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Bluetooth: Refactor type of keys as flags

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Converts bt_keys type to atomic_t flags to enable consistent and
compact key type management.

Change-Id: Ie384168da6d5d0d1b305a33988ce7689ba3a4c6a
Signed-off-by: Arkadiusz Lichwa <arkadiusz.lichwa@tieto.com>
This commit is contained in:
Arkadiusz Lichwa 2016-01-04 14:27:14 +01:00 • committed by Anas Nashif
commit 524ef5ee1d
4 changed files with 22 additions and 21 deletions
Download patch file Download diff file Expand all files Collapse all files

6
net/bluetooth/conn.c
View file

@ -179,12 +179,14 @@ static int start_security(struct bt_conn *conn)
}
if (conn->required_sec_level > BT_SECURITY_MEDIUM &&
conn->keys->type != BT_KEYS_AUTHENTICATED) {
!atomic_test_bit(&conn->keys->flags,
BT_KEYS_AUTHENTICATED)) {
return bt_smp_send_pairing_req(conn);
}
if (conn->required_sec_level > BT_SECURITY_HIGH &&
conn->keys->type != BT_KEYS_AUTHENTICATED &&
!atomic_test_bit(&conn->keys->flags,
BT_KEYS_AUTHENTICATED) &&
!(conn->keys->keys & BT_KEYS_LTK_P256)) {
return bt_smp_send_pairing_req(conn);
}

3
net/bluetooth/hci_core.c
View file

@ -817,7 +817,8 @@ static void update_sec_level(struct bt_conn *conn)
return;
}
if (conn->keys && conn->keys->type == BT_KEYS_AUTHENTICATED) {
if (conn->keys && atomic_test_bit(&conn->keys->flags,
BT_KEYS_AUTHENTICATED)) {
if (conn->keys->keys & BT_KEYS_LTK_P256) {
conn->sec_level = BT_SECURITY_FIPS;
} else {

3
net/bluetooth/keys.h
View file

@ -31,7 +31,6 @@ enum {
};
enum {
BT_KEYS_UNAUTHENTICATED,
BT_KEYS_AUTHENTICATED,
};
@ -54,7 +53,7 @@ struct bt_csrk {
struct bt_keys {
bt_addr_le_t addr;
int keys;
uint8_t type;
atomic_t flags;
uint8_t enc_size;
#if !defined(CONFIG_BLUETOOTH_SMP_SC_ONLY)

31
net/bluetooth/smp.c
View file

@ -1100,7 +1100,7 @@ static uint8_t legacy_request_tk(struct bt_smp *smp)
* keys with unauthenticated ones.
*/
keys = bt_keys_find_addr(&conn->le.dst);
if (keys && keys->type == BT_KEYS_AUTHENTICATED &&
if (keys && atomic_test_bit(&keys->flags, BT_KEYS_AUTHENTICATED) &&
smp->method == JUST_WORKS) {
BT_ERR("JustWorks failed, authenticated keys present");
return BT_SMP_ERR_UNSPECIFIED;
@ -1752,19 +1752,6 @@ static uint8_t smp_pairing_confirm(struct bt_smp *smp, struct net_buf *buf)
return 0;
}
static uint8_t get_keys_type(uint8_t method)
{
switch (method) {
case PASSKEY_DISPLAY:
case PASSKEY_INPUT:
case PASSKEY_CONFIRM:
return BT_KEYS_AUTHENTICATED;
case JUST_WORKS:
default:
return BT_KEYS_UNAUTHENTICATED;
}
}
static uint8_t sc_smp_send_dhkey_check(struct bt_smp *smp, const uint8_t *e)
{
struct bt_smp_dhkey_check *req;
@ -2271,7 +2258,7 @@ static uint8_t smp_security_request(struct bt_smp *smp, struct net_buf *buf)
/* if MITM required key must be authenticated */
if ((auth & BT_SMP_AUTH_MITM) &&
conn->keys->type != BT_KEYS_AUTHENTICATED) {
!atomic_test_bit(&conn->keys->flags, BT_KEYS_AUTHENTICATED)) {
if (get_io_capa() != BT_SMP_IO_NO_INPUT_OUTPUT) {
BT_INFO("New auth requirements: 0x%x, repairing",
auth);
@ -3318,7 +3305,19 @@ void bt_smp_update_keys(struct bt_conn *conn)
* it is important to store it since type is used to determine
* security level upon encryption
*/
conn->keys->type = get_keys_type(smp->method);
switch (smp->method) {
case PASSKEY_DISPLAY:
case PASSKEY_INPUT:
case PASSKEY_CONFIRM:
atomic_set_bit(&conn->keys->flags, BT_KEYS_AUTHENTICATED);
break;
case JUST_WORKS:
default:
/* unauthenticated key, clear it */
atomic_clear_bit(&conn->keys->flags, BT_KEYS_AUTHENTICATED);
break;
}
conn->keys->enc_size = get_encryption_key_size(smp);
/*