Return-Path: From: Vinicius Costa Gomes To: linux-bluetooth@vger.kernel.org Cc: Vinicius Costa Gomes Subject: [RFC 10/15] Bluetooth: Use the stored LTK for restabilishing security Date: Tue, 5 Apr 2011 23:11:23 -0300 Message-Id: <1302055888-28177-11-git-send-email-vinicius.gomes@openbossa.org> In-Reply-To: <1302055888-28177-1-git-send-email-vinicius.gomes@openbossa.org> References: <1302055888-28177-1-git-send-email-vinicius.gomes@openbossa.org> Sender: linux-bluetooth-owner@vger.kernel.org List-ID: Now that it's possible that the exchanged key is present in the link key list, we may be able to estabilish security with an already existing key, without need to perform any SMP procedure. Signed-off-by: Vinicius Costa Gomes --- net/bluetooth/smp.c | 15 +++++++++++++++ 1 files changed, 15 insertions(+), 0 deletions(-) diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c index 4a314cc..3fd97db 100644 --- a/net/bluetooth/smp.c +++ b/net/bluetooth/smp.c @@ -487,6 +487,20 @@ int smp_conn_security(struct l2cap_conn *conn, __u8 sec_level) authreq = seclevel_to_authreq(sec_level); if (hcon->link_mode & HCI_LM_MASTER) { + struct link_key *key; + + key = hci_find_link_key_type(hcon->hdev, conn->dst, + KEY_TYPE_LTK); + if (key) { + struct key_master_id *master = (void *) key->data; + + hci_le_start_enc(hcon, master->ediv, master->rand, + key->val); + goto done; + } + } + + if (hcon->link_mode & HCI_LM_MASTER) { struct smp_cmd_pairing cp; build_pairing_cmd(conn, &cp, NULL, authreq); @@ -503,6 +517,7 @@ int smp_conn_security(struct l2cap_conn *conn, __u8 sec_level) smp_send_cmd(conn, SMP_CMD_SECURITY_REQ, sizeof(cp), &cp); } +done: hcon->pending_sec_level = sec_level; set_bit(HCI_CONN_ENCRYPT_PEND, &hcon->pend); -- 1.7.4.1