[mirror_ubuntu-zesty-kernel.git] / crypto / crypto_user.c

/*
 * Crypto user configuration API.
 *
 * Copyright (C) 2011 secunet Security Networks AG
 * Copyright (C) 2011 Steffen Klassert <steffen.klassert@secunet.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include <linux/module.h>
#include <linux/crypto.h>
#include <linux/cryptouser.h>
#include <net/netlink.h>
#include <linux/security.h>
#include <net/net_namespace.h>
#include "internal.h"

DEFINE_MUTEX(crypto_cfg_mutex);

/* The crypto netlink socket */
static struct sock *crypto_nlsk;

struct crypto_dump_info {
	struct sk_buff *in_skb;
	struct sk_buff *out_skb;
	u32 nlmsg_seq;
	u16 nlmsg_flags;
};

static struct crypto_alg *crypto_alg_match(struct crypto_user_alg *p, int exact)
{
	int match;
	struct crypto_alg *q, *alg = NULL;

	down_read(&crypto_alg_sem);

	if (list_empty(&crypto_alg_list))
		return NULL;

	list_for_each_entry(q, &crypto_alg_list, cra_list) {

		if ((q->cra_flags ^ p->cru_type) & p->cru_mask)
			continue;

		if (strlen(p->cru_driver_name))
			match = !strcmp(q->cra_driver_name,
					p->cru_driver_name);
		else if (!exact)
			match = !strcmp(q->cra_name, p->cru_name);

		if (match) {
			alg = q;
			break;
		}
	}

	up_read(&crypto_alg_sem);

	return alg;
}

static int crypto_report_one(struct crypto_alg *alg,
			     struct crypto_user_alg *ualg, struct sk_buff *skb)
{
	memcpy(&ualg->cru_name, &alg->cra_name, sizeof(ualg->cru_name));
	memcpy(&ualg->cru_driver_name, &alg->cra_driver_name,
	       sizeof(ualg->cru_driver_name));
	memcpy(&ualg->cru_module_name, module_name(alg->cra_module),
	       CRYPTO_MAX_ALG_NAME);

	ualg->cru_flags = alg->cra_flags;
	ualg->cru_refcnt = atomic_read(&alg->cra_refcnt);

	NLA_PUT_U32(skb, CRYPTOCFGA_PRIORITY_VAL, alg->cra_priority);

	return 0;

nla_put_failure:
	return -EMSGSIZE;
}

static int crypto_report_alg(struct crypto_alg *alg,
			     struct crypto_dump_info *info)
{
	struct sk_buff *in_skb = info->in_skb;
	struct sk_buff *skb = info->out_skb;
	struct nlmsghdr *nlh;
	struct crypto_user_alg *ualg;
	int err = 0;

	nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, info->nlmsg_seq,
			CRYPTO_MSG_GETALG, sizeof(*ualg), info->nlmsg_flags);
	if (!nlh) {
		err = -EMSGSIZE;
		goto out;
	}

	ualg = nlmsg_data(nlh);

	err = crypto_report_one(alg, ualg, skb);
	if (err) {
		nlmsg_cancel(skb, nlh);
		goto out;
	}

	nlmsg_end(skb, nlh);

out:
	return err;
}

static int crypto_report(struct sk_buff *in_skb, struct nlmsghdr *in_nlh,
			 struct nlattr **attrs)
{
	struct crypto_user_alg *p = nlmsg_data(in_nlh);
	struct crypto_alg *alg;
	struct sk_buff *skb;
	struct crypto_dump_info info;
	int err;

	if (!p->cru_driver_name)
		return -EINVAL;

	alg = crypto_alg_match(p, 1);
	if (!alg)
		return -ENOENT;

	skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
	if (!skb)
		return -ENOMEM;

	info.in_skb = in_skb;
	info.out_skb = skb;
	info.nlmsg_seq = in_nlh->nlmsg_seq;
	info.nlmsg_flags = 0;

	err = crypto_report_alg(alg, &info);
	if (err)
		return err;

	return nlmsg_unicast(crypto_nlsk, skb, NETLINK_CB(in_skb).pid);
}

static int crypto_dump_report(struct sk_buff *skb, struct netlink_callback *cb)
{
	struct crypto_alg *alg;
	struct crypto_dump_info info;
	int err;

	if (cb->args[0])
		goto out;

	cb->args[0] = 1;

	info.in_skb = cb->skb;
	info.out_skb = skb;
	info.nlmsg_seq = cb->nlh->nlmsg_seq;
	info.nlmsg_flags = NLM_F_MULTI;

	list_for_each_entry(alg, &crypto_alg_list, cra_list) {
		err = crypto_report_alg(alg, &info);
		if (err)
			goto out_err;
	}

out:
	return skb->len;
out_err:
	return err;
}

static int crypto_dump_report_done(struct netlink_callback *cb)
{
	return 0;
}

static int crypto_update_alg(struct sk_buff *skb, struct nlmsghdr *nlh,
			     struct nlattr **attrs)
{
	struct crypto_alg *alg;
	struct crypto_user_alg *p = nlmsg_data(nlh);
	struct nlattr *priority = attrs[CRYPTOCFGA_PRIORITY_VAL];
	LIST_HEAD(list);

	if (priority && !strlen(p->cru_driver_name))
		return -EINVAL;

	alg = crypto_alg_match(p, 1);
	if (!alg)
		return -ENOENT;

	down_write(&crypto_alg_sem);

	crypto_remove_spawns(alg, &list, NULL);

	if (priority)
		alg->cra_priority = nla_get_u32(priority);

	up_write(&crypto_alg_sem);

	crypto_remove_final(&list);

	return 0;
}

static int crypto_del_alg(struct sk_buff *skb, struct nlmsghdr *nlh,
			  struct nlattr **attrs)
{
	struct crypto_alg *alg;
	struct crypto_user_alg *p = nlmsg_data(nlh);

	alg = crypto_alg_match(p, 1);
	if (!alg)
		return -ENOENT;

	/* We can not unregister core algorithms such as aes-generic.
	 * We would loose the reference in the crypto_alg_list to this algorithm
	 * if we try to unregister. Unregistering such an algorithm without
	 * removing the module is not possible, so we restrict to crypto
	 * instances that are build from templates. */
	if (!(alg->cra_flags & CRYPTO_ALG_INSTANCE))
		return -EINVAL;

	if (atomic_read(&alg->cra_refcnt) != 1)
		return -EBUSY;

	return crypto_unregister_alg(alg);
}

static int crypto_add_alg(struct sk_buff *skb, struct nlmsghdr *nlh,
			  struct nlattr **attrs)
{
	int exact;
	const char *name;
	struct crypto_alg *alg;
	struct crypto_user_alg *p = nlmsg_data(nlh);
	struct nlattr *priority = attrs[CRYPTOCFGA_PRIORITY_VAL];

	if (strlen(p->cru_driver_name))
		exact = 1;

	if (priority && !exact)
		return -EINVAL;

	alg = crypto_alg_match(p, exact);
	if (alg)
		return -EEXIST;

	if (strlen(p->cru_driver_name))
		name = p->cru_driver_name;
	else
		name = p->cru_name;

	alg = crypto_alg_mod_lookup(name, p->cru_type, p->cru_mask);
	if (IS_ERR(alg))
		return PTR_ERR(alg);

	down_write(&crypto_alg_sem);

	if (priority)
		alg->cra_priority = nla_get_u32(priority);

	up_write(&crypto_alg_sem);

	crypto_mod_put(alg);

	return 0;
}

#define MSGSIZE(type) sizeof(struct type)

static const int crypto_msg_min[CRYPTO_NR_MSGTYPES] = {
	[CRYPTO_MSG_NEWALG	- CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg),
	[CRYPTO_MSG_DELALG	- CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg),
	[CRYPTO_MSG_UPDATEALG	- CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg),
	[CRYPTO_MSG_GETALG	- CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg),
};

static const struct nla_policy crypto_policy[CRYPTOCFGA_MAX+1] = {
	[CRYPTOCFGA_PRIORITY_VAL]   = { .type = NLA_U32},
};

#undef MSGSIZE

static struct crypto_link {
	int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
	int (*dump)(struct sk_buff *, struct netlink_callback *);
	int (*done)(struct netlink_callback *);
} crypto_dispatch[CRYPTO_NR_MSGTYPES] = {
	[CRYPTO_MSG_NEWALG	- CRYPTO_MSG_BASE] = { .doit = crypto_add_alg},
	[CRYPTO_MSG_DELALG	- CRYPTO_MSG_BASE] = { .doit = crypto_del_alg},
	[CRYPTO_MSG_UPDATEALG	- CRYPTO_MSG_BASE] = { .doit = crypto_update_alg},
	[CRYPTO_MSG_GETALG	- CRYPTO_MSG_BASE] = { .doit = crypto_report,
						       .dump = crypto_dump_report,
						       .done = crypto_dump_report_done},
};

static int crypto_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
{
	struct nlattr *attrs[CRYPTOCFGA_MAX+1];
	struct crypto_link *link;
	int type, err;

	type = nlh->nlmsg_type;
	if (type > CRYPTO_MSG_MAX)
		return -EINVAL;

	type -= CRYPTO_MSG_BASE;
	link = &crypto_dispatch[type];

	if (security_netlink_recv(skb, CAP_NET_ADMIN))
		return -EPERM;

	if ((type == (CRYPTO_MSG_GETALG - CRYPTO_MSG_BASE) &&
	    (nlh->nlmsg_flags & NLM_F_DUMP))) {
		if (link->dump == NULL)
			return -EINVAL;

		return netlink_dump_start(crypto_nlsk, skb, nlh,
					  link->dump, link->done, 0);
	}

	err = nlmsg_parse(nlh, crypto_msg_min[type], attrs, CRYPTOCFGA_MAX,
			  crypto_policy);
	if (err < 0)
		return err;

	if (link->doit == NULL)
		return -EINVAL;

	return link->doit(skb, nlh, attrs);
}

static void crypto_netlink_rcv(struct sk_buff *skb)
{
	mutex_lock(&crypto_cfg_mutex);
	netlink_rcv_skb(skb, &crypto_user_rcv_msg);
	mutex_unlock(&crypto_cfg_mutex);
}

static int __init crypto_user_init(void)
{
	crypto_nlsk = netlink_kernel_create(&init_net, NETLINK_CRYPTO,
					    0, crypto_netlink_rcv,
					    NULL, THIS_MODULE);
	if (!crypto_nlsk)
		return -ENOMEM;

	return 0;
}

static void __exit crypto_user_exit(void)
{
	netlink_kernel_release(crypto_nlsk);
}

module_init(crypto_user_init);
module_exit(crypto_user_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Steffen Klassert <steffen.klassert@secunet.com>");
MODULE_DESCRIPTION("Crypto userspace configuration API");
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>
	24	#include <net/netlink.h>
	25	#include <linux/security.h>
	26	#include <net/net_namespace.h>
	27	#include "internal.h"
	28
	29	DEFINE_MUTEX(crypto_cfg_mutex);
	30
	31	/* The crypto netlink socket */
	32	static struct sock *crypto_nlsk;
	33
	34	struct crypto_dump_info {
	35	struct sk_buff *in_skb;
	36	struct sk_buff *out_skb;
	37	u32 nlmsg_seq;
	38	u16 nlmsg_flags;
	39	};
	40
	41	static struct crypto_alg crypto_alg_match(struct crypto_user_alg p, int exact)
	42	{
	43	int match;
	44	struct crypto_alg q, alg = NULL;
	45
	46	down_read(&crypto_alg_sem);
	47
	48	if (list_empty(&crypto_alg_list))
	49	return NULL;
	50
	51	list_for_each_entry(q, &crypto_alg_list, cra_list) {
	52
	53	if ((q->cra_flags ^ p->cru_type) & p->cru_mask)
	54	continue;
	55
	56	if (strlen(p->cru_driver_name))
	57	match = !strcmp(q->cra_driver_name,
	58	p->cru_driver_name);
	59	else if (!exact)
	60	match = !strcmp(q->cra_name, p->cru_name);
	61
	62	if (match) {
	63	alg = q;
	64	break;
65	}
66	}
67
68	up_read(&crypto_alg_sem);
69
70	return alg;
71	}
72
73	static int crypto_report_one(struct crypto_alg *alg,
74	struct crypto_user_alg ualg, struct sk_buff skb)
75	{
76	memcpy(&ualg->cru_name, &alg->cra_name, sizeof(ualg->cru_name));
77	memcpy(&ualg->cru_driver_name, &alg->cra_driver_name,
78	sizeof(ualg->cru_driver_name));
79	memcpy(&ualg->cru_module_name, module_name(alg->cra_module),
80	CRYPTO_MAX_ALG_NAME);
81
82	ualg->cru_flags = alg->cra_flags;
83	ualg->cru_refcnt = atomic_read(&alg->cra_refcnt);
84
85	NLA_PUT_U32(skb, CRYPTOCFGA_PRIORITY_VAL, alg->cra_priority);
86
87	return 0;
88
89	nla_put_failure:
90	return -EMSGSIZE;
91	}
92
93	static int crypto_report_alg(struct crypto_alg *alg,
94	struct crypto_dump_info *info)
95	{
96	struct sk_buff *in_skb = info->in_skb;
97	struct sk_buff *skb = info->out_skb;
98	struct nlmsghdr *nlh;
99	struct crypto_user_alg *ualg;
100	int err = 0;
101
102	nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, info->nlmsg_seq,
103	CRYPTO_MSG_GETALG, sizeof(*ualg), info->nlmsg_flags);
104	if (!nlh) {
105	err = -EMSGSIZE;
106	goto out;
107	}
108
109	ualg = nlmsg_data(nlh);
110
111	err = crypto_report_one(alg, ualg, skb);
112	if (err) {
113	nlmsg_cancel(skb, nlh);
114	goto out;
115	}
116
117	nlmsg_end(skb, nlh);
118
119	out:
120	return err;
121	}
122
123	static int crypto_report(struct sk_buff in_skb, struct nlmsghdr in_nlh,
124	struct nlattr **attrs)
125	{
126	struct crypto_user_alg *p = nlmsg_data(in_nlh);
127	struct crypto_alg *alg;
128	struct sk_buff *skb;
129	struct crypto_dump_info info;
130	int err;
131
132	if (!p->cru_driver_name)
133	return -EINVAL;
134
135	alg = crypto_alg_match(p, 1);
136	if (!alg)
137	return -ENOENT;
138
139	skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
140	if (!skb)
141	return -ENOMEM;
142
143	info.in_skb = in_skb;
144	info.out_skb = skb;
145	info.nlmsg_seq = in_nlh->nlmsg_seq;
146	info.nlmsg_flags = 0;
147
148	err = crypto_report_alg(alg, &info);
149	if (err)
150	return err;
151
152	return nlmsg_unicast(crypto_nlsk, skb, NETLINK_CB(in_skb).pid);
153	}
154
155	static int crypto_dump_report(struct sk_buff skb, struct netlink_callback cb)
156	{
157	struct crypto_alg *alg;
158	struct crypto_dump_info info;
159	int err;
160
161	if (cb->args[0])
162	goto out;
163
164	cb->args[0] = 1;
165
166	info.in_skb = cb->skb;
167	info.out_skb = skb;
168	info.nlmsg_seq = cb->nlh->nlmsg_seq;
169	info.nlmsg_flags = NLM_F_MULTI;
170
171	list_for_each_entry(alg, &crypto_alg_list, cra_list) {
172	err = crypto_report_alg(alg, &info);
173	if (err)
174	goto out_err;
175	}
176
177	out:
178	return skb->len;
179	out_err:
180	return err;
181	}
182
183	static int crypto_dump_report_done(struct netlink_callback *cb)
184	{
185	return 0;
186	}
187
188	static int crypto_update_alg(struct sk_buff skb, struct nlmsghdr nlh,
189	struct nlattr **attrs)
190	{
191	struct crypto_alg *alg;
192	struct crypto_user_alg *p = nlmsg_data(nlh);
193	struct nlattr *priority = attrs[CRYPTOCFGA_PRIORITY_VAL];
194	LIST_HEAD(list);
195
196	if (priority && !strlen(p->cru_driver_name))
197	return -EINVAL;
198
199	alg = crypto_alg_match(p, 1);
200	if (!alg)
201	return -ENOENT;
202
203	down_write(&crypto_alg_sem);
204
205	crypto_remove_spawns(alg, &list, NULL);
206
207	if (priority)
208	alg->cra_priority = nla_get_u32(priority);
209
210	up_write(&crypto_alg_sem);
211
212	crypto_remove_final(&list);
213
214	return 0;
215	}
216
217	static int crypto_del_alg(struct sk_buff skb, struct nlmsghdr nlh,
218	struct nlattr **attrs)
219	{
220	struct crypto_alg *alg;
221	struct crypto_user_alg *p = nlmsg_data(nlh);
222
223	alg = crypto_alg_match(p, 1);
224	if (!alg)
225	return -ENOENT;
226
227	/* We can not unregister core algorithms such as aes-generic.
228	* We would loose the reference in the crypto_alg_list to this algorithm
229	* if we try to unregister. Unregistering such an algorithm without
230	* removing the module is not possible, so we restrict to crypto
231	* instances that are build from templates. */
232	if (!(alg->cra_flags & CRYPTO_ALG_INSTANCE))
233	return -EINVAL;
234
235	if (atomic_read(&alg->cra_refcnt) != 1)
236	return -EBUSY;
237
238	return crypto_unregister_alg(alg);
239	}
240
241	static int crypto_add_alg(struct sk_buff skb, struct nlmsghdr nlh,
242	struct nlattr **attrs)
243	{
244	int exact;
245	const char *name;
246	struct crypto_alg *alg;
247	struct crypto_user_alg *p = nlmsg_data(nlh);
248	struct nlattr *priority = attrs[CRYPTOCFGA_PRIORITY_VAL];
249
250	if (strlen(p->cru_driver_name))
251	exact = 1;
252
253	if (priority && !exact)
254	return -EINVAL;
255
256	alg = crypto_alg_match(p, exact);
257	if (alg)
258	return -EEXIST;
259
260	if (strlen(p->cru_driver_name))
261	name = p->cru_driver_name;
262	else
263	name = p->cru_name;
264
265	alg = crypto_alg_mod_lookup(name, p->cru_type, p->cru_mask);
266	if (IS_ERR(alg))
267	return PTR_ERR(alg);
268
269	down_write(&crypto_alg_sem);
270
271	if (priority)
272	alg->cra_priority = nla_get_u32(priority);
273
274	up_write(&crypto_alg_sem);
275
276	crypto_mod_put(alg);
277
278	return 0;
279	}
280
281	#define MSGSIZE(type) sizeof(struct type)
282
283	static const int crypto_msg_min[CRYPTO_NR_MSGTYPES] = {
284	[CRYPTO_MSG_NEWALG - CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg),
285	[CRYPTO_MSG_DELALG - CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg),
286	[CRYPTO_MSG_UPDATEALG - CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg),
287	[CRYPTO_MSG_GETALG - CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg),
288	};
289
290	static const struct nla_policy crypto_policy[CRYPTOCFGA_MAX+1] = {
291	[CRYPTOCFGA_PRIORITY_VAL] = { .type = NLA_U32},
292	};
293
294	#undef MSGSIZE
295
296	static struct crypto_link {
297	int (doit)(struct sk_buff , struct nlmsghdr , struct nlattr *);
298	int (dump)(struct sk_buff , struct netlink_callback *);
299	int (done)(struct netlink_callback );
300	} crypto_dispatch[CRYPTO_NR_MSGTYPES] = {
301	[CRYPTO_MSG_NEWALG - CRYPTO_MSG_BASE] = { .doit = crypto_add_alg},
302	[CRYPTO_MSG_DELALG - CRYPTO_MSG_BASE] = { .doit = crypto_del_alg},
303	[CRYPTO_MSG_UPDATEALG - CRYPTO_MSG_BASE] = { .doit = crypto_update_alg},
304	[CRYPTO_MSG_GETALG - CRYPTO_MSG_BASE] = { .doit = crypto_report,
305	.dump = crypto_dump_report,
306	.done = crypto_dump_report_done},
307	};
308
309	static int crypto_user_rcv_msg(struct sk_buff skb, struct nlmsghdr nlh)
310	{
311	struct nlattr *attrs[CRYPTOCFGA_MAX+1];
312	struct crypto_link *link;
313	int type, err;
314
315	type = nlh->nlmsg_type;
316	if (type > CRYPTO_MSG_MAX)
317	return -EINVAL;
318
319	type -= CRYPTO_MSG_BASE;
320	link = &crypto_dispatch[type];
321
322	if (security_netlink_recv(skb, CAP_NET_ADMIN))
323	return -EPERM;
324
325	if ((type == (CRYPTO_MSG_GETALG - CRYPTO_MSG_BASE) &&
326	(nlh->nlmsg_flags & NLM_F_DUMP))) {
327	if (link->dump == NULL)
328	return -EINVAL;
329
330	return netlink_dump_start(crypto_nlsk, skb, nlh,
331	link->dump, link->done, 0);
332	}
333
334	err = nlmsg_parse(nlh, crypto_msg_min[type], attrs, CRYPTOCFGA_MAX,
335	crypto_policy);
336	if (err < 0)
337	return err;
338
339	if (link->doit == NULL)
340	return -EINVAL;
341
342	return link->doit(skb, nlh, attrs);
343	}
344
345	static void crypto_netlink_rcv(struct sk_buff *skb)
346	{
347	mutex_lock(&crypto_cfg_mutex);
348	netlink_rcv_skb(skb, &crypto_user_rcv_msg);
349	mutex_unlock(&crypto_cfg_mutex);
350	}
351
352	static int __init crypto_user_init(void)
353	{
354	crypto_nlsk = netlink_kernel_create(&init_net, NETLINK_CRYPTO,
355	0, crypto_netlink_rcv,
356	NULL, THIS_MODULE);
357	if (!crypto_nlsk)
358	return -ENOMEM;
359
360	return 0;
361	}
362
363	static void __exit crypto_user_exit(void)
364	{
365	netlink_kernel_release(crypto_nlsk);
366	}
367
368	module_init(crypto_user_init);
369	module_exit(crypto_user_exit);
370	MODULE_LICENSE("GPL");
371	MODULE_AUTHOR("Steffen Klassert <steffen.klassert@secunet.com>");
372	MODULE_DESCRIPTION("Crypto userspace configuration API");