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Bluetooth: Allow Microsoft extension to indicate curve validation

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Some controllers don't support the Simple Pairing Options feature that
can indicate the support for P-192 and P-256 public key validation.
However they might support the Microsoft vendor extension that can
indicate the validiation capability as well.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Marcel Holtmann 2021-04-06 21:55:56 +02:00
parent ba29d0360a
commit a61d67188f
4 changed files with 19 additions and 1 deletions
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1
include/net/bluetooth/hci_core.h
View File

@ -584,6 +584,7 @@ struct hci_dev {
#if IS_ENABLED(CONFIG_BT_MSFTEXT)
__u16 msft_opcode;
void *msft_data;
bool msft_curve_validity;
#endif
#if IS_ENABLED(CONFIG_BT_AOSPEXT)

5
net/bluetooth/mgmt.c
View File

@ -3730,8 +3730,11 @@ static int read_controller_cap(struct sock *sk, struct hci_dev *hdev,
/* When the Read Simple Pairing Options command is supported, then
* the remote public key validation is supported.
*
* Alternatively, when Microsoft extensions are available, they can
* indicate support for public key validation as well.
*/
if (hdev->commands[41] & 0x08)
if ((hdev->commands[41] & 0x08) || msft_curve_validity(hdev))
flags |= 0x01; /* Remote public key validation (BR/EDR) */
flags |= 0x02; /* Remote public key validation (LE) */

8
net/bluetooth/msft.c
View File

@ -142,6 +142,9 @@ static bool read_supported_features(struct hci_dev *hdev,
msft->evt_prefix_len = rp->evt_prefix_len;
msft->features = __le64_to_cpu(rp->features);
if (msft->features & MSFT_FEATURE_MASK_CURVE_VALIDITY)
hdev->msft_curve_validity = true;
kfree_skb(skb);
return true;
@ -605,3 +608,8 @@ int msft_set_filter_enable(struct hci_dev *hdev, bool enable)
return err;
}
bool msft_curve_validity(struct hci_dev *hdev)
{
return hdev->msft_curve_validity;
}

6
net/bluetooth/msft.h
View File

@ -22,6 +22,7 @@ int msft_remove_monitor(struct hci_dev *hdev, struct adv_monitor *monitor,
u16 handle);
void msft_req_add_set_filter_enable(struct hci_request *req, bool enable);
int msft_set_filter_enable(struct hci_dev *hdev, bool enable);
bool msft_curve_validity(struct hci_dev *hdev);
#else
@ -54,4 +55,9 @@ static inline int msft_set_filter_enable(struct hci_dev *hdev, bool enable)
return -EOPNOTSUPP;
}
static inline bool msft_curve_validity(struct hci_dev *hdev)
{
return false;
}
#endif