diff options
| author | Johan Hedberg <johan.hedberg@intel.com> | 2014-07-01 18:14:13 +0200 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2014-07-03 17:42:54 +0200 |
| commit | 9ab65d60c212c23f1605f35aea229f4c94df2334 (patch) | |
| tree | 5ee86b593782a7f61b2301117569c31fd37a8f88 /net/bluetooth/smp.c | |
| parent | Bluetooth: Add flag to track STK encryption (diff) | |
| download | linux-9ab65d60c212c23f1605f35aea229f4c94df2334.tar.xz linux-9ab65d60c212c23f1605f35aea229f4c94df2334.zip | |
Bluetooth: Allow re-encryption with LTK when STK is in use
If we're encrypted with the STK we should allow re-encryption with an
LTK even though the achieved security level is the same. This patch adds
the necessary logic to the smp_sufficient_security function which is
used to determine whether to proceed with encryption or not.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/bluetooth/smp.c')
| -rw-r--r-- | net/bluetooth/smp.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c index 68e6f245581c..55c41de2f5a0 100644 --- a/net/bluetooth/smp.c +++ b/net/bluetooth/smp.c @@ -868,6 +868,14 @@ bool smp_sufficient_security(struct hci_conn *hcon, u8 sec_level) if (sec_level == BT_SECURITY_LOW) return true; + /* If we're encrypted with an STK always claim insufficient + * security. This way we allow the connection to be re-encrypted + * with an LTK, even if the LTK provides the same level of + * security. + */ + if (test_bit(HCI_CONN_STK_ENCRYPT, &hcon->flags)) + return false; + if (hcon->sec_level >= sec_level) return true; |