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[tipc-discussion] [iproute2-next 2/2] tipc: add option to set rekeying for encryption
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From: Tuong L. <tuo...@de...> - 2020-10-11 09:14:57
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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.
Signed-off-by: Tuong Lien <tuo...@de...>
---
tipc/cmdl.c | 2 +-
tipc/cmdl.h | 1 +
tipc/node.c | 47 +++++++++++++++++++++++++++++++++++++----------
3 files changed, 39 insertions(+), 11 deletions(-)
diff --git a/tipc/cmdl.c b/tipc/cmdl.c
index f2f259cc..981e268e 100644
--- a/tipc/cmdl.c
+++ b/tipc/cmdl.c
@@ -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;
diff --git a/tipc/cmdl.h b/tipc/cmdl.h
index 03db3599..dcade362 100644
--- a/tipc/cmdl.h
+++ b/tipc/cmdl.h
@@ -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);
diff --git a/tipc/node.c b/tipc/node.c
index 1ff0baa4..05246013 100644
--- a/tipc/node.c
+++ b/tipc/node.c
@@ -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);
--
2.26.2
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