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Bluetooth: Add LE SC keys support to LTK request event

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If LE SC P256 key is available use it to encrypt link.

Change-Id: I21790d6641748f34aba4058beb424bd56793713c
Signed-off-by: Szymon Janc <ext.szymon.janc@tieto.com>
This commit is contained in:
Szymon Janc 2015-11-12 10:17:49 +01:00 • committed by Anas Nashif
commit b036f916ce
1 changed files with 30 additions and 4 deletions
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34
net/bluetooth/hci_core.c
View file

@ -863,12 +863,38 @@ static void le_ltk_request(struct net_buf *buf)
}
if (!conn->keys) {
conn->keys = bt_keys_find(BT_KEYS_SLAVE_LTK, &conn->le.dst);
conn->keys = bt_keys_find(BT_KEYS_LTK_P256, &conn->le.dst);
if (!conn->keys) {
conn->keys = bt_keys_find(BT_KEYS_SLAVE_LTK,
&conn->le.dst);
}
}
if (conn->keys && (conn->keys->keys & BT_KEYS_SLAVE_LTK) &&
conn->keys->slave_ltk.rand == evt->rand &&
conn->keys->slave_ltk.ediv == evt->ediv) {
if (conn->keys && (conn->keys->keys & BT_KEYS_LTK_P256) &&
evt->rand == 0 && evt->ediv == 0) {
struct bt_hci_cp_le_ltk_req_reply *cp;
buf = bt_hci_cmd_create(BT_HCI_OP_LE_LTK_REQ_REPLY,
sizeof(*cp));
if (!buf) {
BT_ERR("Out of command buffers\n");
goto done;
}
cp = net_buf_add(buf, sizeof(*cp));
cp->handle = evt->handle;
/* use only enc_size bytes of key for encryption */
memcpy(cp->ltk, conn->keys->ltk.val, conn->keys->enc_size);
if (conn->keys->enc_size < sizeof(cp->ltk)) {
memset(cp->ltk + conn->keys->enc_size, 0,
sizeof(cp->ltk) - conn->keys->enc_size);
}
bt_hci_cmd_send(BT_HCI_OP_LE_LTK_REQ_REPLY, buf);
} else if (conn->keys && (conn->keys->keys & BT_KEYS_SLAVE_LTK) &&
conn->keys->slave_ltk.rand == evt->rand &&
conn->keys->slave_ltk.ediv == evt->ediv) {
struct bt_hci_cp_le_ltk_req_reply *cp;
buf = bt_hci_cmd_create(BT_HCI_OP_LE_LTK_REQ_REPLY,