Bluetooth: Add support for using the crypto subsystem
This will allow using the crypto subsystem for encrypting data. As SMP
(Security Manager Protocol) is implemented almost entirely on the host
side and the crypto module already implements the needed methods
(AES-128), it makes sense to use it.
There's now a new module option to enable/disable SMP support.
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c
index 2240e96..aa20bee 100644
--- a/net/bluetooth/smp.c
+++ b/net/bluetooth/smp.c
@@ -154,9 +154,13 @@
int smp_conn_security(struct l2cap_conn *conn, __u8 sec_level)
{
+ struct hci_conn *hcon = conn->hcon;
__u8 authreq;
- BT_DBG("conn %p hcon %p level 0x%2.2x", conn, conn->hcon, sec_level);
+ BT_DBG("conn %p hcon %p level 0x%2.2x", conn, hcon, sec_level);
+
+ if (IS_ERR(hcon->hdev->tfm))
+ return 1;
switch (sec_level) {
case BT_SECURITY_MEDIUM:
@@ -174,7 +178,7 @@
return 1;
}
- if (conn->hcon->link_mode & HCI_LM_MASTER) {
+ if (hcon->link_mode & HCI_LM_MASTER) {
struct smp_cmd_pairing cp;
cp.io_capability = 0x00;
cp.oob_flag = 0x00;
@@ -198,6 +202,12 @@
__u8 reason;
int err = 0;
+ if (IS_ERR(conn->hcon->hdev->tfm)) {
+ err = PTR_ERR(conn->hcon->hdev->tfm);
+ reason = SMP_PAIRING_NOTSUPP;
+ goto done;
+ }
+
skb_pull(skb, sizeof(code));
switch (code) {
@@ -233,10 +243,14 @@
BT_DBG("Unknown command code 0x%2.2x", code);
reason = SMP_CMD_NOTSUPP;
+ err = -EOPNOTSUPP;
+ goto done;
+ }
+
+done:
+ if (reason)
smp_send_cmd(conn, SMP_CMD_PAIRING_FAIL, sizeof(reason),
&reason);
- err = -EOPNOTSUPP;
- }
kfree_skb(skb);
return err;