Bluetooth: Add support for storing the key size

In some cases it will be useful having the key size used for
encrypting the link. For example, some profiles may restrict
some operations depending on the key length.

The key size is stored in the key that is passed to userspace
using the pin_length field in the key structure.

For now this field is only valid for LE controllers. 3.0+HS
controllers define the Read Encryption Key Size command, this
field is intended for storing the value returned by that
command.

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 4885914449f6..908fcd384ab4 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -1149,7 +1149,7 @@ int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
 }
 
 int hci_add_ltk(struct hci_dev *hdev, int new_key, bdaddr_t *bdaddr,
-                                        __le16 ediv, u8 rand[8], u8 ltk[16])
+                        u8 key_size, __le16 ediv, u8 rand[8], u8 ltk[16])
 {
         struct link_key *key, *old_key;
         struct key_master_id *id;
@@ -1174,6 +1174,7 @@ int hci_add_ltk(struct hci_dev *hdev, int new_key, bdaddr_t *bdaddr,
         bacpy(&key->bdaddr, bdaddr);
         memcpy(key->val, ltk, sizeof(key->val));
         key->type = HCI_LK_SMP_LTK;
+        key->pin_len = key_size;
 
         id = (void *) &key->data;
         id->ediv = ediv;