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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 <waldemar.rymarkiewicz@tieto.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
This commit is contained in:
Waldemar Rymarkiewicz 2011-04-28 12:07:56 +02:00 committed by Gustavo F. Padovan
parent 13d39315c2
commit 60b83f571c
1 changed files with 16 additions and 4 deletions
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20
net/bluetooth/hci_event.c
View File

@ -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);