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 <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
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@ -36,6 +36,9 @@
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#include "amp.h"
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#include "smp.h"
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#define ZERO_KEY "\x00\x00\x00\x00\x00\x00\x00\x00" \
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"\x00\x00\x00\x00\x00\x00\x00\x00"
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/* Handle HCI Event packets */
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static void hci_cc_inquiry_cancel(struct hci_dev *hdev, struct sk_buff *skb)
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@ -3864,6 +3867,16 @@ static u8 bredr_oob_data_present(struct hci_conn *conn)
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if (!data)
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return 0x00;
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/* When Secure Connections Only mode is enabled, then the P-256
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* values are required. If they are not available, then do not
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* declare that OOB data is present.
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*/
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if (bredr_sc_enabled(hdev) &&
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test_bit(HCI_SC_ONLY, &hdev->dev_flags) &&
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(!memcmp(data->rand256, ZERO_KEY, 16) ||
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!memcmp(data->hash256, ZERO_KEY, 16)))
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return 0x00;
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if (conn->out || test_bit(HCI_CONN_REMOTE_OOB, &conn->flags))
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return 0x01;
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