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Bluetooth: Check for P-256 OOB values in Secure Connections Only mode

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If Secure Connections Only mode has been enabled, the it is important
to check that OOB data for P-256 values is provided. In case it is not,
then tell the remote side that no OOB data is present.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Marcel Holtmann 2015-01-27 16:04:33 -08:00
parent a83ed81ef5
commit aa5b034565
1 changed files with 13 additions and 0 deletions
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13
net/bluetooth/hci_event.c
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@ -36,6 +36,9 @@
#include "amp.h"
#include "smp.h"
#define ZERO_KEY "\x00\x00\x00\x00\x00\x00\x00\x00" \
"\x00\x00\x00\x00\x00\x00\x00\x00"
/* Handle HCI Event packets */
static void hci_cc_inquiry_cancel(struct hci_dev *hdev, struct sk_buff *skb)
@ -3864,6 +3867,16 @@ static u8 bredr_oob_data_present(struct hci_conn *conn)
if (!data)
return 0x00;
/* When Secure Connections Only mode is enabled, then the P-256
* values are required. If they are not available, then do not
* declare that OOB data is present.
*/
if (bredr_sc_enabled(hdev) &&
test_bit(HCI_SC_ONLY, &hdev->dev_flags) &&
(!memcmp(data->rand256, ZERO_KEY, 16) ||
!memcmp(data->hash256, ZERO_KEY, 16)))
return 0x00;
if (conn->out || test_bit(HCI_CONN_REMOTE_OOB, &conn->flags))
return 0x01;