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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 09:09:06 +0200
commit8b76ce34c43a569f981623485c1b6c700594678e (patch)
tree3844c2f8bc50d978342a4a0fa5eb46b765a1aad5 /net/bluetooth/hci_event.c
parent2eeac871697ac24a77b6d7953bd711b490e83ac7 (diff)
downloadlinux-8b76ce34c43a569f981623485c1b6c700594678e.tar.bz2
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_event.c')
-rw-r--r--net/bluetooth/hci_event.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 7b61be73650f..fcbfa4138eb1 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -4955,7 +4955,8 @@ static void hci_le_ltk_request_evt(struct hci_dev *hdev, struct sk_buff *skb)
goto not_found;
}
- memcpy(cp.ltk, ltk->val, sizeof(ltk->val));
+ memcpy(cp.ltk, ltk->val, ltk->enc_size);
+ memset(cp.ltk + ltk->enc_size, 0, sizeof(cp.ltk) - ltk->enc_size);
cp.handle = cpu_to_le16(conn->handle);
conn->pending_sec_level = smp_ltk_sec_level(ltk);