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Message-Id: <20191121034646.16737-1-tuong.t.lien@dektech.com.au>
Date: Thu, 21 Nov 2019 10:46:46 +0700
From: Tuong Lien <tuong.t.lien@...tech.com.au>
To: dsahern@...il.com, jon.maloy@...csson.com, maloy@...jonn.com,
ying.xue@...driver.com, netdev@...r.kernel.org
Cc: tipc-discussion@...ts.sourceforge.net
Subject: [iproute2-next] tipc: add new commands to set TIPC AEAD key
Two new commands are added as part of 'tipc node' command:
$tipc node set key KEY [algname ALGNAME] [nodeid NODEID]
$tipc node flush key
which enable user to set and remove AEAD keys in kernel TIPC (requires
the kernel option - 'TIPC_CRYPTO').
For the 'set key' command, the given 'nodeid' parameter decides the
mode to be applied to the key, particularly:
- If NODEID is empty, the key is a 'cluster' key which will be used for
all message encryption/decryption from/to the node (i.e. both TX & RX).
The same key will be set in the other nodes.
- If NODEID is own node, the key is used for message encryption (TX)
from the node. Whereas, if NODEID is a peer node, the key is for
message decryption (RX) from that peer node. This is the 'per-node-key'
mode that each nodes in the cluster has its specific (TX) key.
Acked-by: Ying Xue <ying.xue@...driver.com>
Acked-by: Jon Maloy <jon.maloy@...csson.com>
Signed-off-by: Tuong Lien <tuong.t.lien@...tech.com.au>
---
include/uapi/linux/tipc.h | 21 ++++++
include/uapi/linux/tipc_netlink.h | 4 ++
tipc/misc.c | 38 +++++++++++
tipc/misc.h | 1 +
tipc/node.c | 133 +++++++++++++++++++++++++++++++++++++-
5 files changed, 195 insertions(+), 2 deletions(-)
diff --git a/include/uapi/linux/tipc.h b/include/uapi/linux/tipc.h
index 0f6f28b2..bd34151f 100644
--- a/include/uapi/linux/tipc.h
+++ b/include/uapi/linux/tipc.h
@@ -233,6 +233,27 @@ struct tipc_sioc_nodeid_req {
char node_id[TIPC_NODEID_LEN];
};
+/*
+ * TIPC Crypto, AEAD
+ */
+#define TIPC_AEAD_ALG_NAME (32)
+
+struct tipc_aead_key {
+ char alg_name[TIPC_AEAD_ALG_NAME];
+ unsigned int keylen; /* in bytes */
+ char key[];
+};
+
+#define TIPC_AEAD_KEYLEN_MIN (16 + 4)
+#define TIPC_AEAD_KEYLEN_MAX (32 + 4)
+#define TIPC_AEAD_KEY_SIZE_MAX (sizeof(struct tipc_aead_key) + \
+ TIPC_AEAD_KEYLEN_MAX)
+
+static inline int tipc_aead_key_size(struct tipc_aead_key *key)
+{
+ return sizeof(*key) + key->keylen;
+}
+
/* The macros and functions below are deprecated:
*/
diff --git a/include/uapi/linux/tipc_netlink.h b/include/uapi/linux/tipc_netlink.h
index efb958fd..6c2194ab 100644
--- a/include/uapi/linux/tipc_netlink.h
+++ b/include/uapi/linux/tipc_netlink.h
@@ -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
diff --git a/tipc/misc.c b/tipc/misc.c
index e4b1cd0c..1daf3072 100644
--- a/tipc/misc.c
+++ b/tipc/misc.c
@@ -98,6 +98,44 @@ int str2nodeid(char *str, uint8_t *id)
return 0;
}
+int str2key(char *str, struct tipc_aead_key *key)
+{
+ int len = strlen(str);
+ int ishex = 0;
+ int i;
+
+ /* Check if the input is a hex string (i.e. 0x...) */
+ if (len > 2 && strncmp(str, "0x", 2) == 0) {
+ ishex = is_hex(str + 2, len - 2 - 1);
+ if (ishex) {
+ len -= 2;
+ str += 2;
+ }
+ }
+
+ /* Obtain key: */
+ if (!ishex) {
+ key->keylen = len;
+ memcpy(key->key, str, len);
+ } else {
+ /* Convert hex string to key */
+ key->keylen = (len + 1) / 2;
+ for (i = 0; i < key->keylen; i++) {
+ if (i == 0 && len % 2 != 0) {
+ if (sscanf(str, "%1hhx", &key->key[0]) != 1)
+ return -1;
+ str += 1;
+ continue;
+ }
+ if (sscanf(str, "%2hhx", &key->key[i]) != 1)
+ return -1;
+ str += 2;
+ }
+ }
+
+ return 0;
+}
+
void nodeid2str(uint8_t *id, char *str)
{
int i;
diff --git a/tipc/misc.h b/tipc/misc.h
index ff2f31f1..59309f68 100644
--- a/tipc/misc.h
+++ b/tipc/misc.h
@@ -18,5 +18,6 @@ uint32_t str2addr(char *str);
int str2nodeid(char *str, uint8_t *id);
void nodeid2str(uint8_t *id, char *str);
void hash2nodestr(uint32_t hash, char *str);
+int str2key(char *str, struct tipc_aead_key *key);
#endif
diff --git a/tipc/node.c b/tipc/node.c
index 2fec6753..6c796bfb 100644
--- a/tipc/node.c
+++ b/tipc/node.c
@@ -157,6 +157,111 @@ static int cmd_node_set_nodeid(struct nlmsghdr *nlh, const struct cmd *cmd,
return msg_doit(nlh, NULL, NULL);
}
+static void cmd_node_set_key_help(struct cmdl *cmdl)
+{
+ fprintf(stderr,
+ "Usage: %s node set key KEY [algname ALGNAME] [nodeid NODEID]\n\n"
+ "PROPERTIES\n"
+ " KEY - Symmetric KEY & SALT as a normal or hex string\n"
+ " that consists of two parts:\n"
+ " [KEY: 16, 24 or 32 octets][SALT: 4 octets]\n\n"
+ " algname ALGNAME - Default: \"gcm(aes)\"\n\n"
+ " nodeid NODEID - Own or peer node identity to which the key will\n"
+ " be attached. If not present, the key is a cluster\n"
+ " key!\n\n"
+ "EXAMPLES\n"
+ " %s node set key this_is_a_key16_salt algname \"gcm(aes)\" nodeid node1\n"
+ " %s node set key 0x746869735F69735F615F6B657931365F73616C74 nodeid node2\n\n",
+ cmdl->argv[0], cmdl->argv[0], cmdl->argv[0]);
+}
+
+static int cmd_node_set_key(struct nlmsghdr *nlh, const struct cmd *cmd,
+ struct cmdl *cmdl, void *data)
+{
+ struct {
+ struct tipc_aead_key key;
+ char mem[TIPC_AEAD_KEYLEN_MAX + 1];
+ } input = {};
+ struct opt opts[] = {
+ { "algname", OPT_KEYVAL, NULL },
+ { "nodeid", OPT_KEYVAL, NULL },
+ { NULL }
+ };
+ struct nlattr *nest;
+ struct opt *opt_algname, *opt_nodeid;
+ char buf[MNL_SOCKET_BUFFER_SIZE];
+ uint8_t id[TIPC_NODEID_LEN] = {0,};
+ int keysize;
+ char *str;
+
+ if (help_flag) {
+ (cmd->help)(cmdl);
+ return -EINVAL;
+ }
+
+ if (cmdl->optind >= cmdl->argc) {
+ fprintf(stderr, "error, missing key\n");
+ return -EINVAL;
+ }
+
+ /* Get user key */
+ str = shift_cmdl(cmdl);
+ if (str2key(str, &input.key)) {
+ fprintf(stderr, "error, invalid key input\n");
+ return -EINVAL;
+ }
+
+ if (parse_opts(opts, cmdl) < 0)
+ return -EINVAL;
+
+ /* Get algorithm name, default: "gcm(aes)" */
+ opt_algname = get_opt(opts, "algname");
+ if (!opt_algname)
+ strcpy(input.key.alg_name, "gcm(aes)");
+ else
+ strcpy(input.key.alg_name, opt_algname->val);
+
+ /* Get node identity */
+ opt_nodeid = get_opt(opts, "nodeid");
+ if (opt_nodeid && str2nodeid(opt_nodeid->val, id)) {
+ fprintf(stderr, "error, invalid node identity\n");
+ return -EINVAL;
+ }
+
+ /* Init & do the command */
+ nlh = msg_init(buf, TIPC_NL_KEY_SET);
+ if (!nlh) {
+ fprintf(stderr, "error, message initialisation failed\n");
+ return -1;
+ }
+ 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);
+ mnl_attr_nest_end(nlh, nest);
+ return msg_doit(nlh, NULL, NULL);
+}
+
+static int cmd_node_flush_key(struct nlmsghdr *nlh, const struct cmd *cmd,
+ struct cmdl *cmdl, void *data)
+{
+ char buf[MNL_SOCKET_BUFFER_SIZE];
+
+ if (help_flag) {
+ (cmd->help)(cmdl);
+ return -EINVAL;
+ }
+
+ /* Init & do the command */
+ nlh = msg_init(buf, TIPC_NL_KEY_FLUSH);
+ if (!nlh) {
+ fprintf(stderr, "error, message initialisation failed\n");
+ return -1;
+ }
+ return msg_doit(nlh, NULL, NULL);
+}
+
static int nodeid_get_cb(const struct nlmsghdr *nlh, void *data)
{
struct nlattr *info[TIPC_NLA_MAX + 1] = {};
@@ -270,13 +375,34 @@ static int cmd_node_set_netid(struct nlmsghdr *nlh, const struct cmd *cmd,
return msg_doit(nlh, NULL, NULL);
}
+static void cmd_node_flush_help(struct cmdl *cmdl)
+{
+ fprintf(stderr,
+ "Usage: %s node flush PROPERTY\n\n"
+ "PROPERTIES\n"
+ " key - Flush all symmetric-keys\n",
+ cmdl->argv[0]);
+}
+
+static int cmd_node_flush(struct nlmsghdr *nlh, const struct cmd *cmd,
+ struct cmdl *cmdl, void *data)
+{
+ const struct cmd cmds[] = {
+ { "key", cmd_node_flush_key, NULL },
+ { NULL }
+ };
+
+ return run_cmd(nlh, cmd, cmds, cmdl, NULL);
+}
+
static void cmd_node_set_help(struct cmdl *cmdl)
{
fprintf(stderr,
"Usage: %s node set PROPERTY\n\n"
"PROPERTIES\n"
" identity NODEID - Set node identity\n"
- " clusterid CLUSTERID - Set local cluster id\n",
+ " clusterid CLUSTERID - Set local cluster id\n"
+ " key PROPERTY - Set symmetric-key\n",
cmdl->argv[0]);
}
@@ -288,6 +414,7 @@ static int cmd_node_set(struct nlmsghdr *nlh, const struct cmd *cmd,
{ "identity", cmd_node_set_nodeid, NULL },
{ "netid", cmd_node_set_netid, NULL },
{ "clusterid", cmd_node_set_netid, NULL },
+ { "key", cmd_node_set_key, cmd_node_set_key_help },
{ NULL }
};
@@ -325,7 +452,8 @@ void cmd_node_help(struct cmdl *cmdl)
"COMMANDS\n"
" list - List remote nodes\n"
" get - Get local node parameters\n"
- " set - Set local node parameters\n",
+ " set - Set local node parameters\n"
+ " flush - Flush local node parameters\n",
cmdl->argv[0]);
}
@@ -336,6 +464,7 @@ int cmd_node(struct nlmsghdr *nlh, const struct cmd *cmd, struct cmdl *cmdl,
{ "list", cmd_node_list, NULL },
{ "get", cmd_node_get, cmd_node_get_help },
{ "set", cmd_node_set, cmd_node_set_help },
+ { "flush", cmd_node_flush, cmd_node_flush_help},
{ NULL }
};
--
2.13.7
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