This way we can better identify which kind of key we exchanging
with userspace and userspace can take better decisions about
what to do with each type of key.
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@xxxxxxxxxxxxx>
---
include/net/bluetooth/hci.h | 10 +++++-----
include/net/bluetooth/mgmt.h | 1 +
net/bluetooth/hci_core.c | 7 ++++---
net/bluetooth/hci_event.c | 2 +-
net/bluetooth/mgmt.c | 15 ++++++++++++---
net/bluetooth/smp.c | 6 +++---
6 files changed, 26 insertions(+), 15 deletions(-)
diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index 5eb236e..a916e19 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -267,11 +267,11 @@ enum {
#define HCI_LK_UNAUTH_COMBINATION 0x04
#define HCI_LK_AUTH_COMBINATION 0x05
#define HCI_LK_CHANGED_COMBINATION 0x06
-/* The spec doesn't define types for SMP keys */
-#define HCI_LK_SMP_STK 0x80
-#define HCI_LK_SMP_LTK 0x81
-#define HCI_LK_SMP_IRK 0x82
-#define HCI_LK_SMP_CSRK 0x83
+/* The spec doesn't define types for SMP keys, the _MASTER suffix is implied */
+#define HCI_SMP_STK 0x80
+#define HCI_SMP_STK_SLAVE 0x81
+#define HCI_SMP_LTK 0x82
+#define HCI_SMP_LTK_SLAVE 0x83
/* ---- HCI Error Codes ---- */
#define HCI_ERROR_AUTH_FAILURE 0x05
diff --git a/include/net/bluetooth/mgmt.h b/include/net/bluetooth/mgmt.h
index 0f100fa9..db11475 100644
--- a/include/net/bluetooth/mgmt.h
+++ b/include/net/bluetooth/mgmt.h
@@ -268,6 +268,7 @@ struct mgmt_ltk_info {
bdaddr_t bdaddr;
__u8 pin_len;
__u8 enc_size;
+ __u8 master;
__le16 ediv;
__u8 rand[8];
__u8 val[16];
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 8d96125..f81c08b 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -1078,7 +1078,7 @@ struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
continue;
/* The STK should only be used once, no need to keep it */
- if (k->type == HCI_LK_SMP_STK)
+ if (k->type & HCI_SMP_STK)
list_del(&k->list);
return k;
@@ -1161,7 +1161,7 @@ int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type, int new_key,
{
struct smp_ltk *key, *old_key;
- if (type != HCI_LK_SMP_STK && type != HCI_LK_SMP_LTK)
+ if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
return 0;
old_key = hci_find_ltk_addr(hdev, bdaddr);
@@ -1179,12 +1179,13 @@ int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type, int new_key,
key->pin_len = pin_len;
key->ediv = ediv;
key->enc_size = enc_size;
+ key->type = type;
memcpy(key->rand, rand, sizeof(key->rand));
if (!new_key)
return 0;
- if (type == HCI_LK_SMP_LTK)
+ if (type & HCI_SMP_LTK)
mgmt_new_ltk(hdev, key, 1);
return 0;
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index f2006e9..19cc22a 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -3032,7 +3032,7 @@ static inline void hci_le_ltk_request_evt(struct hci_dev *hdev,
hci_send_cmd(hdev, HCI_OP_LE_LTK_REPLY, sizeof(cp), &cp);
- if (ltk->type == HCI_LK_SMP_STK)
+ if (ltk->type & HCI_SMP_STK)
kfree(ltk);
hci_dev_unlock(hdev);
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index f7314d1..fd509ca 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -2104,10 +2104,15 @@ static int load_long_term_keys(struct sock *sk, u16 index,
for (i = 0; i < key_count; i++) {
struct mgmt_ltk_info *key = &cp->keys[i];
+ u8 type;
- hci_add_ltk(hdev, &key->bdaddr, HCI_LK_SMP_LTK, 0,
- key->pin_len, key->val, key->enc_size,
- key->ediv, key->rand);
+ if (key->master)
+ type = HCI_SMP_LTK;
+ else
+ type = HCI_SMP_LTK_SLAVE;
+
+ hci_add_ltk(hdev, &key->bdaddr, type, 0, key->pin_len,
+ key->val, key->enc_size, key->ediv, key->rand);
}
hci_dev_unlock_bh(hdev);
@@ -2417,6 +2422,10 @@ int mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, u8 persistent)
ev.key.pin_len = key->pin_len;
ev.key.enc_size = key->enc_size;
ev.key.ediv = key->ediv;
+
+ if (key->type == HCI_SMP_LTK)
+ ev.key.master = 1;
+
memcpy(ev.key.rand, key->rand, sizeof(key->rand));
memcpy(ev.key.val, key->val, sizeof(key->val));
diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c
index 4763719..14e554c 100644
--- a/net/bluetooth/smp.c
+++ b/net/bluetooth/smp.c
@@ -358,7 +358,7 @@ static void random_work(struct work_struct *work)
memset(stk + smp->enc_key_size, 0,
SMP_MAX_ENC_KEY_SIZE - smp->enc_key_size);
- hci_add_ltk(hcon->hdev, conn->dst, HCI_LK_SMP_STK, 0,
+ hci_add_ltk(hcon->hdev, conn->dst, HCI_SMP_STK_SLAVE, 0,
0, stk, smp->enc_key_size, ediv, rand);
}
@@ -635,7 +635,7 @@ static int smp_cmd_master_ident(struct l2cap_conn *conn, struct sk_buff *skb)
skb_pull(skb, sizeof(*rp));
hci_dev_lock(hdev);
- hci_add_ltk(conn->hcon->hdev, conn->dst, HCI_LK_SMP_LTK, 1,
+ hci_add_ltk(conn->hcon->hdev, conn->dst, HCI_SMP_LTK, 1,
conn->hcon->pin_length, smp->tk,
smp->enc_key_size, rp->ediv, rp->rand);
@@ -758,7 +758,7 @@ int smp_distribute_keys(struct l2cap_conn *conn, __u8 force)
smp_send_cmd(conn, SMP_CMD_ENCRYPT_INFO, sizeof(enc), &enc);
- hci_add_ltk(conn->hcon->hdev, conn->src, HCI_LK_SMP_LTK, 1,
+ hci_add_ltk(conn->hcon->hdev, conn->src, HCI_SMP_LTK_SLAVE, 1,
conn->hcon->pin_length, enc.ltk,
smp->enc_key_size, ediv, ident.rand);
--
1.7.8
--
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