Commit a6f7833c authored by Johan Hedberg's avatar Johan Hedberg Committed by Marcel Holtmann

Bluetooth: Add smp_ltk_sec_level() helper function

There are several places that need to determine the security level that
an LTK can provide. This patch adds a convenience function for this to
help make the code more readable.
Signed-off-by: default avatarJohan Hedberg <>
Signed-off-by: default avatarMarcel Holtmann <>
parent 1afc2a1a
......@@ -4506,10 +4506,7 @@ static void hci_le_ltk_request_evt(struct hci_dev *hdev, struct sk_buff *skb)
memcpy(cp.ltk, ltk->val, sizeof(ltk->val));
cp.handle = cpu_to_le16(conn->handle);
if (ltk->authenticated)
conn->pending_sec_level = BT_SECURITY_HIGH;
conn->pending_sec_level = BT_SECURITY_MEDIUM;
conn->pending_sec_level = smp_ltk_sec_level(ltk);
conn->enc_key_size = ltk->enc_size;
......@@ -1114,7 +1114,7 @@ static bool smp_ltk_encrypt(struct l2cap_conn *conn, u8 sec_level)
if (!key)
return false;
if (sec_level > BT_SECURITY_MEDIUM && !key->authenticated)
if (smp_ltk_sec_level(key) < sec_level)
return false;
if (test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &hcon->flags))
......@@ -125,6 +125,14 @@ enum {
static inline u8 smp_ltk_sec_level(struct smp_ltk *key)
if (key->authenticated)
/* SMP Commands */
bool smp_sufficient_security(struct hci_conn *hcon, u8 sec_level);
int smp_conn_security(struct hci_conn *hcon, __u8 sec_level);
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