From 60b83f571cf17a7a8ca9ddf2090db63e6a594571 Mon Sep 17 00:00:00 2001 From: Waldemar Rymarkiewicz Date: Thu, 28 Apr 2011 12:07:56 +0200 Subject: [PATCH] Bluetooth: Ignore key unauthenticated for high security High security level for pre v2.1 devices requires combination link key authenticated by at least 16 digit PIN code. It's also necessary to update key_type and pin_length when the key exists and is sufficently secured for the connection as there will be no link key notify event in that case. Signed-off-by: Waldemar Rymarkiewicz Signed-off-by: Gustavo F. Padovan --- net/bluetooth/hci_event.c | 20 ++++++++++++++++---- 1 file changed, 16 insertions(+), 4 deletions(-) diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c index 655af8bc60e2..40e96cd79e4a 100644 --- a/net/bluetooth/hci_event.c +++ b/net/bluetooth/hci_event.c @@ -2059,11 +2059,23 @@ static inline void hci_link_key_request_evt(struct hci_dev *hdev, struct sk_buff } conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); + if (conn) { + if (key->type == HCI_LK_UNAUTH_COMBINATION && + conn->auth_type != 0xff && + (conn->auth_type & 0x01)) { + BT_DBG("%s ignoring unauthenticated key", hdev->name); + goto not_found; + } - if (key->type == HCI_LK_UNAUTH_COMBINATION && conn && - conn->auth_type != 0xff && (conn->auth_type & 0x01)) { - BT_DBG("%s ignoring unauthenticated key", hdev->name); - goto not_found; + if (key->type == HCI_LK_COMBINATION && key->pin_len < 16 && + conn->pending_sec_level == BT_SECURITY_HIGH) { + BT_DBG("%s ignoring key unauthenticated for high \ + security", hdev->name); + goto not_found; + } + + conn->key_type = key->type; + conn->pin_length = key->pin_len; } bacpy(&cp.bdaddr, &ev->bdaddr);