diff options
| author | Marcel Holtmann <marcel@holtmann.org> | 2019-04-24 22:19:17 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-06-25 11:36:01 +0800 |
| commit | 5e9a6c68de0fd1ce37380e4947941bcd587d6b57 (patch) | |
| tree | 963ab39cbca112816ffdef92318b342e55f5b89c /net/bluetooth/hci_conn.c | |
| parent | 64e370233a0781aa0954ed4079e90d0bdb748b0e (diff) | |
Bluetooth: Align minimum encryption key size for LE and BR/EDR connections
commit d5bb334a8e171b262e48f378bd2096c0ea458265 upstream.
The minimum encryption key size for LE connections is 56 bits and to
align LE with BR/EDR, enforce 56 bits of minimum encryption key size for
BR/EDR connections as well.
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/bluetooth/hci_conn.c')
| -rw-r--r-- | net/bluetooth/hci_conn.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c index bd4978ce8c45..3cf0764d5793 100644 --- a/net/bluetooth/hci_conn.c +++ b/net/bluetooth/hci_conn.c @@ -1276,6 +1276,14 @@ int hci_conn_check_link_mode(struct hci_conn *conn) !test_bit(HCI_CONN_ENCRYPT, &conn->flags)) return 0; + /* The minimum encryption key size needs to be enforced by the + * host stack before establishing any L2CAP connections. The + * specification in theory allows a minimum of 1, but to align + * BR/EDR and LE transports, a minimum of 7 is chosen. + */ + if (conn->enc_key_size < HCI_MIN_ENC_KEY_SIZE) + return 0; + return 1; } |