto_alg *alg, |
130 | struct crypto_user_alg *ualg, struct sk_buff *skb) | |
131 | { | |
9a5467bf MK |
132 | strncpy(ualg->cru_name, alg->cra_name, sizeof(ualg->cru_name)); |
133 | strncpy(ualg->cru_driver_name, alg->cra_driver_name, | |
134 | sizeof(ualg->cru_driver_name)); | |
135 | strncpy(ualg->cru_module_name, module_name(alg->cra_module), | |
136 | sizeof(ualg->cru_module_name)); | |
137 | ||
138 | ualg->cru_type = 0; | |
139 | ualg->cru_mask = 0; | |
a38f7907 SK |
140 | ualg->cru_flags = alg->cra_flags; |
141 | ualg->cru_refcnt = atomic_read(&alg->cra_refcnt); | |
142 | ||
6662df33 DM |
143 | if (nla_put_u32(skb, CRYPTOCFGA_PRIORITY_VAL, alg->cra_priority)) |
144 | goto nla_put_failure; | |
6c5a86f5 SK |
145 | if (alg->cra_flags & CRYPTO_ALG_LARVAL) { |
146 | struct crypto_report_larval rl; | |
147 | ||
9a5467bf | 148 | strncpy(rl.type, "larval", sizeof(rl.type)); |
6662df33 DM |
149 | if (nla_put(skb, CRYPTOCFGA_REPORT_LARVAL, |
150 | sizeof(struct crypto_report_larval), &rl)) | |
151 | goto nla_put_failure; | |
6c5a86f5 SK |
152 | goto out; |
153 | } | |
154 | ||
b6aa63c0 SK |
155 | if (alg->cra_type && alg->cra_type->report) { |
156 | if (alg->cra_type->report(skb, alg)) | |
157 | goto nla_put_failure; | |
07a5fa4a SK |
158 | |
159 | goto out; | |
160 | } | |
161 | ||
162 | switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) { | |
163 | case CRYPTO_ALG_TYPE_CIPHER: | |
164 | if (crypto_report_cipher(skb, alg)) | |
165 | goto nla_put_failure; | |
166 | ||
540b97c1 SK |
167 | break; |
168 | case CRYPTO_ALG_TYPE_COMPRESS: | |
169 | if (crypto_report_comp(skb, alg)) | |
170 | goto nla_put_failure; | |
171 | ||
07a5fa4a | 172 | break; |
3c339ab8 TS |
173 | |
174 | case CRYPTO_ALG_TYPE_AKCIPHER: | |
175 | if (crypto_report_akcipher(skb, alg)) | |
176 | goto nla_put_failure; | |
177 | ||
178 | break; | |
b6aa63c0 SK |
179 | } |
180 | ||
6c5a86f5 | 181 | out: |
a38f7907 SK |
182 | return 0; |
183 | ||
184 | nla_put_failure: | |
185 | return -EMSGSIZE; | |
186 | } | |
187 | ||
188 | static int crypto_report_alg(struct crypto_alg *alg, | |
189 | struct crypto_dump_info *info) | |
190 | { | |
191 | struct sk_buff *in_skb = info->in_skb; | |
192 | struct sk_buff *skb = info->out_skb; | |
193 | struct nlmsghdr *nlh; | |
194 | struct crypto_user_alg *ualg; | |
195 | int err = 0; | |
196 | ||
15e47304 | 197 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, info->nlmsg_seq, |
a38f7907 SK |
198 | CRYPTO_MSG_GETALG, sizeof(*ualg), info->nlmsg_flags); |
199 | if (!nlh) { | |
200 | err = -EMSGSIZE; | |
201 | goto out; | |
202 | } | |
203 | ||
204 | ualg = nlmsg_data(nlh); | |
205 | ||
206 | err = crypto_report_one(alg, ualg, skb); | |
207 | if (err) { | |
208 | nlmsg_cancel(skb, nlh); | |
209 | goto out; | |
210 | } | |
211 | ||
212 | nlmsg_end(skb, nlh); | |
213 | ||
214 | out: | |
215 | return err; | |
216 | } | |
217 | ||
218 | static int crypto_report(struct sk_buff *in_skb, struct nlmsghdr *in_nlh, | |
219 | struct nlattr **attrs) | |
220 | { | |
221 | struct crypto_user_alg *p = nlmsg_data(in_nlh); | |
222 | struct crypto_alg *alg; | |
223 | struct sk_buff *skb; | |
224 | struct crypto_dump_info info; | |
225 | int err; | |
226 | ||
8fd61d34 MK |
227 | if (!null_terminated(p->cru_name) || !null_terminated(p->cru_driver_name)) |
228 | return -EINVAL; | |
229 | ||
5d4a5e77 | 230 | alg = crypto_alg_match(p, 0); |
a38f7907 SK |
231 | if (!alg) |
232 | return -ENOENT; | |
233 | ||
016baaa1 | 234 | err = -ENOMEM; |
a38f7907 SK |
235 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
236 | if (!skb) | |
016baaa1 | 237 | goto drop_alg; |
a38f7907 SK |
238 | |
239 | info.in_skb = in_skb; | |
240 | info.out_skb = skb; | |
241 | info.nlmsg_seq = in_nlh->nlmsg_seq; | |
242 | info.nlmsg_flags = 0; | |
243 | ||
244 | err = crypto_report_alg(alg, &info); | |
016baaa1 HX |
245 | |
246 | drop_alg: | |
247 | crypto_mod_put(alg); | |
248 | ||
a38f7907 SK |
249 | if (err) |
250 | return err; | |
251 | ||
15e47304 | 252 | return nlmsg_unicast(crypto_nlsk, skb, NETLINK_CB(in_skb).portid); |
a38f7907 SK |
253 | } |
254 | ||
255 | static int crypto_dump_report(struct sk_buff *skb, struct netlink_callback *cb) | |
256 | { | |
257 | struct crypto_alg *alg; | |
258 | struct crypto_dump_info info; | |
259 | int err; | |
260 | ||
261 | if (cb->args[0]) | |
262 | goto out; | |
263 | ||
264 | cb->args[0] = 1; | |
265 | ||
266 | info.in_skb = cb->skb; | |
267 | info.out_skb = skb; | |
268 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
269 | info.nlmsg_flags = NLM_F_MULTI; | |
270 | ||
271 | list_for_each_entry(alg, &crypto_alg_list, cra_list) { | |
272 | err = crypto_report_alg(alg, &info); | |
273 | if (err) | |
274 | goto out_err; | |
275 | } | |
276 | ||
277 | out: | |
278 | return skb->len; | |
279 | out_err: | |
280 | return err; | |
281 | } | |
282 | ||
283 | static int crypto_dump_report_done(struct netlink_callback *cb) | |
284 | { | |
285 | return 0; | |
286 | } | |
287 | ||
288 | static int crypto_update_alg(struct sk_buff *skb, struct nlmsghdr *nlh, | |
289 | struct nlattr **attrs) | |
290 | { | |
291 | struct crypto_alg *alg; | |
292 | struct crypto_user_alg *p = nlmsg_data(nlh); | |
293 | struct nlattr *priority = attrs[CRYPTOCFGA_PRIORITY_VAL]; | |
294 | LIST_HEAD(list); | |
295 | ||
639b4ac6 | 296 | if (!netlink_capable(skb, CAP_NET_ADMIN)) |
c568398a MCO |
297 | return -EPERM; |
298 | ||
8fd61d34 MK |
299 | if (!null_terminated(p->cru_name) || !null_terminated(p->cru_driver_name)) |
300 | return -EINVAL; | |
301 | ||
a38f7907 SK |
302 | if (priority && !strlen(p->cru_driver_name)) |
303 | return -EINVAL; | |
304 | ||
305 | alg = crypto_alg_match(p, 1); | |
306 | if (!alg) | |
307 | return -ENOENT; | |
308 | ||
309 | down_write(&crypto_alg_sem); | |
310 | ||
311 | crypto_remove_spawns(alg, &list, NULL); | |
312 | ||
313 | if (priority) | |
314 | alg->cra_priority = nla_get_u32(priority); | |
315 | ||
316 | up_write(&crypto_alg_sem); | |
317 | ||
016baaa1 | 318 | crypto_mod_put(alg); |
a38f7907 SK |
319 | crypto_remove_final(&list); |
320 | ||
321 | return 0; | |
322 | } | |
323 | ||
324 | static int crypto_del_alg(struct sk_buff *skb, struct nlmsghdr *nlh, | |
325 | struct nlattr **attrs) | |
326 | { | |
327 | struct crypto_alg *alg; | |
328 | struct crypto_user_alg *p = nlmsg_data(nlh); | |
016baaa1 | 329 | int err; |
a38f7907 | 330 | |
639b4ac6 | 331 | if (!netlink_capable(skb, CAP_NET_ADMIN)) |
c568398a MCO |
332 | return -EPERM; |
333 | ||
8fd61d34 MK |
334 | if (!null_terminated(p->cru_name) || !null_terminated(p->cru_driver_name)) |
335 | return -EINVAL; | |
336 | ||
a38f7907 SK |
337 | alg = crypto_alg_match(p, 1); |
338 | if (!alg) | |
339 | return -ENOENT; | |
340 | ||
341 | /* We can not unregister core algorithms such as aes-generic. | |
342 | * We would loose the reference in the crypto_alg_list to this algorithm | |
343 | * if we try to unregister. Unregistering such an algorithm without | |
344 | * removing the module is not possible, so we restrict to crypto | |
345 | * instances that are build from templates. */ | |
016baaa1 | 346 | err = -EINVAL; |
a38f7907 | 347 | if (!(alg->cra_flags & CRYPTO_ALG_INSTANCE)) |
016baaa1 | 348 | goto drop_alg; |
a38f7907 | 349 | |
016baaa1 HX |
350 | err = -EBUSY; |
351 | if (atomic_read(&alg->cra_refcnt) > 2) | |
352 | goto drop_alg; | |
a38f7907 | 353 | |
016baaa1 HX |
354 | err = crypto_unregister_instance((struct crypto_instance *)alg); |
355 | ||
356 | drop_alg: | |
357 | crypto_mod_put(alg); | |
358 | return err; | |
a38f7907 SK |
359 | } |
360 | ||
1e122994 SK |
361 | static struct crypto_alg *crypto_user_skcipher_alg(const char *name, u32 type, |
362 | u32 mask) | |
363 | { | |
364 | int err; | |
365 | struct crypto_alg *alg; | |
366 | ||
367 | type = crypto_skcipher_type(type); | |
368 | mask = crypto_skcipher_mask(mask); | |
369 | ||
370 | for (;;) { | |
371 | alg = crypto_lookup_skcipher(name, type, mask); | |
372 | if (!IS_ERR(alg)) | |
373 | return alg; | |
374 | ||
375 | err = PTR_ERR(alg); | |
376 | if (err != -EAGAIN) | |
377 | break; | |
378 | if (signal_pending(current)) { | |
379 | err = -EINTR; | |
380 | break; | |
381 | } | |
382 | } | |
383 | ||
384 | return ERR_PTR(err); | |
385 | } | |
386 | ||
a38f7907 SK |
387 | static int crypto_add_alg(struct sk_buff *skb, struct nlmsghdr *nlh, |
388 | struct nlattr **attrs) | |
389 | { | |
0cfdec7a | 390 | int exact = 0; |
a38f7907 SK |
391 | const char *name; |
392 | struct crypto_alg *alg; | |
393 | struct crypto_user_alg *p = nlmsg_data(nlh); | |
394 | struct nlattr *priority = attrs[CRYPTOCFGA_PRIORITY_VAL]; | |
395 | ||
639b4ac6 | 396 | if (!netlink_capable(skb, CAP_NET_ADMIN)) |
c568398a MCO |
397 | return -EPERM; |
398 | ||
8fd61d34 MK |
399 | if (!null_terminated(p->cru_name) || !null_terminated(p->cru_driver_name)) |
400 | return -EINVAL; | |
401 | ||
a38f7907 SK |
402 | if (strlen(p->cru_driver_name)) |
403 | exact = 1; | |
404 | ||
405 | if (priority && !exact) | |
406 | return -EINVAL; | |
407 | ||
408 | alg = crypto_alg_match(p, exact); | |
016baaa1 HX |
409 | if (alg) { |
410 | crypto_mod_put(alg); | |
a38f7907 | 411 | return -EEXIST; |
016baaa1 | 412 | } |
a38f7907 SK |
413 | |
414 | if (strlen(p->cru_driver_name)) | |
415 | name = p->cru_driver_name; | |
416 | else | |
417 | name = p->cru_name; | |
418 | ||
1e122994 | 419 | switch (p->cru_type & p->cru_mask & CRYPTO_ALG_TYPE_MASK) { |
1e122994 SK |
420 | case CRYPTO_ALG_TYPE_GIVCIPHER: |
421 | case CRYPTO_ALG_TYPE_BLKCIPHER: | |
422 | case CRYPTO_ALG_TYPE_ABLKCIPHER: | |
423 | alg = crypto_user_skcipher_alg(name, p->cru_type, p->cru_mask); | |
424 | break; | |
425 | default: | |
426 | alg = crypto_alg_mod_lookup(name, p->cru_type, p->cru_mask); | |
427 | } | |
428 | ||
a38f7907 SK |
429 | if (IS_ERR(alg)) |
430 | return PTR_ERR(alg); | |
431 | ||
432 | down_write(&crypto_alg_sem); | |
433 | ||
434 | if (priority) | |
435 | alg->cra_priority = nla_get_u32(priority); | |
436 | ||
437 | up_write(&crypto_alg_sem); | |
438 | ||
439 | crypto_mod_put(alg); | |
440 | ||
441 | return 0; | |
442 | } | |
443 | ||
9aa867e4 HX |
444 | static int crypto_del_rng(struct sk_buff *skb, struct nlmsghdr *nlh, |
445 | struct nlattr **attrs) | |
446 | { | |
447 | if (!netlink_capable(skb, CAP_NET_ADMIN)) | |
448 | return -EPERM; | |
449 | return crypto_del_default_rng(); | |
450 | } | |
451 | ||
a38f7907 SK |
452 | #define MSGSIZE(type) sizeof(struct type) |
453 | ||
454 | static const int crypto_msg_min[CRYPTO_NR_MSGTYPES] = { | |
455 | [CRYPTO_MSG_NEWALG - CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg), | |
456 | [CRYPTO_MSG_DELALG - CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg), | |
457 | [CRYPTO_MSG_UPDATEALG - CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg), | |
9aa867e4 | 458 | [CRYPTO_MSG_DELRNG - CRYPTO_MSG_BASE] = 0, |
a38f7907 SK |
459 | }; |
460 | ||
461 | static const struct nla_policy crypto_policy[CRYPTOCFGA_MAX+1] = { | |
462 | [CRYPTOCFGA_PRIORITY_VAL] = { .type = NLA_U32}, | |
463 | }; | |
464 | ||
465 | #undef MSGSIZE | |
466 | ||
a84fb791 | 467 | static const struct crypto_link { |
a38f7907 SK |
468 | int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **); |
469 | int (*dump)(struct sk_buff *, struct netlink_callback *); | |
470 | int (*done)(struct netlink_callback *); | |
471 | } crypto_dispatch[CRYPTO_NR_MSGTYPES] = { | |
472 | [CRYPTO_MSG_NEWALG - CRYPTO_MSG_BASE] = { .doit = crypto_add_alg}, | |
473 | [CRYPTO_MSG_DELALG - CRYPTO_MSG_BASE] = { .doit = crypto_del_alg}, | |
474 | [CRYPTO_MSG_UPDATEALG - CRYPTO_MSG_BASE] = { .doit = crypto_update_alg}, | |
475 | [CRYPTO_MSG_GETALG - CRYPTO_MSG_BASE] = { .doit = crypto_report, | |
476 | .dump = crypto_dump_report, | |
477 | .done = crypto_dump_report_done}, | |
9aa867e4 | 478 | [CRYPTO_MSG_DELRNG - CRYPTO_MSG_BASE] = { .doit = crypto_del_rng }, |
a38f7907 SK |
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"); |