crypto: user - Implement a generic crypto statistics

This patch implement a generic way to get statistics about all crypto
usages.

Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 0 insertions, 566 deletions

diff --git a/crypto/crypto_user.c b/crypto/crypto_user.c
deleted file mode 100644
index 0e89b5457cab..000000000000
--- a/crypto/crypto_user.c
+++ /dev/null
@@ -1,566 +0,0 @@
-/*
- * 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 <linux/sched.h>
-#include <net/netlink.h>
-#include <linux/security.h>
-#include <net/net_namespace.h>
-#include <crypto/internal/skcipher.h>
-#include <crypto/internal/rng.h>
-#include <crypto/akcipher.h>
-#include <crypto/kpp.h>
-
-#include "internal.h"
-
-#define null_terminated(x)	(strnlen(x, sizeof(x)) < sizeof(x))
-
-static 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)
-{
-	struct crypto_alg *q, *alg = NULL;
-
-	down_read(&crypto_alg_sem);
-
-	list_for_each_entry(q, &crypto_alg_list, cra_list) {
-		int match = 0;
-
-		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)
-			continue;
-
-		if (unlikely(!crypto_mod_get(q)))
-			continue;
-
-		alg = q;
-		break;
-	}
-
-	up_read(&crypto_alg_sem);
-
-	return alg;
-}
-
-static int crypto_report_cipher(struct sk_buff *skb, struct crypto_alg *alg)
-{
-	struct crypto_report_cipher rcipher;
-
-	strlcpy(rcipher.type, "cipher", sizeof(rcipher.type));
-
-	rcipher.blocksize = alg->cra_blocksize;
-	rcipher.min_keysize = alg->cra_cipher.cia_min_keysize;
-	rcipher.max_keysize = alg->cra_cipher.cia_max_keysize;
-
-	if (nla_put(skb, CRYPTOCFGA_REPORT_CIPHER,
-		    sizeof(struct crypto_report_cipher), &rcipher))
-		goto nla_put_failure;
-	return 0;
-
-nla_put_failure:
-	return -EMSGSIZE;
-}
-
-static int crypto_report_comp(struct sk_buff *skb, struct crypto_alg *alg)
-{
-	struct crypto_report_comp rcomp;
-
-	strlcpy(rcomp.type, "compression", sizeof(rcomp.type));
-	if (nla_put(skb, CRYPTOCFGA_REPORT_COMPRESS,
-		    sizeof(struct crypto_report_comp), &rcomp))
-		goto nla_put_failure;
-	return 0;
-
-nla_put_failure:
-	return -EMSGSIZE;
-}
-
-static int crypto_report_acomp(struct sk_buff *skb, struct crypto_alg *alg)
-{
-	struct crypto_report_acomp racomp;
-
-	strlcpy(racomp.type, "acomp", sizeof(racomp.type));
-
-	if (nla_put(skb, CRYPTOCFGA_REPORT_ACOMP,
-		    sizeof(struct crypto_report_acomp), &racomp))
-		goto nla_put_failure;
-	return 0;
-
-nla_put_failure:
-	return -EMSGSIZE;
-}
-
-static int crypto_report_akcipher(struct sk_buff *skb, struct crypto_alg *alg)
-{
-	struct crypto_report_akcipher rakcipher;
-
-	strlcpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
-
-	if (nla_put(skb, CRYPTOCFGA_REPORT_AKCIPHER,
-		    sizeof(struct crypto_report_akcipher), &rakcipher))
-		goto nla_put_failure;
-	return 0;
-
-nla_put_failure:
-	return -EMSGSIZE;
-}
-
-static int crypto_report_kpp(struct sk_buff *skb, struct crypto_alg *alg)
-{
-	struct crypto_report_kpp rkpp;
-
-	strlcpy(rkpp.type, "kpp", sizeof(rkpp.type));
-
-	if (nla_put(skb, CRYPTOCFGA_REPORT_KPP,
-		    sizeof(struct crypto_report_kpp), &rkpp))
-		goto nla_put_failure;
-	return 0;
-
-nla_put_failure:
-	return -EMSGSIZE;
-}
-
-static int crypto_report_one(struct crypto_alg *alg,
-			     struct crypto_user_alg *ualg, struct sk_buff *skb)
-{
-	strlcpy(ualg->cru_name, alg->cra_name, sizeof(ualg->cru_name));
-	strlcpy(ualg->cru_driver_name, alg->cra_driver_name,
-		sizeof(ualg->cru_driver_name));
-	strlcpy(ualg->cru_module_name, module_name(alg->cra_module),
-		sizeof(ualg->cru_module_name));
-
-	ualg->cru_type = 0;
-	ualg->cru_mask = 0;
-	ualg->cru_flags = alg->cra_flags;
-	ualg->cru_refcnt = refcount_read(&alg->cra_refcnt);
-
-	if (nla_put_u32(skb, CRYPTOCFGA_PRIORITY_VAL, alg->cra_priority))
-		goto nla_put_failure;
-	if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
-		struct crypto_report_larval rl;
-
-		strlcpy(rl.type, "larval", sizeof(rl.type));
-		if (nla_put(skb, CRYPTOCFGA_REPORT_LARVAL,
-			    sizeof(struct crypto_report_larval), &rl))
-			goto nla_put_failure;
-		goto out;
-	}
-
-	if (alg->cra_type && alg->cra_type->report) {
-		if (alg->cra_type->report(skb, alg))
-			goto nla_put_failure;
-
-		goto out;
-	}
-
-	switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) {
-	case CRYPTO_ALG_TYPE_CIPHER:
-		if (crypto_report_cipher(skb, alg))
-			goto nla_put_failure;
-
-		break;
-	case CRYPTO_ALG_TYPE_COMPRESS:
-		if (crypto_report_comp(skb, alg))
-			goto nla_put_failure;
-
-		break;
-	case CRYPTO_ALG_TYPE_ACOMPRESS:
-		if (crypto_report_acomp(skb, alg))
-			goto nla_put_failure;
-
-		break;
-	case CRYPTO_ALG_TYPE_AKCIPHER:
-		if (crypto_report_akcipher(skb, alg))
-			goto nla_put_failure;
-
-		break;
-	case CRYPTO_ALG_TYPE_KPP:
-		if (crypto_report_kpp(skb, alg))
-			goto nla_put_failure;
-		break;
-	}
-
-out:
-	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).portid, 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 (!null_terminated(p->cru_name) || !null_terminated(p->cru_driver_name))
-		return -EINVAL;
-
-	alg = crypto_alg_match(p, 0);
-	if (!alg)
-		return -ENOENT;
-
-	err = -ENOMEM;
-	skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
-	if (!skb)
-		goto drop_alg;
-
-	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);
-
-drop_alg:
-	crypto_mod_put(alg);
-
-	if (err)
-		return err;
-
-	return nlmsg_unicast(crypto_nlsk, skb, NETLINK_CB(in_skb).portid);
-}
-
-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 (!netlink_capable(skb, CAP_NET_ADMIN))
-		return -EPERM;
-
-	if (!null_terminated(p->cru_name) || !null_terminated(p->cru_driver_name))
-		return -EINVAL;
-
-	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_mod_put(alg);
-	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);
-	int err;
-
-	if (!netlink_capable(skb, CAP_NET_ADMIN))
-		return -EPERM;
-
-	if (!null_terminated(p->cru_name) || !null_terminated(p->cru_driver_name))
-		return -EINVAL;
-
-	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. */
-	err = -EINVAL;
-	if (!(alg->cra_flags & CRYPTO_ALG_INSTANCE))
-		goto drop_alg;
-
-	err = -EBUSY;
-	if (refcount_read(&alg->cra_refcnt) > 2)
-		goto drop_alg;
-
-	err = crypto_unregister_instance((struct crypto_instance *)alg);
-
-drop_alg:
-	crypto_mod_put(alg);
-	return err;
-}
-
-static int crypto_add_alg(struct sk_buff *skb, struct nlmsghdr *nlh,
-			  struct nlattr **attrs)
-{
-	int exact = 0;
-	const char *name;
-	struct crypto_alg *alg;
-	struct crypto_user_alg *p = nlmsg_data(nlh);
-	struct nlattr *priority = attrs[CRYPTOCFGA_PRIORITY_VAL];
-
-	if (!netlink_capable(skb, CAP_NET_ADMIN))
-		return -EPERM;
-
-	if (!null_terminated(p->cru_name) || !null_terminated(p->cru_driver_name))
-		return -EINVAL;
-
-	if (strlen(p->cru_driver_name))
-		exact = 1;
-
-	if (priority && !exact)
-		return -EINVAL;
-
-	alg = crypto_alg_match(p, exact);
-	if (alg) {
-		crypto_mod_put(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;
-}
-
-static int crypto_del_rng(struct sk_buff *skb, struct nlmsghdr *nlh,
-			  struct nlattr **attrs)
-{
-	if (!netlink_capable(skb, CAP_NET_ADMIN))
-		return -EPERM;
-	return crypto_del_default_rng();
-}
-
-#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),
-	[CRYPTO_MSG_DELRNG	- CRYPTO_MSG_BASE] = 0,
-};
-
-static const struct nla_policy crypto_policy[CRYPTOCFGA_MAX+1] = {
-	[CRYPTOCFGA_PRIORITY_VAL]   = { .type = NLA_U32},
-};
-
-#undef MSGSIZE
-
-static const 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},
-	[CRYPTO_MSG_DELRNG	- CRYPTO_MSG_BASE] = { .doit = crypto_del_rng },
-};
-
-static int crypto_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
-			       struct netlink_ext_ack *extack)
-{
-	struct nlattr *attrs[CRYPTOCFGA_MAX+1];
-	const 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 ((type == (CRYPTO_MSG_GETALG - CRYPTO_MSG_BASE) &&
-	    (nlh->nlmsg_flags & NLM_F_DUMP))) {
-		struct crypto_alg *alg;
-		u16 dump_alloc = 0;
-
-		if (link->dump == NULL)
-			return -EINVAL;
-
-		down_read(&crypto_alg_sem);
-		list_for_each_entry(alg, &crypto_alg_list, cra_list)
-			dump_alloc += CRYPTO_REPORT_MAXSIZE;
-
-		{
-			struct netlink_dump_control c = {
-				.dump = link->dump,
-				.done = link->done,
-				.min_dump_alloc = dump_alloc,
-			};
-			err = netlink_dump_start(crypto_nlsk, skb, nlh, &c);
-		}
-		up_read(&crypto_alg_sem);
-
-		return err;
-	}
-
-	err = nlmsg_parse(nlh, crypto_msg_min[type], attrs, CRYPTOCFGA_MAX,
-			  crypto_policy, extack);
-	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)
-{
-	struct netlink_kernel_cfg cfg = {
-		.input	= crypto_netlink_rcv,
-	};
-
-	crypto_nlsk = netlink_kernel_create(&init_net, NETLINK_CRYPTO, &cfg);
-	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");
-MODULE_ALIAS("net-pf-16-proto-21");