From aa5b03456500b57ab30313affa822d4cd90e2ab2 Mon Sep 17 00:00:00 2001 From: Marcel Holtmann Date: Tue, 27 Jan 2015 16:04:33 -0800 Subject: [PATCH] Bluetooth: Check for P-256 OOB values in Secure Connections Only mode 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 Signed-off-by: Johan Hedberg --- net/bluetooth/hci_event.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c index 8ed8516b18c7..00c160634e7b 100644 --- a/net/bluetooth/hci_event.c +++ b/net/bluetooth/hci_event.c @@ -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; -- 2.20.1