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 <[email protected]>
---
include/net/bluetooth/hci_core.h | 1 +
net/bluetooth/mgmt.c | 5 ++++-
net/bluetooth/msft.c | 8 ++++++++
net/bluetooth/msft.h | 6 ++++++
4 files changed, 19 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..f9be7f9084d6 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) || msft_curve_validity(hdev))
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..e28f15439ce4 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;
@@ -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;
+}
diff --git a/net/bluetooth/msft.h b/net/bluetooth/msft.h
index 88ed613dfa08..6e56d94b88d8 100644
--- a/net/bluetooth/msft.h
+++ b/net/bluetooth/msft.h
@@ -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
--
2.30.2