From 600a87490ff9823d065fc15e86c709e707033ecc Mon Sep 17 00:00:00 2001 From: Alain Michaud Date: Tue, 7 Jan 2020 00:43:17 +0000 Subject: Bluetooth: Implementation of MGMT_OP_SET_BLOCKED_KEYS. MGMT command is added to receive the list of blocked keys from user-space. The list is used to: 1) Block keys from being distributed by the device during the ke distribution phase of SMP. 2) Filter out any keys that were previously saved so they are no longer used. Signed-off-by: Alain Michaud Signed-off-by: Marcel Holtmann --- net/bluetooth/smp.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'net/bluetooth/smp.c') diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c index 6b42be4b5861..4ece170c518e 100644 --- a/net/bluetooth/smp.c +++ b/net/bluetooth/smp.c @@ -2453,6 +2453,15 @@ static int smp_cmd_encrypt_info(struct l2cap_conn *conn, struct sk_buff *skb) if (skb->len < sizeof(*rp)) return SMP_INVALID_PARAMS; + /* Pairing is aborted if any blocked keys are distributed */ + if (hci_is_blocked_key(conn->hcon->hdev, HCI_BLOCKED_KEY_TYPE_LTK, + rp->ltk)) { + bt_dev_warn_ratelimited(conn->hcon->hdev, + "LTK blocked for %pMR", + &conn->hcon->dst); + return SMP_INVALID_PARAMS; + } + SMP_ALLOW_CMD(smp, SMP_CMD_MASTER_IDENT); skb_pull(skb, sizeof(*rp)); @@ -2509,6 +2518,15 @@ static int smp_cmd_ident_info(struct l2cap_conn *conn, struct sk_buff *skb) if (skb->len < sizeof(*info)) return SMP_INVALID_PARAMS; + /* Pairing is aborted if any blocked keys are distributed */ + if (hci_is_blocked_key(conn->hcon->hdev, HCI_BLOCKED_KEY_TYPE_IRK, + info->irk)) { + bt_dev_warn_ratelimited(conn->hcon->hdev, + "Identity key blocked for %pMR", + &conn->hcon->dst); + return SMP_INVALID_PARAMS; + } + SMP_ALLOW_CMD(smp, SMP_CMD_IDENT_ADDR_INFO); skb_pull(skb, sizeof(*info)); -- cgit v1.2.3-59-g8ed1b