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Bluetooth: BR/EDR: Track 16 digits PIN code

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As a pairing acceptor starts tracking 16 octets PIN entered by user
when pairing devices working in Security Mode 3. Based on PIN tracker
state, the generated link key is saved in keys database as combination of
un/authenticated and legacy key type.

Change-Id: I4cbb20942fb38697d952971df807aec8b16c74e4
Signed-off-by: Arkadiusz Lichwa <arkadiusz.lichwa@tieto.com>
This commit is contained in:
Arkadiusz Lichwa 2016-01-20 13:00:58 +01:00 • committed by Gerrit Code Review
commit 998d72a986
3 changed files with 15 additions and 0 deletions
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4
net/bluetooth/conn.c
View file

@ -1126,6 +1126,10 @@ int bt_conn_auth_pincode_entry(struct bt_conn *conn, const char *pin)
return -EPERM;
}
if (len == 16) {
atomic_set_bit(conn->flags, BT_CONN_BR_LEGACY_SECURE);
}
return pin_code_reply(conn, pin, len);
}

1
net/bluetooth/conn_internal.h
View file

@ -29,6 +29,7 @@ typedef enum __packed {
/* bt_conn flags: the flags defined here represent connection parameters */
enum {
BT_CONN_AUTO_CONNECT,
BT_CONN_BR_LEGACY_SECURE, /* 16 digits legacy PIN tracker */
};
struct bt_conn_le {

10
net/bluetooth/hci_core.c
View file

@ -1609,6 +1609,16 @@ static void link_key_notify(struct net_buf *buf)
if (evt->key_type == BT_LK_COMBINATION) {
atomic_set_bit(&conn->keys->flags, BT_KEYS_BR_LEGACY);
/*
* Setting Combination Link Key as AUTHENTICATED means it was
* successfully generated by 16 digits wide PIN code.
*/
if (atomic_test_and_clear_bit(conn->flags,
BT_CONN_BR_LEGACY_SECURE)) {
atomic_set_bit(&conn->keys->flags,
BT_KEYS_AUTHENTICATED);
}
}
bt_conn_unref(conn);