@@ -165,6 +165,7 @@ enum {
TIPC_NLA_NODE_UP, /* flag */
TIPC_NLA_NODE_ID, /* data */
TIPC_NLA_NODE_KEY, /* data */
+ TIPC_NLA_NODE_KEY_MASTER, /* flag */
__TIPC_NLA_NODE_MAX,
TIPC_NLA_NODE_MAX = __TIPC_NLA_NODE_MAX - 1
@@ -38,6 +38,7 @@
#include <crypto/aes.h>
#include "crypto.h"
+#define TIPC_TX_GRACE_PERIOD msecs_to_jiffies(5000) /* 5s */
#define TIPC_TX_LASTING_TIME msecs_to_jiffies(10000) /* 10s */
#define TIPC_RX_ACTIVE_LIM msecs_to_jiffies(3000) /* 3s */
#define TIPC_RX_PASSIVE_LIM msecs_to_jiffies(15000) /* 15s */
@@ -49,9 +50,9 @@
* TIPC Key ids
*/
enum {
- KEY_UNUSED = 0,
- KEY_MIN,
- KEY_1 = KEY_MIN,
+ KEY_MASTER = 0,
+ KEY_MIN = KEY_MASTER,
+ KEY_1 = 1,
KEY_2,
KEY_3,
KEY_MAX = KEY_3,
@@ -166,27 +167,36 @@ struct tipc_crypto_stats {
* @aead: array of pointers to AEAD keys for encryption/decryption
* @peer_rx_active: replicated peer RX active key index
* @key: the key states
- * @working: the crypto is working or not
* @stats: the crypto statistics
* @name: the crypto name
* @sndnxt: the per-peer sndnxt (TX)
* @timer1: general timer 1 (jiffies)
* @timer2: general timer 2 (jiffies)
+ * @working: the crypto is working or not
+ * @key_master: flag indicates if master key exists
+ * @legacy_user: flag indicates if a peer joins w/o master key (for bwd comp.)
* @lock: tipc_key lock
*/
struct tipc_crypto {
struct net *net;
struct tipc_node *node;
- struct tipc_aead __rcu *aead[KEY_MAX + 1]; /* key[0] is UNUSED */
+ struct tipc_aead __rcu *aead[KEY_MAX + 1];
atomic_t peer_rx_active;
struct tipc_key key;
- u8 working:1;
struct tipc_crypto_stats __percpu *stats;
char name[48];
atomic64_t sndnxt ____cacheline_aligned;
unsigned long timer1;
unsigned long timer2;
+ union {
+ struct {
+ u8 working:1;
+ u8 key_master:1;
+ u8 legacy_user:1;
+ };
+ u8 flags;
+ };
spinlock_t lock; /* crypto lock */
} ____cacheline_aligned;
@@ -236,13 +246,19 @@ static inline void tipc_crypto_key_set_state(struct tipc_crypto *c,
u8 new_active,
u8 new_pending);
static int tipc_crypto_key_attach(struct tipc_crypto *c,
- struct tipc_aead *aead, u8 pos);
+ struct tipc_aead *aead, u8 pos,
+ bool master_key);
static bool tipc_crypto_key_try_align(struct tipc_crypto *rx, u8 new_pending);
static struct tipc_aead *tipc_crypto_key_pick_tx(struct tipc_crypto *tx,
struct tipc_crypto *rx,
- struct sk_buff *skb);
+ struct sk_buff *skb,
+ u8 tx_key);
static void tipc_crypto_key_synch(struct tipc_crypto *rx, struct sk_buff *skb);
static int tipc_crypto_key_revoke(struct net *net, u8 tx_key);
+static inline void tipc_crypto_clone_msg(struct net *net, struct sk_buff *_skb,
+ struct tipc_bearer *b,
+ struct tipc_media_addr *dst,
+ struct tipc_node *__dnode, u8 type);
static void tipc_crypto_rcv_complete(struct net *net, struct tipc_aead *aead,
struct tipc_bearer *b,
struct sk_buff **skb, int err);
@@ -939,8 +955,6 @@ bool tipc_ehdr_validate(struct sk_buff *skb)
return false;
if (unlikely(skb->len <= ehsz + TIPC_AES_GCM_TAG_SIZE))
return false;
- if (unlikely(!ehdr->tx_key))
- return false;
return true;
}
@@ -993,6 +1007,8 @@ static int tipc_ehdr_build(struct net *net, struct tipc_aead *aead,
ehdr->tx_key = tx_key;
ehdr->destined = (__rx) ? 1 : 0;
ehdr->rx_key_active = (__rx) ? __rx->key.active : 0;
+ ehdr->rx_nokey = (__rx) ? !__rx->key.keys : 0;
+ ehdr->master_key = aead->crypto->key_master;
ehdr->reserved_1 = 0;
ehdr->reserved_2 = 0;
@@ -1035,6 +1051,7 @@ static inline void tipc_crypto_key_set_state(struct tipc_crypto *c,
* @c: TIPC crypto to which new key is attached
* @ukey: the user key
* @mode: the key mode (CLUSTER_KEY or PER_NODE_KEY)
+ * @master_key: specify this is a cluster master key
*
* A new TIPC AEAD key will be allocated and initiated with the specified user
* key, then attached to the TIPC crypto.
@@ -1042,7 +1059,7 @@ static inline void tipc_crypto_key_set_state(struct tipc_crypto *c,
* Return: new key id in case of success, otherwise: < 0
*/
int tipc_crypto_key_init(struct tipc_crypto *c, struct tipc_aead_key *ukey,
- u8 mode)
+ u8 mode, bool master_key)
{
struct tipc_aead *aead = NULL;
int rc = 0;
@@ -1055,7 +1072,7 @@ int tipc_crypto_key_init(struct tipc_crypto *c, struct tipc_aead_key *ukey,
}
/* Attach it to the crypto */
- rc = tipc_crypto_key_attach(c, aead, 0);
+ rc = tipc_crypto_key_attach(c, aead, 0, master_key);
if (rc < 0) {
pr_err("%s: unable to attach key, err %d\n", c->name, rc);
tipc_aead_free(&aead->rcu);
@@ -1071,11 +1088,13 @@ int tipc_crypto_key_init(struct tipc_crypto *c, struct tipc_aead_key *ukey,
* @c: TIPC crypto to which the new AEAD key is attached
* @aead: the new AEAD key pointer
* @pos: desired slot in the crypto key array, = 0 if any!
+ * @master_key: specify this is a cluster master key
*
* Return: new key id in case of success, otherwise: -EBUSY
*/
static int tipc_crypto_key_attach(struct tipc_crypto *c,
- struct tipc_aead *aead, u8 pos)
+ struct tipc_aead *aead, u8 pos,
+ bool master_key)
{
struct tipc_key key;
int rc = -EBUSY;
@@ -1083,6 +1102,10 @@ static int tipc_crypto_key_attach(struct tipc_crypto *c,
spin_lock_bh(&c->lock);
key = c->key;
+ if (master_key) {
+ new_key = KEY_MASTER;
+ goto attach;
+ }
if (key.active && key.passive)
goto exit;
if (key.pending) {
@@ -1114,8 +1137,7 @@ static int tipc_crypto_key_attach(struct tipc_crypto *c,
tipc_crypto_key_set_state(c, key.passive, key.active,
key.pending);
c->working = 1;
- c->timer1 = jiffies;
- c->timer2 = jiffies;
+ c->key_master |= master_key;
rc = new_key;
exit:
@@ -1128,7 +1150,7 @@ void tipc_crypto_key_flush(struct tipc_crypto *c)
int k;
spin_lock_bh(&c->lock);
- c->working = 0;
+ c->flags = 0;
tipc_crypto_key_set_state(c, 0, 0, 0);
for (k = KEY_MIN; k <= KEY_MAX; k++)
tipc_crypto_key_detach(c->aead[k], &c->lock);
@@ -1204,6 +1226,7 @@ static bool tipc_crypto_key_try_align(struct tipc_crypto *rx, u8 new_pending)
* @tx: TX crypto handle
* @rx: RX crypto handle (can be NULL)
* @skb: the message skb which will be decrypted later
+ * @tx_key: peer TX key id
*
* This function looks up the existing TX keys and pick one which is suitable
* for the message decryption, that must be a cluster key and not used before
@@ -1213,7 +1236,8 @@ static bool tipc_crypto_key_try_align(struct tipc_crypto *rx, u8 new_pending)
*/
static struct tipc_aead *tipc_crypto_key_pick_tx(struct tipc_crypto *tx,
struct tipc_crypto *rx,
- struct sk_buff *skb)
+ struct sk_buff *skb,
+ u8 tx_key)
{
struct tipc_skb_cb *skb_cb = TIPC_SKB_CB(skb);
struct tipc_aead *aead = NULL;
@@ -1232,6 +1256,10 @@ static struct tipc_aead *tipc_crypto_key_pick_tx(struct tipc_crypto *tx,
/* Pick one TX key */
spin_lock(&tx->lock);
+ if (tx_key == KEY_MASTER) {
+ aead = tipc_aead_rcu_ptr(tx->aead[KEY_MASTER], &tx->lock);
+ goto done;
+ }
do {
k = (i == 0) ? key.pending :
((i == 1) ? key.active : key.passive);
@@ -1251,9 +1279,12 @@ static struct tipc_aead *tipc_crypto_key_pick_tx(struct tipc_crypto *tx,
skb->next = skb_clone(skb, GFP_ATOMIC);
if (unlikely(!skb->next))
pr_warn("Failed to clone skb for next round if any\n");
- WARN_ON(!refcount_inc_not_zero(&aead->refcnt));
break;
} while (++i < 3);
+
+done:
+ if (likely(aead))
+ WARN_ON(!refcount_inc_not_zero(&aead->refcnt));
spin_unlock(&tx->lock);
return aead;
@@ -1268,6 +1299,9 @@ static struct tipc_aead *tipc_crypto_key_pick_tx(struct tipc_crypto *tx,
* has changed, so the number of TX keys' users on this node are increased and
* decreased correspondingly.
*
+ * It also considers if peer has no key, then we need to make own master key
+ * (if any) taking over i.e. starting grace period.
+ *
* The "per-peer" sndnxt is also reset when the peer key has switched.
*/
static void tipc_crypto_key_synch(struct tipc_crypto *rx, struct sk_buff *skb)
@@ -1278,11 +1312,23 @@ static void tipc_crypto_key_synch(struct tipc_crypto *rx, struct sk_buff *skb)
u32 self = tipc_own_addr(rx->net);
u8 cur, new;
- /* Ensure this message is destined to us first */
+ /* Update RX 'key_master' flag according to peer, also mark "legacy" if
+ * a peer has no master key.
+ */
+ rx->key_master = ehdr->master_key;
+ if (!rx->key_master)
+ tx->legacy_user = 1;
+
+ /* For later cases, apply only if message is destined to this node */
if (!ehdr->destined || msg_short(hdr) || msg_destnode(hdr) != self)
return;
- /* Peer RX active key has changed, let's update own TX users */
+ /* Case 1: Peer has no keys, let's make master key take over */
+ if (ehdr->rx_nokey)
+ /* Set or extend grace period */
+ tx->timer2 = jiffies;
+
+ /* Case 2: Peer RX active key has changed, let's update own TX users */
cur = atomic_read(&rx->peer_rx_active);
new = ehdr->rx_key_active;
if (tx->key.keys &&
@@ -1340,7 +1386,7 @@ int tipc_crypto_start(struct tipc_crypto **crypto, struct net *net,
return -ENOMEM;
}
- c->working = 0;
+ c->flags = 0;
c->net = net;
c->node = node;
tipc_crypto_key_set_state(c, 0, 0, 0);
@@ -1475,6 +1521,12 @@ void tipc_crypto_timeout(struct tipc_crypto *rx)
s5:
spin_unlock(&rx->lock);
+ /* Relax it here, the flag will be set again if it really is, but only
+ * when we are not in grace period for safety!
+ */
+ if (time_after(jiffies, tx->timer2 + TIPC_TX_GRACE_PERIOD))
+ tx->legacy_user = 0;
+
/* Limit max_tfms & do debug commands if needed */
if (likely(sysctl_tipc_max_tfms <= TIPC_MAX_TFMS_LIM))
return;
@@ -1484,6 +1536,22 @@ void tipc_crypto_timeout(struct tipc_crypto *rx)
tipc_crypto_do_cmd(rx->net, cmd);
}
+static inline void tipc_crypto_clone_msg(struct net *net, struct sk_buff *_skb,
+ struct tipc_bearer *b,
+ struct tipc_media_addr *dst,
+ struct tipc_node *__dnode, u8 type)
+{
+ struct sk_buff *skb;
+
+ skb = skb_clone(_skb, GFP_ATOMIC);
+ if (skb) {
+ TIPC_SKB_CB(skb)->xmit_type = type;
+ tipc_crypto_xmit(net, &skb, b, dst, __dnode);
+ if (skb)
+ b->media->send_msg(net, skb, b, dst);
+ }
+}
+
/**
* tipc_crypto_xmit - Build & encrypt TIPC message for xmit
* @net: struct net
@@ -1493,7 +1561,8 @@ void tipc_crypto_timeout(struct tipc_crypto *rx)
* @__dnode: destination node for reference if any
*
* First, build an encryption message header on the top of the message, then
- * encrypt the original TIPC message by using the active or pending TX key.
+ * encrypt the original TIPC message by using the pending, master or active
+ * key with this preference order.
* If the encryption is successful, the encrypted skb is returned directly or
* via the callback.
* Otherwise, the skb is freed!
@@ -1516,46 +1585,63 @@ int tipc_crypto_xmit(struct net *net, struct sk_buff **skb,
struct tipc_msg *hdr = buf_msg(*skb);
struct tipc_key key = tx->key;
struct tipc_aead *aead = NULL;
- struct sk_buff *_skb;
- int rc = -ENOKEY;
u32 user = msg_user(hdr);
- u8 tx_key;
+ u32 type = msg_type(hdr);
+ int rc = -ENOKEY;
+ u8 tx_key = 0;
/* No encryption? */
if (!tx->working)
return 0;
- /* Try with the pending key if available and:
- * 1) This is the only choice (i.e. no active key) or;
- * 2) Peer has switched to this key (unicast only) or;
- * 3) It is time to do a pending key probe;
- */
+ /* Pending key if peer has active on it or probing time */
if (unlikely(key.pending)) {
tx_key = key.pending;
- if (!key.active)
+ if (!tx->key_master && !key.active)
goto encrypt;
if (__rx && atomic_read(&__rx->peer_rx_active) == tx_key)
goto encrypt;
- if (TIPC_SKB_CB(*skb)->probe) {
+ if (TIPC_SKB_CB(*skb)->xmit_type == SKB_PROBING) {
pr_debug("%s: probing for key[%d]\n", tx->name,
key.pending);
goto encrypt;
}
- if (user == LINK_CONFIG || user == LINK_PROTOCOL) {
- _skb = skb_clone(*skb, GFP_ATOMIC);
- if (_skb) {
- TIPC_SKB_CB(_skb)->probe = 1;
- tipc_crypto_xmit(net, &_skb, b, dst, __dnode);
- if (_skb)
- b->media->send_msg(net, _skb, b, dst);
+ if (user == LINK_CONFIG || user == LINK_PROTOCOL)
+ tipc_crypto_clone_msg(net, *skb, b, dst, __dnode,
+ SKB_PROBING);
+ }
+
+ /* Master key if this is a *vital* message or in grace period */
+ if (tx->key_master) {
+ tx_key = KEY_MASTER;
+ if (!key.active)
+ goto encrypt;
+ if (TIPC_SKB_CB(*skb)->xmit_type == SKB_GRACING) {
+ pr_debug("%s: gracing for msg (%d %d)\n", tx->name,
+ user, type);
+ goto encrypt;
+ }
+ if (user == LINK_CONFIG ||
+ (user == LINK_PROTOCOL && type == RESET_MSG) ||
+ time_before(jiffies, tx->timer2 + TIPC_TX_GRACE_PERIOD)) {
+ if (__rx && __rx->key_master &&
+ !atomic_read(&__rx->peer_rx_active))
+ goto encrypt;
+ if (!__rx) {
+ if (likely(!tx->legacy_user))
+ goto encrypt;
+ tipc_crypto_clone_msg(net, *skb, b, dst,
+ __dnode, SKB_GRACING);
}
}
}
+
/* Else, use the active key if any */
if (likely(key.active)) {
tx_key = key.active;
goto encrypt;
}
+
goto exit;
encrypt:
@@ -1621,15 +1707,16 @@ int tipc_crypto_rcv(struct net *net, struct tipc_crypto *rx,
struct tipc_aead *aead = NULL;
struct tipc_key key;
int rc = -ENOKEY;
- u8 tx_key = 0;
+ u8 tx_key;
+
+ tx_key = ((struct tipc_ehdr *)(*skb)->data)->tx_key;
/* New peer?
* Let's try with TX key (i.e. cluster mode) & verify the skb first!
*/
- if (unlikely(!rx))
+ if (unlikely(!rx || tx_key == KEY_MASTER))
goto pick_tx;
- tx_key = ((struct tipc_ehdr *)(*skb)->data)->tx_key;
/* Pick RX key according to TX key if any */
key = rx->key;
if (tx_key == key.active || tx_key == key.pending ||
@@ -1642,7 +1729,7 @@ int tipc_crypto_rcv(struct net *net, struct tipc_crypto *rx,
pick_tx:
/* No key suitable? Try to pick one from TX... */
- aead = tipc_crypto_key_pick_tx(tx, rx, *skb);
+ aead = tipc_crypto_key_pick_tx(tx, rx, *skb, tx_key);
if (aead)
goto decrypt;
goto exit;
@@ -1724,9 +1811,12 @@ static void tipc_crypto_rcv_complete(struct net *net, struct tipc_aead *aead,
goto free_skb;
}
+ /* Ignore cloning if it was TX master key */
+ if (ehdr->tx_key == KEY_MASTER)
+ goto rcv;
if (tipc_aead_clone(&tmp, aead) < 0)
goto rcv;
- if (tipc_crypto_key_attach(rx, tmp, ehdr->tx_key) < 0) {
+ if (tipc_crypto_key_attach(rx, tmp, ehdr->tx_key, false) < 0) {
tipc_aead_free(&tmp->rcu);
goto rcv;
}
@@ -1742,10 +1832,10 @@ static void tipc_crypto_rcv_complete(struct net *net, struct tipc_aead *aead,
/* Set the RX key's user */
tipc_aead_users_set(aead, 1);
-rcv:
/* Mark this point, RX works */
rx->timer1 = jiffies;
+rcv:
/* Remove ehdr & auth. tag prior to tipc_rcv() */
ehdr = (struct tipc_ehdr *)(*skb)->data;
@@ -1867,14 +1957,24 @@ static char *tipc_crypto_key_dump(struct tipc_crypto *c, char *buf)
char *s;
for (k = KEY_MIN; k <= KEY_MAX; k++) {
- if (k == key.passive)
- s = "PAS";
- else if (k == key.active)
- s = "ACT";
- else if (k == key.pending)
- s = "PEN";
- else
- s = "-";
+ if (k == KEY_MASTER) {
+ if (is_rx(c))
+ continue;
+ if (time_before(jiffies,
+ c->timer2 + TIPC_TX_GRACE_PERIOD))
+ s = "ACT";
+ else
+ s = "PAS";
+ } else {
+ if (k == key.passive)
+ s = "PAS";
+ else if (k == key.active)
+ s = "ACT";
+ else if (k == key.pending)
+ s = "PEN";
+ else
+ s = "-";
+ }
i += scnprintf(buf + i, 200 - i, "\tKey%d: %s", k, s);
rcu_read_lock();
@@ -74,7 +74,7 @@ extern int sysctl_tipc_max_tfms __read_mostly;
* 3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0
* 1 0 9 8 7 6 5 4|3 2 1 0 9 8 7 6|5 4 3 2 1 0 9 8|7 6 5 4 3 2 1 0
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * w0:|Ver=7| User |D|TX |RX |K| Rsvd |
+ * w0:|Ver=7| User |D|TX |RX |K|M|N| Rsvd |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* w1:| Seqno |
* w2:| (8 octets) |
@@ -101,6 +101,9 @@ extern int sysctl_tipc_max_tfms __read_mostly;
* RX : Currently RX active key corresponding to the destination
* node's TX key (when the "D" bit is set)
* K : Keep-alive bit (for RPS, LINK_PROTOCOL/STATE_MSG only)
+ * M : Bit indicates if sender has master key
+ * N : Bit indicates if sender has no RX keys corresponding to the
+ * receiver's TX (when the "D" bit is set)
* Rsvd : Reserved bit, field
* Word1-2:
* Seqno : The 64-bit sequence number of the encrypted message, also
@@ -117,7 +120,9 @@ struct tipc_ehdr {
__u8 destined:1,
user:4,
version:3;
- __u8 reserved_1:3,
+ __u8 reserved_1:1,
+ rx_nokey:1,
+ master_key:1,
keepalive:1,
rx_key_active:2,
tx_key:2;
@@ -128,7 +133,9 @@ struct tipc_ehdr {
__u8 tx_key:2,
rx_key_active:2,
keepalive:1,
- reserved_1:3;
+ master_key:1,
+ rx_nokey:1,
+ reserved_1:1;
#else
#error "Please fix <asm/byteorder.h>"
#endif
@@ -158,7 +165,7 @@ int tipc_crypto_xmit(struct net *net, struct sk_buff **skb,
int tipc_crypto_rcv(struct net *net, struct tipc_crypto *rx,
struct sk_buff **skb, struct tipc_bearer *b);
int tipc_crypto_key_init(struct tipc_crypto *c, struct tipc_aead_key *ukey,
- u8 mode);
+ u8 mode, bool master_key);
void tipc_crypto_key_flush(struct tipc_crypto *c);
int tipc_aead_key_validate(struct tipc_aead_key *ukey);
bool tipc_ehdr_validate(struct sk_buff *skb);
@@ -127,7 +127,9 @@ struct tipc_skb_cb {
#ifdef CONFIG_TIPC_CRYPTO
u8 encrypted:1;
u8 decrypted:1;
- u8 probe:1;
+#define SKB_PROBING 1
+#define SKB_GRACING 2
+ u8 xmit_type:2;
u8 tx_clone_deferred:1;
#endif
};
@@ -108,6 +108,7 @@ const struct nla_policy tipc_nl_node_policy[TIPC_NLA_NODE_MAX + 1] = {
.len = TIPC_NODEID_LEN},
[TIPC_NLA_NODE_KEY] = { .type = NLA_BINARY,
.len = TIPC_AEAD_KEY_SIZE_MAX},
+ [TIPC_NLA_NODE_KEY_MASTER] = { .type = NLA_FLAG },
};
/* Properties valid for media, bearer and link */
@@ -2872,11 +2872,11 @@ static 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_crypto *tx = tipc_net(net)->crypto_tx, *c = tx;
struct tipc_node *n = NULL;
struct tipc_aead_key *ukey;
- struct tipc_crypto *c;
- u8 *id, *own_id;
+ bool master_key = false;
+ u8 *id, *own_id, mode;
int rc = 0;
if (!info->attrs[TIPC_NLA_NODE])
@@ -2886,51 +2886,45 @@ static int __tipc_nl_node_set_key(struct sk_buff *skb, struct genl_info *info)
info->attrs[TIPC_NLA_NODE],
tipc_nl_node_policy, info->extack);
if (rc)
- goto exit;
+ return rc;
own_id = tipc_own_id(net);
- if (!own_id) {
- rc = -EPERM;
- goto exit;
- }
+ if (!own_id)
+ return -EPERM;
rc = tipc_nl_retrieve_key(attrs, &ukey);
if (rc)
- goto exit;
+ return rc;
rc = tipc_aead_key_validate(ukey);
if (rc)
- goto exit;
+ return rc;
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);
+ mode = CLUSTER_KEY;
+ master_key = !!(attrs[TIPC_NLA_NODE_KEY_MASTER]);
break;
case 0:
- /* Per-node key mode */
- if (!memcmp(id, own_id, NODE_ID_LEN)) {
- c = tn->crypto_tx;
- } else {
+ mode = PER_NODE_KEY;
+ if (memcmp(id, own_id, NODE_ID_LEN)) {
n = tipc_node_find_by_id(net, id) ?:
tipc_node_create(net, 0, id, 0xffffu, 0, true);
- if (unlikely(!n)) {
- rc = -ENOMEM;
- break;
- }
+ if (unlikely(!n))
+ return -ENOMEM;
c = n->crypto_rx;
}
-
- rc = tipc_crypto_key_init(c, ukey, PER_NODE_KEY);
- if (n)
- tipc_node_put(n);
break;
default:
- break;
+ return rc;
}
-exit:
+ /* Initiate the TX/RX key */
+ rc = tipc_crypto_key_init(c, ukey, mode, master_key);
+ if (n)
+ tipc_node_put(n);
+
return (rc < 0) ? rc : 0;
}