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authorCorentin Labbe <clabbe@baylibre.com>2018-09-19 13:10:54 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2018-09-28 07:46:25 +0300
commitcac5818c25d0423bda73e2b6997404ed0a7ed9e3 (patch)
tree3a443fa0e9a8e96799e2802552cd1f6435213569 /crypto/crypto_user.c
parenta9cbfe4c784436368790f0c59674f99ba97ae21e (diff)
downloadlinux-cac5818c25d0423bda73e2b6997404ed0a7ed9e3.tar.xz
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>
Diffstat (limited to 'crypto/crypto_user.c')
-rw-r--r--crypto/crypto_user.c566
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");