korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-11 12:28:41 +08:00
Code Issues Packages Projects Releases Wiki Activity

tipc: add support for AEAD key setting via netlink

Browse Source 
This commit adds two netlink commands to TIPC in order for user to be
able to set or remove AEAD keys:
- TIPC_NL_KEY_SET
- TIPC_NL_KEY_FLUSH

When the 'KEY_SET' is given along with the key data, the key will be
initiated and attached to TIPC crypto. On the other hand, the
'KEY_FLUSH' command will remove all existing keys if any.

Acked-by: Ying Xue <ying.xue@windreiver.com>
Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: Tuong Lien <tuong.t.lien@dektech.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tuong Lien 2019-11-08 12:05:12 +07:00 committed by David S. Miller
parent fc1b6d6de2
commit e1f32190cf
4 changed files with 160 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/uapi/linux/tipc_netlink.h
View File

@ -63,6 +63,8 @@ enum {
TIPC_NL_PEER_REMOVE,
TIPC_NL_BEARER_ADD,
TIPC_NL_UDP_GET_REMOTEIP,
TIPC_NL_KEY_SET,
TIPC_NL_KEY_FLUSH,
__TIPC_NL_CMD_MAX,
TIPC_NL_CMD_MAX = __TIPC_NL_CMD_MAX - 1
@ -160,6 +162,8 @@ enum {
TIPC_NLA_NODE_UNSPEC,
TIPC_NLA_NODE_ADDR, /* u32 */
TIPC_NLA_NODE_UP, /* flag */
TIPC_NLA_NODE_ID, /* data */
TIPC_NLA_NODE_KEY, /* data */
__TIPC_NLA_NODE_MAX,
TIPC_NLA_NODE_MAX = __TIPC_NLA_NODE_MAX - 1

18
net/tipc/netlink.c
View File

@ -102,7 +102,11 @@ const struct nla_policy tipc_nl_link_policy[TIPC_NLA_LINK_MAX + 1] = {
const struct nla_policy tipc_nl_node_policy[TIPC_NLA_NODE_MAX + 1] = {
[TIPC_NLA_NODE_UNSPEC] = { .type = NLA_UNSPEC },
[TIPC_NLA_NODE_ADDR] = { .type = NLA_U32 },
[TIPC_NLA_NODE_UP] = { .type = NLA_FLAG }
[TIPC_NLA_NODE_UP] = { .type = NLA_FLAG },
[TIPC_NLA_NODE_ID] = { .type = NLA_BINARY,
.len = TIPC_NODEID_LEN},
[TIPC_NLA_NODE_KEY] = { .type = NLA_BINARY,
.len = TIPC_AEAD_KEY_SIZE_MAX},
};
/* Properties valid for media, bearer and link */
@ -257,6 +261,18 @@ static const struct genl_ops tipc_genl_v2_ops[] = {
.dumpit = tipc_udp_nl_dump_remoteip,
},
#endif
#ifdef CONFIG_TIPC_CRYPTO
{
.cmd = TIPC_NL_KEY_SET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = tipc_nl_node_set_key,
},
{
.cmd = TIPC_NL_KEY_FLUSH,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = tipc_nl_node_flush_key,
},
#endif
};
struct genl_family tipc_genl_family __ro_after_init = {

135
net/tipc/node.c
View File

@ -2760,6 +2760,141 @@ int tipc_nl_node_dump_monitor_peer(struct sk_buff *skb,
return skb->len;
}
#ifdef CONFIG_TIPC_CRYPTO
static int tipc_nl_retrieve_key(struct nlattr **attrs,
struct tipc_aead_key **key)
{
struct nlattr *attr = attrs[TIPC_NLA_NODE_KEY];
if (!attr)
return -ENODATA;
*key = (struct tipc_aead_key *)nla_data(attr);
if (nla_len(attr) < tipc_aead_key_size(*key))
return -EINVAL;
return 0;
}
static int tipc_nl_retrieve_nodeid(struct nlattr **attrs, u8 **node_id)
{
struct nlattr *attr = attrs[TIPC_NLA_NODE_ID];
if (!attr)
return -ENODATA;
if (nla_len(attr) < TIPC_NODEID_LEN)
return -EINVAL;
*node_id = (u8 *)nla_data(attr);
return 0;
}
int __tipc_nl_node_set_key(struct sk_buff *skb, struct genl_info *info)
{
struct nlattr *attrs[TIPC_NLA_NODE_MAX + 1];
struct net *net = sock_net(skb->sk);
struct tipc_net *tn = tipc_net(net);
struct tipc_node *n = NULL;
struct tipc_aead_key *ukey;
struct tipc_crypto *c;
u8 *id, *own_id;
int rc = 0;
if (!info->attrs[TIPC_NLA_NODE])
return -EINVAL;
rc = nla_parse_nested(attrs, TIPC_NLA_NODE_MAX,
info->attrs[TIPC_NLA_NODE],
tipc_nl_node_policy, info->extack);
if (rc)
goto exit;
own_id = tipc_own_id(net);
if (!own_id) {
rc = -EPERM;
goto exit;
}
rc = tipc_nl_retrieve_key(attrs, &ukey);
if (rc)
goto exit;
rc = tipc_aead_key_validate(ukey);
if (rc)
goto exit;
rc = tipc_nl_retrieve_nodeid(attrs, &id);
switch (rc) {
case -ENODATA:
/* Cluster key mode */
rc = tipc_crypto_key_init(tn->crypto_tx, ukey, CLUSTER_KEY);
break;
case 0:
/* Per-node key mode */
if (!memcmp(id, own_id, NODE_ID_LEN)) {
c = tn->crypto_tx;
} else {
n = tipc_node_find_by_id(net, id) ?:
tipc_node_create(net, 0, id, 0xffffu, 0, true);
if (unlikely(!n)) {
rc = -ENOMEM;
break;
}
c = n->crypto_rx;
}
rc = tipc_crypto_key_init(c, ukey, PER_NODE_KEY);
if (n)
tipc_node_put(n);
break;
default:
break;
}
exit:
return (rc < 0) ? rc : 0;
}
int tipc_nl_node_set_key(struct sk_buff *skb, struct genl_info *info)
{
int err;
rtnl_lock();
err = __tipc_nl_node_set_key(skb, info);
rtnl_unlock();
return err;
}
int __tipc_nl_node_flush_key(struct sk_buff *skb, struct genl_info *info)
{
struct net *net = sock_net(skb->sk);
struct tipc_net *tn = tipc_net(net);
struct tipc_node *n;
tipc_crypto_key_flush(tn->crypto_tx);
rcu_read_lock();
list_for_each_entry_rcu(n, &tn->node_list, list)
tipc_crypto_key_flush(n->crypto_rx);
rcu_read_unlock();
pr_info("All keys are flushed!\n");
return 0;
}
int tipc_nl_node_flush_key(struct sk_buff *skb, struct genl_info *info)
{
int err;
rtnl_lock();
err = __tipc_nl_node_flush_key(skb, info);
rtnl_unlock();
return err;
}
#endif
/**
* tipc_node_dump - dump TIPC node data
* @n: tipc node to be dumped

4
net/tipc/node.h
View File

@ -119,5 +119,9 @@ int tipc_nl_node_get_monitor(struct sk_buff *skb, struct genl_info *info);
int tipc_nl_node_dump_monitor(struct sk_buff *skb, struct netlink_callback *cb);
int tipc_nl_node_dump_monitor_peer(struct sk_buff *skb,
struct netlink_callback *cb);
#ifdef CONFIG_TIPC_CRYPTO
int tipc_nl_node_set_key(struct sk_buff *skb, struct genl_info *info);
int tipc_nl_node_flush_key(struct sk_buff *skb, struct genl_info *info);
#endif
void tipc_node_pre_cleanup_net(struct net *exit_net);
#endif