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authorJohan Hedberg <johan.hedberg@intel.com>2015-06-08 18:14:39 +0300
committerMarcel Holtmann <marcel@holtmann.org>2015-06-09 10:09:06 +0300
commit8b76ce34c43a569f981623485c1b6c700594678e (patch)
tree3844c2f8bc50d978342a4a0fa5eb46b765a1aad5 /net/bluetooth/hci_conn.c
parent2eeac871697ac24a77b6d7953bd711b490e83ac7 (diff)
downloadlinux-8b76ce34c43a569f981623485c1b6c700594678e.tar.xz
Bluetooth: Fix encryption key size handling for LTKs
The encryption key size for LTKs is supposed to be applied only at the moment of encryption. When generating a Link Key (using LE SC) from the LTK the full non-shortened value should be used. This patch modifies the code to always keep the full value around and only apply the key size when passing the value to HCI. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/bluetooth/hci_conn.c')
-rw-r--r--net/bluetooth/hci_conn.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index ee5e59839b02..2c48bf0b5afb 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -276,7 +276,7 @@ u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
}
void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
- __u8 ltk[16])
+ __u8 ltk[16], __u8 key_size)
{
struct hci_dev *hdev = conn->hdev;
struct hci_cp_le_start_enc cp;
@@ -288,7 +288,7 @@ void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
cp.handle = cpu_to_le16(conn->handle);
cp.rand = rand;
cp.ediv = ediv;
- memcpy(cp.ltk, ltk, sizeof(cp.ltk));
+ memcpy(cp.ltk, ltk, key_size);
hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp);
}