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@xxxxxxxxxxxx>
---
include/net/bluetooth/hci_core.h | 1 +
net/bluetooth/mgmt.c | 5 ++++-
net/bluetooth/msft.c | 3 +++
3 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 58f7eada26fd..c73ac52af186 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -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)
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 59f8016c4866..288c1445c232 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -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) || hdev->msft_curve_validity)
flags |= 0x01; /* Remote public key validation (BR/EDR) */
flags |= 0x02; /* Remote public key validation (LE) */
diff --git a/net/bluetooth/msft.c b/net/bluetooth/msft.c
index 47b104f318e9..b1970467a868 100644
--- a/net/bluetooth/msft.c
+++ b/net/bluetooth/msft.c
@@ -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;
--
2.30.2
