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tipc: add option to set rekeying for encryption

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As supported in kernel, the TIPC encryption rekeying can be tuned using
the netlink attribute - 'TIPC_NLA_NODE_REKEYING'. Now we add the
'rekeying' option correspondingly to the 'tipc node set key' command so
that user will be able to perform that tuning:

tipc node set key rekeying REKEYING

where the 'REKEYING' value can be:

INTERVAL              - Set rekeying interval (in minutes) [0: disable]
now                   - Trigger one (first) rekeying immediately

For example:
$ tipc node set key rekeying 60
$ tipc node set key rekeying now

The command's help menu is also updated with these descriptions for the
new command option.

Acked-by: Jon Maloy <jmaloy@redhat.com>
Signed-off-by: Tuong Lien <tuong.t.lien@dektech.com.au>
Signed-off-by: David Ahern <dsahern@gmail.com>
This commit is contained in:
Tuong Lien 2020-10-16 23:02:01 +07:00 committed by David Ahern
parent 5fb3681885
commit 2bf1ba5a5c
3 changed files with 39 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
tipc/cmdl.c
View File

@ -33,7 +33,7 @@ static const struct cmd *find_cmd(const struct cmd *cmds, char *str)
return match;
}
static struct opt *find_opt(struct opt *opts, char *str)
struct opt *find_opt(struct opt *opts, char *str)
{
struct opt *o;
struct opt *match = NULL;

1
tipc/cmdl.h
View File

@ -46,6 +46,7 @@ struct opt {
char *val;
};
struct opt *find_opt(struct opt *opts, char *str);
struct opt *get_opt(struct opt *opts, char *key);
bool has_opt(struct opt *opts, char *key);
int parse_opts(struct opt *opts, struct cmdl *cmdl);

47
tipc/node.c
View File

@ -160,7 +160,8 @@ static int cmd_node_set_nodeid(struct nlmsghdr *nlh, const struct cmd *cmd,
static void cmd_node_set_key_help(struct cmdl *cmdl)
{
fprintf(stderr,
"Usage: %s node set key KEY [algname ALGNAME] [PROPERTIES]\n\n"
"Usage: %s node set key KEY [algname ALGNAME] [PROPERTIES]\n"
" %s node set key rekeying REKEYING\n\n"
"KEY\n"
" Symmetric KEY & SALT as a composite ASCII or hex string (0x...) in form:\n"
" [KEY: 16, 24 or 32 octets][SALT: 4 octets]\n\n"
@ -170,11 +171,16 @@ static void cmd_node_set_key_help(struct cmdl *cmdl)
" master - Set KEY as a cluster master key\n"
" <empty> - Set KEY as a cluster key\n"
" nodeid NODEID - Set KEY as a per-node key for own or peer\n\n"
"REKEYING\n"
" INTERVAL - Set rekeying interval (in minutes) [0: disable]\n"
" now - Trigger one (first) rekeying immediately\n\n"
"EXAMPLES\n"
" %s node set key this_is_a_master_key master\n"
" %s node set key 0x746869735F69735F615F6B657931365F73616C74\n"
" %s node set key this_is_a_key16_salt algname \"gcm(aes)\" nodeid 1001002\n\n",
cmdl->argv[0], cmdl->argv[0], cmdl->argv[0], cmdl->argv[0]);
" %s node set key this_is_a_key16_salt algname \"gcm(aes)\" nodeid 1001002\n"
" %s node set key rekeying 600\n\n",
cmdl->argv[0], cmdl->argv[0], cmdl->argv[0], cmdl->argv[0],
cmdl->argv[0], cmdl->argv[0]);
}
static int cmd_node_set_key(struct nlmsghdr *nlh, const struct cmd *cmd,
@ -190,12 +196,15 @@ static int cmd_node_set_key(struct nlmsghdr *nlh, const struct cmd *cmd,
{ "algname", OPT_KEYVAL, NULL },
{ "nodeid", OPT_KEYVAL, NULL },
{ "master", OPT_KEY, NULL },
{ "rekeying", OPT_KEYVAL, NULL },
{ NULL }
};
struct nlattr *nest;
struct opt *opt_algname, *opt_nodeid, *opt_master;
struct opt *opt_algname, *opt_nodeid, *opt_master, *opt_rekeying;
char buf[MNL_SOCKET_BUFFER_SIZE];
uint8_t id[TIPC_NODEID_LEN] = {0,};
uint32_t rekeying = 0;
bool has_key = false;
int keysize;
char *str;
@ -204,17 +213,31 @@ static int cmd_node_set_key(struct nlmsghdr *nlh, const struct cmd *cmd,
return -EINVAL;
}
/* Check if command starts with opts i.e. "rekeying" opt without key */
if (find_opt(opts, cmdl->argv[cmdl->optind]))
goto get_ops;
/* Get user key */
has_key = true;
str = shift_cmdl(cmdl);
if (str2key(str, &input.key)) {
fprintf(stderr, "error, invalid key input\n");
return -EINVAL;
}
get_ops:
if (parse_opts(opts, cmdl) < 0)
return -EINVAL;
/* Get rekeying time */
opt_rekeying = get_opt(opts, "rekeying");
if (opt_rekeying) {
if (!strcmp(opt_rekeying->val, "now"))
rekeying = TIPC_REKEYING_NOW;
else
rekeying = atoi(opt_rekeying->val);
}
/* Get algorithm name, default: "gcm(aes)" */
opt_algname = get_opt(opts, "algname");
if (!opt_algname)
@ -246,12 +269,16 @@ static int cmd_node_set_key(struct nlmsghdr *nlh, const struct cmd *cmd,
}
nest = mnl_attr_nest_start(nlh, TIPC_NLA_NODE);
keysize = tipc_aead_key_size(&input.key);
mnl_attr_put(nlh, TIPC_NLA_NODE_KEY, keysize, &input.key);
if (opt_nodeid)
mnl_attr_put(nlh, TIPC_NLA_NODE_ID, TIPC_NODEID_LEN, id);
if (opt_master)
mnl_attr_put(nlh, TIPC_NLA_NODE_KEY_MASTER, 0, NULL);
if (has_key) {
keysize = tipc_aead_key_size(&input.key);
mnl_attr_put(nlh, TIPC_NLA_NODE_KEY, keysize, &input.key);
if (opt_nodeid)
mnl_attr_put(nlh, TIPC_NLA_NODE_ID, TIPC_NODEID_LEN, id);
if (opt_master)
mnl_attr_put(nlh, TIPC_NLA_NODE_KEY_MASTER, 0, NULL);
}
if (opt_rekeying)
mnl_attr_put_u32(nlh, TIPC_NLA_NODE_REKEYING, rekeying);
mnl_attr_nest_end(nlh, nest);
return msg_doit(nlh, NULL, NULL);