Bluetooth: Add MGMT handlers for dealing with SMP LTK's

This adds a method to notify that a new LTK is available and
a handler to store keys coming from userspace into the kernel LTK
list.

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

1 files changed, 80 insertions, 0 deletions

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index ad8986276848..fd0b08115f2e 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -2191,6 +2191,60 @@ done:
         return err;
 }
 
+static int load_long_term_keys(struct sock *sk, u16 index,
+                                        void *cp_data, u16 len)
+{
+        struct hci_dev *hdev;
+        struct mgmt_cp_load_long_term_keys *cp = cp_data;
+        u16 key_count, expected_len;
+        int i;
+
+        if (len < sizeof(*cp))
+                return cmd_status(sk, index, MGMT_OP_LOAD_LONG_TERM_KEYS,
+                                                                EINVAL);
+
+        key_count = get_unaligned_le16(&cp->key_count);
+
+        expected_len = sizeof(*cp) + key_count *
+                                        sizeof(struct mgmt_ltk_info);
+        if (expected_len != len) {
+                BT_ERR("load_keys: expected %u bytes, got %u bytes",
+                                                        len, expected_len);
+                return cmd_status(sk, index, MGMT_OP_LOAD_LONG_TERM_KEYS,
+                                                                EINVAL);
+        }
+
+        hdev = hci_dev_get(index);
+        if (!hdev)
+                return cmd_status(sk, index, MGMT_OP_LOAD_LONG_TERM_KEYS,
+                                                                ENODEV);
+
+        BT_DBG("hci%u key_count %u", index, key_count);
+
+        hci_dev_lock(hdev);
+
+        hci_smp_ltks_clear(hdev);
+
+        for (i = 0; i < key_count; i++) {
+                struct mgmt_ltk_info *key = &cp->keys[i];
+                u8 type;
+
+                if (key->master)
+                        type = HCI_SMP_LTK;
+                else
+                        type = HCI_SMP_LTK_SLAVE;
+
+                hci_add_ltk(hdev, &key->addr.bdaddr, key->addr.type,
+                                        type, 0, key->authenticated, key->val,
+                                        key->enc_size, key->ediv, key->rand);
+        }
+
+        hci_dev_unlock(hdev);
+        hci_dev_put(hdev);
+
+        return 0;
+}
+
 int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen)
 {
         void *buf;
@@ -2325,6 +2379,9 @@ int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen)
         case MGMT_OP_UNBLOCK_DEVICE:
                 err = unblock_device(sk, index, cp, len);
                 break;
+        case MGMT_OP_LOAD_LONG_TERM_KEYS:
+                err = load_long_term_keys(sk, index, cp, len);
+                break;
         default:
                 BT_DBG("Unknown op %u", opcode);
                 err = cmd_status(sk, index, opcode,
@@ -2478,6 +2535,29 @@ int mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
         return mgmt_event(MGMT_EV_NEW_LINK_KEY, hdev, &ev, sizeof(ev), NULL);
 }
 
+int mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, u8 persistent)
+{
+        struct mgmt_ev_new_long_term_key ev;
+
+        memset(&ev, 0, sizeof(ev));
+
+        ev.store_hint = persistent;
+        bacpy(&ev.key.addr.bdaddr, &key->bdaddr);
+        ev.key.addr.type = key->bdaddr_type;
+        ev.key.authenticated = key->authenticated;
+        ev.key.enc_size = key->enc_size;
+        ev.key.ediv = key->ediv;
+
+        if (key->type == HCI_SMP_LTK)
+                ev.key.master = 1;
+
+        memcpy(ev.key.rand, key->rand, sizeof(key->rand));
+        memcpy(ev.key.val, key->val, sizeof(key->val));
+
+        return mgmt_event(MGMT_EV_NEW_LONG_TERM_KEY, hdev,
+                                                &ev, sizeof(ev), NULL);
+}
+
 int mgmt_device_connected(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
                                         u8 addr_type, u8 *name, u8 name_len,
                                         u8 *dev_class)