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- /****************************************************************************
- * wireless/bluetooth/bt_keys.c
- * Bluetooth key handling
- *
- * Copyright (C) 2018 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * Ported from the Intel/Zephyr arduino101_firmware_source-v1.tar package
- * where the code was released with a compatible 3-clause BSD license:
- *
- * Copyright (c) 2016, Intel Corporation
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither the name of the copyright holder nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
- * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS
- * ; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- ****************************************************************************/
- /****************************************************************************
- * Included Files
- ****************************************************************************/
- #include <nuttx/config.h>
- #include <string.h>
- #include <debug.h>
- #include <nuttx/wireless/bluetooth/bt_core.h>
- #include <nuttx/wireless/bluetooth/bt_hci.h>
- #include "bt_hcicore.h"
- #include "bt_smp.h"
- #include "bt_keys.h"
- /****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
- #define bt_keys_foreach(list, cur, member) \
- for (cur = list; *cur; cur = &(*cur)->member)
- /****************************************************************************
- * Private Data
- ****************************************************************************/
- static struct bt_keys_s g_key_pool[CONFIG_BLUETOOTH_MAX_PAIRED];
- static FAR struct bt_keys_s *g_ltks;
- static FAR struct bt_keys_s *g_slave_ltks;
- static FAR struct bt_keys_s *g_irks;
- static FAR struct bt_keys_s *g_local_csrks;
- static FAR struct bt_keys_s *g_remote_csrks;
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- FAR struct bt_keys_s *bt_keys_get_addr(FAR const bt_addr_le_t *addr)
- {
- FAR struct bt_keys_s *keys;
- int i;
- wlinfo("%s\n", bt_addr_le_str(addr));
- for (i = 0; i < CONFIG_BLUETOOTH_MAX_PAIRED; i++)
- {
- keys = &g_key_pool[i];
- if (!bt_addr_le_cmp(&keys->addr, addr))
- {
- return keys;
- }
- if (!bt_addr_le_cmp(&keys->addr, BT_ADDR_LE_ANY))
- {
- bt_addr_le_copy(&keys->addr, addr);
- wlinfo("created %p for %s\n", keys, bt_addr_le_str(addr));
- return keys;
- }
- }
- wlinfo("unable to create keys for %s\n", bt_addr_le_str(addr));
- return NULL;
- }
- void bt_keys_clear(FAR struct bt_keys_s *keys, int type)
- {
- FAR struct bt_keys_s **cur;
- wlinfo("keys for %s type %d\n", bt_addr_le_str(&keys->addr), type);
- if (((type & keys->keys) & BT_KEYS_SLAVE_LTK))
- {
- bt_keys_foreach(&g_slave_ltks, cur, slave_ltk.next)
- {
- if (*cur == keys)
- {
- *cur = (*cur)->slave_ltk.next;
- break;
- }
- }
- keys->keys &= ~BT_KEYS_SLAVE_LTK;
- }
- if (((type & keys->keys) & BT_KEYS_LTK))
- {
- bt_keys_foreach(&g_ltks, cur, ltk.next)
- {
- if (*cur == keys)
- {
- *cur = (*cur)->ltk.next;
- break;
- }
- }
- keys->keys &= ~BT_KEYS_LTK;
- }
- if (((type & keys->keys) & BT_KEYS_IRK))
- {
- bt_keys_foreach(&g_irks, cur, irk.next)
- {
- if (*cur == keys)
- {
- *cur = (*cur)->irk.next;
- break;
- }
- }
- keys->keys &= ~BT_KEYS_IRK;
- }
- if (((type & keys->keys) & BT_KEYS_LOCAL_CSRK))
- {
- bt_keys_foreach(&g_local_csrks, cur, local_csrk.next)
- {
- if (*cur == keys)
- {
- *cur = (*cur)->local_csrk.next;
- break;
- }
- }
- keys->keys &= ~BT_KEYS_LOCAL_CSRK;
- }
- if (((type & keys->keys) & BT_KEYS_REMOTE_CSRK))
- {
- bt_keys_foreach(&g_remote_csrks, cur, remote_csrk.next)
- {
- if (*cur == keys)
- {
- *cur = (*cur)->remote_csrk.next;
- break;
- }
- }
- keys->keys &= ~BT_KEYS_REMOTE_CSRK;
- }
- if (!keys->keys)
- {
- memset(keys, 0, sizeof(*keys));
- }
- }
- FAR struct bt_keys_s *bt_keys_find(int type, FAR const bt_addr_le_t *addr)
- {
- FAR struct bt_keys_s **cur;
- wlinfo("type %d %s\n", type, bt_addr_le_str(addr));
- switch (type)
- {
- case BT_KEYS_SLAVE_LTK:
- bt_keys_foreach(&g_slave_ltks, cur, slave_ltk.next)
- {
- if (!bt_addr_le_cmp(&(*cur)->addr, addr))
- {
- break;
- }
- }
- return *cur;
- case BT_KEYS_LTK:
- bt_keys_foreach(&g_ltks, cur, ltk.next)
- {
- if (!bt_addr_le_cmp(&(*cur)->addr, addr))
- {
- break;
- }
- }
- return *cur;
- case BT_KEYS_IRK:
- bt_keys_foreach(&g_irks, cur, irk.next)
- {
- if (!bt_addr_le_cmp(&(*cur)->addr, addr))
- {
- break;
- }
- }
- return *cur;
- case BT_KEYS_LOCAL_CSRK:
- bt_keys_foreach(&g_local_csrks, cur, local_csrk.next)
- {
- if (!bt_addr_le_cmp(&(*cur)->addr, addr))
- {
- break;
- }
- }
- return *cur;
- case BT_KEYS_REMOTE_CSRK:
- bt_keys_foreach(&g_remote_csrks, cur, remote_csrk.next)
- {
- if (!bt_addr_le_cmp(&(*cur)->addr, addr))
- {
- break;
- }
- }
- return *cur;
- default:
- return NULL;
- }
- }
- void bt_keys_add_type(FAR struct bt_keys_s *keys, int type)
- {
- if ((keys->keys & type) != 0)
- {
- return;
- }
- switch (type)
- {
- case BT_KEYS_SLAVE_LTK:
- keys->slave_ltk.next = g_slave_ltks;
- g_slave_ltks = keys;
- break;
- case BT_KEYS_LTK:
- keys->ltk.next = g_ltks;
- g_ltks = keys;
- break;
- case BT_KEYS_IRK:
- keys->irk.next = g_irks;
- g_irks = keys;
- break;
- case BT_KEYS_LOCAL_CSRK:
- keys->local_csrk.next = g_local_csrks;
- g_local_csrks = keys;
- break;
- case BT_KEYS_REMOTE_CSRK:
- keys->remote_csrk.next = g_remote_csrks;
- g_remote_csrks = keys;
- break;
- default:
- wlerr("ERROR: Unknown key type %d\n", type);
- return;
- }
- keys->keys |= type;
- }
- FAR struct bt_keys_s *bt_keys_get_type(int type,
- FAR const bt_addr_le_t *addr)
- {
- FAR struct bt_keys_s *keys;
- wlinfo("type %d %s\n", type, bt_addr_le_str(addr));
- keys = bt_keys_find(type, addr);
- if (keys)
- {
- return keys;
- }
- keys = bt_keys_get_addr(addr);
- if (!keys)
- {
- return NULL;
- }
- bt_keys_add_type(keys, type);
- return keys;
- }
- FAR struct bt_keys_s *bt_keys_find_irk(FAR const bt_addr_le_t * addr)
- {
- FAR struct bt_keys_s **cur;
- wlinfo("%s\n", bt_addr_le_str(addr));
- if (!bt_addr_le_is_rpa(addr))
- {
- return NULL;
- }
- bt_keys_foreach(&g_irks, cur, irk.next)
- {
- FAR struct bt_irk_s *irk = &(*cur)->irk;
- if (!bt_addr_cmp((bt_addr_t *) addr->val, &irk->rpa))
- {
- wlinfo("cached RPA %s for %s\n", bt_addr_str(&irk->rpa),
- bt_addr_le_str(&(*cur)->addr));
- return *cur;
- }
- if (bt_smp_irk_matches(irk->val, (bt_addr_t *) addr->val))
- {
- FAR struct bt_keys_s *match = *cur;
- wlinfo("RPA %s matches %s\n", bt_addr_str(&irk->rpa),
- bt_addr_le_str(&(*cur)->addr));
- bt_addr_copy(&irk->rpa, (bt_addr_t *) addr->val);
- /* Move to the beginning of the list for faster future lookups. */
- if (match != g_irks)
- {
- /* Remove match from list */
- *cur = irk->next;
- /* Add match to the beginning */
- irk->next = g_irks;
- g_irks = match;
- }
- return match;
- }
- }
- wlinfo("No IRK for %s\n", bt_addr_le_str(addr));
- return NULL;
- }
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